Patent ID: 11864056
Assignee: T-MOBILE USA, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. One or more non-transitory computer-readable media storing computer-executable instructions that upon execution cause one or more processors to perform acts comprising:
receiving, from a building footprint database, a developed fingerprint map that includes a plurality of collected reference data points on a navigated path, wherein the reference data points include stored wireless signal measurements and angular features that are associated with corresponding segments on the navigated path;
receiving, from a user device, a plurality of wireless signal measurements and an angular feature over multiple time steps;
determining a wireless signal similarity between the received wireless signal measurements and the stored wireless signal measurements;
determining a spatial similarity between the angular feature and the stored angular features;
detecting a revisiting of a segment on the navigated path based on the determined wireless signal similarity and spatial similarity; and
identifying an indoor location of the user device based on the detected revisited segment.