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Cell phone emergency mode for location in rubble

  • US 10,070,249 B2
  • Filed: 08/19/2016
  • Issued: 09/04/2018
  • Est. Priority Date: 08/26/2015
  • Status: Active Grant
First Claim
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1. A method for operating a mobile phone in an emergency mode (hereinafter:

  • E-mode) when suddenly buried by rubble, comprising;

    detecting, at the mobile phone, a sudden reduction in signal strength received from a first cellular base station;

    determining that a position of the mobile phone has not changed during the sudden reduction in signal strength; and

    if the position of the mobile phone has not changed during the sudden reduction in signal strength, the mobile phone entering the E-mode including reducing one or more of;

    a signal strength of transmissions by the mobile phone;

    a transmission duty cycle by the mobile phone; and

    receiver circuit power consumption of the mobile phone.

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