A Gradient Projection Based Self-Optimizing Algorithm for Inter-cell Interference Coordination in Downlink OFDMA Networks

Xuena Li; Hao Jin; Jiamo Jiang; Shibo Hou; Mugen Peng; Gongpu Wang

Research Article

A Gradient Projection Based Self-Optimizing Algorithm for Inter-cell Interference Coordination in Downlink OFDMA Networks

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1109/ChinaCom.2012.6417551,
    author={Xuena Li and Hao Jin and Jiamo Jiang and Shibo Hou and Mugen Peng and Gongpu Wang},
    title={A Gradient Projection Based Self-Optimizing Algorithm for Inter-cell Interference Coordination in Downlink OFDMA Networks},
    proceedings={International Workshop on SON},
    publisher={IEEE},
    proceedings_a={SON},
    year={2012},
    month={10},
    keywords={inter-cell interference coordination (icic) self-optimizing orthogonal frequency division multiple access (ofdma) networks fractional frequency reuse (ffr)},
    doi={10.1109/ChinaCom.2012.6417551}
}

Xuena Li
Hao Jin
Jiamo Jiang
Shibo Hou
Mugen Peng
Gongpu Wang
Year: 2012
A Gradient Projection Based Self-Optimizing Algorithm for Inter-cell Interference Coordination in Downlink OFDMA Networks
SON
IEEE
DOI: 10.1109/ChinaCom.2012.6417551

Xuena Li¹^,*, Hao Jin¹, Jiamo Jiang¹, Shibo Hou¹, Mugen Peng¹, Gongpu Wang²

1: Beijing University of Posts and Telecommunications
2: School of Computer and information technology, Beijing Jiaotong University

*Contact email: lixuena332@gmail.com

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.

Keywords: inter-cell interference coordination (icic) self-optimizing orthogonal frequency division multiple access (ofdma) networks fractional frequency reuse (ffr)

Published: 2012-10-25
Publisher: IEEE

: http://dx.doi.org/10.1109/ChinaCom.2012.6417551