WO2004036813A2 - Repeaters sharing a common medium for communications - Google Patents

Repeaters sharing a common medium for communications Download PDF

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Publication number
WO2004036813A2
WO2004036813A2 PCT/US2003/033082 US0333082W WO2004036813A2 WO 2004036813 A2 WO2004036813 A2 WO 2004036813A2 US 0333082 W US0333082 W US 0333082W WO 2004036813 A2 WO2004036813 A2 WO 2004036813A2
Authority
WO
WIPO (PCT)
Prior art keywords
repeater
band
communications
transmission
medium
Prior art date
Application number
PCT/US2003/033082
Other languages
French (fr)
Other versions
WO2004036813A3 (en
Inventor
Yehuda Cern
Original Assignee
Ambient Corporation
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 Ambient Corporation filed Critical Ambient Corporation
Priority to AU2003277439A priority Critical patent/AU2003277439A1/en
Priority to BR0315364-9A priority patent/BR0315364A/en
Priority to JP2004545509A priority patent/JP2006503505A/en
Priority to EP03809155A priority patent/EP1552678A2/en
Priority to EA200500667A priority patent/EA200500667A1/en
Priority to CA002502107A priority patent/CA2502107A1/en
Priority to MXPA05004090A priority patent/MXPA05004090A/en
Publication of WO2004036813A2 publication Critical patent/WO2004036813A2/en
Publication of WO2004036813A3 publication Critical patent/WO2004036813A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/02—Adaptations of transformers or inductances for specific applications or functions for non-linear operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/32—Non-reciprocal transmission devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0138—Electrical filters or coupling circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/36—Repeater circuits
    • H04B3/38—Repeater circuits for signals in two different frequency ranges transmitted in opposite directions over the same transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/06—Fixed inductances of the signal type  with magnetic core with core substantially closed in itself, e.g. toroid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H01F2038/143—Inductive couplings for signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0092—Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H2007/013—Notch or bandstop filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5408—Methods of transmitting or receiving signals via power distribution lines using protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5479—Systems for power line communications using repeaters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5491—Systems for power line communications using filtering and bypassing

