On Modeling and Optimizing LTE/Wi-Fi Coexistence with Prioritized Traffic Classes

Mohammed Hirzallah, Yong Xiao, Marwan M Krunz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

The dramatic growth in demand for mobile data service has prompted mobile network operators (MNOs) to explore new spectrum resources in unlicensed bands. MNOs have been recently allowed to extend LTE-based service called LTE-LAA over 5 GHz U-NII bands, currently occupied by Wi-Fi. To support applications with diverse QoS requirements, both LTE and Wi-Fi technologies introduce multiple priority classes with different channel contention parameters for accessing unlicensed bands. How these different priority classes affect the interplay between coexisting LTE and Wi-Fi technologies is still relatively under explored. In this paper, we develop a simple and efficient framework that helps MNOs assess the fair coexistence between MNOs and Wi-Fi operators with prioritized channel access under multi-channel setting. We derive an approximated close-form solution for each MNO to pre-evaluate the probability of successful transmission (PST), average contention delay, and average throughput when adopting different priority classes to serve different traffics. MNOs and Wi-Fi operators can fit our model using measurements collected offline and/or online, and use it to further optimize their systems' throughput and latency. Our results reveal that PSTs computed with our approximated closed-form model approach those collected from system-level simulations with around 95% accuracy under scenarios of dense network deployment density and high traffic intensity.

Original languageEnglish (US)
Title of host publication2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538651919
DOIs
StatePublished - Jan 11 2019
Event2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018 - Seoul, Korea, Republic of
Duration: Oct 22 2018Oct 25 2018

Publication series

Name2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018

Conference

Conference2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018
CountryKorea, Republic of
CitySeoul
Period10/22/1810/25/18

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture

Cite this

Hirzallah, M., Xiao, Y., & Krunz, M. M. (2019). On Modeling and Optimizing LTE/Wi-Fi Coexistence with Prioritized Traffic Classes. In 2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018 [8610465] (2018 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/DySPAN.2018.8610465