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False Protection of Real-Time Traffic with Quieting in Heterogeneous Wi-Fi 7 Networks: An Experimental Study
Andrey Barannikov1, Ilya Levitsky1, Evgeny Khorov1
1Institute for Information Transmission Problems of the Russian Academy of Sciences, 127051 Moscow, Russia.
Sensors (Basel, Switzerland)
|November 14, 2023
Summary
Wi-Fi 7
Area of Science:
- Wireless networking
- Communication systems engineering
Background:
- Wi-Fi 7 introduces Restricted Target Wake Time (R-TWT) for real-time applications.
- Quiet Intervals are intended to protect R-TWT by restricting legacy device access.
Purpose of the Study:
- To experimentally validate the effectiveness of Quiet Intervals in protecting Wi-Fi 7's R-TWT mechanism.
- To identify inconsistencies between the Wi-Fi 7 standard and mass-market device implementations.
Main Methods:
- Experimental analysis of mass-market Wi-Fi devices.
- Testing the scheduling and enforcement of Quiet Intervals.
Main Results:
- Experimental results disprove the assumption that Quiet Intervals effectively protect R-TWT.
- Significant inconsistencies were found, including the inability to schedule multiple Quiet Intervals on widely used devices.
Conclusions:
- Quiet Intervals are not a reliable protection for R-TWT in heterogeneous networks with legacy devices.
- Addressing these inconsistencies is crucial for the successful deployment of Wi-Fi 7 R-TWT.
