Cluster size optimisation with Tunable Elfes sensing model for single and multi-hop wireless sensor networks

Abstract

ABSTRACTMinimising energy dissipation and maximising network coverage are the crucial aspects of wireless sensor networks (WSNs). The nodes of a sensor network are grouped into several non-overlapping subset to facilitate the network scalability and design of energy efficient system. Selecting optimal clusters provide significant gain in terms of network lifetime, system scalability, collision avoidance and end-to-end delay. Network coverage is another critical issue which depends on sensing model like deterministic sensing model and probabilistic sensing model. In this paper, we have proposed Tunable Elfes Sensing Model. This model is preferable in case of remote area application in WSNs, where nodes in the core of network closer to base station (BS) are modelled deterministically, whereas peripheral nodes are modelled probabilistically. Thus, we can model energy efficient system with large coverage area. In this paper, we have provided expression for optimal cluster using Tunable Elfes sensing model of BS for square and circular sensing field using single-hop communication between cluster heads (CHs) and BS with consideration of boundary effect. We have also analysed the optimal clusters for square and circular type of sensing field using Tunable sensing model for BS multi-hop communication between CHs and BS.