Re: [rmcat] Magnus Westerlund's No Objection on draft-ietf-rmcat-nada-12: (with COMMENT)
"Xiaoqing Zhu (xiaoqzhu)" <xiaoqzhu@cisco.com> Fri, 06 September 2019 16:41 UTC
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From: "Xiaoqing Zhu (xiaoqzhu)" <xiaoqzhu@cisco.com>
To: Magnus Westerlund <magnus.westerlund@ericsson.com>, The IESG <iesg@ietf.org>
CC: "draft-ietf-rmcat-nada@ietf.org" <draft-ietf-rmcat-nada@ietf.org>, Martin Stiemerling <mls.ietf@gmail.com>, "rmcat-chairs@ietf.org" <rmcat-chairs@ietf.org>, "rmcat@ietf.org" <rmcat@ietf.org>
Thread-Topic: Magnus Westerlund's No Objection on draft-ietf-rmcat-nada-12: (with COMMENT)
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Date: Fri, 06 Sep 2019 16:41:23 +0000
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Subject: Re: [rmcat] Magnus Westerlund's No Objection on draft-ietf-rmcat-nada-12: (with COMMENT)
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Hi Magnus, Thanks for your review of this draft. Regarding your question on transmission timestamping mechanism in Section 5.1.1.: our current implementation haven't yet considered the Transmission Time offset in header extension, but rather simply generated a timestamp via local system clock and embedded that information in the transport packet header. We've revised the description accordingly, to more accurately describe what the current implementation does and the potential solution via a standardized format: https://tools.ietf.org/html/draft-ietf-rmcat-nada-13 , in Sec. 5.1.1: ... For experimental implementations, instead of relying on RTP timestamps and the transmission time offset RTP header extension [RFC5450], the NADA sender can generate its own timestamp based on local system clock and embed that information in the transport packet header. Best regards, Xiaoqing On 9/5/19, 8:58 AM, "Magnus Westerlund via Datatracker" <noreply@ietf.org> wrote: Magnus Westerlund has entered the following ballot position for draft-ietf-rmcat-nada-12: No Objection When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-rmcat-nada/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- A Question regarding Section 5.1.1. This section recommends using a NADA specific transmission timestamping mechanism embedded in the transport. What about the header extension for Transmission Time offsets? Are there a reason to not discuss using that a potential solution for providing that. I know it has the downside of being expressed in RTP payload format timescales and not in a nice and likely more compact milisecond, but it is a standardized solution that can provide the necessary signal.
- [rmcat] Magnus Westerlund's No Objection on draft… Magnus Westerlund via Datatracker
- Re: [rmcat] Magnus Westerlund's No Objection on d… Xiaoqing Zhu (xiaoqzhu)