摘要
针对TCP Vegas在GEO卫星网络中应用时难以准确估计BaseRTT而带来的不足,结合TCP Vegas-A和TCP New Veno算法的优势,提出了一种改进算法TCP Vegas-A+。改进算法在TCP Vegas-A算法的基础上,引入基于相对队列时延的拥塞状态判断方法,对网络状态进一步细分,以准确判断网络拥塞状态,合理调整拥塞窗口。仿真结果表明,改进算法具有较好的吞吐量性能,并提高了与Reno竞争带宽的能力,能较好地适用于GEO卫星链路。
In order to solve the problems existing at the application of TCP Vegas in GEO satellite network, based on TCP Vegas-A algorithm, combining the advantages of TCP New Veno algorithm, an improved algorithm termed TCP Vegas-A＋ was proposed. TCP Vegas-A＋ adds the monitoring algorithm of the network state for classifying the network state into congestion increase and congestion decrease. When the network state is in congestion decrease, TCP Vegas-A＋ increases the congestion window in a more radical way, otherwise increases the congestion window in a less radical way. Simulation results show that the improved algorithm has higher throughput and better bandwidth capacity competition with the Reno than the existing TCP Vegas improved algorithms, and can be well applied to GEO satellite network environment.
出处
《计算机科学》
CSCD
北大核心
2008年第11期70-73,共4页
Computer Science
基金
军队科研基金资助项目(KJZ06618)
