JP-3GA-23.093(R99) Call Completion to Busy … Completion to Busy Subscriber (CCBS) ; Stage 2...
Transcript of JP-3GA-23.093(R99) Call Completion to Busy … Completion to Busy Subscriber (CCBS) ; Stage 2...
JP-3GA-23.093(R99)
Call Completion to Busy Subscriber (CCBS) ; Stage 2
Version 2
May 14, 2001
THE TELECOMMUNICATION TECHNOLOGY COMMITTEE
JP-3GA-23.093(R99) Completion of Calls to Busy Subscriber (CCBS) - Stage 2
Remarks
1.Application level of English description Application level : E3
English description is included in the text and figures of main body, annexes and appendices.
2. Relationship with international recommendations and standards This standard is standardized based on the Technical Specification 23.093 (Version 3.2.0) approved by 3GPP
in September. 2000.
3. Departures from international recommendations
3.1 Selection of optional items
None
3.2 Items of national matter
None
3.3 Changes to original standard
(1) Standards referred to in the original standard, which are replaced by TTC/ARIB standards.
Refer to Table.1
(2) Items added to the original standard
None
(3) Items deleted from the original standard
None
(4) Items changed from the original standard
None
3.4 Difference in chapter ordering from the original standard.
There is no difference in chapter ordering from the original standard.
4. Change history
Revision Date Contents
V.1 Mar.31,2000 Newly standardized
V.2 May.14,2001 Revised based on the Technical Specification 23.093
(Version 3.2.0) approved by 3GPP
JP-3GA-23.093(R99) ii
5. IPR
There is no specific description about IPR in this standard.
6. Others
None
Table 1 Replaced standards referred
original standard replacement
3G TR 21.905
Title : Vocabulary for 3GPP Specifications
TTC TECHNICAL DOCUMENT TD-3GA-21.905(R99)
Title : Vocabulary for 3GPP Specifications
3GPP TS 22.030
Title : Man Machine Interface (MMI) of the Mobile
Station (MS)
ARIB STANDARDS ARIB STD-T63-22.030
Title : IMT-2000 DS-CDMA System
Man Machine Interface (MMI) of the Mobile
Station (MS)
3G TS 22.093
Title : Completion of calls to busy subscriber(CCBS);
supplementary services; Stage 1
TTC STANDARDS JP-3GA-22.093(R99)
Title : Completion of calls to busy subscriber(CCBS);
supplementary services; Stage 1
3G TS 23.011
Title : Technical realization of supplementary
Services-General Aspects
TTC STANDARDS JP-3GA-23.011(R99)
Title : Technical realization of supplementary
Services-General Aspects
3G TS 23.018
Title : Basic Call Handling-Technical Realization
TTC STANDARDS JP-3GA-23.018(R99)
Title : Basic Call Handling-Technical Realization
3G TS 23.078
Title : Customised Applications for Mobile network
Enhanced Logic (CAMEL) Phase 3- Stage 2
TTC STANDARDS JP-3GA-23.078(R99)
Title : Customised Applications for Mobile network
Enhanced Logic (CAMEL) Phase 3- Stage 2
3G TS 23.079
Title : Support for Optimal Routeing(SOR) –Technical
Realization
TTC STANDARDS JP-3GA-23.079(R99)
Title : Support for Optimal Routeing(SOR) –Technical
Realization
3G TS 24.008
Title : Digital cellular telecommunications system
(Phase 2+); Mobile radio interface layer3
Specification
TTC STANDARDS JP-3GA-24.008(R99)
Title : Digital cellular telecommunications system
(Phase 2+); Mobile radio interface layer3
Specification
3G TS 29.002
Title : Mobile Application Part (MAP) specification
TTC STANDARDS JP-3GA-29.002(R99)
Title : Mobile Application Part (MAP) specification
3GPP TS 23.093 V3.2.0 (2000-09) Technical Specification
3rd Generation Partnership Project;Technical Specification Group Core Network;
Technical realization ofCompletion of Calls to Busy Subscriber (CCBS); Stage 2
(Release 1999)
The present document has been developed within the 3rd Generation Partnership Project (3GPP TM) and may be further elaborated for the purposes of 3GPP. The present document has not been subject to any approval process by the 3GPP Organisational Partners and shall not be implemented. This Specification is provided for future development work within 3GPP only. The Organisational Partners accept no liability for any use of this Specification.Specifications and reports for implementation of the 3GPP TM system should be obtained via the 3GPP Organisational Partners' Publications Offices.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)2Release 1999
Keywords UMTS, GSM, network, CCBS, supplementary service, stage 2
3GPP
Postal address
3GPP support office address 650 Route des Lucioles - Sophia Antipolis
Valbonne - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Internet http://www.3gpp.org
Copyright Notification
No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© 2000, 3GPP Organizational Partners (ARIB, CWTS, ETSI, T1, TTA,TTC).
All rights reserved.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)3Release 1999
Contents Foreword ..................................................................................................................................................... 5 1 Scope ................................................................................................................................................. 6 2 Normative references ......................................................................................................................... 6 3 Definitions and abbreviations ............................................................................................................. 6 3.1 Definitions........................................................................................................................................................ 6 3.2 Abbreviations ................................................................................................................................................... 7 4 General .............................................................................................................................................. 7 4.1 Overview.......................................................................................................................................................... 7 4.2 Architecture...................................................................................................................................................... 7 4.2.1 Architectural overview during roaming........................................................................................................ 8 5 Handling of completion of calls to busy subscriber ............................................................................. 9 5.1 CCBS Timers ................................................................................................................................................... 9 5.2 Information flows ........................................................................................................................................... 10 5.3 Activation....................................................................................................................................................... 14 5.4 Deactivation ................................................................................................................................................... 15 5.5 Interrogation................................................................................................................................................... 16 5.6 Messages and their contents ............................................................................................................................ 17 5.6.1 Information elements used in the messages ................................................................................................ 17 5.6.1.1 Call Information information element ........................................................................................................ 17 5.6.1.2 AddressOfB information element............................................................................................................... 17 5.6.1.3 CCBS Description information element ..................................................................................................... 17 5.6.2 Messages between MS and MSC ............................................................................................................... 18 5.6.3 Messages between MSC and VLR (B-interface)......................................................................................... 19 5.6.3.1 Messages between MSC and VLR in the originating network..................................................................... 19 5.6.3.2 Messages between MSC and VLR in the destination network..................................................................... 21 5.6.4 Messages between VLR and HLR (D-interface) ......................................................................................... 22 5.6.4.1 Messages between VLR and HLR in the originating network ..................................................................... 22 5.6.4.2 Messages between VLR and HLR in the destination network ..................................................................... 24 5.6.5 Messages between MSC and HLR (C-interface)......................................................................................... 25 5.6.6 Messages between MSC - MSC (E-interface)............................................................................................. 25 5.6.7 Existing parameters containing CCBS specific information ........................................................................ 25 6 Monitoring and CCBS Call Reporting .............................................................................................. 26 6.1 Monitoring ..................................................................................................................................................... 26 6.1.1 Overview .................................................................................................................................................. 26 6.1.2 Monitoring Subscriber B-state information ................................................................................................ 26 6.1.3 Monitoring Subscriber A state information:................................................................................................ 26 6.2 MSC/VLR Monitoring Model ......................................................................................................................... 27 6.2.1 Subscriber status........................................................................................................................................ 27 6.2.1.1 Idle ........................................................................................................................................................... 28 6.2.1.2 Not Idle..................................................................................................................................................... 28 6.2.1.3 Not Reachable ........................................................................................................................................... 28 6.2.2 Reporting of subscriber state transitions..................................................................................................... 29 6.2.2.1 Start Reporting of Monitoring Events......................................................................................................... 29 6.2.2.2 Stop Reporting of Monitoring Events......................................................................................................... 29 6.3 CCBS Call Reporting...................................................................................................................................... 30 6.3.1 Overview .................................................................................................................................................. 30 6.3.2 Originating Network (A-side) .................................................................................................................... 30 6.3.3 Destination Network (B-side) .................................................................................................................... 30 6.3.3.1 Interaction of Event Reporting and CCBS Call Report ............................................................................... 30 6.4 Location Update ............................................................................................................................................. 30 7 Mobility ........................................................................................................................................... 31 7.1 Mobility during Activation.............................................................................................................................. 31 7.2 Number used within CCBS Call...................................................................................................................... 31
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7.3 MS does Location Update ............................................................................................................................... 31 7.4 Mobility during CCBS Call in the destination network .................................................................................... 31 8 Interaction with other supplementary services................................................................................... 32 8.1 Call forwarding unconditional (CFU) .............................................................................................................. 32 8.2 Call forward on busy (CFB) ............................................................................................................................ 32 8.3 Call forwarding on no reply (CFNRy) ............................................................................................................. 32 8.4 Call forwarding on MS not reachable (CFNRc) ............................................................................................... 32 8.5 Call Waiting (CW).......................................................................................................................................... 33 8.6 Multiparty service (MPTY)............................................................................................................................. 33 8.7 Closed user group (CUG)................................................................................................................................ 33 8.8 Advice Of Charge (AoC) ................................................................................................................................ 33 8.9 Barring of all outgoing calls (BAOC) .............................................................................................................. 33 8.10 Barring of outgoing international calls (BOIC)........................................................................................... 33 8.11 Barring of outgoing international calls except those directed to the home PLMN country (BOIC-exHC) ..... 33 8.12 Barring of all incoming calls (BAIC) ......................................................................................................... 33 8.13 Barring of incoming calls when roaming outside the home PLMN country (BIC-Roam)............................. 34 8.14 Completion of calls to busy subscriber (CCBS).......................................................................................... 34 9 Interaction with other network features............................................................................................. 35 9.1 Customised Applications for Mobile network Enhanced Logic (CAMEL)........................................................ 35 9.2 Support of Optimal Routeing (SOR)................................................................................................................ 35 10 Interworking with other networks ..................................................................................................... 36 10.1 Interworking with network entities not supporting CCBS ........................................................................... 36 10.1.1 CCBS not supported by MSC A................................................................................................................. 36 10.1.2 CCBS not supported by HLR B ................................................................................................................. 36 10.1.3 CCBS not supported by MSC B................................................................................................................. 37 11 Network entity functions .................................................................................................................. 38 11.1 Originating Network Processes .................................................................................................................. 38 11.1.1 Processes and procedures in MSC/VLR ..................................................................................................... 38 11.1.2 Processes and procedures in HLR .............................................................................................................. 60 11.2 Destination Network Processes .................................................................................................................. 91 11.2.1 Procedures in GMSC................................................................................................................................. 91 11.2.2 Processes and procedures in HLR .............................................................................................................. 97 11.2.3 Procedures in MSC/VLR......................................................................................................................... 127 11.3 Processes and procedures common in originating and destination network entities.................................... 139 12 Information stored in the HLRs ...................................................................................................... 155 12.1 Originating Network Data........................................................................................................................ 155 12.2 Destination Network Data........................................................................................................................ 155 12.3 Transfer of information from HLR to VLR .............................................................................................. 156 13 State transition model..................................................................................................................... 157 13.1 State transition model for the CCBS service in the originating network .................................................... 157 13.2 State transition model for the CCBS service in the destination network .................................................... 157 13.3 State transition model for a CCBS Request .............................................................................................. 158 13.4 Information stored in the VLRs................................................................................................................ 159
Annex A (Informative): Message flow diagrams showing a successful CCBS request ................. 160
Annex A: Change history............................................................................................................... 163
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3GPP TS 23.093 V3.2.0 (2000-09)5Release 1999
Foreword This Technical Specification has been produced by the 3GPP.
This specification gives the stage 2 description of the Completion of Calls to Busy Subscriber (CCBS) supplementary service within the 3GPP system.
The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of this TS, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows:
Version 3.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 Indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the specification;
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3GPP TS 23.093 V3.2.0 (2000-09)6Release 1999
1 Scope This Technical Specification gives the stage 2 description of the Completion of Calls to Busy Subscriber (CCBS) supplementary service.
2 Normative references References may be made to:
a) specific versions of publications (identified by date of publication, edition number, version number, etc.), in which case, subsequent revisions to the referenced document do not apply; or
b) all versions up to and including the identified version (identified by "up to and including" before the version identity); or
c) all versions subsequent to and including the identified version (identified by "onwards" following the version identity); or
d) publications without mention of a specific version, in which case the latest version applies.
A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same number.
[1] 3GPP TR 21.905: "3G Vocabulary".
[2] 3GPP TS 22.030: "Man Machine Interface (MMI) of the Mobile Station (MS)".
[3] 3GPP TS 22.093: "Completion of calls to busy subscriber (CCBS) supplementary services - Stage 1".
[4] 3GPP TS 23.011: "Technical realization of supplementary services - General Aspects".
[5] 3GPP TS 23.018: "Basic Call Handling - Technical Realization".
[6] 3GPP TS 23.078: "Customised Applications for Mobile network Enhanced Logic (CAMEL) - Stage 2".
[7] 3GPP TS 23.079: "Support for Optimal Routeing (SOR) - Technical Realization".
[8] 3GPP TS 24.008: "Mobile radio interface layer 3 specification; Core Network Protocols Stage3".
[9] 3GPP TS 29.002: "Mobile Application Part (MAP) specification".
[10] ETSI ETS 300 358: "ISDN Completion of Calls to Busy Subscriber (CCBS) supplementary service; Functional capabilities and information flows".
3 Definitions and abbreviations
3.1 Definitions Destination B: The entity addressed in the original call set up, which is busy when first called by subscriber A. Similarly, MSC B, VLR B and HLR B are the network elements pertaining to Destination B when Destination B is a GSM mobile.
Originating queue: The queue that manages CCBS requests for a subscriber, when that subscriber is the originator of those CCBS Requests.
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SSAP: Supplementary Service Application Part. SSAP is the protocol used for CCBS procedures on the interface between the originating and destination network. Communication across this interface is performed using SCCP Connectionless Signalling (Refer to ETS 300 358).
Subscriber A: The user of MS A, requesting CCBS. Similarly, MSC A, VLR A and HLR A are the network elements pertaining to Subscriber A.
Subscriber B: The user of destination B, who may not necessarily subscribe to CCBS.
Subscriber C: The user of MS C, who is the forwarded-to-party when call forwarding applies. Similarly, MSC C, VLR C and HLR C are the network elements pertaining to Subscriber C.
Target queue: The queue that manages CCBS requests for a subscriber, when that subscriber is the target of CCBS Requests.
Timers: For each of the service timers, the location, start and stop conditions and action on expiry are given - Refer to subclause 5.1.
3.2 Abbreviations Abbreviations used in this specification are listed in TR 21.905.
4 General
4.1 Overview The CCBS service allows a calling subscriber A, encountering a NDUB destination B, to be notified when destination B becomes idle and to have the network automatically generate a CCBS call to destination B, if subscriber A desires. Subscriber A may make distinct CCBS requests for calls to the same destination B for different basic services.
4.2 Architecture Figure 4.2.1 is an architectural overview of the CCBS service when interworking between the originating and the destination networks involved. The originating network may be a mobile network or a fixed network and the destination network may also be a mobile network or a fixed network.
The call related signalling for CCBS is performed on ISUP links on the following interfaces:
VMSC A - GMSC B;
VMSC A - DLE;
OLE - GMSC B;
whereas the specific CCBS procedures are performed via the SSAP protocol, which is signalled on the following interfaces:
HLR A - HLR B;
HLR A - DLE;
OLE - HLR B.
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3GPP TS 23.093 V3.2.0 (2000-09)8Release 1999
ISUP
ISUP ISUP
ISUP
SSAP
SSAP
SSAP
SSAPOLE
VMSC A
VLR A
HLR A
GMSC B
DLE
VMSC B
VLR B
HLR B
ISUP
TRANSITNETWORK(S)
Originating Network Destination Network
FixedNetwork
FixedNetwork
MobileNetwork
MobileNetwork
MAP
Figure 4.2.1: Architectural overview showing common point of interworking
4.2.1 Architectural overview during roaming Either the originating subscriber A or the destination subscriber B or both may be located outside of their HPLMNs during the CCBS service. When all the involved networks support CCBS service the normal handling described in this specification applies. When some network entities do not support CCBS service refer to clause 10 where the exceptions are described in more detail.
The signalling between different networks described in the subclause 4.2 applies also during roaming. HLR A and HLR B belongs always to the HPLMN of the subscriber whereas VLR A and MSC A and GMSC, VLR B and MSC B respectively may belong to a HPLMN or VPLMN. Refer to TS 23.018 where call handling in the mobile network is described in more detail.
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3GPP TS 23.093 V3.2.0 (2000-09)9Release 1999
5 Handling of completion of calls to busy subscriber Registration and erasure of CCBS are not applicable. Activation and Invocation of CCBS are intrinsic parts of the operation of the service, and are described in this section.
5.1 CCBS Timers The timers used to control the operation of CCBS can be considered to consist of two groups i.e. the timers which operate on a per subscriber basis (see table 1) and the service duration timers (T3 and T7) which operate on a per CCBS Request basis (see table 2).
Table 1: CCBS Service Timers
Timer Name Value Run At Started Stopped Expiry
T1 Retention >15s MSC A Busy (CCBS Possible) sent to MS A
CCBS Request received from MS A
Discard retained information
T4 Recall 20-30s MSC A CCBS Recall sent to MS A and MS A is idle
Subscriber A initiates CCBS setup or rejects CCBS Recall
Cancel request
T8 Destination idle guard
0-15s HLR B Event Report received from VLR B indicating destination B is idle
Event Report received from VLR B indicating destination B is no longer idle
Inform originating network that Destination B is free
T9 Recall B 40-55s HLR B Remote User Free sent to the A-side
Request cancelled, completed or suspended
Cancel request
T10 CCBS notification
20-30s MSC A CCBS Recall sent to MS A and MS A is not idle
Subscriber A initiates CCBS setup, rejects CCBS Recall or requests suspension
Suspend request
T11 CCBS resume 20-25s HLR A HLR A receives a resume request and there are more than one suspended request in subscriber A’s queue
Remote User Free received from destination network
Resume next suspended request in queue
T12 CCBS Call Guard
20-30s HLRA HLRA receives a CCBS RUF Ack and starts to wait CCBS Call Report
CCBS Call Report received
Cancel request
Table 2: Service Duration Timers
Timer Name Value Run At Started Stopped Expiry
T3 Originating service duration
15-45m HLR A Acknowledgement to CCBS Request received from destination network
Request cancelled or completed
Cancel request
T7 Terminating service duration
>45m HLR B HLR B acknowledges successful activation of a CCBS Request
Request cancelled or completed
Cancel request
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)10Release 1999
5.2 Information flows Figures 5.2.1 and 5.2.2 show the flow of information between network elements for a mobile to mobile call for the following:
Figure 5.2.1: Successful CCBS request, destination B busy when request made, subscriber A free when destination B becomes free.
Figure 5.2.2: Subscriber A is not idle when destination B becomes free.
Figures 5.2.3 and 5.2.4 show the flow of information between network elements for a mobile to fixed call for the same situations described in figures 5.2.1 and 5.2.2 respectively.
Each information flow diagram has been divided where appropriate into four distinct phases of operation. These are as follows:
(1) Pre-conditions (Initial Call encountering NDUB and CCBS possible in the destination network). The detailed description of the basic call handling can be found in TS 23.018;
(2) Activation;
(3) Invocation;
(4) Operation (CCBS Call Set-up).
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3GPP TS 23.093 V3.2.0 (2000-09)11Release 1999
Start ReportingAck
MS (A) MSC/VLR (A) HLR (A) GMSC HLR (B) MSC (B)
Set-upIAM
Info ReqPRN
MSRNInfo Req Ack
IAM
RELEASE (Busy, CCBS Possible)RELEASE (Busy, CCBS Possible)
CCBS Poss
CCBS RequestCCBS Request
CCBS Request
CCBS Request Ack
CCBS RequestAckCCBS Request
Ack
Start Reporting
Event Report(Idle & Reachable)
Remote User FreeCCBS RUF
CCBS Recall
CCBS Set-up
IAM (CCBS Call)Info Req(CCBS Call)
PRN(CCBS Call)
PRN AckInfo Req Ack
IAM (CCBS Call)
ACM/ANM/CPGACM/ANM/CPG
Alert/Connect
TC-END
CCBSCall ReportCCBS Call
Report(Success)
T1:
:T1
T3 T7:
:
T9
:
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T7
:
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T3
:
T4:
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:T4
Release
T8
T8:
:
T9
Set-up
Stop Reporting
:
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1
2
3
4
CCBS RUF Ack:
:
CCBS Call Info
CCBS Call Info Ack
Figure 5.2.1: Successful CCBS request. Destination B busy when request activated, subscriber A free when destination B becomes free (mobile-to-mobile)
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3GPP TS 23.093 V3.2.0 (2000-09)12Release 1999
Start ReportingAck
Start ReportingAck
MS (A) MSC/VLR (A) HLR (A) GMSC HLR (B) MSC (B)
Set-upIAM
Info ReqPRN
MSRNInfo Req Ack
IAM
RELEASE (Busy, CCBS Possible)RELEASE (Busy, CCBS Possible)
CCBS Poss
CCBS RequestCCBS Request
CCBS Request
CCBS Request Ack
CCBS RequestAckCCBS Request
Ack
Start Reporting
Event Report(Idle & Reachable)Remote User Free
CCBS RUF
CCBS Recall
T1:
:T1
T3 T7:
:
T9
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Release
T8
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T8
T10
CCBS RUF AckT10 Expires
CCBS SuspendT9
Note: T3 & T7 are not stoppedMS (A) becomes
idle Event Report(Idle & Reach) CCBS Resume
:::
Note 1 : Stop Reporting is sent if there are only suspended requests in the queue
1
2
3
Stop Reporting
Start Reporting
(Note 1)
(Note 2)
Note 2 : Start Reporting is sent if MSC B is not monitoring destination B
Start Reporting Ack
Start Reporting
CCBS Call Info
CCBS Call Info Ack
Figure 5.2.2: Subscriber A not idle when destination B becomes free (mobile-to-mobile); Processing of a single request
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3GPP TS 23.093 V3.2.0 (2000-09)13Release 1999
CCBS RUFAck
CCBS RUF
MS (A) MSC/VLR (A) HLR (A) DLE (B)
Set-upIAM
RELEASE (Busy, CCBS Possible)
CCBS Poss
CCBS Request
CCBS RequestCCBS Request
CCBS Request Ack
CCBS RequestAck
CCBS Request Ack Remote User Free
CCBS Recall
T1:
:T1
T3
:
:
Release
T4
::::::::::
CCBS Set-up
IAM (CCBS Call)
ACM/ANM/CPG
TC-ENDCCBS CallReport (success)
T3
T4
2
1
3
4
:::
Alert/Connect
CCBS Call Info
CCBS Call Info Ack
Figure 5.2.3: Successful CCBS request. Destination B busy when request activated, subscriber A free when destination B becomes free (mobile-to-fixed)
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3GPP TS 23.093 V3.2.0 (2000-09)14Release 1999
Start ReportingAck
Start Reporting
MS (A) MSC/VLR (A) HLR (A) DLE (B)
Set-upIAM
RELEASE (Busy, CCBS Possible)
CCBS Poss
CCBS Request
CCBS RequestCCBS Request
CCBS Request Ack
CCBS RequestAck
CCBS Request Ack Remote User Free
CCBS RUF
CCBS Recall
T1:
:T1
T3
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Release
T10
T10 ExpiresCCBS Suspend
Note: T3 & T7 are not stopped
MS (A) becomesidle Event Report
(Idle&Reach)CCBS Resume
::
1
2
3
CCBS RUF Ack
CCBS Call Info
CCBS Call Info Ack
Figure 5.2.4: Subscriber A not idle when destination B becomes free (mobile-to-fixed)
5.3 Activation Activation of a CCBS Request is carried out by subscriber A. VLR A is considered to be transparent during the activation operation.
