03 Owa210001 Wcdma Utran Signaling Procedure( for Rno) Issue1

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Transcript of 03 Owa210001 Wcdma Utran Signaling Procedure( for Rno) Issue1

  • HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

    www.huawei.com

    Internal

    OWA210001WCDMA UTRAN

    Signaling Procedure

    ISSUE 1.0

  • HUAWEI TECHNOLOGIES CO., LTD. Page 1All rights reserved

    Upon completion of this course, youwill be able to:

    Understand UTRAN Interface andstructure

    Understand the definitions aboutUTRAN network elements

    Understand UTRAN signalingprocedure

  • HUAWEI TECHNOLOGIES CO., LTD. Page 2All rights reserved

    Chapter 1 UTRAN Network OverviewChapter 1 UTRAN Network Overview

    Chapter 2 Basic Concepts about UTRANChapter 2 Basic Concepts about UTRAN

    Chapter 3 UTRAN Signaling ProcedureChapter 3 UTRAN Signaling Procedure

  • HUAWEI TECHNOLOGIES CO., LTD. Page 3All rights reserved

    The Position of UTRAN in WCDMA Network

  • HUAWEI TECHNOLOGIES CO., LTD. Page 4All rights reserved

    UMTS Construction

    Iu

    UTRAN

    UE

    Uu

    CN

    UTRANUTRAN UMTS Terrestrial Radio Access NetworkUMTS Terrestrial Radio Access NetworkCNCN Core NetworkCore NetworkUEUE User EquipmentUser Equipment

  • HUAWEI TECHNOLOGIES CO., LTD. Page 5All rights reserved

    UMTS Structure

    RNS

    RNC

    RNS

    RNC

    Core Network

    Node B Node B Node B Node B

    Iu Iu

    Iur

    Iub IubIub Iub

  • HUAWEI TECHNOLOGIES CO., LTD. Page 6All rights reserved

    Uu Interface

    L3

    c

    o

    n

    t

    r

    o

    l

    c

    o

    n

    t

    r

    o

    l

    c

    o

    n

    t

    r

    o

    l

    LogicalChannels

    TransportChannels

    C-plane signalling U-plane information

    PHY

    L2/MAC

    L1

    RLC

    DCNtGC

    L2/RLC

    MAC

    RLCRLC

    RLCRLC

    RLCRLCRLC

    Duplication avoidance

    UuS boundary

    BMC L2/BMC

    control

    PDCPPDCP L2/PDCP

    DCNtGC

    RadioBearers

    RRC

    c

    o

    n

    t

    r

    o

    l

  • HUAWEI TECHNOLOGIES CO., LTD. Page 7All rights reserved

    Iu-CS Interface

    Q.2150.1

    Q.2630.1

    RANAPIu UP Protocol

    Layer

    TransportNetwork

    Layer

    Transport NetworkUser Plane

    Control Plane User Plane

    Transport NetworkUser Plane

    Transport NetworkControl Plane

    RadioNetwork

    Layer

    SSCOP

    AAL5

    SSCOP

    SSCF-NNI

    AAL2AAL5

    MTP3bMTP3b

    SCCP

    SSCF-NNI

    Physical Layer

    ATM

  • HUAWEI TECHNOLOGIES CO., LTD. Page 8All rights reserved

    Iu-PS Interface

    SSCF-NNI

    SSCOP

    AAL5

    IP

    SCTP

    SCCP

    SSCF-NNI

    MTP3-BM3UA

    Physical Layer

    Control Plane User Plane

    ATM

    AAL5

    IP

    UDP

    GTP-U

    Physical Layer

    ATM

    TransportNetwork

    Layer

    Transport NetworkControl Plane

    RadioNetwork

    LayerRANAP Iu UP ProtocolLayer

    Transport NetworkUser Plane

    Transport NetworkUser Plane

  • HUAWEI TECHNOLOGIES CO., LTD. Page 9All rights reserved

    Iub Interface

    Node BApplication Part

    (NBAP)

    AAL Type 2

    ALCAP

    TransportLayer

    RadioNetwork

    Layer

    Radio NetworkControl Plane

    TransportNetwork

    Control Plane

    DC

    H FP

    RA

    CH

    FP

    ATM

    DSC

    H FP

    AAL Type 5

    User Plane

    SSCF-UNI

    SSCOP

    AAL Type 5

    SSCF-UNI

    SSCOP

    Q.2630.1

    Q.2150.2

    FAC

    H FP

    PCH

    FP

    USC

    H FP

    CPC

    H FP

    Physical Layer

  • HUAWEI TECHNOLOGIES CO., LTD. Page 10All rights reserved

    Iur Interface

    SSCF-NNI

    SSCOP

    MTP3-B

    AAL5

    IP

    SCTP

    SCCP

    AAL5

    STC (Q.2150.1)

    RNSAPIur Data

    Stream(s)

    Physical Layer

    Control Plane User Plane

    ATM

    ALCAP(Q.2630.1)

    AAL2

    SSCF-NNI

    SSCOP

    MTP3-B

    IP

    SCTP

    M3UAM3UA

    TransportNetwork

    Layer

    Transport NetworkControl Plane

    RadioNetwork

    Layer

    Transport NetworkUser Plane

    Transport NetworkUser Plane

  • HUAWEI TECHNOLOGIES CO., LTD. Page 11All rights reserved

    Question

    What kind of Interfaces are there in UTRAN ?

