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Interference Minimization in 5G Heterogeneous Networks

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Abstract

In this paper, we focus on one of the representative 5G network scenarios, namely multi-tier heterogeneous cellular networks. User association is investigated in order to reduce the down-link co-channel interference. Firstly, in order to analyze the multi-tier heterogeneous cellular networks where the base stations in different tiers usually adopt different transmission powers, we propose a Transmission Power Normalization Model (TPNM), which is able to convert a multi-tier cellular network into a single-tier network, such that all base stations have the same normalized transmission power. Then using TPNM, the signal and interference received at any point in the complex multi-tier environment can be analyzed by considering the same point in the equivalent single-tier cellular network model, thus significantly simplifying the analysis. On this basis, we propose a new user association scheme in heterogeneous cellular networks, where the base station that leads to the smallest interference to other co-channel mobile stations is chosen from a set of candidate base stations that satisfy the quality-of-service (QoS) constraint for an intended mobile station. Numerical results show that the proposed user association scheme is able to significantly reduce the down-link interference compared with existing schemes while maintaining a reasonably good QoS.

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Acknowledgments

The authors would like to acknowledge the support from the International Science & Technology Cooperation Program of China (Grant No. 2014DFA11640, 0903 and 2012DFG12250), the National Natural Science Foundation of China (NSFC) (Grant No. 61471180, 61271224 and 61301128), NSFC Major International Joint Research Project (Grant No. 61210002), the Hubei Provincial Science and Technology Department (Grant No. 2013CFB188 and 2013BHE005), the Fundamental Research Funds for the Central Universities (Grant No. 2013ZZGH009, 2013QN136, 2014TS100 and 2014QN155), the Special Research Fund for the Doctoral Program of Higher Education (Grant No. 20130142120044), and EU FP7-PEOPLE-IRSES (Contract/Grant No. 247083, 318992 and 610524). This research is also supported by Australian Research Council Discovery projects DP110100538 and DP120102030.

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Authors and Affiliations

  1. School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, China

    Tao Han, Qiang Li & Jing Zhang

  2. School of Computing and Communications, University of Technology Sydney, Australia National ICT Australia (NICTA), Sydney, Australia

    Guoqiang Mao

  3. Department of Information Science and Technology, Wenhua College, Wuhan, China

    Lijun Wang

Authors
  1. Tao Han
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  2. Guoqiang Mao
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  3. Qiang Li
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  4. Lijun Wang
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  5. Jing Zhang
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Correspondence to Qiang Li.

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Han, T., Mao, G., Li, Q. et al. Interference Minimization in 5G Heterogeneous Networks. Mobile Netw Appl 20, 756–762 (2015). https://doi.org/10.1007/s11036-014-0564-1

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  • DOI: https://doi.org/10.1007/s11036-014-0564-1

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