More Accurate ECN Feedback in TCP
draft-kuehlewind-tcpm-accurate-ecn-02
Document | Type |
This is an older version of an Internet-Draft whose latest revision state is "Replaced".
Expired & archived
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Authors | Mirja Kühlewind , Richard Scheffenegger | ||
Last updated | 2013-12-22 (Latest revision 2013-06-20) | ||
Replaced by | draft-ietf-tcpm-accurate-ecn, draft-ietf-tcpm-accurate-ecn | ||
RFC stream | (None) | ||
Formats | |||
Stream | Stream state | (No stream defined) | |
Consensus boilerplate | Unknown | ||
RFC Editor Note | (None) | ||
IESG | IESG state | Expired | |
Telechat date | (None) | ||
Responsible AD | (None) | ||
Send notices to | (None) |
This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:
Abstract
Explicit Congestion Notification (ECN) is an IP/TCP mechanism where network nodes can mark IP packets instead of dropping them to indicate congestion to the end-points. ECN-capable receivers will feedback this information to the sender. ECN is specified for TCP in such a way that only one feedback signal can be transmitted per Round-Trip Time (RTT). Recently, new TCP mechanisms like ConEx or DCTCP need more accurate ECN feedback information in the case where more than one marking is received in one RTT. This document specifies a different scheme for the ECN feedback in the TCP header to provide more than one feedback signal per RTT. Furthermore this document specifies a re-use of the Urgent Pointer in the TCP header if the URG flag is not set to increase the robustness of the proposed ECN feedback scheme.
Authors
Mirja Kühlewind
Richard Scheffenegger
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)