Optimizing Energy Harvesting Decode-and-Forward Relays With Decoding Energy Costs and Energy Storage
Energy harvesting (EH) relay communication systems with decoding energy costs in multiple block cases have not been widely studied. This paper investigates the relay network with a decode-and-forward relay powered by EH. Unlike other works, we consider the relay with energy decoding costs which harv...
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doaj-1639d92678f94ec69262738bdac288cc2021-07-13T23:00:33ZengIEEEIEEE Access2169-35362021-01-019966139662810.1109/ACCESS.2021.30928829466131Optimizing Energy Harvesting Decode-and-Forward Relays With Decoding Energy Costs and Energy StorageYanxin Yao0https://orcid.org/0000-0002-1485-9831Zhengwei Ni1https://orcid.org/0000-0002-9895-0666Wanqiu Hu2Mehul Motani3https://orcid.org/0000-0003-3262-0207Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Advanced Equipment Intelligent Perception and Control, Beijing International Cooperation Base for Science and Technology, School of Information and Communication Engineering, Beijing Information Science & Technology University, Beijing, ChinaSchool of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou, ChinaSchool of Information and Communication Engineering, Beijing Information Science & Technology University, Beijing, ChinaDepartment of Electrical and Computer Engineering, National University of Singapore, SingaporeEnergy harvesting (EH) relay communication systems with decoding energy costs in multiple block cases have not been widely studied. This paper investigates the relay network with a decode-and-forward relay powered by EH. Unlike other works, we consider the relay with energy decoding costs which harvests random energy from both a dedicated transmitter and other ambient radio-frequency (RF) sources. The EH relay adopts a harvest-receive-forward time-switching architecture. We optimize the time fractions of the three phases and the reception rate at the relay to maximize the offline throughput for single and multiple block cases under two EH scenarios. The multi-block optimization problem constitutes a complex non-convex problem, which we decouple into a single block problem with two auxiliary variables determined by an outer optimization problem. The original problem is finally solved at the cost of linear optimization after series of tricks. Several conclusions are derived: (i) energy storage is necessary (unnecessary) when the relay harvests energy from the transmitter (ambient RF sources), (ii) the optimal reception rate remains unchanged, while the optimal time fractions vary with the energy harvested from ambient RF sources leading to different average throughput. We give numerical simulations to verify our theoretical analysis.https://ieeexplore.ieee.org/document/9466131/Energy harvestingharvest-receive-forwardrelay networkdecoding energymultiple blocks (slots) |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yanxin Yao Zhengwei Ni Wanqiu Hu Mehul Motani |
spellingShingle |
Yanxin Yao Zhengwei Ni Wanqiu Hu Mehul Motani Optimizing Energy Harvesting Decode-and-Forward Relays With Decoding Energy Costs and Energy Storage IEEE Access Energy harvesting harvest-receive-forward relay network decoding energy multiple blocks (slots) |
author_facet |
Yanxin Yao Zhengwei Ni Wanqiu Hu Mehul Motani |
author_sort |
Yanxin Yao |
title |
Optimizing Energy Harvesting Decode-and-Forward Relays With Decoding Energy Costs and Energy Storage |
title_short |
Optimizing Energy Harvesting Decode-and-Forward Relays With Decoding Energy Costs and Energy Storage |
title_full |
Optimizing Energy Harvesting Decode-and-Forward Relays With Decoding Energy Costs and Energy Storage |
title_fullStr |
Optimizing Energy Harvesting Decode-and-Forward Relays With Decoding Energy Costs and Energy Storage |
title_full_unstemmed |
Optimizing Energy Harvesting Decode-and-Forward Relays With Decoding Energy Costs and Energy Storage |
title_sort |
optimizing energy harvesting decode-and-forward relays with decoding energy costs and energy storage |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2021-01-01 |
description |
Energy harvesting (EH) relay communication systems with decoding energy costs in multiple block cases have not been widely studied. This paper investigates the relay network with a decode-and-forward relay powered by EH. Unlike other works, we consider the relay with energy decoding costs which harvests random energy from both a dedicated transmitter and other ambient radio-frequency (RF) sources. The EH relay adopts a harvest-receive-forward time-switching architecture. We optimize the time fractions of the three phases and the reception rate at the relay to maximize the offline throughput for single and multiple block cases under two EH scenarios. The multi-block optimization problem constitutes a complex non-convex problem, which we decouple into a single block problem with two auxiliary variables determined by an outer optimization problem. The original problem is finally solved at the cost of linear optimization after series of tricks. Several conclusions are derived: (i) energy storage is necessary (unnecessary) when the relay harvests energy from the transmitter (ambient RF sources), (ii) the optimal reception rate remains unchanged, while the optimal time fractions vary with the energy harvested from ambient RF sources leading to different average throughput. We give numerical simulations to verify our theoretical analysis. |
topic |
Energy harvesting harvest-receive-forward relay network decoding energy multiple blocks (slots) |
url |
https://ieeexplore.ieee.org/document/9466131/ |
work_keys_str_mv |
AT yanxinyao optimizingenergyharvestingdecodeandforwardrelayswithdecodingenergycostsandenergystorage AT zhengweini optimizingenergyharvestingdecodeandforwardrelayswithdecodingenergycostsandenergystorage AT wanqiuhu optimizingenergyharvestingdecodeandforwardrelayswithdecodingenergycostsandenergystorage AT mehulmotani optimizingenergyharvestingdecodeandforwardrelayswithdecodingenergycostsandenergystorage |
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1721304686218182656 |