METHODS AND APPARATUS FOR MEDIA TRANSMISSION IN TELECOMMUNICATIONS NETWORKS

摘要

There is provided a method of operating an IP Multimedia Subsystem Access Gateway (IMS-AGW) in order to support the transmission of media to and from an endpoint, using an IMS, wherein the endpoint implements an alternative media transport protocol other than Real-time Transport Protocol (RTP). The method comprises the IMS-AGW receiving instructions from an IMS Application Level Gateway (IMS-ALG) for an alternative media transport protocol connection with the endpoint and a RTP connection within the IMS, the instructions including more than one RTP payload type number and a dynamic binding of each of the more than one RTP payload type number to a statically defined codec identifier. The IMS-AGW stores the dynamic binding. Then, when translating between alternative media transport protocol packets and RTP packets, the IMS-AGW uses the stored binding to map between an RTP payload type number and a codec identifier used by the alternative media transport protocol.

主权项

1. A method of operating an IP Multimedia Subsystem, IMS, Access Gateway, IMS-AGW, in order to support the transmission of media to and from an endpoint, using an IMS, wherein the endpoint implements an alternative media transport protocol other than Real-time Transport Protocol, RTP, the method comprising:
receiving instructions from an IMS Application Level Gateway, IMS-ALG, for an alternative media transport protocol connection with the endpoint and a RTP connection within the IMS, the instructions including more than one RTP payload type number and a dynamic binding of each of the more than one RTP payload type number to a statically defined codec identifier; storing the dynamic binding of each of the more than one RTP payload type number to a statically defined codec identifier; and when translating between alternative media transport protocol packets carried by the alternative media transport protocol connection and the RTP packets carried by the RTP connection, using the stored binding to map between an RTP payload type number and a codec identifier used by the alternative media transport protocol.