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Survey techniques for generating location fingerprint data

A fingerprint and reading technology, which is applied in the direction of service based on location information, data processing input/output process, electrical digital data processing, etc., can solve problems such as weak, unable to determine the position of GPS signal, and non-existence of GPS signal, etc., to achieve good results quality effect

Active Publication Date: 2015-09-30
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many locations, GPS signals may be non-existent, weak, or interfered, making it impossible to accurately determine location using the GPS functionality of a mobile device
For example, conventional mobile devices are often unable to determine location based on GPS signals when inside buildings or tunnels

Method used

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  • Survey techniques for generating location fingerprint data
  • Survey techniques for generating location fingerprint data
  • Survey techniques for generating location fingerprint data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Exemplary Static Survey

[0020] figure 1 is a diagram illustrating an exemplary stationary survey technique. Mobile device 102 may be a device that implements stationary survey features. Mobile device 102 may be located at location 104 and programmed to survey location 104 for populating a location fingerprint database.

[0021] Place 104 may be a space that pedestrians can enter. Place 104 may include one or more constraints that restrict movement of pedestrians in the space. These constraints may include, for example, map constraints (e.g., walls, railings, or partition partitions), pathway constraints (eg, pedestrians walking on a pathway defined by road signs will walk along that pathway), or pedestrian motion constraints (eg, pedestrian Inability to move faster than X mph or move vertically when not in stairs or elevators). Site 104 may be a physical structure. A physical structure may be closed (eg, an office building) or open (eg, a stadium). A space ma...

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PUM

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Abstract

Surveying techniques for generating location fingerprint data are described. A mobile device can survey a venue by measuring, at multiple locations at the venue, signals from one or more signal sources. At each location, the mobile device can take multiple measurements of signals. The mobile device can take each measurement at a distinct orientation. The measurements can be used to determine expected measurements of the signals at the venue. Differences between the multiple measurements of signals can be used to determine a variance of the expected measurements. The expected measurements and variance can be designated as location fingerprint data for the venue. The location fingerprint data can be used by mobile devices for determining a location at the venue.

Description

technical field [0001] This disclosure generally relates to location determination. Background technique [0002] Some mobile devices have features for determining geographic location. For example, a mobile device may include a receiver for receiving signals from a global satellite system (eg, Global Positioning System or GPS). A mobile device can use received GPS signals to determine a geographic location, including latitude and longitude. In many locations, GPS signals may be non-existent, weak or interfered, making it impossible to accurately determine location using the GPS functionality of a mobile device. For example, conventional mobile devices are often unable to determine location based on GPS signals while inside buildings or tunnels. Contents of the invention [0003] This invention describes survey techniques for generating location fingerprint data. A mobile device may investigate a location by measuring signals from one or more signal sources at multiple ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02H04W4/021H04W4/38
CPCH04W4/04G06F3/048H04M1/00G01S5/0252G01S5/02525H04W64/00H04W4/021H04W4/027H04W4/38G01C21/206H04W48/16H04W88/02H04W88/08
Inventor L·M·马蒂R·梅厄S·M·马
Owner APPLE INC