Improving Effectiveness of Seamless Redundancy in Real Industrial Wi-Fi Networks

Reliability and determinism of Wi-Fi can be tangibly improved by means of seamless redundancy, to the point of making this technology suitable for industrial environments. As pointed out in recent papers, the most benefits can be achieved when no phenomena can simultaneously affect transmissions on...

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Bibliographic Details
Published in:IEEE transactions on industrial informatics 2018-05, Vol.14 (5), p.2095-2107
Main Authors: Cena, Gianluca, Scanzio, Stefano, Valenzano, Adriano
Format: Article
Language:English
Subjects:
Communications systems
Design guidelines
IEEE 802.11
Interference
Network reliability
parallel redundancy protocol (PRP)
Protocols
Redundancy
seamless redundancy
Software
Systems design
Unicast
Wi-Fi
wireless channel independence
Wireless communication
Wireless fidelity
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Summary:Reliability and determinism of Wi-Fi can be tangibly improved by means of seamless redundancy, to the point of making this technology suitable for industrial environments. As pointed out in recent papers, the most benefits can be achieved when no phenomena can simultaneously affect transmissions on all channels of a redundant link. In this paper, several aspects are analyzed which, if not properly counteracted, may worsen seamless redundancy effectiveness. Effects they cause on communication have been experimentally evaluated in real testbeds, which rely on commercial Wi-Fi devices. Then, practical guidelines are provided, which aim at preventing joint interference through a careful system design. Results show that measured communication quality can be made as good as expected in theory.
ISSN:1551-3203
1941-0050
DOI:10.1109/TII.2017.2759788