  • HUAWEI TECHNOLOGIES CO., LTD. Page 12All rights reserved

    Chapter 1 UTRAN Network OverviewChapter 1 UTRAN Network Overview

    Chapter 2 Basic Concepts about UTRANChapter 2 Basic Concepts about UTRAN

    Chapter 3 UTRAN Signaling ProcedureChapter 3 UTRAN Signaling Procedure

  • HUAWEI TECHNOLOGIES CO., LTD. Page 13All rights reserved

    RAB, RB and RL

    RAB

    RB

    RLNodeB

    RNC CNUE

    UTRAN

  • HUAWEI TECHNOLOGIES CO., LTD. Page 14All rights reserved

    RAB, RB and RL

    RAB The service that the access stratum provides to thenon-access stratum for transfer of user data between UserEquipment and CN

    RB The service provided by the layer2 for transfer of userdata between User Equipment and Serving RNC

    RL A "radio link" is a logical association between single UserEquipment and a single UTRAN access point. Its physicalrealization comprises one or more radio bearer transmissions

  • HUAWEI TECHNOLOGIES CO., LTD. Page 15All rights reserved

    UE Working Modes and states

    Idle mode

    Connected mode

    Cell_DCH

    Cell_FACH

    Cell_PCH

    URA_PCH

  • HUAWEI TECHNOLOGIES CO., LTD. Page 16All rights reserved

    UE Working Modes and states Idle Mode

    The UE has no relation to UTRAN, only to CN. For data transfer, asignalling connection has to be established.

    UE camps on a cell< It enables the UE to receive system information from the PLMN< When registered and if the UE wishes to establish an RRC

    connection, it can do this by initially accessing the network on thecontrol channel of the cell on which it is camped

    < UE can receive "paging" message from control channels of the cell.< It enables the UE to receive cell broadcast services.

    The idle mode tasks can be subdivided into three processes:< PLMN selection and reselection;< Cell selection and reselection;< Location registration.

  • HUAWEI TECHNOLOGIES CO., LTD. Page 17All rights reserved

    UE Working Modes and states Connected Mode (Cell-DCH, Cell-FACH, Cell-PCH, URA-PCH)

    When at least one signalling connection exists, the UE is inconnected mode and there is normally an RRC connection betweenUE and UTRAN. The UE position can be known on different levels:

    < UTRAN Registration Area (URA) levelThe UE position is known on URA level. The URA is a set ofcells

    < Cell levelThe UE position is known on cell level. Different transportchannel types can be used for data transfer:

    < Common transport channels (RACH / FACH, DSCH, CPCH)

    < Dedicated transport Channels (DCH)

  • HUAWEI TECHNOLOGIES CO., LTD. Page 18All rights reserved

    UE Working Modes and states

    Cell-DCH

    < In active state

    < Communicating via its dedicatedchannels

    < UTRAN knows which cell UE is in.

  • HUAWEI TECHNOLOGIES CO., LTD. Page 19All rights reserved

    Cell-FACH and Cell-PCH State Cell-FACH

    < In active state< Few data to be transmitted both in uplink and in downlink.

    There is no need to allocate dedicated channel for this UE.< Downlink uses FACH and uplink uses RACH.< UE need to monitor the FACH for its relative information.< UTRAN knows which cell UE is in.

    Cell-PCH< No data to be transmitted or received.< Monitor PICH, to receive its paging.< lower the power consumption of UE.< UTRAN knows which cell UE is in.< UTRAN have to update cell information of UE when UE

    roams to another cell

  • HUAWEI TECHNOLOGIES CO., LTD. Page 20All rights reserved

    URA-PCH State

    URA-PCH

    < No data to be transmitted or received.

    < Monitor PICH.

    < UTRAN only knows which URA (UTRANRegistration Area, which consists of multiplecells) that UE is in.

    < UTRAN update UE information only after UE hasroamed to other URA.

