基于往返时间最佳预测的无线TCP性能改进  

Improving Wireless TCP Performance Based on RTT Predictable Approach

作　　者：刘俊[1] 

机构地区：[1]深圳信息职业技术学院电子与通信学院,广东深圳518172

出　　处：《深圳信息职业技术学院学报》2012年第3期9-14,共6页Journal of Shenzhen Institute of Information Technology

摘　　要：TCP针对所有的丢包均启动拥塞控制机制,导致在无线网络中端到端性能恶化,网络资源利用率低。在研究分析TCP拥塞窗口调整机制的基础上,提出一种基于往返时间最佳预测的发送速率调整机制。根据对往返时间的预测,构建网络拥塞状态的判断机制,进而实现发送速率的自适应调整,充分利用网络资源。数学分析说明了新算法的可行性,并通过NS仿真对其性能进行评估。仿真结果表明该改进的TCP算法的公平性与有效性。TCP responds to all losses by invoking congestion control algorithm, resulting in degraded end-to-end performance in wireless network. TCP congestion control algorithm was researched and an improved algorithm based on predictable RTT is proposed. According to predictable RTT, one new algorithm is established and adaptive CWND control is implemented. Mathematical analysis shows the feasibility of the new algorithm, Its performance was evaluated by NS simulation. The simulation results show the effectiveness and fairness of the algorithm.

关 键 词：传输控制协议 网络拥塞 拥塞控制 拥塞窗口 无线网络 往返时间 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]