一种用于异构卫星网络的MPTCP改进策略  

An Enhancement of Multipath TCP for Heterogeneous Satellite Networks

作　　者：许海光 丁良辉[1] 杨峰[1] 钱良[1] XU Hai-guang;DING Liang-hui;YANG feng;QIAN Liang(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学,上海200240

出　　处：《计算机仿真》2020年第7期95-99,共5页Computer Simulation

基　　金：国家自然科学基金(61771309,61671301,61420106008,61521062);上海市重点实验室基金(STCSM15DZ 2270400);数据链技术重点实验室开放基金(CLDL-20162306);上海交通大学医工交叉基金(YG2017QN47)。

摘　　要：异构卫星网络的长往返时延(RTT)、高分组错误率(PER)和路径间的性能不对称制约了多路径TCP(MPTCP)的性能。提出了一种适用于异构卫星网络的改进MPTCP方案(MPTCP-X),主要方案包括三个部分:首先是通过最快的子路径返回ACK以加速发送窗口(CWND)增长;其次是使用确认分组(ACK)的到达时间准确地估计可用带宽以调整传输速率;其三是区分网络拥塞或者链路错误引起的分组丢失以调整CWND。NS2仿真结果表明,MPTCP-X可以有效提高异构卫星网络的端到端数据吞吐量。The imbalance of Round-Trip Time(RTT)among different paths and high Packet Error Rate(PER)of wireless links degrade the performance of MPTCP significantly.This paper proposes an enhanced MPTCP scheme(MPTCP-X)for heterogeneous satellite networks,which includes three parts:(1)faster ACK returns the ACK through the fastest subflow path to accelerate CWND growth;(2)the arrival time of Acknowledgement(ACK)packet is used to accurately estimate available bandwidth to adjust the transmission rate;(3)packet loss caused by network congestion and link errors is differentiated to smartly adjust CWND.The NS2 simulation results show that MPTCP-X can effectively improve data throughput in heterogeneous satellite networks.

关 键 词：多路径传输控制协议 异构卫星网络 传输层协议 吞吐量 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]