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 Creators	ORCiD

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