Energy efficient optimal opportunistic routing using sleep mode for wireless sensor network

Wireless Sensor Networks continue to captivate the considerable attention of researchers. Energy consumption is a vital problem in Wireless Sensor Networks which are integrated with battery. Due to this limitations, the efficiency of the network is reduced drastically. In this paper, the concept of Optimal Opportunistic Routing using Sleep mode (O2RS) is introduced to optimize and preserve energy among sensor nodes leading to increased efficiency of the linear (1-D) system. The candidate forwarder set is formed by selecting nodes from the network based on their residual energy as well as the nodes nearest to the Optimum Energy Node (OEN) which is calculated based upon optimal distance. The unconsumed energy of all nodes in forwarder set is calculated and data packets are broadcasted. The data packets are dropped by nodes having a low energy level, hence only high energy level nodes are utilized for transmission of data. During transmission of data packets, sleep mode ensures that nodes are active only during transmission which in turn tends to preserve their energy. This increases overall network lifetime. The simulation results show that the proposed system O2RS provides intensive aid to energy consumption for Wireless Sensor Networks. The nodes which are in sleep mode increase data rates and reliability. The proposed system is being compared with other conventional opportunistic routing protocols which prove that O2RS protocol is beneficial to conserve energy for prolonged lifetime.