Performance analysis of a wireless sensor node using queue threshold based on priority queueing model

Abstract

A wireless sensor network (WSN) is a group of specialized sensor nodes with a communication infrastructure intended to monitor and record conditions at diverse locations. The critical issue in WSNs is represented by the limited availability of energy within the network and hence optimizing energy consumption is very important. Most existing work on sensor networks consider homogeneous sensor networks where all sensor nodes are assumed to have the same capability in terms of communication, computation, memory storage, energy supply, reliability and other aspects. Heterogeneous Sensor Network (HSN) consists of two physically different newlinetypes of sensor nodes and can significantly improve sensor network performance in terms of energy consumption. One important technique used to prolong the network lifetime of HSN is the Energy Minimization Scheme (EMS) using N-Policy Model (NPM) based on queue threshold where the energy savings happens when the packets are buffered and then transmitted but the main drawback of the NPM based on queue threshold is that the packets suffers huge delay which is not suited for delay sensitive applications. In this work, a Modified Energy Minimization Scheme (MEMS) is introduced by which the average energy consumption of individual nodes newlinein the cluster based heterogeneous sensor network is reduced during packet transmission using queue threshold based on Priority Queueing Model (PQM) in order to prolong the network lifetime of the HSN by considering priority, channel contention and node failures using M/D/1 PQM. The expression for the optimal value of threshold for which the node consumes vi minimum energy using PQM is also derived newline newline