Re: [quicwg/base-drafts] RTT measurement using PATH_* frames (#2644)

Jana Iyengar <> Thu, 09 May 2019 02:43 UTC

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Subject: Re: [quicwg/base-drafts] RTT measurement using PATH_* frames (#2644)
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@rpaulo, #2637 removes that text. @ianswett is right, we'll need to caveat this at a minimum. I think it gets a bit tricky to use the PATH_CHALLENGE/RESPONSE for RTT if the RESPONSE can arrive on any path. The endpoint does not know what path will be used for data/acks, and it would have to assume that the path for CHALLENGE/RESPONSE will be the one used for data/acks, if it is to set its RTT estimate.

Perhaps we could say that an endpoint can use the CHALLENGE/RESPONSE RTT as a hint.

This will need some more thought.

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