POWER OUTAGE MANAGEMENT AND POWER SUPPORT RESTORATION FOR DEVICES IN A WIRELESS NETWORK

• US 20090278708A1
• Filed: 05/08/2008
• Published: 11/12/2009
• Est. Priority Date: 05/08/2008
• Status: Active Grant

• Current Assignee: Elster Electricity LLC (Honeywell International Inc.)
• Original Assignee: Elster Electricity LLC (Honeywell International Inc.)
• Inventors: Shuey, Kenneth C., Kelley, Raymond H.
• Granted Patent: US 7,940,679 B2
• Time in Patent Office: Days
• US Class Current: 340/870.390
• CPC Class Codes: G01D 2204/22 Arrangements for detecting or reporting faults, outages or leaks
• CPC Class Codes: G01D 2204/45 Utility meters networked together within a single building
• CPC Class Codes: G01D 2204/47 Methods for determining the topology or arrangement of meters in a network
• CPC Class Codes: G01D 4/002 Remote reading of utility meters
• CPC Class Codes: H04L 12/2825 Reporting to a device located outside the home and the home network access arrangements H04L12/2856; for remote control or remote monitoring of applications H04L67/025; telephonic communication systems adapted for combination with telemetering systems H04M11/002
• CPC Class Codes: H04L 41/22 comprising specially adapted graphical user interfaces [GUI]
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

Abstract

Techniques for power outage management and power support restoration for devices in a wireless network are disclosed herein. Such a wireless network may include a number of bi-directional nodes in bi-directional wireless communication with one or more central nodes. Each bi-directional node may have a wireless communication path to one of the central nodes that is either a direct path or an indirect path through one or more intermediate bi-directional nodes serving as relays. Each bi-directional node may be configured to detect when it has become stranded such that it can no longer communicate with its assigned central node via its assigned communication path, to determine a reason for its stranding, and to transmit a stranding notification and the reason therefore.

Claims

1. A wireless network comprising:

one or more central nodes; and

a plurality of bi-directional nodes in bi-directional wireless communication with the one or more central nodes, each of the bi-directional nodes having a wireless communication path to one of the central nodes that is either a direct path or an indirect path through one or more intermediate bi-directional nodes serving as relays,

wherein each bi-directional node is configured to detect when it has become stranded such that it can no longer communicate with its assigned central node via its assigned communication path, to determine a reason for its stranding, and to transmit a stranding notification and the reason therefore.

2. The wireless network of claim 1, wherein each central node is configurable to broadcast a request that any stranded node respond to the request, and each of the bi-directional nodes is configured to either respond to the request with the stranding notification and the reason therefore or to re-broadcast the request if not stranded.

3. The wireless network of claim 2, wherein the request is broadcast or re-broadcast between bi-directional nodes assigned to different central nodes.

4. The wireless network of claim 1, wherein each central node is configurable to transmit a targeted ping request to a suspected stranded bi-directional node.

5. The wireless network of claim 4, wherein the suspected stranded bi-directional node is assigned to a different central node than the central node that transmits the targeted ping request.

6. The wireless network of claim 1, wherein each bi-directional node is configured to broadcast the stranding notification.

7. The wireless network of claim 1, wherein the reason for stranding is receiving a power outage notification from an upstream node in the assigned communication path.

8. The wireless network of claim 1, wherein the reason for stranding is lack of communication received for greater than a threshold time period after a power restoration process.

9. The wireless network of claim 1, wherein the reason for stranding is lack of communication received from a central node for greater than a threshold time period.

10. The wireless network of claim 1, wherein each bi-directional node is configured to receive a power outage notification from another node and to broadcast a surrogate power outage notification on behalf of the other node.

11. The wireless network of claim 1, wherein each bi-directional node is configured to broadcast a power outage notification message if the bi-directional node is the end node on its communication path to its central node, and to transmit the power outage notification message along its communication path to its central node if the bi-directional node is not the end node on its communication path to its central node.

12. In a wireless network comprising one or more central nodes and a plurality of bi-directional nodes in bi-directional wireless communication with the one or more central nodes, each of the bi-directional nodes having a wireless communication path to one of the central nodes that is either a direct path or an indirect path through one or more intermediate bi-directional nodes serving as relays, a method for re-establishing communications with a stranded bi-directional node comprising:

receiving a stranded notification that the stranded bi-directional node has become stranded such that the stranded bi-directional node cannot communicate with its central node via its communication path;

responsively determining a new communication path for the stranded node to its previous central node or to a different central node; and

transmitting an identification of the new communication path to the stranded bi-directional node via the new communication path.

13. The method of claim 12, wherein the reason for stranding is receiving a power outage notification from an upstream node in the assigned communication path.

14. The method of claim 12, wherein the reason for stranding is lack of communication received for greater than a threshold time period after a power restoration process.

15. The method of claim 12, wherein the reason for stranding is lack of communication received from a central node for greater than a threshold time period.

16. The method of claim 12, further comprising transmitting a stranding request that any stranded node respond to the request.

17. In a wireless automated meter reading network comprising one or more collectors and a plurality of meters in bi-directional wireless communication with the one or more collectors, each of the meters having a wireless communication path to one of the collectors that is either a direct path or an indirect path through one or more intermediate meters serving as relays, a method for optimizing a plan for restoring power during a power outage comprising:

receiving notifications that one or more meters have become stranded such that the stranded meters cannot communicate with their central nodes via their normal communication paths;

determining new communication paths between the stranded meters and their previous central nodes or different central nodes; and

determining a plan for restoration of power based on the notifications received from the stranded meters.

18. The method of claim 17, wherein the reason for stranding is receiving a power outage notification from an upstream node in the assigned communication path.

19. The method of claim 17, wherein the reason for stranding is lack of communication received for greater than a threshold time period after a power restoration process.

20. The method of claim 17, wherein the reason for stranding is lack of communication received from a central node for greater than a threshold time period.