diff --git a/draft-ietf-quic-recovery.md b/draft-ietf-quic-recovery.md index 6a2ffa8627..886707fb43 100644 --- a/draft-ietf-quic-recovery.md +++ b/draft-ietf-quic-recovery.md @@ -502,10 +502,10 @@ expiration before it has the keys to process an acknowledgement. When a PTO timer expires, the PTO backoff MUST be increased, resulting in the PTO period being set to twice its current value. The PTO period is set based -on the latest RTT information when receiving an acknowledgement. The PTO backoff -is not decreased while the server is validating the client's address, to ensure -the client's anti-deadlock timer does not fire too aggressively when the server -does not yet have handshake data to send. +on the latest RTT information when receiving an acknowledgement. The client's +PTO backoff is not decreased while the server is validating the client's address, +to ensure the client's anti-deadlock timer does not fire too aggressively when +the server does not yet have handshake data to send. This exponential reduction in the sender's rate is important because consecutive PTOs might be caused by loss of packets or acknowledgements due to