Re: Javascript based browser API to send/receive the RTCP APP messages

Thanks Randell for the support.

Implementing DataChannels to support the RTCP APP message has the following disadvantages.

*         Consumes the additional resource on the operator's NAT/Firewal to create the separate port/connection mapping.

*         In the RTCP-MUX scenarios, we need to have the separate DTLS session for the data channel just to send/receive the RTCP APP message which could have been done as SRTCP message on the same RTP port.

In Push To Talk Over Cellular applications, the Media Burst Control Protocol (MBCP) is used to exchange the floor/volley information which is based on the RTCP Application Packets (RTCP: APP). The MBCP protocol is defined by the Open Mobile Alliance(OMA) group is widely used for Push To Talk over cellular applications.

Please find the link to the specification below.

http://technical.openmobilealliance.org/Technical/release_program/docs/PoC/V2_0-20071002-C/OMA-TS-PoC_UserPlane-V2_0-20071002-C.pdf