Re: [Sip] SIPit 20 survey summary

["Jeroen van Bemmel" <jbemmel at zonnet.nl>]

A point for discussion: I believe below is evidence that the complexity of 
implementation may hinder deployment of emergency services, and may even be 
a root cause of things breaking down at a critical moment. People's lives 
may depend on a proxy interpreting location information properly

Especially for the use case of emergency calls, would it not be wise to 
select a much more simple approach/syntax, e.g.:
Emergency-Location: lat=x; lon=y

So no XML, no mime/multipart, as simple as possible (no complex semantics, 
usage-rules etc), something to reduce the barrier of 
implementation/deployment, and to reduce the risk for interop issues?

Regards,
Jeroen

Brian Rosen wrote:
> I'd like to point out one thing about this:
>
> > This is how they answered for multipart/mime:
> >     2% I break if someone sends me multipart/mime
> >    24% I pretend multipart/mime doesn't exist if someone sends it to
> >    me 24% I ignore multipart/mime but will proxy it or hand it to my
> > application if it shows up
> >    10% I try to do something useful with multipart/mime I receive,
> > but I never send it
> >     4% I ignore multipart/mime that I receive, but I try to do
> > something useful with multipart/mime I send
> >    24% I try to do something useful with multipart/mime I send and
> > receive
> >    12% Other
>
> Moving forward, SIP UAs and proxies will be required to support
> location-conveyance (currently draft-ietf-sip-location-conveyance-07)
> in order to support location for emergency calls (citizen to
> authority, like 1-1-2 or
> 9-1-1).  -conveyance requires multipart support.
>
> The consequences of not supporting emergency call location will be
> serious. I believe it is likely that there will eventually be
> regulatory requirements to support emergency calls in some
> jurisdictions.  Upgrades to several components of today's
> infrastructure will be needed before this all works, but stack
> vendors and UA developers should put multipart (and
> location-conveyance) on their development plans for next year at the
> latest.
>
> Brian
>
>
>
>
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_______________________________________________
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Use sipping at ietf.org for new developments on the application of sip