Research On The Coverage Optimization Algorithm Of Wireless Sensor Network

Wireless sensor networks is a new kind of information access technology, which is formed with the development of wireless communication ,embedded computing technology, sensor technology, MEMS technology, and distributed information processing technology. It is currently cutting-edge and hot research area which is the concern of international arena, and involves a high degree of cross-multidisciplinary of subjects and highly integrated knowledge. It is a new computing model, and it is hot IT technology that will have a significant impact on lifestyle of mankind in the 21st century following the Internet. It will combine the logical world of information and physical world together, and will change the way of interaction between man and nature. The application of wireless sensor networks have been expanded from the original military field to a number of civilian areas, such as environmental monitoring, space exploration, anti-terrorism riot, disaster rescuing, medical care, intelligent furniture, the economical agriculture, personnel orientation.Network coverage is critical and basic issue for research and application of wireless sensor networks. It is the basis of other network research, directly affecting the network performance. the importance of network coverage in wireless sensor network design and network connections is in the same position. Both of the network to run the basic problems must be solved. In this paper, according to the node distribution and the specific application, the node scheduling algorithm is proposed to improve the quality of the regional coverage, and the multi-covering algorithm is put forward for key objectives.(1) For the situation that covering regional nodes are densely distributed, wireless sensor network node scheduling strategy is put forward which is based on K re-assurance mechanisms, thus increases the number of sleep redundant nodes.(2)For the situation that majority of K re-covering algorithm are to ensure regional coverage, coverage optimization method is proposed for the target. The multiple coverage of important goal is ensured through the effect of virtual power(3)The characteristics of the limited capacity of sensor network nodes, the large number and density decide that the perception capacity only can be improved by multi-node cooperation to perceive objectives. According to this characteristic, the thought that multiple nodes cooperate with each other to improve the perception of targets and coverage quality is formed.(4) Through the monitoring of mobile node to the blind area, for the problem, mobile node energy consumption and mathematical optimization model for the balance of probability of network coverage are established. Finally, an approach to improve performance of the wireless sensor network coverage is put forward from theory by using the mobility of node.