Research On Energy Efficient Fault Tolerant Topology Control Of Wireless Sensor Network In Coal Mine

Wireless sensor network (WSN), as a new type of measurement and controlnetwork, has great application value in military, industrial, environmental monitoringand health and many other fields. With its rapid development, WSN has graduallybecome an important means of coal mine safety production and coal mineinformatization. Wireless sensor network topology control as a basis of buildingnetwork and communication, directly affect every aspect of wireless sensor networks,which plays an important role in prolonging the network life and improve networkperformance. This thesis mainly focuses on the issue of the reliable monitoring andenergy efficiency of underground WSN in coal mine, which provides theory basis forthe practical application of wireless sensor network in coal mine. The main works isas follows:Firstly, according to the coal mine sensor nodes is difficult to effectively perceiveevents in complex environment, combined with the Boolean perception model andprobability perception model, this thesis builds a coal mine underground roadwaynode reliable perception model. The model considers the factors that the Booleanmodel is too idealistic and credibility of probability model events perceivedprobability over a long distance is too low, combined the advantages of both, whichcan improve the reliability of WSN multi-node multi-heavy coverage informationperception in complex environment.Secondly, based on the coal mine roadway node reliable perception model, fromthe perspective of network physical topology formation, this thesis proposes a kind ofmine wireless sensor network fault tolerant topology control algorithm. Combinedwith the factors that limited mine tunnel space and complex natural environment, thealgorithm uses static node controllable deployment and K-heavy redundant coveragestrategy, making the sensor nodes to achieve maximum effective utilization rate andbetter network fault tolerance features in the limited space. At the end, the locationand quantity of the deployed nodes are analyzed through simulation.Finally, aiming at the sensor nodes with limited energy, research on the energyefficiency of deployed wireless sensor networks, this thesis proposes a mine wirelesssensor network energy balanced partitioning algorithm. Wireless sensor networkdeployed in underground tunnel existing "hot spot" problem, this thesis uses ahierarchical topology, by the network partition, quantitative analysis and balancing energy consumption among each partition, overcoming the network "hot spot"problem, in order to prolong the network life. At last, simulation analysis is carriedout in the energy consumption of the network, the network lifetime and networkdelays of the algorithm, and verifies the effectiveness of the algorithm.