دانلود رایگان مقاله انتقال تعاونی انرژی متعادل کننده مبتنی بر انتخاب رله و کنترل قدرت

Abstract

Energy harvesting can be leveraged by Wireless Sensor Network (WSN) to address its energy-scarcity problem, giving rise to Energy Harvesting Wireless Sensor Network (EHWSN). Residual energy balancing of sensors is the key issue to avoid sensors’ failure and promise the network function of EHWSN. In this paper, by exploiting the sensors around the source and sink as relays, we propose a distributed relay selection and power control scheme to balance sensors’ residual energy in EHWSN. To achieve the optimal power control of each relay, we formulate a maximization of minimum value problem which can be efficiently solved by utilizing its linear structure. The optimal relay is selected in a distributed manner by setting the highest priority to the relay which can maximize the minimum residual energy of sensors. Through extensive performance evaluations, we verify that DEBS can be applied to effectively balance the residual energy of sensors.

6. Conclusion

In this paper, we have proposed a cooperative transmission scheme for EHWSN, where the relay selection and power control are jointly designed to balance the residual energy of sensors. The proposed scheme operates in a distributed manner in which the optimal relay, i.e., the relay that can maximize the sensors’ residual energy, is selected to cooperate with the source for data transmission. The outcomes of this paper can provide some insights for residual energy balancing design in EHWSN, by exploiting cooperative transmission. Performance evaluation has shown that the proposed scheme can outperform other classic schemes, from the perspective of residual energy balancing. For our future work, we plan to investigate the multiple relay selection in EHWSN to balance the residual energy distribution of sensors.