Invention Grant
- Patent Title: Location fingerprinting for a transit system
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Application No.: US14502746Application Date: 2014-09-30
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Publication No.: US10757671B2Publication Date: 2020-08-25
- Inventor: David Benjamin Millman , Johan Olav Bergerengen , Robert Mayor , Brian Stephen Smith
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Jaffery Watson Mendonsa & Hamilton LLP
- Main IPC: H04W24/00
- IPC: H04W24/00 ; H04W64/00 ; H04L29/08 ; H04W4/02 ; H04W24/10 ; G01S5/02 ; H04W4/80

Abstract:
Methods, program products, and systems for using multiple sensors to determine a location fingerprint are described. A sampling device can measure RF signals detected at a train station of a transit system or a route of the transit system. The sampling device, or a location server receiving the measurements, can filter RF signal measurements using one or more readings from sensors coupled to the sampling device and that are different from RF receivers. The readings can be taken concurrently with the RF signal measurements. These readings, designated as motion cues, can include motion sensor readings, barometer readings, or magnetometer readings. Using the motion cues, the sampling device or location server can distinguish different platforms of a station of the transit system and different levels of the station, or filter out RF signal measurements that may have been inaccurate, e.g., as caused by disturbances from a train entering or leaving a station.
Public/Granted literature
- US20160094954A1 LOCATION FINGERPRINTING USING MULTIPLE SENSORS Public/Granted day:2016-03-31
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