A NODE SELECTION AND ROUTING ALGORITHM FOR SPECTRUM DETECTION IN WIRELESS SENSOR NETWORKS
TV Universit · Computer Applications and Software · 2014
Aiming at spectrum detection issue in wireless sensor networks,we first use energy-based detector to collect information data from each sensor node,and then propose a node selection and routing algorithm for spectrum detection. The algorithm iteratively selects and aggregates optimal sensor nodes under given energy constraint to form an energy-effective routing tree,in it each parent node fuses the information of every child node of it by using log-likelihood ratios and then forwards to query node,it is by the query node to determine whether the main user occupies the band or not. Therefore,the overall probability of detection( PD) is maximised at querying node for a given probability of false alarm( PFA) and a given power budget needed for sensor network to send the information. Simulation experimental results show that the proposed algorithm is effective,and is superior to the traditional methods in terms of the detection probability and lifetime of network.