The information flows shown in figures 5.2.1 to 5.2.4 inclusive show the information flow for the activation process.
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3GPP TS 23.093 V3.2.0 (2000-09)15Release 1999
5.4 Deactivation Subscriber A may deactivate CCBS in any of the following ways:
- Deactivate all outstanding CCBS requests; or
- Deactivate a specific CCBS Request.
The different deactivation operations are identified by different MMI commands as specified in TS 22.030.
Deactivation of CCBS requests by subscriber A shall be performed at HLR A.
To deactivate all outstanding CCBS requests, the Deactivate CCBS operation request shall contain the SS-Code only.
To deactivate a specific CCBS request, the Deactivate CCBS operation request shall contain the following parameters:
- SS-Code;
- CCBS Index.
On receipt of the deactivation request, HLR A shall cancel the CCBS request, i.e. remove all record of a CCBS request from the subscriber A’s originating CCBS queue and instruct the destination B network to cancel the corresponding CCBS request in the destination CCBS queue of subscriber B. HLR A shall return a result indicating whether the deactivation attempt was successful or not.
MS A MSC A VLR A HLR A Destination B Network
Deactivate CCBS
------------------->
Deactivate CCBS
--------------------->
Deactivate CCBS
------------------->
CCBS Cancel
------------------->
(note)
Acknowledge
<-------------------
Acknowledge
<--------------------
Acknowledge
<---------------------
NOTE: CCBS Cancel shall be sent for each CCBS Request that is cancelled in HLR A.
Figure 5.4.1: Successful deactivation of all CCBS Requests/a specific CCBS request
NOTE: In the case where a subscriber attempts to perform a deactivation operation but the subscriber is not provisioned with the CCBS service then, the subscriber shall receive an indication that the CCBS service is not provisioned for him.
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3GPP TS 23.093 V3.2.0 (2000-09)16Release 1999
5.5 Interrogation Interrogation of CCBS shall be carried by request to HLR A. HLR A then returns the required information or error to MS A, see figure 5.5.1. MSC A and VLR A are considered to be transparent during the interrogation operation.
MS A MSC A VLR A HLR A
Interrogate CCBS
------------------------------>
Interrogate CCBS
----------------------------->
Interrogate CCBS
------------------------------->
Acknowledge
<-------------------------------
Acknowledge
<-----------------------------
Acknowledge
<--------------------------------
Figure 5.5.1: General interrogation of completion of calls to busy subscriber
The Interrogate CCBS operation request shall contain the SS-Code only.
In response to a general interrogation, MS A shall be given the AddressOfB, BasicServiceCode and CCBS index for each CCBS Request in the queue. The entries shall be ordered in the chronological order, the oldest entry shall be presented first.
If there are no CCBS Requests in the queue, MS A shall be given an indication that no entries exist in the queue.
NOTE: In the case where a subscriber attempts to perform an interrogation operation but the subscriber is not provisioned with the CCBS service then, the subscriber shall receive an indication that the CCBS service is not provisioned for him.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)17Release 1999
5.6 Messages and their contents This clause contains the detailed description of the information flows used by CCBS.
Each Information Element, IE is marked as (M) Mandatory, (C) Conditional or (O) Optional. A mandatory information element shall always be present. A conditional information shall be present if certain conditions are fulfilled; if those conditions are not fulfilled it shall be absent. An optional information element may be present or absent, at the discretion of the application at the sending entity. This categorisation is a functional classification, i.e., stage 2 information and not a stage 3 classifications to be used for the protocol.
The stage 2 and stage 3 message and information element names are not necessarily identical.
5.6.1 Information elements used in the messages In this clause constructed information elements are described.
5.6.1.1 Call Information information element
Call Information information element is formed in the MSC A during the CCBS activation. This information element contains unmodified copy of the SETUP message received from the MS A. If CCBS Request is activated, the Call Information is stored in the HLR A. During CCBS Recall Call Information is relayed back to the MS. Refer to SETUP Container information element defined in TS 24.008.
5.6.1.2 AddressOfB information element
AddressOfB information element is formed in the MSC A during the CCBS activation. It contains the number of the destination B dialled by the A-user.
Table 5.6.1.2: Structure of AddressOfB information element
Parent Information Element
Child Information element name
Information element
Required
Information element description
AddressOfB B subscriber number, B subscriber subaddress
M C
The number of the destination B dialled by the A-user; Shall be present if it was dialled by the A-user; otherwise shall be absent
5.6.1.3 CCBS Description information element
CCBS Description information element is formed in the HLR A during the CCBS activation.
Table 5.6.1.3: Structure of CCBS Description information element
Parent Information Element
Child Information element name
Information element
Required
Information element description
CCBS Description CCBS Index, AddressOfB,
BasicServiceGroup
M M M
CCBS Index (range 1 - 5) identifies the request in the network. The structure of the AddressOfB is defined in table 5.6.1.2; BasicServiceGroup related to the original call.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)18Release 1999
5.6.2 Messages between MS and MSC These messages are used in the originating network.
Table 5.6.2: Messages between MS and MSC
Message Message sender
Information element name
Information element
Required
Information element description
CCBS POSSIBLE MSC - - This message contains no information elements. CCBS REQUEST MS - - This message contains no information elements. CCBS REQUEST
ACK MSC CCBS Index,
AddressOfB,
BasicServiceGroup
M
O
O
CCBS Index (range 1 - 5) identifies the request in the network. The structure of the AddressOfB is defined in table 5.6.1.2 BasicServiceGroup related to the original call.
CCBS REQUEST ERROR
MSC Error M The information element can take the following values: - Short term denial - Long term denial
DEACTIVATE CCBS MS CCBS Index C If CCBS Index is present the corresponding request shall be deleted, otherwise all requests shall be deleted.
DEACTIVATE CCBS ACK
MSC DeactivateResult M The information element can take the following values: - Success - Not Provisioned
INTERROGATE CCBS
MS - - This message contains no information elements.
INTERROGATE CCBS ACK
MSC List(1-5) of CCBS Description; No Entries;
Not Provisioned
C
C C
The list shall contain one entry for each CCBS Request for which the HLR stores data or; the queue is empty or; CCBS is not provisioned for the subscriber Exactly one of these information elements shall be present. The structure of the CCBS Description is defined in table 5.6.1.3.
CCBS CALL INFO MSC Call Information M The content of the Call Information is defined in the subclause 5.6.1.1.
CCBS CALL INFO ACK
MS GSM BC M GSM BC indicates the BC the MS prefers to use. The network may allocate a traffic channel accordingly.
CCBS CALL INFO ERROR
MS Error M The information element can take the following values: - Incompatible Terminal
CCBS RECALL MSC CCBS Description,
Alerting Pattern
M,
C
The structure of the CCBS Description is defined in table 5.6.1.3. Alerting Pattern shall be present if it was received in the CCBS RUF message
CCBS SETUP MS - - The content of the message is the same as the MO Set-up message has. Refer to TS 24.008.
CCBS RECALL REJECT
MS Cause M The MS shall indicate the reason of CCBS Recall rejection. The information element can take the following values: - Recall Rejected by the user - UDUB - ACMmax exceeded
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)19Release 1999
5.6.3 Messages between MSC and VLR (B-interface)
5.6.3.1 Messages between MSC and VLR in the originating network
These messages are used in the originating network. Some messages are used also in the terminating network. They are marked accordingly.
Table 5.6.3.1: Messages between MSC and VLR in the originating network
Message Message sender
Information element name
Information element
Required
Information element description
CALL END MSC - - This message contains no information elements. The message is used also in the terminating network.
CCBS CALL DELIVERY
MSC Outcome M The information element indicates whether CCBS Call was successful or failure. It can take the following values: - Success; - Failure; - NDUB; - Busy; - Absent Subscriber.. The message is used also in the terminating network.
CCBS REQUEST MSC - - This message contains no information elements CCBS REQUEST
ACK VLR CCBS Index,
AddressOfB,
BasicServiceGroup
M
O
O
CCBS Index (range 1 - 5) identifies the request in the network. The structure of the AddressOfB is defined in table 5.6.1.2 BasicServiceGroup related to the original call.
CCBS REQUEST ERROR
VLR Error M The information element can take the following values: - Short term denial; - Long term denial.
COMPLETE RECALL
VLR Call Information M The content of the Call Information is defined in the subclause 5.6.1.1.
COMPLETE RECALL ACK
MSC - - This message contains no information elements
COMPLETE RECALL NEGATIVE
RESPONSE
MSC Negative Response M The negative information element can take the following values: - Absent Subscriber; - Incompatible Terminal; - Radio Congestion.
DEACTIVATE CCBS MSC CCBS Index C If CCBS Index is present the corresponding request shall be deleted, otherwise all requests shall be deleted.
DEACTIVATE CCBS ACK
VLR DeactivateResult M The information element can take the following values: - Success; - Not Provisioned.
INTERROGATE CCBS
MSC - - This message contains no information elements
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3GPP TS 23.093 V3.2.0 (2000-09)20Release 1999
Table 5.6.3.1: Messages between MSC and VLR in the originating network, cont.
Message Message sender
Information element name
Information element
Required
Information element description
INTERROGATE CCBS ACK
VLR List(1-5) of CCBS Description; No Entries;
Not Provisioned
C
C
C
The list shall contain one entry for each CCBS Request for which the HLR stores data; or the queue is empty; or CCBS is not provisioned for the subscriber. Exactly one of these information elements shall be present. The structure of the CCBS Description is defined in table 5.6.1.3.
NOT IDLE MSC - - This message contains no information elements. The message is used also in the terminating network.
PAGE MS FOR RECALL
VLR Location area ID,
TMSI
M
O
Location area in which the MS is to be paged TMSI to be broadcast to identify the MS
PAGE MS FOR RECALL NEGATIVE
RESPONSE
MSC Negative Response M The negative information element can take the following values: - Unknown LAI; - Absent Subscriber; - Busy Subscriber.
PROCESS ACCESS REQUEST
MSC - - Refer to TS 23.018
RADIO FAILURE MSC - - This message contains no information elements. The message is used also in the terminating network.
RECALL VLR CCBS Description
Alerting Pattern
M
C
The structure of the CCBS Description is defined in table 5.6.1.3. Alerting Pattern shall be present if it was received in the CCBS RUF message
RECALL ACK MSC Cause M The information element can take the following values: - Accept; - Rejected; - T4 Expiry; - T10 Expiry; - Radio Failure; - UDUB, busy; - UDUB, idle; - Incompatible terminal.
SEARCH FOR MS MSC FOR RECALL
VLR - - This message contains no information elements
SEARCH FOR MS MSC FOR RECALL
ACK
MSC - - This message contains no information elements
SEARCH FOR MS MSC FOR RECALL
NEGATIVE RESPONSE
MSC Negative Response M The negative information element can take the following values: - Absent Subscriber; - Busy Subscriber;
SEND INFO FOR OUTGOING CALL
MSC - - Refer to TS 23.018
START STATUS ENQUIRY
VLR - - This message contains no information elements. The message is used also in the terminating network.
STATUS ENQUIRY RESULT
MSC Status M The information element can take the following vales: - CCBS Idle; - CCBS Not Idle. The message is used also in the terminating network.
STOP STATUS ENQUIRY
VLR - - This message contains no information elements. The message is used also in the terminating network.
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3GPP TS 23.093 V3.2.0 (2000-09)21Release 1999
5.6.3.2 Messages between MSC and VLR in the destination network
These messages are used in the destination network. Some messages are used also in the originating network. They are marked accordingly.
Table 5.6.3.2: Messages between MSC and VLR in the destination network
Message Message sender
Information element name
Information element
Required
Information element description
CALL END MSC - - Refer to table 5.6.3.1 CCBS CALL DELIVERY
MSC - - Refer to table 5.6.3.1
START STATUS ENQUIRY
VLR - - Refer to table 5.6.3.1
STATUS ENQUIRY RESULT
MSC - - Refer to table 5.6.3.1
STOP STATUS ENQUIRY
VLR - - Refer to table 5.6.3.1
RADIO FAILURE MSC - - Refer to table 5.6.3.1 NOT IDLE MSC - - Refer to table 5.6.3.1
COMPLETE CALL VLR -
Indicator
-
C
Refer to TS 23.018 In addition: The information element shall be present if the call is CCBS Call; otherwise it shall be absent.
PROCESS CALL WAITING
VLR -
Indicator
-
C
Refer to TS 23.018 In addition: The information element shall be present if the call is CCBS Call; otherwise it shall be absent.
SEND INFO FOR INCOMING CALL
ACK
VLR -
CCBS Target
-
C
Refer to TS 23.018 In addition: The information element shall be present if the B subscriber can be target of CCBS request; otherwise it shall be absent.
SEND INFO FOR INCOMING CALL
NEGATIVE RESPONSE
VLR -
CCBS Target
-
C
Refer to TS 23.018 In addition: The information element shall be present if the B subscriber can be target of CCBS request; otherwise it shall be absent.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)22Release 1999
5.6.4 Messages between VLR and HLR (D-interface)
5.6.4.1 Messages between VLR and HLR in the originating network
These messages are used between VLR - HLR in the originating network. Some messages are used also in the destination network. They are marked accordingly.
Table 5.6.4.1: Messages between VLR and HLR in the originating network
Message Message sender
Information element name
Information element
Required
Information element description
CCBS REQUEST VLR Call Information
ISDN BC
ISDN HLC
ISDN LLC
Presentation Indicator
Translated B No
CAMEL Invoked
Basic Service Group
AddressOfB
M
M
C
C
C
M
C
M
M
The content of the Call Information is defined in the subclause 5.6.1.1. ISDN BC derived for the initial call. Shall be present if ISDN HLC was present in the initial call; otherwise shall be absent. Shall be present if ISDN LLC was present in the initial call; otherwise shall be absent. Shall be present if CLIR was invoked for the initial call; otherwise shall be absent. The number used for routing purposes stored in international E.164 format. Shall be present if MO CAMEL was invoked in the initial call; otherwise shall be absent. GSM Elementary Basic Service Group which corresponds to the basic service used for initial call set-up The structure of the AddressOfB is defined in table 5.6.1.2
CCBS REQUEST ACK
HLR CCBS Index
AddressOfB
Basic Service Group
M
O
O
CCBS Index (range 1 - 5) identifies the request in the network. The structure of the AddressOfB is defined in table 5.6.1.2 BasicServiceGroup related to the original call.
CCBS REQUEST ERROR
HLR Error M The information element can take the following values: - Short term denial; - Long term denial;
CCBS RUF HLR Call Information
CCBS Description
Translated B No
Replace B No
Alerting Pattern
M
M
M
C
C
The content of the Call Information is defined in the subclause 5.6.1.1. The content of the CCBS Description is defined in table 5.6.1.3. The number used for routing purposes in international E.164 format. The information element shall be present if the HLR instructs the MSC to replace the destination B number with the translated B number; otherwise it shall be absent. Alerting Pattern shall be present if the HLR has determined an alerting category or an alerting level for the CCBS recall
CCBS RUF ACK VLR Result M The information element indicates whether CCBS Recall was accepted. It can take the following values: - RUF Accepted; - RUF Rejected; - T4 Expiry; - T10 Expiry; - UDUB, idle; - UDUB, busy.
CCBS RUF ERROR VLR Error M The information element indicates the reason why CCBS Recall could not be successfully delivered. It can take the following values: - IMSI Detached; - Restricted Area; - No Page Response; - Incompatible Terminal; - Absent Subscriber; - Radio Failure; - Ccomp Busy; - System Failure.
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3GPP TS 23.093 V3.2.0 (2000-09)23Release 1999
Table 5.6.4.1: Messages between VLR and HLR in the originating network, cont.
Message Message sender
Information element name
Information element
Required
Information element description
EVENT REPORT VLR Status M The information element contains subscriber status. It can take the following values: - CCBS Idle; - CCBS Not Idle; - CCBS Not Reachable. The message is used also in the terminating network.
EVENT REPORT ACK
HLR - - This message contains no information elements The message is used also in the terminating network.
EVENT_REPORT_ ERROR
HLR Error M The information element contains no application specific error values. The message is used also in the terminating network.
START REPORTING HLR - - This message contains no information elements. The message is used also in the terminating network.
START REPORTING ACK
VLR Status M The information element contains subscriber status. It can take the following values: - CCBS Idle; - CCBS Not Idle; - CCBS Not Reachable. The message is used also in the terminating network.
START REPORTING ERROR
VLR Error M The information element contains no application specific error values. The message is used also in the terminating network.
CONTINUE MONITORING
HLR - - This message contains no information elements. The message is used also in the terminating network.
STOP REPORTING HLR - - This message contains no information elements. The message is used also in the terminating network.
CCBS CALL REPORT
VLR Mode
Outcome
Status
M
M
C
The information element indicates the reporting mode. It can take the following values : - A; - B. The information element indicates the outcome of the CCBS Call. It can take the following values: - Success; - Busy (only for mode A); - NDUB (only for mode B) - Failure. The information element contains subscriber status. It is set only for mode B. It can take the following values: - CCBS Idle; - CCBS Not Idle; - CCBS Not Reachable. The message is used also in the terminating network.
CCBS CALL REPORT ACK
HLR - - This message contains no information elements. The message is used also in the terminating network.
CCBS CALL REPORT ERROR
HLR Error M The information element contains no application specific error values. The message is used also in the terminating network.
DEACTIVATE CCBS VLR CCBS Index C If CCBS Index is present the corresponding request shall be deleted, otherwise all requests shall be deleted.
DEACTIVATE CCBS ACK
HLR DeactivateResult M The information element can take the following values: - Success; - Not Provisioned.
DEACTIVATE CCBS ERROR
HLR Error M The information element contains no application specific error values.
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3GPP TS 23.093 V3.2.0 (2000-09)24Release 1999
Table 5.6.4.1: Messages between VLR and HLR in the originating network, cont.
Message Message sender
Information element name
Information element
Required
Information element description
INTERROGATE CCBS
VLR - - This message contains no information elements.
INTERROGATE CCBS ACK
HLR List(1-5) of CCBS Description; No Entries;
Not Provisioned
C
C
C
The list shall contain one entry for each CCBS Request for which the HLR stores data or; the queue is empty or; CCBS is not provisioned for the subscriber. Exactly one of these information elements shall be present. The structure of the CCBS Description is defined in table 5.6.1.3.
INTERROGATE CCBS ERROR
HLR Error M The information element contains no application specific error values.
5.6.4.2 Messages between VLR and HLR in the destination network
These messages are used between VLR - HLR in the destination network. Some messages are used also in the originating network. They are marked accordingly.
Table 5.6.4.2: Messages between VLR and HLR in the destination network
Message Message sender
Information element name
Information element
Required
Information element description
EVENT REPORT VLR - - Refer to table 5.6.4.1 EVENT REPORT
ACK HLR - - Refer to table 5.6.4.1
EVENT REPORT ERROR
HLR - - Refer to table 5.6.4.1
START REPORTING HLR - - Refer to table 5.6.4.1 START REPORTING
ACK VLR - - Refer to table 5.6.4.1
START REPORTING ERROR
VLR - - Refer to table 5.6.4.1
CONTINUE MONITORING
HLR - - Refer to table 5.6.4.1
STOP REPORTING HLR - - Refer to table 5.6.4.1 CCBS CALL
REPORT VLR - - Refer to table 5.6.4.1
CCBS CALL REPORT ACK
HLR - - Refer to table 5.6.4.1
CCBS CALL REPORT ERROR
HLR - - Refer to table 5.6.4.1
PROVIDE ROAMING NUMBER
HLR -
CCBS Call Reporting Request
-
C
Refer to TS 23.018 In addition: The information element shall be present for CCBS Call roaming number enquiry; otherwise it shall be absent.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)25Release 1999
5.6.5 Messages between MSC and HLR (C-interface)
Table 5.6.5: Messages between MSC and HLR
Message Message sender
Information element name
Information element
Required
Information element description
SEND ROUTING INFO
MSC -
CCBS Supported
CCBS Call Indicator
-
C
C
Refer to TS 23.018 In addition: The information element shall be present if GMSC supports CCBS; otherwise it shall be absent. The information element shall be present, if SRI is for CCBS Call; otherwise it shall be absent.
SEND ROUTING INFO_ACK
HLR -
CCBS Target
Keep CCBS Call Indicator
-
C
C
Refer to TS 23.018 In addition: The information element shall be present if the call is forwarded on busy and the subscriber B can be target of CCBS requests; otherwise it shall be absent. The information element shall be present if the VMSC supports CCBS and SRI enquiry was for CCBS Call; otherwise it shall be absent.
SEND ROUTING INFO NEGATIVE
RESPONSE
HLR -
Negative Response
- -
Refer to TS 23.018 New value(s) for existing parameter(s): - Busy_CCBS_Possible; - Busy_CCBS_Not_Possible.
5.6.6 Messages between MSC - MSC (E-interface)
Table 5.6.6: Messages between MSC and MSC
Message Message sender
Information element name
Information element
Required
Information element description
RESUME CALL HANDLING
MSC -
CCBS Target
-
C
Refer to TS 23.079 In addition: The information element shall be present if the call is forwarded on busy and the subscriber B can be target of CCBS requests; otherwise it shall be absent.
5.6.7 Existing parameters containing CCBS specific information Mobile Station Classmark 2 (refer to TS 24.008 contains information whether “Network initiated MO CM connection request” is supported or not. This information is vital for the recall mechanism.
CC capabilities (refer to TS 24.008) contains information whether “Prolonged Clearing Procedures” are supported or not. This information is vital for the activation mechanism.
SS-Code and SS-Status (refer to TS 29.002) contains information whether CCBS service is provisioned to the subscriber. Both originating and destination CCBS service have their own SS-Code.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)26Release 1999
6 Monitoring and CCBS Call Reporting
6.1 Monitoring
6.1.1 Overview Monitoring is the process where the subscriber state is observed and reported. When monitoring is started, the current subscriber state is reported and any subsequent changes of subscriber state are reported until monitoring is stopped.
