基于模糊控制的ad hoc网络TCP算法研究

计算机工程与应用 ›› 2008, Vol. 44 ›› Issue (18): 124-126.

基于模糊控制的ad hoc网络TCP算法研究

李丽君¹,刘鸿飞^2,3,张仔兵³,杨祖元²

1.重庆工学院数理学院，重庆 400050
2.重庆大学自动化学院，重庆 400044
3.重庆通信学院，重庆 400035

收稿日期:2007-09-25 修回日期:2007-11-30 出版日期:2008-06-21 发布日期:2008-06-21
通讯作者: 李丽君

Research of improving TCP algorithm based on fuzzy control in mobile ad hoc networks

LI Li-jun¹,LIU Hong-fei^2,3,ZHANG Zi-bing³,YANG Zu-yuan²

1.School of Mathematics and Sciences，Chongqing Institute of Technology，Chongqing 400050，China
2.College of Automation，Chongqing University，Chongqing 400044，China
3.Chongqing Communication College，Chongqing 400035，China

Received:2007-09-25 Revised:2007-11-30 Online:2008-06-21 Published:2008-06-21
Contact: LI Li-jun

摘要/Abstract

摘要： TCP协议是针对固定可靠网络设计的一种传输协议，它把数据包丢失或延迟的原因都归结为网络拥塞。在移动自组网上直接应用TCP 协议，网络性能会因比特出错率高等原因大幅下降。针对无线自组织网络高误码的基本特征，基于TCP Vegas协议和环回时间的均值和方差改变趋势，采用不同的控制策略调节发送端的数据发送速率，从而优化传输控制协议的吞吐量，提高网络资源的利用率。仿真研究结果表明，与传统的传输控制协议相比，该算法具有更高的吞吐量和稳定的拥塞控制窗口。

Abstract: TCP is a transport protocol formally designed for the wired network and it is known to suffer from performance degradation in mobile wireless environment.In this paper，the authors propose modifications to the congestion avoidance mechanism of the TCP Vegas to overcome these limitations.The solution is depended on average and variance of round trip time，TCP data sender may utilize different congestion avoidance algorithms to optimize congestion window size，aims is to improve ad hoc network throughput.Simulation results show the algorithm is able to overcome several of the identified problems-it can obtain more throughput than TCP Reno and TCP Vegas.

李丽君¹,刘鸿飞^2,3,张仔兵³,杨祖元². 基于模糊控制的ad hoc网络TCP算法研究[J]. 计算机工程与应用, 2008, 44(18): 124-126.

LI Li-jun¹,LIU Hong-fei^2,3,ZHANG Zi-bing³,YANG Zu-yuan². Research of improving TCP algorithm based on fuzzy control in mobile ad hoc networks[J]. Computer Engineering and Applications, 2008, 44(18): 124-126.