Research On Mining Energy Method Of Patching Coverage Holes In Wireless Sensor Networks

Wireless sensor networks are distributed wireless multi-hopself-organizing networks which are composed by a large number of sensornodes with communication and distributed computing capabilities in space. Asintegrate sensor technology, micro electromechanical systems, system-on-chip,wireless-communications, low-power embedded technology and other subjects,it has become a hot academia topic in recent years. Nowadays, with the rapiddevelopment of science technology, the cost of sensor nodes is greatly reducedand the functions are more powerful, so WSN are widely used in various areas.Presently wireless sensor networks are used not only for military applicationssuch as battlefield surveillance outside, and also used in many industrial andcivil applications, such as wells mine, nuclear power plants and otherhazardous industrial environments, as well as traffic monitoring, ecologicalmonitoring, robotics, health care, home automation, and medical and healthfields.Wireless sensor networks involve coverage control technology, MACtechnology, wireless communication technology, energy harvesting technology,sensor technology, multi-hop ad hoc network routing protocols, data fusion,and many other important technical data management technology. Howevercoverage control technology is the first issue which must be faced in WSN. Itreflects the ability of target area sensing, monitoring and data collection ofwireless sensor networks. Good coverage technology of networks can monitorthe target area more comprehensive and accurate. However, with the continued operation of the networks, some nodes can’t work continued as they run out ofenergy or were destroyed, so which making the network appeared coverageholes, which greatly affects the quality of service, so the method of repairingcoverage holes becomes a hotspot.In recent years, aiming at the problem of repairing coverage holes,researchers have proposed a variety of repairing strategies. In general, it can bedivided into two categories: wake up dormant nodes and using mobile nodes torepair. But all these algorithms have shortcomings, for example, in the firststrategy, the number of initial dormant nodes is limited, or in the secondstrategy, it had not considered the energy consumption of repairing mobilenodes.This paper presents a kind of minimum energy algorithm of repairingcoverage holes. The basic idea of the algorithm is: firstly, according to certainrules to calculate the location of repairing mobile node, when find a position, itis not immediately to repair, but mark a virtual mobile point. Secondly, whenall the mobile point positions are found, it began to command every mobilenode moves to its specified virtual mobile point according to the rulingprinciple of minimum energy method. In order to prove the effectiveness ofthis algorithm, it is implemented on the MATLAB simulation platform.Simulation results on MATLAB platform demonstrate that this algorithm notonly can effectively repair the coverage holes, but also has a good performancein energy consumption of repairing sensor nodes.