Optimizing D2D Communication With Practical STAR-RIS and Irregular Configurations
Device-to-device (D2D) communication offers significant potential for future wireless networks but faces challenges such as limited range, signal blockage, and interference. Reconfigurable intelligent surfaces (RISs) can mitigate these issues by dynamically controlling signal reflections. However, e...
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| Language: | English |
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IEEE
2024-01-01
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| Series: | IEEE Open Journal of Vehicular Technology |
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| Online Access: | https://ieeexplore.ieee.org/document/10543070/ |
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| author | Jung-Chieh Chen Ting-Han Hsu |
| author_facet | Jung-Chieh Chen Ting-Han Hsu |
| author_sort | Jung-Chieh Chen |
| collection | DOAJ |
| description | Device-to-device (D2D) communication offers significant potential for future wireless networks but faces challenges such as limited range, signal blockage, and interference. Reconfigurable intelligent surfaces (RISs) can mitigate these issues by dynamically controlling signal reflections. However, existing RIS-assisted D2D systems often rely on impractical infinite-resolution phase shifters and achieve limited coverage. This paper addresses these limitations by proposing a novel D2D communication system using simultaneous transmitting and reflecting RISs (STAR-RISs) with coupled and low-resolution phase shifters for cost-effective and full-space coverage D2D communication. We further introduce irregular STAR-RIS configurations where a subset of elements is strategically activated for enhanced spatial diversity. To optimize this system, a unified cross-entropy optimization (CEO) framework is developed for joint optimization of element selection (for irregular configurations) and the continuous amplitudes for transmission and reflection, along with the discrete phase shifts. Simulation results reveal that the proposed CEO-based algorithm achieves significantly higher sum rates compared to the benchmark algorithms. Furthermore, irregular STAR-RIS configurations provide additional gains in both sum rate and energy efficiency. |
| format | Article |
| id | doaj-art-635c42e317fd41f9a7000686e4e935ae |
| institution | Kabale University |
| issn | 2644-1330 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Vehicular Technology |
| spelling | doaj-art-635c42e317fd41f9a7000686e4e935ae2025-01-30T00:04:34ZengIEEEIEEE Open Journal of Vehicular Technology2644-13302024-01-01577879110.1109/OJVT.2024.340796510543070Optimizing D2D Communication With Practical STAR-RIS and Irregular ConfigurationsJung-Chieh Chen0https://orcid.org/0000-0001-6130-8621Ting-Han Hsu1Department of Electrical Engineering, National Cheng Kung University, Tainan, TaiwanInstitute of Computer and Communication Engineering, National Cheng Kung University, Tainan, TaiwanDevice-to-device (D2D) communication offers significant potential for future wireless networks but faces challenges such as limited range, signal blockage, and interference. Reconfigurable intelligent surfaces (RISs) can mitigate these issues by dynamically controlling signal reflections. However, existing RIS-assisted D2D systems often rely on impractical infinite-resolution phase shifters and achieve limited coverage. This paper addresses these limitations by proposing a novel D2D communication system using simultaneous transmitting and reflecting RISs (STAR-RISs) with coupled and low-resolution phase shifters for cost-effective and full-space coverage D2D communication. We further introduce irregular STAR-RIS configurations where a subset of elements is strategically activated for enhanced spatial diversity. To optimize this system, a unified cross-entropy optimization (CEO) framework is developed for joint optimization of element selection (for irregular configurations) and the continuous amplitudes for transmission and reflection, along with the discrete phase shifts. Simulation results reveal that the proposed CEO-based algorithm achieves significantly higher sum rates compared to the benchmark algorithms. Furthermore, irregular STAR-RIS configurations provide additional gains in both sum rate and energy efficiency.https://ieeexplore.ieee.org/document/10543070/Device-to-device (D2D) communicationreconfigurable intelligent surfaces (RISs)simultaneous transmitting and reflecting RISs (STAR-RISs)irregular STAR-RIScoupled and discrete phase shifts |
| spellingShingle | Jung-Chieh Chen Ting-Han Hsu Optimizing D2D Communication With Practical STAR-RIS and Irregular Configurations IEEE Open Journal of Vehicular Technology Device-to-device (D2D) communication reconfigurable intelligent surfaces (RISs) simultaneous transmitting and reflecting RISs (STAR-RISs) irregular STAR-RIS coupled and discrete phase shifts |
| title | Optimizing D2D Communication With Practical STAR-RIS and Irregular Configurations |
| title_full | Optimizing D2D Communication With Practical STAR-RIS and Irregular Configurations |
| title_fullStr | Optimizing D2D Communication With Practical STAR-RIS and Irregular Configurations |
| title_full_unstemmed | Optimizing D2D Communication With Practical STAR-RIS and Irregular Configurations |
| title_short | Optimizing D2D Communication With Practical STAR-RIS and Irregular Configurations |
| title_sort | optimizing d2d communication with practical star ris and irregular configurations |
| topic | Device-to-device (D2D) communication reconfigurable intelligent surfaces (RISs) simultaneous transmitting and reflecting RISs (STAR-RISs) irregular STAR-RIS coupled and discrete phase shifts |
| url | https://ieeexplore.ieee.org/document/10543070/ |
| work_keys_str_mv | AT jungchiehchen optimizingd2dcommunicationwithpracticalstarrisandirregularconfigurations AT tinghanhsu optimizingd2dcommunicationwithpracticalstarrisandirregularconfigurations |