Monitoring subscriber state information will be necessary against MS B and may also be necessary against MS A.
For both these cases the monitoring functionality is located in the appropriate serving VMSC/VLR and is controlled from the appropriate HLR. The actions on the A-side and B-side for monitoring are completely independent and the following description is generic to cover either case. The HLR sends an explicit Start Reporting signal to the VLR to initiate monitoring. The VLR acknowledges the request confirming that monitoring has started and indicates the current status of the subscriber state in the VMSC/VLR. The VLR will continue to send an Event Report to the HLR whenever the appropriate subscriber state transition event occurs. The HLR sends an explicit Stop Reporting signal to the VLR when reporting on the subscriber state transitions is no longer required.
6.1.2 Monitoring Subscriber B-state information The CCBS service requires monitoring of the subscriber state at the called destination network (B-side). This monitoring enables the HLR B to be aware of any transition of subscriber state in VMSC/VLR B while there is an active CCBS Request in the HLR B queue. The basic service operation is that, when the destination B subscriber state becomes Idle, the HLR B is informed and a Remote User Free indication is sent towards the originating A network at the appropriate time. If subsequently to that event the destination B subscriber state becomes not Idle or not reachable, then the HLR B is informed by the VMSC/VLR B in order that it can take an appropriate action towards HLR A, e.g. defer sending of the Remote User Free indication.
6.1.3 Monitoring Subscriber A state information: Monitoring Subscriber A state information will be necessary if the Remote User Free indication from Destination B network cannot be acted upon because e.g. MS A is not idle or not reachable and leads to the CCBS request being suspended. The service action in this event is that, when the subscriber state subsequently becomes Idle, the HLR A is informed and a Resume indication is sent towards the destination B network at the appropriate time.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)27Release 1999
6.2 MSC/VLR Monitoring Model The Monitoring model represents the information related to the status of the subscriber connection in the MSC/VLR. A generic monitoring model is used in the MSC/VLR covering the needs of both subscriber A and subscriber B state information for CCBS. The MSC/VLR monitoring model for CCBS is shown in figure 6.2.1. Note that state transitions reported to the HLR are shown as solid lines.
NOT IDLENOT
REACHABLE
IDLE
Figure 6.2.1: MSC/VLR Monitoring Model
6.2.1 Subscriber status The monitoring model in the MSC/VLR makes use of the three subscriber states described in table 6.2.1.
NOTE: Refer to TS 23.078 for equivalent subscriber state description.
Table 6.2.1: Subscriber States
Subscriber states Description (for monitoring purposes) Notes
IDLE The state of the MS is neither "NOT IDLE" nor "NOT REACHABLE"
"Assumed Idle"
NOT IDLE The MS is engaged on a transaction for a MO or MT circuit switched call
"CAMEL busy"
NOT REACHABLE The MSC/VLR can determine from its internal data that the MS is not reachable e.g. IMSI detached, Restricted Area, No Page Response.
"Network Determined Not Reachable"
For each subscriber state a description can be found on the entry events, functions and exit events.
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3GPP TS 23.093 V3.2.0 (2000-09)28Release 1999
6.2.1.1 Idle
Entry events:
- Indication of last call released (Mobile Originated or Mobile Terminated);
- Indication of radio link failure;
- Indication of MS activity related to e.g. MO-SMS, MT-SMS and CISS;
- IMSI Attached;
- Location Update.
Functions:
- Events leading to a transition to the Not Idle or Not Reachable subscriber state are awaited.
Exit events:
- A Mobile Originated Set-up message is received from the MS for first (and only) call;
- A Mobile Terminated Set-up message is sent to the MS for first (and only) call.
- IMSI Detached;
- Roaming in LA not allowed;
- No Page Response;
- An exception condition is encountered e.g. Cancel Location indication received.
6.2.1.2 Not Idle
Entry events:
- A Mobile Originated Set-up message is received from the MS for first (and only) call;
- A Mobile Terminated Set-up message is sent to the MS for first (and only) call.
Functions:
- Events leading to a transition to the Idle or Not Reachable subscriber state are awaited.
Exit events:
- Indication of last call released (Mobile Originated or Mobile Terminated);
- Indication of radio link failure;
- An exception condition is encountered e.g. Cancel Location indication received.
6.2.1.3 Not Reachable
Entry events:
- IMSI Detached;
- Roaming in LA not allowed;
- No Page Response.
Functions:
- Events leading to a transition to the Idle or Not Idle subscriber state are awaited.
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3GPP TS 23.093 V3.2.0 (2000-09)29Release 1999
Exit events:
- Indication of MS activity related to e.g. MO-SMS, MT-SMS and CISS;
- IMSI Attached;
- Location Update;
- A Mobile Originated Set-up message is received from the MS for first (and only) call;
- A Mobile Terminated Set-up message is sent to the MS for first (and only) call;
- An exception condition is encountered e.g. Cancel Location indication received.
6.2.2 Reporting of subscriber state transitions Transitions between subscriber states are reported from the MSC/VLR, while monitoring in the MSC/VLR is on going. The table 6.2.2 indicates which transitions are monitored in the MSC/VLR and whether these are reported to the HLR for the CCBS service. An appropriate Event Report signal is sent from the VLR to the HLR when a relevant state transition occurs. The Event Report signal includes a status parameter which reflects the subscriber state information.
Table 6.2.2: Reporting of Subscriber States Transitions
Subscriber state transition event Event reporting HLR informed
Event report Subscriber status
IDLE to NOT IDLE Yes CCBS Not Idle
IDLE to NOT REACHABLE Yes CCBS Not Reachable
NOT IDLE to IDLE Yes CCBS Idle
NOT IDLE to NOT REACHABLE No -
NOT REACHABLE to IDLE Yes CCBS Idle
NOT REACHABLE to NOT IDLE No -
6.2.2.1 Start Reporting of Monitoring Events
When a Start Reporting signal is received from the HLR, the VLR shall acknowledge the request confirming that monitoring has started and indicate the current status of the subscriber state in the MSC/VLR. The VLR shall subsequently continue to send the Event Reports indicated in table 6.2.2 whenever the appropriate subscriber state transition event occurs.
Note where a single user has a CCBS request activated against him and has an outstanding CCBS request suspended against someone else, (i.e. is effectively both destination B and CCBS subscriber A) reporting on both A-side and B-side is required. In this case, the VLR shall only send a single Event Report as indicated in table 6.2.2 whenever the appropriate subscriber state transition event occurs. The HLR shall not send another Start Reporting signal to the VLR if monitoring is already ongoing in the MSC/VLR for either A-side or the B-side.
6.2.2.2 Stop Reporting of Monitoring Events
When a Stop Reporting signal is received from the HLR, the VLR shall stop sending the Event Reports.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)30Release 1999
6.3 CCBS Call Reporting
6.3.1 Overview As well as monitoring of the subscriber state, it is also necessary to report the result of the CCBS Call. The basic reporting requirements are as follows from both the A-side and the B-side.
CCBS Call Reporting - A-side:
The CCBS service logic in the originating network HLR A requires a report on the outcome of the CCBS Call resulting from the acceptance of the CCBS Recall by Subscriber A. The VLR A sends a CCBS Call Report to the HLR A indicating the outcome of the CCBS call processing in MSC/VLR A when e.g. an address complete message (ACM) is received from the destination B network. CCBS Call Reporting on the A-side is completely independent of any monitoring of subscriber state information. The sending of CCBS Call Report is required even when there is no monitoring ongoing in the MSC/VLR.
CCBS Call Reporting- B-side:
The CCBS service logic in the destination network HLR B requires a report on the outcome of CCBS Call processing in the MSC/VLR B. The HLR B initiates the CCBS call outcome reporting in the VLR when the VLR is normally queried to provide routing information for mobile terminated calls (by including an CCBS indicator in the PRN message). The VLR B sends a CCBS Call Report to the HLR B indicating the outcome of the CCBS call processing and the new status of the subscriber state in the MSC/VLR B when e.g. MS B is alerted to the CCBS Call.
6.3.2 Originating Network (A-side) When a CCBS RUF signal is received by the VLR, CCBS processing in the MSC/VLR leads to a CCBS Recall signal being sent to the MS. When the response to the CCBS Recall is received, the VLR shall subsequently send a CCBS Call Report when the relevant processing for the outgoing CCBS call to the destination network is completed as shown in the SDLs for MSC/VLR A.
6.3.3 Destination Network (B-side) When an initiate CCBS Call Reporting Request signal (B-side) is received by the VLR in the Provide Roaming Number message, the VLR shall subsequently send a CCBS Call Report when the relevant processing of the incoming CCBS call is completed as shown in the SDLs for MSC/VLR B.
6.3.3.1 Interaction of Event Reporting and CCBS Call Report
Reporting on subscriber state transitions will be ongoing in the MSC/VLR B when a report on the CCBS call outcome is required.
When a subscriber state transition from IDLE to NOT IDLE occurs due to an incoming CCBS call, an Event Report shall not be sent. Instead, a CCBS Call Report (containing CCBS call outcome information and the status) shall be sent to the HLR B. After the CCBS Call Report has been sent, normal Event Reporting will continue i.e. the VLR shall subsequently send only the Event Reports indicated in table 6.2.2 when the next appropriate subscriber state transition event occurs.
6.4 Location Update The MS may roam to a new MSC/VLR area while monitoring is ongoing in the previous MSC/VLR. When the VLR receives a Cancel Location signal from the HLR due to normal mobility management procedures, any ongoing CCBS related activities associated with the subscriber shall cease.
If the A-side monitoring is ongoing when the HLR receives a Location Update request from the new VLR, the Location Update signal is considered to indicate that the subscriber state is idle and the appropriate CCBS process in the HLR is informed. The normal mobility management procedures will lead to a Cancel Location signal being sent to the old VLR causing the Event Reporting to stop.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)31Release 1999
If the B-side monitoring is ongoing when the HLR receives a Location Update request from the new VLR, the normal mobility management procedures are followed. On successful completion of Location Update procedure, the HLR shall send a Start Reporting signal to the new VLR. If during the handling of the normal Location Updating procedure, it is detected that the new MSC/VLR does not support CCBS, the HLR shall not send a Start Reporting signal to the new VLR.
NOTE: There is no impact to the MS due to CCBS monitoring, i.e. normal Location Update procedures apply.
7 Mobility The handling for CCBS specific mobility is described below.
7.1 Mobility during Activation In order to allow the activation of CCBS when the call is released, the CC connection towards the MS shall be kept, to avoid any problems of mobility with the MS A.
Therefore the MSC shall maintain the CC connection with the MS A while T1 is running and until either T1 expires or the MSC sends a CCBS REQUEST ACK or CCBS REQUEST ERROR to the MS. After MSC has sent CCBS REQUEST ACK or CCBS REQUEST ERROR, the MSC A shall release the CC connection with MS.
7.2 Number used within CCBS Call The activating MSC A shall store the originally dialled number in the Call Information container. The TranslatedBNo parameter shall contain destination B address stored in international E.164 format.
If the MS A is registered outside of the HPLMN during the initial call or when Remote_User_Free is received from the destination B network the HLR A may request the recall MSC A to change the number used for CCBS Call to the TranslatedBNo instead. Refer to the SDLs for originating MSC/VLR.
If CAMEL service was activated in the original call the HLR A shall not request to change the number used for the CCBS Call.
7.3 MS does Location Update CCBS does place extra requirements for the Location Update procedure in the HLR when MS is monitored. Refer to subclause 6.4.
7.4 Mobility during CCBS Call in the destination network If MS registers to non-supporting network special handling has to be applied. Refer to subclause 10.1.3.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)32Release 1999
8 Interaction with other supplementary services TS 22.093 specifies a number of interactions between CCBS and other supplementary services. Additional details of how these interactions apply are as follows.
8.1 Call forwarding unconditional (CFU) If a call to destination B is forwarded to subscriber C by CFU and MS C is NDUB, the GMSC shall inform MSC A that CCBS is not possible when it releases the call. Refer to Process MT_GMSC (see TS 23.018) for further details.
If destination B activates CFU after subscriber A has activated a CCBS Request against destination B, HLR B shall not process CCBS Requests in the queue which are related to the relevant Basic Service Group, except that T7 shall continue for each CCBS Request in the destination B queue. If T7 expires for a particular request, HLR B shall cancel the request, as described in the SDLs shown in figure 11.2.2.1.
If MSC B is monitoring MS B when CFU is activated by destination B and all the CCBS Requests in the destination B queue subsequently become "Active and Quiescent", then HLR B shall send “Stop Reporting” to MSC B. If destination B deactivates CFU resulting in one or more requests becoming "Active and Operative" in the destination B queue then, HLR B shall send “Start Reporting” to MSC B if monitoring is not already ongoing.
A CCBS Call shall be forwarded without the CCBS call Indicator.
8.2 Call forward on busy (CFB) If a call to destination B is forwarded to subscriber C by CFB and MS C is NDUB, the forwarding switch (GMSC or VMSC) shall inform MSC A that CCBS is possible when it releases the call. Refer to Process MT_GMSC or Process ICH_MSC (see TS 23.018) for further details.
If destination B activates CFB after subscriber A has activated a CCBS Request against destination B, HLR B shall continue to process CCBS Requests in the queue. If a CCBS Call subsequently arrives at MSC B and MS B is NDUB, a network provider option exists as to whether:
- the CCBS call shall be treated as when MS B is busy for the CCBS call, without CFB active; or
- the CCBS call shall be forwarded without the CCBS call Indicator.
8.3 Call forwarding on no reply (CFNRy) If a call to destination B is forwarded to subscriber C by CFNRy and MS C is NDUB, the forwarding switch (VMSC) shall inform MSC A that CCBS is not possible when it releases the call. Refer to Process MT_GMSC or Process ICH_MSC (see TS 23.018) for further details
If destination B activates CFNRy after subscriber A has activated a CCBS Request against destination B, HLR B shall continue to process CCBS Requests in the queue.
A CCBS call shall be forwarded without the CCBS call Indicator.
8.4 Call forwarding on MS not reachable (CFNRc) If a call to destination B is forwarded to subscriber C by CFNRc and MS C is NDUB, the forwarding switch (GMSC or VMSC) shall inform MSC A that CCBS is not possible when it releases the call. Refer to Process MT_GMSC or Process_ICH_MSC (see TS 23.018) for further details.
If destination B activates CFNRc after subscriber A has activated a CCBS Request against destination B, HLR B shall continue to process CCBS Requests in the queue.
The CCBS call shall be forwarded without the CCBS call Indicator.
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3GPP TS 23.093 V3.2.0 (2000-09)33Release 1999
8.5 Call Waiting (CW) No impact.
8.6 Multiparty service (MPTY) No impact.
8.7 Closed user group (CUG) No impact.
8.8 Advice Of Charge (AoC) If subscriber A accepts a "CCBS Recall" indication but ACMmax exceeds, then MSC A shall cancel the associated request and shall not establish the CCBS Call.
8.9 Barring of all outgoing calls (BAOC) If subscriber A accepts a "CCBS Recall" indication but MSC A detects that BAOC is active and operative, then MSC A shall cancel the associated request and shall not establish the CCBS Call.
8.10 Barring of outgoing international calls (BOIC) If subscriber A accepts a "CCBS Recall" indication but the CCBS Call would be an international call and MSC A detects that BOIC is active and operative, then MSC A shall cancel the associated request and shall not establish the CCBS Call.
8.11 Barring of outgoing international calls except those directed to the home PLMN country (BOIC-exHC)
If subscriber A accepts a "CCBS Recall" indication but the CCBS Call would be an international call except to the home PLMN country and MSC A detects that BOIC-exHC is active and operative, then MSC A shall cancel the associated request and shall not establish the CCBS Call.
8.12 Barring of all incoming calls (BAIC) If a CCBS Request arrives at HLR B and HLR B detects that BAIC is active and operative for the relevant Basic Service Group, then HLR B shall not accept the activation attempt and shall indicate short term denial in the response.
If MSC B is monitoring MS B when BAIC is activated by destination B then all the CCBS Requests in the destination B queue subsequently become "Active and Quiescent" and HLR B shall send "Stop Reporting" to MSC B. If destination B deactivates BAIC resulting in one or more requests becoming "Active and Operative" in the destination B queue then, HLR B shall send “Start Reporting” to MSC B if monitoring is not already ongoing.
If barring of all incoming calls becomes active and operative for a particular Basic Service Group for destination B, such that a CCBS call from subscriber A is not permitted, HLR B shall cancel the associated request related to the Basic Service Group and select the next non-suspended request in the queue for processing for other Basic Service Groups.
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3GPP TS 23.093 V3.2.0 (2000-09)34Release 1999
8.13 Barring of incoming calls when roaming outside the home PLMN country (BIC-Roam)
If a CCBS Request arrives at HLR B and HLR B detects that BIC-Roam is active and operative for the relevant Basic Service Group, then HLR B shall not accept the activation attempt and shall indicate short term denial in the response.
If MSC B is monitoring MS B when BIC-Roam is activated by destination B then all the CCBS Requests in the destination B queue subsequently become "Active and Quiescent" and HLR B shall send "Stop Reporting" to MSC B. If destination B deactivates BIC-Roam resulting in one or more requests becoming "Active and Operative" in the destination B queue then, HLR B shall send "Start Reporting" to MSC B if monitoring is not already ongoing.
If barring of incoming calls when roaming outside the home PLMN country becomes active and operative for a particular Basic Service Group for destination B, such that a CCBS call from subscriber A is not permitted, HLR B shall cancel the associated request related to the Basic Service Group and select the next non-suspended request in the queue for processing for other Basic Service Groups.
8.14 Completion of calls to busy subscriber (CCBS) Subscriber A may have successfully activated one or more CCBS requests against different destinations B, and also have one or more CCBS requests successfully activated against him by different subscribers. In this case, HLR A shall co-ordinate the different requests.
Checking for an identical CCBS request already existing shall include checks in both directions, i.e. if subscriber A activates a CCBS Request against destination B, HLR A shall check subscriber A’s originating queue for any previous requests activated by subscriber A against destination B for the same basic service group. HLR A shall also check subscriber A’s target queue for any requests activated by destination B against subscriber A for the same basic service group.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)35Release 1999
9 Interaction with other network features TS 22.093 specifies a number of interactions between CCBS and other network features.
9.1 Customised Applications for Mobile network Enhanced Logic (CAMEL)
For a terminating CAMEL based service which changes the destination B address for the original call which subsequently encounters NDUB, the GMSC shall inform originating network that CCBS is not possible when it releases the call.
If an originating CAMEL based service determines for a CCBS Call a different destination B Address than for the original call, the CCBS Call shall be released and the associated CCBS Request shall be cancelled.
If the CAMEL based service requests a call set-up to an alternative destination after the original call has met Busy, CCBS Possible condition, the CCBS activation shall be allowed if the alternative call set-up also encounters Busy condition.
9.2 Support of Optimal Routeing (SOR) The CCBS supporting GMSC shall include CCBS Supported indicator to the SRI message.
If HLR B receives a request for routeing information when destination B is blocked (i.e. the HLR B is waiting for an SRI for a CCBS call set-up) and the SRI does not include a CCBS call indicator nor CCBS supported in the GMSC indicator and the request is from a GMSC not in the same PLMN as HLR B, then HLR B shall return an SRI negative response indicating OR not allowed. This will force the GMSC to route the call to a GMSC in the same PLMN as HLR B (see TS 23.079).
The GMSC in HPLMN B should be able to include the CCBS Call indicator in the non-OR SRI, and the CCBS call set-up will proceed, although it won't be optimally routed.
If the HLR receives an SRI indicating a CCBS-capable GMSC but not a CCBS call while awaiting SRI for a CCBS call, it can treat the request as if the B-subscriber were busy, regardless of where the GMSC is.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)36Release 1999
10 Interworking with other networks The point of interworking shall be the interface between HLR A and HLR B. The flow of information across this interface shall be identical to that between exchanges for the ISDN version of CCBS.
Interworking with ISDNs which support the ISDN version of CCBS is therefore available without further modification.
Interworking with networks other than ISDNs, e.g. private networks, is not specified here, but is not precluded.
CCBS shall be able to interwork through networks which do not support CCBS. In this situation, the CCBS service may fail.
10.1 Interworking with network entities not supporting CCBS CCBS requires support of the service by the following entities for it to operate as specified above:
- MS A;
- MSC A;
- VLR A;
- HLR A;
- GMSC;
- HLR B;
- MSC B;
- VLR B.
The following shows the actions required to cover the situations where these entities do not support CCBS. Note that the situation is further complicated by mobility. For example, MSC A may support CCBS when the initial request is made, but if subscriber A has changed location, the new MSC A may not support CCBS.
It is assumed that the entities support the service at the points in the call where actions are initiated by them, and that an entity which receives an indication for the CCBS service but does not support it can indicate its lack of support to the sending entity.
10.1.1 CCBS not supported by MSC A HLR A knows whether the MSC A supports CCBS or not through the transfer of subscriber data.
MS B becomes idle
When HLR A receives the "Remote User Free" indication for a particular CCBS Request and detects that the MSC A where MS A is currently registered does not support CCBS, then HLR A shall suspend the corresponding CCBS Request and shall send "CCBS Suspend" to HLR B. When MS A registers in a different MSC which supports CCBS, HLR A shall resume the corresponding CCBS Request and shall send "CCBS Resume" to HLR B, continuing as if MS A had become free.
10.1.2 CCBS not supported by HLR B Initial call encounters busy
If an MSC B that supports CCBS recognises that HLR B does not support CCBS then “CCBS Not Possible” will be generated in the CCBS diagnostic.
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3GPP TS 23.093 V3.2.0 (2000-09)37Release 1999
10.1.3 CCBS not supported by MSC B HLR B knows whether the MSC B supports CCBS or not through the transfer of subscriber data.
CCBS Request
If MSC B does not support CCBS, HLR B acknowledge the request and start T7. No processing of the destination B queue and subsequently no monitoring of destination B will be possible until destination B registers in a supporting MSC.
CCBS Call set-up
If HLR B knows that MSC B does not support CCBS the HLR B shall delete the corresponding CCBS Request and shall request a Roaming No without including the CCBS Call indicator in the request. Within Send Routeing Info Ack the HLR shall inform the GMSC to remove CCBS Call Indicator from the IAM message.
After a “Remote User Free” has been sent from MSC B but before the CCBS call set-up is completed, destination B may register in an MSC which does not support the service. MSC B shall accept the CCBS call, but MSC B will not be able to inform HLR B of the successful completion of the CCBS call, so the request will remain active in HLR B until the recall B timer (T9) expires and the request is cancelled.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)38Release 1999
11 Network entity functions The following SDL diagrams describe the various processes and procedures within individual network entities for handling CCBS. The SDL diagrams are as follows:
11.1 Originating Network Processes
11.1.1 Processes and procedures in MSC/VLR Figure 11.1.1.1: Process MSC_CCBS_Recall_Manager
This process controls the CCBS Recall handling in the MSC and controls timers T4 and T10
Figure 11.1.1.2: Process VLR_CCBS_Recall_Manager
This process controls the CCBS Recall handling in the VLR and reports the result of the Recall directly to the HLR.
