Re: [tsvwg] Call for Adoption: draft-kuhn-tsvwg-careful-resume

Joerg Deutschmann <> Wed, 31 May 2023 19:51 UTC

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Date: Wed, 31 May 2023 21:51:02 +0200
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From: Joerg Deutschmann <>
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Subject: Re: [tsvwg] Call for Adoption: draft-kuhn-tsvwg-careful-resume
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Dear all,

to confirm my statement made at IETF 116: I think this is a useful draft 
and I plan to contribute (both simulations and prototype code) and 
collaborate with others.

Best regards,

On 16.05.23 09:22, Marten Seemann wrote:
> Hello TSV WG,
> During IETF 116 we discussed draft-kuhn-tsvwg-careful-resume [1] and the 
> sense in the room was strong support for adoption (29 people indicated 
> they would support work on this topic, 1 was against).
> Abstract
>      This document specifies careful convergence of Congestion Control
>      (CC), providing a cautious method that enables fast startup for a
>      wide range of connections or reconnections.
>      The method reuses a set of computed CC parameters that are based on
>      the previously observed path characteristics between the same pair of
>      transport endpoints, such as the bottleneck bandwidth, available
>      capacity, or the RTT.  These parameters are stored, allowing them to
>      be later used to modify the CC behavior of a subsequent connection.
>      The document also discusses assumptions and defines requirements
>      around how a sender utilizes these parameters to provide
>      opportunities for a connection to more quickly get up to speed (i.e.
>      utilize the available capacity).  It discusses how these changes
>      impact the capacity at a shared network bottleneck and the safe
>      response that is needed after any indication that the new rate is
>      inappropriate.  The method is expected to be appropriate to IETF
>      transports.
> This is a formal adoption call that will run 2 weeks, ending on May 31st 
> 2023 at 23:59 anywhere on earth [2]. Please respond to this email thread 
> with any comments indicating support or objection. In either case, 
> elucidation of your opinion would be appreciated.
> This email is to confirm the adoption as a TSVWG work item and to ask if 
> there are any other concerns or issues that the working group should 
> consider.
> Best wishes,
> Gorry and Marten
> (tsvwg co-chairs)
> [1] - 
> <>
> [2] - <>