适应精度需求变化的无线传感网络覆盖算法

WSN coverage algorithm adaptive to precision requirements

为了解决当前覆盖算法对空间上连续分布的物理量进行监测,产生大量冗余数据需要处理、节点能耗高、监测精度差的问题,抓住监测数据本身空间和时间上连续、非迅速变化的特点,结合流体力学数值分析中的动态嵌套网格技术,获得一种新的基于动态嵌套网格技术的无线传感器网络覆盖算法——DNGCA。仿真结果表明,DNGCA在主要覆盖指标上较其他算法有很大改善。

In practice,many physical parameters are continuous during one period of time.But this intrinsic characteristic is often ignored in conventional algorithm.So,for a node in Wireless Sensor Network（WSN）,the redundant data scale is too large to dispose,the energy efficiency is low,the inspection precision is bad.The defaults of conventional algorithms were mended by DNGCA according to dynamic nested grid technology used in hydrodynamics.The simulation indicates that all principal coverage indexes： coverage extent,node creditability,coverage efficiency,coverage proportion,etc.,are improved radically.