    < A better way to lower the resource occupancyand signaling transmission

  • HUAWEI TECHNOLOGIES CO., LTD. Page 21All rights reserved

    UE states

    CELL_DCH CELL_FACH

    CELL_PCHURA_PCH

    IDLE

    DEAD - Scanning networks (PLMN)- Camp on cell

    - Monitor paging channel- cell re-selection

    - Dedicated Channel- Radio bearers Transmission Services - upper layer Signaling

    trigger (CN)

    - Reduce actionDTXand save power

    RRC connection

  • HUAWEI TECHNOLOGIES CO., LTD. Page 22All rights reserved

    SRNC/DRNC

    SRNC and DRNC are on a per connection basis between a UE andthe UTRAN

    The SRNC handles the connection to one UE, and may borrowradio resources of a certain cell from the DRNC

    Drift RNSs support the Serving RNS by providing radio resources

    A UE in connection state has at least one and only one SRNC, butcan has 0 or multiple DRNCs

    CN

    SRNC DRNC

    IuIur

  • HUAWEI TECHNOLOGIES CO., LTD. Page 23All rights reserved

    CRNC

    The CRNC owns the radio resources of a cell

    Dynamical control of power for dedicated channels, within limitsadmitted by CRNC, is done by the SRNC.

    Scheduling of data for dedicated channels is done by the SRNC,while for common channels it is done by the CRNC

    Iub

    Node B

    Cell Cell Cell

    Node B

    ...

    Iu

    CRNC

    CN

  • HUAWEI TECHNOLOGIES CO., LTD. Page 24All rights reserved

    Questions

    Whats the meaning of RAB, RB RL?

    How many state on UE can have in WCDMA? Could youuse an example to explain the states?

    Could you explain what is the SRNC, DRNC, CRNC?

  • HUAWEI TECHNOLOGIES CO., LTD. Page 25All rights reserved

    Chapter 1 UTRAN Network OverviewChapter 1 UTRAN Network Overview

    Chapter 2 Basic Concepts about UTRANChapter 2 Basic Concepts about UTRAN

    Chapter 3 UTRAN Signaling ProcedureChapter 3 UTRAN Signaling Procedure

  • HUAWEI TECHNOLOGIES CO., LTD. Page 26All rights reserved

    Chapter 3 UTRAN Signaling ProcedureChapter 3 UTRAN Signaling Procedure

    3.1 Cell Setup3.1 Cell Setup

    3.2 System Information Broadcast3.2 System Information Broadcast

    3.3 Paging3.3 Paging

    3.4 Call process3.4 Call process

    3.5 Handover3.5 Handover

  • HUAWEI TECHNOLOGIES CO., LTD. Page 27All rights reserved

    Cell Setup

    NBAP

    NBAP

    NBAP

    NBAP

    NBAP

    NBAP

    NBAP

    NBAP

    NBAP

    NBAP

    NCP :Resouce Status Ind

    NCP :Audit Req

    NCP :Cell Setup Req

    NCP :Cell Setup Rsp

    NBAPNBAP NCP :Comm TrCh Setup Req

    NBAPNBAP NCP :Comm TrCh Setup Rsp

    Q.AAL2

    Q.AAL2

    Q.AAL2

    Q.AAL2

    Est Req

    Est Conf

    RNC NodeB

    NCP :Audit Rsp

    NBAPNBAP NCP :Comm TrCh Setup Req

    NBAPNBAP NCP :Comm TrCh Setup Rsp

    Q.AAL2

    Q.AAL2

    Q.AAL2

    Q.AAL2

    Est Req

    Est Conf

  • HUAWEI TECHNOLOGIES CO., LTD. Page 28All rights reserved

    Cell Setup

    Setup NCP and CCP in SAAL link stratum, which NCPcarries the NBAP public information and CCP carries theNBAP dedicated information. One NodeB only can setupone NCP, but can setup several CCP;

    to prepare the cell setting up, the resource of Node Bshould be audited.;

    Logic cell setup

    Setup the common transport channel for cell, includingRACH, FACH and PCH.

    The process of cell setupThe process of cell setup

  • HUAWEI TECHNOLOGIES CO., LTD. Page 29All rights reserved

    Chapter 3 UTRAN Signaling ProcedureChapter 3 UTRAN Signaling Procedure

    3.1 Cell Setup3.1 Cell Setup

    3.2 System Information Broadcast3.2 System Information Broadcast

    3.3 Paging3.3 Paging

    3.4 Call process3.4 Call process

    3.5 Handover3.5 Handover

  • HUAWEI TECHNOLOGIES CO., LTD. Page 30All rights reserved

    System Information Broadcast Flow

    3.BCCH:System Information

    1.System Information Update Request

    UE Node B RNC CN

    NBAPNBAP

    RRCRRC

    4.BCCH:System Information RRCRRC

    5.BCCH:System Information RRCRRC

    2.System Information Update ResponseNBAPNBAP

  • HUAWEI TECHNOLOGIES CO., LTD. Page 31All rights reserved

    Introduction of System Information

    MIBContains PLMN tag and SB (scheduling information block) or thescheduling information for SIB (system info block)

