A Two-step Barrier Coverage Redeployment Strategy for Hybrid Sensor Networks
Hao Zhou, Gong Chen, Yonghua Xiong, Jinhua She · 2021
In wireless sensor networks (WSNs), the strong barrier coverage might become weak or even invalid due to node failure. Relocating the mobile sensor nodes to heal the barrier gap is an effective redeployment strategy. In order to decrease the moving energy consumption, we design a two-stage hybrid nodes redeployment (THNR) based on the virtual barrier curve concept to search the barrier gaps in directional WSNs and fully utilize the rotation ability of directional sensors to firstly minimize the barrier gaps based on distributed particle swarm optimization algorithm. Then, an efficient scheduling method is designed for mobile nodes to minimize mobile distance. Simulations are presented to prove that our method THNR has a good performance on healing barrier gaps.