home search a-z help
University of Cambridge Computer Laboratory
Thursday Mar 15th, 2007 - 4.30pm
Computer Laboratory > Research > Systems Research Group > NetOS > Seminars > Thursday Mar 15th, 2007 - 4.30pm

Implicit Congestion Control in Wireless Multihop Networks

Bjorn Scheuermann

Implicit hop-by-hop congestion control is a novel congestion control approach that has been tailored to the specific properties of a wireless multihop medium. It is meanwhile well-known that TCP and TCP-like congestion control are highly problematic in these networks. Our scheme does not use any explicit congestion feedback, and does not maintain any rates or windows. Instead, it establishes backpressure towards the source node implicitly, by passively observing the medium. A lightweight error detection and correctio mechanism allows fast reaction to changing medium conditions.