Apparatus and Method for Controlling Communications to and from Utility Service Points

• US 20110029655A1
• Filed: 10/08/2010
• Published: 02/03/2011
• Est. Priority Date: 08/28/2007
• Status: Active Grant

• Current Assignee: Landis+Gyr Technology, Inc. (Landis+Gyr Group AG)
• Original Assignee: Consert, Inc. (Landis+Gyr Group AG)
• Inventors: LONG, JOHN O. F., WEBB, JOEL L., FORBES, JOSEPH W. JR.
• Granted Patent: US 8,855,279 B2
• Time in Patent Office: Days
• US Class Current: 709/223
• CPC Class Codes: G01D 4/002 Remote reading of utility meters
• CPC Class Codes: G01D 4/004 Remote reading of utility meters to a fixed location
• CPC Class Codes: G06Q 10/00 Administration; Management
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: G08C 15/06 successively, i.e. using time division
• CPC Class Codes: H04B 2203/5433 Remote metering
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines
• 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

An apparatus and method control transmission of messages over a fixed bandwidth link from fixed position communication devices to a central controller in a load management system. The messages include information relating to electric power consumption by power consuming devices located at service points that include the communication devices. In one embodiment, the central controller determines an identifier associated with each communication device, a reporting period during which the messages are to be transmitted by the communication devices, and transmission increments within the reporting period. The controller allocates each transmission increment to a respective group of communication devices. The controller then determines a transmission time for a message from a particular communication device based on the identifier for the particular device, a duration of a transmission increment allocated to a group of communication devices that includes the particular device, and a quantity of communication devices in the particular device'"'"'s group.

Claims

1. A method for controlling transmission of messages over a fixed bandwidth link from a plurality of fixed position communication devices in an active load management system, the messages including information relating to electric power consumption by power consuming devices located at service points at which the communication devices are located, the service points receiving electrical power from a utility, the method comprising:

determining an identifier associated with each communication device;

determining a reporting period during which the messages are to be transmitted by the plurality of communication devices;

determining a plurality of transmission increments within the reporting period;

allocating each transmission increment to a respective group of the plurality of communication devices; and

determining a transmission time for at least one message from a particular communication device based on the identifier for the particular communication device, a duration of a transmission increment allocated to a group of communication devices that includes the particular communication device, and a quantity of communication devices in the group.

2. The method of claim 1, further comprising:

transmitting, by the particular communication device, the at least one message at the transmission time.

3. The method of claim 1, further comprising:

receiving, by the particular communication device, a transmission time message from a central controller, the transmission time message indicating the transmission time for the at least one message.

4. The method of claim 3, wherein the central controller is an active load director.

5. The method of claim 1, wherein fixed bandwidth link is a wireless link.

6. The method of claim 1, further comprising:

transmitting a control message to the particular communication device indicating the transmission time for the at least one message.

7. The method of claim 1, further comprising:

receiving, from a control center of the utility, at least one control message including identifiers associated with the plurality of communication devices, a quantity of the plurality of communication devices, a quantity of transmission increments within the reporting period, and identifications of transmission increments assigned to groups of communication devices.

8. The method of claim 7, further comprising:

determining the duration of the transmission increment allocated to the group of communication devices that includes the particular communication device based on the quantity of transmission increments within the reporting period and a duration of the reporting period.

9. The method of claim 7, further comprising:

determining the quantity of communication devices in the group of communication devices that includes the particular communication device based on the quantity of the plurality of communication devices and the quantity of transmission increments within the reporting period.

10. A method for an immobile communication device operating within an active load management system to control transmission of at least one message over a fixed bandwidth communication link, the at least one message providing information relating to electric power consumption by power consuming devices located at a service point at which the communication device is located, the method comprising:

receiving at least one control message from a central controller, the at least one control message including an identifier associated with the communication device, a quantity of a plurality of immobile communication devices within the active load management system, a quantity of transmission increments within a reporting period during which messages are to be transmitted by the plurality of communication devices, and identification of a transmission increment assigned to a group of communication devices containing the communication device; and

determining a transmission time for the at least one message based on the at least one control message.

