O problema de energy hole em redes de sensores sem fios: a influência da localização dos nós sensores no consumo de energia

Abstract

Wireless Sensor Networks (WSNs) are presented as a communication and information processing tool. In order to find a way to make the most of their potencial, we explore one of the central challenges imposed by the technical features of such networks: energy consumption. In particular, we explore the Energy Hole problem, in order to evaluate the behavior of energy consumption among sensor nodes scattered in an environment. Based on: 1) homogeneous WSNs and multihop communication; 2) a model for with some degree of abstraction; and 3) spatial point processes; we propose an inhomogeneous spatial point process to evaluate one of the most important factors in energy consumption: the distribution of sensors nodes and its influence on communication. Due to the complexity of dealing with this problem from an analytical viewpoint, a Monte Carlo experiment is devised to evaluate this influence. In particular, we study the relationship between energy expended and the sensor nodes density, and the relationship between the coverage and the resulting instances from the application of the proposed spatial point process.