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Distributed Resource Allocation for Multi-cell Cooperative OFDMA Networks with Decode-and-Forward Relaying

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Abstract

In this paper, the downlink resource allocation is investigated for multi-cell cellular OFDMA networks with relaying, and a low-complexity distributed scheme is proposed. The target is to maximize the system weighted sum rate as well as provide fair services for each class of users. The problem is formulated as a mixed integer programming with the individual power constraints of the base station and relay station. The iterative multilevel water-filling is exploited in the power allocation in each cell, and different cells interact and cooperative with one another implicitly, which reduces the signal overhead and the computational complexity. Furthermore, subcarrier pairing and grouping are also discussed to enhance the system throughput or reduce the signaling overhead. Simulation results show that the algorithm converges fast, and outperforms some traditional schemes in terms of system throughput, and achieves fair and ubiquitous data coverage for heterogeneous users.

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Notes

  1. From the limit-theory viewpoint, any variable can be treated as a constant if the time-window is narrow enough.

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Acknowledgments

This work is supported by National Natural Science Foundation of China (61571234, 61401225), National Basic Research Program of China (973 Program: 2013CB329005), 863 Program: 2014AA01A705 and Jiangsu Provincial National Science Foundation (BK20140894).

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  1. Nanjing University of Posts and Telecommunications, Nanjing, 210003, Jiangsu, China

    Linshu Lv, Qi Zhu & Guangjun Liang

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  1. Linshu Lv
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  2. Qi Zhu
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  3. Guangjun Liang
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Correspondence to Qi Zhu.

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Lv, L., Zhu, Q. & Liang, G. Distributed Resource Allocation for Multi-cell Cooperative OFDMA Networks with Decode-and-Forward Relaying. Wireless Pers Commun 89, 1355–1370 (2016). https://doi.org/10.1007/s11277-016-3324-7

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  • DOI: https://doi.org/10.1007/s11277-016-3324-7

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