Figure 11.1.1.3: Process OCH_CCBS_VLR
This process controls the CCBS Call Setup in the VLR
Figure 11.1.1.4: Procedure CCBS_Check_OG_Call
This procedure checks whether the outgoing call meets various conditions set by the CCBS supplementary service. If CCBS is not implemented Pass exit shall be taken.
Figure 11.1.1.5: Procedure CCBS_Check_If_CCBS_Possible
This procedure is called when Release message is received from the destination network. It checks whether CCBS activation is possible.
Figure 11.1.1.6: Procedure CCBS_Activation_MSC
If CCBS activation is possible this procedure is called. It handles the dialogue between MS and MSC and MSC and HLR respectively.
Figure 11.1.1.7: Procedure Page_MS_MSC_For_Recall
During CCBS recall this procedure handles paging of the MS if the location area id is known.
Figure 11.1.1.8: Procedure Search_For_MS_MSC_For_Recall
During CCBS recall this procedure handles paging of the MS on MSC side if the location area id is not known.
Figure 11.1.1.9: Procedure Search_For_MS_VLR_Recall
During CCBS recall this procedure handles paging of the MS on VLR side if the location area id is not known.
Figure 11.1.1.10: Procedure Complete_Recall_MSC
During CCBS recall this procedure handles early channel allocation and establish CC connection with the MS.
Figure 11.1.1.11: Procedure CCBS_OCH_Report_Success
This procedure is called when CCBS call is successfully delivered to the destination network. The procedure informs HLR of successful call delivery.
Figure 11.1.1.12: Procedure CCBS_OCH_Report_Failure
This procedure is called when CCBS call delivery failed to the destination network. The procedure informs HLR of call delivery failure.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)39Release 1999
Process MSC_CCBS_Recall_Manager 1(4)
Signals to/from the leftare to/f rom the BSS.signals to/from the rightare to/f rom the VLRunless specified otherwise
Idle
Search_For_MS_MSC_For_Recall
Page_MS_For_Recall
Search_For_MS_MSC_For
Recall
Page_MS_MSCFor_Recall
Result=Pass
Refer to GSM 03.18Process_Access_
Request_MSC
Result=Pass
Releasecall
resources
Wait_For_Recall_Result
Idle
Yes
No
No
Yes
Figure 11.1.1.1: Process MSC_CCBS_Recall_Manager (sheet 1 of 4)
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3GPP TS 23.093 V3.2.0 (2000-09)40Release 1999
Process MSC_CCBS_Recall_Manager 2(4)
Signals to/from the leftare to/f rom the BSS.signals to/from the rightare to/f rom the VLRunless specified otherwise
Wait_For_Recall_Result
CompleteRecall
Complete_Recall_MSC
Result
TCH allocated :=False
TCH allocated :=True
Releasecall
resources
Wait_For_Recall Idle
Recall
Recall
Is the MS engaged ona circuit switched call
MS =Busy
Start T4 Start T10
Wait_For_Recall_
Response
Pass
TCH_allocated
Fail
No
Yes
Figure 11.1.1.1: Process MSC_CCBS_Recall_Manager (sheet 2 of 4)
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3GPP TS 23.093 V3.2.0 (2000-09)41Release 1999
Process MSC_CCBS_Recall_Manager 3(4)
Signals to/from the leftare to/f rom the BSS.signals to/from the rightare to/f rom the VLRunless specified otherwise
Wait_For_Recall_
Response
CCBS_Recall_Reject(Cause)
T4 Expiry T10 Expiry ReleaseTransaction
Stop T4Stop T10
Cause
Is the MS engaged ona circuit switched call
MS =Busy
Cause:=UDUB, busy
Cause:=UDUB, Idle
Cause:=Rejected
Cause:=T4 Expiry
Cause:=T10 Expiry
Cause:=Radio failure
Recall_Ack(Cause)
Releasecall
resources
Idle
UDUB
RejectedACMMax exceeded
Yes
No
Figure 11.1.1.1: Process MSC_CCBS_Recall_Manager (sheet 3 of 4)
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3GPP TS 23.093 V3.2.0 (2000-09)42Release 1999
Process MSC_CCBS_Recall_Manager 4(4)
Signal s to/from th e leftare to/from the BS S.signals to/fr om the rightare to/from the VL Runless speci fied otherwise
Wa it_For_Recall_
Response
CCBS_Se tup
BasicServiceGroupof the cal l =BasicServiceGroup receivedfrom HLR
Rep laceBNo
Use Translate dBNoinstead of the origin ally
dia led B numb er
Stop T4Stop T10
Cause :=Incompatibe
terminal
Cau se:=Accept
Reca ll_Ack(Cause)
Recall _Ack(Cause)
IdleCCBS_Report_
Not_Idle
Refer to GSM 0 3.18 OG_Call_Setup_MSC
CCBS_Check_Last_Call
Releasecall
resources
Idle
Yes
No
Tru e
False
Figure 11.1.1.1: Process MSC_CCBS_Recall_Manager (sheet 4 of 4)
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3GPP TS 23.093 V3.2.0 (2000-09)43Release 1999
Process VLR_CCBS_Recall_Manager 1(4)
Signals to and from the leftare to/from the MSC. Sign als to and fro m the right are to/from the HLR unless speci fied otherwise
Idle
CCBS_RUF
Check_Parameters See GSM 03.1 8
Resul t
Error:=Negativerespon se
CCBS_RUF_Error (Error)
Not_Reachable
To CCBS_Mo nitoring_VLR
Idle
IMSIDetached
Error := IMSI_Detache d
Roaming inLA Allo wed
Locationarea IDknown
Search_For_MS_VL R_
Recall
Result=Pass
1 Wait_For_Recall_ Requ est
Page_ MS_For_Recal l
Error := Restricted_Area
Fail
Pass
Yes
No
Yes
No
No
Yes
Yes
No
Figure 11.1.1.2: Process VLR_CCBS_Recall_Manager (sheet 1 of 4)
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3GPP TS 23.093 V3.2.0 (2000-09)44Release 1999
Process VLR_CCBS_Recall_Manager 2(4)
Signals to and from the lef tare to/from the MSC. Signals to and from the right are to/from the HLR unless specified otherwise
Wait_For_Recall_Request
Page MS ForRecallnegativeresponse
1ProcessAccessRequest
Absentsubscriber Refer to GSM 03.18
Process_Access_
Request_VLR
This check does notdetermine whether aCC connect ion is establishedbut rather that another call isin the establishment phase
Busysubscriber
Not_Reachable
To CCBS_Monitoring_VLR
Result =Pass
Error :=System_Failure
Error :=CComp_Busy
Error :=No Page Response
Error := Absent_Subscriber
CCBS_RUF_Error (Error)
CompleteRecall
IdleWait_For_
Complete_Call_Result
No
Yes
No
Yes
No
Yes
Figure 11.1.1.2: Process VLR_CCBS_Recall_Manager (sheet 2 of 4)
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3GPP TS 23.093 V3.2.0 (2000-09)45Release 1999
Process VLR_CCBS_Recall_Manager 3(4)
Signals to and from the leftare to/from the MSC. Signals to and from the right are to/from the HLR unless specified otherw iseWait_for_
Complete_RecallResul t
CompleteRecal l ack
CompleteRecal l negativere sponse
Recal l Neg ativeResponse
Error :=Incompatib le_
Terminal
Error := Radio_Failure
Error := System_Fai lure
CCBS_RUFError (Error)
Wait_Fo r-Recall_
ResponseIdle
Incompatible _Terminal
Ab sent_Su bscriberRadio_Congestion
ELSE
Figure 11.1.1.2: Process VLR_CCBS_Recall_Manager (sheet 3 of 4)
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3GPP TS 23.093 V3.2.0 (2000-09)46Release 1999
Process VLR_CCBS_Recall_Manager 4(4)
Signals to and from the leftare to/from the MSC. Signals to and from the right are to/from the HLR unless specified otherw ise
Wait_For-Re call_
Re spon se
Recall _Ack(Cause)
Ca use = Ra dioFa ilure
Re sult :=Ca use
Error := Radio_Fai lure
CCBS_RUF_Ack (Result)
CCBS_RUF_Error (Error)
Re sult
Wait_For_Ca ll_Del ivery
CCBS_Call_Delive ry(Outcome)
Mode := A
CCBS_Call _Repo rt(Mode,Outcome)
Idle
No
Ye s
RUF Accepted
EL SE
Figure 11.1.1.2: Process VLR_CCBS_Recall_Manager (sheet 4 of 4)
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3GPP TS 23.093 V3.2.0 (2000-09)47Release 1999
Process OCH_CCBS_VLR 1(1)
Idle
Send infoFor OutgoingCall
Note: From GSM 03.18Procedure OG_Call_Setup_MSC
OG_Call_Subscription_Check_VLR
See GSM 03.18
Idle
Figure 11.1.1.3: Process OCH_CCBS_VLR
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)48Release 1999
Procedure CCBS_Check_OG_Call 1(1)
CCBS ProvisionedandME supports CCBS
Reconnect
CCBS Call
Transl atedBNo :=Routing addressi n internationalE.164 forma t
Tra nslated B No receivedfrom HLR = CCBS Cal ltranslate d target
TranslatedBNo :=Ro uting addre ssin internationa lE.164 format
Set CCBS_ Cal l_Indica tor to IAM
message
Store CallInformation
Result :=Fail
Result :=Pass
Yes
No
False
True
Yes
No
Yes
No
Figure 11.1.1.4: Procedure CCBS_Check_OG_Call
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3GPP TS 23.093 V3.2.0 (2000-09)49Release 1999
Pro cedure CCBS _Check_If_C CBS_P ossible 1(1)
Call CompletionTrea tment Indica tor pres ent in S II2?
Ca ll Completion Tr eatmentIndicator set t o re jec t callcompletion serv ic ereq uest?
CCBSProvis ioned
Reconnect
Initialresult
Cause = BusyorCause = No circuitchannel available
Result :=CCBS_
Possible
Result :=CCBS_Not_
Possible
Cau se = BusyorCau se = No circuitchannel available
CCBSCall
Outcome :=Failure
CCBS_Call_Delivery(Outcome)
To V LR_CCB S_Rec all_Manager
Clear storedcall inf ormation
Initial re sult :=CCBS_NotPossible
Resu lt : =CCBS_Not_
Possible
CCBSCall
Outcome :=Busy
CCBS_Call_Delivery(Outcome)
To VLR_CCBS_Rec all_Manager
CCBSPossible
Che ck diagnos tic assoc ia ted w it h the busy cause value
MEsupports
CCBS
Initial result :=CCBS_
Possible
Result :=CCBS_
Possible
Y es
No
Y es
True
CCBS_Possible
Yes
No
CCBS_Not_Possible
FalseNo
Yes
NoY es
Y es
Y esNo
Y es
No
No
No
Yes
No
Figure 11.1.1.5: Procedure CCBS_Check_If_CCBS_Possible
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3GPP TS 23.093 V3.2.0 (2000-09)50Release 1999
Procedure CCBS_Activation_MSC 1(2)
Signals to/from the leftare to/f rom the BSS;signals to/from the rightare to/f rom HLRunless marked otherwise
CCBS_Possible
Start T1
RR connect ionmay be converted
to an SDCCH
Wait_For_CCBS_Request
CCBS_Request T1 Expiry Internal
timer expiryReleasetransaction
Stop T1 Releasetransaction Stop T1
CCBS_Request
Clear StoredCall Information
Clear StoredCall Information
MSC AWait for CCBSRequest Ack
Figure 11.1.1.6: Procedure CCBS_Activation_MSC (sheet 1 of 2)
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3GPP TS 23.093 V3.2.0 (2000-09)51Release 1999
Procedure CCBS_Activation_MSC 2(2)
Signals to/from the leftare to/f rom the BSS;signals to/from the rightare to/f rom HLRunless marked otherwise
MSC AWait for CCBSRequest Ack
CCBSRequest_Ack
CCBSRequest_Error
Releasetransaction
Release(CCBSRequest Ack)
Release(CCBSError)
Releasetransaction
Releasetransaction
Figure 11.1.1.6: Procedure CCBS_Activation_MSC (sheet 2 of 2)
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3GPP TS 23.093 V3.2.0 (2000-09)52Release 1999
Procedure in the MSCto page an MS in aspecified location area
Procedure Page_MS_MSC_For_Recall PAGE_M1(2)
Signals to/from the leftare to/f rom the BSS; signals to/from the rightare to/f rom the VLRunless marked otherwise
Locat ionarea IDknown
MSconnection
existsDoes an RR connection exist
Regat iveresponse:=
Unknown LAI
Set accessconnection
status
Start Pageresponse
timer
Page MS ForRecallnegativeresponse
Result:=Pass
In specified location area Page Result:=
Fail
Wait_For_Page_
Response
Yes
No
Yes
No
Figure 11.1.1.7: Procedure Page_MS_MSC_For_Recall (sheet 1 of 2)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)53Release 1999
Procedure in the MSCto page an MS in aspecified location area
Procedure Page_MS_MSC_For_Recall PAGE_M2(2)
Signals to/from the leftare to/f rom the BSS; signals to/from the rightare to/f rom the VLRunless marked otherwise
Wait_For_Page_
Response
MSconnectionestablished
Pageresponsetimer expired
CM ServiceRequest
For circuit-switched call
CM ServiceRequest
To process OCH_MSC
Negativeresponse:=
AbsentSubscriber
Negativeresponse:=
Busy Subscriber
Set accessconnection
status
Page MS ForRecallnegativeresponse
Page MS ForRecallnegativeresponse
Result:=Pass
Result:=Fail
Result:=Fail
Figure 11.1.1.7: Procedure Page_MS_MSC_For_Recall (sheet 2 of 2)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)54Release 1999
Procedure in the MSCto search for an MS (page in all location areas)
Procedure Search_For_MS_MSC_For_Recall 1(1)
Signals to/from the leftare to/from the BSS; signals to/from the rightare to/from the VLRunless marked otherwise
Does an RR connection existMS
connectionexists?
Start Pageresponse
timer
Set accessconnection
status
In alllocation areas Page Result:=
Pass
Wait_For_Search_
Response
MSconnectionestablished
Pageresponsetimer expired
CM ServiceRequest
For circuit-switched call
Search_For_MSMSC_For_Recall_Ack
CM ServiceRequest
To GSM 03.18 Process OCH_MSC
Set negativeresponse:
AbsentSubscriber
Set negativeresponse:
Busy Subscriber
Set accessconnection
status
Search For MSMSC For Recall negativeresponse
Search For MSMSC For Recall negativeresponse
Result:=Pass
Result:=Fail
Result:=Fail
No
Yes
Figure 11.1.1.8: Procedure Search_For_MS_MSC_For_Recall
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)55Release 1999
Procedure in the VLRto search for an MS (i.e. page in all location areas)
Procedure Search_For_MS_VLR_Recall 1(1)
Signals to/f rom the leftare to/from the MSC
Search_ For_MS_MSC_For_Recall
Wait_For_Search_Result
Search_For_MSMSC_For_Recall_Ack
Search_For_MSMSC_For_Recall negativeresponse
UpdateLocationArea ID
Transfer negat ivecause to the
parent process
Result:=Pass
Result:=Fail
Figure 11.1.1.9: Procedure Search_For_MS_VLR_Recall
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)56Release 1999
Procedure Complete_Recall_MSC 1(2)
Signals to/from the leftare to/from the BS S;signals to/fr om the rightare to/from the VLRunless marked o therwise
CM_S erv_ Prompt
Wait_For_CM_ Serv_Prompt_
Response
Rele asetran saction
Co nnection_type_not_supported
Start_CC
Negativeresponse:=
Absentsubscriber
CCBS_Ca ll_Info
Wait_For_Ack
Incompatib leTermi nal
Release(UDUB)
Releasetransaction
CCBS_Ca ll_Info_Confi rmed
Negativere sponse:=
Incompatib leTerminal
Negativerespon se:=
CComp Busy
Negativeresponse:=
Absentsubscriber
BasicServiceGroupof the CCBS_ Cal l_Info= BasigServiceGroupreceived from HLR
Negativeresponse:=
IncompatibleTerminal
Complete_Reca ll_negative_Resp onse
Result:=Fail
1
No
Yes
Figure 11.1.1.10: Procedure Complete_Recall_MSC (sheet 1 of 2)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)57Release 1999
Procedure Complete_Recall_MSC 2(2)
1
Early traficchannelal location?
Establ ish_Originating_
TCH_If_Re quire d
Refer GSM 03.18
Re sult =Pass
Negativeresp onse :=
Radio_congestion
Complete_Recal l_Ack
Complete_Recal l_Ack
Complete_Recall_negative_Response
Result :=Pass
Re sult:=TCH_all ocated
Result:=Fail
YesNo
No
Yes
Figure 11.1.1.10: Procedure Complete_Recall_MSC (sheet 2 of 2)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)58Release 1999
Procedure CCBS_OCH_Report_Success 1(1)
CCBSCal l
Reconnect
Outcome :=Success
To VLR_CCBS_Recal l_Manager
CCBS CallDelivery(Outcome)
C lear storedca ll info rmation
Yes
No
False
True
Figure 11.1.1.11: Procedure CCBS_OCH_Report_Success
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)59Release 1999
Procedure CCBS_OCH_Report_Failure 1(1)
CCBSCall
Reconnect
Outcome :=Failure
To VLR_CCBS_Recall_Manager
CCBS CallDelivery(Outcome)
Yes
No
False
True
Figure 11.1.1.12: Procedure CCBS_OCH_Report_Failure
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)60Release 1999
11.1.2 Processes and procedures in HLR Figure 11.1.2.1: Block diagram of HLRA processes
Figure 11.1.2.2: Process HLRA_Request_Manager
This process is in charge of the user interface procedures and queue handling, i.e. whether the request to processed is present in the queue or not.
The process has three states, "Idle", "Operative" and "Operative Resuming". In the "Idle" state the queue is empty and the only actions to queue are creation of new request and interrogation of the queue. In other states activation, interrogation and deactivation procedures similarly, that is why they are grouped under "*" state.
Whenever the first request is created the process changes it’s state to "Operative", in this state there are request(s) in the queue and none of them are suspended.
When HLRA_Request reports of suspension the process changes it’s state to "Operative Resuming" and the HLRA_Resume is started with correct trigger signal i.e. idle indication from MSC or recall end is waited.
Only NET suspended request can be selected and resumed, USER type suspended requests remain as suspended until them are marked as NET suspended. This happens when idle indication is received from the MSC.
The resuming process is paused if there is new suspended request with cause code Not reach i.e. The resuming starts again when idle condition is met again or there is a new recall with successful outcome i.e. the recall ends without Not Reach indication.
The resuming process will be stopped, if there are no suspended requests in the queue any more. The process changes it’s state to normal "Operative" or "Idle" state.
Figure 11.1.2.3: Process HLRA_Request
This process is created during the activation of service and contains all related data. The process has five different states, "Wait_For_Answer", "Active", "Recall", "Suspended" and "Frozen". During its creation the process sends CCBS_Request via SSAP interface to destination network B containing all call related data as well originating networks retention capabilities.
In the "Wait_For_Answer" state process receives response from destination network which is further relayed to the HLRA_Request_Manager. In case of positive acknowledgement destination network returns info whether the retention is supported in both networks.
In "Active" state process waits recall from destination network, however process can vanish if operation timer T3 expires or explicit deletion is received from the user or destination network. In case of deletion the process informs the queue. When the recall arrives the process transits to the "Recall" state.
In the "Recall" state process waits the recall outcome, either positive or negative. Depending of the recall outcome the request can be deleted, retained or suspended. If the request is to be retained the process transits back to the "Active" state. If the request is suspended due to the T10 expiry, CCBS_Busy condition or the MS is not reachable the process transits to the suspended state.
If the request is deleted during "Recall" due SSAP_Cancel, T3 expiry or explicit deletion the queue is updated immediately and the request changes it’s state to "Recall Deleted" where it waits the recall to end.
In the "Suspended" state actions the request can be resumed if the MS is known to be CCBS_Idle or the request can be deleted due to the explicit deletion or timer T3 expiry.
The request is placed in “Frozen” state whenever it receives Remote User Free indication from the destination network and the request can’t be fulfilled due service interaction or lack of support in MSCVLR. The request shall indicate suspended back to the destination network and stay in the queue. If the service becomes later possible, the request will revert back “Active” state and indicate resumed to the destination network.
Whenever the state of the process is changed, the new state is stored and the procedure CCBS_Notify_SS_Invocation is called.
Figure 11.1.2.4: Process HLRA_Recall_Manager
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)61Release 1999
This process has two different states, "Idle" and "CCBS_Busy".
The process let’s only one individual process to be in recall state in a time and have a dialogue open to the MSC and it changes it’s state to "CCBS_Busy". In this state other requests are suspended immediately and marked as NET suspended with cause code = Busy.
In "CCBS_Busy" state the process waits recall reporting from the MSC. Possible inputs from the MSC are CCBS_RUF_Ack, CCBS_RUF_Error and CCBS_Call_Report. CCBS_Call_Report can be received if the subscriber has accepted the recall, otherwise the process changes it’s state back to "Idle". If the process receives Query_State request from the HLRA_Resume during the recall the process informs the resume process whether a recall is being processed.
Figure 11.1.2.5: Process HLRA_Resume
The process has four different states, "Idle", "Resume pending", "Wait For Selection" and "Resuming". The process is started when a request is suspended. For the first suspended request it is also set the trigger point i.e. when it is correct to send out selection request for resuming. Two triggers are provided, A_Idle from the monitoring process and Recall_End from the recall handling. If the trigger is set to A_Idle the monitoring process is also started.
When the process is started and correct trigger is set the process waits in the "Resume pending" state to receive a permission to start resuming. When the permission is received the process asks for the first NET request to resumed. If A_Idle signal is received from the monitoring process the resuming process asks the queue manager to set all suspended requests as NET type in order to allow the selection.
When there are no active suspended request in the queue any more the resuming process is stopped i.e. when the "Deleted" signal in the HLRA_Request_Manager is handled.
Figure 11.1.2.6: Process HLRA_Monitoring
Monitoring process has two different states, "Idle" and "Monitoring". Receival of "A_Query" signal transits the process to "Monitoring" state. In this state the process reports "Idle" condition to the resuming process and starts the monitoring again in the MSC if location update or restore data happens.
Figure 11.1.2.7: Procedure HLRA_CCBS_Check_Interactions
This procedure checks whether the Remote User Free indication can be delivered to the MSCVLR or not.
