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PADDING vs PING

"Lubashev, Igor" <ilubashe@akamai.com> Mon, 19 March 2018 14:23 UTC

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From: "Lubashev, Igor" <ilubashe@akamai.com>
To: IETF QUIC WG <quic@ietf.org>
Subject: PADDING vs PING
Thread-Topic: PADDING vs PING
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Date: Mon, 19 Mar 2018 14:23:19 +0000
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Since 4 proposals is not enough, let me propose the 5th one, which is an extension of Subodh's proposal.


  1.  PADDING does NOT count for bytes-in-flight (and does not require ACKs) when it is a part of ACK+PADDING packets.
  2.  PADDING does count for bytes-in-flight and does require ACKs otherwise (including in PADDING-only packets).
  3.  The difference between PADDING and PING in non-(ACK+PADDING) packets is that PING requires an ACK to be sent ASAP, while ACKing PADDING can be delayed, if the receiver does some ACK coalescing.


  *   Igor

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