A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Multipath TCP Working Group of the IETF.
Title : Coupled Congestion Control for Multipath Transport Protocols
Author(s) : Costin Raiciu
Mark Handley
Damon Wischik
Filename : draft-ietf-mptcp-congestion-07.txt
Pages : 13
Date : 2011-07-29
Often endpoints are connected by multiple paths, but communications
are usually restricted to a single path per connection. Resource
usage within the network would be more efficient were it possible for
these multiple paths to be used concurrently. Multipath TCP is a
proposal to achieve multipath transport in TCP.
New congestion control algorithms are needed for multipath transport
protocols such as Multipath TCP, as single path algorithms have a
series of issues in the multipath context. One of the prominent
problems is that running existing algorithms such as standard TCP
independently on each path would give the multipath flow more than
its fair share at a bottleneck link traversed by more than one of its
subflows. Further, it is desirable that a source with multiple paths
available will transfer more traffic using the least congested of the
paths, achieving a property called resource pooling where a bundle of
links effectively behaves like one shared link with bigger-capacity.
This would increase the overall efficiency of the network and also
its robustness to failure.
This document presents a congestion control algorithm which couples
the congestion control algorithms running on different subflows by
linking their increase functions, and dynamically controls the
overall aggressiveness of the multipath flow. The result is a
practical algorithm that is fair to TCP at bottlenecks while moving
traffic away from congested links.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-mptcp-congestion-07.txt
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
This Internet-Draft can be retrieved at:
ftp://ftp.ietf.org/internet-drafts/draft-ietf-mptcp-congestion-07.txt
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