On sum-rate maximization in CR-assisted heterogeneous LTE-LAA networks

Yi Feng Huang, Hsiao Hwa Chen

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

Abstract

Long Term Evolution - Licensed Assist Access (LTELAA) was proposed in 3GPP TR 36.889 to support unlicensed data access assisted by licensed spectrum. However, owing to wide applications of unlicensed wireless technologies such as WiFi, we need to deal with coexistence and collision issues. In traditional LBT protocol, LTE-LAA UE performs CCA to sense whether a channel is idle or not and wait until the channel becomes clear before transmission. In this way, LTE-LAA UE may suffer a low probability of successful first-trial transmission and need to schedule for retransmissions. To tackle this problem, we proposed a spectrum map assisted unlicensed resource allocation scheme for LTE-LAA SBSs to enhance successful transmission probability. Once LTE-LAA UEs have more opportunities to access the unlicensed channels, they can save cost for licensed resources and improve the overall spectrum utilization efficiency. Simulation results show that the proposed scheme can improve the sum rates of LTE-LAA SBS and LTE-A MBS, and significantly reduce channel collisions with other WiFi APs and LTE-LAA UEs.

Original languageEnglish
Title of host publication2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728109626
DOIs
Publication statusPublished - 2019 Dec
Event2019 IEEE Global Communications Conference, GLOBECOM 2019 - Waikoloa, United States
Duration: 2019 Dec 92019 Dec 13

Publication series

Name2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings

Conference

Conference2019 IEEE Global Communications Conference, GLOBECOM 2019
CountryUnited States
CityWaikoloa
Period19-12-0919-12-13

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Hardware and Architecture
  • Information Systems
  • Signal Processing
  • Information Systems and Management
  • Safety, Risk, Reliability and Quality
  • Media Technology
  • Health Informatics

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  • Cite this

    Huang, Y. F., & Chen, H. H. (2019). On sum-rate maximization in CR-assisted heterogeneous LTE-LAA networks. In 2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings [9013885] (2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/GLOBECOM38437.2019.9013885