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Cluster Computing

, Volume 22, Supplement 5, pp 11295–11305 | Cite as

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

  • A. C. SumathiEmail author
  • R. Vidhyapriya
  • C. Vivekanandan
  • Arun Kumar Sangaiah
Article
  • 292 Downloads

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.

Keywords

LTE U-LTE Cognitive radio Carrier aggregation Coexistence issues IoT communications-5 GHz band 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of Computer Science and EngineeringPSG Institute of Technology and Applied ResearchCoimbatoreIndia
  2. 2.Department of Information TechnologyPSG College of TechnologyCoimbatoreIndia
  3. 3.Department of Computer Science and EngineeringSNS College of EngineeringCoimbatoreIndia
  4. 4.School of Computing Science and EngineeringVIT UniversityVelloreIndia

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