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Downlink Subcarriers Required Analysis for Two-Hop OFDMA Cellular System

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Abstract

In Orthogonal frequency division multiple access (OFDMA) cellular system, the user at the different location of the cell requires different number of subcarriers to satisfy the user’s data rate requirement. In this paper, based on the Interference to Signal Ratio (ISR), we analyze the average number of downlink subcarriers required at inner and outer region for the two-hop OFDMA cellular system. Firstly we propose a two-hop OFDMA cellular system model. Then based on this model, we calculate the Cumulative Distribution Function of ISR at inner and outer region respectively, and obtain the theoretical analysis results for the average number of subcarriers required at two regions of the reference cell. Finally, with the help of the numerical calculation and Monte-Carlo simulations, we analyze the impact of the various parameters on the average number of subcarriers required of the two-hop cellular system. And the results are compared with the average number of subcarriers required of the one-hop cellular system.

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Acknowledgements

Foundation Items: The National Natural Science Foundation of China for Youth (61201160, 61602263); The Natural Science Foundation of Jiangsu Province (BK20131377, BK20151507, BK20160916); The Natural science fund for colleges and universities in Jiangsu Province under Grants (16KJB510034); A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (yx002001); The Jiangsu Overseas Research and Training Program for University Prominent Young and Middleaged Teachers and Presidents; Sponsored by NUPTSF (Grant Nos. NY212012, NY214065).

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Authors and Affiliations

  1. School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing, 210023, Jiangsu, China

    Weifeng Lu, Li Yang, Siguang Chen & Liwen He

  2. College of Internet of Things, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu, 210023, China

    Siguang Chen

  3. Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing, 210003, Jiangsu, China

    Weifeng Lu, Li Yang & Liwen He

  4. Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Nanjing, 210003, Jiangsu, China

    Weifeng Lu, Li Yang, Siguang Chen & Liwen He

Authors
  1. Weifeng Lu
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  2. Li Yang
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  3. Siguang Chen
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  4. Liwen He
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Correspondence to Weifeng Lu.

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Lu, W., Yang, L., Chen, S. et al. Downlink Subcarriers Required Analysis for Two-Hop OFDMA Cellular System. Wireless Pers Commun 95, 1811–1827 (2017). https://doi.org/10.1007/s11277-017-3995-8

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