A cluster-based resource allocation in a two-tier OFDMA femtocell networks

被引：0
|
作者：
Zhang H. [1 ,2 ]
Mu L. [1 ]
Chen S. [1 ]
Peng J. [1 ]
机构：
[1] Chongqing Key Laboratory of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing
[2] Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, 27695, NC
来源：
Zhang, Haibo (wdkyzl@gmail.com) | 2016年 / Science Press卷 / 38期
基金：
中国国家自然科学基金;
关键词：
Cluster; Femtocell networks; OFDMA; Resource allocation; Wireless communication;
D O I：
10.11999/JEIT150699
中图分类号：
学科分类号：
摘要：
Femtocell is a promising technology to enhance indoor coverage and system capacity. However, the co-tier and cross-tier interference impair greatly the network performance for spectrum-sharing OFDMA femtocell networks. To mitigate the co-tier/cross-tier interference, a cluster-based resource allocation algorithm is proposed. The proposed algorithm consists of two parts: In the first part, an improved Hungarian algorithm is first adopted to assign sub-channels to the Macro Users Equipments (MUEs). Then the averagely assigned power is reallocated in linear water-filling fashion in order to ensure the transmission of MUEs. In the other part, Simulated Annealing algorithm is first used to cluster femtocells into disjoint groups. Then under the condition of avoiding causing interference to MUEs, femtocells perform sub-channel and power allocation according to the rate requirements of Femtocell User Equipments (FUEs) to maximize spectrum efficiency. Simulation results show that the proposed algorithm not only guarantees the data rate requirements of users, but also improves the spectrum efficiency. © 2016, Science Press. All right reserved.
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页码：262 / 268
页数：6
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