m=audio 55000 RTP/AVP 0
a=qos-mech-send: rsvp nsis
a=qos-mech-recv: rsvp nsis
The current draft can be found here.
Topics of this blog are related to multimedia communication. In particular, streaming of multimedia content within heterogeneous environments enabling Universal Multimedia Experience (UME).
Thursday, November 20, 2008
Quality of Service (QoS) Mechanism Selection in SDP
The IESG (note: part of IETF) has approved a draft which enables negotiating which QoS mechanism to use for a particular media stream: end-to-end with a differentiation between upstream and downstream. Therefore, two new attributes have been defined: qos-mech-send and qos-mech-recv. However, currently only two QoS mechanisms are defined, namely nsis and rsvp. Other mechansims - existing or future ones - needs to be registerd through IANA. The following example describes a session which support RSVP and NSIS in both directions whith a preference on RSVP. That is, the order of the actual QoS mechanisms is important.
The current draft can be found here.
The current draft can be found here.
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