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

12 Citations (Scopus)

Abstract

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
Volume67
Issue number7
DOIs
Publication statusPublished - 2018 Jul

Keywords

  • 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

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