Figure 11.1.2.8: Procedure CCBS_Notify_SS_Invocation
This procedure is called by the process HLRA_Request whenever there is a change of state. The procedure informs the gsmSCF of the state change if the SS-CSI applicable to CCBS is stored in the HLR.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)62Release 1999
Block HLRA_Processes 1(1)
HLRA_Request_Manager(1,1)
HLRA_Request(0,5)
HLRA_Resume(1,1)
HLRA_Monitoring(1,1)
HLRA_Recall_Manager(1,1)
VLRA
CCBS_Request_AckCCBS_Request_ErrorInterrogate_CCBS_AckDeactivate_CCBS_Ack
CCBS_RequestInterrogate_CCBSDeactivate_CCBS
ResumeDelete
CCBS_Request_AckCCBS_Request_ErrorSuspendDeleted
CCBS_RequestCCBS_SuspendCCBS_ResumeCCBS_Cancel
CCBS_Request_AckCCBS_Reject_RequestRemote_User_FreeCCBS_CancelCCBS_END
Destinationnetwork B
Recall
CompletedSuspendFailureBusy
Set_All_ActiveSelect_Active_ReqSelect_Fi rst_Req
Set_Trigger_Recall_EndSet_Trigger_A_Id leReset_Trigger _A_IdleSelect_RespNot_S electedStop_Resume
Query_Status
RecallRecall_End
A_QueryStop_Monitoring
A_Idle
CCBS_Coordinator_HLR
CCBS_Call_Report
Start_ReportingStop_Reporting
Start_Reporti ng_AckEvent_Report
VLRACCBS_RUF_A ckCCBS_RUF_E rrorCCBS_RUF
Figure 11.1.2.1: HLRA Processes
NOTE: Figure 11.1.2.1 is one possible method of implementing queue processing in HLR A. Manufacturers are not constrained to follow the implementation given in figure 11.1.2.1. However, the external behaviour of HLR A shall appear to be the same.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)63Release 1999
Description of above signals:
Relation HLRA_Request_Manager and HLRA_Request
CCBS_Request_Ack signal is acknowledgement of a successful activation from the individual request to the queue manager.
CCBS_Request_Error signal is sent if the destination networks queue is full or the destination networks queue size is set to zero. The individual request is deleted from the originating side.
Suspend is used within HLRA_Request and HLRA_Request_Manager. The queue shall update it’s internal information.
Delete is used within HLRA_Request_Manager and HLRA_Request. The queue manager instructs the individual request the request to die.
Deleted is used within HLRA_Request_Manager and HLRA_Request. The individual request informs the queue of its expiry.
Resume is used within HLRA_Request_Manager and HLRA_Request. The individual request is resumed and it shall inform the destination network of the resumption.
Relation HLRA_Request_Manager and HLRA_Resume
Set_Trigger_Recall_End is used within the HLRA_Request_Manager and HLRA_Resume. If resuming is not ongoing this signal set the resuming process to the "ResumePending" state and query is sent to the recall process.
Set_Trigger_A_Idle is used within the HLRA_request_manager and HLRA_resume. If resuming is not ongoing this signal set the resuming process to the "ResumePending" state. In all cases this causes "A_Query" signal to be sent.
Reset_Trigger_A_Idle is used within the HLRA_request_manager and HLRA_resume. This signal sets the resuming process to the "ResumePending" state and causes "A_Query" signal to be sent.
Select_Resp is used within the HLRA_request_manager and HLRA_resume. This signal informs the resuming process to start T11.
Not_Selected is used within the HLRA_request_manager and HLRA_resume. This signal informs the resuming process that the selection was not done and the process will transit to "ResumePending" state.
Stop_Resume is used within the HLRA_request_manager and HLRA_resume. This signal informs the resuming process to stop it’s actions and stop the monitoring also.
Set_All_Active is used within the HLRA_Resume and HLRA_request_manager. This signal informs the queue to set all suspended requests as NET suspended and later on they can be resumed.
Select_Active_Req is used within the HLRA_Resume and HLRA_request_manager. This signal informs the queue to select first NET suspended request to be resumed. If successful the request process will return "Select_Resp", otherwise "Not_Selected".
Select_First_Req is used within the HLRA_Resume and HLRA_request_manager. This signal informs the queue to select first suspended request to be resumed. If successful the request process will return "Select_Resp", otherwise "Not_Selected".
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)64Release 1999
Relation HLRA_Recall_Manager and HLRA_Request
Recall is used within HLRA_Request and HLRA_Recall_Manager. It contains all call related data in order to form the CCBS_Call.
Completed is used within the HLRA_Recall_Manager and HLRA_Request. It informs the request of successful CCBS_Call and causes the request to vanish.
Failure is used within the HLRA_Recall_Manager and HLRA_Request. It informs the request of unsuccessful CCBS_Call and causes the request to vanish.
Busy is used within the HLRA_Recall_Manager and HLRA_Request. It informs the request of unsuccessful CCBS_Call and causes the request to vanish if retention is not supported.
Suspend is used within HLRA_ Recall_Manager and HLRA_ Request. The request shall change it’s state and report the suspension to the queue manager.
Relation HLRA_Monitoring and HLRA_Resume
A_Query is used within HLRA_Resume and HLRA_Monitoring. It instruct the HLRA_Monitoring to start it’s actions and return the idle condition when possible.
A_Idle is used within HLRA_Monitoring and HLRA_Resume. It informs the resuming process that the subscriber is now CCBS_Idle and not CCBS_Busy.
Stop_Monitoring is used with HLRA_Resume and HLRA_Monitoring. It instructs the monitoring process to stop it’s actions and stop the monitoring from VLR also.
Location_Update/Restore_Data events are tracked and external reporting is started again.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)65Release 1999
Process HLRA_RequestManager(1,1) 1(10)
IDLEThere is not any re quest in the IDLE state
CCBS_Request From MSCVL R
Check_Parameters
Se e GSM 03 .18
IDLE Resul t
HLRA_Request
Error :=Negativerespo nse
Upda te thequeu e
CCBS_Request_Error(Erro r)
To MSCVLR
IDLE OPERATIVE IDLE
From MSC_VLR Deactivate_CCBS
See GSM 03.18 Check_Parameters
Result
CCBSprovisioned
Deactivate_Resu lt :=
Not Provisi oned
Deactivate_Result :=Succe ss
Error :=Negativere sponse
To MSC_VLRDeactivate_CCBS_Ack(Deactivate_Resu lt)
Deactivate_CCBSError(Error)
To MSCVLR
IDLE IDLE
Pass
Fai l
Pass
Fail
No
Yes
Figure 11.1.2.2: Process HLRA_Request_Manager (sheet 1 of 10)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)66Release 1999
Process HLRA_RequestManager(1,1) 2(10)
*
Interro gate_CCBS
From MSC_VLR
Check_Parameters See GSM 03.1 8
Resul t
Error :=Nega tiveresponse
CCBSprovisioned
To MSC_ VLRInterrogate_CCBS_Ack(Erro r)
Queuee mpty
- Resu lt :=No Entries
Query the queue :=
List
Result :=Not_ Provisione d
Resul t := List
To MSC_ VLRInterrogate_CCBS_Ack(Resul t)
To MSC_ VLRInterroga te_CCBS_Ack(Result)
Interro gate_CCBS_Ack(Resul t)
To MSC_ VLR
-
Fa il
Pass
Yes
No
Yes
No
Figure 11.1.2.2: Process HLRA_Request_Manager (sheet 2 of 10)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)67Release 1999
Process HLRA_RequestManager(1,1) 3(10)
*(IDLE)
CCBS_Request_Ack
From HLRA_Request
CCBS _Request_Ack
To MSC_VLR
-There is at least onerequest in the queue
CCBS_Request_Error(Error)
From HLRA_Request
CCBS_Request_Error(Error)
To MSC_VLR
Update thequeue
Queueempty
IDLE
No
Yes
Figure 11.1.2.2: Process HLRA_Request_Manager (sheet 3 of 10)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)68Release 1999
Process HLRA_RequestManager(1,1) 4(10)
*(IDLE)
From MSCVLR CCBS_Requ est
See GSM 03.18 Check_Parameters
Resul t
Queueful l
Error :=Negativerespo nse
Id entica lrequest
Error :=Short_Term_
Denial
To HL RA_Request. The e xisting entryshould be d elete d
Delete
Update thequeue To MSCVLR
CCBS_Request_Error(Erro r)
HLRA_Request
Update the queue
-
Pass
Fai l
No
Yes
Yes
No
Figure 11.1.2.2: Process HLRA_Request_Manager (sheet 4 of 10)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)69Release 1999
Process HLRA_RequestManager(1,1) 5(10)
*(IDLE)
Suspend(Type,Sus_Cause)
From individualHLRA_Request
Type
Mark requestUSER
suspended
NOTE: USER suspendedrequests can't beselected until MSCVLRreports idle condit ion
Set_Trigger_A_Idle(Sus_Cause)
To HLRA_ResumeNOTE: Request canresumed when idlecondition is met
OPERATIVERESUMING
In this state thereis at least onesuspendedrequests
Mark requestNET
suspended
NOTE: NET suspendedrequests can beselected when Idle condition is met or Recall_Manager reportsRecall_End
Sus_Cause
Reset_Trigger_A_Idle(Sus_Cause)
To HLRA_ResumeNOTE: Resuming ispaused until idlecondition is met
Set_Trigger_Recall_End
To HLRA_ResumeNOTE: Resuming canbe started when recallis ended
USER
NET
Not_Reach
ELSE
Figure 11.1.2.2: Process HLRA_Request_Manager (sheet 5 of 10)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)70Release 1999
Process HLRA_RequestManager(1,1) 6(10)
OPERATIVE
Deactiva te_CCBS From MSC_ VLR
Check_Parameters
Resul t
Delete allrequests
Error :=Nega tiveresponse
Req uestexists
To MSCVLRDeactiva te_CCBSErro r(Error)
To individualHLRA_Request Delete Delete
To HL RA_Reque stNOTE: To al l individual reque sts
OPERATIVE
Resul t :=Success
Deactiva te_CCBS_Ack(Resul t)
To MSC_VLR
Update thequeue
Que ueempty
OPERATIVE IDLE
Pass
Fa il
No
Yes
Yes
No
No
Yes
Figure 11.1.2.2: Process HLRA_Request_Manager (sheet 6 of 10)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)71Release 1999
Process HLRA_RequestManager(1,1) 7(10)
OPERATIVE
Deleted From individual HLRA_Request
Update therequest queue
Queueempty
OPERATIVE IDLE
No
Yes
Figure 11.1.2.2: Process HLRA_Request_Manager (sheet 7 of 10)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)72Release 1999
Process HLRA_RequestManager(1,1) 8(10)OPERATIVERESUMING
Deactivate_CCBS From MSC_VLR
Check_Parameters
See GSM 03.1 8
Resul t
Delete allre quests
Error :=Negativerespo nse
Requestexists
To MSCVLRDeactivate_CCBSError(Erro r)
To individualHLRA_Req uest Delete Dele te
To HLRA_Req uestNOTE : To all individual requests
OPERATIVERES UMING
Resul t :=Success
Deactivate_CCBS_Ack(Resul t)
To MSC_ VLR
Update theq ueue
Anysuspen ded
requests
Stop_Resu me
To HLRA_Resume
Queuee mpty
OPERATIVERESUMING OPERATIVE IDLE
Pass
Fai l
No
Yes
Yes
No
No
Yes
No Yes
Figure 11.1.2.2: Process HLRA_Request_Manager (sheet 8 of 10)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)73Release 1999
Process HLRA_RequestManager(1,1) 9(10)
OPERATIVERESUMING
Deleted From individual HLRA_Request
Update therequest queue
Anysuspendedrequests
Stop_Resume
To HLRA_Resume
Queueempty
OPERATIVE IDLEOPERATIVERESUMING
No
No Yes
Yes
Figure 11.1.2.2: Process HLRA_Request_Manager (sheet 9 of 10)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)74Release 1999
Process HLRA_RequestManager(1,1) 10(10)
OPERATIVERESUMING
Set_All_Active
From HLRA_Resume
Mark all USER suspended requestsas NET suspended
OPERATIVERESUMING
Select_Active_Req
From HLRA_Resume
Any NETsuspendedrequest
Select the first NET suspended
request
Update queue,remove suspend
marking for request
ResumeTo individualHLRA_Request
Any moresuspendedrequests
Stop_Resume
To HLRA_Resume
OPERATIVE
Select_Resp
To HLRA_ResumeNOTE: T11 isstarted
Anysuspendedrequests
Not_Selected
To HLRA_ResumeNOTE: T11 is notstarted, Resumewaits A_Idle
OPERATIVERESUMING
Select_First_Req
From HLRA_Resume
Mark all USER suspended requestsas NET suspended
Yes
No
Yes
No
No
Yes
Figure 11.1.2.2: Process HLRA_Request_Manager (sheet 10 of 10)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)75Release 1999
Process HLRA_Request 1(5)
FPARAll the data in the originalCCBS_Request Retain
supported
CCBS_Request(Retain_Supported)
To destination network B. NOTE: This signalcontains also info of originating network's retain capabilities.
WAIT_FOR_ANSWER
CCBS_Request
To dest ination network B. NOTE: This signaldoes not contain any information of theretain support.
WAIT_FOR_ANSWER
CCBS_Request_Ack(Retainsupported)
From destination network B. NOTE: Retain_supportedparameter contains info whether retain is supported for this request all alongthe network path. The parameter is received only if retain supported was sendin the CCBS_Request signal.
Store receivedRetain_supported
value
Start T3
CCBS_Request_Ack
To HLRA_Request_Manager
State :=Request
CCBS_Notify_SS_Invocation
ACTIVE
CCBS_Reject_Request(Cause)
From destinationnetwork B
Error :=Cause
CCBS_Request_Error(Error)
To HLRA_Request_Manager
Yes No
Figure 11.1.2.3: Process HLRA_Request (sheet 1 of 5)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)76Release 1999
Process HLRA_Request 2(5)
ACTIVE
Remote_User_Free
From destinationnetwork B
HLRA_CCBS_CHECK_
INTERACTIONS
Result
RecallTo HLRA_Recall_Manager
State :=Recall
CCBS_Notify_SS_Invocation
RECALL
CCBS_Suspend
To destinationnetwork B
State :=Frozen
CCBS_Notify_SS_Invocation
FROZEN
T3 Expiry
Cause :=T3-Timeout
CCBS_Cancel(Cause)
To destinationnetwork B
DeletedTo HLRA_Request_Manager
State :=Deleted
CCBS_Notify_SS_Invocation
CCBS_Cancel
From destinationnetwork B
DeleteFrom HLRA_Request_Manager
CCBS_Cancel
To destinationnetwork B
1
2
Pass
Fail
Figure 11.1.2.3: Process HLRA_Request (sheet 2 of 5)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)77Release 1999
Process HLRA_Request 3(5)
RECALL
CompletedFrom HLRA_Recall_Manager
DeletedTo HLRA_Request_Manager
BusyFrom HLRA_Recall_Manager
Retain_supported
State :=Active
CCBS_Notify_SS_Invocation
ACTIVE
Failure(Cause)
From HLRA_Recall_Manager
Cause
Cause :=T4-Timeout
CCBS_Cancel(Cause)
To destinationnetwork B
DeletedTo HLRA_Request_Manager
1
CCBS_Cancel
To destinationnetwork B
3
RECALL
DeleteFrom HLRA_Request_Manager
CCBS_Cancel
To destinationnetwork B
1
CCBS_Cancel
From destinationnetwork B
DeletedTo HLRA_Request_Manager
CCBS_END
From destinationnetwork B
T3 Expiry
State :=Completed
CCBS_Notify_SS_Invocation
False
True T4 exp
else
Figure 11.1.2.3: Process HLRA_Request (sheet 3 of 5)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)78Release 1999
Process HLRA_Request 4(5)RECALL
From HLRA_Recall_Manager
Suspend(Type,Sus_Cause)
To destinationnetwork B
CCBS_Suspend
To HLRA_Request_Manager
Suspend(Type,Sus_Cause)
State :=Suspend
CCBS_Notify_SS_Invocation
SUSPENDED
SUSPENDED
From HLRA_Request_Manager
Resume T3 ExpiryFrom destinationnetwork B
CCBS_Cancel
From HLRA_Request_Manager
Delete
To destinationnetwork B
CCBS_Resume
Cause :=T3-Timeout
To destinationnetwork B
CCBS_Cancel
CCBS_Cancel(Cause)
To destinationnetwork B
To HLRA_Request_Manager
Deleted
1
3
4
1
Figure 11.1.2.3: Process HLRA_Request (sheet 4 of 5)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)79Release 1999
Process HLRA_Request 5(5)
FROZEN
T3 Expiry
Cause :=T3-Timeout
CCBS_Cancel(Cause)
To destinationnetwork B
DeletedTo HLRA_Request_Manager
CCBS_Cancel
From destinationnetwork B
Location_Update
HLRA_CCBS_CHECK_
INTERACTIONS
Result
Type := NETSus_Cause :=
Temporary
Suspend(Type,Sus_Cause)
To HLRA_Request_ManagerNote: Allthough the requestcan be handled due theinteraction has been removedthe HLRA_Resume processis invoked in order to resumethe request in well organizedmanner.
FROZEN
DeleteFrom HLRA_Request_Manager
CCBS_Cancel
To destinationnetwork B
1
2
1
4
Pass
Fail
Figure 11.1.2.3: Process HLRA_Request (sheet 5 of 5)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)80Release 1999
Process HLRA_RecallManager 1(4)
IDLE
RecallFrom individualHLRA_Request
RecallTo HLRA_Resumeto stop T11
CCBS_RUFTo MSC_VLR
CCBS_BUSY
Query_Status
From HLRA_Resume
Recall_End To HLRA_Resume
IDLE
CCBS_BUSY
RecallFrom individualHLRA_Request
Type := NETSus_Cause
:= Busy
Suspend(Type,Sus_Cause)
To individualHLRA_Request
CCBS_BUSY
Figure 11.1.2.4: Process HLRA_Recall_Manager (sheet 1 of 4)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)81Release 1999
Process HLRA_RecallManager 2(4)
CCBS_BUSY
CCBS_RUF_Ack(Result)
From MSC_VLR
Result
Start T12
CCBS_BUSY
Caus e :=Resu lt
Failure(Cause)
To individualHLRA_Request
Recall_EndTo HLRA_Resume
IDLE
Type := USERSus_Cause
:= Busy
Suspend(Type,Sus_Cause )
To ind ividualHLRA_Request
RUF Ac cepted
T4 expi ryUDUB_IdleRUF Re jected
T10 expiryUDUB _Busy
Figure 11.1.2.4: Process HLRA_Recall_Manager (sheet 2 of 4)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)82Release 1999
Process HLRA_RecallManager 3(4)
CCBS_BUSY
T12 exp iryCCBS_RUF_Erro r(Error)
From MSC_VLR
Close thecommunication
between HLR and VLRError
Cause :=Failure
Type := NETSus_Cause
:= Not Reach
To individua lHLRA_Request
Fai lu re(Caus e)
To individualHLRA_Reques tNOTE: Becaus eMS is not reachableresuming is not started
Suspend(Type,Sus_Cause)
To HLRA_Resume
Recall_End
IDLE
ELSE
IMSI DetachedRestricted AreaNo Page ResponseAbsen t_Subs cribe rRadio FailureCCom p Busy
Figure 11.1.2.4: Process HLRA_Recall_Manager (sheet 3 of 4)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)83Release 1999
Process HLRA_RecallManager 4(4)
CCBS_BUSY
From CCBS_Coordina tor_HLR
CCBS_Call_Report(Outcome)
Stop T12
Outcome
Cause :=Failure
To individualHLRA_Request Co mpleted To individual
HLRA_RequestFailure(Caus e)
To individu alHLRA_ Request Busy
To HLRA_Resume Recall_End
IDLE
Fai lure
Success Busy
Figure 11.1.2.4: Process HLRA_Recall_Manager (sheet 4 of 4)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)84Release 1999
Process HLRA_Resume 1(3)
*(IDLE) *
Stop_Resume
From HLRA_Request_Manager
Reset_Trigger_A_Idle(Sus_Cause)
From HLRA_Request_Manager. Note:The subscriber is not reachableand the possibly ongoing resumingis stopped until A_Idle input isreceived.
Stop_Monitoring
To HLRA_Monitoring
A_Query(Sus_Cause)
To HLRA_Monitoring
IDLE IDLE RESUME_PENDING
*(IDLE)
Set_Trigger_A_Idle(Sus_Cause)
From HLRA_Request_Manager. Note:Suspended request was markedinactivate and needs A_Idle inputin order to be resumed. Ongoingresuming cont inues.
A_Query(Sus_Cause)
To HLRA_Monitoring
-
Figure 11.1.2.5: Process HLRA_Resume (sheet 1 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)85Release 1999
Process HLRA_Resume 2(3)
IDLE
Set_Trigger_A_Idle(Sus_Cause)
From HLRA_Request_Manager
A_QueryTo HLRA_Monitoring
RESUME_PENDING
Set_Trigger_Recall_End
From HLRA_Request_Manager
Query_Status
To HLRA_Recall_Manager
RESUME_PENDING
A_IdleFrom HLRA_Monitoring
Select_First_Req
To HLRA_Request_ManagerNOTE: All requests can be resumed
WAIT_FOR_SELECTION
Recall_End
From HLRA_Recall_Manager
Select_Active_Req
To HLRA_Request_Manager
Set_Trigger_Recall_End
From HLRA_Request_Manager
Query_Status
To HLRA_Recall_Manager
RESUME_PENDING
Figure 11.1.2.5: Process HLRA_Resume (sheet 2 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)86Release 1999
Process HLRA_Resume 3(3)
WAIT_FOR_SELECTION
Select_Resp
From HLRA_Request_Manager
Start_T11
RESUMING
A_IdleFrom HLRA_Monitoring RecallFrom HLRA_
Recall_Manager
Not_Selected
From HLRA_Request_Manager
RESUME_PENDING
RESUMING
T11 expiry
Select_Active_Req
To HLRA_Request_Manager
WAIT_FOR_SELECTION
A_IdleFrom HLRA_Monitoring
Set_All_Active
To HLRA_Request_Manager
-
RecallFrom HLRA_Recall_Manager
Stop T11
RESUMEPENDING
Figure 11.1.2.5: Process HLRA_Resume (sheet 3 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)87Release 1999
Process HLRA_Monitoring(1,1) 1(2)
Signals to / from lef t are to / fromCCBS_Coordinator_HLR unlessshown otherwise.Signals to / from right are to / fromHLRA_Resume uless shownotherwise
IDLE
IDLE
A_Query(Sus_Cause)
Start_Reporting
WAIT_FOR_ANSWER
*(IDLE)
Stop_Monitoring
Stop_Report ing
IDLE
WAIT_FOR_ANSWER
Event_Report(Status)
Status =CCBS_Idle
Sus_Cause= NrcNOTE: Using the previous history
data i.e. Sus_Cause value to preventany unnecessary signaling is onepossible implementation. Themanufacturer is allowed to use othertechnics to achieve eff icient solution.
