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Determining wireless device locations

  • US 6,618,005 B2
  • Filed: 06/29/2001
  • Issued: 09/09/2003
  • Est. Priority Date: 06/29/2001
  • Status: Expired due to Term
First Claim
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1. A system, comprising:

  • first, second and third wireless access points, each to include synchronized time information derived from a common time base and an interface to transmit digital data to a wireless mobile device and to receive digital data and a ping signal from the wireless mobile device; and

    a processing device coupled to the first, second and third wireless access points through communications links to receive data on when the ping signal was received at each of the first, second and third wireless access points and to derive positional information on the wireless mobile device from the data.

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