Energy-Efficient Module applied with Run Length Coding for Wireless Sensor Networks

In wireless sensor networks, sensor nodes are generally battery-operated. The efficient use of energy is very important, as the battery of sensor nodes cannot be recharged after deployment. The energy can be saved by placing the radio in the low power sleep mode, when data aren´t transmitted or received. So, our goal is to keep minimizing energy consumption of a limited battery of sensor node and to prolong the network life as long as possible by maximizing the time of low power sleep mode. In this paper, to achieve these aims, we discuss the design of a new module that has the efficient use of energy by eliminating the major waste cause such as the sensing data equal to previous sensing data in monitoring environment periodically. So, we apply run length coding and make C-module (compression-module). C-Module residing between the transport layer and application layer has the efficient use of energy by reducing traffics. The performance of C-module is studied by simulation and is compared to that of well known 802.11, S-MAC, C-module cooperating with 802.11 and C-module cooperating with S-MAC. Finally, we prove that using C-module has more improved results than not using C-module in the aspect of efficient use of energy through NS-2 simulator.