Granted Patent B2

US 9,094,430 · App. 13/254,439 · Granted Jul 28, 2015

Inventor: Sibing Wang (Shanghai, CN)

Assignee: Atmel Corporation

H04L67/12H04L41/12H04L61/2038Y02B90/246Y04S20/42

Abstract

Claims (41)

1. A method for providing an identification of individual smart meters among a plurality of smart meters communicably coupled in a networked grid area, each smart meter in the grid area having a memory, a unique identification number stored in the memory, a processor, and a communications interface, the memory including instructions for execution by the processor for performing the method, the method comprising:

calculating, by the processor, a first value corresponding to a first unique identification number of the smart meter;

receiving, by the communications interface, a query message including a second value corresponding to a second unique identification number of one of the plurality of smart meters;

determining, by the processor, that the calculated first value corresponding to the first unique identification number of the smart meter matches the second value included in the received query message; and

in response to determining that the calculated first value corresponding to the first unique identification number of the smart meter matches the second value included in the received query message, sending, by the communications interface, a response message including the first unique identification number of the smart meter.

2. The method of claim 1 , wherein the query message is ignored if the first value differs from the second value.

3. The method of claim 1 , further comprising:

determining, by the processor, validity of the received query message,

wherein the received query message includes cyclic redundancy check (CRC) information for the second value, and wherein determining the validity of the received query message includes comparing the CRC information in the received query message to one or more CRC values generated at the smart meter for the received query message.

4. The method of claim 3 , wherein the query message is ignored if it is determined to be invalid.

5. The method of claim 1 , further comprising:

before sending a response message, determining, by the processor, whether there are any conflicts for sending the response message; and

initiating a delay before sending the response message if conflicts are detected.

6. The method of claim 1 , wherein the plurality of smart meters are communicably coupled in the grid area through a power line communication (PLC) network.

7. The method of claim 6 , wherein the query message and the response message are transmitted on a dedicated channel in the PLC network.

8. The method of claim 1 , wherein the first value comprise a hash value of the first unique identification number, and the second value comprises a hash value of the second unique identification number.

9. A method for identifying individual smart meters among a plurality of smart meters in a networked grid area by a host device, the host device including a processor, a memory, and a communications interface, the memory including instructions for execution by the processor for performing the method, the method comprising:

sending, by the communications interface, a query message to the smart meters in the networked grid area, the query message including a first value corresponding to a unique identification number of an individual smart meter of the plurality of smart meters, the first value comprising a hash value generated to designate the individual smart meter;

receiving, by the communications interface, a response message from the individual smart meter having the unique identification number;

assigning, by the processor, a logical identification number to the individual smart meter;

storing, in the memory, the logical identification number and the unique identification number; and

sending, by the communications interface, the logical identification number to the individual smart meter.

10. The method of claim 9 , wherein the grid area is networked through a power line communication (PLC) network.

11. The method of claim 10 , wherein the query message and the response message are transmitted on a dedicated channel in the PLC network.

12. The method of claim 9 , wherein storing the logical identification number and the unique identification number comprises storing the logical identification number and the unique identification number in a routing table in the memory.

13. The method of claim 9 , wherein the host device comprises a smart meter among the plurality of smart meters.

14. The method of claim 9 , wherein the first value comprises a hash value of the unique identification number.

15. The method of claim 9 , wherein the method is repeated until all of the smart meters have provided a response message.

16. A smart grid having at least one host device and a plurality of smart meters, the host device and the plurality of smart meters being communicably coupled in the smart grid, wherein an identity of the smart meters in the smart grid is determined by performing a method comprising:

calculating, at the smart meters, a first value corresponding to an identification value unique to each smart meter;

sending, by the host device, a query message to the plurality of smart meters in the smart grid, the query message including a second value corresponding to the identification value unique to each smart meter;

receiving, at the smart meters, the query message;

determining, by each of the smart meters, if the second value included in the query message matches the calculated first value corresponding to the identification value unique to the smart meter; and

sending, by each of the smart meters, a response message if the second value included in the query message matches the calculated first value corresponding to the identification value unique to the smart meter.

17. The method of claim 16 , wherein the smart meters ignore the query message if the second value does not match the first value.

18. The method of claim 16 , further comprising:

assigning a logical identification number to a responsive smart meter that sends the response message;

storing the assigned logical identification number and identification number unique to the responsive smart meter in a routing table; and

sending an acceptance message including the assigned logical identification number to the responsive smart meter.

19. The method of claim 16 , wherein the host device and the plurality of smart meters are communicably coupled in the smart grid through a power line communication (PLC) network.

20. The method of claim 19 , wherein the query message and the response message are transmitted on a dedicated channel in the PLC network.

Assignments (18)

Continuity (1)