Apple Inc.
APPARATUS AND METHOD FOR SESSION INITIATED PROTOCOL (SIP) REGISTRATION PROCEDURE FOR ACCESS NETWORK BITRATE RECOMMENDATION (ANBR) CAPABILITY SIGNALING

Abstract:

In some embodiments, during the SIP registration, the UE indicates in the REGISTER requests its support for ANBR as defined by ANBR attribute in the SDP and the P-CSCF indicates its support for the ANBR attribute in the SDP in the response for registration. In some embodiments, the P-CSCF serving a PLMN passes through the ANBR attribute in the SDP when the P-CSCF recognizes that the PLMN supports ANBR functionality. In some embodiments, the UE can include ANBR attribute in the SDP offer and answers when the P-CSCF indicates its support for the ANBR attribute in the SDP.