An on-demand scheduling scheme for mobile charger in wireless rechargeable sensor networks

Restricted energy of sensor node is a serious concern in wireless sensor networks (WSNs) which causes for loosing data or may be the whole network failure. To overcome this problem the concept of wireless energy transfer (WET) has been introduced which attract huge attention throughout academia and industry to address energy shortages or fulfil the energy requirements. The lifespan of sensor nodes can be extend using WET that restore the battery power of the sensor nodes by recharging the nodes through one or more chargers. However, recharging the nodes in the network is NP-hard problem. In this paper, we present priority scheduling algorithm (PSA) for charging wireless sensor nodes in on-demand wireless rechargeable sensor networks. The lifetime of the sensor nodes is mainly considered as the priority parameters in the proposed PSA algorithm. We simulate the proposed PSA algorithm and compare the results with existing well-known algorithms to show its out performance.

Keywords:

WSNs , WET , First come first serve , Priority scheduling algorithm , Nearest job next with preemption