Re: QSPEC Questions

At 03:14 PM 11/6/2008, Hannes Tschofenig wrote:
>Al,
>
>shouldn't we provide that type of context in the document as well?

I agree, perhaps that's why I dug-up the details
and shared them on the list. These are non-trivial
calculations in some cases, but procedures exist.

Al




>They document does not appear self contained enough so that a regular reader
>can understand it easily.
>
>Ciao
>Hannes
>
>
> >-----Original Message-----
> >From: Al Morton [mailto:[email protected]]
> >Sent: 06 November, 2008 19:44
> >To: Xiaoming Fu; Hannes Tschofenig
> >Cc: [email protected]
> >Subject: Re: [NSIS] QSPEC Questions
> >
> >At 09:24 PM 11/1/2008, Xiaoming Fu wrote:
> >>Hannes Tschofenig wrote:
> >>...
> >>>* Where does the description for <Path Jitter>, <Path PLR> and <Path
> >>>PER> come from? There is no reference to another RFC given
> >in these sections.
> >>
> >>QSPEC ID suggested packet jitter is based on [rfc3393], but I am not
> >>sure whether (nominal) jitter values are directly addable
> >across multiple hops.
> >
> >It's possible to accumulate Jitter values, if they're measured
> >and specified in the appropriate form.
> >The more detailed references include Rec Y.1541,
> >http://tools.ietf.org/html/draft-ietf-ippm-spatial-composition-07
> >http://tools.ietf.org/html/draft-ietf-ippm-delay-var-as-01
> >>Also, is PLR or PER directly addable (or just a multiplication)?
> >
> >see the first two refs above.
> >Al
> >