Re: Adding ECN to Transport and Recovery

Magnus Westerlund <magnus.westerlund@ericsson.com> Fri, 08 June 2018 14:51 UTC

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Subject: Re: Adding ECN to Transport and Recovery
To: <quic@ietf.org>
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From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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Date: Fri, 8 Jun 2018 16:51:36 +0200
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WG,

The pull request has been updated so that each received CE mark will 
result in an immediate ACK. This will prevent the uncertainty of CE 
marks in related to the recovery period assuming no ACK loss, and having 
a fair chance to avoid the issue also at some ACK loss.

Secondly, I have added a security consideration section for ECN related 
issues.

My understanding of the views at the interim was that eliminating the 
additional ACK_ECN frame was desired. I will next update the pull 
request to use an updated ACK frame with a signaling bit for the present 
or absence of the ECN counters. The plan is to steal a bit in the ACK 
Block count and make that into a fixed 7-bit field rather than a 
variable length encoding. Limiting an ACK Frame to 128 ACK blocks.

Cheers

Magnus


Den 2018-05-28 kl. 22:29, skrev Magnus Westerlund:
> WG,
>
> I have been working on a Pull Request 
> (https://github.com/quicwg/base-drafts/pull/1372) that implements the 
> ECN proposal from the design team 
> (https://github.com/quicwg/base-drafts/wiki/ECN-in-QUIC) into 
> something reasonably well integrated into the current drafts. Thus, I 
> think it is time that people review and consider this proposal so that 
> any issues can be addressed.
>
> I would very much like to present at the interim this proposal, some 
> of the choices made, and determine if there are additional changes to 
> be made before merging this.
>
> Cheers
>
> Magnus Westerlund
>
> ----------------------------------------------------------------------
> Network Architecture & Protocols, Ericsson Research
> ----------------------------------------------------------------------
> Ericsson AB                 | Phone  +46 10 7148287
> Torshamnsgatan 23           | Mobile +46 73 0949079
> SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com
> ----------------------------------------------------------------------
>

-- 

Magnus Westerlund

----------------------------------------------------------------------
Network Architecture & Protocols, Ericsson Research
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Ericsson AB                 | Phone  +46 10 7148287
Torshamnsgatan 23           | Mobile +46 73 0949079
SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com
----------------------------------------------------------------------