For the randomness of the initial deployment of sensor nodes and the exhaustion of node energy during network operation, the problem of covering holes may be generated, the coverage repair strategies for different holes shapes are proposed. Firstly, the holes polygons formed by static nodes of randomly deployed heterogeneous wireless sensor networks are classified. Secondly, according to different polygon types, different repair strategies are adopted to determine the location of virtual repair

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... nodes. Finally, according to the distance between the virtual repair node and the mobile node, the relation function of energy threshold value, and the movement of the mobile node with finite distance, the covering cavity is repaired. Simulation results show that the coverage is improved by adopting different repair strategies according to different holes types.