【摘要】 讨论了传感器网络节点定位中的位置不确定性问题,引入节点的可行地理区域反映出节点的所有可能位置范围.使用简单的多边形近似不规则的实际可行地理区域,并给出了一种分布式计算方法.仿真结果表明,使用6个顶点的多边形近似可行地理区域,其精度比使用4个顶点提高了约30%.此外,开销较小的分布式算法能最终收敛到集中式算法的计算结果.更多还原

【Abstract】 This paper addresses node position uncertainty in wireless sensor network localization by introducing the feasible geographic region,which clearly represents all feasible position scope of sensor nodes.Simple polygons are used to approximate actual irregular feasible geographic region.A distributed algorithm is also proposed.Simulation results show that the approximation accuracy increases 30%,if the number of vertex polygons increases from 4 to 6.In addition,lightweight distributed algorithm finally converges to the results of centralized computation.更多还原