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Positioning system for determining the location of a device

  • US 9,903,935 B2
  • Filed: 01/02/2015
  • Issued: 02/27/2018
  • Est. Priority Date: 01/07/2014
  • Status: Active Grant
First Claim
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1. A wireless device having a physical location, the wireless device comprising:

  • a wireless interface for communicating with a network of reference nodes, each being located at a respective set of physical coordinates; and

    a location module configured to obtain a measurement of a respective signal communicated between the wireless interface and each of a plurality of said reference nodes, and to be supplied with a respective set of transformed time-varying coordinates for each of said plurality of reference nodes, transformed relative to the physical coordinates;

    wherein the location module is configured, using said signal measurements and the transformed time-varying coordinates of said plurality of reference nodes, to submit information indicative of a transformed location of the wireless device to an interpretation function, and to thereby access functionality relating to the physical location of the wireless device, andwherein the location module is configured to receive a respective identifier from each of said plurality of reference nodes, and to be supplied with the transformed time-varying coordinates from a server by submitting the identifiers to the server and receiving the respective sets of transformed coordinates back in response.

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