تخصیص توزیع‌شده فروسو و فراسوی منابع در ارتباط دستگاه به دستگاه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی برق و کامپیوتر - دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران

2 دانشکده مهندسی برق و کامپیوتر، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران

چکیده

در سامانه‌های سلولی کنونی، عملکرد دستگاه کاربران موجود در مرز سلول به دلیل کیفیت ضعیف ارتباط، آسیب می‌بیند. حال‌ آنکه این ارتباطات به تعداد بیشتری بلوک منابع و توان انتقالی نیز نیاز دارد. برای کاهش تعداد بلوک‌های فرکانسی و توان انتقالی، این مقاله به بررسی ارتباط دستگاه به دستگاه در حالت‌های فروسو و فراسوی سامانه‌های مخابرات سلولی می‌پردازد. به‌منظور بهینه‌سازی اتصال کاربران مختلف در شبکه به معنای یافتن بهترین ارتباط (کم‌ترین میزان توان مصرفی) یک کاربر با ایستگاه پایه که ممکن است از طریق ارتباط با کاربران دیگر و یا ارتباط مستقیم با ایستگاه پایه برقرار شود و با هدف کمینه‌ کردن کل توان انتقال‌یافته، از روش‌های بهینه‌سازی متفاوتی مانند بهینه‌سازی جستجوی گرانشی، بهینه‌سازی ازدحام ذرات، بهینه‌سازی وراثتی و راهبرد توزیع‌شده مبتنی بر یادگیری Q با استفاده از تصمیم‌گیری بیشینه هموار بهره گرفته می‌شود. نتایج عددی کاهش توان حدود 30 درصد را برای این ارتباطات با پیچیدگی محاسباتی کمتر با استفاده از روش یادگیری Q نسبت به حالتی که به‌طور مرسوم تمام کاربران اتصال خود را از طریق ایستگاه پایه و به‌صورت متمرکز با پیچیدگی محاسباتی بالا برقرار می‌سازند، بیان می‌دارد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Distributed Downlink and Uplink Resource Allocation in D2D Communication

نویسندگان [English]

  • Mahsa Mohammadrezaei 1
  • Ehsan Soleimani Nasab 2
  • Esmat Rashedi 1
1 Department of Electrical and Computer Engineering, Graduate University of Advanced Technology, Kerman, Iran
2 Department of Electrical and Computer Engineering, Graduate University of Advanced Technology, Kerman, Iran
چکیده [English]

In current cellular systems, the performance of active users' devices at the cell edge suffers from the poor link quality. However, these connections also requires more resource blocks and transmission power. In order to reduce the number of resource blocks and transmission power, this paper discusses device to device communication in downlink and uplink cases of cellular communication systems. In order to optimize the connections of different network users, which means finding the best user’s connection to a base station (minimum power consumption), which may be established through communication with other users or direct connection with the base station, and to minimize the total transmission power, different optimization methods such as gravitational search optimization, particle swarm optimization, genetic optimization algorithm and distributed strategy based on Q learning and softmax decision making methods are used. The numerical results show a power reduction of around 30 percent for these distributed communications with less computational complexity using the Q learning method compared to the case in which all users traditionally connect through the base station in a centralized way with high computational complexity.

کلیدواژه‌ها [English]

  • Distributed resource allocation
  • downlink and uplink
  • device-to-device communication
  • gravitational search algorithm
  • Q learning

مراجع

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