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针对无线传感器网络中传感器节点的初始位置未知的问题,提出一种基于插值和规划算法的无线传感器网络三维节点定位算法.该算法利用锚节点坐标将节点所在空间曲面建立,并利用接收信号强度指示(RSSI)值和无线信号传播模型推导出所有可通信节点间相对距离.最后,利用0-1规划在空间曲面上选出满足距离约束且与未知节点数量相同的插值节点,从而估计出未知节点的空间位置.该算法设计简单,通信开销少.仿真结果表明,该算法具有较小的节点定位误差,并具有良好的稳定性和扩展性.
Aiming at the problem that the initial location of sensor nodes in wireless sensor networks is unknown, a three-dimensional location algorithm of wireless sensor networks based on interpolation and programming algorithms is proposed. The algorithm uses the anchor nodes coordinates to establish the space surface of the nodes and uses the received signal strength indicator (RSSI) and wireless signal propagation model. Finally, the 0-1 programming is used to select the interpolation nodes that satisfy the distance constraints and the same number of unknown nodes as the unknown nodes The algorithm is simple in design and low in communication cost.The simulation results show that the proposed algorithm has less localization errors and has good stability and expansibility.