Cluster-based Sleep Scheduling Protocol for Mobile Wireless Sensors Network

Mobile Wireless Sensors Networks (MWSNs) are used in several applications presenting difficult/dangerous environment and/or requiring the movement of sensors after initial deployment. Optimizing the use of the limited energy resource in a MWSN is a key cha llenge for researchers to maintain longer network survival. This paper attempts to provide an energy - efficient data routing solution for large MWSNs. The aim of this work is to propose a cluster - based scheduling protocol for MWSN. The network is firstly d ivided into an optimal number of clusters according to sensors connectivity. Secondly, a sleep scheduling algorithm is proposed to save the energy consumption by turning off the overlapped nodes in the sensing field. This method is distributed among sensor nodes in each cluster. It is based on the perimeter coverage level of mobile sensor nodes to schedule their activities according to their weight s . The weight is used to balance the energy consumption for all sensor nodes in a cluster. The proposed approac h ranges from sensors deployment and their organization to their operational mode. Experimental results demonstrate that the proposed cluster - b ased scheduling algorithm, based on the perimeter coverage of sensors, provides higher energy efficiency and long er lifetime coverage for MWSNs as compared to other protocols.