Joint Optimization of Channel Selection and Frame Scheduling for Coexistence of LTE and WLAN

Haneul Ko, Jaewook Lee, Sangheon Pack

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Recently, the interest in operating long term evolution (LTE) in unlicensed bands (i.e., LTE-U) has increased. However, since LTE does not sense for channel vacancy prior to transmissions, whereas a wireless local area network (WLAN) is based on carrier sensing multiple access, LTE interference severely degrades the performance of WLAN. To maximize the LTE throughput while maintaining fairness between LTE and WLAN, we formulate a joint optimization problem of channel selection and frame scheduling in LTE. As a practical solution of this problem, we propose a low-complexity heuristic algorithm called the sequential operation algorithm (SOA). Evaluation results demonstrate that SOA can achieve an LTE throughput comparable to that of the optimal solution, while maintaining fairness between LTE and WLAN by selecting appropriate channels and conducting effective frame scheduling.

Original languageEnglish
Pages (from-to)6481-6491
Number of pages11
JournalIEEE Transactions on Vehicular Technology
Issue number7
Publication statusPublished - 2018 Jul

Bibliographical note

Funding Information:
Manuscript received July 31, 2017; revised December 24, 2017; accepted February 10, 2018. Date of publication February 13, 2018; date of current version July 16, 2018. This work was supported in part by the National Research Foundation of Korea Grant funded by the Korean Government (MSIP) (No. 2017R1E1A1A01073742) and in part by ICT R&D program of MSIP/IITP (2014-044-006-004, Next Generation WLAN System with High Efficient Performance). The review of this paper was coordinated by Dr. P. Lin. (Corresponding author: Sangheon Pack.) H. Ko is with the Smart Quantum Communication Research Center, Korea University, Seoul 02841, South Korea, and also with the University of British Columbia, Vancouver, BC V6T 1Z4, Canada (e-mail:

Publisher Copyright:
© 1967-2012 IEEE.


  • LTE-unlicensed (LTE-U)
  • Unlicensed bands
  • coexistence
  • fairness
  • throughput
  • wireless local area network (WLAN)

ASJC Scopus subject areas

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


Dive into the research topics of 'Joint Optimization of Channel Selection and Frame Scheduling for Coexistence of LTE and WLAN'. Together they form a unique fingerprint.

Cite this