Delay-Bounded Wireless Network Based on Precise Time Synchronization Using Wireless Two-Way Interferometry

Yusuke Yamasaki; Nicolas Chauvet; Nobuyasu Shiga; Satoshi Yasuda; Kenichi Takizawa; Ryoichi Horisaki; Makoto Naruse

doi:10.1109/ACCESS.2021.3087866

IEEE Access (Jan 2021)

Delay-Bounded Wireless Network Based on Precise Time Synchronization Using Wireless Two-Way Interferometry

Yusuke Yamasaki,
Nicolas Chauvet,
Nobuyasu Shiga,
Satoshi Yasuda,
Kenichi Takizawa,
Ryoichi Horisaki,
Makoto Naruse

Affiliations

Yusuke Yamasaki: ORCiD; Department of Information Physics and Computing, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan
Nicolas Chauvet: ORCiD; Department of Information Physics and Computing, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan
Nobuyasu Shiga: ORCiD; Space-Time Standards Laboratory, Electromagnetic Standards Research Center, Radio Research Institute, National Institute of Information and Communications Technology, Koganei, Japan
Satoshi Yasuda: Space-Time Standards Laboratory, Electromagnetic Standards Research Center, Radio Research Institute, National Institute of Information and Communications Technology, Koganei, Japan
Kenichi Takizawa: Sustainable ICT System Laboratory, Resilient ICT Research Center, Network Research Institute, National Institute of Information and Communications Technology, Sendai, Japan
Ryoichi Horisaki: Department of Information Physics and Computing, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan
Makoto Naruse: Department of Information Physics and Computing, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan

DOI: https://doi.org/10.1109/ACCESS.2021.3087866
Journal volume & issue: Vol. 9
pp. 85084 – 85100

Abstract

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The importance of reliable information transfer in wireless networks, especially regarding communication delay, is drastically increasing to fulfill safe and high-quality communication in the 5G and post-5G era. However, conventional media access control (MAC) protocol for wireless networks, notably Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA), sometimes yields unexpectedly significant delay due to its complex arbitration mechanism assuming asynchronous communication among terminals. As the delay cannot be strictly bounded by a deterministic value, this causes a vulnerability of systems relying on wireless networks. This paper utilizes precise time synchronization achieved by Wireless Two-way Interferometry (Wi-Wi), enabling all terminals to be time-synchronized via wireless signals. We show that by an appropriate periodic assignment of each terminal’s data transmission timing, named Arbitration Point (AP), a simple arbitration algorithm obtains a strictly bounded maximum value for the delay while ensuring equalities among all participants. Furthermore, we demonstrate that the total number of terminals manageable in a star-topology wireless network significantly increases by densely packing AP timings, taking into account the spatial geometry information of terminals, which is another feature delivered by Wi-Wi measurement. In the meantime, we experimentally constructed a star-topology wired network where all terminals are time-synchronized via Wi-Wi to confirm the fundamental properties identified in the proposed arbitration protocol. This study paves a new way for future wireless networks where the delay is strictly bounded and provides the basis for ultra-reliable and high-quality information transfer functionalities by utilizing precise time synchronization and space localization (space-time synchronization).

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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