LOW LATENCY AND ENERGY EFFICIENT S-MAC PROTOCOL FOR WSN: MAC PROTOCOL PERSPECTIVE

摘要

In a wireless sensor network (WSN), considerable amount of power is spent in processing information across the sensor nodes (SN) and a high power depletion of the SN can hamper the operation of WSN. Therefore, certain considerations are taken at each layer to reduce the energy consumption of the sensor network. The objective of this paper is to investigate different Medium Access Control (MAC) protocols and to find a suitable protocol that can reduce energy consumption considerably as well as reduce the latency than the others. The authors have found through simulation results that unified scheduling method in S-MAC protocol can improve energy efficiency as well as reduce the latency for larger as well as smaller size networks. The authors also demonstrate that Uni-Scheduling method in S-MAC protocol overcomes the diversified scheduling problem of the Border Nodes between two or more virtual clusters created in WSN.