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

Authors
Shao, ChenglongRoh, HeejunLee, Wonjun
Issue Date
1-3월-2021
Publisher
IEEE COMPUTER SOC
Keywords
Wireless fidelity; Interference; Bluetooth; Mobile computing; Kernel; Protocols; Wi-Fi; bluetooth; coexistence; cross-technology interference; frequency hopping; randomization
Citation
IEEE TRANSACTIONS ON MOBILE COMPUTING, v.20, no.3, pp.846 - 860
Indexed
SCIE
SCOPUS
Journal Title
IEEE TRANSACTIONS ON MOBILE COMPUTING
Volume
20
Number
3
Start Page
846
End Page
860
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/49494
DOI
10.1109/TMC.2019.2955080
ISSN
1536-1233
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.
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