Abstract
In this paper, we propose a hybrid protocol for energy harvesting in wireless relay networks, which combines the benefits of both time-switching relaying (TSR) and power-splitting relaying (PSR), which are two main protocols for energy harvesting. In TSR, a dedicated harvesting time in each time slot is allocated for energy harvesting, while the remaining time is used for information transmission. In PSR, a portion of received power is split for energy harvesting. TSR can simplify the hardware compared to PSR, but reduce the throughput or achievable rate of the system. Specifically, we conduct a rigorous analysis to derive the closed-form formulas for performance factors of the system. We deliver the analysis results for various transmission modes: instantaneous transmission, delay-limited transmission, and delay-tolerant transmission, which are different from each other on the availability of statistical information about the channels between source and relay nodes. The results are also confirmed by Monte Carlo simulation. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Highlights
Energy harvesting, which alludes for wireless energy collection from the source devices to the relay nodes without requirements of battery charging or replacement, has been broadly anticipated to be an essential cornerstone to enhance system performance and bolster new amenities beyond 2020 in future 5G systems
Simultaneous wireless information and power transfer (SWIPT) has attracted a lot of research in wireless communication eld recently [1], [2]. This is developed as a promising technique, especially for wireless relay networks, in which the source transfers the information to the relay nodes, and supplies its energy to relay nodes so that the relays can forward the information to the destination in the phase
SWIPT can solve the energy problem at the relay, which is the main obstacle for relay networks to be implec 2017 Journal of Advanced Engineering and Computation (JAEC)
Summary
Energy harvesting, which alludes for wireless energy collection from the source devices to the relay nodes without requirements of battery charging or replacement, has been broadly anticipated to be an essential cornerstone to enhance system performance and bolster new amenities beyond 2020 in future 5G systems. We represent the latest analysis on the performance of hybrid TSR-PSR protocol for amplify-and-forward half-duplex relaying networks. Provide the rigorous analysis on the performance of hybrid TSR-PSR energy harvesting protocol for amplify-and-forward relay networks, in terms of the closed-form expressions for outage probability and the throughput of the system in delay-limited transmission mode;. The half-duplex relaying network of interest is illustrated, where the source S sends information to the destination D with the help of a relay R For relaying strategy, this network employs the amplify-and-forward protocol at the relay node. As a result, |h|2 is an exponential random variable with parameter λh, and |g|2 is exponentially distributed with parameter λg
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