基于链路质量的WSN跨层功率控制研究  

Research of Forestry Monitor Wireless Sensor Networks Cross-layer Power Control Based on Link Quality

作　　者：王健[1] 杨柳松[1] 赵亚凤[1] 

机构地区：[1]东北林业大学,黑龙江哈尔滨150040

出　　处：《无线电通信技术》2010年第5期11-13,共3页Radio Communications Technology

基　　金：国家"863"项目(2006AA10Z244);哈尔滨市科技攻关项目(2009AA1CG018);哈尔滨市科技局科技创新人才研究专项资金(RC2008QN002013)

摘　　要：设计了基于森林监测的传感网功能结构和基于ZigBee/802.15.4标准的森林监测传感网体系结构。根据森林监测的特点,设计了基于CC2520和低功耗的MSP430F5437处理器的节点以及结合ARM处理器和协调器的控制节点,从物理层上实现了能量控制。利用基于ZigBee/802.15.4标准无线传感器网络节点,对无线电传播路径损耗模型以及CC2520的分析,用分段线性逼近的方法得到发送功率与RSSI、LQI及节点间距离的关系。通过进一步优化得到发送功率与片码错误率、节点间距离的关系,建立了一种适合在通信开销小、硬件要求低的场合下使用的基于节点间距离、接收信号强度指示和链路质量指示的跨层功率控制算法。The function and structure of sensor network for forest monitoring and its architecture based on ZigBee/802.15.4 standards are designed in this paper.According to the features of forest monitoring,design of sensor nodes based on CC2520 and low power consumption chip MSP430F5437 are also presented.With ARM processor and coordinator,analysis of energy control in physical layer.With WSN nodes based on ZigBee/802.15.4 standards,radio propagation path loss model and CC2520 are analyzed.And with Piecewise linear approximation method,the relationship between transmission power,RSSI,LQI and the distance of the nodes is studied.And the relationship between transmission power,error rate and the distance of the nodes by further optimization is also discussed.It establishes a cross-layer energy optimization algorithm for the situation of less communication overhead and lower hardware demand.The algorithm is based on the distance of nodes,RSSI and LQI.

关 键 词：链路质量 跨层 片码错误率 RSSI 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]