Cell router failure detection in a mesh network

• US 9,419,888 B2
• Filed: 12/22/2011
• Issued: 08/16/2016
• Est. Priority Date: 12/22/2011
• Status: Active Grant

• Current Assignee: Itron Global Sarl (Itron, Inc.)
• Original Assignee: Itron, Inc.
• Inventors: Monier, Fabrice, Bartier, Jerome, Van Wyk, Hartman
• Primary Examiner(s): Nguyen, Hanh N
• Application Number:
  US13/334,951
• Publication Number:
  US 20130162441A1
• Time in Patent Office: 1,699 Days
• Field of Search: 370216-219, 370/220, 370/221, 370/242, 370/244, 370/245, 370/400, 370/401, 370/405, 370/406, 370/408, 370/252, 370/350, 370/503, 370/509, 370/510, 340/870.11, 340/870.02, 709/224, 455/436
• US Class Current: 1/1
• CPC Class Codes: H04L 41/064 involving time analysis
• CPC Class Codes: H04L 41/085 Retrieval of network configuration; Tracking network configuration history
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 45/28 using route fault recovery
• CPC Class Codes: H04W 40/22 using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

Abstract

The presently disclosed subject matter is directed to methodologies, apparatuses, and systems for providing cell router (relay) failure detection in a mesh network. Individual cell relays heading up cells within a mesh network transmit synchronization signals including as a portion thereof a counter value. Nodes with the cells monitor the counter value and search for a new connection to a central facility if the counter value fails to update within a predetermined value.

Claims

1. A method for providing cell router failure detection in a mesh network for collection of metering data, comprising:

periodically updating, by a processor, a stored value based on a value received from a cell relay;

comparing, by a comparator communicatively coupled with the processor, a newly received value from the cell relay with the stored value, wherein the stored value was previously received from the cell relay and the newly received value is an update to the stored value; and

determining, by the processor, whether communications with the cell relay have failed based on the results of the comparison, wherein communications with the cell relay is indicated as having failed based on a determination that the stored value has not changed within a predetermined period of time.

2. A method as in claim 1, wherein the value received from the cell relay is received as a counter portion of a synchronization frame.

3. A method as in claim 1, wherein the stored value corresponds to a numerical count value.

4. A method as in claim 1, wherein the stored value corresponds to a time value.

5. A method as in claim 1, wherein the mesh network is associated with a collection engine, and a plurality of other cell relays and associated nodes.

6. A method as in claim 5, wherein at least some of the associated nodes are respectively associated with metering endpoints, and the collection engine is operative for collecting metering data from such metering endpoints.

7. A method as in claim 1, wherein an indication that communications with the cell relay has failed is further based on a significance of a numerical difference in value of the stored value and the newly received value.

8. A network enabled node device for collection of metering data, comprising:

a counter configured to be updated based on a received network signal;

a comparator configured to compare an updated counter value with a previous counter value; and

a processor configured to search for network access if results of a comparison of said updated counter value and said previous counter value shows that said counter fails to have a change in value within a predetermined time period.

9. A device as in claim 8, wherein said counter is updated based on a portion of a network synchronization frame.

10. A device as in claim 9, wherein said portion contains a numerical value.

11. A device as in claim 10, wherein the numerical value corresponds to a time value.

12. A device as in claim 11, wherein said processor searches for network access if the time value has not changed within a predetermined period of time.

13. A device as in claim 8, wherein said device is configured for operation with a mesh network having a data collection engine, at least one cell relay, and a plurality of said node devices.

14. A device as in claim 8, wherein the processor is further configured to search for network access if results of the comparison of said updated counter value and said previous counter value show a significance of a numerical difference between the updated counter value and the previous counter value.