Re: [xrblock] FW: I-D Action:draft-alvestrand-rtcweb-stats-registry-00.txt

Hi Qin,

Would you like me to forward your comments to rtcweb@ietf.org? You can
also subscribe to the list to follow the responses and participate in
the discussions, but I should warn you that performance statistics are a
fraction of the many problems this very active WG have on their hands. 

Dan

> -----Original Message-----
> From: Qin Wu [mailto:bill.wu@huawei.com]
> Sent: Tuesday, September 25, 2012 4:17 AM
> To: Romascanu, Dan (Dan); xrblock@ietf.org
> Subject: Re: [xrblock] FW: I-D Action:draft-alvestrand-rtcweb-stats-
> registry-00.txt
> 
> Interesting -00 draft.
> Have a quick look at this draft, I have the folowing comments:
> 1. Jitter should also refers to PDV draft since PDV draft provide
> another two measurement methods with different measurement precision
> which are different from "inter-arrival jitter" described in RFC3550.
> In the early version of PDV draft, we also accomodate "inter-arrival
> jitter" and support reporting inter-arrival jitter. However we remove
> inter-arrival jitter from this draft based on WG review since inter-
> arrival jitter use different measurement unit and has wider range.
> 2.ReceivedPacketCount
> Loss RLE report block can be used to report the packet received. It is
> more staightfoward to calculate ReceivedPacket Count based on  Loss
RLE
> report block defined in RFC3611 rather than based on MIB information
> defined in RFC2959. Also in some case, WebClient may not support SNMP.
> So I suggest to refer to section 4.1, RFC3611.
> 3. RecevedOctetCount
> Same as RecevedPacketCount. I think Loss RLE report block also can be
> used to calculate RecevedOctetCount.
> It is better to refer to section 4.1, RFC3611.
> 4. Section 4.2 Transport variable
> It is not clear how Transport variable is relate to Variables from
basic
> RTCP SR/RR defined in section 4.1, how transport vaiable is
calculated,
> e.g., what's the relationship between ReceivedPackets and
> ReceivedPacketcount? Are they the same variable?
> Is 4 transport variable defined in section 4.2 sufficient to measure
the
> performance of media stream? Why not refer to some variable defined in
> XRBLOCK WG?
> 
> Regards!
> -Qin
> 
>  ----- Original Message -----
> From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
> To: <xrblock@ietf.org>
> Sent: Monday, September 24, 2012 7:48 PM
> Subject: [xrblock] FW: I-D Action:draft-alvestrand-rtcweb-stats-
> registry-00.txt
> 
> 
> >I believe that this I-D (individual submission targeting the RTCWEB
WG)
> > is of interest for some of the folks who participate in XRBLOCK.
> > Reaching consistency between the metrics used by RTCP XR and RTCWEB
> > (when relevant) seems to be desirable.
> >
> > Regards,
> >
> > Dan
> >
> >
> >
> >
> > -----Original Message-----
> > From: i-d-announce-bounces@ietf.org
> > [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
> > internet-drafts@ietf.org
> > Sent: Monday, September 24, 2012 12:17 PM
> > To: i-d-announce@ietf.org
> > Subject: I-D Action: draft-alvestrand-rtcweb-stats-registry-00.txt
> >
> >
> > A New Internet-Draft is available from the on-line Internet-Drafts
> > directories.
> >
> >
> > Title           : A Registry for WebRTC statistics identifiers
> > Author(s)       : Harald T. Alvestrand
> > Filename        : draft-alvestrand-rtcweb-stats-registry-00.txt
> > Pages           : 8
> > Date            : 2012-09-24
> >
> > Abstract:
> >   This memo describes a registration procedure for statistics
> >   identifiers used in the WebRTC Javascript API to access
statistical
> >   information about a PeerConnection.
> >
> >   It also gives some identifiers that will, when approved, form the
> >   initial content of this registry.
> >
> >
> >
> > The IETF datatracker status page for this draft is:
> > https://datatracker.ietf.org/doc/draft-alvestrand-rtcweb-stats-
> registry
> >
> > There's also a htmlized version available at:
> > http://tools.ietf.org/html/draft-alvestrand-rtcweb-stats-registry-00
> >
> >
> > Internet-Drafts are also available by anonymous FTP at:
> > ftp://ftp.ietf.org/internet-drafts/
> >
> > _______________________________________________
> > I-D-Announce mailing list
> > I-D-Announce@ietf.org
> > https://www.ietf.org/mailman/listinfo/i-d-announce
> > Internet-Draft directories: http://www.ietf.org/shadow.html or
> > ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> > _______________________________________________
> > xrblock mailing list
> > xrblock@ietf.org
> > https://www.ietf.org/mailman/listinfo/xrblock