Algorithms for minimizing the receiver interference in a wireless sensor network

Abstract

Limiting Interference between the nodes in a Wireless Sensor Network (WSN) is of considerable importance for energy-efficiency of the network. Minimizing the interference in a WSN minimizes the overall energy consumption of the network by reducing the number of conflicting transmissions. We consider Receiver interference minimization problem. Two types of interference are defined in a WSN, namely Sender interference and Receiver interference. In this paper we consider the Receiver interference problem, where the objective is to minimize the maximum Receiver interference. The problem of minimizing the maximum Receiver interference is proved to be NP-hard. In this paper we propose two algorithms named MinMax-RIP and a modified version of the same to minimize the maximum Receiver interference in a WSN. We evaluate the performance of our algorithms through simulation. We then consider the interference minimization problem in a broadcast network. We propose MinMax-BRIP algorithm for optimal range assignment which gives minimum total Receiver interference for connectivity predicate Broadcast.