11. The method of claim 10, wherein the step of determining a transmission time for the at least one message comprises:

determining a quantity of communication devices within the group containing the communication device based on the quantity of the plurality of communication devices and the quantity of transmission increments within the reporting period;

determining a duration of the transmission increment assigned to the group containing the communication device; and

determining the transmission time for the at least one message based on the identifier associated with the communication device, the quantity of communication devices within the group containing the communication device, and the duration of the transmission increment assigned to the group containing the communication device.

12. The method of claim 11, wherein the step of determining a duration of the transmission increment assigned to the group containing the communication device comprises:

determining the duration of the transmission increment allocated to the group of communication devices containing the communication device based on the quantity of transmission increments within the reporting period and a duration of the reporting period.

13. The method of claim 10, further comprising:

transmitting the at least one message at the transmission time over the communication link.

14. A central controller operable to control transmission of messages in an active load management system from a plurality of fixed position client devices to the central controller over a fixed bandwidth communication link, the messages including information relating to electric power consumption by power consuming devices located at service points at which the client devices are located, the service points receiving electrical power from a utility, the central controller comprising:

a client device manager operable to establish a reporting period during which the messages are to be transmitted by the plurality of client devices, determine a plurality of transmission increments within the reporting period, allocate each transmission increment to a respective group of the plurality of client devices, determine transmission times for the messages based on identifiers for the plurality of client devices, respective durations of transmission increments allocated to respective groups of the plurality of client devices, and a quantity of client devices in each group, and generate at least one control message that includes indications of the transmission times; and

a client device interface operably coupled to the client device manager and the communication link, the client device interface operable to communicate the at least one control message to the plurality of client devices over the communication link.

15. The central controller of claim 14, wherein the client device interface is further operable to receive the messages from the plurality of client devices, the messages having been transmitted by the plurality of client devices at the transmission times indicated in the at least one control message.

16. An immobile communication device operable in an active load management system to control transmission of at least one message over a fixed bandwidth communication link, the at least one message including information relating to electric power consumption by power consuming devices located at a service point at which the communication device is located, the communication device comprising:

a communications interface operable to receive at least one control message from a central controller over the communication link, the at least one control message including an identifier associated with the communication device, a quantity of a plurality of immobile communication devices within the active load management system, a quantity of transmission increments within a reporting period during which messages are to be transmitted by the plurality of communication devices, and identification of a transmission increment assigned to a group of communication devices containing the communication device; and

a device control manager operably coupled to the communications interface, the device control manager operable to determine a transmission time for the at least one message based on the at least one control message.

17. The communication device of claim 16, wherein the communications interface is further operable to transmit the at least one message over the communication link at the transmission time.

18. An active load management system operable to control transmission of messages over a communication link, the messages providing information reporting electric power consumption by power consuming devices located at service points receiving electrical power from a utility, the active load management system comprising:

a plurality of active load client devices, each active load client device including;

a communications interface operable to receive at least one control message indicating a transmission time for transmitting at least one report message, the at least one report message providing information relating to electric power consumption by power consuming devices located at a service point at which the active load client device is located; and

a device control manager operably coupled to the communications interface, the device control manager operable to generate the at least one report message and supply the at least one report message to the communications interface for transmission at the transmission time;

an active load director that includes;

an active load client manager operable to;

determine a transmission period during which report messages are to be transmitted by the plurality of active load client devices,

determine a plurality of transmission increments within the transmission period,

allocate each transmission increment to a respective group of the plurality of active load client devices,

determine transmission times for the report messages based on identifiers for the plurality of active load client devices, respective durations of transmission increments allocated to respective groups of the plurality of active load client devices, and a quantity of active load client devices in each group, and

generate control messages that include indications of the transmission times; and

an active load client interface operably coupled to the active load client manager and the communication link, the active load client interface operable to communicate the control messages to the plurality of active load client devices over the communication link.

19. The active load management system of claim 18, wherein the active load director further includes:

a utility control center command processor operably coupled to the active load client manager and a second communication link between the active load director and a control center of the utility, the utility control center command processor operable to receive from the control center of the utility and provide to the active load client manager at least one update message including the identifiers for the plurality of active load client devices, a quantity of the plurality of active load client devices, a quantity of the plurality of transmission increments within the transmission period, and identifications of transmission increments assigned to groups of the plurality of active load client devices;

wherein the active load client manager is further operable to determine transmission times for the report messages based on the at least one update message.

20. The active load management system of claim 18, wherein the communications interface supports a wide area wireless protocol.