Journal
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Volume 65, Issue 9, Pages 7593-7605Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVT.2015.2497315
Keywords
Average spatial capacity; intercell interference (ICI); max-min fairness; mobile communication system; partial frequency reuse (PFR)
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Funding
- National Natural Science Foundation of China [61501160]
- Fundamental Research Funds for the Central Universities of China [2015HGCH0013]
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Partial frequency reuse (PFR) is one of the key techniques to improving max-min fairness for cell-edge user equipment in the fourth generation of mobile communication systems. Recently, multilayer PFR schemes have been proposed, which are considered to be a promising evolution of this technique. In this paper, we propose an analytical framework for multilayer PFR scheme design, which uses a triplet to completely describe a given PFR scheme. Then, closed-form expressions of the average spatial capacities of certain typical regions of a cell are derived. Based on a comprehensive analysis using this framework, a novel multilayer PFR scheme is designed, which divides each cell into inner, middle, and outer layers, with two homolographic sublayers for the middle layer. Reuse factors for the three layers are 1, 3/2, and 3, respectively, and an orthogonal division of the spectrum among different layers is guaranteed. Based on our numerical results, this novel scheme outperforms the traditional two-layer PFR scheme in max-min fairness without degrading the average spatial capacity. Compared with several representative multilayer PFR schemes, it achieves a better tradeoff between these two metrics.
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