Definitions

  • the present invention relates to communications, and more particularly, to an arrangement of for communications on a bi-directional medium.
  • the arrangement is suited for communications over a power line.
  • communications media are characterized by a single signal medium whose physical continuity cannot be interrupted.
  • communications transducers that are totally bidirectional, as opposed to being omni-directional, or have very limited directionality. Examples include energized electrical power wires, gasses and fluids confined to pipes, and certain optical media.
  • a signal is coupled to a wire in a non-directional manner, that is, the signal may propagate in both directions along a wire. Often, one direction is an intended direction and the other direction is unintended.
  • a signal to noise ratio will deteriorate to a point that a repeater is necessary to allow data represented by the signal to be conveyed at reasonable quality beyond that point.
  • a receiver can receive signals from both directions, and the possibility exists for signals propagating in an unintended direction to interfere with intended signals. If multiple frequency bands are available, then the repeater may receive at one frequency and retransmit at another frequency. However, even this arrangement does not ensure immunity from interference, especially if the level of the intended signal is similar to that of the unintended signal, due to similar attenuations between the respective transmitters and the receiver.
  • the present invention relates to communications, and more particularly, to an arrangement of repeaters for communications on a bi-directional medium.
  • the system includes a first repeater, a second repeater, a third repeater and a fourth repeater, each of which is coupled to the medium.
  • the first repeater and the second repeater communicate with each other on a first band for a transmission from the first repeater to the second repeater, and on a second band for a transmission from the second repeater to the first repeater.
  • the second repeater and the third repeater communicate with each other on a third band for a transmission from the second repeater to the third repeater, and on a fourth band for a transmission from the third repeater to the second repeater.
  • the third repeater and the fourth repeater communicate with each other on the second band for a transmission from the third repeater to the fourth repeater, and on the first band for a transmission from the fourth repeater to the third repeater.
  • Fig. 1 is a block diagram of a configuration of repeaters in a power line communication system. DESCRIPTION OF THE INVENTION
  • the present invention relates to communications, and more particularly, to an arrangement of repeaters for communications on a bi-directional medium.
  • the arrangement is described herein in the context of a power line communications system, but can be used on any bi-directional medium, and is particularly well suited for full duplex communications over a single continuous bi-directional medium.
  • Fig. 1 is a block diagram of a configuration of repeaters in a power line communication system 100.
  • System 100 includes a head-end (HE) 700, a Repeater A 705, a Repeater B 710, a Repeater C 715, and a Repeater D 720.
  • HE head-end
  • a selection of frequency bands can be used at the various repeaters, so as to reduce an amplitude of an unintended signal relative to that of an intended signal.
  • HE 700 transmits to Repeater A 705 on frequency Band 1 and listens on Band 2.
  • Repeater A 705 listens to HE 700 on Band 1 and transmits to HE 700 on Band 2. Repeater A 705 also transmits to Repeater B 710 on Band 3, and listens to Repeater B 710 on Band 4.
  • Repeater B 710 listens to Repeater A 705 on Band 3, and transmits to Repeater A 705 on Band 4.
  • Repeater B 710 also transmits to Repeater C 715 on Band 2, and listens to Repeater C 715 on Band 1.
  • Repeater C 715 listens to Repeater B 710 on Band 2, and transmits to Repeater B 710 on Band 1.
  • Repeater C 715 also transmits to Repeater D 720 on Band 4, and listens to Repeater D 720 on Band 3.
  • Repeater B 710 By arranging Repeater B 710 to transmit to Repeater C 715 on Band 2 while listening on Band 1, an unintended path 725 for a Band 1 signal from Repeater C 715, traverses two wire segments, namely a wire segment B-C 780 and a wire segment A-B 755.
  • the Band 1 receiver at Repeater A 705 receives its intended signal from HE 700, which traverses one wire segment, namely a wire segment HE-A 750, while the unintended signal from Repeater C is likely to be more attenuated, having traversed two wire segments. Similarly, other unintended paths 760, 765, 770 and 775 span two wire segments, and thus attenuate unintended signals.
  • HE 700 as a first repeater
  • Repeater A 705 as a second repeater
  • Repeater B 710 as a third repeater
  • Repeater C 715 as a fourth repeater.
  • the system thus includes a first repeater, a second repeater, a third repeater and a fourth repeater, each of which is coupled to the medium.
  • the first repeater and the second repeater communicate with each other on a first band for a transmission from the first repeater to the second repeater, and on a second band for a transmission from the second repeater to the first repeater.
  • the second repeater and the third repeater communicate with each other on a third band for a transmission from the second repeater to the third repeater, and on a fourth band for a transmission from the third repeater to the second repeater.
  • the third repeater and the fourth repeater communicate with each other on the second band for a transmission from the third repeater to the fourth repeater, and on the first band for a transmission from the fourth repeater to the third repeater.

Abstract

A system (100) for communications on a bi-directional medium includes a first repeater (705), a second repeater (710), a third repeater (715) and a fourth repeater (720), each of which is coupled to the medium. The first repeater and the second repeater communicate with each other on a first band for transmission from the first repeater to the second repeater, and on a second band for transmission from the second repeater to the first repeater. The second repeater and the third repeater communicate with each other on a third band for transmission from the second repeater to the third repeater, and on a fourth band for transmission from the third repeater to the second repeater. The third repeater and the fourth repeater communicate with each other on the second band for transmission from the third repeater to the fourth repeater, and on the first band for transmission from the fourth repeater to the third repeater.

