A hybrid Column Generation‐GRASP heuristic to extend the lifetime in wireless sensor networks with connectivity and coverage constraints
Résumé
In order to extend the lifetime in wireless sensor networks with connectivity and coverage constraints, a hybrid Column Generation‐GRASP heuristic is proposed. The method decomposes the problem into two. A master problem, used for the timing decisions, and an auxiliary problem to identify profitable columns, i.e., subsets of sensors connected to the base station that cover at least a predefined fraction of the targets. To solve the auxiliary problem efficiently, a GRASP heuristic is used to identify the interesting columns. The method is shown to be able to find (near) optimal solutions in low computational times.