Session description protocol mechanisms for signaling radio access network capabilities in multimedia telephony sessions

A user equipment (UE) comprising:

• memory circuitry to store program code of a Multimedia Telephony Service for Internet Protocol Multimedia Subsystem (MTSI) client;
• and
• processor circuitry coupled with the memory circuitry, the processor circuitry to operate the MTSI client to:
• generate a Session Description Protocol (SDP) message to indicate support for one or more radio capabilities, the one or more radio capabilities including an access network bitrate recommendation (ANBR) capability, and
• send the SDP message to another MTSI client operated by another UE.

A user equipment (UE) comprising:

• memory circuitry to store program code of a Multimedia Telephony Service for Internet Protocol Multimedia Subsystem (MTSI) client in terminal;
• and
• processor circuitry coupled with the memory circuitry, the processor circuitry to operate the MTSI client in terminal to:
• identify an access network bitrate recommendation (ANBR) capability of a remote device from a session description protocol (SDP) offer message obtained from the remote device,
• generate an SDP answer message to indicate support of the ANBR capability by the UE, and
• send the SDP answer message to the remote device.