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System and methods for synchronizing edge devices on channels without carrier sense

  • US 9,380,545 B2
  • Filed: 08/03/2012
  • Issued: 06/28/2016
  • Est. Priority Date: 08/03/2011
  • Status: Active Grant
First Claim
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1. A system for synchronizing an intelligent communicating device (ICD) on an electrical distribution grid, comprising:

  • a Central Transmitter (CT) configured to be coupled to the electrical distribution grid on a high voltage side of a transformer; and

    an ICD comprising a clock and configured to be coupled to the electrical distribution grid on a low voltage side of the transformer;

    wherein;

    the CT is configured to transmit a plurality of master frame announcements (MFAs) at arbitrary times through the transformer to the ICD, each MFA identifying a time of transmission of the respective MFA and a future time of a corresponding master frame, the corresponding master frame comprising a plurality of time slots, each time slot associated with a particular ICD of a plurality of ICDs; and

    the ICD is configured to;

    receive one MFA of the plurality of MFAs;

    based on the time of transmission of the one MFA and the future time of the corresponding master frame, synchronize the clock;

    await the future time of the corresponding master frame; and

    transmit data on the electrical distribution grid to the high voltage side of the transformer in a time slot of the corresponding master frame that is associated with the ICD.

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