B.1b Provisioning of SIP signalling flow information at IMS Registration

29.2133GPPPolicy and charging control signalling flows and Quality of Service (QoS) parameter mappingRelease 17TS

This clause covers the optional Provisioning of SIP signalling flow information upon an initial successful IMS Registration procedure.

Figure B.1.3: Provisioning of SIP Signalling Flow Information at initial IMS Registration

1-4. The user initiates an initial SIP Registration procedure. The SIP Registration procedure is completed successfully (user has been authenticated and registered within the IMS Core NW).

5. The P-CSCF requests the establishment of a new Diameter Rx session with the intention to provision the information about the SIP signalling flows established between the UE and the P-CSCF. The P-CSCF sends a Diameter AAR command to the PCRF.

6. The PCRF performs session binding and identifies corresponding PCC Rules related to IMS Signalling.

7. The PCRF replies to the P-CSCF with a Diameter AAA.

8. If the PCRF had not previously provisioned PCC/QoS rules corresponding to the received SIP signalling flows, then the PCRF executes interactions according to figure 4.3.1.1.1. This step implies provisioning of PCC/QoS rules.