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Lagrangian Dual Decomposition for Joint Resource Allocation Optimization Problem in OFDMA Downlink Networks
المؤلفون المشاركون
Zhou, Lin
He, Yu-Cheng
Jia, Li-Jun
Chen, Dong-Hua
المصدر
Mathematical Problems in Engineering
العدد
المجلد 2018، العدد 2018 (31 ديسمبر/كانون الأول 2018)، ص ص. 1-10، 10ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2018-10-30
دولة النشر
مصر
عدد الصفحات
10
التخصصات الرئيسية
الملخص EN
This paper proposes an efficient method for joint power and subcarrier allocation in a multicell multiuser OFDMA downlink network.
The joint optimization problem is formulated with the objective of maximizing the energy efficiency subject to the constraints on the quality of service in sum transmission rates for each cell and the total transmit power for the network.
Due to intercell cochannel interferences and multiple variable coupling, the problem is intractable in its original form.
To relax the difficulties in coordinating cochannel interferences, we introduce the tolerable interferences constraints for interference channels.
To cope with the multiple variable coupling, we decompose the joint optimization problem into two iterative processes of user scheduling and a parametric convex optimization problem, where the energy efficiency is treated as the parameter and approached by bisection search.
Then, by double dual decomposition, the parametric convex problem is transformed into Lagrangian dual problems at two levels of cells and subcarriers, and a decentralized solution is obtained in closed form.
Based on the reformulations, an iterative subgradient algorithm is presented for approaching the joint optimization problem with acceptable complexity.
Computer simulations are conducted to validate the proposed algorithm and examine the effects of various system parameters.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Jia, Li-Jun& He, Yu-Cheng& Chen, Dong-Hua& Zhou, Lin. 2018. Lagrangian Dual Decomposition for Joint Resource Allocation Optimization Problem in OFDMA Downlink Networks. Mathematical Problems in Engineering،Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1208590
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Jia, Li-Jun…[et al.]. Lagrangian Dual Decomposition for Joint Resource Allocation Optimization Problem in OFDMA Downlink Networks. Mathematical Problems in Engineering No. 2018 (2018), pp.1-10.
https://search.emarefa.net/detail/BIM-1208590
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Jia, Li-Jun& He, Yu-Cheng& Chen, Dong-Hua& Zhou, Lin. Lagrangian Dual Decomposition for Joint Resource Allocation Optimization Problem in OFDMA Downlink Networks. Mathematical Problems in Engineering. 2018. Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1208590
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1208590
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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