ارتباطات دستگاه به دستگاه زیر-لایه در شبکه‌های سلولی موج-میلیمتری: تخصیص کانال، انتخاب نوع ارسال و کنترل توان برای سناریوهای با اطلاعات جانبی کانال کامل و محدود
الموضوعات :
نیما رئیسی
1
(گروه مهندسی برق، واحد تهران مرکزی، دانشگاه آزاد اسلامی، تهران، ایران)
الکلمات المفتاحية: نسل پنجم شبکه‌های سلولی, موج میلیمتری, تخصیص منابع, ارتباطات دستگاه به دستگاه زیر-لایه, رله تمام-دوطرفه,
ملخص المقالة :
در این مقاله، ارتباطات دستگاه به دستگاه زیر-لایه در باند فرکانسی موج-میلیمتری مورد بررسی قرار گرفته است که در آن می‌توان از رله‌های نیمه-دوطرفه / تمام-دوطرفه برای بهبود کیفیت ارسال و افزایش محدوده پوشش کمک گرفت. هدف اصلی ما انتخاب توام مود ارسالی کاربران D2D، تخصیص منابع سلولی به کاربران D2D و کنترل توان کاربران به منظور بیشینه کردن مجموع نرخ دیتای شبکه‌ی سلولی و کاربران D2D است. در تحلیل‌های انجام گرفته بر روی ویژگی‌های اصلی مخابرات موج-میلیمتری شامل پهنای باند بزرگ‌تر، امکان استفاده از آنتن‌های آرایه‌ای جهت‌دار، و سایه‌افکنی و افت توان بیشتر متمرکز شده‌ایم. از آنجا که مساله‌ی بهینه‌سازی یک مساله‌ی برنامه‌ریزی غیرخطی مختلط است، دو الگوریتم ابتکاری برای حل این مساله پیشنهاد داده‌ایم که در یکی از آن‌ها از فرض در دسترس بودن کامل اطلاعات جانبی کانال و در دیگری از فرض محدودیت در دسترسی به این اطلاعات استفاده شده است. نتایج شبیه‌سازی نشان دهنده‌ی برتری استفاده از رله‌های تمام-دوطرفه در مقایسه با استفاده از رله‌های نیمه-دوطرفه و ارتباط مستقیم کاربران به‌ویژه در لینک‌های دید غیر مستقیم -که مکانیزم اصلی انتشار در شبکه‌های موج-میلیمتری است- است. به عنوان مثال، استفاده از رله‌های تمام-دوطرفه می‌تواند نرخ دیتای مجموع را تا 1.5 برابر در مقایسه با رله‌های نیمه-دوطرفه افزایش دهد. همچنین داشتن قابلیت انتخاب بین ارتباط مستقیم یا استفاده از رله (نیمه-دوطرفه / تمام-دوطرفه) می‌تواند به بهبود عمل‌کرد سیستم - به‌ویژه هنگامی‌که میزان خود-تداخلی باقی‌مانده رله‌های تمام-دوطرفه بزرگ است - کمک کند. الگوریتم CSI محدود در مقایسه با CSI کامل دارای پیچیدگی پیاده‌سازی به مراتب پایین‌تری است. علاوه براین، هنگامی‌که تعداد منابع در دسترس در مقایسه با تعداد کاربران D2D خیلی بیشتر است (حداقل 6 برابر)، فاصله‌ی عمل‌کردی بین الگوریتم CSI کامل و CSI محدود از بین می‌رود.
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_||_
[1] A.Asadi, Q. Wang, and V. Mancuso, “A survey on device-to-device communication in cellular networks,” IEEE Communications Surveys & Tutorials, vol. 16, no. 4, pp. 1801–1819, 2014, doi: 10.1109/COMST.2014.2319555.
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[3] P. Mach, Z. Becvar, and T. Vanek, “In-band device-to-device communication in ofdma cellular networks: A survey and challenges,” IEEE Communications Surveys & Tutorials, vol. 17, no. 4, pp. 1885–1922, 2015, doi: 10.1109/COMST.2015.2447036.
