摘要
无线传感网络已大量应用于社会各个领域,节点自定位问题是无线传感网络中的关键技术之一。基于RSSI(Re-ceived Signal Strength Indicator)的定位技术利用已知发射信号的强度,接收节点根据收到的信号强度RSSI计算信号在传播过程中的损耗,根据理论或经验的信号传播模型将传播损耗转化为距离,由于其对硬件要求低,是现阶段研究的热点。为解决RSSI测量方法定位误差较大的问题,提出通过校正RSSI测距技术测量的节点间点到点的距离,并选择距离误差较小的锚节点,仿真结果表明本算法比传统的RSSI定位算法拥有更好的定位性能。
Wireless sensor networks have been widely applied to all areas of society. Node location is one of the key technologies in wireless sensor network. Using the strength of known emission signal, the receiver node calculates the loss in the dissemination process according to signal strength RSSI received, then transfem the loss to distance according to the theory or experience signal propagation model. RSSI-based location is a hot spot in nowadays because of its low hardware requirements. For resolving biggish error in RSSI-based location, the paper presents a new method of location using collation of RSSI （ Received Signal Strength Indicator） for range measurement between nodes and choose some beacon nodes which can give smaller distance error in sensor network. Simulation results show that this algorithm has a better performance than classical RSSI algorithm.
出处
《计算机与现代化》
2010年第2期19-21,共3页
Computer and Modernization
关键词
无线传感器网络
定位算法
测距
wireless sensor network
location algorithm
range
