Quispe, Jaime ; Maciel, Tarcisio Ferreira ; Silva, Yuri Carvalho Barbosa ; Klein, Anja (2021)
Beamforming and link activation methods for energy efficient RIS-aided transmissions in C-RANs.
IEEE Global Communications Conference 2021. virtual Conference and Madrid, Spain (07.-11.12.2021)
doi: 10.1109/GLOBECOM46510.2021.9685593
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
This work studies the application of a reconfigurable intelligent surface (RIS) in a cloud radio access network (C-RAN) targeting the reduction of resource usage while providing adequate capacity. We investigate if an RIS can contribute to improve the trade-off between the downlink system spectral efficiency (SE) and energy consumption of a multi-base-station (BS) multi-user single-RIS setup by means of link activation, radiated power control, and operational power mode decisions that can benefit from RIS-enhanced radio channels. For this purpose, we optimize the activations jointly with BS and RIS beamforming for maximum energy efficiency (EE) under a centralized approach and subject to SE, power, fronthaul capacity, and RIS phase-shift constraints. The associated mixed-boolean non-linear problem is solved using monotonic and semidefinite relaxation methods integrated in a Branch-Reduce-and-Bound procedure. Simulations show that the RIS helps to increase the EE of a C-RAN w.r.t. its non-RIS-aided and fully-connected versions by 30% and 80%, respectively.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Quispe, Jaime ; Maciel, Tarcisio Ferreira ; Silva, Yuri Carvalho Barbosa ; Klein, Anja |
| Art des Eintrags: | Bibliographie |
| Titel: | Beamforming and link activation methods for energy efficient RIS-aided transmissions in C-RANs |
| Sprache: | Englisch |
| Publikationsjahr: | 12 Dezember 2021 |
| Verlag: | IEEE |
| Buchtitel: | 2021 IEEE Global Communications Conference (GLOBECOM): Proceedings |
| Veranstaltungstitel: | IEEE Global Communications Conference 2021 |
| Veranstaltungsort: | virtual Conference and Madrid, Spain |
| Veranstaltungsdatum: | 07.-11.12.2021 |
| DOI: | 10.1109/GLOBECOM46510.2021.9685593 |
| Kurzbeschreibung (Abstract): | This work studies the application of a reconfigurable intelligent surface (RIS) in a cloud radio access network (C-RAN) targeting the reduction of resource usage while providing adequate capacity. We investigate if an RIS can contribute to improve the trade-off between the downlink system spectral efficiency (SE) and energy consumption of a multi-base-station (BS) multi-user single-RIS setup by means of link activation, radiated power control, and operational power mode decisions that can benefit from RIS-enhanced radio channels. For this purpose, we optimize the activations jointly with BS and RIS beamforming for maximum energy efficiency (EE) under a centralized approach and subject to SE, power, fronthaul capacity, and RIS phase-shift constraints. The associated mixed-boolean non-linear problem is solved using monotonic and semidefinite relaxation methods integrated in a Branch-Reduce-and-Bound procedure. Simulations show that the RIS helps to increase the EE of a C-RAN w.r.t. its non-RIS-aided and fully-connected versions by 30% and 80%, respectively. |
| Freie Schlagworte: | emergenCITY_KOM |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Nachrichtentechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Nachrichtentechnik > Kommunikationstechnik LOEWE LOEWE > LOEWE-Zentren LOEWE > LOEWE-Zentren > emergenCITY |
| Hinterlegungsdatum: | 15 Feb 2022 10:00 |
| Letzte Änderung: | 26 Aug 2022 10:07 |
| PPN: | |
| Projekte: | BMBF Open6GHub, DAAD PPP Brasilien |
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