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Optimal Radius of Exclusion Zone for Dense Cognitive Small Cell Networks

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Abstract

Network densification via small cell deployments can enhance the network capacity in a cost-effective manner. Co-tier and cross-tier interferences form barriers to boost the network performance. In this paper, an interference coordination scheme with the aid of cognitive radio is proposed for dense small cell networks. Based on the theory of stochastic geometry, the network spectral efficiency is derived as a function of the radius of exclusion zone. Furthermore, the optimal radius of exclusion zone that maximizes system spectral efficiency is obtained by one-dimension searching. Simulation results show that the proposed interference coordination scheme with the optimal exclusion zone outperforms the existing ones in terms of system spectral efficiency.

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Acknowledgements

This work was supported in part by Natural Science Foundation of China (61801246), by China Postdoc Innovation Talent Supporting Program (BX20180143), by Natural Science Foundation of Jiangsu Province (BK20170910), by Natural Science Foundation of Jiangsu Higher Education Institutions (16KJB510035), and by Open Research Fund of Jiangsu Engineering Research Center of Communication and Network Technology, NUPT.

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Authors and Affiliations

  1. Jiangsu Engineering Research Center of Communication and Network Technology, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China

    Hong Wang

  2. Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong

    Hong Wang

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  1. Hong Wang
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Correspondence to Hong Wang.

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Wang, H. Optimal Radius of Exclusion Zone for Dense Cognitive Small Cell Networks. Wireless Pers Commun 103, 2977–2993 (2018). https://doi.org/10.1007/s11277-018-5988-7

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