A should consider incoming SDP as new offer and answer appropriately, quite likely as you mention the offer has not changed it would send a 180 or 200 OK response with same parameters as negotiated first time.
In any case A should not ignore the incoming re-invite as that would cause B to terminate the session, Section 14.1 UAC behaviour of RFC.
Hope it helps.
Regards,
-Tanu.
On Wed, Aug 19, 2009 at 12:58 PM, 孙永光 <sammanengineer@xxxxxxxxx> wrote:
Dear AllI have a question about How to respond the offer , the scenario is as followingA call B , and the offer and answer is ok , after a while , A receives a B 's REINVITE which includes the same SDP as it just answered beforenow, How does A respond it ?does A must respond the B's new offer with the same SDP as the offer it sent previously?could you give some advice ?ThanksSunYongGuang
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