Secure Nodes Deployment For Wireless Sensor Network

In the initial stage of the deployment of wireless sensor networks,the security communication links between nodes is a primary consideration in the harsh and hostile environment.And the network coverage performance directly affects the accuracy and completeness of the detected information of network and the network coverage quality.Therefore,a series of scientific problems derived from the wireless sensor network node security deployment is researched,such as study on key management of wireless sensor network,study on optimal deployment of wireless sensor network nodes based on secure connection and study on a multi-objective optimization nodes deployment of wireless sensor network based on secure connection.First,a reasonable key management scheme is adopted to ensure the establishment of a secure communication link between nodes.Then,a reasonable node deployment plan is designed to improve the quality of service on the basis of ensuring a safety communication link.The main research work of this article includes.(1)Study on key management of wireless sensor network.In the deployment area by using the hexagon group deployment network key management scheme for heterogeneous wireless sensor,each group distributed the key separately,using the node grouping of hexagonal deployment within the same region node exists a shared key with high probability and different nodes within the region shared key characteristics of small probability,enhance the node's anti capture ability.By dividing the main key pool into the sub key pool corresponding to the packet area,the probability of sharing key is increased,and the safe connectivity of nodes is improved.The Hadamard matrix key predistribution scheme is adopted between cluster heads,so that any two cluster heads can establish shared keys to achieve secure communication under the same storage cost.(2)Study on optimal deployment of wireless sensor network nodes based on secure connection.At present,the nodes of wireless sensor network coverage optimization scheme in wireless sensor network node location mobile will destroy the shared key problem between the nodes,proposes a deployment scheme for wireless wensor networks based on centroid-based virtual force and a security connection virtual force.Aiming at the optimal target of improving the nodes coverage,the proposed scheme adopts the security connection virtual force to ensure the safe connection of nodes,and aopts an improved centroid-based virtual force virtual force algorithm to effectively guide the node dispersal process and achieve global optimization.(3)Study on a multi-objective optimization nodes deployment of wireless sensor network based on secure connection.The multi-objective optimization strategy of Pareto is introduced into the node deployment of wireless sensor network,and an improved multi-objective particle swarm optimization(PSO)algorithm based on secure connection is designed.First,according to the mathematical model of Pareto multi-objective optimization,a multi-objective node safety deployment model is established,and the security connectivity and network coverage are taken as the objective functions,and both of them solve the problem of coverage quality and network security of wireless sensor network.Through adaptive adjustment of inertia weight and particle optimization strategy,multi-objective particle swarm optimization algorithm is improved,and elite file strategy is applied to maintain the optimal solution dynamically.OMNET++5.0 and Matlab 2014 a are used as simulation tools and data processing tools to verify the performance of the study node security optimization deployment.The simulation results with the existing scheme comparison analysis showed that: 1)The key management scheme of improved secure connectivity of nodes,can enhance nodes anti capture ability,and reduce the storage overhead;2)node optimal deployment based on node security connection is able to maintain a secure connection to the network and improve network coverage;3)The multi-objective optimal of nodes deployment based on secure connection the can improve the network coverage and network security safe connection.