OFDMA毫微微小区双层网络中基于分组的资源分配

doi:10.11999/JEIT150699

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Abstract

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.

Key words： Wireless communication Femtocell networks Resource allocation Cluster OFDMA

Received: 08 June 2015 Published: 04 December 2015

PACS:

TN929.5

Fund:

The National Natural Science Foundation of China (61301122), The Research Plan of Chongqing (cstc2014jcyjA 40052), The Research Program of Chongqing Municipal Education Commission (KJ1400405)

Corresponding Authors: ZHANG Haibo E-mail: wdkyzl@gmail.com

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	ZHANG Haibo
	MU Lixiong
	CHEN Shanxue
	PENG Jiaoyang

Cite this article:

ZHANG Haibo,MU Lixiong,CHEN Shanxue等. A Cluster-based Resource Allocation in a Two-tier OFDMA Femtocell Networks[J]. JEIT, 2016, 38(2): 262-268.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT150699 OR http://jeit.ie.ac.cn/EN/Y2016/V38/I2/262

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