Re: [MEDIACTRL] SIP Control Framework - Issues

[Diego B <[e-mail]>]

Hi;
I agree with your reflections.
In the SDP case, there is something MMUSIC have to handle or agree ?

Regards
Diego B

Chris Boulton wrote:
>
> There are a couple of issues to discuss for the next version of the 
> SIP Control Framework and it would be extremely useful to get the Work 
> Groups input.
>
> - SIP option tag in SIP Control Framework
>
> The draft currently defines a SIP option tag for negotiation of the 
> core SIP Control Framework 
> (http://www.ietf.org/internet-drafts/draft-boulton-sip-control-framework-05.txt). 
> If the group decides to proceed down this route we will need to hand 
> this over to the SIP work group and its experts. On reflection, I feel 
> that this might not be an appropriate use of a Sip option tag. I have 
> taken MSRP 
> (http://www.ietf.org/internet-drafts/draft-ietf-simple-message-sessions-19.txt) 
> as the driving example. It also used SDP to convey a media type that 
> defines its support + connection details. I personally think that we 
> should remove the SIP option tag from the SIP Control Framework and 
> rely on SDP negotiation.
>
> - SIP ‘Control-Packages’ header in SIP Control Framework
>
> The current version of the draft uses a Control-Packages SIP header to 
> negotiate the actual extension packages that can be used on a Control 
> Channel. This work would also need to be handed over to the SIP 
> working group. On reflection it is (in my opinion) not the best place 
> to negotiate this information. I suspect it should be done within the 
> control channel itself (either re-using or defining a new primitive) 
> once the channel is set up. This also allows packages to be 
> dynamically added/removed from the session without causing SIP 
> signalling to be triggered.
>
> Please think carefully about these two issues as they impact heavily 
> the next version of the document.
>
> Chris.
>
>
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