Re: [MMUSIC] BUNDLE: Session bandwidth (Re: comments on draft-ietf-mmusic-sdp-bundle-negotiation-01)
Magnus Westerlund <magnus.westerlund@ericsson.com> Wed, 12 December 2012 09:55 UTC
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Date: Wed, 12 Dec 2012 10:55:23 +0100
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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To: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
References: <92B7E61ADAC1BB4F941F943788C088281048DF@xmb-aln-x08.cisco.com> <5097DF12.2020209@alvestrand.no> <92B7E61ADAC1BB4F941F943788C08828107CCF@xmb-aln-x08.cisco.com>
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Subject: Re: [MMUSIC] BUNDLE: Session bandwidth (Re: comments on draft-ietf-mmusic-sdp-bundle-negotiation-01)
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Hi,
Going through old emails. One important comment:
On 2012-11-05 21:04, Charles Eckel (eckelcu) wrote:
>>
>> Last time I looked b=CT was scoped to a whole conference ("supplied for
>> the session"), while b=AS was scoped to a single RTP session. But I may
>> be misinterpreting RFC 4566 section 5.8.
>
> I recommend using b=TIAS, as defined in RFC 3890. This parameter may be used at either the session or the media level, and it scope accordingly.
> What needs to be avoided is summing up the b=TIAS/AS values from the bundled media lines and using that as that bandwidth for the bundle even if it exceeds the b=TIAS/AS/CT value from the session level.
>
I would note that TIAS has no definition in Offer/Answer context. It is
soley defined for Declarative usage. Yes, I know it is being used in O/A
contexts, but I still don't understand how a receiver can state the
actual packet rate to be used by the sender to enable correct calculation.
Cheers
Magnus Westerlund
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- [MMUSIC] comments on draft-ietf-mmusic-sdp-bundle… Charles Eckel (eckelcu)
- [MMUSIC] BUNDLE: Session bandwidth (Re: comments … Harald Alvestrand
- Re: [MMUSIC] BUNDLE: Session bandwidth (Re: comme… Charles Eckel (eckelcu)
- Re: [MMUSIC] BUNDLE: Session bandwidth (Re: comme… Harald Alvestrand
- Re: [MMUSIC] BUNDLE: Session bandwidth (Re: comme… Charles Eckel (eckelcu)
- Re: [MMUSIC] BUNDLE: Session bandwidth (Re: comme… Magnus Westerlund
- Re: [MMUSIC] BUNDLE: Session bandwidth (Re: comme… Charles Eckel (eckelcu)
- Re: [MMUSIC] BUNDLE: Session bandwidth (Re: comme… Magnus Westerlund