CA2414777A1 - Spread spectrum meter reading system utilizing low-speed/high-power frequency hopping - Google Patents

Spread spectrum meter reading system utilizing low-speed/high-power frequency hopping Download PDF

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Publication number
CA2414777A1
CA2414777A1 CA002414777A CA2414777A CA2414777A1 CA 2414777 A1 CA2414777 A1 CA 2414777A1 CA 002414777 A CA002414777 A CA 002414777A CA 2414777 A CA2414777 A CA 2414777A CA 2414777 A1 CA2414777 A1 CA 2414777A1
Authority
CA
Canada
Prior art keywords
spread spectrum
frequency hopping
hopping spread
end point
encoder transmitter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002414777A
Other languages
French (fr)
Other versions
CA2414777C (en
Inventor
Scott Cumeralto
John Macconnell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Itron Inc
Original Assignee
Itron, Inc.
Scott Cumeralto
John Macconnell
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Itron, Inc., Scott Cumeralto, John Macconnell filed Critical Itron, Inc.
Publication of CA2414777A1 publication Critical patent/CA2414777A1/en
Application granted granted Critical
Publication of CA2414777C publication Critical patent/CA2414777C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/54Systems for transmission via power distribution lines
    • H04B3/546Combination of signalling, telemetering, protection
    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00Electric signal transmission systems
    • G08C19/12Electric signal transmission systems in which the signal transmitted is frequency or phase of ac
    • G08C19/14Electric signal transmission systems in which the signal transmitted is frequency or phase of ac using combination of fixed frequencies
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/713Spread spectrum techniques using frequency hopping
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/02Details
    • H04B3/36Repeater circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q9/00Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5408Methods of transmitting or receiving signals via power distribution lines using protocols
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429Applications for powerline communications
    • H04B2203/5433Remote metering
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429Applications for powerline communications
    • H04B2203/5441Wireless systems or telephone
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462Systems for power line communications
    • H04B2203/547Systems for power line communications via DC power distribution
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462Systems for power line communications
    • H04B2203/5479Systems for power line communications using repeaters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462Systems for power line communications
    • H04B2203/5491Systems for power line communications using filtering and bypassing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2209/00Arrangements in telecontrol or telemetry systems
    • H04Q2209/40Arrangements in telecontrol or telemetry systems using a wireless architecture
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2209/00Arrangements in telecontrol or telemetry systems
    • H04Q2209/50Arrangements in telecontrol or telemetry systems using a mobile data collecting device, e.g. walk by or drive by
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2209/00Arrangements in telecontrol or telemetry systems
    • H04Q2209/60Arrangements in telecontrol or telemetry systems for transmitting utility meters data, i.e. transmission of data from the reader of the utility meter
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2209/00Arrangements in telecontrol or telemetry systems
    • H04Q2209/80Arrangements in the sub-station, i.e. sensing device
    • H04Q2209/82Arrangements in the sub-station, i.e. sensing device where the sensing device takes the initiative of sending data
    • H04Q2209/826Arrangements in the sub-station, i.e. sensing device where the sensing device takes the initiative of sending data where the data is sent periodically

Abstract

A spread spectrum meter reading system enables the use of high power frequen cy hopping spread spectrum (HFSS) transmission at both the encoder transmitter and repeater levels of the meter reading system. A plurality of end point encoder transmitter devices (RF devices) are each connected to a utility met er and transmit high power FHSS signals containing metering data for the corresponding utility meter. A plurality of intermediate transceiver units (PET Repeaters) both receives and retransmits the high power FHSS signals. T he base station (PETRC Base Unit) can receive the high power FHSS signals from both the encoder transmitter devices and the intermediate transceiver units. The intermediate transceiver units aggregates metering data from multiple encoder transmitter devices prior to block retransmission of the metering da ta to the base station. The high power FHSS signals are transmitted at a maximu m hopping rate to reduce power consumption and increase battery life of the devices.

Claims (14)

1. A spread spectrum meter reading system, comprising:
a plurality of end point encoder transmitter devices each of which is operably connected to a utility meter and transmits high power frequency hopping spread spectrum signals containing at least metering data for the corresponding utility meter;
a plurality of intermediate transceiver units, wherein the number of intermediate transceiver units is less than the number of end point encoder transmitter devices and wherein each of said intermediate transceiver units receives and retransmits the high power frequency hopping spread spectrum signals; and a base station having a receiver that receives the high power frequency hopping spread spectrum signals.
2. The system of claim 1, wherein the high power frequency hopping spread spectrum signals comply with FCC Part 15.247.
3. The system of claim 1, wherein the high power frequency hopping spread spectrum signals are transmitted at a maximum hopping rate of at least one minute per hop.
4. The system of claim 1, wherein the high power frequency hopping spread spectrum signals include at least twenty five channels, at least two of which are reserved as acquisition channels.
5. A meter end point encoder transmitter device, wherein the device is operably coupled to a utility meter that forms part of a utility meter reading system, the device comprising:

a radio frequency sub-system that transmits consumption data from the utility meter using frequency hopping spread spectrum signal; and a digital subsystem, wherein the digital sub-system includes a first processor and a second processor, wherein the first processor runs continuously and controls the operation of the radio frequency sub-system, and wherein the second processor runs only upon utilization of the radio frequency sub-system.
6. The device of claim 5, wherein the first processor operates at a low speed and the second processor operates at a high speed.
7. The device of claim 6, wherein the first processor and the second processor are comprised of two distinct processors.
8. A meter end point encoder transmitter device, wherein the device is operably coupled to a utility meter that forms part of a utility meter reading system, the device comprising:
a radio frequency sub-system that transmits consumption data from the utility meter using frequency hopping spread spectrum signal; and a digital subsystem, wherein the digital subsystem is powered by a battery and wherein upon nearing a time for the radio frequency sub-system to transmit the digital subsystem directs a charge pump capacitor to charge, and once the charge pump capacitor is charged the digital sub-system enables at least a portion of the radio frequency sub-system to run off the charge pump capacitor during the consumption data transmission.
9. The device of claim 8, wherein utilization of the charge pump capacitor by the radio frequency sub-system during transmission limits a drain on the battery.
10. The device of claim 8, wherein the digital subsystem includes a first low-speed processor and a second high-speed processor, and wherein the first low-speed processor monitors the status of the battery and transfers the status of the battery to the second high-speed processor.
11. A utility meter reading system, comprising:
a plurality of meter end point encoder transmitter devices each of which is operably connected to a utility meter and transmits data using a low-speed frequency hopping spread spectrum mode; and at least a base unit that receives transmissions from the plurality of encoder transmitter devices, wherein upon installation of one of said plurality of meter end point encoder transmitter devices, the installed meter end point encoder transmitter device operates for an initial period of time in a installation mode that uses a high-speed frequency hopping spread spectrum mode.
12. A utility meter reading system, comprising:
a meter end point encoder transmitter device operably connected to a utility meter; and at least a base unit, wherein the meter end point encoder transmitter device transmits consumption data to at least the base unit by utilizing frequency hopping spread spectrum and wherein the transmitted consumption data is in the form of a plurality of buckets of data, each bucket representing a period of time of consumption data from which the base unit may retrieve desired consumption data.
13. The system of claim 12, wherein the base unit utilizes a time and frequency transmission collision avoidance scheme in combination with the bucket transmission.
14. A spread spectrum meter reading system, comprising:
a plurality of end point encoder transmitter devices each of which is operably connected to a utility meter and transmits frequency hopping spread spectrum signals containing at least metering data for the corresponding utility meter;
a plurality of intermediate transceiver units, wherein the number of intermediate transceiver units is less than the number of end point encoder transmitter devices and wherein each of said intermediate transceiver units receives and retransmits the frequency hopping spread spectrum signals; and a base station having a receiver that receives the high power frequency hopping spread spectrum signals, wherein each of the encoder transmitter devices and the transceiver units incorporates a transmission counter value maintained by that device or unit that is used to calculate latency information, and wherein the base station time stamps each received transmission with a real time clock such that accurate calculation of the actual meter reading time can be determined from the combination of the time stamp and the latency information.
CA2414777A 2000-07-21 2001-07-23 Spread spectrum meter reading system utilizing low-speed/high-power frequency hopping Expired - Fee Related CA2414777C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US22001500P 2000-07-21 2000-07-21
US60/220,015 2000-07-21
PCT/US2001/023303 WO2002008866A2 (en) 2000-07-21 2001-07-23 Spread spectrum meter reading system utilizing low-speed/high-power frequency hopping

Publications (2)

Publication Number Publication Date
CA2414777A1 true CA2414777A1 (en) 2002-01-31
CA2414777C CA2414777C (en) 2010-03-30

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Family Applications (1)

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CA2414777A Expired - Fee Related CA2414777C (en) 2000-07-21 2001-07-23 Spread spectrum meter reading system utilizing low-speed/high-power frequency hopping

Country Status (9)

Country Link
US (1) US7283580B2 (en)
EP (2) EP2381586A1 (en)
JP (1) JP2004518313A (en)
KR (1) KR20030082536A (en)
AU (2) AU2001280740B2 (en)
BR (1) BR0112613A (en)
CA (1) CA2414777C (en)
MX (1) MXPA03000516A (en)
WO (1) WO2002008866A2 (en)

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