    SB1Contains scheduling information for SIB

    SB2Contains scheduling information for SIB

    SIB1Contains the system information for NAS and the timer/counter for UE

    SIB2Contains the URA information

    SIB3Contains the parameters for cell selection and cell re-selection

  • HUAWEI TECHNOLOGIES CO., LTD. Page 32All rights reserved

    Introduction of System Information

    SIB4Contains parameters for cell selection and cell re-selection while UE is inconnecting mode

    SIB5Contains parameters for the common physical channels of the cell

    SIB6Contains parameters for the common physical channels of the cell whileUE is in connecting mode

    SIB7Contains the uplink interference level and the refreshing timer for SIB7

    SIB8Contains the CPCH static information

  • HUAWEI TECHNOLOGIES CO., LTD. Page 33All rights reserved

    Introduction of System Information

    SIB9Contains the CPCH dynamic information

    SIB10Contains information to be used by UEs having their DCH controlledby a DRAC procedureUsed in FDD mode onlyTo be used in CELL_DCH state onlyChanges so often, its decoding is controlled by a timer

    SIB11Contains measurement controlling information

    SIB12Contains measurement controlling information in connecting mode

    SIB13Contains ANSI-41 system information

  • HUAWEI TECHNOLOGIES CO., LTD. Page 34All rights reserved

    Introduction of System Information

    SIB14:Contains the information in TDD mode

    SIB15:Contains the position service information

    SIB16:Contains the needed pre-configuration information for handover fromother RAT to UTRAN

    SIB17:Contains the configuration information for TDD

    SIB18:Contains the PLMN identities of the neighboring cellsTo be used in shared networks to help with the cell reselection process

  • HUAWEI TECHNOLOGIES CO., LTD. Page 35All rights reserved

    System Information Block Type 1

    System information type 1 The NAS system information CS domain DRXK 6then DRX

    period is 2^k = 2 ^ 6 = 64 TTI = 640ms

    PS domain DRXK 6then DRXperiod is 2^k = 2 ^ 6 = 64 TTI = 640ms

    The different timers for UE inconnecting mode and idle mode.

  • HUAWEI TECHNOLOGIES CO., LTD. Page 36All rights reserved

    System Information Block Type 2

    System info type 2

    URAinformation

  • HUAWEI TECHNOLOGIES CO., LTD. Page 37All rights reserved

    System Information Block Type 3

    The references for cell selectionand re-selection

    Qhyst2s

    Sintrasearch

    Sintersearch

    SinterRatsearch

    Qqualmin

    Qrxlemin

    T reselection

    Max Allowed UE TX power

  • HUAWEI TECHNOLOGIES CO., LTD. Page 38All rights reserved

    System Information Block Type 5

    The configuration informationfor the following physicalchannels and the counterparttransport channels

    PICH

    AICH

    PCCPCH

    PRACH

    SCCPCH

  • HUAWEI TECHNOLOGIES CO., LTD. Page 39All rights reserved

    System Information Block Type 7 and 11

    System info type 7

    Including the UL interference level which is used foropen loop power control:

    Preamble_Initial_Power=Primary CPICH DL TXpower - CPICH_RSCP + UL interference + ConstantValue

    Including the Expiration Time Factor which is usedfor refreshing the SIB7 periodically

    System info type 11

    The neighbor cell information for cell re-selection inIDLE mode.

  • HUAWEI TECHNOLOGIES CO., LTD. Page 40All rights reserved

    Chapter 3 UTRAN Signaling ProcedureChapter 3 UTRAN Signaling Procedure

    3.1 Cell Setup3.1 Cell Setup

    3.2 System Information Broadcast3.2 System Information Broadcast

    3.3 Paging3.3 Paging

    3.4 Call process3.4 Call process

    3.5 Handover3.5 Handover

  • HUAWEI TECHNOLOGIES CO., LTD. Page 41All rights reserved

    Paging caused by CN

  • HUAWEI TECHNOLOGIES CO., LTD. Page 42All rights reserved

    Paging caused by CN

    The paging information type which is sent by

    UTRAN is decided by UE mode.

    If UE is in the CELL_FACH or CELL_DCHUTRANsend paging type 2. In other modes, the paging

    information is type 1 and UE can use DTX method

    to detecting PICH.

  • HUAWEI TECHNOLOGIES CO., LTD. Page 43All rights reserved

    Paging caused by UTRAN

    When the system information is modified, UTRAN will send the paginginformation to tell UEs which are in IDLE, Cell_PCH or URA_PCH mode. Then,UE will read the modified system information from BCH.

