Ad hoc网络中基于带宽延迟估计的TCP拥塞控制  

TCP Congestion Control Using Bandwidth and Delay Estimation Under Ad Hoc Network

作　　者：葛卫民[1] 赵冬雪[1] 邱胜男[1] 罗咏梅[1] 

机构地区：[1]天津大学计算机科学与技术学院,天津300072

出　　处：《天津大学学报》2010年第10期866-872,共7页Journal of Tianjin University(Science and Technology)

基　　金：国家自然科学基金资助项目(60472078);天津市自然科学重点基金资助项目(07JCZDJC06500);天津市软件产业发展专项基金资助项目

摘　　要：借助跨层交互机制,提出了一种利用MAC层估计的可用带宽和数据包的往返延迟调整源端发送速率的TCP改进方案.静态场景和动态场景的仿真结果表明,该方法可以减少TCP的平均慢启动次数,吞吐率比传统的TCP显著提高.改进后的TCP增强了对Ad hoc网络环境的适应性,从而提高了网络的性能.stract： With the help of the cross-layer interactive mechanism, a scheme for improvement was proposed. In the scheme, first the bandwidth and delay in MAC layer were measured and passed back to the sending end, Then transport layer of sending end modified its sending rate according to the received information. Simulation results in bath static and dynamic scenarios show that the method decreases the slow-start times largely and imcrease the TCP throughput a lot. The improved TCP is more adaptable to the environment ofAd hoc network, which in turn improves the function of network.

关 键 词：无线ADHOC网络 传输控制协议 跨层 可用带宽 延迟 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]