A Fair Listen-Before-Talk Algorithm for Coexistence of LTE-U and WLAN

Haneul Ko, Jaewook Lee, Sangheon Pack

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)


Recently, there has been an increasing interest in operating long-term evolution (LTE) in unlicensed bands (i.e., LTE-U). However, since LTE and wireless local area networks (WLANs) are designed to operate in different bands, they have no coexistence mechanism, which leads to significant performance degradation. In particular, since LTE does not sense channel vacancy prior to transmissions, the LTE interference severely affects the WLAN operation. To address this problem, we propose a fair listen-before-talk (F-LBT) algorithm for coexistence of LTE-U and WLAN in unlicensed bands. F-LBT jointly considers the total system throughput and the fairness between LTE-U and WLAN and then allocates an appropriate idle period for WLAN. Evaluation results demonstrate that F-LBT can improve the total system throughput while providing the fairness between LTE-U and WLAN.

Original languageEnglish
Article number7419263
Pages (from-to)10116-10120
Number of pages5
JournalIEEE Transactions on Vehicular Technology
Issue number12
Publication statusPublished - 2016 Dec

Bibliographical note

Publisher Copyright:
© 2016 IEEE.


  • Coexistence
  • LTE-unlicensed (LTE-U)
  • discrete-time Markov chain (DTMC)
  • fairness
  • listen before talk (LBT)
  • throughput
  • unlicensed bands

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


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