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Re: [quicwg/base-drafts] Improve ACK_ECN frame encoding (e.g., use bit-vector) (#1439)

MikkelFJ <notifications@github.com> Thu, 14 June 2018 13:03 UTC

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Subject: Re: [quicwg/base-drafts] Improve ACK_ECN frame encoding (e.g., use bit-vector) (#1439)
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> A receiver can suppress duplicates to some extent, but it can never be perfect.

and

> They need to be idempotent because there is no reliable way for a receiver to tell if a packet it has received is a duplicate.

this is not quite true if one choose not to receive packets with packet numbers below a certain threshold. Above the threshold duplicates can be perfectly filtered and below the threshold they can also be perfectly filtered, but below the threshold non-duplicates might also get filtered. However, in this case fast retransmission will likely already have a new packet inbound with similar content.


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