Fault-Tolerant Energy-Efficient Tree in Dynamic WSNs

Abstract

Broadcasting has a main importance in Wireless Sensor Networks (WSNs). Effectively, the sink node has to collect periodically, data from the environment supervised by sensors. To perform this operation, it sends requests to all nodes. Furthermore, WSNs have a dynamic behaviour due to their evolution. At any time, a node can be retrieved from the network due to an exhausting energy or a node problem. In fact, WSNs are prone to failure such as software or hardware malfunctioning, exhaustion of energy, wireless interference and environmental hazards. Thus, an appropriate broadcasting method should take into consideration this aspect and uses the less possible amount of energy to accomplish the task. In this paper, a robust tree-based scheme is proposed which is called Robust Tree Broadcasting (RTB). The new scheme has a load-balanced behaviour which induces an efficient use of energy. In addition, RTB has a high-quality fault tolerant performance.