北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2010, Vol. 33 ›› Issue (1): 27-32.doi: 10.13190/jbupt.201001.27.liaoy

• 论文 • 上一篇    下一篇

无线Mesh网络下的网络编码机制

廖勇;杨士中   

  1. (重庆大学 通信与测控中心, 重庆 400044)
  • 收稿日期:2009-05-15 修回日期:2009-09-11 出版日期:2010-02-28 发布日期:2010-02-28
  • 通讯作者: 廖勇

A Network Coding Scheme in Wireless Mesh Networks

LIAO Yong;YANG Shi-zhong   

  1. (Center of Communication and Tracking Telemetering Command, Chongqing University, Chongqing 400044,China)
  • Received:2009-05-15 Revised:2009-09-11 Online:2010-02-28 Published:2010-02-28
  • Contact: LIAO Yong

摘要:

提出了一种无线网状环境下基于接收节点速率匹配的传输控制协议(TCP)网络编码机制,通过网状连接层(MCL)构建编码层对传输控制协议数据(TCP-DATA)和传输控制协议应答(TCP-ACK)进行网络编码,采用修改的分布式协调功能请求发送/清除发送(DCF RTS/CTS)机制在接收节点确定数据传输速率. 实际搭建了1个3跳的无线Mesh线性网络,对基于接收节点速率匹配的TCP网络编码数据进行捕获分析,得出其端到端系统的TCP吞吐量与没有采用网络编码相比提高了约20%.

关键词: 接收节点速率匹配, 传输层, 网络编码, 无线网络

Abstract:

A wireless mesh transport control protocol (TCP) network coding scheme based on rate-matching receiver is proposed. A network coding(NC) layer to code transport control protocol data(TCP-DATA) and transport control protocol ack(TCP-ACK) on mesh connectivity layer (MCL) is constructed, and modified distribution coordination function request to send/clear to send (DCF RTS/CTS) mechanism to match data rate in the receiver is adopted. Actually a real 3 hops wireless mesh linear network has been constructed, capturing the TCP network coding data based on the proposed scheme, therefore, it is concluded that the TCP throughput of the end-to-end system is approximately 20% higher than non
-NC scheme.

Key words: rate-matching receiver, transport control protocols, network coding, wireless networks

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