A New Internet-Draft is available from the on-line Internet-Drafts
directories.
Title : Coupled Multipath-Aware Congestion Control
Author(s) : C. Raiciu, M. Handley, D. Wischik
Filename : draft-raiciu-mptcp-congestion-00.txt
Pages : 10
Date : 2009-10-19
Often endpoints are connected by multiple paths, but communications
are usually restricted to a single path per socket. Resource usage within the network would be more efficient were it possible for these
multiple paths to be used concurrently.
The use of multiple paths simultaneously, specifically within a
Multipath TCP protocol, necessitates the development of new
congestion control algorithms. If existing algorithms such as TCP
New Reno were run independently on each path, the multipath flow
would take more than its fair share if there was a common bottleneck.
Further, it is desirable that a source with multiple paths available
will transfer more traffic using the least congested of the paths,
hence achieving resource pooling. This would increase the overall
utilization 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 aggresiveness 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-raiciu-mptcp-congestion-00.txt
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