System and methods for synchronizing edge devices on channels without carrier sense
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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Abstract
A system and method are disclosed for synchronizing edge devices on a network, wherein the network has limited bandwidth and does not support a practical carrier sense mechanism. The edge devices transmit, using a slotted protocol, to a server located at a central data aggregation point. The server also controls a Central Transmitter, which sends messages to the edge devices to assign transmission slots and provide timing information to the edge devices to ensure that transmissions sent by devices sharing the same communication channel do not collide.
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Citations
29 Claims
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1. A system for synchronizing an intelligent communicating device (ICD) on an electrical distribution grid, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for synchronizing an intelligent communicating device (ICD) on an electrical distribution grid, comprising:
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a server comprising a processor, the server configured to; maintain, on a high voltage side of a transformer, a queue of messages, at least one of the messages comprising a master frame announcement (MFA) that identifies 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 located on a low voltage side of the transformer; and an ICD configured to; request, via a communication medium other than the electrical distribution grid, the messages from the queue of messages; receive the MFA; receive synchronization information to synchronize a clock of the ICD; 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. - View Dependent Claims (10, 11)
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12. A method for synchronizing an intelligent communicating device (ICD) on an electrical distribution grid, comprising:
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transmitting, by a Central Transmitter (CT) coupled to the electrical distribution grid on a high voltage side of a transformer, a plurality of master frame announcements (MFAs) at arbitrary times through the transformer to a plurality of ICDs that receive power from the transformer, each respective 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 the plurality of ICDS; receiving, by a first ICD of the plurality of ICDs, one MFA of the plurality of MFAs, the first ICD comprising a clock and coupled to the electrical distribution grid on a low voltage side of the transformer; based on the time of transmission of the one MFA and the future time of the corresponding master frame, synchronizing the clock; awaiting the future time of the corresponding master frame; and transmitting, by the first ICD, 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 first ICD. - View Dependent Claims (13, 14, 15, 16)
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17. A method for synchronizing an intelligent communicating device (ICD) on an electrical distribution grid, comprising:
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maintaining, on a server on a high voltage side of a transformer, a queue of messages, at least one of the messages comprising a Master Frame Announcement (MFA) that identifies 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 located on a low voltage side of the transformer; requesting, by an ICD of the plurality of ICDs via a communication medium other than the electrical distribution grid, the messages from the queue of messages; receiving, by the ICD, the MFA; receiving, by the ICD, synchronization information to synchronize a clock of the ICD; awaiting the future time of the corresponding master frame; and transmitting, by the ICD, 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. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification