改进TCP-Illinois算法在无线网络中的应用
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摘要
TCP-Illinois拥塞控制算法适用于有线高速网络,应用于无线网络时容易受噪声干扰导致数据丢包现象比较严重。为此,提出一种改进的拥塞控制算法TCP-NewIllinois,通过瓶颈队列的积压程度判定拥塞丢包,在拥塞发生时利用带宽估计值调整拥塞窗口和慢启动阈值,提高无线网络带宽利用率。NS3平台上的仿真结果表明,与TCP-Illinois算法相比,TCP-NewIllinois算法具有更高的无线网络吞吐量及传输效率。
TCP-Illinois is a congestion control algorithm for wired high-speed network.When applied to wireless networks,there is a serious problem of random packet loss caused by noise interference.Therefore,an improved congestion control algorithm TCP-NewIllinois is proposed.The packet loss is determined by the backlog of bottleneck queues.When congestion occurs,the congestion window and slow start threshold are adjusted by bandwidth estimation to improve the bandwidth utilization of wireless network.Simulation results on NS3 platform show that compared with TCP-Illinois algorithm,TCP-NewIllinois algorithm has higher wireless network throughput and transmission efficiency.
TCP-Illinois is a congestion control algorithm for wired high-speed network.When applied to wireless networks,there is a serious problem of random packet loss caused by noise interference.Therefore,an improved congestion control algorithm TCP-NewIllinois is proposed.The packet loss is determined by the backlog of bottleneck queues.When congestion occurs,the congestion window and slow start threshold are adjusted by bandwidth estimation to improve the bandwidth utilization of wireless network.Simulation results on NS3 platform show that compared with TCP-Illinois algorithm,TCP-NewIllinois algorithm has higher wireless network throughput and transmission efficiency.
引文
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[2] YANG Y R,LAM S S.General AIMD congestion control[C]//Proceedings of International Conference on Network Protocols.Washington D.C.,USA:IEEE Press,2000:187-198.
[3] 李牧,张勇丁,向东蕾,等.无线网络环境中传输控制协议的改进机制[J].计算机工程,2016,42(1):103-108.
[4] LIU S,BA A R T,SRIKANT R.TCP-Illinois:A loss-and delay-based congestion control algorithm for high-speed networks[C]//Proceedings of the 1st International Conference on Performance Evaluation Methodolgies and Tools.New York,USA:ACM Press,2006:55-58.
[5] SON J,LEE S.Improved wireless TCP by discriminative control using loss cause reasoning[C]//Proceedings of International Conference on Information Networking.Berlin,Germany:Springer,2006:670-679.
[6] FLEYD S,MAHDAVI J,MATHIS M,et al.An extension to the Selective Acknowledgement(SACK) option for TCP[EB/OL].[2018-01-07].https://tools.ietf.org/html/rfc2018.
[7] 金崇奎,王嘉,宋利.一种基于TCPW的流媒体端到端拥塞控制方法[J].中国图象图形学报,2008,13(10):1959-1962.
[8] 兰红梅.基于生物数学模型的拥塞控制机制[D].成都:电子科技大学,2011.
[9] PADHYE J,FIROIU V,TOWSLEY D F,et al.Modeling TCP Reno performance:a simple model and its empirical validation[J].IEEE/ACM Transactions on Networking,2000,8(2):133-145.
[10] 江先亮.面向网络加速的传输控制优化若干关键技术研究[D].杭州:浙江大学,2016.
[11] SINHA P.WTCP:a reliable transport protocol for wireless widearea networks[J].Wireless Networks,2002,8(2):301-316.
[12] CHENG P F,LIEW S C.TCP Veno:TCP enhancement for transmission over wireless access networks[J].IEEE Journal on Selected Areas in Communications,2003,21(2):216-228.
[13] XU K,TIAN Y,ANSARI N.TCP-jersey for wireless IP communications[J].IEEE Journal on Selected Areas in Communications,2004,22(4):747-756.
[14] 茹新宇,刘渊,陈伟.新网络仿真器NS3的研究综述[J].微型机与应用,2017,36(20):14-16.
[15] 张江贵.井下Mesh救灾网络语音通信子系统设计与实现[D].北京:北京交通大学,2014.
[16] 崔翠梅,杨德智,姜程鑫.基于NS3的移动认知网络仿真系统[J].通信技术,2016,49(11):1509-1513.