Prologing the network lifetime using dynamic mobile sink for wirless sensor networks

Wireless Sensor Networks are used to monitor intrusion detection, battlefield surveillance, physical or environmental conditions like temperature, pressure, sound and so on because advances in micro manufacturing technology have enabled the development of low-cost, low-power, multifunctional sensor nodes for wireless communication. If the lifetime of wireless sensor network is increased means the nodes are equipped with low power battery. Energy efficient routing and sink relocating is used to increase the lifetime of sensor and this helps to increase the performance. Diverse sensing applications are also used in recent days for increasing the performance. To conserve the limited power resources of sensors to extend the network lifetime of the WSN is one of the major issues in network design. In a Wireless Sensor Network, sensor nodes deliver sensed data back to the sink through multi hopping. The sensor nodes which are present near the sink will generally consume more battery power than others and this will become one of the problems. Sink relocation is an efficient network lifetime extension method, which avoids consuming too much battery energy for a specific group of sensor nodes. Here a moving strategy called Energy-Aware Sink Relocation (EASR) is proposed for mobile sinks in WSNs. Therefore for the reduction of energy consumption of nodes, this approach uses data delivery latency. During the regular network operation, relocating the sink is very challenging. The proposed mechanism uses information related to the residual battery energy of sensor nodes to adaptively adjust the transmission range of sensor nodes and the relocating scheme for the sink. After analyzing theoretically and numerically EASR method can extend the network lifetime of the WSN.