Computer Science ›› 2017, Vol. 44 ›› Issue (Z11): 302-307.doi: 10.11896/j.issn.1002-137X.2017.11A.064

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Improved Vegas Algorithm over LEO Satellite Network

WEI De-bin, TAO Shun-li, SHI Huai-feng and LIAO De-lin   

  • Online:2018-12-01 Published:2018-12-01

Abstract: Aimming at throughput degradation caused by the Vegas algorithm of SCPS-TP (Space Communications Protocol Standards Transport Protocol) in LEO (Low Earth Orbit) satellite network,an adaptive congestion control algorithm named Vegas-AD (Adaptive) was proposed.The algorithm based on the analysis of the Vegas improves calculation method of RTT(Round-Trip Time) so that it can adjust the congestion window more accurately,and optimizes the growth strategy congestion window,which can improve the bandwidth competitiveness of the congestion avoidance phase.At the same time,an factor which can adaptively adjust value of the congestion window is put forward according to the degree of network congestion.The results show that the bandwidth competitiveness of Vegas-AD algorithm is significantly higher than that of Vegas,and the new algorithm can improve the network throughput greatly.

Key words: SCPS-TP,Satellite network,Congestion control,Vegas

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