Is Wi-Fi RTT the Next Big Thing for Indoor Location?

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By Mark Qi | 2Q 2022 | IN-6548

 

Ubiquitous Wi-Fi Infrastructure for Indoor Positioning

NEWS


The IEEE 802.11mc standard, published in 2016, introduced a new positioning technique for Wi-Fi enabled devices. Superior to existing Received Signal Strength Indicator (RSSI)-based methods, Wi-Fi positioning estimated using Round Trip Time (RTT) leverages Fine Time Measurement (FTM), a feature supported in a select number of Wi-Fi Access Points (APs) from Aruba and Google, as well as newer Android devices, helping to achieve positioning accuracies between one and two meters. Further improvements in Wi-Fi positioning accuracy, as well as features such as ranging are expected with the release of the IEEE 802.11az standard later this year, are bringing Wi-Fi positioning closer in line with other competitive indoor positioning technologies.

Wi-Fi Positioning in the Larger Location Ecosystem

IMPACT


With Global Navigation Satellite System (GNSS) positioning not able to function under a roof, alternative solutions are needed for indoor positioning and navigation. Wayfinding in public spaces such as shopping centers, t…

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