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Article overview
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Experimental Demonstration of Delay-Bounded Wireless Network Based on Precise Time Synchronization | | Haruaki Tanaka
; Yusuke Yamasaki
; Satoshi Yasuda
; Nobuyasu Shiga
; Kenichi Takizawa
; Nicolas Chauvet
; Ryoichi Horisaki
; Makoto Naruse
; | | Date: |
20 Jun 2022 | | Abstract: | Low latency and reliable information transfer are highly demanded in 5G and
beyond 5G wireless communications. However, the conventional media access
control (MAC) protocol for local wireless networks sometimes unexpectedly
yields significant delays due to its stochastic arbitration mechanism,
resulting in the incapability of limiting the maximum delay. In the meantime,
the latest precise time synchronization technology, especially wireless two-way
interferometry (Wi-Wi), paves a new way to overcome such fundamental
difficulties. Indeed, Yamasaki et al. proposed a new delay-bounded wireless MAC
protocol named Carrier Sense Multiple Access with Arbitration Point (CSMA/AP),
exploiting precise time synchronization among all devices in the network.
CSMA/AP enables collision-free and delay-bounded communications with a simple
autonomous arbitration mechanism, unlike conventional methods such as CSMA/CA.
The former study, however, was limited only to numerical examinations.
Experimental demonstration and verification in wireless environments are one of
the most critical steps. This paper experimentally demonstrates the fundamental
principles of CSMA/AP by constructing a star-topology wireless network using
software-defined radio terminals combined with precise time synchronization
devices. We show that CSMA/AP is successfully operated, including the dynamic
change of the spatial position of the terminal or the capability to accommodate
mobility, thanks to the real-time adaption to the dynamically changing
environment by Wi-Wi. We also experimentally confirm that the proposed CSMA/AP
principle cannot be executed without Wi-Wi, which validates the impact of
precise time synchronization. This study paves a way toward realizing
delay-bounded wireless communications for future low-latency and highly
reliable critical applications. | | Source: | arXiv, 2207.00158 | | Services: | Forum | Review | PDF | Favorites | |
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