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Remove a redundant paragraph about PTO #3904

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merged 2 commits into from Jul 14, 2020
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Remove a redundant paragraph about PTO #3904

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2e22c63
Remove a redundant paragraph
ianswett Jul 14, 2020
fa6a108
Update draft-ietf-quic-recovery.md
ianswett Jul 14, 2020
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15 changes: 5 additions & 10 deletions draft-ietf-quic-recovery.md
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Expand Up @@ -565,11 +565,6 @@ PATH_RESPONSE to set the initial RTT (see kInitialRtt in
{{constants-of-interest}}) for a new path, but the delay SHOULD NOT be
considered an RTT sample.

Prior to handshake completion, when few to none RTT samples have been
generated, it is possible that the probe timer expiration is due to an
incorrect RTT estimate at the client. To allow the client to improve its RTT
estimate, the new packet that it sends MUST be ack-eliciting.

Initial packets and Handshake packets could be never acknowledged, but they are
removed from bytes in flight when the Initial and Handshake keys are discarded,
as described below in {{discarding-packets}}. When Initial or Handshake keys are
Expand Down Expand Up @@ -623,11 +618,11 @@ its first flight.
### Sending Probe Packets

When a PTO timer expires, a sender MUST send at least one ack-eliciting packet
in the packet number space as a probe, unless there is no data available to
send. An endpoint MAY send up to two full-sized datagrams containing
ack-eliciting packets, to avoid an expensive consecutive PTO expiration due
to a single lost datagram or transmit data from multiple packet number spaces.
All probe packets sent on a PTO MUST be ack-eliciting.
in the packet number space as a probe. An endpoint MAY send up to two
full-sized datagrams containing ack-eliciting packets, to avoid an expensive
consecutive PTO expiration due to a single lost datagram or transmit data
from multiple packet number spaces. All probe packets sent on a PTO MUST be
ack-eliciting.

In addition to sending data in the packet number space for which the timer
expired, the sender SHOULD send ack-eliciting packets from other packet
Expand Down