TCP端到端等效噪声模型及拥塞控制方法研究  

Equivalent Noise Model and Congestion Control Algorithm of End-to-End TCP Link

作　　者：李世银[1] 王秀娟[1] 钱建生[1] 刘琼[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电子科技大学学报》2009年第4期489-492,500,共5页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金(70533050)

摘　　要：针对传统TCP拥塞控制协议在有线/无线混合网络中存在的问题,采用通信系统加性噪声分析方法和信道容量理论,将端到端链路背景流量等效为加性噪声,建立了链路等效噪声模型。研究了基于等效噪声模型的端到端链路带宽估计方法,并提出了一种基于等效噪声模型的TCP拥塞控制算法(N-TCP)。理论分析和仿真结果表明所提出的带宽估计方法准确有效,新的拥塞控制算法和传统的TCP协议兼容性好,具有良好的抗随机丢失能力和公平性,适宜于存在随机丢失的无线/有线混合网络。Aimming at the problems of traditional transmission control protocol （TCP） congestion control protocol in the wired/wireless heterogeneous networks, an innovative link equivalent noise model is proposed. In this method, the background traffic of TCP link is equivalent to the additive noise. The end-to-end link bandwidth estimation methods are researched based on the equivalent noise model. An improved TCP congestion control algorithm, TCP protocol based on noise model （N-TCP）, is proposed. The results of simulation and theoretical analysis show that the proposed method is valid for bandwidth estimation and therefore suitable for the application since its good compatibility to the traditional TCP protocol and characteristics of fairness for allocating bandwidth and resisting random packet loss.

关 键 词：带宽估计 拥塞控制 噪声模型 TCP 无线网络 

分 类 号：TN915.04[电子电信—通信与信息系统]