Fwd: Protocol Action: 'Datagram Congestion Control Protocol (DCCP)' to Proposed Standard
"Joel M. Halpern" <joel@stevecrocker.com> Wed, 03 August 2005 14:25 UTC
Message-Id: <WED.3.AUG.2005.102554.0400.>
Date: Wed, 03 Aug 2005 10:25:54 -0400
From: "Joel M. Halpern" <joel@stevecrocker.com>
Subject: Fwd: Protocol Action: 'Datagram Congestion Control Protocol (DCCP)' to Proposed Standard
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For peoples information, DCCP is now approved for publication as a PS. Yours, Joel >From: The IESG <iesg-secretary@ietf.org> >To: IETF-Announce <ietf-announce@ietf.org> >Date: Wed, 03 Aug 2005 10:13:54 -0400 >Subject: Protocol Action: 'Datagram Congestion Control Protocol (DCCP)' to >Proposed Standard > >The IESG has approved the following document: > >- 'Datagram Congestion Control Protocol (DCCP) ' > <draft-ietf-dccp-spec-11.txt> as a Proposed Standard > >This document is the product of the Datagram Congestion Control Protocol >Working Group. > >The IESG contact persons are Allison Mankin and Jon Peterson. > >A URL of this Internet-Draft is: >http://www.ietf.org/internet-drafts/draft-ietf-dccp-spec-11.txt > >*  Technical Summary > >The Datagram Congestion Control Protocol (DCCP) is a transport >protocol that provides bidirectional unicast connections of >congestion-controlled unreliable datagrams. DCCP is suitable for >applications that transfer fairly large amounts of data, but can >benefit from control over the tradeoff between timeliness and >reliability. TCP is not well-suited for these applications, since >reliable in-order delivery and congestion control can cause >arbitrarily long delays. UDP avoids long delays, but UDP applications >that implement congestion control must do so on their own. DCCP >provides built-in congestion control, including ECN support, for >unreliable datagram flows, avoiding the arbitrary delays associated >with TCP. It also implements mechanisms for reporting loss, reliable >connection setup, teardown, and feature negotiation. The congestion >control mechanisms are defined in Congestion Control Profile >documents, known as CCIDs. > >    *  Working Group Summary > >There is a strong working group consensus to develop this protocol. >The applicability of DCCP to interactive real-time multimedia flows has >been somewhat controversial in the working group. The DCCP protocol >specification has been developed with just two initial congestion control >profiles, companions to this publication, draft-ietf-dccp-ccid2, and >draft-ietf-dccp-ccid3. However, the modular nature of the protocol >enables the core specification to be completed while work proceeds >on congestion control profiles for interactive real-time applications. >There is clear and strong support for applying DCCP to non-realtime >streaming and growing interest in other applications as well. > > >    *  Protocol Quality > >DCCP has received extensive transport and cross-disciplinary review. >Written "expert reviews" were conducted by Eric Rescorla (a security >expert), Magnus Westerlund (a multimedia expert and AVT wg chair), and >Greg Minshall (a TCP expert), generating many detailed comments and >substantive improvements in the protocol. The expert review was >followed by a working group "design review" at IETF-57 where the >working group and invited experts -- Magnus Westerlund (multimedia), >Steve Bellovin (security), and Rob Austein (architecture) -- walked >through the spec in detail resulting in additional comments and >substantive changes. Additionally, formal modeling was performed >showing that DCCP is deadlock-free. The protocol is as mature as is >possible without significant implementation experience. The three >known implementations were started early in the life of the >specification and one (from ICIR) resulted in some relatively major >changes to the spec. Recently, it has become known that Kame FreeBSD >contains an implementation of DCCP, albeit not matching the final >version of the spec. It is expected that feedback from implementors >and users will result in further improvements and revisions. > >The IESG review of the specification was done by Allison Mankin. >The WG Chair shepherd was Aaron Falk. > > >_______________________________________________ >IETF-Announce mailing list >IETF-Announce@ietf.org >https://www1.ietf.org/mailman/listinfo/ietf-announce
- Re: Fwd: Protocol Action: 'Datagram Congestion Co… Dong Ligang
- Re: Fwd: Protocol Action: 'Datagram Congestion Co… Dong Ligang
- Re: Fwd: Protocol Action: 'Datagram Congestion Co… Khosravi, Hormuzd M
- Fwd: Protocol Action: 'Datagram Congestion Contro… Joel M. Halpern