Wang, L;
Wong, K-K;
Heath, RW;
Yuan, J;
(2017)
Wireless Powered Dense Cellular Networks: How Many Small Cells Do We Need.
IEEE Journal on Selected Areas in Communications
, 35
(9)
pp. 2010-2024.
10.1109/JSAC.2017.2720858.
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Abstract
This paper focuses on wireless powered 5G dense cellular networks, where base station (BS) delivers energy to user equipment (UE) via the microwave radiation in sub-6 GHz or millimeter wave (mmWave) frequency, and UE uses the harvested energy for uplink information transmission. By addressing the impacts of employing different numbers of antennas and bandwidths at lower and higher frequencies, we evaluate the amount of harvested energy and throughput in such networks. Based on the derived results, we obtain the required small cell density to achieve an expected level of harvested energy or throughput. Also, we obtain that when the ratio of the number of sub-6-GHz BSs to that of the mmWave BSs is lower than a given threshold, UE harvests more energy from an mmWave BS than a sub-6-GHz BS. We find how many mmWave small cells are needed to perform better than the sub-6-GHz small cells from the perspectives of harvested energy and throughput. Our results reveal that the amount of harvested energy from the mmWave tier can be comparable to the sub-6-GHz counterpart in the dense scenarios. For the same tier scale, mmWave tier can achieve higher throughput. Furthermore, the throughput gap between different mmWave frequencies increases with the mmWave BS density.
| Type: | Article |
|---|---|
| Title: | Wireless Powered Dense Cellular Networks: How Many Small Cells Do We Need |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JSAC.2017.2720858 |
| Publisher version: | https://doi.org/10.1109/JSAC.2017.2720858 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/ |
| Keywords: | Antenna arrays, Wireless communication, Throughput, Cellular networks, Energy harvesting, Radio frequency, 5G mobile communication, cellular radio, wireless powered dense cellular networks, 5G networks, base station, user equipment, UE, microwave radiation, millimeter wave, frequency, mmWave frequency, uplink information, transmission, BS density, frequency 6 GHz, Millimeter wave (mmWave), dense small cells, wireless power transfer, throughput |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10058071 |
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