Enhancing LAA/Wi-Fi Coexistence via Concurrent Transmissions and Interference Cancellation

Zhiwu Guo, Ming Li, Yong Xiao

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

1 Scopus citations

Abstract

With the rapid growth of mobile devices and popularity for data-intensive services, LTE Licensed-Assisted Access (LAA) has been proposed to allow coexistence of LTE and Wi-Fi in 5 GHz unlicensed band. Most existing works have been focusing on developing collision avoidance mechanisms to ensure the harmonious coexistence between Wi-Fi and LTE. In this paper, we argue that simply avoiding possible collisions caused by simultaneous transmissions does not fully utilize the unlicensed spectrum. We derive the optimal CCA threshold that enables as many simultaneous transmissions between coexisting LTE and Wi-Fi as possible and exploit successive interference cancellation to further increase the chance of concurrent transmissions. We introduce a Markov-model based approach to quantity the impact of energy detection, concurrent transmission and successful decoding probability on the throughput expressions of LAA and Wi-Fi. Extensive simulations have been presented to validate our proposed theoretical model. Our results show the throughput of Wi-Fi and LAA can be significantly improved under several typical coexistence scenarios.

Original languageEnglish (US)
Title of host publication2019 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728123769
DOIs
StatePublished - Nov 2019
Externally publishedYes
Event2019 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2019 - Newark, United States
Duration: Nov 11 2019Nov 14 2019

Publication series

Name2019 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2019

Conference

Conference2019 IEEE International Symposium on Dynamic Spectrum Access Networks, DySPAN 2019
Country/TerritoryUnited States
CityNewark
Period11/11/1911/14/19

ASJC Scopus subject areas

  • Hardware and Architecture
  • Safety, Risk, Reliability and Quality
  • Computer Networks and Communications

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