6.2.24 RTCP Codec Control Commands and Indications

23.3343GPPIP Multimedia Subsystem (IMS) Application Level Gateway (IMS-ALG) - IMS Access Gateway (IMS-AGW) interface: Procedures descriptionsRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

Figure 6.2.24.1 shows the message sequence chart example for indicating "RTCP Codec Control Commands and Indications".

Figure 6.2.24.1: Procedure to indicate RTCP Codec Control Commands and Indications

This procedure is identical to that of clause 6.2.1 apart from the IMS-ALG optionally indicates that the IMS-AGW shall be prepared to receive and is allowed to send the RTCP CCM "FIR" and/or "TMMBR/TMMBN" feedback messages (as defined in IETF RFC 5104 [78]).