Lifetime Improvement of Wireless Sensor Network Using Multi-hop Adaptive Modulation

The lifetime of the WSNs depends only on energy system. To keep the cost and size of these sensors small, they are equipped with small batteries. In large number of applications, it is impossible to charge and replace the batteries to extend the lifetime of the wireless sensor network.. The node's energy consumption optimize through the multi-hop adaptive modulation scheme that used in node communications. In this work, Adaptive Modulation is proposed for lifetime improvement in wireless sensor Networks. The objective of proposed adaptive modulation approach is to save the energy of lowest energy nodes by increasing energy consumption of other nodes that has highest residual energy.. The results show that with adaptive modulation we can minimize the energy consumption of node. In term of lifetime, existing adaptive modulation giving 50% better result than fix modulation whereas proposed approach is giving 72% better result than fix modulation approach. Keywords—wireless sensor network; Multi-hop adaptive modulation; lifetime; 2FSK,4FSK,8FSK.