传感器网络节点位置不确定性研究3

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.

Node Position Uncertainty in Wireless Sensor Networks 3

This paper addresses node position uncertainty in wireless sensor network localization by int rodu2 cing t he feasible geograp hic region , which clearly represent s all feasible position scope of sensor nodes. Simple polygons are used to approximate act ual irregular feasible geograp hic region. A dist ributed algo2 rit hm is al so proposed. Simulation result s show t hat t he approximation accuracy increases 30 % , if t he number of vertex polygons increases f rom 4 to 6. In addition , lightweight dist ributed algorit hm finally converges to the result s of cent ralized comp utation.