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METHOD FOR SYNCHRONIZING FREQUENCY-HOPPING SHORT-RANGE RADIO DEVICES

  • US 20090167521A1
  • Filed: 12/31/2007
  • Published: 07/02/2009
  • Est. Priority Date: 12/31/2007
  • Status: Active Grant
First Claim
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1. A method for synchronizing a security system control panel and a sensor, where the security system control panel and the sensor each have a transceiver, the method comprising the steps of:

  • monitoring a publicly broadcast signal for a time signal by the security system control panel;

    receiving periodically the time signal at the security system control panel;

    calculating a frequency hopping index pointer by the security system control panel using the time signal; and

    accessing a frequency hopping table using the frequency hopping index pointer, the frequency hopping table is used by the security system control panel to determine when to hop between a plurality of different receiving channels and which of the plurality of different receiving channels to hop.

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