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Enhancing 4G Co-existence with Wi-Fi/IoT using cognitive radio

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Abstract

The advanced cellular network, long term evolution (LTE) that presently operates in licensed spectrum has been extended to unlicensed LTE (U-LTE) to improve data rate and spectral efficiency by utilizing unlicensed spectrum. Carrier aggregation of 3GPPLTE-A supports the aggregation of licensed and unlicensed spectrum in small and femto cells to provide better user experience. The proposed work consists of two objectives, first to accomplish the listen-before-talk (LBT) regulatory requirement of radio communication in U-LTE and the second to enhance their co-existence with Wi-Fi/IoT users in a non-interference style by reducing the back-off rate of Wi-Fi. The importance of spectrum utilization by the incumbent users of unlicensed band for the upcoming Internet of Things communications is also a key consideration in this work. The recently evolved intelligent technology viz. Cognitive radio (CR) is applied in the proposed system model to meet the objectives. A ground research is done in a simulation environment of LTE signals and 5 GHz band to evaluate the back-off rate of Wi-Fi. A comparative performance analysis between proposed and existing systems are also done and presented in this paper.

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Authors and Affiliations

  1. Department of Computer Science and Engineering, PSG Institute of Technology and Applied Research, Coimbatore, India

    A. C. Sumathi

  2. Department of Information Technology, PSG College of Technology, Coimbatore, India

    R. Vidhyapriya

  3. Department of Computer Science and Engineering, SNS College of Engineering, Coimbatore, India

    C. Vivekanandan

  4. School of Computing Science and Engineering, VIT University, Vellore, India

    Arun Kumar Sangaiah

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  1. A. C. Sumathi
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  2. R. Vidhyapriya
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  3. C. Vivekanandan
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  4. Arun Kumar Sangaiah
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Correspondence to A. C. Sumathi.

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Sumathi, A.C., Vidhyapriya, R., Vivekanandan, C. et al. Enhancing 4G Co-existence with Wi-Fi/IoT using cognitive radio. Cluster Comput 22 (Suppl 5), 11295–11305 (2019). https://doi.org/10.1007/s10586-017-1383-5

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