An enhanced Vegas congestion control algorithm based on BeiDou navigation system

摘要

In space communication environment, Vegas congestion control algorithm provides better performance than TCP Reno algorithm. Thus Vegas algorithm is usually used in satellite communication networks, which have long delay, high Bit Error Rate (BER) and so on. However, existing Vegas algorithm does not provide satisfactory performance in slow start stage or congestion avoidance stage in space communication environment. In this paper, an enhanced Vegas congestion control algorithm has been suggested to overcome such problems. Then, simulation of the traditional Vegas algorithm and the enhanced Vegas algorithm has been dealt with in geostationary orbit satellite model and BeiDou navigation system model using Network Simulation 2 (NS2) software. The simulation results show that, the enhanced Vegas congestion control algorithm can achieve significant performance improvement.