A_Idle
MONITORING
Yes
ELSE
Yes
No
Figure 11.1.2.6: Process HLRA_Monitoring (sheet 1 of 2)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)88Release 1999
Process HLRA_Monitoring(1,1) 2(2)
Signals to / from lef t are to / fromCCBS_Coordinator_HLR unlessshown otherwise.Signals to / from right are to / fromHLRA_Resume uless shownotherwise
MONITORING
Event_Report(status)
status
A_Idle
MONITORING
MONITORING
Location_Update
CCBSsupported in
VLR
A_Idle
IDLEMONITORING
CCBS_Idle
ELSE
Yes
No
Figure 11.1.2.6: Process HLRA_Monitoring (sheet 2 of 2)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)89Release 1999
Procedure HLRA_CCBS_Check_Interactions 1(1)
VLR areaknown
CCBS supportedin current MSCVLR
CAMEL invokedin the originalcall
CAMEL supportedin MSC
Result :=Pass
Result :=Pass
Result :=Fail
Yes
No
Yes
No
Yes
No
Yes
No
Figure 11.1.2.7: Procedure HLRA_CCBS_Check_Interactions
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)90Release 1999
Procedure in the MSC to notifythe gsmSCF of the CCBS invocation
Procedure CCBS_Notify_SS_Invocation 1(1)
Signals to/from the leftare to/from the gsmSCF.
SS-CSI storedin HLR?
SS InvocationNotify (State)
SS-CSI appliesto CCBS?
Yes
Yes
No
No
Figure 11.1.2.8: Procedure CCBS_Notify_SS_Invocation
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)91Release 1999
11.2 Destination Network Processes
11.2.1 Procedures in GMSC Figure 11.2.1.1: Procedure CCBS_MT_GMSC_Check_CCBS_Call
This procedure checks from the IAM message whether the call is CCBS call. If that is the case the CCBS Call parameter is set to the Send Routeing Info message. This functionality shall be applied only to the initial call leg. The procedure initialises also the CCBS Possible variable as True, the variable is accessible to all CCBS specific procedures in the GMSC.
Figure 11.2.1.2: Procedure CCBS_MT_GMSC_Check_CCBS_Indicators
This procedure sets the CCBS_Call indicator to the outgoing IAM message when needed. This functionality shall be applied only to the initial call leg.
Figure 11.2.1.3: Procedure CCBS_MT_GMSC_Remove_Indicators_Store_FWT
This procedure removes CCBS_Call indicator from the forwarded IAM message and also stores the forwarding type. It also checks whether subscriber B can be target of CCBS Requests and stores that information for later use.
Figure 11.2.1.4: Procedure CCBS_MT_GMSC_Remove_Indicators
This procedure removes CCBS_Call indicator from the outgoing IAM message. CCBS activation is not possible for this call because T-CSI modified destination address.
Figure 11.2.1.5: Procedure CCBS_MT_GMSC_Check_CCBS_Possible
This procedure contains the core logic to handle various interactions with CAMEL, OR and received Release message content. The procedure alters CCBS specific global variable CCBS Target which controls setting of the diagnostic field in the Release message towards the originating network.
Global variables Reconnect and Resume Call are specific to CAMEL and OR interaction respectively. They are initialised and updated in the process MT_GMSC or MT_CF_MSC, refer to TS 23.018.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)92Release 1999
Procedure CCBS_MT_GMSC_Check_CCBS_Call 1(1)
Reconnect = Trueor Resume Call = True
Test the indicatorin received IAMmessage
CCBS Call Indicator
= True
CCBS Callparameter
:= False
CCBS Callparameter :=
True
CCBS Callparameter :=
False
This global variable is specific to CCBS handling.It is set to True by default but indication form HLRor the first call leg's result may lead CCBS NotPossible case. This variable coverns the functionalityof the other CCBS specific procedures in GMSC
CCBS Possible:= True
No
Yes
No
Yes
Figure 11.2.1.1: Procedure CCBS_MT_GMSC_Check_CCBS_Call
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)93Release 1999
Procedure CCBS_MT_GMSC_Check_CCBS_Indi cators 1(1)
Reco nnect = Trueor Resu me Call = True
CCBS Call
Te st the para meter recei vedin SRI. I f absent, False exi tshal be taken.
Keep CCBS Call
indicator
Indicator to theoutgoing IAM message
CCBS Cal lIndicator :=
True
CCBS Cal lIndicator :=
False
CCBS Cal lIndi cator :=
False
No
Yes
Ye s
No
True
False
Figure 11.2.1.2: Procedure CCBS_MT_GMSC_Check_CCBS_Indicators
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)94Release 1999
Procedure CCBS_MT_GMSC_Remove_Indicators_Store_FWT 1(1)
Reconnect = TrueorResume Call = True
Test the parameter receivedin SRI Ack. If absent Falseexit shall be taken
CCBS Target
FWD onBusy
CCBS is possible only whencall is forwarded on busy
ALter GMSC internalvariable. Default isTrue
CCBS Possible:= False
CCBS Call
RemoveCCBS Indicator
No
Yes
True
False
False
True
Yes
No
Figure 11.2.1.3: Procedure CCBS_MT_GMSC_Remove_Indicators_Store_FWT
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)95Release 1999
Procedure CCBS_MT_GMSC_Remove_Indicators 1(1)
Reconnect = TrueorResume Call = True
CCBS Possible:= False
CCBS Call
RemoveCCBS Indicator
No
Yes
Yes
No
Figure 11.2.1.4: Procedure CCBS_MT_GMSC_Remove_Indicators
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)96Release 1999
Procedure CCBS_MT_GMSC_Check_CCBS_Possible 1(1)
CCBSPossible
Test the GMSC internalvariable. Does the previous processingindicate that CCBS isnot possible?
Reconnect = TrueorResume Call = True
Forwardedcall
Cause = BusyorCause = No circuitchannel available
CCBS Target:= True
CCBS Target:= False
Receivedmessage
CCBS Targetparameter set
CCBS Possible:= False
CCBS Target:= False
CCBS Target:= True
CCBS Possiblediagnostic set
CCBS Possible:= False
Alter the GMSC internalvariable. CCBS activationis no longer possible
CCBS Target:= False
Alter the GMSC internalvariable. The variablecontrols setting of thediagnostic value
Call Completion TreatmentIndicator set to Reject CallCompletion Service Request?
Call CompletionTreatment Indicatorpresent in SII2?
True
No
Yes
Yes
No
No
Resume _Call_Handling
No
Yes
Release
No
Yes
Yes
False
Yes
No
Yes
No
Figure 11.2.1.5: Procedure CCBS_MT_GMSC_Check_CCBS_Possible
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)97Release 1999
11.2.2 Processes and procedures in HLR Figure 11.2.2.1: Block diagram of HLRB_processes
Figure 11.2.2.2: Process HLRB_Request_Manager
This process has the task of controlling the queue and determining whether requests to be processed are present in the queue or not.
The process has two states "idle" and "active". In the "idle" state there are no "operative" requests in the queue i.e. there are only suspended requests or no requests at all. In the "active" state there is at least one "operative" request in the queue which needs processing. A transition from "idle" to "active" will trigger this process to start the process "HLRB_Recall_Manager". Only a transition from "active" to "idle" will result in this process stopping the process "HLRB_Recall_Manager".
Figure 11.2.2.3: Process HLRB_Request
This process represents an individual CCBS request on the destination side. Reception of signals on the external interface (SSAP signalling) are handled by this process.
Retention is handled by this process. The individual request is informed by the Recall manager process about the outcome of the CCBS Call. The individual request is in charge to decide on whether it will stay in the destination queue (retention) or not according to its data stored.
T7 expiry is controlled by the individual request in that way, that it remembers T7 expiry when it is the selected request (i.e. a CCBS Recall has been initiated for this request). The event is detected after the CCBS Recall when retention has kept the request in the queue.
Figure 11.2.2.4: Process HLRB_Recall Manager
This process is in charge of the recall handling. It is started and stopped by the process "HLRB_Request_Manager" depending on whether there are operative requests in the terminating queue or not.
As soon as this process is started, it will start the process "HLRB_Monitoring" and wait for a response from this process. The response indicates that user B is idle guarded i.e. a CCBS Recall can be initiated. Hence, the process asks the request manager for selection of an individual request from the terminating queue.
When an individual process is selected, the process initiates a CCBS Recall via the individual request (since the external interface is tied to the individual request), starts T9 and takes over control of the blocking function while waiting for the CCBS Call. Control of blocking is done by sending the signal "Recall_Block" to process "HLRB_Blocking".
While waiting for the outcome of the CCBS Call, the process will be informed either by the selected individual request in the case of negative outcome (suspension or cancellation, both hidden to the process), or by process "HLRB_Monitoring" in the case the CCBS Call has reached the terminating PLMN.
Figure 11.2.2.5: Process HLRB_Monitoring
This process takes care of monitoring events received from MSC/VLR and detects potential conditions for initiating a CCBS Recall.
The process is controlled by the "HLRB_Recall_Manager" process which was formerly in charge of detecting the recall condition.
When the process is started, it invokes the monitoring function in the MSC/VLR and awaits the first event report. The process keeps track of the subscriber state changes by running a state machine which reflects the subscriber states. When there is a transition from subscriber state "not idle" to "idle", then T8 is started. As soon as T8 expires, the process changes state again in order to remember that the subscriber is now idle guarded and a recall could be initiated
Whether a CCBS Recall is initiated or not depends on whether the process "HLRB_Recall_Manager" has asked for this information by sending a "B_Query" signal to the monitoring process. The process "HLRB_Monitoring" gives this information only if the "B_Query" signal has been received. This is done by sending the signal "B_Guarded" to the Recall Manager and it is only done once per request. The monitoring process keeps track on whether a query was received or not by appropriate state changes.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)98Release 1999
As the monitoring process is in charge for the idle guard function, it also controls the blocking of incoming calls during the idle guard time (T8). Hence, when the recall manager process has sent a "B_Query" (i.e. a CCBS request needs to be processed) then the monitoring process starts the corresponding blocking along with T8. The blocking is only stopped if T8 does not expire. If T8 expires, then blocking is still needed for the following CCBS Recall. The responsibility for controlling the blocking (i.e. switching it off) is given to the recall manager process.
Figure 11.2.2.6: Process HLRB_Blocking
This process controls the CCBS Call delivery reporting when the processes are in the proper state. This means that the reporting functionality of the outcome of the CCBS Call is not blindly triggered whenever there is a terminating CCBS Call.
The process has three different states: "idle", "Blocking" and "Recall Blocking". The "Idle" state reflects the case when blocking is disabled. In the "Blocking" state all incoming calls are blocked (e.g. while T8 is running). The "Recall Blocking" state allows one CCBS Call to pass, which will trigger the CCBS Call delivery reporting in the MSC/VLR via the TS 23.018 process "SRI_HLR". When this happens, the process will automatically change back to state "Blocking" as no other CCBS Call is expected for now.
When the process has detected that destination B is idle, it will start the blocking. Hence, the blocking process will change state to "Blocking". As soon as the process "HLRB_Recall_Manager" has initiated a CCBS Recall, it will cause a state change in the blocking process to state "Recall Blocking". When the CCBS Call is received, "result = OK" indication in signal "SRI_Received_Ack" will trigger the reporting mechanism for CCBS Call delivery via a PRN request in the TS 23.018 process "SRI_HLR"
Figure 11.2.2.7: Procedure HLRB_CCBS_Check_Interactions
This procedure checks whether the request is frozen due to the supplementary service interactions.
Figure 11.2.2.8: Procedure CCBS_Handling_HLR
This procedure is called during Send Routeing Info message handling in the HLR. If blocking is active only CCBS Calls can proceed, others will fail with busy or forward indication. For CCBS Call CCBS Call Indicator is set to the Provide Roaming Number message.
Figure 11.2.2.9: Procedure CCBS_Report_PRN_Failure
This procedure is called if Provide Roaming Number returns an error. For CCBS call is then generated an internal call report.
The handling of multiple requests in HLR B can be further clarified by the diagram shown in figure 11.2.2.1.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)99Release 1999
Block HLRB_Processes 1(1)
HLRB_Request_Manager(1,1)
HLRB_Request(0,5)
Instances of processRequest can be createdby the process Request_Manager
HLRB_Recall_Manager(1,1)
HLRB_Blocking(1,1)
HLRB_Monitoring(1,1)
Originatingnetwork A
CCBS_Request_AckCCBS_Re ject_Request
CCBS_Request
Start_Recall_ManagerStop_Recall_ManagerSelect_Request_Response
Select_Request
Selection_Req
Re-Acti vatedDe letedInactive
Remote_User_FreeCCBS_Cance lCCBS End
CCBS_ResumeCCBS_CancelCCBS_Suspend
Send_RUFRecall_Report
End
Start_BlockingRecall_Block
Start_Moni toringStop_MonitoringB_Query
Cal l_DeliveryB_Guarded
SRI_Received_Ack
SRI_ReceivedStart_ReportingStop_Reporting
Event_ReportCCBS_Call_Report
CCBS_Coordinator_HLR
Start_BlockingStop_Blocking
Location_Update
Figure 11.2.2.1: HLRB_Processes
Description of above signals
Relation Originating Network and HLRB_Request_Manager
CCBS_Request: When the originating network attempts to activate CCBS, it sends a CCBS_Request message to HLRB Request Manager.
CCBS_Request_Ack: When the HLRB_Request_Manager acknowledges the activation, it sends CCBS_Request Ack to originating network.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)100Release 1999
CCBS_Reject: If the HLRB_Request_Manager does not accept the activation attempt, it sends CCBS_Reject to the originating network indicating long term or short term denial.
Relation Originating Network and HLRB_Request
CCBS_Suspend: If the originating network suspends a CCBS Request, it sends CCBS_Suspend to HLRB Request.
CCBS_Resume: When a request that was suspended is now resumed, the originating network sends a CCBS_Resume message to HLRB Request.
CCBS Cancel: When a request is cancelled in the originating network, it sends a CCBS Cancel message to HLRB Request.
Remote_User_Free: HLRB_Request sends Remote_User_Free to the originating network to inform the originating network that destination B is now idle.
CCBS_Cancel: If a CCBS Request is cancelled in the destination network, HLRB_Request sends CCBS_Cancel to the originating network.
TC_END: If a CCBS Call is successfully delivered to destination B, then HLRB_Request ends the dialogue with the originating network by sending a TC_END message.
Relation HLRB_Request_Manager and HLRB_Request
Selection_Request: Once destination B is idle guarded, then the HLRB_Request_Manager will select the first non-suspended request in the queue for processing by sending "Select_Request" to HLRB_Request.
Inactive: When a CCBS Request is either suspended or unselectable due to the supplementary service interaction, HLRB_Request informs HLRB_Request_Manager so that the queue status can be updated.
Re-Activated: When either a suspended CCBS Request is resumed or the supplementary service interaction with the request ends, then HLRB_Request informs HLRB_Request_Manager so that the queue status can be updated.
Deleted: When a CCBS Request is cancelled, then HLRB_Request informs HLRB_Request_Manager so that the queue status can be updated.
Relation HLRB_Recall_Manager and HLRB_Blocking
Stop_Blocking: When the Recall manager process is stopped by the Request Manager process or the Recall manager receives and ‘End’ signal from the Request manager, the Recall manager sends "Stop_Blocking" to HLRB_Blocking.
Recall_Block: When a "Send RUF" signal is sent to HLRB_Request, the HLRB_Recall_Manager also sends "Recall Block" to HLRB_Blocking so that one CCBS Call can be delivered to destination B, but other normal incoming calls are blocked.
Relation HLRB Recall_Manager and HLRB_Request_Manager
Select_Request: On reception of a "B_Guarded" signal, the Recall manager sends "Select_Request" to the Request manager. The Request manager then selects the first non-suspended request in the queue for processing.
Start_Recall_Manager: When a CCBS Request is successfully activated, the Request manager sends "Start_Recall_Manager" to HLRB_Recall_Manager which subsequently causes the recall manager process to start the monitoring process.
Stop_Recall_Manager: The Request manager can stop the Recall manager process by sending a "Stop_Recall_Manager" signal
Select_Request_Response: When the Request manager has selected a request for processing it sends a response to the recall manager causing the recall manager to initiate a CCBS Recall.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)101Release 1999
Relation HLRB_Recall_Manager and HLRB_Request
Send_RUF: The Recall manager requests the individual process to send a Remote User Free indication to the originating network by sending a "Send_RUF" signal to the individual process.
Recall_Report: The Recall manager informs the individual process of the result of processing a CCBS Recall by sending a "Recall Report" signal.
END: When a CCBS Request is suspended or cancelled the HLRB_Request process sends an "End" signal to the Recall Manager process.
Relation HLRB_Recall_Manager and HLRB_Monitoring
Start_Monitoring: When the Recall manager process is started by the Request manager process, the Recall manager sends "Start_Monitoring" to the HLRB_Monitoring process to request the status of destination B
Stop_Monitoring: When the Recall manager process is stopped by the Request manager process, the Recall manager sends "Stop_Monitoring" to the HLRB_Monitoring process.
B_Query: HLRB_Recall_Manager requests the HLRB_monitoring process to get informed when destination B has become idle guarded.
Relation HLRB_Monitoring and HLRB_Recall_Manager
B_Guarded: HLRB_Monitoring informs the HLRB_Recall_Manager that destination B has become idle guarded.
