Review on Charge Scheduling Techniques for On-Demand Wireless Recheargeable Sensor Networks

Wireless sensor nodes (SNs) are deployed for wide range of applications like military surveillance, disaster warning, environmental monitoring etc. The performance of SNs degrades with time due to finite amount of energy, which affect the network lifetime and the quality of service. To improve the network lifetime, the on-demand Wireless Rechargeable Sensor Network (WRSN) was proposed. In WRSN, the SNs are charge wirelessly using mobile chargers (MCs). The main problem with the on-demand WRSN is the design of optimal charge scheduling to reduce charge latency of the SNs. The paper has presented the review on the different on-demand wireless rechargeable techniques in the literature. Recommendations for the design of an efficient on-demand charging technique to improve network lifetime and quality of service for large scale WRSN is made for future research.