Re: [xrblock] Rearranging the fields in the loss concealment report.

"Huangyihong (Rachel)" <rachel.huang@huawei.com> Fri, 06 November 2015 01:37 UTC

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From: "Huangyihong (Rachel)" <rachel.huang@huawei.com>
To: Varun Singh <vsingh.ietf@gmail.com>
Thread-Topic: Rearranging the fields in the loss concealment report.
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Date: Fri, 6 Nov 2015 01:37:12 +0000
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Subject: Re: [xrblock] Rearranging the fields in the loss concealment report.
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Hi Varun,

I don't have strong opinion on this. The change does not affect the meaning or terminology of the block at all except for parsing purpose. But do we need to change it before submitting to IESG if the proposal is agreed in the WG? I think we were already agreed to submit 05 to IESG in yesterday's meeting. 

BR,
Rachel

-----邮件原件-----
发件人: Varun Singh [mailto:vsingh.ietf@gmail.com] 
发送时间: 2015年11月6日 9:22
收件人: Huangyihong (Rachel)
抄送: xrblock@ietf.org
主题: Rearranging the fields in the loss concealment report.

Hi Rachel,

On Thu, Nov 5, 2015 at 10:47 AM, Varun Singh <vsingh.ietf@gmail.com> wrote:
> For making the parser easier, could the optional part of the packet be 
> at the end?

I should have explained this in more detail in my email. my proposal was to change the report block from:


    0               1               2               3
    0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |    BT=VLC     | I | V |  RSV  |       block length            |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                         SSRC of Source                        |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                       Impaired Duration                       |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                      Concealed Duration                       |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                  Mean Frame Freeze Duration (optional)        |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |    MIFP       |    MCFP       |     FFSC      |     Reserved  |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

to the following:
In this case the optional 32-bits are set at the bottom of the packet.

    0               1               2               3
    0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |    BT=VLC     | I | V |  RSV  |       block length            |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                         SSRC of Source                        |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                       Impaired Duration                       |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                      Concealed Duration                       |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |    MIFP       |    MCFP       |     FFSC      |     Reserved  |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                  Mean Frame Freeze Duration (optional)        |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Regards,
Varun