The IESG has approved the following document: - 'Updating TCP to support Rate-Limited Traffic' (draft-ietf-tcpm-newcwv-13.txt) as Experimental RFC This document is the product of the TCP Maintenance and Minor Extensions Working Group. The IESG contact persons are Spencer Dawkins and Martin Stiemerling. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-tcpm-newcwv/ Technical Summary This document describes an experimental proposal to allow TCP senders to restart data transfer quickly following an idle or less active period. This approach is expected to benefit applications that unable to send at the maximum rate permitted by the congestion window for some reasons. As a result, it aims to provide incentives for long-lived connections and to remove ad-hoc tweaks in some applications that try to maintain a large cwnd for future data transmissions. The approach can be viewed as an updated version of RFC2861 and it obsoletes RFC2861. Working Group Summary The draft has been discussed for around 4 years. There has been explicit support for the draft since the beginning. Main discussion points were some detailed mechanisms in the logic that are related to estimating path capacity and preserving congestion window size during applications are idle or less active. The initial intended status of the draft was PS, but it has been changed to Experimental as a result of the discussions. Linux kernel has the codes which address the same issue. Their algorithms are slightly different from the document. There had been discussions between the linux kernel implementers and the document authors; however, they haven't reached the consensus to replace the existing kernel codes until more solid evidences are found. The WG's conclusion is to publish the draft as an experimental and explore its efficiency and feasibility of this approach. Document Quality The document has been reviewed and discussed by multiple participants in the WG. Some discussions points raised by reviewers are listed in Section 9.1. The patches to FreeBSD and Linux kernel have been made by the efforts from the authors and other group. Personnel Yoshifumi Nishida is the Document Shepherd for this document. The Responsible Area Director is Martin Stiemerling
