计算机与现代化

• 网络与通信 • 上一篇    下一篇

基于线性网络编码的无线网络信道接入机制

  

  1. (1.河南工业职业技术学院网络中心,河南南阳473000;2.河南工业职业技术学院计算机工程系,河南南阳473000)
  • 收稿日期:2015-02-05 出版日期:2015-06-16 发布日期:2015-06-18
  • 作者简介:任晓娜(1981-),女,河南南阳人,河南工业职业技术学院网络中心讲师,本科,研究方向:计算机应用; 裴祥(1984-),男,重庆人,河南工业职业技术学院计算机工程系助教,硕士,研究方向:计算机网络与软件技术。
  • 基金资助:
    河南省科技攻关项目(132102210520)

Wireless Network Channel Access Mechanism Based on Linear Network Coding

  1. (1. Network Center, Henan Polytechnic Institute, Nanyang 473000, China; 2. Department of Computer Engineering, Henan Polytechnic Institute, Nanyang 473000, China)
  • Received:2015-02-05 Online:2015-06-16 Published:2015-06-18

摘要: 为了提高无线自组织网络的通信性能,针对当前网络信道接入机制存在的不足,提出一种基于线性网络编码的信道接入机制(LNC)。首先对传统网络信道接入机制的工作原理和缺陷进行分析,然后采用线性网络编码方式提高数据包传输效率,最后运用马尔科夫链模型对LNC进行数学建模,并通过仿真实验对其性能进行分析。仿真实验结果表明,相对于传统网络信道接入机制,LNC不仅提高了网络的吞吐量,降低了节点的数据包丢失率,而且提高了信道利用率。

关键词: 无线网络, 信道接入机制, 线性网络编码, 马尔科夫链

Abstract: In order to improve the communication performance of the wireless selforganized network, aiming at the deficiency of current network channel access mechanism, this paper puts forward a channel access mechanism based on linear network coding (LNC). The working principle and the defects of traditional network channel access mechanism are analyzed, and then the linear network coding method is used to improve data packet transmission efficiency, finally Markov chain model is used to construct the mathematical model of LNC, and the performance is tested by simulation experiment. The simulation results show that compared with the traditional network channel access mechanism, LNC not only improves the network throughput and reduces the nodes packet loss rate, but also increases the channel utilization rate.

Key words: wireless network, channel access mechanism, linear network coding, Marko chain

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