Re: [xrblock] (2nd) WGLC for draft-ietf-xrblock-rtcp-xr-jb

Colin Perkins <> Mon, 22 April 2013 14:57 UTC

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Date: Mon, 22 Apr 2013 15:57:25 +0100
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Subject: Re: [xrblock] (2nd) WGLC for draft-ietf-xrblock-rtcp-xr-jb
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On 8 Apr 2013, at 15:06, Romascanu, Dan (Dan) wrote:
> This is the second WGLC for the Internet-Draft 'RTP Control Protocol (RTCP) Extended Report (XR) Block for Jitter Buffer Metric Reporting'. Please send your comments, questions, and concerns to the WG list before Monday 4/22 COB. If you have no comments or questions and you believe that this document is ready for submission to the IESG for consideration as a Proposed Standard, please send a message stating this. 
> The latest version of the document can be retrieved from

I think this is essentially ready, but I did have a quick comments on re-reading the draft:

How is the jitter buffer nominal delay calculated for an interval metric or for a cumulative metric? The draft talks about "the current nominal jitter buffer delay", which makes sense for a sampled metric, but it's not clear how it applies for an interval or as a cumulative metric?

It might also be necessary to clarify the other jitter buffer metrics for the cumulate case.

Colin Perkins