Impact of hidden node problem in association and data transmission for LAA Wi-Fi coexistence

Sathya, Vanlin and Rochman, Muhammad Iqbal and Pasca, Thomas Valerian and Ghosh, Monisha (2022) Impact of hidden node problem in association and data transmission for LAA Wi-Fi coexistence. Computer Communications, 195. pp. 187-206. ISSN 0140-3664

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Abstract

Small-cell LTE and Wi-Fi networks has been globally deployed in the unlicensed 5 GHz bands, leading to the need for new coexistence regulations between two very different access technologies. To address coexistence challenges, 3GPP standardized LTE Licensed Assisted Access (LAA) in 5 GHz bands through the incorporation of similar sensing and back-off features. The success of LAA's fair and efficient coexistence with Wi-Fi can be considered a benchmark for collaborative cellular operation in unlicensed bands. In this paper, we discuss the hidden node scenario when T-Mobile LAA coexists with the Wi-Fi APs that we deployed at the Illinois Institute of Technology (IIT) university campus. In this setup, we observed problems on the Wi-Fi client association and inefficient data transmission when it tries to connect to its corresponding Wi-Fi APs. As LAA is unaware of the Wi-Fi AP's transmission (low transmission power received at LAA BS), LAA BS continuously transmits with maximum transmission opportunity time, thus highly impacting Wi-Fi performance. Further, the hidden node problem is modeled analytically capturing the root cause of inefficiency. © 2022 Elsevier B.V.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Article
Additional Information: We sincerely thank the Illinois Institute of Technology (IIT) campus authorities and departments for proving access in the campus property to conduct the realistic experiment. Partially supported by NSFCNs-1618920.
Uncontrolled Keywords: LAA; Spectrum sharing; Unlicensed; Wi-Fi
Subjects: Computer science
Divisions: Department of Computer Science & Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 13 Sep 2022 12:52
Last Modified: 13 Sep 2022 12:52
URI: http://raiith.iith.ac.in/id/eprint/10566
Publisher URL: http://doi.org/10.1016/j.comcom.2022.08.009
OA policy: https://v2.sherpa.ac.uk/id/publication/12498
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