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UTILIZING MAGNETIC FIELD BASED NAVIGATION

  • US 20130310069A1
  • Filed: 06/26/2013
  • Published: 11/21/2013
  • Est. Priority Date: 01/11/2012
  • Status: Active Grant
First Claim
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1. An indoor location estimation and/or tracking system, comprising a cellular phone and a database server, each comprising at least one processor and at least one memory including a computer program code, wherein the respective at least one memory and the respective computer program code are configured, with the respective at least one processor, to cause the respective apparatus to perform specific actions,wherein the cellular phone is caused to:

  • perform Earth'"'"'s magnetic field, EMF, vector measurements in a building, wherein the EMF vector represents magnitude and direction of the earth'"'"'s magnetic field affected by the local structures of the building; and

    cause transmission of the measured EMF vectors to the database server wirelessly, wherein the database server stores an indoor EMF map comprising EMF vector strength and direction at any given location in the building, andwherein the database server is caused to;

    determine a location estimate of the cellular phone in the building on the basis of the received EMF vectors and the indoor EMF map; and

    communicate the location estimate to the cellular phone, thereby initializing the cellular phone with the location estimate.

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