Locating endpoints in a power line communication system

• US 7,742,393 B2
• Filed: 07/24/2003
• Issued: 06/22/2010
• Est. Priority Date: 07/24/2003
• Status: Active Grant

• Current Assignee: Hunt Techonologies Incorporated (Landis+Gyr Group AG)
• Original Assignee: Hunt Techonologies Incorporated (Landis+Gyr Group AG)
• Inventors: Flen, Rolf J., Bonicatto, Damian G., Wolter, Chad K., Olson, Verne J., Olson, David F.
• Primary Examiner(s): Harper; Kevin C
• Assistant Examiner(s): WONG, XAVIER S
• Application Number:
  US10/626,496
• Publication Number:
  US 20050083925A1
• Time in Patent Office: 2,525 Days
• Field of Search: 370/389, 370/351, 370/392, 370/395.1, 370/396, 370/395.2, 370/395.21, 370/464, 370/465, 370/475, 370/480, 370/481, 370/482, 340/310, 340/538, 340/870, 713/300
• US Class Current: 370/216
• CPC Class Codes: H04B 2203/5416 by adding signals to the wave form of the power source
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/5466 using three phases conductors
• CPC Class Codes: H04B 2203/5483 using coupling circuits
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines

Abstract

A system for bi-directional communication within a power distribution system. The system is configured to find an endpoint, the endpoint having an endpoint transceiver in electrical communication with a power distribution line. The power distribution line is within the power distribution system, and the endpoint is identified by a unique identifier (I.D.). The system comprises a substation transceiver electrically coupled to a power distribution line within the power distribution system. A substation circuit is in electrical communication with the substation transceiver. The substation circuit is programmed to map the unique I.D. endpoint to a base frequency within a bandwidth and to control the endpoint to transmit a find endpoint data packet onto the power distribution network. The find endpoint data packet includes the unique I.D. and the base frequency. The substation circuit is further programmed to assign a status to the base frequency upon receiving a signal from the endpoint, the status indicating that the substation transceiver is receiving signals in the frequency bandwidth.

Claims

1. A system for bi-directional communication within a power distribution system, the system configured to find an endpoint, the endpoint having an endpoint transceiver in electrical communication with a power distribution line, the power distribution line being within the power distribution system, the endpoint being identified by a unique identifier (I.D.), the system comprising:

a substation transceiver electrically coupled to a power distribution line within the power distribution system;

a substation circuit in electrical communication with the substation transceiver, the substation circuit programmed to;

map the unique I.D. for the endpoint to a base frequency within a bandwidth and to control the substation receiver to transmit a find endpoint data packet onto the power distribution network, the find endpoint data packet including the unique I.D. and the base frequency; and

assign a status to the base frequency upon receiving a signal from the endpoint the status indicating that the substation transceiver is receiving signals in the frequency bandwidth; and

a second substation transceiver and a second substation circuit, the second substation transceiver being in electrical communication with the second substation circuit, the second substation transceiver and the second substation circuit being located at a second power distribution substation; and

a control server in data communication with the substation circuit at the first power distribution substation and the substation circuit at the second power distribution substation;

wherein, upon a loss of communication between the endpoint and the substation transceiver at the first power distribution substation, the control server instructs the substation circuit at the second substation to map the unique I.D. identifying the endpoint to a base frequency within a bandwidth and to control the substation transceiver at the second power distribution substation to transmit a find endpoint data packet over the power distribution system, the data packet including the unique I.D., for the endpoint and the base frequency, and to assign a status to the base frequency upon receiving a signal from the endpoint, the status indicating that the substation transceiver located at the second power distribution substation is receiving signals in the bandwidth corresponding to the base frequency.

2. The system of claim 1 wherein the substation circuit is further programmed to:

determine whether the substation transceiver stopped receiving a signal within the bandwidth corresponding to the base frequency assigned to the endpoint transceiver; and

control the substation transceiver to retransmit the find endpoint data packet containing the unique I.D. of the endpoint and the base frequency assigned to the endpoint transceiver.

3. The system of claim 1 wherein the substation circuit is further programmed to control the substation transceiver to repeatedly transmit the find endpoint data packet in a predetermined interval until the substation transceiver receives a signal from the endpoint identified by the unique I.D.

4. The system of claim 3 wherein the predetermined interval is about minute.

5. The system of claim 3 wherein the substation circuit is further programmed to control the substation transceiver to repeatedly transmit the find endpoint data packet in a predetermined interval, the repeated transmission of the data packet being interrupted only by a prescheduled transmission of an alternative data packet.