文章编号：1004－5422(2021)04－0374－05

DOI:10.3969/j.issn.1004-5422.2021.04.007

无线高时延环境下自适应信道带宽的TCP协议传输优化方法

李  璞，潘莉丽，丁  锐

(中国电子科技集团公司第三十研究所，成都  610041)

摘  要：无线通信链路存在高时延、高抖动与高丢包率等特征，导致TCP协议在无线通信网络中的传输效果较差.针对TCP协议在高时延链路上存在的局限性，提出了一种能够实现自适应信道带宽的TCP传输优化方法，该方法利用协议代理的方式，并结合采用ACK欺骗、基于改进的TCP Vegas算法的发送控制、通告窗口调整等多种手段，能够最大程度上适应无线链路的可用信道带宽.仿真结果表明，相比于无线高时延环境下标准TCP传输速率，利用本文提出的方法，TCP协议传输速率得到了有效提升，能够达到可用理论信道带宽的90%以上.

关键词：高时延;带宽自适应;TCP传输优化

中图分类号：TN915.04        文献标识码：A

Channel Bandwidth Adaptive TCP Transmission Optimization Method in Wireless High

 Latency Environment

LI Pu,PAN Lili,DING Rui

(The 30th Research Institute of CETC,Chengdu 610041,China)

Abstract：The wireless communication link has the characteristics of high delay,high jitter,and high packet loss rate,which result in poor transmission effect of the TCP protocol in the wireless communication network.In order to solve this problem,we propose a TCP transmission optimization method,which can realize channel bandwidth adaptive.This method is based on protocol proxy，and uses ACK spoofing,dynamic transmission control based on advanced TCP Vegas algorithm,notification window adjustment,to adapt to the available channel bandwidth of the wireless link to the greatest extent.The simulation results show that,compared with the standard TCP 

transmission rate in the wireless high latency environment,the TCP transmission rate is effectively enhanced by using the method proposed in this paper.The rate can reach more than 90% of the theoretical channel bandwidth.

Key words：high delay;bandwidth adaptive;TCP transmission optimization