Abstract: “A Wireless Sensor Network comprises of number of nodes distributed over an area to collect information. The sensor nodes communicate among themselves through the wireless channel and forward the collected data to its one-hop distant neighboring node. These nodes are normally battery operated. But as these nodes are placed in such conditions that charging or replacing battery of these nodes are nearly impossible, energy consumption becomes a major factor. Here we are creating a network once with Sensor-MAC (SMAC) and again with Sensor- MAC with sleep schedule. After simulating these networks in different topologies network of SMAC-L is found to give better results in life time and energy consumption when compared to network of SMAC.”

Keywords: Global Sleep Schedule, Medium Access Control Protocol, Sensor-MAC (SMAC), Sensor-MAC with sleep schedule (SMAC-L). Wireless Sensor Network