[Bloat] Re: IETF proposal for provisioning ISP ratelimiter rate to RG

[bob.mcmahon@umbernetworks.com]

Herbert’s point about wireless indicating changes is exactly the problem 
we have been working on. Mikael’s draft covers the ISP informing the RG 
of the access rate; the wireless side is the complementary, and much 
faster-moving, half of that picture.

The goal of Fi-Wi is to make Wi-Fi and the WAN link a coupled, 
control-theoretic system, using the TXOP as the fundamental unit of 
wireless work. Scheduling, queue management, and rate adaptation can 
then be coordinated across both sides of the access path using real-time 
state rather than having each layer guess independently.

This simulation illustrates the challenge:

https://www.umbernetworks.com/mcs_fiwi.php

The values are simulated, not measured, so please treat it as a 
visualization rather than an experimental result.

I discussed the approach in this DPDK presentation:

https://youtu.be/kLdIXVPKT1I?si=03vZ3QB5zq2Whe69

Bob

> Lovely, thanks for sharing, Mikael!
> 
> To quote my LibreQoS colleague Herbert:
> 
> "THAT is a feature I've been asking for a couple of decades. I think 
> Dave
> [Täht] was the same way. We both also wanted some standardized 
> signalling
> so wireless could indicate changes, but that's a good start."
> 
> 
> All the best,
> 
> Frank
> 
> Frantisek (Frank) Borsik
> 
> 
> *In loving memory of Dave Täht: *1965-2025
> 
> https://libreqos.io/2025/04/01/in-loving-memory-of-dave/
> 
> 
> https://www.linkedin.com/in/frantisekborsik
> 
> Signal, Telegram, WhatsApp: +421919416714
> 
> iMessage, mobile: +420775230885
> 
> Skype: casioa5302ca
> 
> frantisek.borsik@gmail.com
> 
> 
> On Thu, Jul 23, 2026 at 7:15 PM Mikael Abrahamsson via Bloat <
> bloat@lists.bufferbloat.net> wrote:
> 
>> 
>> https://datatracker.ietf.org/doc/draft-giese-dhcp-rate-signaling/
>> 
>> https://mailarchive.ietf.org/arch/browse/int-area/?gbt=1&page=1&qdr=m
>> 
>> This might be of interest to people on this list, as the age old trick 
>> of
>> manually creating a shaper with slightly below ISP configured speed, 
>> and
>> then running AQM in it to avoid the ISP FIFO now could automatically 
>> be
>> enabled by means of the ISP informing the RG of said rate.
>> 
>> Above is a link to mailing list discussion I started right after the
>> int-area presentation.
>> 
>> --
>> Mikael Abrahamsson    email: swmike@swm.pp.se
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