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Re: [Ecn-in-quic] ECN in QUIC update and questions

Ingemar Johansson S <ingemar.s.johansson@ericsson.com> Mon, 08 January 2018 11:29 UTC

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From: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
To: "Roni Even (A)" <roni.even@huawei.com>, "ecn-in-quic@ietf.org" <ecn-in-quic@ietf.org>
CC: "De Schepper, Koen (Nokia - BE/Antwerp)" <koen.de_schepper@nokia-bell-labs.com>
Thread-Topic: ECN in QUIC update and questions
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Date: Mon, 08 Jan 2018 11:29:42 +0000
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Subject: Re: [Ecn-in-quic] ECN in QUIC update and questions
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Hi

Thanks, I corrected the bytes-packet error. The document will not talk about congestion handling in this version, this is left was a later exercise and the intention is that ECT(0) and ECT(1) should be handled as per the recommendations in the  ECN experiments draft (soon RFC). The use of ECT(0) or ECT(1) will be a sender decision as the congestion control is on the sender side.

/Ingemar


From: Roni Even (A) [mailto:roni.even@huawei.com]
Sent: den 8 januari 2018 12:23
To: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>; ecn-in-quic@ietf.org
Cc: De Schepper, Koen (Nokia - BE/Antwerp) <koen.de_schepper@nokia-bell-labs.com>
Subject: RE: ECN in QUIC update and questions

Hi,

I noticed that there are still places where bytes are used instead of packets "sufficient with a report of accumulated number of bytes " and "number of ECT marked bytes(or packets) ".

Are you going to say something about when to use ECT(0) and when ECT(1). Is this a sender decision and how is it made?

I understand that the document will not talk about congestion handling, so is a different congestion handling for ECT(0) and ECT(1) will be discussed in the QUIC recovery draft or do we need another document?

Roni Even

From: Ecn-in-quic [mailto:ecn-in-quic-bounces@ietf.org] On Behalf Of Ingemar Johansson S
Sent: Monday, January 08, 2018 11:53 AM
To: ecn-in-quic@ietf.org<mailto:ecn-in-quic@ietf.org>
Cc: Ingemar Johansson S; De Schepper, Koen (Nokia - BE/Antwerp)
Subject: [Ecn-in-quic] ECN in QUIC update and questions

Hi

Hope that you have started the new year with lots of new energy.
We (me and Koen) have updated https://github.com/quicwg/base-drafts/wiki/ECN-in-QUIC . The main changes are that a lot of superfluous text is removed, for instance there is now only 1 alternative for the ACK+ECN frame. In addition all the extra text that discussed the timestamps is now gone. The ECN capability check is also clarified. Furthermore it is made possible to set ECT also after the ECN capability check.

There are some questions

  1.  I have added some text that outlines how the overhead can be reduced, this text is somewhat speculative and needs more details to qualify as specification text. Should we have this text in the first draft version or do you prefer that it is removed ?.
  2.  Given that this work is presented at the interim, is it necessary to write up a draft or is it sufficient to present the wiki ?


/Ingemar

==================================
Ingemar Johansson  M.Sc.
Master Researcher

Ericsson Research
Network Protocols & E2E Performance
Labratoriegränd 11
971 28, Luleå, Sweden
Phone +46-1071 43042
SMS/MMS +46-73 078 3289
ingemar.s.johansson@ericsson.com<mailto:ingemar.s.johansson@ericsson.com>
www.ericsson.com

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