3-D Localization Algorithm of Time-Changed Wireless Sensor Networks Based on Initial Topographical Information and its engineering application

In this paper, we propose one 3-D Localization Algorithm of Time-Changed Wireless Sensor Networks Based on Initial Topographical Information. The basic idea is first to apply the optimization method, anchors selection strategy and limited region traversal method to locate the unknown sensors by introducing initial topographical information, then relocate the moving sensors based on the communication information between the fixed anchors and sensors at different time by using extension line method. We are able to know the topographical changing information by the sensors´ locations. Simulation results on one landslide region show that this algorithm is effective to locate the time-changed wireless sensor network and solve engineering problems. The method will be extensively used in the field of monitoring and predicting topographical changes of landslide regions.