An Energy-efficient and Collision-reduced MAC protocol for Wireless Sensor Networks adapting Single Homogenous scheme based on border node handover procedure

Abstract

Wireless sensor node is a micro-electric device that can be equipped with constrained power source and it is generally unrealistic to charge or replace the exhausted battery, which gives way to the primary objective of maximizing node/network lifetime. Therefore energy efficiency is one of the most important issues in wireless sensor networks and an important attribute sensor network MAC protocols. Sensor-MAC (SMAC), the widely used protocol may require some nodes to adapt multiple sleep/listen schedules which results in the early death of border nodes and this problem has a significant adverse on the lifetime and connectivity of WSNs. Although this problem can be solved by modifying SMAC with border node handover procedure, some nodes may encounter collision which is one of the major causes of energy waste. This paper presents the modified SMAC adjusting single homogeneous scheme based on border node handover procedure in order to reduce or eliminate collision amongst the border node area. The impact of the novel approach on the network performance is compared with SMAC and the modified SMAC with border node handover procedure through simulation.