Call_Delivery: HLRB_Monitoring informs the HLRB_Recall_Manager about the delivery of the CCBS call.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)102Release 1999
Process HLRB_RequestManager 1(3)
Signal s to and from the leftare to and from the originatingnetwo rk unle ss sp ecifie d otherw ise
IdleIn this state th ere are either no CCBS Req uestsin the queue or the queue contains only inactive(su spended or quiesent) requests
IdleCCBS_Request(Retain_supported )
Note: Retention informationma y be recei ved in theCCBS Request. Refer to ETS 300 3 58
From HLRB_Request Re-Activated Deleted From HLRB_
Request
CCBS serviceprovisione d indestinationnetwork
Update requestqueue
Up date requestqu eue
Reason :=long te rm
denial
queuefull
HLRB_Request
Reason :=short term
denial
To HLRB_Recal l_Manage r
Start_Recall _Manager
Update requestqueue CCBS_Reje ct_
Requ est(Reason)
Retention su pportedin the Destina tion Bne twork
- Active -
Retain _supported:= Fal se
CCBS_Request_Ack(Retain_supported )
NOTE : Retention informationmay be sent in the CCBS Request AckRe fer to ETS 3 00 358
Store Retainsupported
To HLRB_Recal l_Manager
Start_Re call_Manager
In this state, there isat least one active reque st Active
No
Yes
No
Yes
No Yes
Figure 11.2.2.2: Process HLRB_REQUEST_MANAGER (sheet 1 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)103Release 1999
Process HLRB_RequestManager 2(3)
Active
Deleted From HLRB_Request
Upd ate requestqueue
Que ueempty
Only inactiverequests inqueue
Stop_Rec all_Man ger
To HLRB_Recall_Mana ger
Idle
Continue_Monitoring
To CCBS_Coordinator_HLR
-
Inacti ve From HLRB_Request
Update requestqueue
CCBS_Request(Retain_supported)
Note: Retention informationm ay b e rece ived in theCCBS Reque st. Refer to ETS 300 358
queuefull
HLRB_Reques t
Update requestqueue
Re tention supportedin the Des tinatio n Bnetwork
Retain_su pported:= False
CCBS_Request_Ack (Retain_supported)
NOTE: Rete ntion informationmay be sent in the CCBSReques t AckRefer to ETS 3 00 358
Store Retainsu pported
Acti ve
Rea son :=short term
denial
CCBS_Reject_Request(Reas on)
No
Yes
No
Yes
No
No Yes
Yes
Figure 11.2.2.2: Process HLRB_REQUEST_MANAGER (sheet 2 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)104Release 1999
Process HLRB_RequestManager 3(3)
Active
Select_Request
From HLRB_Recall_Manager
Select the firstactive request
Selection_Request
To HLRB_Request
Select_Request_Response(Request )
To HLRB_Recall_Manager
-
Re-Activated From HLRB_request
Update requestqueue
Figure 11.2.2.2: Process HLRB_REQUEST_MANAGER (sheet 3 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)105Release 1999
Process HLRB_Request 1(6)
Signals to and from the lef tare to and from the originatingnetwork unless specif ied otherwise
Start T7
Operative
Operative
From HLRB_Request_Manager
Selection_Request SS_Event
From Supplementaryservice handling indicatingthat service status has beenchanged
HLRB_CCBS_Check_
Interactions
Result
InactiveTo HLRB_Request_Manager
Selected QuiescentOperative Operative
Fail
Pass
Figure 11.2.2.3: Process HLRB_REQUEST (sheet 1 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)106Release 1999
Process HLRB_Request 2(6)
*(Selected)
T7_Expiry
Reason :=T7_Expiry
CCBS_Cancel(Reason)
Deleted To HLRB_Request_Manager
CCBS_Cancel
Figure 11.2.2.3: Process HLRB_REQUEST (sheet 2 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)107Release 1999
Process HLRB_Request 3(6)
Selected
Send_RUF From HLRB_Recall_Manager
CCBS_Suspend
CCBS_Cancel T7_Expiry SS_Event
From Supplementaryservice handling indicatingthat service status has beenchanged
To HLRB_Request_Manager Inactive Deleted To HLRB_
Request_Manager
Remote_User_Free
To HLRB_Recall_Manager End End To HLRB_
Recall_Manager
Stop T7
- Suspended
Figure 11.2.2.3: Process HLRB_REQUEST (sheet 3 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)108Release 1999
Process HLRB_Request 4(6)
Selected
Recal l_Report(Outcome)
From HLRB_Reca ll_Manager
Outcome
Re ason:=Outcome
Re tainsupported
CCBS_Cancel
CCBSEnd
CCBS_Cancel(Reason)
Dele ted To HLRB_Re quest_Manager
Operative
T9_Expiry
NDUB
Fai lure Success
Fa lse
True
Figure 11.2.2.3: Process HLRB_REQUEST (sheet 4 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)109Release 1999
Process HLRB_Request 5(6)
Suspended
CCBS_Resume SS_Event
From Supplementaryservice handling indicatingthat service status has beenchanged
To HLRB_Request_Manager Re-Activated
HLRB_CCBS_Check_
Interactions
Result
Operative QuiescentSuspended Suspended
Fail
Pass
Figure 11.2.2.3: Process HLRB_REQUEST (sheet 5 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)110Release 1999
Process HLRB_Request 6(6)
QuiescentOperative
QuiescentSuspended
SS_Event From Supplementaryservice handling indicatingthat service status has beenchanged
SS_Event From Supplementaryservice handling indicatingthat service status has beenchanged
CCBS_Resume
HLRB_CCBS_Check_
Interactions
HLRB_CCBS_Check_
Interactions
Result Result
Re-ActivatedTo HLRB_Request_Manager
QuiescentOperative Operative Quiescent
Suspended Suspended QuiescentOperative
Pass
Fail Fail
Pass
Figure 11.2.2.3: Process HLRB_REQUEST (sheet 6 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)111Release 1999
Process HLRB_RecallManager 1(3)
Idle
Idle
Start_Recall_Manager
From HLRB_Request_Manager
Start_Monitoring
To HLRB_Monitoring
B_Query To HLRB_Monitoring
Wait_For_B_Guarded
Wait_For_B_Guarded
B_Guarded From HLRB_Monitoring
Select_Request
To HLRB_Request_Manager
Wait_For_Selection_Request
Stop_Recall_Manager
From HLRB_Request_Manager
Stop_Monitoring
To HLRB_Monitoring
Stop_Blocking
To HLRB_Blocking
Idle
Figure 11.2.2.4: Process HLRB_RECALL_MANAGER (sheet 1 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)112Release 1999
Process HLRB_RecallManager 2(3)
Wait_For_Selectio_Response
Select_Request_Response(Request )
From HLRB_Request_Manager
Send_RUF To HLRB_Request
Recall_Block
To HLRB_Blocking
Start T9
Wait_For_CCBS_Call
Stop_RecallManager
From HLRB_Request_Manager
Stop_Monitoring
To HLRB_Monitoring
Stop_Blocking
To HLRB_Blocking
Idle
Figure 11.2.2.4: Process HLRB_RECALL_MANAGER (sheet 2 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)113Release 1999
Process HLRB_RecallManager 3(3)
Wait_For_CCBS_Call
End From HLRB_Request
Stop T9
Stop_Blocking
To HLRB_Blocking
B_Query To HLRB_Monitoring
Wait_For_B_Guarded
Call_Delivery(Outcome)
From HLRB_Monitoring orCCBS_Report_PRN_Failure
Stop T9
Recall_Report(Outcome)
To HLRB_Request
T9 Expiry
Outcome :=T9 Expiry
Stop_Recall_Manager
From HLRB_Request_Manager
Stop T9
Stop_Monitoring
To HLRB_Monitoring
Stop_Blocking
To HLRB_Blocking
Idle
Figure 11.2.2.4: Process HLRB_RECALL_MANAGER (sheet 3 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)114Release 1999
Process HLRB_Monitoring 1(7)
Idle
Idle
Start_Monitoring
From HLRB_Recall_Manager
CCBSsupported in
VLR
Start_Reporting
Wait
To CCBS_Coordinator_HLR
Yes
No
Figure 11.2.2.5: Process HLRB_MONITORING (sheet 1 of 7)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)115Release 1999
Process HLRB_Monitoring 2(7)
Wait
Event_Report(Status)
From CCBS_Coordinator_HLR B_Query From HLRB_
Recall_ManagerStop_Monitoring
From HLRB_Recall_Manager
Status Stop_Reporting
To CCBS_Coordinator_HLR
Start T8
Start_Blocking To HLRB_Blocking
B_Not_IdleNo_B_Query
B_IdleNo_B_Query Idle
Wait
From CCBS_Coordinator_HLR Location Update
CCBS supportedin the MSCVLR
Start_Reporting
To CCBS_Coordinator_HLR
-
CCBS_Idle
CCBS_Not_IdleCCBS_Not_Reachable
Yes
No
Figure 11.2.2.5: Process HLRB_MONITORING (sheet 2 of 7)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)116Release 1999
Process HLRB_Monitoring 3(7)
B_Not_IdleNo_B_Query
Event_Report(Status)
Status
Start T8
Start_BlockingTo HLRB_Blocking
B_IdleNo_B_Query-
B_Query From HLRB_Recall_Manager
B_Not_IdleB_Query
Stop_Monitoring
From HLRB_Recall_Manager
Stop_Reporting
Idle
B_Not_IdleNo_B_Query
CCBS_Call_Report(Outcome,Status)
Call_Delivery(Outcome)
To HLRB_Recall_Manager
Status
- B_IdleNo_B_Query
Location Update
CCBS supportedin the MSCVLR
Start_Reporting
-
From CCBS_Coordinator_HLR
To CCBS_Coordinator_HLR
From CCBS_Coordinator_HLR
To CCBS_Coordinator_HLR
From CCBS_Coordinator_HLR
CCBS_Idle
CCBS_Not_IdleCCBS_Not_Reachable
CCBS_Not_IdleCCBS_Not_Reachable
CCBS_Idle
Yes
No
Figure 11.2.2.5: Process HLRB_MONITORING (sheet 3 of 7)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)117Release 1999
Process HLRB_Monitoring 4(7)
B_Not_IdleB_Query
Event_Report(Status)
From CCBS_Coordinator_HLR
Stop_Monitoring
From HLRB_Recall_Manager
Status Stop_Report ing
To CCBS_Coordinator_HLR
Start T8
Start_Blocking
To HLRB_Blocking
- B_IdleB_Query Idle
B_Not_IdleB_Query
From CCBS_Coordinator_HLR Location Update
CCBS supportedin the MSCVLR
Start_Reporting
To CCBS_Coordinator_HLR
-
CCBS_Idle
CCBS_Not_IdleCCBS_Not_Reachable
Yes
No
Figure 11.2.2.5: Process HLRB_MONITORING (sheet 4 of 7)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)118Release 1999
Process HLRB_Monitoring 5(7)
B_IdleNo_B_Query
Event_Report(Status)
From CCBS_Coordinator_HLR T8 Expiry B_Query From HLRB_
Recall_ManagerStop_Monitoring
From HLRB_Recall_Manager
Status Stop T8
Stop_Blocking
To HLRB_Blocking
Stop_Report ing
To CCBS_Coordinator_HLR
B_Not_IdleNo_B_Query - B_Idle_Guarded
No_B_QueryB_Idle
B_Query Idle
B_IdleNo_B_Query
CCBS_Call_Report(Outcome,Status)
From CCBS_Coordinator_HLR
From CCBS_Coordinator_HLR Location Update
CCBS supportedin the MSCVLRCall_
Delivery(Outcome)
To HLRB_Recall_Manager
Stop T8
StatusTo HLRB_Blocking
Stop_Blocking
Start_Report ing
To CCBS_Coordinator_HLR
- B_Not_IdleNo_B_Query
B_Not_IdleNo_B_Query -
CCBS_Not_IdleCCBS_Not_Reachable
CCBS_Idle
No
Yes
CCBS_Idle
CCBS_Not_IdleCCBS_Not_Reachable
Figure 11.2.2.5: Process HLRB_MONITORING (sheet 5 of 7)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)119Release 1999
Process HLRB_Monitoring 6(7)
B_IdleB_Query
Event_Report(Status)
From CCBS_Coordinator_HLR T8 Expiry Stop_
MonitoringFrom HLRB_Recall_Manager
Status Stop T8
Stop T8Stop_Blocking
To HLRB_Blocking
To HLRB_Blocking
Stop_Blocking B_Guarded To HLRB_
Recall_ManagerStop_Reporting
To CCBS_Coordinator_HLR
- B_Not_IdleB_Query
B_Idle_GuardedNo_B_Query Idle
B_IdleB_Query
CCBS_Call_Report(Outcome,Status)
From CCBS_Coordinator_HLR
From CCBS_Coordinator_HLR Location Update
CCBS supportedin the MSCVLRCall_
Delivery(Outcome)
To HLRB_Recall_Manager
Stop T8
StatusTo HLRB_Blocking
Stop_Blocking
Start_Reporting
To CCBS_Coordinator_HLR
- B_Not_IdleB_Query
B_Not_IdleB_Query
B_IdleB_Query
CCBS_Not_IdleCCBS_Not_Reachable
CCBS_Idle
No
Yes
CCBS_Idle
CCBS_Not_IdleCCBS_Not_Reachable
Figure 11.2.2.5: Process HLRB_MONITORING (sheet 6 of 7)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)120Release 1999
Process HLRB_Monitoring 7(7)
B_Idle_GuardedNo_B_Query
Event_Report(Status)
From CCBS_Coordinator_HLR B_Query From HLRB_
Recall_ManagerStop_Monitoring
From HLRB_Recall_Manager
StatusStart_Blocking
To HLRB_Blocking
Start T8 B_Guarded To HLRB_Recall_Manager
Stop_Reporting
To CCBS_Coordinator_HLR
B_Not_IdleNo_B_Query
B_IdleNo_B_Query - Idle
B_Idle_GuardedNo_B_Query
CCBS_Call_Report(Outcome,Status)
From CCBS_Coordinator_HLR
From CCBS_Coordinator_HLR Location Update
Call_Delivery(Outcome)
To HLRB_Recall_Manager
CCBS supportedin the MSCVLR
Start_Reporting
To CCBS_Coordinator_HLR
Status
- B_Not_IdleNo_B_Query
B_Not_IdleNo_B_Query
CCBS_Idle
CCBS_Not_IdleCCBS_Not_Reachable
Yes
No
CCBS_Idle
CCBS_Not_IdleCCBS_Not_Reachable
Figure 11.2.2.5: Process HLRB_MONITORING (sheet 7 of 7)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)121Release 1999
Process HLRB_BLOCKING 1(3)
*
Stop_Blocking
From HL RB_Recal l_Manager o rHLRB_Moni toring
Idle Idle
Idle
SRI_ Rece ived Fro m GSM 03.18SRI_HLR(CCBS_Handl ing_HLR)
Start_Blocking
From HL RB_Mo nitoring
Result := OK
SRI_ Rece ived_Ack(Resul t) To GSM 03.18
SRI_HLR(CCBS_Handl ing_HLR)
- Blocking
Figure 11.2.2.6: Process HLRB_BLOCKING (sheet 1 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)122Release 1999
Process HLRB_BLOCKING 2(3)
Blocking
From GSM 03.18SRI_HLR (CCBS_Handling_HLR)
SRI_Received
From HLRB_Recall_Manager
Recall_Block
StopBlocking
From HLRB_Monitoring
See TS 23.018 Handle_CFB RecallBlocking Idle
Result =Forward?
max queue size > 0and CCBS supportedin the VMSC?
Result =Busy?
CCBS Target:= True
CCBS Target:= False
Result:= Fail
Result :=Forward
max queue size > 0and CCBS supportedin the VMSC?
Result := Busy,CCBS Possible
Result := Busy,CCBS Not Possible
To GSM 03.18SRI_HLR (CCBS_Handling_HLR)
SRI_Received_Ack(Result,CCBS Target)
-
Yes
No
Yes
No
No
Yes
Yes
No
Figure 11.2.2.6: Process HLRB_BLOCKING (sheet 2 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)123Release 1999
Process HLRB_BLOCKING 3(3)
Handle_CFB
Result =Forward?
max queue size > 0and CCBS supportedin the VMSC?
Result =Busy?
CCBS Target:= True
CCBS Target:= False
Result:= Fail
Result :=Forward
To GSM 03.18SRI_HLR (CCBS_Handling_HLR)
SRI_Received_Ack(Result)
RecallBlocking
max queue size > 0and CCBS supportedin the VMSC?
Result := Busy,CCBS Possible
Result := Busy,CCBS Not Possible
RecallBlocking
SRI_Received
From GSM 03.18SRI_HLR (CCBS_Handling_HLR)
CCBSCall?
CCBSsupported in
VMSC?
Keep CCBS CallIndicator :=
True
Keep CCBS CallIndicator :=
False
Result := OK
SRI_Received_Ack(Result)
Blocking
See TS 23.018
To GSM 03.18SRI_HLR (CCBS_Handling_HLR)
Yes
No
Yes
No
No
Yes
No
Yes
NoNo
Yes
Yes
Figure 11.2.2.6: Process HLRB_BLOCKING (sheet 3 of 3)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)124Release 1999
Procedure HLRB_CCBS_Check_Interactions 1(1)
CFU active &operative forthe request
BAIC active &operative forthe request
BIC-Roam active & operative forthe request
Result :=Pass
Result :=Fail
No
Yes
No
Yes
No
Yes
Figure 11.2.2.7: Procedure HLRB_Check_Interactions
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)125Release 1999
Procedure CCBS_Handling_HLR 1(1)
SRI_Received To HLRB_Blocking
Wait ForAnswer
SRI_Received_Ack (Result) From HLRB_Blocking
Result
CCBS CallSet neg. respForwarding
violation
Set neg.respBusy
subscriber
Set ForwardingInfo
Set CCBS CallIndicator in PRN
Set resultFrom resultcode receivedin SRI_Received _Ack
OK
Fail
Busy Forward
Yes
No
Figure 11.2.2.8: Procedure CCBS_Handling_HLR
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)126Release 1999
Procedure CCBS_Report_PRN_Failure 1(1)
CCBS call
Outcome :=Failure
Call_Delivery(Outcome)
To HLRB_Recall_Manager
Yes
No
Figure 11.2.2.9: Procedure CCBS_Report_PRN_Failure
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)127Release 1999
11.2.3 Procedures in MSC/VLR Figure 11.2.3.1: Procedure CCBS_MT_MSC_Check_Forwarding
This procedure is called to set the CCBS Target variable. That variable is used in later phase to set the correct diagnostic value to the Release message.
Figure 11.2.3.2: Procedure CCBS_Handle_PRN
This procedure is called to store CCBS call indicator when roaming number is reserved in the VLR.
Figure 11.2.3.3: Procedure CCBS_ICH_Set_CCBS_Call_Indicator
This procedure is called when VLR receives Send Info For Incoming Call message. If MSRN is related to the CCBS call, CCBS call indicator is set for call handling.
Figure 11.2.3.4: Procedure CCBS_ICH_MSC_Report_Failure
This procedure is called when CCBS call fails in the destination MSC and the reason is detected in the MSC side.
Figure 11.2.3.5: Procedure CCBS_ICH_VLR_Report_Failure
This procedure is called when CCBS call fails in the destination MSC and the reason is detected in the VLR side.
Figure 11.2.3.6: Procedure CCBS_ICH_Report_Not_Reachable
This procedure is called when call fails in the destination MSC with special cause of Not_Reachable. On normal call Not_Reachable message is sent to the monitoring process, on CCBS call subscriber is reported being absent.
Figure 11.2.3.7: Procedure CCBS_ICH_Handle_NDUB
This procedure is called when call encounters NDUB condition in the destination MSC. It is a network option to forward the call or release the call.
Figure 11.2.3.8: Procedure CCBS_ICH_Handle_UDUB
This procedure is called when call encounters UDUB condition in the destination MSC.
Figure 11.2.3.9: Procedure CCBS_ICH_MSC_Report_Success
This procedure is called when CCBS call is successfully delivered in the destination MSC and the event is detected in the MSC side.
Figure 11.2.3.10: Procedure CCBS_ICH_VLR_Report_Success
This procedure is called when CCBS call is successfully delivered in the destination MSC and the event is detected in the VLR side.
Figure 11.2.3.11: Procedure CCBS_ICH_Set_CCBS_Target
This procedure is called if when a call encounters busy condition in the destination MSC. If busy cause is NDUB and the user has elected to be target of CCBS requests, CCBS Target is set to True.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)128Release 1999
Procedure CCBS_MT_MSC_Check_Forwarding 1(1)
CCBStarget
Pa rameter is set when SIFIC_Ackis received fro mVL R
Cause = BusyorCause = No circuitchannel availa ble
CCBS Target:= True
Al te r the i nternal variablewhich con trols setting ofthe diagn ostic field
CCBS Target:= False
True
Yes
No
False
Figure 11.2.3.1: Procedure CCBS_MT_MSC_Check_Forwarding
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)129Release 1999
Procedure CCBS_Handle_PRN 1(1)
Store CCBS Callindicator alongwith the MSRN
Figure 11.2.3.2: Procedure CCBS_Handle_PRN
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)130Release 1999
Procedure CCBS_ICH_Set_CCBS_Call_Indicator 1(1)
MSRN for CCBS_Call
To CCBS_Monitoring_VLR CCBS_Call
Indicator :=CCBS_Call
Yes
No
Figure 11.2.3.3: Procedure CCBS_ICH_Set_CCBS_Call_Indicator
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)131Release 1999
Procedure CCBS_ICH_MSC_Report_Failure 1(1)
CCBS Call
Outcome :=Failure
CCBS_Call_Delivery(Outcome)
To CCBS_Monitoring_VLR
Yes
No
Figure 11.2.3.4: Procedure CCBS_ICH_MSC_Report_Failure
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)132Release 1999
Procedure CCBS_ICH_VLR_Report_Failure 1(1)
CCBS Call
Outcome :=Failure
CCBS_Call_Delivery(Outcome)
To CCBS_Monitoring_VLR
Yes
No
Figure 11.2.3.5: Procedure CCBS_ICH_VLR_Report_Failure
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)133Release 1999
Procedure CCBS_ICH_Report_Not_Reachable 1(1)
CCBS Call
Outcome :=Absent Subscriber
CCBS_Call_Delivery(Outcome)
To CCBS_Monitoring_VLRNot_ReachableTo CCBS_Monitoring_VLR
Yes
No
Figure 11.2.3.6: Procedure CCBS_ICH_Report_Not_Reachable
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)134Release 1999
Procedure CCBS_ICH_Handle_NDUB 1(1)
Busy conditio n :=NDUB
CCBS Call
Network option:Release o r forward
Outcome :=Failure
Outcome :=NDUB
To CCBS_Monitoring_VLR
CCBS_Call _Delivery(Outcome)
CCBS_Call _Delivery(Outcome)
To CCBS_Monitoring_VLR
Re sult :=Fo rward
Re sult :=Re lease
Yes
No
Forwa rd Release
Figure 11.2.3.7: Procedure CCBS_ICH_Handle_NDUB
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)135Release 1999
Procedure CCBS_ICH_Handle_UDUB 1(1)
Busy condition :=UDUB
Figure 11.2.3.8: Procedure CCBS_ICH_Handle_UDUB
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)136Release 1999
Procedure CCBS_ICH_MSC_Report_Success 1(1)
CCBS_Call
Outcome :=Success
CCBS_Call_Delivery(Outcome)
To CCBS_Monitoring_VLR
Yes
No
Figure 11.2.3.9: Procedure CCBS_ICH_MSC_Report_Success
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)137Release 1999
Procedure CCBS_ICH_VLR_Report_Success 1(1)
CCBS_Call
Outcome :=Success
CCBS_Call_Delivery(Outcome)
To CCBS_Monitoring_VLR
Yes
No
Figure 11.2.3.10: Procedure CCBS_ICH_VLR_Report_Success
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)138Release 1999
Pro cedure CCBS _ICH_ Set_ CCBS_Target 1(1)
Busy condition
CCBSAllow ed
Has des tination B electedto be a target o f reques ts
CCBS Target:= True
CCBS Target:= F al s e
NDUB
Yes
No
UDUB
Figure 11.2.3.11: Procedure CCBS_ICH_Set_CCBS_Target
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)139Release 1999
11.3 Processes and procedures common in originating and destination network entities
Figure 11.3.1: Process CCBS_Monitoring_VLR
This process is responsible for monitoring the subscriber in VLR and also controls the MSC monitoring process.
Figure 11.3.2: Process CCBS_Monitoring_MSC
This process is responsible for monitoring subscriber in MSC.
Figure 11.3.3: Process CCBS_Coordinator_HLR
This process co-ordinates HLRA and HLRB monitoring interaction. Start and Stop Reporting messages are sent only once towards MSC, CCBS_Call_Report messages are directed to correct queue and Status information is distributed to both queues when needed.
Figure 11.3.4: Procedure CCBS_Set_Diagnostic_For_Release
This procedure is called to set the diagnostic field to the Release message. The diagnostic is set according to the internal CCBS Target variable.
Figure 11.3.5: Procedure CCBS_Report_Not_Idle
This procedure is called when either MO or MT setup is received or sent to the MS. It informs the VLR monitoring process that the MS is engaged with a call.
Figure 11.3.6: Procedure CCBS_Report_MS_Activity
This procedure is called when Process_Access_Request is successfully performed. It informs the VLR monitoring process and may cause transition to the Idle state.
