[Sip] Codecs selection & QoS reservation--Manyfolks

["Chen, Xin (Xin)" <xchen2@lucent.com>]

Hi,

There a case in my mind:

A offers one m= line with 5 codecs also with precondition either local or
e2e, B answers with 3 of the 5, and according to manyfolks, both A and B
starts to QoS reservation either local or e2e.

Since there are 3 codecs can be used for communication, is there a problem
that A and B reserve the QoS based on different codecs, let's assume that
the codec A used for QoS reservation requires higher QoS that B used, will
there be a problem for the session?

This is like the one-of-N codecs problem mentioned in unify draft.

Shall we mandate that A and B always use the first codec for QoS reservation
since the first one is the prefered one? 

Xin Chen

Lucent Technologies
Tel: +44 1793 883137
Mobile: +44 7799 034668


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