NDLI: A gradient projection based self-optimizing algorithm for inter-cell interference coordination in downlink OFDMA networks

Content Provider	IEEE Xplore Digital Library
Author	Xuena Li Hao Jin Jiamo Jiang Shibo Hou Mugen Peng Gongpu Wang
Copyright Year	2012
Description	Author affiliation: Wireless Signal Processing and Network Laboratory, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, 100876, China (Xuena Li; Hao Jin; Jiamo Jiang; Shibo Hou; Mugen Peng) \|\| School of Computer and information technology, Beijing Jiaotong University, China (Gongpu Wang)
Abstract	Fractional frequency reuse (FFR) is an inter-cell interference coordination (ICIC) scheme wherein the whole bandwidth is divided into regions using different frequency reuse factors in orthogonal frequency division multiple access (OFDMA) networks. However, it is hard to achieve the balance of cell-edge and cell-center user throughput in practice as all base stations (BS) are configured with static transmission power for each sub-band in traditional FFR. To solve this problem, a gradient projection based self-optimizing (GPB-SO) algorithm for ICIC is proposed to adjust transmission power of each sub-bands set by exchanging the gradient direction information, aiming to maximize the overall network utility. Furthermore, a closed-form of gradient direction is attained to update the transmission power of each BS in a distributed manner. With the simulation results, it is demonstrated that the proposed algorithm not only provides a better tradeoff between spectrum efficiency and cell-edge user throughput, but also increases the system energy efficiency due to interference reduction.
Starting Page	586
Ending Page	590
File Size	147562
Page Count	5
File Format	PDF
ISBN	9781467326988
e-ISBN	9781467326995
e-ISBN	9781467326971
DOI	10.1109/ChinaCom.2012.6417551
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-08
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless communication Orthogonal Frequency Division Multiple Access (OFDMA) networks Fractional frequency reuse (FFR) OFDM inter-cell interference coordination (ICIC) Interference Bandwidth self-optimizing Throughput Downlink Optimization
Content Type	Text
Resource Type	Article

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