[4] H. A. U. Mustafa, M. A. Imran, M. Z. Shakir, A. Imran, and R. Tafazolli, “Separation framework: An enabler for cooperative and d2d communication for future 5g networks,” IEEE Communications Surveys & Tutorials, vol. 18, no. 1, pp. 419–445, 2015, doi: 10.1109/COMST.2015.2459596.
[5] H. ElSawy, E. Hossain, and M.-S. Alouini, “Analytical modeling of mode selection and power control for underlay d2d communication in cellular networks,” IEEE Transactions on Communications, vol. 62, no. 11, pp. 4147–4161, 2014, doi: 10.1109/TCOMM.2014.2363849.
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[7] P. Sun, K. G. Shin, H. Zhang, and L. He, “Transmit power control for d2d-underlaid cellular networks based on statistical features,” IEEE Transactions on Vehicular Technology, vol. 66, no. 5, pp. 4110–4119, 2016, doiI: 10.1109/TVT.2016.2620523.
[8] Y. J. Chun, S. L. Cotton, H. S. Dhillon, A. Ghrayeb, and M. O. Hasna, “A stochastic geometric analysis of device-to-device communications operating over generalized fading channels,” IEEE Transactions on Wireless Communications, vol. 16, no. 7, pp. 4151–4165, 2017, doi: 10.1109/TWC.2017.2689759.
[9] X. Li, R. Shankaran, M. A. Orgun, G. Fang, and Y. Xu, “Resource allocation for underlay d2d communication with proportional fairness,” IEEE Transactions on Vehicular Technology, vol. 67, no. 7, pp. 6244– 6258, 2018, doi: 10.1109/TVT.2018.2817613.
[10] A. Abdallah, M. M. Mansour, and A. Chehab, “Power control and channel allocation for d2d underlaid cellular networks,” IEEE Transactions on Communications, vol. 66, no. 7, pp. 3217–3234, 2018, doi: 10.1109/TCOMM.2018.2812731.
[11] R. I. Ansari, C. Chrysostomou, S. A. Hassan, M. Guizani, S. Mumtaz, J. Rodriguez, and J. J. Rodrigues, “5g d2d networks: Techniques, challenges, and future prospects,” IEEE Systems Journal, vol. 12, no. 4, pp. 3970–3984, 2017, doi: 10.1109/JSYST.2017.2773633.
[12] A. Al-Hourani, S. Kandeepan, and E. Hossain, “Relay-assisted deviceto-device communication: A stochastic analysis of energy saving,” IEEE Transactions on Mobile Computing, vol. 15, no. 12, pp. 3129–3141, 2016, doi: 10.1109/TMC.2016.2519343.
[13] G. Liu, F. R. Yu, H. Ji, V. C. Leung, and X. Li, “In-band full-duplex relaying: A survey, research issues and challenges,” IEEE Communications Surveys & Tutorials, vol. 17, no. 2, pp. 500–524, 2015, doi: 10.1109/COMST.2015.2394324.
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[30] B. Ma, H. Shah-Mansouri, and V. W. Wong, “Full-duplex relaying for d2d communication in millimeter wave-based 5g networks,” IEEE Transactions on Wireless Communications, vol. 17, no. 7, pp. 4417– 4431, 2018, doi: 10.1109/TWC.2018.2825318.
[31] A. Abdelreheem, A. S. Mubarak, O. A. Omer, H. Esmaiel, and U. S. Mohamed, “Improved d2d millimeter wave communications for 5g networks using deep learning,” in IEEE 2nd International Conference on Computer and Information Sciences (ICCIS), 2020, pp. 1–5, doi: 10.1109/ICCIS49240.2020.9257634.
[32] T. D. Hoang, L. B. Le, and T. Le-Ngoc, “Joint mode selection and resource allocation for relay-based d2d communications,” IEEE Communications Letters, vol. 21, no. 2, pp. 398–401, 2016, doi: 10.1109/LCOMM.2016.2617863.
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