[xrblock] 答复: I-D Action:draft-ietf-xrblock-rtcp-xr-meas-identity-01.txt

["Rachel Huang(yihong)" <[e-mail]>]

The intention that we use the measurement identity is to reduce the duplicated fields in every metric XR blocks, to save bandwidth when we're monitoring. It will benefit those systems whose resources are not rich, for example, systems with low-bitrate links. While in those systems, the RTCP XR packets may not be able to compound together, which has been described in [RFC5506]. And in this case, these RTCP XR blocks may have to be sent with measurement indentity block one by one, and I don't think it can achieve the original intention. 
So I agree with Colin. my opinion is that we don't need to involve important fields (like durations) which are closely connected with metric XR blocks.

______________________________________
·¢¼þÈË: [e-mail] [[e-mail]] ´ú±í Schwarz, Albrecht (Albrecht) [[e-mail]]
·¢ËÍʱ¼ä: 2011Äê10ÔÂ13ÈÕ 19:12
µ½: Colin Perkins; Qin Wu
Cc: [e-mail]
Ö÷Ìâ: Re: [xrblock]       I-D     Action:draft-ietf-xrblock-rtcp-xr-meas-identity-01.txt

My opinion:

When we would use the measurement identity SDES item, measurement information XR block, together with an associated set of a number of metric XR blocks, - e.g. in performance monitoring and reporting architecture as a network overlay -, then the measurement duration (cumulative & interval) would be normally common characteristics across all metrics.

Don't see the use case for metric-individual measurement duration settings.

Thus, could be kept in the measurement information XR block in my opinion.

My .03 €,
Albrecht



> -----Original Message-----
> From: [e-mail]
> [mailto:[e-mail]] On Behalf Of Colin Perkins
> Sent: Donnerstag, 13. Oktober 2011 12:17
> To: Qin Wu
> Cc: [e-mail]
> Subject: Re: [xrblock] I-D
> Action:draft-ietf-xrblock-rtcp-xr-meas-identity-01.txt
>
> Qin,
>
> Thanks - this addresses most of my comments on the previous version.
>
> I'm still somewhat unconvinced that we need a separate report
> to convey measurement duration, rather than including it in
> each report block. It can avoid duplication, I agree, but at
> the cost of potential ambiguity if the measurement duration
> block is not sent. My preference is to accept the potential
> duplication, to avoid the failure condition, but it would be
> interesting to hear other opinions.
>
> Colin
>
>
>
> On 13 Oct 2011, at 09:28, Qin Wu wrote:
> > Here is version 01.
> >
> http://www.ietf.org/internet-drafts/draft-ietf-xrblock-rtcp-xr-meas-id
> > entity-01.txt This revision adds  the XR Block format to convey
> > additional measurement informtation. We are still using
> SDES item format to carry APSI. This was brought up by Colin.
> >
> > These additional measurement information is still useful becos
> > draft-ietf-avt-rtcp-xr-burst-gap-discard-02 and
> > draft-ietf-avt-rtcp-xr-burst-gap-loss-02
> > depends on this information to calculate the whole number
> of packets expected.
> >
> > For diff:
> >
> http://tools.ietf.org/rfcdiff?url2=draft-ietf-xrblock-rtcp-xr-meas-ide
> > ntity-01.txt
> >
> > Regards!
> > -Qin
> > ----- Original Message -----
> > From: <[e-mail]>
> > To: <[e-mail]>
> > Cc: <[e-mail]>
> > Sent: Thursday, October 13, 2011 11:15 AM
> > Subject: [xrblock] I-D
> > Action:draft-ietf-xrblock-rtcp-xr-meas-identity-01.txt
> >
> >
> >> A New Internet-Draft is available from the on-line
> Internet-Drafts directories. This draft is a work item of the
> Metric Blocks for use with RTCP&#39;s Extended Report
> Framework Working Group of the IETF.
> >>
> >> Title           : Measurement Identity and information
> Reporting using SDES item and XR Block
> >> Author(s)       : Geoff Hunt
> >>                         Alan Clark
> >>                         Qin Wu
> >> Filename        : draft-ietf-xrblock-rtcp-xr-meas-identity-01.txt
> >> Pages           : 13
> >> Date            : 2011-10-12
> >>
> >>  This document defines a RTCP SDES item and a RTCP XR
> Block carrying
> >> parameters which identify a measurement, to which one or
> more other
> >> RTCP XR Report Blocks may refer.
> >>
> >>
> >> A URL for this Internet-Draft is:
> >>
> http://www.ietf.org/internet-drafts/draft-ietf-xrblock-rtcp-xr-meas-i
> >> dentity-01.txt
> >>
> >> Internet-Drafts are also available by anonymous FTP at:
> >> ftp://ftp.ietf.org/internet-drafts/
> >>
> >> This Internet-Draft can be retrieved at:
> >>
> ftp://ftp.ietf.org/internet-drafts/draft-ietf-xrblock-rtcp-xr-meas-id
> >> entity-01.txt _______________________________________________
> >> xrblock mailing list
> >> [e-mail]
> >> https://www.ietf.org/mailman/listinfo/xrblock
> > _______________________________________________
> > xrblock mailing list
> > [e-mail]
> > https://www.ietf.org/mailman/listinfo/xrblock
>
>
>
> --
> Colin Perkins
> http://csperkins.org/
>
>
>
> _______________________________________________
> xrblock mailing list
> [e-mail]
> https://www.ietf.org/mailman/listinfo/xrblock
>
_______________________________________________
xrblock mailing list
[e-mail]
https://www.ietf.org/mailman/listinfo/xrblock