Peak Load-Based Congestion Control Scheme in Optical Burst Switching Networks

LaeYoung KIM  SuKyoung LEE  JooSeok SONG  

IEICE TRANSACTIONS on Communications   Vol.E89-B    No.4    pp.1166-1169
Publication Date: 2006/04/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.4.1166
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Internet Technology VI)
OBS,  contention avoidance,  peak load,  congestion control,  

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The most important design goal in Optical Burst Switching (OBS) networks is to reduce burst loss resulting from resource contention. Especially, the higher the congestion degree in the network is, the higher the burst loss rate becomes. The burst loss performance can be improved by employing a judicious congestion control. In this paper, to actively avoid contentions, we propose a peak load-based congestion control scheme that operates based on the highest (called peak load) of the loads of all links over the path between each pair of ingress and egress nodes in an OBS network. Simulation results show that the proposed scheme reduces the burst loss rate significantly, compared to existing OBS protocols, while maintaining reasonable throughput and fairness.