Harmonious Cross-Technology Coexistence with Heterogeneous Traffic in Unlicensed Bands: Analysis and Approximations

Hirzallah, M; Krunz, M; Xiao, Y

Harmonious Cross-Technology Coexistence with Heterogeneous Traffic in Unlicensed Bands: Analysis and Approximations

Hirzallah, M Krunz, M Xiao, Y

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Publication Type:: Journal Article
Citation:: IEEE Transactions on Cognitive Communications and Networking, 2019
Issue Date:: 2019-01-01

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Field	Value	Language
dc.contributor.author	Hirzallah, M	en_US
dc.contributor.author	Krunz, M	en_US
dc.contributor.author	Xiao, Y	en_US
dc.date.accessioned	2020-04-04T19:59:41Z
dc.date.available	2020-04-04T19:59:41Z
dc.date.issued	2019-01-01	en_US
dc.identifier.citation	IEEE Transactions on Cognitive Communications and Networking, 2019	en_US
dc.identifier.uri	http://hdl.handle.net/10453/139798
dc.description.abstract	IEEE The dramatic growth in demand for mobile data has prompted mobile network operators (MNOs) to explore spectrum sharing in unlicensed bands. MNOs have been allowed recently to operate their LTE services over the 5 GHz Unlicensed National Information Infrastructure (U-NII) bands, currently occupied by Wi-Fi. The unlicensed LTE operation has been standardized by 3GPP under the name Licensed Assisted Access (LAA). Unlicensed 5G New radio (NR) operation over the U-NII bands, a.k.a., NR-Unlicensed (NR-U), is also being explored. To support applications with diverse quality of service requirements, LAA, NR-U, and Wi-Fi technologies offer multiple priority classes with different contention parameters for accessing an unlicensed channel. How these different classes affect the interplay between coexisting MNOs and Wi-Fi systems is still a relatively under-explored topic. In this paper, we develop a simple yet efficient framework for fair coexistence between LTE MNOs and Wi-Fi systems, each with multiple priority classes. We derive approximate closed-form solutions for the probability of successful transmission (PST), average contention delay, and average throughput under different LAA and Wi-Fi priority classes. LTE and Wi-Fi operators can fit these solutions to offline and/or online measurements, and use them to further optimize their system throughput and latency. Our results reveal that PSTs computed with our approximate models are within 5% of these obtained via simulation under dense network deployments and high traffic loads.	en_US
dc.relation.ispartof	IEEE Transactions on Cognitive Communications and Networking	en_US
dc.relation.isbasedon	10.1109/TCCN.2019.2934108	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Harmonious Cross-Technology Coexistence with Heterogeneous Traffic in Unlicensed Bands: Analysis and Approximations	en_US
dc.type	Journal Article
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
pubs.publication-status	Published	en_US

Abstract:

IEEE The dramatic growth in demand for mobile data has prompted mobile network operators (MNOs) to explore spectrum sharing in unlicensed bands. MNOs have been allowed recently to operate their LTE services over the 5 GHz Unlicensed National Information Infrastructure (U-NII) bands, currently occupied by Wi-Fi. The unlicensed LTE operation has been standardized by 3GPP under the name Licensed Assisted Access (LAA). Unlicensed 5G New radio (NR) operation over the U-NII bands, a.k.a., NR-Unlicensed (NR-U), is also being explored. To support applications with diverse quality of service requirements, LAA, NR-U, and Wi-Fi technologies offer multiple priority classes with different contention parameters for accessing an unlicensed channel. How these different classes affect the interplay between coexisting MNOs and Wi-Fi systems is still a relatively under-explored topic. In this paper, we develop a simple yet efficient framework for fair coexistence between LTE MNOs and Wi-Fi systems, each with multiple priority classes. We derive approximate closed-form solutions for the probability of successful transmission (PST), average contention delay, and average throughput under different LAA and Wi-Fi priority classes. LTE and Wi-Fi operators can fit these solutions to offline and/or online measurements, and use them to further optimize their system throughput and latency. Our results reveal that PSTs computed with our approximate models are within 5% of these obtained via simulation under dense network deployments and high traffic loads.

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http://hdl.handle.net/10453/139798