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Mobile-assisted network based techniques for improving accuracy of wireless location system

  • US 6,463,290 B1
  • Filed: 10/03/2000
  • Issued: 10/08/2002
  • Est. Priority Date: 01/08/1999
  • Status: Expired due to Term
First Claim
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1. A method for use in a Wireless Location System (WLS) in locating a mobile wireless telephone, including a wireless telephone or other type of transmitter, comprising:

  • a) receiving normal transmission parameters from a base station;

    b) initiating a call on the wireless telephone by pressing a sequence of keys;

    c) comparing the sequence of keys with a trigger event stored within the mobile wireless telephone; and

    d) if the sequence of keys matches the trigger event, then employing a modified transmission sequence for completing the call with the mobile wireless telephone.

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