Coverage Hole Reduction in Wireless Sensor Networks using Swarm Technique

: Proposed method tries to find holes by using information generated about network topology during route discovery and route maintenance. Each node in network maintains neighbour list, in which, name of each neighbour is stored along with status of respective neighbour. Individual nodes are responsible for maintaining status of neighbour. Each node also maintains routing table, in which routing information is stored along with pheromone value of each node. If for same destination, multiple entries are available in routing table of a node then the route with highest pheromone is selected. In this paper when a hole is detected in network path, to resolve this problem we have used three algorithms, first algorithm is routing protocol, second is hole detection algorithm and last one is to determine optimal hop count. The simulation results prove that the proposed swarm intelligence based technique remove excess burden on the network by routing algorithm used, when hole is detected in between path from source node to base station.