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Status:

INFORMATIONAL

Authors:

S. Floyd
A. Arcia
D. Ros
J. Iyengar

Stream:

INDEPENDENT

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DOI:  https://doi.org/10.17487/RFC5690

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Abstract

This document describes a possible congestion control mechanism foracknowledgement (ACKs) traffic in TCP. The document specifies anend-to-end acknowledgement congestion control mechanism for TCP thatuses participation from both TCP hosts: the TCP data sender and theTCP data receiver. The TCP data sender detects lost or ExplicitCongestion Notification (ECN)-marked ACK packets, and tells the TCP datareceiver the ACK Ratio R to use to respond to the congestion on the reversepath from the data receiver to the data sender. The TCP data receiver sendsroughly one ACK packet for every R data packets received. This mechanism isbased on the acknowledgement congestion control in the Datagram CongestionControl Protocol's (DCCP's) Congestion Control Identifier (CCID) 2. Thisacknowledgement congestion control mechanism is being specified for furtherevaluation by the network community. This document is not an Internet Standards Track specification; it is published for informational purposes.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.