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Location-transmitting device for determining location of a wireless communication device

  • US 10,136,258 B2
  • Filed: 01/22/2018
  • Issued: 11/20/2018
  • Est. Priority Date: 05/20/2011
  • Status: Active Grant
First Claim
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1. A method performed under control of a wireless communication device, the method comprising:

  • receiving, using a short-range radio communication protocol and absent prior interrogation, radio signals from a plurality of nearby autonomously transmitting radio-transmitting devices;

    detecting, by the wireless communication device, location data in a radio signal from a nearby autonomously transmitting radio-transmitting device of the plurality of nearby autonomously transmitting radio-transmitting devices, wherein the radio signal is a strongest radio signal, among the radio signals, that includes the location data;

    retaining, by the wireless communication device, the location data from the nearby autonomously transmitting radio-transmitting device, wherein retaining the location data comprises retaining the location data until the wireless communication device detects another location data from a different nearby autonomously transmitting radio-transmitting device;

    estimating a distance of the wireless communication device from the nearby autonomously transmitting radio-transmitting device based on a received signal level of the radio signal; and

    transmitting, by the wireless communication device, the retained location data and data, which represents the estimated distance, to a third party.

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