diff --git a/draft-ietf-quic-transport.md b/draft-ietf-quic-transport.md index 2aa1d07160..be5d297ce6 100644 --- a/draft-ietf-quic-transport.md +++ b/draft-ietf-quic-transport.md @@ -2074,7 +2074,7 @@ describes the format and semantics of the core QUIC frame types. ## Variable-Length Integer Encoding {#integer-encoding} -QUIC frames use a common variable-length encoding for all non-negative integer +QUIC frames commonly use a variable-length encoding for non-negative integer values. This encoding ensures that smaller integer values need fewer octets to encode. @@ -3087,12 +3087,11 @@ actually lost. ### Special Considerations for Packetization Layer PMTU Discovery -The PADDING frame provides a useful option for PMTU probe packets that does not -exist in other transports. PADDING frames generate acknowledgements, but their -content need not be delivered reliably. PADDING frames may delay the delivery of -application data, as they consume the congestion window. However, by definition -their likely loss in a probe packet does not require delay-inducing -retransmission of application data. +The PADDING frame provides a useful option for PMTU probe packets. PADDING +frames generate acknowledgements, but they need not be delivered reliably. As a +result, the loss of PADDING frames in probe packets does not require +delay-inducing retransmission. However, PADDING frames do consume congestion +window, which may delay the transmission of subsequent application data. When implementing the algorithm in Section 7.2 of {{!PLPMTUD}}, the initial value of search_low SHOULD be consistent with the IPv6 minimum packet size.