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Conference Paper
Achieving Fair Cell-Edge Performance: Low-Complexity Interference Coordination in OFDMA Networks
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- Authors
- Sunghyun Kim, Hye-Kyung Jwa, Jung-Mo Moon, Jee-Hyeon Na
- Issue Date
- 2018-02
- Citation
- International Conference on Advanced Communications Technology (ICACT) 2018, pp.6-11
- Language
- English
- Type
- Conference Paper
- Project Code
- 17HF1600, Development of 5G Mobile Communication Technologies for Hyper-connected smart services, Chung Hyun Kyu
- Abstract
- We propose a low-complexity downlink interference coordination algorithm in OFDMA networks. The algorithm aims to achieve high proportional fairness among cell-edge users, as the effects of inter-cell interference are most noticeable in cell-edge areas where users are interfered by signals from neighbor base-stations. We demonstrate that the performance of our algorithm is greater than that of a decentralized algorithm which aims at interference randomization. Our algorithm consists of two stages. In the first stage, it constructs a bipartite graph that describes which set of base-stations imposes significant interference on each cell-edge user. In the second stage, exploiting the structure of the constructed graph, it solves an optimization problem to attain high proportional fairness.
- KSP Keywords
- Bipartite graph, Coordination Algorithm, Decentralized algorithm, First stage, OFDMA networks, Optimization problem, Proportional Fairness, cell-edge users, downlink interference, inter-cell interference(ICI), interference coordination