    To change the state of UE which is in Cell_PCH or URA_PCH state, UTRANwill start a paging flow. Then, UE will start a Cell-Update or URA update flowfor response.

  • HUAWEI TECHNOLOGIES CO., LTD. Page 44All rights reserved

    Chapter 3 UTRAN Signaling ProcedureChapter 3 UTRAN Signaling Procedure

    3.1 Cell Setup3.1 Cell Setup

    3.2 System Information Broadcast3.2 System Information Broadcast

    3.3 Paging3.3 Paging

    3.4 Call process3.4 Call process

    3.5 Handover3.5 Handover

  • HUAWEI TECHNOLOGIES CO., LTD. Page 45All rights reserved

    Introduction of Call Process

    In WCDMA system, a call process includes thefollowing basic signaling flows:

    RRC Connection flow

    Iu interface signaling flow

    Authentication flow,

    security flow

    RAB establish flow.

    These basic flows include NAS signaling, andthe authentication and security flow are optional

  • HUAWEI TECHNOLOGIES CO., LTD. Page 46All rights reserved

    RRC Connection Establishment Flow (DCH)

    When UE is in IDLE mode and the NAS of UE request the signaling connection, UE will send a RRC Connection Request.Each UE only can have on RRC Connection. The main function is to configure the signaling channel of UTRAN.

    1. CCCH : RRC Connection Request

    5. Downlink Synchronisation

    UE Node BServing RNSServingRNC

    DCH - FP

    Allocate RNTISelect L1 and L2parameters

    RRCRRC

    NBAPNBAP3. Radio Link Setup Response

    NBAPNBAP2. Radio Link Setup Request

    RRCRRC7. CCCH : RRC Connection Set up

    Start RXdescription

    Start TXdescription

    4. ALCAP Iub Data Transport Bearer Setup

    RRCRRC9. DCCH : RRC Connection Setup Complete

    6. Uplink Synchronisation

    NBAPNBAP8. Radio Link Restore Indication

    DCH - FP

    DCH - FP

    DCH - FP

  • HUAWEI TECHNOLOGIES CO., LTD. Page 47All rights reserved

    Iu Interface Signaling Connection establish

    In Iu interface, radio network layer reports theRANAP information and NAS information.NAS information is taken as directedmessage in RANAP information.

    And the process of Iu signaling connection isto establish the Iu interface connection ofSCCP between RNC and CN.

    UE Node B RNC CN

    RRC RRC

    SCCP SCCP

    SCCP SCCP

    Initial DT

    Initial UE message (ConnectRequest)

    Connect Confirm

    RANAP

    Transport NetworkUser Plane

    Control Plane

    SSCOP

    AAL5

    MTP3b

    SCCP

    SSCF-NNI

  • HUAWEI TECHNOLOGIES CO., LTD. Page 48All rights reserved

    Authentication and Security flow

    Authentication is used for the validity of CN and UE. Security flow include the encrypt process and integrity protection.

    UE RNC CN

    RRC Connection SetupInitial DT

    Initial UE Message

    DL DT (AuthenticationRequest)DL DT (Authentication

    Request)DL DT (Authentication

    Request) DL DT (AuthenticationRequest)

    Common ID

    Security Mode CommandSecurity Mode Command

    Security Mode CommandSecurity Mode Command

    RAB Assignment

  • HUAWEI TECHNOLOGIES CO., LTD. Page 49All rights reserved

    RAB Establishment flow

    UE CNRNCNodeB

    RANAPRANAPRAB Ass Req

    Q.AAL2 Q.AAL2

    Q.AAL2Q.AAL2

    NBAPNBAP

    AAL2 Setup Req

    RL Recfg Prep

    AAL2 Setup Rep

    NBAPNBAPRL Recfg Ready

    Q.AAL2Q.AAL2AAL2 Setup Req

    Q.AAL2Q.AAL2AAL2 Setup Rep

    FPFPDL Sync

    FPFPUL Sync

    RRC RRCRB Setup

    NBAPNBAPRL Recfg Commit

    RRC RRCRB Setup Complete

    RANAPRANAPRAB Ass Rep

    RAB is the carrier which is provided by AS for NAS. RAB is the carrier in user plane, which is for transferring the voice service, data service or multiple media service

    between UE and CN. RAB establishment flow mainly includes the AAL2 PATH establishment of Iu and Iub interface, also includes the

    reconfiguration process of radio resource.

  • HUAWEI TECHNOLOGIES CO., LTD. Page 50All rights reserved

    NAS Signaling

    Authentication and security flow are optional. CN does not need to the CM Service Response if the security mode is used.

