Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-cases-and-requirements-10

Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-cases-and-requirements-10 - emergency service access

Harald Alvestrand <harald@alvestrand.no> Mon, 04 February 2013 03:31 UTC

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From: Harald Alvestrand <harald@alvestrand.no>
Date: Mon, 04 Feb 2013 04:31:26 +0100
To: Gunnar Hellstrom <gunnar.hellstrom@omnitor.se>, rtcweb@ietf.org
Message-ID: <8bef5302-3bc7-43c6-ba81-d75627c97938@email.android.com>
Subject: Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-cases-and-requirements-10 - emergency service access
Precedence: list

All of the mentioned features except loopback belong in signalling, not in rtcweb.

Gunnar Hellstrom <gunnar.hellstrom@omnitor.se> wrote:

>
>> Martin said:
>>
>> "I'm highly sympathetic to the view that emergency services should
>not be regarded as special.  The argument goes: "If emergency services
>are special, how do I know that the special parts work when I need
>them?  They aren't used all the time."
>>
>> [BA] Exactly.   If all of the emergency services functionality that
>we need isn't already covered by mainstream WebRTC use cases and
>requirements, the answer isn't to change the use cases.   Even use
>cases that we expect to be frequently utilized will have bugs.   So why
>would anyone want to risk their life on non-mainstream use cases that
>are much less likely to be extensively used and tested?
>(changed subject line to emergency service access )
>
>Right, the emergency calls need to be as mainstream as possible.
>But there are RFCs about how emergency calls are expected to appear,
>and 
>they require a couple of "special" actions from the client and service 
>provider.
>Since next generation emergency services are now planned based on these
>
>RFCs it is best to make sure rtcweb based systems can comply.
>
>It is mainly:
>-provide location
>-use SIP
>-use supported codecs for audio, video and real-time text
>-either client or server use urn:service:sos.... addressing
>
>In order to test if it really works, a method for testing is specified 
>in RFC 6443, requesting automatic loopback of a couple of RTP packets, 
>and an opportunity to verify that the right emergency service was
>reached.
>(I am a bit afraid that the load of these test calls will be 
>overwhelming for the network resources compared to real calls, and
>might 
>need a rethinking, but they at least do not load any operational human 
>call taker. So, the mechanisms you ask for are there.)
>
>It is true with all features in rtcweb that they are not required to be
>
>used in all application implementations. But they need to be described 
>and included in the support from the browsers and APIs.
>
>Thus, for emergency services, I assume that we would need to specify 
>protocol elements and API:s for approximately the following:
>
>-Mark call as emergency call ( From application to browser )
>-Provide location with the call
>-Provide urn: address ( possibly, can also be handled by server )
>-Provide call-back address
>-Provide user modality and language preferences and capabilities.
>
>This is not much and not much to vary between countries. If variations 
>between countries are needed, they should be concentrated in the
>server.
>
>/Gunnar
>_______________________________________________
>rtcweb mailing list
>rtcweb@ietf.org
>https://www.ietf.org/mailman/listinfo/rtcweb

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Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-… Bernard Aboba
Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-… Ted Hardie
Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-… Martin Thomson
Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-… Bernard Aboba
Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-… Gunnar Hellstrom
Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-… Harald Alvestrand
Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-… Ted Hardie
Re: [rtcweb] WG Last Call: draft-ietf-rtcweb-use-… Ted Hardie