Re: [ippm] New QUIC Packet Loss Measurement (draft-cfb-ippm-spinbit-measurements)

Thanks for sharing this.  From my perspective, this is an improvement upon
the previous proposal in terms of robustness.  This design feels very
similar to the spin bit, and seems trivial to implement, which are also
nice properties.

Also, QUIC doesn't really have retransmissions, so the 'R bit' name always
made me a bit uncomfortable.

I'm not saying QUIC should adopt this yet, but I'd be interested in seeing
a privacy analysis completed for it.

Ian

On Wed, Apr 8, 2020 at 4:25 AM Cociglio Mauro <mauro.cociglio=
40telecomitalia.it@dmarc.ietf.org> wrote:

> Dear QUIC WG Members.
>
>
>
> We submitted to IPPM WG a draft where we described a new 2 bit packet loss
> methodology (
> https://tools.ietf.org/html/draft-cfb-ippm-spinbit-measurements-01).
>
> *The measurement of packet loss is under discussion in QUIC WG and our
> draft introduces two alternatives about it.*
>
> *T**he first one is a spin-bit dependent signal and uses a single bit.
> The second one, described in the following linked slides, is a
> standalone solution based on a two bits loss signal and on alternate
> marking (RFC8321)..*
>
> *This last methodology **improves, in our opinion, the algorithm proposed
> by Orange and Akamai described in* *https://tools.ietf.org/html/draft-ferrieuxhamchaoui-quic-lossbits-03
> <https://tools.ietf.org/html/draft-ferrieuxhamchaoui-quic-lossbits-03>**.*
>
>
>
> *The 2 bits are the sQuare bit (Q-bit) and the Reflection square bit
> (R-bit).*
>
> *The Q-bit doesn’t change from the Ferrieux-Hamchaoui draft but the R-bit
> substitutes the L-bit.*
>
> *This avoids the L-bit dependence from an internal protocol variable, a
> problem raised in the last QUIC interim meeting.*
>
>
>
> You can find the slides, we prepared for the IPPM interim meeting, at the
> following link:
> https://github.com/ietf-ippm/meeting-materials/blob/aa486f7ead28b9f55c5ef499e5c9ed33ab06daf9/ietf107-virtual/Slides/07-spinbit-measurements.pdf
>
>
>
> Comments and suggestions are always welcome.
>
>
>
> Of course we are available to present our proposals in the next QUIC WG
> meeting or to arrange a Webex side meeting if needed.
>
>
>
> Best regards.
>
>
>
> Mauro, Fabio, Giuseppe, Massimo and Riccardo
>
>
>
>
>
> _____________________
>
> Mauro Cociglio
>
> TIM - CT.TA.EI
>
> Via G. Reiss Romoli, 274
>
> 10148 - Torino (Italy)
>
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>
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>
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