QoS for SIP

SDP can be used to convey conditions which must be met:

direction for QoS support: send, receive, or bidirectional
along with a “strength” parameter: optional or mandatory

If conditions can be met then a COMET is sent. See also RFC 4412.

Slide Notes

H. Schulzrinne and J. Polk, Communications Resource Priority for the Session Initiation Protocol (SIP), RFC Editor, RFC 4412, ISSN 2070-1721, February http://www.rfc-editor.org/rfc/rfc4412.txt Links to an external site.

Transcript

[slide471] Now, we talked a little bit before yesterday about COMET, the ability to specify in my SDP the preconditions that I want to have from a quality of service point of view before I set up the session. You can read more about that.