LOCATION DETERMINATION USING FORMULA

• US 20120264460A1
• Filed: 06/29/2012
• Published: 10/18/2012
• Est. Priority Date: 04/15/2008
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Bush, Jeffrey Alan, Huang, Ronald Keryuan, Low, Daryl Mun-Kid, van der Merwe, Rudolph, Crandall, Richard Eugene, Carlisle, Patrick Block
• Granted Patent: US 8,514,816 B2
• Time in Patent Office: Days
• US Class Current: 455/457
• CPC Class Codes: G01S 5/0221 Receivers

Abstract

Among other disclosed subject matter, a method includes obtaining, in a mobile device, power information indicating a detected power of respective signals received from multiple transmitters. The method includes determining a location of the mobile device using a formula that uses: locations of the multiple transmitters, a first function of the power information and a second function of respective locations of the multiple transmitters. The method can include recording the determined location.

Claims

1. A method comprising:

obtaining, in a mobile device, power information indicating a detected power of respective signals received from a plurality of transmitters;

displaying a map on a display of the mobile device;

determining the location of the mobile device based at least in part on;

locations of the plurality of transmitters, a first function of the power information and a second function of respective locations of the plurality of transmitters; and

placing a first indicator on the map corresponding to the determined location and a second indicator indicating a determined certainty of the determined location.

2. A method comprising:

obtaining, in a mobile device, power information indicating a detected power of respective signals received from a plurality of transmitters;

determining a location of the mobile device based at least in part on;

locations of the plurality of transmitters, a first function of the power information and a second function of respective locations of the plurality of transmitters, wherein the location is determined based at least in part on a formula that depends on a log₁₀ of the detected power and a log₁₀ of a modeled transmitter power; and

placing, in response to the user input, a first indicator on the map corresponding to the determined location and a second indicator indicating a determined certainty of the determined location.