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Homeostatic Congestion Control

Luiz Claudio Schara MagalhãesMarcos V. S. MonteiroRicardo C. Carrano

This paper contains the description and evaluation of the congestioncontrol algorithm for rate-based protocols called Homeostatic CongestionControl (HCC). The name homeostatic comes from the use of two mechanismswith opposing bias to achieve a dynamic equilibrium. HCC uses timinginformation to infer congestion. Packet pairs are sent periodically to probe thenetwork, which may overestimate the available bandwidth. HCC alsomeasures available bandwidth measuring the variation of the arrival time(jitter) of packets in the sequence of evenly spaced packets given by the ratebasedapproach. The error in the current rate measured by the jitter is fedback into the control loop. The rate is then balanced between a probingmechanism that raises the rate, and an error feedback, which lowers it. HCCis evaluated not only on its ability to avoid congestion, but also on itsconvergence to available bandwidth, its stability by itself and in the face ofcompeting traffic, and its fairness.

http://www.lbd.dcc.ufmg.br/colecoes/sbrc/2010/0028.pdf

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