BuSAR: Bluetooth Slot Availability Randomization for Better Coexistence with Dense Wi-Fi Networks

Chenglong Shao, Heejun Roh, Wonjun Lee

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    The last decade has witnessed the ever-increasing deployment of Wi-Fi networks and the explosion of Bluetooth-based applications. As a result, the coexistence of Bluetooth piconets with highly-dense Wi-Fi networks is a common phenomenon currently. Unlike Wi-Fi that conducts carrier sensing before channel access, Bluetooth adopts frequency hopping based on a predefined hop sequence, which inevitably incurs considerable cross-technology interference to Wi-Fi. While the Adaptive Frequency Hopping technique is standardized for interference reduction, it does not perform well in current practice where densely-deployed Wi-Fi networks commonly cover the whole 2.4 GHz unlicensed spectrum. In this context, this article presents BuSAR, a novel approach to account for the coexistence problem between Bluetooth piconets and dense Wi-Fi networks. BuSAR embodies the first work to aim at mitigating the cross-technology interference between Bluetooth and highly-dense Wi-Fi networks in a distributed manner. At the heart of BuSAR lies a subtle technique called Bluetooth slot availability randomization, which exploits the redundancy of erroneous Bluetooth packets for better Bluetooth/Wi-Fi coexistence. With BuSAR adopted, multiple Bluetooth piconets are guaranteed to operate independently and only a lightweight algorithm is needed to be implemented at each Bluetooth device. Both theoretical analysis and experimental results validate the feasibility and superiority of BuSAR.

    Original languageEnglish
    Article number8910458
    Pages (from-to)846-860
    Number of pages15
    JournalIEEE Transactions on Mobile Computing
    Volume20
    Issue number3
    DOIs
    Publication statusPublished - 2021 Mar 1

    Bibliographical note

    Publisher Copyright:
    © 2002-2012 IEEE.

    Keywords

    • Wi-Fi
    • bluetooth
    • coexistence
    • cross-technology interference
    • frequency hopping
    • randomization

    ASJC Scopus subject areas

    • Software
    • Computer Networks and Communications
    • Electrical and Electronic Engineering

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