无线传感器网络链路通信质量测量研究

首先分析了传统链路测量方法所存在的问题,提出了均值RSSI(接收信号强度显示)、均值LQI(链路质量显示)测量法,通过测量及计算RSSI、LQI的均值,可以较为准确地获得链路通信质量信息;其次构建了发送功率改变、硬件校准改变、周围环境改变和并发干扰等实验案例,分析了均值RSSI、均值LQI在上述案例下的测量性能,定义了链路测量灵敏度,计算了均值RSSI、均值LQI的灵敏度值,对RSSI及LQI用于链路通信质量测量和性能评估做出了全面的权衡。

Study on measurement of link communication quality in wireless sensor networks

Firstly,the measurement based on mean RSSI and LQI was suggested by analyzing the disadvantages of tradi-tional link measurement,and the more accurate information of link communication quality can be gained by measuring and computing the mean RSSI and LQI,secondly,different experiments with changed transmission power,hardware calibration,dynamic environments and concurrence interference had been tried to analyze the performance of the meas-urement based on the mean RSSI and LQI,at last,the sensitivity of link measurement had been defined,and the sensitiv-ity values of the mean RSSI and LQI were computed,then a comprehensive weight between RSSI and LQI was made for measurement of link communication quality and performance evaluation in WSN.