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.

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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

Abstract

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

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.