A multi-node overlap sensor ratio based coverage enhancing algorithm in wireless multi-media sensor networks

The coverage problem is one of the key technologies of Wireless Multi-media Sensor Networks (WMSNs). The covering effect has a great influence on the monitoring ability, quality of service, network lifetime of WMSNs. Therefore, a new Multi-node Overlap Sensor Ratio Based Coverage Enhancing Algorithm (M-OSRCEA) is proposed in this paper to achieve the high QoS of WNSNs. Since the 3D sensing models are more complex but closer to the real situation, a complex 3D directional sensing model is established in this paper, and the key parameters are calculated precisely. Different from the current 3D distributed coverage enhancing algorithm, the shock characteristic during coverage enhancing is considered as the key parameter. A multi-node based dynamic shock eliminating mechanism is designed and calculating the overlap ratio of single node, an error reducing method based on size coefficient is presented. In order to evaluate the performance of the proposed algorithm that the simulation experiments are designed. The results show the proposed algorithm is better in coverage-enhancing compared with other distributed coverage enhancing algorithms.