Relay Selection and Performance Analysis of Wireless Energy Harvesting Networks
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Relay Selection and Performance Analysis of Wireless Energy Harvesting Networks Sankalita Biswas1 · Dipen Bepari2 · Soumen Mondal3
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract We proposed an integrated information relay and wireless power supply assisted RF energy harvesting-based cooperative dual-hope decode-and-forward (DF) relaying communication model. The relay node not only aids the communication between energy constrained source and destination but also supply power to them using time switching (TS) protocol. We also proposed a relay selection protocol where the source is capable of selecting an appropriate relay link on the basis of channel gain condition. The performance of the system in terms of outage probability and achievable ergodic capacity over Rayleigh fading channels are thoroughly analyzed. Closed from analytical expression of outage probability of the considered system is derived and authenticated by the Monte-Carlo simulation result. The results show the impact of the number of relay nodes on outage probability and achievable ergodic capacity. Simulation results also demonstrated the optimum energy harvesting time for which system achieves maximum throughput and minimum outage probability. Keywords Energy harvesting · DF-relay · WPCN · Outage probability
1 Introduction In modern wireless communication, significant enhancement in the application of wireless sensor networks (WSNs) ranging from environmental monitoring to human health control and security, further increases the problem of prolonging network lifetime. To address the * Dipen Bepari [email protected] Sankalita Biswas [email protected] Soumen Mondal [email protected] 1
Department of Electronics and Communication Engineering, National Institute of Technology Hamirpur, Hamirpur, Himachal Pradesh 177005, India
2
Department of Electronics and Communication Engineering, Vaagdevi College of Engineering, Warangal, Telangana, India
3
Department of Electronics and Communication Engineering, National Institute of Technology, Durgapur, WB, India
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expensive and inconvenient process of changing or recharging batteries, energy harvesting (EH) emerged as a useful technique that can prolong the battery life of wireless devices [1, 2]. In compared to various conventional EH methods, such as solar, thermoelectric effects, wind, vibration, etc., wireless energy harvesting (WEH) has received significant attention due to the controllability and predictability in the harvested energy. In WEH, the antenna of sensor nodes (SNs) receive ambient radio frequency radiation and converts into a direct current (DC) voltage using an appropriate rectifier circuit [3, 4]. Fundamental concepts of EH sensor nodes and its applications are discussed in [5]. The harvested energy is stored in batteries for using at the time of information transmission. This architecture of EH receiver is commonly categorized as power splitting (PS) receiver and time switching (TS) rece
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