B.0 General

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

The following is applicable for Emergency Services and PSAP call back request:

– The P-CSCF includes an Emergency indication when service information is sent over Rx and when required by the IMS deployment, the P-CSCF may also indicate that it requires EPC-level user information as defined in 3GPP TS 29.214 [10].

– The PCRF only allows Emergency Sessions that are bound to an IP-CAN session established to an Emergency APN.

– Upon request from the P-CSCF, the PCRF provides the P-CSCF with EPC-level user information corresponding to the established IP-CAN session.

The following is not applicable for Emergency Services and PSAP call back request:

– Pre-authorization for a UE terminated IMS session establishment with UE initiated resource reservation.

– Subscription to notification of Signalling Path Status at IMS Registration, subscription to notification of changes of IP-CAN type at IMS Registration and Provisioning of SIP Signalling flow information at IMS Registration procedures.