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Performance Analysis for Caching in Multi-tier IoT Networks with Joint Transmission

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6GN for Future Wireless Networks (6GN 2020)

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Abstract

The rapid growth of the number of IoT devices in the network has brought huge traffic pressure to the network. Caching at the edge has been regarded as a promising technique to solve this problem. However, how to further improve the successful transmission probability (STP) in cache-enabled multi-tier IoT networks (CMINs) is still an open issue. To this end, this paper proposes a base station (BS) joint transmission scheme in CMIN where the nearest BS that stores the requested files in each tier is selected to cooperatively serve the typical UE. Based on the proposed scheme, we derive an integral expression for the STP, and optimize the content caching strategy for a two-tier network case. The gradient projection method is used to solve the optimization problem, and a locally optimal caching strategy (LCS) is obtained. Numerical simulations show that the LCS achieves a significant gain in STP over three comparative baseline strategies.

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Authors and Affiliations

  1. Harbin Institute of Technology, Harbin, 150001, China

    Tianming Feng, Shuo Shi & Xuemai Gu

  2. Huizhou Engineering Vocational College, Huizhou, 516023, China

    Zhenyu Xu

Authors
  1. Tianming Feng
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  2. Shuo Shi
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  3. Xuemai Gu
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  4. Zhenyu Xu
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Corresponding author

Correspondence to Shuo Shi .

Editor information

Editors and Affiliations

  1. College of Intelligence and Computing, Tianjin University, Tianjin, Tianjin, China

    Xiaofei Wang

  2. Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC, Canada

    Victor C. M. Leung

  3. School of Computer Science and Technology, Tianjin University, Tianjin, Tianjin, China

    Keqiu Li

  4. University of Science and Technology, Beijing, China

    Haijun Zhang

  5. Shenzhen University, Shenzhen, China

    Xiping Hu

  6. National University of Defense Technology, Changsha, China

    Qiang Liu

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© 2020 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Feng, T., Shi, S., Gu, X., Xu, Z. (2020). Performance Analysis for Caching in Multi-tier IoT Networks with Joint Transmission. In: Wang, X., Leung, V.C.M., Li, K., Zhang, H., Hu, X., Liu, Q. (eds) 6GN for Future Wireless Networks. 6GN 2020. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 337. Springer, Cham. https://doi.org/10.1007/978-3-030-63941-9_26

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  • DOI: https://doi.org/10.1007/978-3-030-63941-9_26

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-63940-2

  • Online ISBN: 978-3-030-63941-9

  • eBook Packages: Computer ScienceComputer Science (R0)

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