Apparatus and method for controlling communications to and from fixed position communication devices over a fixed bandwidth communication link

• US 9,305,454 B2
• Filed: 07/28/2014
• Issued: 04/05/2016
• 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: Forbes, Joseph W. Jr., Webb, Joel L., Long, John O. F.
• Primary Examiner(s): Phan, Joseph T
• Application Number:
  US14/444,018
• Publication Number:
  US 20140368353A1
• Time in Patent Office: 617 Days
• US Class Current: 1/1
• 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 communication link from fixed position client or communication devices to a central controller. In one exemplary embodiment, the central controller determines an identifier associated with each communication device, a reporting period during which messages are to be transmitted by the communication devices, and transmission increments within the reporting period. The central controller allocates each transmission increment to a respective group of multiple communication devices. The central controller then determines transmission times for messages from the communication devices, such that a transmission time for any particular communication device is based on (a) the identifier for the particular communication device, (b) a duration of a transmission increment allocated to a group of communication devices that includes the particular communication device, and (c) a quantity of communication devices in the group of communication devices that includes the particular communication device.

Claims

1. A method for controlling transmission of messages over a fixed bandwidth link from a plurality of fixed position communication devices within a system, the method comprising:

determining an identifier associated with each fixed position communication device of the plurality of communication devices;

determining a reporting period during which 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, wherein each group of fixed position communication devices includes multiple communication devices; and

determining transmission times for messages from the plurality of communication devices, such that a transmission time for any particular fixed position communication device is based on (a) the identifier for the particular communication device, (b) a duration of a transmission increment allocated to a group of fixed position communication devices that includes the particular communication device, and (c) a quantity of communication devices in the group of communication devices that includes the particular communication device.

2. The method of claim 1, further comprising:

transmitting, by the particular communication device, 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 particular communication device.

4. The method of claim 3, wherein the central controller is an active load director of an active load management system and wherein the messages include information relating to electric power consumption by power consuming devices located at service points at which the plurality of communication devices are located, the service points receiving electrical power from a utility.

5. The method of claim 1, wherein the 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 particular communication device.

7. The method of claim 1, further comprising:

receiving, from a control center, at least one control message including identifiers associated with the plurality of communication devices, a number representing a quantity of the plurality of communication devices within the system, a number representing 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 (a) the number representing the quantity of communication devices within the system and (b) the number representing the quantity of transmission increments within the reporting period.

10. A method for a fixed position communication device of a plurality of fixed position communication devices within a system to control transmission of at least one message over a fixed bandwidth communication link, the method comprising:

receiving at least one control message from a central controller, the at least one control message including transmission time determination parameters, the transmission time determination parameters including (a) an identifier associated with the communication device, (b) a number representing a quantity of fixed position communication devices within the system, (c) a number representing a quantity of transmission increments within a reporting period during which messages are to be transmitted by the plurality of communication devices, and (d) identification of a transmission increment assigned to a group of fixed position communication devices containing the communication device; and

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

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

determining a quantity of fixed position communication devices within the group of communication devices containing the communication device based on (a) the number representing the quantity of communication devices within the system and (b) the number representing the quantity of transmission increments within the reporting period;

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

determining the transmission time for the at least one message based on (a) the identifier associated with the communication device, (b) the quantity of communication devices within the group of communication devices containing the communication device, and (c) the duration of the transmission increment assigned to the group of communication devices 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 of communication devices 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 a system from a plurality of fixed position client devices to the central controller over a fixed bandwidth communication link, 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 (a) identifiers for the plurality of client devices, (b) respective durations of transmission increments allocated to respective groups of fixed position client devices, and (c) a quantity of client devices in each group of client devices; 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. A fixed position communication device operable in a system to control transmission of at least one message over a fixed bandwidth communication link, the system including a plurality of fixed positions communication devices, 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 transmission time determination parameters, the transmission time determination parameters including (a) an identifier associated with the communication device, (b) a number representing a quantity of the communication devices within the system, (c) a number representing a quantity of transmission increments within a reporting period during which messages are to be transmitted by the plurality of communication devices, and (d) identification of a transmission increment assigned to a group of fixed position 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 transmission time determination parameters.

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. A system operable to control transmission of messages over a fixed bandwidth communication link, the system comprising:

a plurality of fixed position client devices, each 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; 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 central controller that includes;

a client manager operable to;

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

determine a plurality of transmission increments within the transmission period,

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

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

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

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

19. The system of claim 18, wherein the central controller further includes:

a command processor operably coupled to the client manager and a second communication link between the central controller and a control center, the command processor operable to receive from the control center and provide to the client manager at least one update message including (a) the identifiers for the plurality of client devices, (b) a number representing a quantity of the plurality of client devices, (c) a number representing a quantity of the plurality of transmission increments within the transmission period, and (d) identifications of transmission increments assigned to groups of the plurality of client devices;

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

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