Description

REPEATERS SHARING A COMMON MEDIUM FOR COMMUNICATIONS
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to communications, and more particularly, to an arrangement of for communications on a bi-directional medium. The arrangement is suited for communications over a power line.
2. Description of the Related Art
Many types of communications media are characterized by a single signal medium whose physical continuity cannot be interrupted. There are also communications transducers that are totally bidirectional, as opposed to being omni-directional, or have very limited directionality. Examples include energized electrical power wires, gasses and fluids confined to pipes, and certain optical media.
For example, for power line communications, a signal is coupled to a wire in a non-directional manner, that is, the signal may propagate in both directions along a wire. Often, one direction is an intended direction and the other direction is unintended.
At some distance from a signal source of a signal, a signal to noise ratio will deteriorate to a point that a repeater is necessary to allow data represented by the signal to be conveyed at reasonable quality beyond that point. For a full duplex modem that is continuously transmitting, a receiver can receive signals from both directions, and the possibility exists for signals propagating in an unintended direction to interfere with intended signals. If multiple frequency bands are available, then the repeater may receive at one frequency and retransmit at another frequency. However, even this arrangement does not ensure immunity from interference, especially if the level of the intended signal is similar to that of the unintended signal, due to similar attenuations between the respective transmitters and the receiver.
SUMMARY OF THE INVENTION
The present invention relates to communications, and more particularly, to an arrangement of repeaters for communications on a bi-directional medium. The system includes a first repeater, a second repeater, a third repeater and a fourth repeater, each of which is coupled to the medium. The first repeater and the second repeater communicate with each other on a first band for a transmission from the first repeater to the second repeater, and on a second band for a transmission from the second repeater to the first repeater. The second repeater and the third repeater communicate with each other on a third band for a transmission from the second repeater to the third repeater, and on a fourth band for a transmission from the third repeater to the second repeater. The third repeater and the fourth repeater communicate with each other on the second band for a transmission from the third repeater to the fourth repeater, and on the first band for a transmission from the fourth repeater to the third repeater.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a block diagram of a configuration of repeaters in a power line communication system. DESCRIPTION OF THE INVENTION
The present invention relates to communications, and more particularly, to an arrangement of repeaters for communications on a bi-directional medium. The arrangement is described herein in the context of a power line communications system, but can be used on any bi-directional medium, and is particularly well suited for full duplex communications over a single continuous bi-directional medium.
Fig. 1 is a block diagram of a configuration of repeaters in a power line communication system 100. System 100 includes a head-end (HE) 700, a Repeater A 705, a Repeater B 710, a Repeater C 715, and a Repeater D 720. A selection of frequency bands can be used at the various repeaters, so as to reduce an amplitude of an unintended signal relative to that of an intended signal.
HE 700 transmits to Repeater A 705 on frequency Band 1 and listens on Band 2.
Repeater A 705 listens to HE 700 on Band 1 and transmits to HE 700 on Band 2. Repeater A 705 also transmits to Repeater B 710 on Band 3, and listens to Repeater B 710 on Band 4.
Repeater B 710 listens to Repeater A 705 on Band 3, and transmits to Repeater A 705 on Band 4. Repeater B 710 also transmits to Repeater C 715 on Band 2, and listens to Repeater C 715 on Band 1.
Repeater C 715 listens to Repeater B 710 on Band 2, and transmits to Repeater B 710 on Band 1. Repeater C 715 also transmits to Repeater D 720 on Band 4, and listens to Repeater D 720 on Band 3. By arranging Repeater B 710 to transmit to Repeater C 715 on Band 2 while listening on Band 1, an unintended path 725 for a Band 1 signal from Repeater C 715, traverses two wire segments, namely a wire segment B-C 780 and a wire segment A-B 755. The Band 1 receiver at Repeater A 705 receives its intended signal from HE 700, which traverses one wire segment, namely a wire segment HE-A 750, while the unintended signal from Repeater C is likely to be more attenuated, having traversed two wire segments. Similarly, other unintended paths 760, 765, 770 and 775 span two wire segments, and thus attenuate unintended signals.
There is thus provided a system for communications on a bi-directional medium. For purpose of illustration, regard HE 700 as a first repeater, Repeater A 705 as a second repeater, Repeater B 710 as a third repeater, and Repeater C 715 as a fourth repeater. The system thus includes a first repeater, a second repeater, a third repeater and a fourth repeater, each of which is coupled to the medium. The first repeater and the second repeater communicate with each other on a first band for a transmission from the first repeater to the second repeater, and on a second band for a transmission from the second repeater to the first repeater. The second repeater and the third repeater communicate with each other on a third band for a transmission from the second repeater to the third repeater, and on a fourth band for a transmission from the third repeater to the second repeater. The third repeater and the fourth repeater communicate with each other on the second band for a transmission from the third repeater to the fourth repeater, and on the first band for a transmission from the fourth repeater to the third repeater.
It should be understood that various alternatives, combinations and modifications of the teachings described herein could be devised by those skilled in the art. The present invention is intended to embrace all such alternatives, modifications and variances that fall within the scope of the appended claims.

