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计算机工程 ›› 2011, Vol. 37 ›› Issue (21): 64-67. doi: 10.3969/j.issn.1000-3428.2011.21.022

• 网络与通信 • 上一篇    下一篇

基于LQI的WSN自适应差错控制方案

魏立线1a,1b,姚武军1a,钟卫东1a,1b,杨晓元1a,2   

  1. (1. 武警工程学院 a. 电子技术系网络与信息安全武警部队重点实验室;b. 网络与信息安全研究所,西安 710086; 2. 西安电子科技大学网络信息安全教育部重点实验室,西安 710071)
  • 收稿日期:2011-04-19 出版日期:2011-11-05 发布日期:2011-11-05
  • 作者简介:魏立线(1966-),男,副教授、硕士,主研方向:无线传感器网络,网络安全;姚武军,硕士;钟卫东,副教授;杨晓元,教授
  • 基金资助:
    国家自然科学基金资助项目(60842006);陕西省自然科学基金资助项目(2010JM8034)

Adaptive Error Control Scheme in WSN Based on Link Quality Indicator

WEI Li-xian 1a,1b, YAO Wu-jun 1a, ZHONG Wei-dong 1a,1b, YANG Xiao-yuan 1a,2   

  1. (1a. Key Laboratory of Network & Information Security Under the Chinese Armed Police Force, Department of Electronic Technology; 1b. Network & Information Security Institute, Engineering College of the Armed Police Force, Xi’an 710086, China; 2. Key Laboratory of Network & Information Security of the Ministry of Education, Xidian University, Xi’an 710071, China)
  • Received:2011-04-19 Online:2011-11-05 Published:2011-11-05

摘要: 针对无线传感器网络(WSN)中信息传输误码率高和能量受限的问题,提出一种基于链路质量指示(LQI)的自适应差错控制方案。利用IEEE802.15.4协议的物理层规范为无线传感器网络提供精确的信道质量评估,根据LQI与误包率之间的数量关系,将信道质量非均匀地划分为8个等级,并选择8种BCH码与之对应,在节点通信过程中实时地选择最佳的BCH码作为纠错码。实验结果表明,该方案具有较高的能量效率,能够有效降低误包率。

关键词: 无线传感器网络, 差错控制, 链路质量指示, IEEE802.15.4协议, BCH码

Abstract: Aiming at the characteristics of high bit error rate and energy constraints on Wireless Sensor Network(WSN), this paper proposes an adaptive error control scheme based on Link Quality Indicator(LQI). The PHY specification of IEEE802.15.4 provides accurate measurements of channel quality for WSN, according to the quantitative relationship between LQI and packet error rate, it divides the channel quality into eight levels non-uniformly, furthermore, eight different BCH codes are chosen correspondingly. The motes choose optimal BCH codes as their error correction scheme in real time. Experimental results show the scheme has high energy efficiency, meanwhile, drops the packet error rate effectively.

Key words: Wireless Sensor Network(WSN), error control, Link Quality Indicator(LQI), IEEE802.15.4 protocol, BCH code

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