RANAP Procedure

7/28/2019 RANAP Procedure

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RELOCATION REQUEST

This message is sent by the CN to request the target RNC to allocate necessary resources for a relocation.

Direction: CN RNC.

Signalling bearer mode: Connection oriented.

RELOCATION REQUEST ACKNOWLEDGE

This message is sent by the target RNC to inform the CN about the result of the resource allocation for the requested

relocation.

Direction: RNC CN.


RELOCATION COMMAND

This message is sent by the CN to the source RNC to inform that resources for the relocation are allocated in the

target RNC (in case of intra-system relocation) or in the target system (in case of inter-system relocation).

Direction: CN RNC.


RELOCATION DETECT

This message is sent by the target RNC to inform the CN that the relocation execution trigger has been received.

Direction: RNC CN.


RELOCATION COMPLETEThis message is sent by the target RNC to inform the CN that the relocation is completed.

Direction: RNC CN.


RELOCATION PREPARATION FAILURE

This message is sent by the CN to the source RNC if the relocation preparation failed.

Direction: CN RNC.


RELOCATION FAILURE

This message is sent by the target RNC to inform the CN that the requested resource allocation failed.

Direction: RNC CN.



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Table 1: Class 1

Elementary Procedure Initiating Message Successful Outcome Unsuccessful Outcome

Response message Response message

Iu Release IU RELEASE COMMAND IU RELEASE COMPLETE

Relocation Preparation RELOCATION REQUIRED RELOCATION COMMAND RELOCATIONPREPARATION FAILURE

Relocation ResourceAllocation

RELOCATION REQUEST RELOCATION REQUESTACKNOWLEDGE

RELOCATION FAILURE

Relocation Cancel RELOCATION CANCEL RELOCATION CANCELACKNOWLEDGE

SRNS Context Transfer SRNS CONTEXTREQUEST

SRNS CONTEXTRESPONSE

Security Mode Control SECURITY MODECOMMAND

SECURITY MODECOMPLETE

SECURITY MODEREJECT

Data Volume Report DATA VOLUME REPORTREQUEST

DATA VOLUME REPORT

Reset RESET RESET ACKNOWLEDGE

Reset Resource RESET RESOURCE RESET RESOURCEACKNOWLEDGE

Location related Data LOCATION RELATEDDATA REQUEST LOCATION RELATED DATARESPONSE LOCATION RELATEDDATA FAILURE

Information Transfer INFORMATIONTRANSFER INDICATION

INFORMATION TRANSFERCONFIRMATION

INFORMATIONTRANSFER FAILURE

Uplink InformationExchange

UPLINK INFORMATIONEXCHANGE REQUEST

UPLINK INFORMATIONEXCHANGE RESPONSE

UPLINK INFORMATIONEXCHANGE FAILURE

MBMS Session Start MBMS SESSION START MBMS SESSION STARTRESPONSE

MBMS SESSION STARTFAILURE

MBMS Session Update MBMS SESSION UPDATE MBMS SESSION UPDATERESPONSE

MBMS SESSION UPDATEFAILURE

MBMS Session Stop MBMS SESSION STOPREQUEST

MBMS SESSION STOPRESPONSE

MBMS UE Linking MBMS UE LINKINGREQUEST

MBMS UE LINKINGRESPONSE

MBMS Registration MBMS REGISTRATIONREQUEST

MBMS REGISTRATIONRESPONSE

MBMS REGISTRATIONFAILURE

MBMS CN De-Registration MBMS CN DE-REGISTRATIONREQUEST

MBMS CN DE-REGISTRATIONRESPONSE

MBMS RAB Release MBMS RAB RELEASEREQUEST

MBMS RAB RELEASE MBMS RAB RELEASEFAILURE

Enhanced RelocationComplete

ENHANCEDRELOCATIONCOMPLETE REQUEST

ENHANCED RELOCATIONCOMPLETE RESPONSE

ENHANCEDRELOCATIONCOMPLETE FAILURE

SRVCC Preparation SRVCC CS KEYSREQUEST

SRVCC CS KEYSRESPONSE

NRNTORGSUCC :Number of successful outgoing CDMA to GSM handovers from the RNC

The counter is increased after a successful CDMA to GSM handover originating from this RNC.

NRNTRRRGTOT: Number of relocation required messages received for WCDMA to GSM handover. This counter

is increased each time a relocation required message is received indicating a GSM cell as target.

NRELRELERR Number of relocation faults causing the MSC to release the callThe counter is increased when order to release the call is sent to the

switching function in the MGW because of unsuccessful switch orders orexpiry of the timer for relocation completion.


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RANAP Procedure

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