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Method and apparatus for enhanced 911 location using power control in a wireless system

  • US 6,404,388 B1
  • Filed: 01/21/2000
  • Issued: 06/11/2002
  • Est. Priority Date: 01/21/2000
  • Status: Expired due to Term
First Claim
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1. A method of locating a mobile telephone, comprising the steps of:

  • receiving at a base station a call from a mobile telephone, the call including a dialed number and a TDMA signal;

    transmitting from the base station to the mobile telephone a control message, in response to the dialed number meeting a predetermined criterion, the control message instructing the mobile telephone to transmit the TDMA signal at a maximum power;

    increasing the TDMA signal to maximum power in response to the control message; and

    determining location information for the mobile telephone based on at least one characteristic of the TDMA signal received at the base station.

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