Telefonaktiebolaget Lm Ericsson (publ)

Staffan Persson

Ingemar Lindblad

Ramona Bunea

Bengt Wretman

A method of exchanging content between a User Equipment, UE, and an Application Server, AS, of an IP Multimedia Subsystem, IMS, or between the UE and a peer UE. The method comprises establishing a Session Initiation Protocol, SIP, session between said messaging resource function and the AS; establishing a Message Session Relay Protocol, MSRP, session between the UE and a messaging resource function of the IMS; and exchanging content between the first mentioned UE and the messaging resource function in messages sent over the established MSRP session.

Messaging resource function

A method performed by a network node for handling a communication session in a communication network using a session description protocol, SDP, for communication sessions is provided. The network node sends, on one or both established communication sessions, a request with an indication. The indication indicates a request of one or more mappings of a payload type number to a codec associated to the communication session. The network node receives a response including one or more response indications. A response indication indicates one or more mappings of a payload type number to a codec associated to the communication session. The network node further sends a request indication indicating a mapping of a payload type number to a codec suggested to use in an offer message generated by the at least one entity. The mapping is selected based on the one or more response indications in the received response.

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Kista, Sweden

Staffan Persson