Improving Network Lifetime using Mobile Element

In this paper, a simple yet efficient method to improve the network lifetime is designed with the help of Mobile Element (ME). The MEs act as mechanical carriers which move around in the sensing field, collecting the data from the sensors and transmitting them to the BS. In a relatively larger network, a single mobile element might not serve the purpose. Rendezvous Points (RP) can be used in the network, to enhance the performance of the WSN. Besides randomness, the generated routes are also highly dispersive and energy efficient, making them quite capable of circumventing black holes. We analytically investigate the security and energy performance of the proposed schemes. We also formulate an optimization problem to minimize the end to end energy consumption under given security constraints. Extensive simulations are conducted to verify the validity of our mechanisms.