Claims

WHAT IS CLAIMED IS:
1. A system for communications on a bi-directional medium, comprising: a first repeater, a second repeater, a third repeater and a fourth repeater, each of which is coupled to said medium, wherein said first repeater and said second repeater communicate with each other on a first band for a transmission from said first repeater to said second repeater, and on a second band for a transmission from said second repeater to said first repeater, wherein said second repeater and said third repeater communicate with each other on a third band for a transmission from said second repeater to said third repeater, and on a fourth band for a transmission from said third repeater to said second repeater, and wherein said third repeater and said fourth repeater communicate with each other on said second band for a transmission from said third repeater to said fourth repeater, and on said first band for a transmission from said fourth repeater to said third repeater.
2. The system of claim 1, wherein said medium is a power line.
PCT/US2003/033082 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications WO2004036813A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU2003277439A AU2003277439A1 (en) 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications
BR0315364-9A BR0315364A (en) 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications
JP2004545509A JP2006503505A (en) 2002-10-17 2003-10-17 Repeater sharing a common medium for communication
EP03809155A EP1552678A2 (en) 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications
EA200500667A EA200500667A1 (en) 2002-10-17 2003-10-17 REPEATERS USING A COMMON MEDIA FOR COMMUNICATIONS
CA002502107A CA2502107A1 (en) 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications
MXPA05004090A MXPA05004090A (en) 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US41917402P 2002-10-17 2002-10-17
US60/419,174 2002-10-17

Publications (2)

Publication Number Publication Date
WO2004036813A2 true WO2004036813A2 (en) 2004-04-29
WO2004036813A3 WO2004036813A3 (en) 2004-09-10

Family

ID=32108037

Family Applications (4)

Application Number Title Priority Date Filing Date
PCT/US2003/033082 WO2004036813A2 (en) 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications
PCT/US2003/033188 WO2004036601A2 (en) 2002-10-17 2003-10-17 Highly insulated inductive data couplers
PCT/US2003/033081 WO2004036879A2 (en) 2002-10-17 2003-10-17 Filter for segmenting power lines for communications
PCT/US2003/033080 WO2004036772A2 (en) 2002-10-17 2003-10-17 Arrangement of a data coupler for power line communications

Family Applications After (3)

Application Number Title Priority Date Filing Date
PCT/US2003/033188 WO2004036601A2 (en) 2002-10-17 2003-10-17 Highly insulated inductive data couplers
PCT/US2003/033081 WO2004036879A2 (en) 2002-10-17 2003-10-17 Filter for segmenting power lines for communications
PCT/US2003/033080 WO2004036772A2 (en) 2002-10-17 2003-10-17 Arrangement of a data coupler for power line communications

Country Status (11)

Country Link
US (5) US7109835B2 (en)
EP (4) EP1561226A4 (en)
JP (4) JP2006507721A (en)
KR (4) KR20050055763A (en)
CN (4) CN1706176A (en)
AU (3) AU2003301390A1 (en)
BR (4) BR0315307A (en)
CA (4) CA2502547C (en)
EA (4) EA007883B1 (en)
MX (4) MXPA05003903A (en)
WO (4) WO2004036813A2 (en)

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US20050020233A1 (en) 2005-01-27

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