答复: Re: About offeranswer draf t:

Hi,

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OKUMURA Shinji <[email protected]> 
发件人:  [email protected]
2010-04-15 17:07

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Re: [Sipping] About offeranswer draft:






Hi,

I think "*same* SDP is mandatory for UAS's behavior",

[Gao] As you think *same* if mandatory, why not just ignore the real 
answer, if it has gotten one in one previous unreliable response?

and
"That same exact answer MAY also be placed in any provisional
responses sent prior to the answer." means it adequately for me.

Regards,
Shinji


>>Hi Paul and Shinji,
>>
>>I guess I can converge my discussion on the point, should UAC refresh 
the 
>>media plane by the real answer? 
>>
>>Or, just ignore the real answer, if it has gotten one in one previous 
>>unreliable response?
>
>IMO UAC should refresh the current view of a session description
>by the real answer.
>
>[Gao] By myself, I also prefer this one.
> 
>>And no matter what direction we choose, we should do the evaluation 
about 
>>whether it is violation/correction of RFC3261.
>
>I think, in RFC3261 UAC's behavior is described based on the
>premise that UAS never include the different SDP from the answer
>into the prior unreliable responcse.
>It is absolutely an implicit premise. But it is not bad, I think.
>
>So then we can think that UAC's behavior for the different SDP
>is not described in RFC. Therefor it can be BCP and does not
>violate RFC.
>
>[Gao] If we want to BCP thing for different SDP, we need to clarify that 
>*same* SDP is not mandatory for UAS's behavior.
>I am not sure whether "*same* SDP is not mandatory for UAS's behavior" is 

>normative change from RFC3261 or not.
>
>Quod Erat Demonstrandum.
>
>Regards,
>Shinji
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