Design of dynamic active‐passive beamforming for reconfigurable intelligent surfaces assisted hybrid VLC/RF communications
Abstract The hybrid visible light communication (VLC)/radio frequency (RF) communications are investigated with the aid of reconfigurable intelligent surfaces (RISs) in dynamic wireless networks, where the RIS access selection processes of VLC/RF users are updated depending on the channel quality dy...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-08-01
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| Series: | IET Communications |
| Online Access: | https://doi.org/10.1049/cmu2.12432 |
| _version_ | 1797995085681393664 |
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| author | Yufeng Han Yue Xiao Xiaonan Zhang Yulan Gao Qiaonan Zhu Binhong Dong |
| author_facet | Yufeng Han Yue Xiao Xiaonan Zhang Yulan Gao Qiaonan Zhu Binhong Dong |
| author_sort | Yufeng Han |
| collection | DOAJ |
| description | Abstract The hybrid visible light communication (VLC)/radio frequency (RF) communications are investigated with the aid of reconfigurable intelligent surfaces (RISs) in dynamic wireless networks, where the RIS access selection processes of VLC/RF users are updated depending on the channel quality dynamically. Specifically, a dynamic optimization problem due to the mobility of users and time‐varying selection strategy is formulated. Under the constraints of the average minimum rate for VLC/RF users and the maximum transmit power constraints for VLC/RF access points (APs), the target is to minimize the average long‐term power consumption, by jointly considering the active beamforming at APs and the passive beamforming at RISs. Based on the Lyapunov optimization framework and the drift‐plus‐penalty (DPP) algorithm, the original optimization problem is transformed into corresponding short‐term problems at each frame. Furthermore, the closed form solutions with active‐passive beamforming are derived using the fractional programming method based on the Lagrangian dual theory. Finally, numerical results demonstrate the convergence and effectiveness of the proposed optimization algorithm. |
| first_indexed | 2024-04-11T09:55:53Z |
| format | Article |
| id | doaj.art-17653267732c43b88250e7d7785e68e6 |
| institution | Directory Open Access Journal |
| issn | 1751-8628 1751-8636 |
| language | English |
| last_indexed | 2024-04-11T09:55:53Z |
| publishDate | 2022-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Communications |
| spelling | doaj.art-17653267732c43b88250e7d7785e68e62022-12-22T04:30:37ZengWileyIET Communications1751-86281751-86362022-08-0116131531154410.1049/cmu2.12432Design of dynamic active‐passive beamforming for reconfigurable intelligent surfaces assisted hybrid VLC/RF communicationsYufeng Han0Yue Xiao1Xiaonan Zhang2Yulan Gao3Qiaonan Zhu4Binhong Dong5National Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of China Chengdu ChinaNational Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of China Chengdu ChinaDepartment of Computer Science Florida State University Tallahassee USANational Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of China Chengdu ChinaNational Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of China Chengdu ChinaNational Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of China Chengdu ChinaAbstract The hybrid visible light communication (VLC)/radio frequency (RF) communications are investigated with the aid of reconfigurable intelligent surfaces (RISs) in dynamic wireless networks, where the RIS access selection processes of VLC/RF users are updated depending on the channel quality dynamically. Specifically, a dynamic optimization problem due to the mobility of users and time‐varying selection strategy is formulated. Under the constraints of the average minimum rate for VLC/RF users and the maximum transmit power constraints for VLC/RF access points (APs), the target is to minimize the average long‐term power consumption, by jointly considering the active beamforming at APs and the passive beamforming at RISs. Based on the Lyapunov optimization framework and the drift‐plus‐penalty (DPP) algorithm, the original optimization problem is transformed into corresponding short‐term problems at each frame. Furthermore, the closed form solutions with active‐passive beamforming are derived using the fractional programming method based on the Lagrangian dual theory. Finally, numerical results demonstrate the convergence and effectiveness of the proposed optimization algorithm.https://doi.org/10.1049/cmu2.12432 |
| spellingShingle | Yufeng Han Yue Xiao Xiaonan Zhang Yulan Gao Qiaonan Zhu Binhong Dong Design of dynamic active‐passive beamforming for reconfigurable intelligent surfaces assisted hybrid VLC/RF communications IET Communications |
| title | Design of dynamic active‐passive beamforming for reconfigurable intelligent surfaces assisted hybrid VLC/RF communications |
| title_full | Design of dynamic active‐passive beamforming for reconfigurable intelligent surfaces assisted hybrid VLC/RF communications |
| title_fullStr | Design of dynamic active‐passive beamforming for reconfigurable intelligent surfaces assisted hybrid VLC/RF communications |
| title_full_unstemmed | Design of dynamic active‐passive beamforming for reconfigurable intelligent surfaces assisted hybrid VLC/RF communications |
| title_short | Design of dynamic active‐passive beamforming for reconfigurable intelligent surfaces assisted hybrid VLC/RF communications |
| title_sort | design of dynamic active passive beamforming for reconfigurable intelligent surfaces assisted hybrid vlc rf communications |
| url | https://doi.org/10.1049/cmu2.12432 |
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