Spectrum-Aware Energy Efficiency Analysis in <i>K</i>-tier 5G HetNets
In future multi-tier cellular networks, cognitive radio (CR) compatible with device-to-device (D2D) communication can be an aid to enhance system spectral efficiency (SE) and energy efficiency (EE). Users in proximity can establish a direct connection with D2D communication and bypass the base stati...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/10/7/839 |
| _version_ | 1797539166131585024 |
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| author | Fereidoun H. Panahi Farzad H. Panahi Tomoaki Ohtsuki |
| author_facet | Fereidoun H. Panahi Farzad H. Panahi Tomoaki Ohtsuki |
| author_sort | Fereidoun H. Panahi |
| collection | DOAJ |
| description | In future multi-tier cellular networks, cognitive radio (CR) compatible with device-to-device (D2D) communication can be an aid to enhance system spectral efficiency (SE) and energy efficiency (EE). Users in proximity can establish a direct connection with D2D communication and bypass the base stations (BSs), thereby offloading the network infrastructure and providing EE improvement. We use stochastic geometry to model and analyze cognitive D2D communication underlying a multi-tier/multi-channel cellular network where the D2D transmitters are capable of harvesting RF energy from ambient interference resulting from simultaneous cellular downlink transmissions. For further improvement in EE, small cells (SCs) can be put into a power-saving mode by specifying a load-dependent transmission power coefficient (TPC) for SC BSs. In addition, to consider practical D2D communication scenarios, we propose a wireless video sharing framework where cache-enabled users can store and exchange popular video files through D2D communication. We investigate the potential effects of the TPC and the introduced D2D layer on the network EE and SE. We will also observe that the energy-harvesting CR-based D2D communication network design will not only ease the spectrum shortage problem but will also result in a greener network thanks to its reliance on ambient energies. |
| first_indexed | 2024-03-10T12:41:22Z |
| format | Article |
| id | doaj.art-3339ba10a9354ba0857ed78fe1a0e17b |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-10T12:41:22Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-3339ba10a9354ba0857ed78fe1a0e17b2023-11-21T13:48:24ZengMDPI AGElectronics2079-92922021-04-0110783910.3390/electronics10070839Spectrum-Aware Energy Efficiency Analysis in <i>K</i>-tier 5G HetNetsFereidoun H. Panahi0Farzad H. Panahi1Tomoaki Ohtsuki2Department of Electrical Engineering, University of Kurdistan, Sanandaj 44001, IranDepartment of Electrical Engineering, University of Kurdistan, Sanandaj 44001, IranDepartment of Information and Computer Science, Keio University, Yokohama 223-8522, JapanIn future multi-tier cellular networks, cognitive radio (CR) compatible with device-to-device (D2D) communication can be an aid to enhance system spectral efficiency (SE) and energy efficiency (EE). Users in proximity can establish a direct connection with D2D communication and bypass the base stations (BSs), thereby offloading the network infrastructure and providing EE improvement. We use stochastic geometry to model and analyze cognitive D2D communication underlying a multi-tier/multi-channel cellular network where the D2D transmitters are capable of harvesting RF energy from ambient interference resulting from simultaneous cellular downlink transmissions. For further improvement in EE, small cells (SCs) can be put into a power-saving mode by specifying a load-dependent transmission power coefficient (TPC) for SC BSs. In addition, to consider practical D2D communication scenarios, we propose a wireless video sharing framework where cache-enabled users can store and exchange popular video files through D2D communication. We investigate the potential effects of the TPC and the introduced D2D layer on the network EE and SE. We will also observe that the energy-harvesting CR-based D2D communication network design will not only ease the spectrum shortage problem but will also result in a greener network thanks to its reliance on ambient energies.https://www.mdpi.com/2079-9292/10/7/839energy efficiencyoverlay and underlay in-band D2Ddetection and false alarm probabilityspectrum sensingcache-enabled multi-tier cellular networkenergy harvesting |
| spellingShingle | Fereidoun H. Panahi Farzad H. Panahi Tomoaki Ohtsuki Spectrum-Aware Energy Efficiency Analysis in <i>K</i>-tier 5G HetNets Electronics energy efficiency overlay and underlay in-band D2D detection and false alarm probability spectrum sensing cache-enabled multi-tier cellular network energy harvesting |
| title | Spectrum-Aware Energy Efficiency Analysis in <i>K</i>-tier 5G HetNets |
| title_full | Spectrum-Aware Energy Efficiency Analysis in <i>K</i>-tier 5G HetNets |
| title_fullStr | Spectrum-Aware Energy Efficiency Analysis in <i>K</i>-tier 5G HetNets |
| title_full_unstemmed | Spectrum-Aware Energy Efficiency Analysis in <i>K</i>-tier 5G HetNets |
| title_short | Spectrum-Aware Energy Efficiency Analysis in <i>K</i>-tier 5G HetNets |
| title_sort | spectrum aware energy efficiency analysis in i k i tier 5g hetnets |
| topic | energy efficiency overlay and underlay in-band D2D detection and false alarm probability spectrum sensing cache-enabled multi-tier cellular network energy harvesting |
| url | https://www.mdpi.com/2079-9292/10/7/839 |
| work_keys_str_mv | AT fereidounhpanahi spectrumawareenergyefficiencyanalysisinikitier5ghetnets AT farzadhpanahi spectrumawareenergyefficiencyanalysisinikitier5ghetnets AT tomoakiohtsuki spectrumawareenergyefficiencyanalysisinikitier5ghetnets |