    UE MSC

    CM Service Request

    RRC Connection Setup

    Authentication Request

    Authentication Response

    Security Mode Command

    Security Mode Command

    RAB Assignment

    SetupCall Proceeding

    Alerting

    ConnectConnect ACK

    Disconnect

    ReleaseRelease Complete

    UE Outgoing Call

    UE MSC

    Paging Response

    RRC Connection Setup

    Authentication Request

    Authentication Response

    Security Mode Command

    Security Mode Command

    RAB Assignment

    SetupCall Confirmed

    Alerting

    ConnectConnect ACK

    Disconnect

    ReleaseRelease Complete

    Paging

    UE Terminating Call

  • HUAWEI TECHNOLOGIES CO., LTD. Page 51All rights reserved

    UE to UE (1)Ori UE Ter UENodeB1 NodeB2RNC1 CN RNC2

    1.RRC Connect Setup Req

    2.RL Setup Req

    3.RL Setup Rsp

    4.AAL2 Setup Req

    5.AAL2 Setup Rsp

    6.DL Sync

    7.UL Sync

    8.RRC Connect Setup

    9.RRC Connect Setup Cmp

    10.Initial DT11.Init UE(CMService Req)

    12.DT(Authentica Req)

    15.DT(Authentica Rsp)

    13.DL DT

    14.UL DT

    RANAP

    RRCRRC

    NBAPNBAP

    NBAPNBAP

    Q.AAL2Q.AAL2

    Q.AAL2Q.AAL2

    FPFP

    FPFP

    RRCRRC

    RRCRRC

    RRCRRC

    RANAP

    RANAP RANAP

    RRC RRC

    RRCRRC

    RANAP RANAP

  • HUAWEI TECHNOLOGIES CO., LTD. Page 52All rights reserved

    UE to UE (2)Ori UE Ter UENodeB1 NodeB2RNC1 CN RNC2

    22.DT(Call Setup)

    26.Paging

    28.Paging type1

    30.RRC Conn Setup Req

    33.RL Setup Rsp

    31.RL Setup Req

    36.AAL2 Setup Rsp

    34.AAL2 Setup Req

    16.Common ID17.Sec Mod Cmd

    20.Sec Mod Cmp21.UL DT

    18.Sec Mod Cmd19.Sec Mod Cmp

    24.DL DT

    23.DT(Call Procceding)

    25.RAB Ass Req

    32.RLRecfg Prep

    35.RL Recfg Ready

    27.AAL2 Setup Req

    29.AAL2 Setup Rsp

    IU AAL2 may beestablished later

    1 CNCM Service Req

    CC Alerting

    RANAPRANAP RANAP

    RRC RRC

    RRC RRC

    RANAP RANAPRRC RRC

    RANAP RANAPRANAP RANAP

    RRCRRCRANAP RANAP

    RANAP RANAP

    RRC RRCQ.AAL2 Q.AAL2

    Q.AAL2 Q.AAL2RRC RRC

    NBAP NBAP

    NBAP NBAP

    NBAP NBAP

    NBAP NBAP

    Q.AAL2 Q.AAL2

    Q.AAL2 Q.AAL2

    RANAP

  • HUAWEI TECHNOLOGIES CO., LTD. Page 53All rights reserved

    UE to UE (4)Ori UE Ter UENodeB1 NodeB2RNC1 CN RNC2

    38.DL Sync

    40.UL Sync

    42.RRC Conn Setup Cmp

    41.RRC Conn Setup

    45.Initial DT46.Init UE(Paging

    Rsp)

    56.Sec mod cmd57.Sec mod cmd58.Sec mod cmp

    54.ULDT(Authent Rsp)

    47.DT(Authent Req) 49.DL DT

    50.UL DT

    55.Common ID

    60.DT(Setup)59.Sec mod cmp

    61.DL DT63.Call Confirm

    62.UL DT

    37.AAL2Setup Req39.AAL2Setup Rsp

    43.DL Sync

    44.UL Sync

    51.RLRecfgCommit

    48.RB Setup

    52.RB Setup Complete 53.RAB

    Ass Rsp

    RRC RRC

    RRC RRC

    RANAP RANAP

    RANAP

    FPFP

    FPFP

    Q.AAL2Q.AAL2

    NBAPNBAP

    RANAP

    RANAP

    RRCRANAP

    RRC RRCRRC

    Q.AAL2Q.AAL2

    RRC

    RANAP

    RANAP RANAP

    RANAPRRCRRC

    RRC

    RRC RRC

    RRC

    RRC

    RANAP

    RRC RRCRANAP

    RANAP RANAP

    RANAPRANAPRANAP

    RRCRRCRRC RRC

    FP

    FP

    FP

    FP

    RANAP

  • HUAWEI TECHNOLOGIES CO., LTD. Page 54All rights reserved

    UE to UE (5)

