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Reducing the energy consumption and increasing the lifetime is the major concern in Wireless Sensor Network (WSN). In most event driven surveillance applications, the end to end delay should also be minimized. In WSN most of the energy is consumed when sensor nodes are on and waiting for an events. Sleep wake scheduling protocol can be significantly reduced the energy consumption without incurring the communication overhead. This paper presents the energy consumption by the mobile sensor nodes using 802.11 Media Access Control (MAC) and Sensor Media Access Control (SMAC) protocols and calculates total energy consumption in the network which helps to make a good balance between energy efficiency and delay.
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