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Re: [AVTCORE] New mile stone on support for leap seconds in RTP sessions

Kevin Gross <kevin.gross@avanw.com> Mon, 28 May 2012 15:16 UTC

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Date: Mon, 28 May 2012 09:16:37 -0600
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From: Kevin Gross <kevin.gross@avanw.com>
To: Marshall Eubanks <marshall.eubanks@gmail.com>
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Cc: avt@ietf.org
Subject: Re: [AVTCORE] New mile stone on support for leap seconds in RTP sessions
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Thank you for your comments. We will incorporate your suggestions.

Kevin Gross

On Mon, May 28, 2012 at 8:05 AM, Marshall Eubanks <
marshall.eubanks@gmail.com> wrote:

> On Wed, May 23, 2012 at 10:41 AM, Marshall Eubanks
> <marshall.eubanks@gmail.com> wrote:
> > On Wed, May 23, 2012 at 10:31 AM, Roni Even <ron.even.tlv@gmail.com>
> wrote:
> >> Hi,
> >>
> >> At last IETF meeting as part of the discussion on IDMS is was agreed
> that
> >> support for leap seconds in RTP session is relevant to RFC3550 and not
> only
> >> to IDMS.
> >>
> >> We would like to take a new milestone for AVTcore
> >>
> >>
> >>
> >> Nov 2012 - Submit support for leap seconds for RTP session  as Proposed
> >> Standard
> >>
> >> This will be an update to RFC 3550.
> >>
> >>
> >>
> >> We would also like to adopt
> >> http://www.ietf.org/id/draft-gross-avtcore-leap-second-00.txt as a
> starting
> >> point for this goal.
> >>
> >>
> >>
> >> There are two questions to the WGs
> >>
> >>
> >>
> >> 1.       Do you support the new milestone that will update RFC3550
> >>
> >
> > Support.
> >
> >> 2.       Do you think that we should adopt the above individual draft
> as an
> >> initial document
> >>
> >
> > Need to read it first. It just came out.
>
> Having read it, I support its adoption.
>
> Note :
>
> Section 3 :
>
> When
>   they occur, leap seconds are scheduled at the end of the last day of
>   December and/or June each year.
>
> That is not what the standard says, although it has been the practice.
> In no more than a century, if leap seconds continue, there
> will _have_ to be more frequent updates.
>
> From the USNO.
> http://www.usno.navy.mil/USNO/time/master-clock/leap-seconds
>
> "According to the CCIR Recommendation, first preference is given to
> the opportunities at the end of December and June, and second
> preference to those at the end of March and September. Since the
> system was introduced in 1972, only dates in June and December have
> been used. "
>
> I think that  CCIR Recommendation 460-4 (1986) should be added as a
> reference, and the above text be changed to
>
>   When
>   they occur, leap seconds are preferentially scheduled at the end of
> the last day of
>   December and/or June each year, although they could also occur at
> the end of March or September.
>
> Regards
> Marshall
>
>
>
> >
> > Marshall
> >
> >>
> >>
> >>
> >>
> >> Please respond by June 6th
> >>
> >>
> >>
> >> Thanks
> >>
> >> Roni Even
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> Audio/Video Transport Core Maintenance
> >> avt@ietf.org
> >> https://www.ietf.org/mailman/listinfo/avt
> >>
> _______________________________________________
> Audio/Video Transport Core Maintenance
> avt@ietf.org
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