  • HUAWEI TECHNOLOGIES CO., LTD. Page 55All rights reserved

    UE to UE (6)Ori UE Ter UENodeB1 NodeB2RNC1 CN RNC2

    NBAPNBAP 76.RL RcfgCommitRRC RRC77.RB Setup Complete

    RANAP RANAP78.RAB Ass RspRRC RRC79.UL DT

    RANAP RANAP80.DT(Alerting)

    RANAP RANAP81.DT(Alerting)

    RRC RRC82.DL DT

    RRC RRC83.UL DT

    RANAP RANAP84.DT(Connect)

    RANAP RANAP85.DL DT(Connect)RRC RRC86.DL DT

    RRC RRC87.UL DTRANAP RANAP

    RANAP RANAP

    RRC RRC

    88.UL DT89.DT(Connec

    t Ack)90.DL DT

    AlertingConnect

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    UE to UE (7)Ori UE Ter UENodeB1 NodeB2RNC1 CN RNC2

    RANAP RANAP92.DT(Disconnect)

    RRC RRC91.UL DT

    RANAP RANAP96.DT

    (Disconnect)

    RRC RRC97.DL DT

    RRC RRC98.UL DT

    RANAP RANAP99.DT(Release)

    RANAP RANAP93.DT(Release)

    RRC RRC94.DL DT

    RRC RRC95.UL DT

    RANAP RANAP102.DT(Release Ack)

    RANAP RANAP100.DT(Rel Comp)

    RRC RRC101.DL DT

    RANAP RANAP103.IU Rel Cmd

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    UE to UE (8)Ori UE Ter UENodeB1 NodeB2RNC1 CN RNC2

    Q.AAL2 Q.AAL2104.AAL2 Rel ReqQ.AAL2 Q.AAL2105.AAL2 Rel Conf

    RANAP RANAP

    Q.AAL2 Q.AAL2

    IU Rel Cmd

    Q.AAL2 Q.AAL2

    113.AAL2 Rel Req

    114.AAL2 Rel Conf

    RRC RRC107.RRC Conn Rel Req

    RRC RRC108.RRC Conn Rel CmpNBAP NBAP109.RL Rel Req

    NBAP NBAP110.RL Rel Rsp

    Q.AAL2 Q.AAL2

    Q.AAL2 Q.AAL2

    111.AAL2 Rel Req

    112.AAL2 Rel Conf

    RRC RRC

    117.RRC Conn Rel CmpRRC RRC116.RRC Conn Rel Req

    NBAP NBAP

    119.RL Rel RspNBAP NBAP

    118.RL Rel Req

    Q.AAL2 Q.AAL2

    Q.AAL2 Q.AAL2121.AAL2 Rel Rsp

    120.AAL2 Rel Req

    RANAP RANAP115.IU Rel Cmp

    RANAP RANAP106.IU Rel Cmp

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    Chapter 3 UTRAN Signaling ProcedureChapter 3 UTRAN Signaling Procedure

    3.1 Cell Setup3.1 Cell Setup

    3.2 System Information Broadcast3.2 System Information Broadcast

    3.3 Paging3.3 Paging

    3.4 Call process3.4 Call process

    3.5 Handover3.5 Handover

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    Concepts about Soft Handover

    Soft handover: the signals fromdifferent NodeBs are merged in RNC.

    Softer handover: the signals from

    different cells, but from the same NodeB

    are merged in NodeB.

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    Node B

    RNC

    AirBridgeAirBridge

    AirBridgeAirBridge

    AirBridgeAirBridge

    Soft Handover flow

    Core NetworkCore Network

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    Node B

    RNC

    AirBridgeAirBridge

    AirBridgeAirBridge

    AirBridgeAirBridge

    Merged in NodeB

    Soft Handover flowCore NetworkCore Network

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    Merged in RNC

    Node B

    RNC

    AirBridgeAirBridge

    AirBridgeAirBridge

    AirBridgeAirBridge

    Soft Handover flow

    Core NetworkCore Network

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    Soft Handover flow (SRNC-DRNC)

    Merged in SRNC

    Node B

    AirBridgeAirBridge

    AirBridgeAirBridge

    AirBridgeAirBridge

    Serving RNC

    Drift RNC

    Core NetworkCore Network

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    Soft Handover flow (SRN Relocation)

    Node B

    AirBridgeAirBridge

    AirBridgeAirBridge

    AirBridgeAirBridge

    Serving RNC

    RNC

    Core NetworkCore Network

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    Before Handover After Handover

