A.2 AF session establishment

29.2013GPPRelease 17Representational State Transfer (REST) reference point between Application Function (AF) and Protocol Converter (PC)TS

This sub-clause describes the signalling flow for the AF session establishment procedure through the PC.

Figure A.2.1: Initial AF session request

1. The AF sends the HTTP POST to the PC to initiate the creation of a resource state, to inform the PC about the notification URL and to initiate an AF session establishment including the parameters defined in sub-clause 4.5.2.

2. The PC converts the request to a Diameter AAR command. The PC provides the Service Information to the PCRF by sending a Diameter AAR command as specified in 3GPP TS 29.214 [4] for a new Rx Diameter session.

3. The PCRF sends a Diameter AAA command to the PC as specified in 3GPP TS 29.214 [4].

4. The PC converts the required content of the Diameter AAA command and provides it in the HTTP 201 CREATED response to the AF including the parameters defined in sub-clause 4.5.2. The response message includes one resource in the Location header field, which represent the AF session ID.