Abstract
A wireless-powered sensor network (WPSN) consisting of one hybrid access point (HAP), a near cluster and the corresponding far cluster is investigated in this paper. These sensors are wireless-powered and they transmit information by consuming the harvested energy from signal ejected by the HAP. Sensors are able to harvest energy as well as store the harvested energy. We propose that if sensors in near cluster do not have their own information to transmit, acting as relays, they can help the sensors in a far cluster to forward information to the HAP in an amplify-and-forward (AF) manner. We use a finite Markov chain to model the dynamic variation process of the relay battery, and give a general analyzing model for WPSN with cluster cooperation. Though the model, we deduce the closed-form expression for the outage probability as the metric of this network. Finally, simulation results validate the start point of designing this paper and correctness of theoretical analysis and show how parameters have an effect on system performance. Moreover, it is also known that the outage probability of sensors in far cluster can be drastically reduced without sacrificing the performance of sensors in near cluster if the transmit power of HAP is fairly high. Furthermore, in the aspect of outage performance of far cluster, the proposed scheme significantly outperforms the direct transmission scheme without cooperation.
Highlights
Radio-Frequency (RF) based wireless energy transfer technique has recently became a newly emerging technology to charge the energy-constrained wireless networks [1,2,3,4]
It is known that the outage probability of sensors in far cluster can be drastically reduced without sacrificing the performance of sensors in near cluster if the transmit power of hybrid access point (HAP)
We propose that if sensors in near cluster don’t have their own information to transmit, acting as relays, they can help the sensors in far cluster to forward information to the HAP in an Amplify-and-Forward (AF) manner
Summary
Radio-Frequency (RF) based wireless energy transfer technique has recently became a newly emerging technology to charge the energy-constrained wireless networks [1,2,3,4]. The performance of the cooperative network by switching the relay operation between energy harvesting and information transmission just according to whether the relay battery level exceeds the predefined value is analyzed in [18]. Multi-relay wireless-powered cooperative communication network are analyzed in [19,20,21], where authors consider the energy accumulation of the relay battery and propose various relay section schemes. The idea of using wireless-powered relay for device-to device (D2D) network is proposed in [25], where user equipment harvests energy from the access point and use the accumulated energy for D2D communication by acting as a relay. Applying the wireless energy transfer into wireless sensor networks, a dedicated energy harvesting relay for relaying information in wireless-powered cooperative communication networks (WPCCN) is studied in [31,32]. Simulation results validate the start point of designing this paper and correctness of theoretical analysis and show how parameters have effect on system performance
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
