一种基于分组丢失率测量的差错容忍式拥塞控制算法

doi:10.11959/j.issn.1000-0801.2015257

电信科学 ›› 2015, Vol. 31 ›› Issue (11): 43-47.doi: 10.11959/j.issn.1000-0801.2015257

一种基于分组丢失率测量的差错容忍式拥塞控制算法

严军荣¹,卢玉龙¹,潘鹏^1,²

¹ 杭州电子科技大学通信工程学院杭州 310018
² 南京邮电大学通信与信息工程学院南京 210003

出版日期:2015-11-20 发布日期:2015-12-14
基金资助:
浙江省自然科学基金青年基金资助项目;第56批中国博士后科学基金面上基金资助项目;国家自然科学基金青年科学基金资助项目

An Error Tolerated Congestion Control Algorithm Based on Packet Loss Rate Measurement in Deep Space Communication Network

Junrong Yan¹,Yulong Lu¹,Peng Pan^1,²

¹ School of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China
² College of Telecommunications ＆ Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

Online:2015-11-20 Published:2015-12-14
Supported by:
Zhejiang Provincial Natural Science Foundation of Youth Fund Project;56th China Postdoctoral Science Foundation-Funded Projects;The National Natural Science Foundation of Youth Science Foundation

摘要/Abstract

摘要：

空间通信的TCP大多数是基于Vegas算法，该算法需要对往返时延进行较为精确的测量，这在具有极长且可变时延的信道特征的深空通信环境中很难实现。提出一种基于分组丢失率测量的差错容忍式拥塞控制算法，该算法采用数据块的形式发送数据，依据历史数据设定差错容忍度，利用分组丢失率测量值进行拥塞状态判断及发送窗口大小调整，从而使用较小的开销达到较高的传输效率。最后，利用数学建模方法，证明基于分组丢失率测量的差错容忍式拥塞控制算法的吞吐量比传统TCP的Tahoe算法提高34%，比Reno算法提高22%。

关键词: 拥塞控制, 数据块, 分组丢失率, 差错容忍

Abstract:

Congestion control algorithms of TCP protocol previously used in space communications are mostly based on TCP Vegas algorithm.They always require accurately measurement of RTT,but it's very difficult to achieve in deep space communication networks which have very long and variable delay channel characteristics.An errors tolerated congestion control algorithm is proposed based on packet loss rate measurement.The algorithm sends data in the form of data blocks and gives an errors tolerated degree based on the history data.It measures the congestion state based on the current packet loss rate measurement,so it can achieve a smaller overhead and higher transmission efficiency.In addition,the usage of mathematical modeling methods simplifies the networks and simulates the real network traffic.The mentioned algorithm is compared with the classical congestion control algorithm.Analysis and simulation prove that thethroughput of improved algorithm is 34 percent better than Tahoe and 22 percent better than Reno,so it gets a better performance.

Key words: congestion control, data block, packet loss rate, error tolerated

严军荣,卢玉龙,潘鹏. 一种基于分组丢失率测量的差错容忍式拥塞控制算法[J]. 电信科学, 2015, 31(11): 43-47.

Junrong Yan,Yulong Lu,Peng Pan. An Error Tolerated Congestion Control Algorithm Based on Packet Loss Rate Measurement in Deep Space Communication Network[J]. Telecommunications Science, 2015, 31(11): 43-47.

图/表 5

参考文献 13

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一种基于分组丢失率测量的差错容忍式拥塞控制算法

An Error Tolerated Congestion Control Algorithm Based on Packet Loss Rate Measurement in Deep Space Communication Network

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