信标节点漂移情况下的无线传感器网络节点定位机制

针对信标节点漂移情况下的节点定位问题，提出了一种分布式的信标节点漂移检测方法，采用节点自评分和协商机制，自动寻找可能发生了漂移的信标节点，同时针对大量信标节点发生漂移后的定位覆盖率下降问题，构建普通节点的定位可信度模型，并在定位盲区内使用一些较为可靠的普通节点作为临时信标节点进行定位。仿真实验表明，该算法在误检测、定位误差方面性能优于传统算法，具有较低的通信开销、较高的实用性和灵活性。

Node localization scheme in wireless sensor networks under beacon drifting scenes

Due to the accidentally position change of the beacons in wireless sensor networks, a distributed detecting mechanism of drifting beacon nodes is introduced based on self-scoring and consultation, therefore the drifting beacon nodes can be detected automatically. After studying the current node localization methods, an improved localization method is introduced against the localization coverage decreasing situation caused by beacon nodes drifting. A credibility model of the normal node localization method is built, and it is used as a basis to upgrade normal nodes as temporary beacon nodes in localization blind areas. Simulation results show that the performance of this algorithm is superior to other traditional algorithms in error detection rate, positioning error and communication cost aspects, and this algorithm has higher practicability and flexibility.