    SRNC

    NodeBNodeB

    SRNC

    NodeBNodeB

    SRNC

    NodeBNodeB

    During Handover

    Soft Handover flow Intra-RNC

    CNCN CN

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    Decision to setupnew RL

    7. DCCH : Active Set Update Complete

    6.DCCH: Active Set Update

    UE Node B(new) SRNC

    NBAP1. Radio Link Setup RequestNBAP

    NBAP2. Radio Link Setup ResponseNBAP

    3 ALCAP Iub Data Transport Bearer Setup

    Start RX description

    DCH-FP4. Downlink SynchronisationDCH-FP

    DCH-FP5.Uplink SynchronisationDCH-FP

    Start RX description

    RRC

    RRC

    RRC

    RRC

    Soft Handover flow add branch in RNC

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    Decision to deletea RL

    2. DCCH : Active Set Update Complete

    1.DCCH: Active Set Update

    UE Node B(old) SRNC

    NBAP3. Radio Link Deletion RequestNBAP

    NBAP4. Radio Link Deletion ResponseNBAP

    RRC

    RRC

    RRC

    RRC

    Stop RX and Tx

    5 ALCAP Iub Transport Bearer release

    Soft Handover flow Del Branch in RNC

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    Before HandoverBefore Handover After HandoverAfter Handover

    Radio Link can not exist simultaneouslyRadio Link can not exist simultaneously

    SRNC

    NodeBNodeB

    SRNC

    NodeBNodeB

    Hard Handover (Intra-RNC)

    CNCN

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    UE Node B Source Node B Target SRNC

    8. DCCH : Physical Channel Reconfiguration Complete

    6.DCCH : Physical Channel Reconfiguration

    1. Radio Link Setup Request

    2. Radio Link Setup Response

    9. Radio Link Deletion Request

    10. Radio Link Deletion Response

    3 ALCAP ub Data Transport Bearer Setup

    7. Radio Link Failure IndicationRRCRRC

    NBAPNBAP

    NBAP

    RRCRRC

    NBAP

    NBAP

    NBAP NBAP

    Decide tohandover

    Start Rx

    Start Tx

    DCH-FP4. Downlink SynchronisationDCH-FP

    DCH-FP5.Uplink SynchronisationDCH-FP

    NBAP

    NBAP

    NBAP

    11. ALCAP Iub Data Transport Bearer Release

    Hard Handover (Intra-RNC)

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    Before HandoverBefore Handover After HandoverAfter Handover

    Radio Link can not exist simultaneouslyRadio Link can not exist simultaneously

    SRNC RNC

    NodeBNodeB

    CN

    SRNC RNC

    NodeBNodeB

    Hard Handover (Inter-RNC)

    CN

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    RNSAPRNSAP1. Radio Link Setup Request

    UE Node BSource

    Node BTarget

    RNCSource

    RNCTarget

    SRNC

    RRC RRC10. DCCH : Physical Channel Reconfiguration Complete

    RRC7.DCCH : Physical Channel ReconfigurationRRC

    6. ALCAP Iur Data Transport Bearer Setup

    NBAP NBAP2. Radio Link Setup Request

    NBAP NBAP3. Radio Link Setup Response

    NBAP NBAP12. Radio Link Deletion Request

    NBAP NBAP13. Radio Link Deletion Response

    4. ALCAP ub Data Transport Bearer Setup

    14. ALCAP Iub Data Transport Bearer Release

    RNSAP RNSAP15. Radio Link Deletion Response

    16. ALCAP Iur Data Transport Bearer Release

    RNSAP5. RL Setup Response

    RNSAP

    RNSAP11. Radio Link Deletion RequestRNSAP

    NBAP NBAP8. Radio Link Failure Indication

    RNSAP RNSAP9. Radio Link Failure Indication

    Hard Handover (Intra-RNC through Iur)

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    SRNC Relocation

    SRNS

    Core Network

    Iu

    DRNSIur

    UE

    RNS

    Core Network

    Iu

    SRNS

    UE

    After SRNS RelocationBefore SRNS Relocation

    Cells

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    Hard Handover with Relocation (CS)

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    Hard Handover with Relocation (PS)

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    Forward Handover Forward Handover is sponsored by UE, including cell update and

    URA update. URA update is only used UE which is in URA_PCHstate is doing URA re-selection, and check the RRC connection.

    When UE is in Cell_FACH and Cell_PCH state

    Cell reselection

    In service area, the T304 timer is overdue.

    When UE is in Cell_PCH or URA_PCH state:

    UE is going to upload data (from Cell_PCH or URA_PCH toCell_FACH)

    After UE received the paging information from PCCH, UEsponsored cell update.

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    Inter-system Handover Flow UMTS->GSM

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    Summary

    This chapter mainly explained thebasic signaling flow in UTRAN. Thisis very helpful for the CN signalingflow.

    SummarySummary

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