6.2.17 Support of generic image attributes

23.3333GPPMultimedia Resource Function Controller (MRFC) - Multimedia Resource Function Processor (MRFP) Mp interface: Procedures descriptionsRelease 17TS

6.2.17.1 General

The MRFC and the MRFP may support the media-level SDP image attribute defined in IETF RFC 6236 [28] as required by 3GPP TS 26.114 [23].

If the MRFP and the MRFC support the negotiation of the image size and if the MRFC receives the SDP image attribute(s) "a=imageattr" then the MRFC may send the generic image attribute parameter to the MRFP when seizing or modifying a termination.

The list of image sizes per payload type supported by the MRFP shall be preconfigured in the MRFC. If the image sizes received within an SDP body on the Mr interface are not all supported by the MRFP then the MRFC shall only send the list of corresponding MRFP supported image sizes to the MRFP. If no image size is supported by the MRFP, the MRFC shall not send the generic image attribute parameter to the MRFP.

6.2.17.2 Indication of generic image attributes

The MRFC may include the generic image attributes to the MRFP. The example sequence is shown in figure 6.2.17.2.1.

Figure 6.2.17.2.1: Request to reserve IMS resources with generic image attribute