Figure 11.3.7: Procedure CCBS_Check_Last_Call
This procedure is called when a call is ending. If the call is the last CC connection to the MS, that is reported to the VLR monitoring process.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)140Release 1999
Process CCBS_MONITORING_VLR 1(4)
Signal s to / from left are to / from HLR unless shown otherwise
Idle
Start_Report ing
Ch eck_Parame ters
See GSM 03.18
Re sult
Event_Reporting:= True
Error :=Negativerespo nse
IMSIDe tached
Start_Reporting _Error(Erro r)
IdleRo amin g inLA al lowed
Status :=CCBS_Not_Re achab le
Start_Status_Enqui ry To CCBS_Monitoring_ MSC
Start_Report ing_Ack(Status)
Wait_For_Re spon se
MonitoringDe tached
Status_EnquiryResul t From CCBS_Mo nitori ng_MSC
CCBS_No t_Idle
Status :=CCBS_Not_Id le
Status :=CCBS_Idle
Start_Report ing_Ack(Status)
Start_Re porting_Ack(Status)
MonitoringNo t Idle
Mon itorin gIdle
Pass
Fai l
No
Yes
No
Yes
Yes
No
Figure 11.3.1: Process CCBS_Monitoring_VLR (sheet 1 of 4)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)141Release 1999
Process CCBS_MONITORING_VLR 2(4)
Signals to / from left are to / from HLR unless shown otherwise
MonitoringNot Idle
From GSM 03.18 Processes OCH_MSCor ICH_MSC
Call_End Detach RadioFailure
Status :=CCBS_Idle
Event_Reporting
Event_Report(Status)
MonitoringIdle
MonitoringDetached
MonitoringDetached
From GSM 03.18 Processes OCH_MSCor ICH_MSCFrom GSM 03.93 Process MSC_CCBS_Recall_Manager
Not_Idle Location_Update MS_Activity From GSM 03.18 Process_
Access_Request_VLR
MonitoringNot_Idle
CMServType
Status :=CCBS_Idle
Event_Reporting
Event_Report(Status)
MonitoringIdle -
True
False
SMSSS
CSC
True
False
Figure 11.3.1: Process CCBS_Monitoring_VLR (sheet 2 of 4)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)142Release 1999
Process CCBS_MONITORING_VLR 3(4)
Signals to / f rom lef t are to / from HLR unless shown otherwise
MonitoringIdle
Not_IdleFrom GSM 03.18 Processes OCH_MSCor ICH_MSCFrom GSM 03.93 Process MSC_CCBS_Recall_Manager
Status :=CCBS_Not_
Idle
Event_Reporting
Event_Report(Status)
MonitoringNot Idle
RadioFailure
Status :=CCBS_Not_Reachable
Event_Reporting
Event_Report(Status)
MonitoringDetached
NotReachable
From GSM 03.18 ProcessICH_VLR or VLR_CCBS_Recall_Manager
Detach
*(Idle)
Continue_Monitoring
-
CCBS_CallFrom GSM 03.18 Process ICH_VLR
Event_Reporting:= False
True
False
True
False
Figure 11.3.1: Process CCBS_Monitoring_VLR (sheet 3 of 4)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)143Release 1999
Process CCBS_MONITORING_VLR 4(4)
Signals to / f rom lef t are to / from HLR unless shown otherwise
Note: Only MT CCBS Callreporting is interacting withthe monitoring process. MOcall reporting is shown onVLR_CCBS_Recall_Manager
*(Idle)
Cancel_Location
From subscriberdatahandling in VLR
Stop_Status_Enquiry
To CCBS_Monitoring_MSC
Idle
Event_Report_Error
CCBS_Call_Report_Error
Stop_Reporting
*(Idle,Wait_For_Response)
CCBS_Call_Delivery(Outcome)
From GSM 03.18 ProcessesICH_MSC or ICH_VLR
Event_Reporting:= True
Outcome
Mode := BStatus := CCBS_Not_Reachable
Outcome :=Failure
CCBS_Call_Report(Mode,Outcome,Status)
MonitoringDetached
Mode := B
Derive status fromthe current process
state
CCBS_Call_Report(Mode,Outcome,Status)
-
Mode := BStatus := CCBS_
Not_Idle
CCBS_Call_Report(Mode,Outcome,Status)
MonitoringNot Idle
Absent_Subscriber
Failure
SuccessNDUB
Figure 11.3.1: Process CCBS_Monitoring_VLR (sheet 4 of 4)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)144Release 1999
Process CCBS_MONITORING_MSC 1(1)
Signals to/f rom the leftare to/from the VLR;signals to/from the rightare to/from the BSSunless marked otherwise
Idle
Start_Status_Enquiry
From CCBS_Monitoring_VLR
CCBS Not Idle
Status :=CCBS Not idle
Status :=CCBS Idle
Status_Enquiry_Result
To CCBS_Monitoring_VLR
Monitoring
From CCBS_Monitoring_VLRStop_Status_Enquiry
RadioLink Failure
RadioFailure
Idle -
Yes
No
Figure 11.3.2: Process CCBS_Monitoring_MSC
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)145Release 1999
Process CCBS_Coordinator_HLR 1(6)
Signals to / from leftare to / from the VLRunless shownotherwise
Idle
From HLRA_Monitoring
Start_Reporting
From HLRB_Monitoring
Start_Reporting
CCBS_Call_Report(Mode,Outcome,Status)
Note: CCBS_Call_Reportcan exist on A side withoutongoing monitoring in the MSC
Check_Parameters See GSM 03.18
Result
ModeError:=
Negativeresponse
To HLRA_Recall_Manager
CCBS_Call_Report(Outcome)
Start_Reporting
Start_Reporting
CCBS_Call_Report_Ack
CCBS_Call_Report_Error(Error)
MonitoringA
MonitoringB - -
*
From subscriberdatahandling inHLR
Location_Update
Continue_Monitoring
From HLRB_Reques t_Manager
To HLRA_Monitoring
Location_Update
Continue_Monitoring
To HLRB_Monitoring
Location_Update
Idle -
Pass
Fail
A
B
Figure 11.3.3: Process CCBS_Coordinator_HLR (sheet 1 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)146Release 1999
Process CCBS_Coordinator_HLR 2(6)
Sig nals to / from le ftare to / from the VLRunless shownotherwise
Mon itoringA
CCBS_Call _Report(Mode,Outcome,Status)
Note: CCBS_Call_Re portcan exist on A side w ithoutongoing monitoring in the MSC
Stop_Re porting
From HLRA_Monitoring
See GSM 03.18 Check_Pa rameters
Stop_Reporting
Resul t Idle
Mode
CCBS_Ca ll_Report(Outcome)
To HLRA_Recal l_Manager
Error :=Negativeresponse
Moni toringACCBS_Ca ll_
Report_Error(Error)
CCBS_Call _Report_Ack
Start_Reporting_Error(Erro r)
Eve nt_Report(Status)
-
See GSM 03.1 8 Check_Parameters
Resul t
Error :=Negativeresponse
Event_Re port_Error(Error)
Eve nt_Report_Ack
Status :=Not_Reachable Store Status
Event_Re port(Status)
-
Pass
Fai l
A
B
Fail
Pass
Figure 11.3.3: Process CCBS_Coordinator_HLR (sheet 2 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)147Release 1999
Process CCBS_Coordinator_HLR 3(6)
Signals to / f rom lef tare to / from the VLRunless shownotherwise
MonitoringA
Start_Reporting_Ack(Status)
Store Status
Event_Report(Status)
To HLRA_Monitoring
-
Start_Reporting
From HLRB_Monitoring
Statusavailable
Event_Report(Status)
To HLRB_Monitoring
MonitoringA + B
Restore_Data
From subsc riberdatahandling inHLR
Start_Reporting
-
MonitoringB
Start_Reporting
From HLRA_Monitoring
Statusavailable
EventReport(Status)
To HLRA_Monitoring
MonitoringA + B
Restore_Data
From subsc riberdatahandling inHLR
Start_Reporting
-
Yes
No
Yes
No
Figure 11.3.3: Process CCBS_Coordinator_HLR (sheet 3 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)148Release 1999
Process CCBS_Coordinator_HLR 4(6)
Sig nals to / from le ftare to / from the VLRunless shownotherwise
Moni toringB
Start_Report ing_Ack(Status)
Start_Report ing_Error
From HLRB_Moni toring
Stop_Reporting
Store Status Status :=No t_Reachable
To HLRB_Moni toring
Event_Report(Status)
Stop_Reporting
- Idle
MonitoringB
Event_Re port(Status)
CCBS_Call_Report(Mode,Outco me,Status)
Check_Parameters See GSM 03.18 Ch eck_
Parame tersSee GSM 03.18
Resu lt Re sult
Error :=Nega tiveresponse
Store StatusErro r :=Negativeresponse
CCBS_CallReport_Error(Error)
CCBS_Call_Report_AckEvent_
Re port_Ack
Event_Report_Error(Error)
Outco me := Fai lureStatu s :=
Not_reachableStatus :=Not_Reachable
ModeTo HLRB_Moni toring
Event_Report(Status)
To HLRA_Recal l_Manage r
CCBS_Call_Report(Outcome)
CCBS_Call_Repo rt(Outcome,Status)
To HLRB_Moni toring
Store Status
-
Pa ss
Fail Fa il
Pass
A
B
Figure 11.3.3: Process CCBS_Coordinator_HLR (sheet 4 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)149Release 1999
Process CCBS_Coordinator_HLR 5(6)
Sig nals to / from le ftare to / from the VLRunless shownotherwise
MonitoringA + B
Event_Report(Status)
Start_Reporting_Ack(Status)
Start_Reporti ng_Error
CCBS_Call_Report(Mode,Outcome,Status)
Check_Pa rameters
Status :=Not_Reachable
Check_Pa rameters
Resul t Resul t
Error :=Negativerespo nse
Error :=Negativere sponse
Event_Report_Ack CCBS_Call_
Report_ Ack
CCBS_Ca ll_Report_Error(Erro r)
Event_Report_Error(Error) Outco me:=Fai lure
Status :=Not_Reach able
Status :=Not_Re achab le
Mo de
Event_Report(Status)
To HLRB_Monitoring
Event_Report(Status)
To HLRA_Monitoring
To HLRB_Monitoring
CCBS_Call_Re port(Outcome,Status)
Moni toringA + B
Event_Report(Status)
To HL RB_Monitoring
Event_Report(Status)
To HL RA_Monitoring
Store StatusTo HLRA_Recal l_Manage r
CCBS_Call_Report(Outcome)
-
Fail
Pass Fai l
Pass
B
A
Figure 11.3.3: Process CCBS_Coordinator_HLR (sheet 5 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)150Release 1999
Process CCBS_Coordinator_HLR 6(6)
Signals to / f rom lef tare to / from the VLRunless shownotherwise
MonitoringA + B
Stop_Reporting
From HLRA_Monitoring
MonitoringB
Stop_Reporting
From HLRB_Monitoring
MonitoringA
Restore_Data
From subsc riberdatahandling inHLR
Start_Reporting
-
Figure 11.3.3: Process CCBS_Coordinator_HLR (sheet 6 of 6)
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)151Release 1999
Pro cedure CCBS _Set_Diagnostic_For_ Release 1(1)
CCBSTarget
Ca ll Co m pletio nTreatme nt Indicatorpres ent in SII2?
Call Com pletion Treatm entIndicator set to Reject CallCom pletion Service Reques t?
Diagnos tic :=CCBS Pos s ib le
D iag no stic :=C CBS Not Pos si ble
Are the c onditi on s s uc hthat th e subsc riber ca nb e a targ et o f C CBSReques ts True
Yes
No
Yes
No
False
Figure 11.3.4: Procedure CCBS_Set_Diagnostic_For_Release
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)152Release 1999
Procedure CCBS_Report_Not_Idle 1(1)
Not_Idle To CCBS_Monitoring_VLR
Figure 11.3.5: Procedure CCBS_Report_Not_Idle
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)153Release 1999
Procedure CCBS_Report_MS_Activity 1(1)
Reason:=CM SERV TYPE
MS Act ivity To CCBS_Monitoring_VLR
Figure 11.3.6: Procedure CCBS_Report_MS_Activity
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)154Release 1999
Procedure CCBS_Check_Last_Call 1(1)
Last CCconnection
Call End To CCBS_Monitoring_VLR
Yes
No
Figure 11.3.7: Procedure CCBS_Check_Last_Call
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)155Release 1999
12 Information stored in the HLRs Note that a given subscriber may be both the originator and the target of CCBS requests; a given HLR may therefore be required to store both the data for HLR A and the data for HLR B against a given subscriber.
12.1 Originating Network Data The following logical states are applicable for the CCBS service in the originating network (refer to TS 23.011 for an explanation of the notation):
Provisioning State Registration State Activation State HLR Induction State
(Not Provisioned, Not Applicable, Not Active, Not Induced)
(Provisioned, Not Applicable, Active and Operative Not Induced)
The logical state shall be on a per subscriber basis and hence the same for all basic service groups.
The HLR shall store the logical state of the CCBS service (which shall be one of the valid states listed above) on a per subscriber basis. The HLR shall store the following information for each CCBS Request that is successfully activated by subscriber A:
- AddressOfB;
- Basic Service Group;
- CCBS Call Information;
- Translated Number;
- Retention supported by destination network (if HLR A supports retention);
- CCBS Index;
- CAMEL Invoked.
The HLR shall store for the served subscriber as the originator of CCBS requests:
- The parameter “Max Queue Size”,
- This parameter takes a value in the range 1 to 5.
12.2 Destination Network Data The following logical states are applicable for the CCBS service in the destination network (refer to TS 23.011 for an explanation of the notation):
Provisioning State Registration State Activation State HLR Induction State
(Not Provisioned, Not Applicable, Not Active, Not Induced)
(Provisioned, Not Applicable, Active and Operative, Not Induced)
The logical state shall be on a per subscriber basis and hence the same for all basic service groups.
The HLR shall store the logical state of the CCBS service (which shall be one of the valid states listed above) on a per subscriber basis.
The HLR shall store the following information for each CCBS Request that is successfully activated against User B :
- Basic Service Group;
- Retention supported by originating network (if HLR B supports retention).
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)156Release 1999
The HLR shall store on a per subscriber basis:
The parameter "Number of terminating CCBS Requests"
This parameter takes a value in the range 1 to 5.
12.3 Transfer of information from HLR to VLR If the provisioning state for CCBS supplementary service is "Provisioned" then, when the subscriber registers on a VLR, the HLR shall send that VLR information about the logical state of CCBS supplementary service.
If the logical state of CCBS supplementary service is changed while a subscriber is registered on a VLR, then the HLR shall inform the VLR of the new logical state of CCBS supplementary service.
Both originating and destination network CCBS supplementary service logical states are updated independently of each other to the VLR.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)157Release 1999
13 State transition model
13.1 State transition model for the CCBS service in the originating network
Figure 13.1.1 shows the successful cases of transition between the applicable logical states of the CCBS service in the originating network. The state changes may be caused by actions of the service provider or the network.
Not ProvisionedNot Applicable
Not ActiveNot Induced
ProvisionedNot Applicable
Active and OperativeNot Induced
Provision
Withdrawal
Figure 13.1.1: State Transition Model for CCBS Service in the originating network
13.2 State transition model for the CCBS service in the destination network
Figure 13.2.1 shows the successful cases of transition between the applicable logical states of the CCBS service in the destination network. The state changes may be caused by actions of the service provider or the network.
Not ProvisionedNot Applicable
Not ActiveNot Induced
ProvisionedNot Applicable
Active and OperativeNot Induced
Provision
Withdrawal
Figure 13.2.1: State Transition Model for CCBS Service in the destination network
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)158Release 1999
13.3 State transition model for a CCBS Request Figure 13.3.1 shows the successful cases of transition between the applicable logical states of a CCBS Request. The state changes may be caused by actions of the served subscriber or the network.
Each subscriber can be considered to have a set of n requests, where n is the maximum number of CCBS requests allowed for a subscriber as an originator.
Start
Active
Recall
Suspend
CCBS Request
CCBS Cancel
CCBS Recall
CCBS Suspend
CCBS Resume
CCBS Cancel
CCBS CancelCCBS Complete
Figure 13.3.1: State Transition Model for a CCBS Request in Originating Network
On provision of the CCBS service, all requests transit to the "Start" state
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)159Release 1999
Start
Active & Operative
Recall
Suspend
CCBS Request
CCBS Cancel
CCBS Recall CCBS Suspend
CCBS Resume
CCBS Cancel
CCBS CancelCCBS Complete
Active & Quiescent
Suspend & Quiescent
CCBS Cancel
SS Int
SS Int
CCBS ResumeSS Int
SS Int
CCBS Cancel
Figure 13.3.2: State Transition Model for a CCBS Request in Destination Network
13.4 Information stored in the VLRs Originating Network Data
For the CCBS service in the originating network the VLR shall store the service state information received from HLR.
Destination Network Data
For the CCBS service in the destination network the VLR shall store the service state information received from HLR.
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)160Release 1999
Annex A (Informative): Message flow diagrams showing a successful CCBS request The following message flow diagrams show a successful CCBS request. Destination B busy when request activated, subscriber A free when destination B becomes free (mobile-to-mobile).
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)161Release 1999
OCH
_MSC
HL
RA
HL
RB
MT_
GM
SCIC
H_M
SCIC
H_VL
RM
S
VL
RM
SC
MS
C /
VL
RG
MS
CM
S
Set-u
pIn
itial
Add
ress
Mes
sage
Rel
ease
Initi
al A
ddre
ss M
essa
ge
Rel
ease
(CC
BS P
ossi
ble)
SIFI
CSI
FIC
Neg
(ND
UB)
OPE
RAT
IVE
CC
BS P
oss.
CC
BS R
eque
stC
CBS
Req
uest
Star
ts H
LRA_
Req
uest
Star
ts H
LRB_
Req
uest
CC
BS R
eque
st
CC
BS R
eque
st A
ck
Star
t_R
ecal
l_M
anag
er
IDLE
IDLE
ACTI
VE
WA
IT_F
OR
B_G
UAR
DE
D
IDLE
CCBS
_M
onito
ring_
MSC
CCBS
_M
onito
ring_
VLR
WA
IT
Star
t_M
onito
ring
B_Q
uery
Star
t_R
epor
ting
Star
t_St
atus
Enqu
iry
Stat
us E
nqui
ryR
esul
t(N
ot Id
le)
MO
NIT
OR
ING
MO
NIT
OR
ING
,N
OT
IDLE
Even
t_R
epor
t (C
CBS
Not
Idle
)
B_N
OT_
IDLE
NO
_B_Q
UER
Y
B_Q
UER
Y
B_N
OT_
IDLE
B_Q
UER
Y
CC
BS_R
eq A
ck
OPE
RA
TIVE
OPE
RAT
IVE
ACTI
VE
WAI
T_FO
RAN
SWER
IDLE
CC
BS_R
eque
st_A
ckR
elea
se(C
CBS
Ack
)
HLRB
_M
onito
ring
HLR
B_Re
call_
Man
ager
HLR
B_Re
ques
t_M
anag
erHL
RB_
Requ
est
HLR
A_Re
ques
t_M
anag
er
HLR
A_R
eque
st
ICH_
MSC
MO
NIT
OR
ING
,ID
LE
IDLE
Cal
l End
Even
t_R
epor
t (C
CBS
_Idl
e)
CC
BS_
Che
ck_
Last
_Cal
l
Star
t_Bl
ocki
ng
T8 E
xpiry
B_ID
LEB_
QU
ERY
B_G
uard
ed B_ID
LE_G
UAR
DED
NO
_B_Q
UER
YW
AIT_
FOR
_S
ELE
CTI
ON
_R
ESPO
NSE
SELE
CTE
D
ACTI
VE
Sele
ct_R
eque
st
Sele
ctio
n_R
eq
Sele
ct_R
eque
st_R
espo
nse
Send
_RU
F
Rec
all B
lock
Rem
ote
Use
r Fre
e
SELE
CTE
D
BLO
CK
ING
REC
ALL_
BLO
CKI
NG
WA
IT_F
OR
_C
CBS
_CAL
L
HLRB
_Bl
ocki
ng
ΨΨ ΨΨ
Star
t T8
CCB
S_Co
ordi
nato
r_HL
R
Mon
itorin
g B
Mon
itorin
g B
Mon
itorin
g B
Even
t_R
epor
t(C
CBS
_Idl
e)
Even
t_R
epor
tAc
k
Star
t_R
epor
ting_
Ack
Star
t_R
epor
ting
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)162Release 1999
Rec
all_
Rep
ort
(suc
cess
)
MS
Con
nect
ion
esta
blis
hed
If Q
em
pty:
If ha
ve s
uspe
nded
requ
ests
:
Else
::
IDLE
MT_
GM
SC
MSC
_CC
BS_
Rec
all_
Man
ager
VLR
_CCB
S_R
ecal
l_M
anag
erR
ecal
l
REC
ALL
CC
BS_B
USY
CC
BS_R
UF
Page
_MS_
For_
Rec
all
Page
Proc
essA
cces
sR
eque
st
CM
_Ser
vice
_Pr
ompt
Star
t CC
CC
BS_C
all_
Info
CC
BS_C
all_
Info
_Ack
Com
plet
e_R
ecal
l_Ac
k
Com
plet
eRec
all
Rec
all
Rec
all
CCBS
_Set
upR
ecal
l_Ac
kC
CBS
_RU
F_Ac
k (a
ccep
t)
CC
BS_B
USY
WAI
T_FO
R_
CAL
L_D
ELIV
ERY
OG
_Cal
l_Se
tup_
MSC
:
OCH
_CCB
S_VL
RSI
FOC
Com
plet
eC
all
Cal
l Pr
ocee
ding
Initi
al A
ddre
ss M
essa
ge
Addr
ess
Com
plet
e , A
nsw
er /
Con
nect
Con
nect
Ack
CC
BS C
all
Del
iver
y(s
ucce
ss)
WAI
T_FO
R_
CLE
AR
VLR_
CCBS
_Re
call_
Man
ager
IDLE
ICH
_MSC
ICH
_VLR
SIFI
C
IDLE
Initi
al A
ddre
ss
Succ
essf
ulCa
ll
WAI
T_FO
R_
CLE
AR
IDLE
Rel
ease
Addr
ess
Com
plet
e , A
nsw
er /
Con
nect
WAI
T_FO
R_
CLE
AR
HLR
B_
Mon
itorin
gH
LRB
_R
ecal
l_M
anag
er
HLR
B_
Req
uest
_M
anag
er
HLR
B_
Requ
est
CC
BS_C
all
Del
iver
y (s
ucce
ss)
Cal
l Del
iver
y(s
ucce
ss)
If Q
is
empt
y :
Stop
_Rec
all_
Man
ager
CC
BS_E
ND
Del
eted
IDLE
IDLE
IDLE
ACTI
VESE
LEC
TED
REC
ALL_
BLO
CKI
NG
WAI
T_FO
R_
CC
BS_C
ALL
IDLE
HLR
B_
Blo
ckin
g
Stop
Blo
ckin
g
Stop
Blo
ckin
gSt
opM
onito
ring
Stop
_Rep
ortin
g
CCBS
_M
onito
ring_
MSC
CCBS
_M
onito
ring_
VLR
MO
NIT
OR
ING
MO
NIT
OR
ING
,ID
LE Stop
Sta
tus
Enqu
iry
IDLE
IDLE
IDLE
Stop
Blo
ckin
g
ICH
_MSC
IDLE
Rel
ease
IDLE
OPE
RAT
IVE
IDLE
CC
BS_C
all_
Rep
ort (
Mod
eA, s
ucce
ss)
Del
eted
Com
plet
ed
IDLE
OPE
RAT
IVE
Rel
ease
Rel
ease
OPE
RAT
IVE
RES
UM
ING
WAI
T_FO
R_
CAL
L_D
ELIV
ERY
B_ID
LE_G
UAR
DED
NO
_B_Q
UER
Y
B_ID
LE_G
UAR
DED
NO
_B_Q
UER
Y
B_Q
uery
WAI
T_FO
RB_
GU
ARD
EDSt
art B
lock
ing
B_G
uard
edSe
lect
_Req
uest
(Go
to ΨΨ ΨΨ
)B_
IDLE
_GU
ARD
EDN
O_B
_QU
ERY
WAI
T_FO
R_
SELE
CTI
ON
_R
ESPO
NSE
IDLE
BLO
CKI
NG
HLR
A_
Rec
all_
Man
ager
HLR
A_
Req
uest
_M
anag
er
HLR
A_
Req
uest
CC
BS_C
all_
Rep
ort
CC
BS_C
all_
Rep
ort A
ck
CC
BS_
Coo
rdin
ator
_H
LR
Mon
itorin
g B
CC
BS_
Coo
rdin
ator
_H
LR
IDLE
CC
BS_C
all_
Rep
ort (
succ
ess)
CC
BS_C
all
Rep
ort
(suc
cess
)
IDLE
Stop
_R
epor
ting
Mon
itorin
g B
3GPP
3GPP TS 23.093 V3.2.0 (2000-09)163Release 1999
Annex A (informative): Change history
Change history TSG CN# Spec Version CR <Phase> New Version Subject/Comment Apr 1999 GSM 03.93 6.2.0 Transferred to 3GPP CN1 CN#03 23.093 3.0.0 Approved at CN#03 CN#06 23.093 3.0.0 001r3 R99 3.1.0 Approved at CN#06 CN#06 23.093 3.0.0 002r3 R99 3.1.0 Approved at CN#06 CN#09 23.093 3.1.0 003r1 R99 3.2.0 Handling of the Call Completion Treatment
Indicator CN#09 23.093 3.1.0 004 R99 3.2.0 Handling of the Call Diversion Treatment
Indicator