![]() Use cases involve helping people navigate shopping malls, stadiums, conferences, or other suitably large venues. The RTT APIs in Android 9 and later allow any app to take advantage of indoor positioning. wifi triangulation, cell tower triangulation, and bluetooth beacons are just inherent to the underlying tech ( wifi / cellular / bluetooth ). Accuracy can be within 1 to 2 meters if a device is able to measure the distance to three or more access points. Google in the past explored beacons as an alternative, with its latest attempt at indoor positioning leveraging the IEEE 802.11mc Wi-Fi protocol. Location derived by GPS is not accurate in closed off, indoor settings. Wi-Fi Round Trip Time (RTT) allows the system and apps to “measure the distance to nearby RTT-capable Wi-Fi access points.” Google this week published a “WifiRttScan App” for developers through the Play Store. ![]() Android 9 Pie introduced support for indoor positioning by leveraging 802.11mc.
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