基于RSSI的无线传感器网络ARQ差错控制策略

J4 ›› 2011, Vol. 46 ›› Issue (9): 61-66.

• CTCIS 2011 会议 • 上一篇下一篇

基于RSSI的无线传感器网络ARQ差错控制策略

姚武军¹,丁谊¹,魏立线¹,杨晓元^1,2

1.武警工程学院电子技术系网络与信息安全武警部队重点实验室, 陕西西安 710086;
2.西安电子科技大学网络信息安全教育部重点实验室, 陕西西安 710071

收稿日期:2011-06-16 出版日期:2011-09-20 发布日期:2011-09-08
作者简介:姚武军(1986- ),男,硕士,主要研究方向为无线传感器网络. Email:sensornet@163.com
基金资助:
国家自然科学基金项目(60633020);陕西省自然科学基金项目(2010JM8034);武警工程学院基础研究基金项目(WJY201027,WJY201023)。

An ARQ error control scheme based on RSSI in wireless sensor networks

YAO Wu-jun¹, DING Yi¹,WEI Li-xian¹, YANG Xiao-yuan^1,2

1. Key Laboratory of Network ＆ Information Security under the Chinese Armed Police Force, Electronic Department,
Engineering College of the Armed Police Force, Xi’an 710086,Shaanxi, China; 2. Key Laboratory of Network ＆
Information Security of the Ministry of Education, Xidian University, Xi’an 710071, Shaanxi, China

Received:2011-06-16 Online:2011-09-20 Published:2011-09-08

摘要/Abstract

摘要：

无线传感器网络(wireless sensor networks,WSN)中采用前向纠错差错控制策略(FEC)无法克服丢包的问题,且在传输长数据时能效较低;传统的自动重发请求差错控制策略(ARQ)主要考虑的指标是带宽延迟乘积,能量效率不是其重要的性能指标。本文提出了一种基于接收信号强度(received signal strength indicator, RSSI)动态调整重传次数和重传时隙的ARQ差错控制策略。发送节点在接收数据请求时从数据请求帧中提取当前信道的RSSI值,当RSSI值大于阈值时采用较小的重传次数和重传时隙,当RSSI值小于阈值时增大重传次数和随机选择一个大的重传时隙,从而避免发送节点陷于忙等,提高了接收节点正确接收数据包的概率。实验结果表明,该方案能有效降低丢包率,且具有较高的能量效率。

关键词: 无线传感器网络;差错控制;自动重发请求;前向纠错;接收信号强度

Abstract:

In wireless sensor networks(WSN), FEC error control strategy cannot overcome the problem of package loss,and it is also low in energy effiency when transmitting long data. The main indicator of the traditional ARQ error control strategy is bandwidth-delay product, rather than the energy efficiency. An ARQ error control strategy is presented based on the received signal strength indicator(RSSI) in this paper, which adjusts the maxRetries and retryDelay of ARQ dynamicly. The sender extracts the present channel RSSI value from data request frame when the data request is accepted. If the RSSI value is overhead the threshold,it adopts small maxRetries and retryDelay, else, it increases the maxRetries and selects a larger retryDelay randomly. Therefore, it can avoid the sender getting into busy waiting and enhance the probability of correctly received package of the receiver. Experimental results show that the proposed scheme can decrease the package loss probability effectively and is better in energy efficiency.

Key words: wireless sensor networks; error control; ARQ; FEC; RSSI

姚武军1,丁谊1,魏立线1,杨晓元1,2. 基于RSSI的无线传感器网络ARQ差错控制策略[J]. J4, 2011, 46(9): 61-66.

YAO Wu-jun1, DING Yi1,WEI Li-xian1, YANG Xiao-yuan1,2. An ARQ error control scheme based on RSSI in wireless sensor networks[J]. J4, 2011, 46(9): 61-66.

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基于RSSI的无线传感器网络ARQ差错控制策略

An ARQ error control scheme based on RSSI in wireless sensor networks

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