CA2502107A1 - Repeaters sharing a common medium for communications - Google Patents

Repeaters sharing a common medium for communications Download PDF

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Publication number
CA2502107A1
CA2502107A1 CA002502107A CA2502107A CA2502107A1 CA 2502107 A1 CA2502107 A1 CA 2502107A1 CA 002502107 A CA002502107 A CA 002502107A CA 2502107 A CA2502107 A CA 2502107A CA 2502107 A1 CA2502107 A1 CA 2502107A1
Authority
CA
Canada
Prior art keywords
repeater
band
transmission
communications
repeaters
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.)
Abandoned
Application number
CA002502107A
Other languages
French (fr)
Inventor
Yehuda Cern
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.)
Individual
Original Assignee
Ambient Corp USA
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 Corp USA filed Critical Ambient Corp USA
Publication of CA2502107A1 publication Critical patent/CA2502107A1/en
Abandoned legal-status Critical Current

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

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

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12/0812004 15:09 2033276401 OHLANDT GREELEY PAGE 08108 liIJ~~ATER~ SR~R~NG A. CO1V~I~tN MEIyF(7R
CO~CATION~
I~~hC~GROUN.C~ OF T~IIllrlYEN~'Zi~N
I. pield. of tlxe Invetxtion Tfte present invention relates tc~ coxnmunxcations, and more particularly, to an. arrangement of repeaters for comrniu'xxoations on a bi-dixeotional xncdittrr~. The ..~ I ~ ~,~g~~t is suuited fox,' cvmmu~uiaations over a power line.
2. l7escxi.ption o;~the Itelatetl Art Matxy types of communications rAxedia are characterix~d by a single signal tedium wrlxose physx~al conty~tuity cannot be interrupted. Tixe~te are also cortaznunicaiaioxxs transducers that arc totally bidirection~al, as opposed to being amni-directional, or have very limited direetionalxty. Examples inahide energized electrical p4wer wires, gasses atzd fluids canned to pipes, and certain optical media, For example, for power line coxnumunicatioxzs, ~. signal is coupled to a wire in a noo-directional manner, that is, the sitg~ial may propagate in both directions along a ~vxxe. Often, ore directiozt is an intet'tded direction and the other ~ii~rection is unintended.
At some distance frorxr a signal souse of a signal, a signal to noise ratio will deteriorate to a point that a repeater is necessary to allow' dataf represented I'~v tbte signa.I to ire conveyed at reasonable rlualzty beyond that point. Far a :Full duplex modet><t that is carttiunuously trartsxnitting, a receiver can receive signals from hotlx ~0 directions, and the p4ssibility exists fQr signals propagating in axe urdx~tendcd dixeofion to interfere with ixttended signals.

PAGE 8I8 ~ RCIfD AT 121812004 3:1:25 PM (Eastern Standard Timed ~ SYR:USPTOf FXRF~211 x DNIS:74B5092"CSID:2033276401 ~ DURATION ~mm~s~:02~48 AMEN~E~ SHEET
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 corninunications 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 Bmd 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 l, 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

as a fourth repeater. The system thus includes a first repeater, a second repeaters 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 (2)

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.
CA002502107A 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications Abandoned CA2502107A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US41917402P 2002-10-17 2002-10-17
US60/419,174 2002-10-17
PCT/US2003/033082 WO2004036813A2 (en) 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications

Publications (1)

Publication Number Publication Date
CA2502107A1 true CA2502107A1 (en) 2004-04-29

Family

ID=32108037

Family Applications (4)

Application Number Title Priority Date Filing Date
CA2502547A Expired - Fee Related CA2502547C (en) 2002-10-17 2003-10-17 Highly insulated inductive data couplers
CA002502122A Abandoned CA2502122A1 (en) 2002-10-17 2003-10-17 Filter for segmenting power lines for communications
CA002502107A Abandoned CA2502107A1 (en) 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications
CA002502104A Abandoned CA2502104A1 (en) 2002-10-17 2003-10-17 Arrangement of a data coupler for power line communications

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA2502547A Expired - Fee Related CA2502547C (en) 2002-10-17 2003-10-17 Highly insulated inductive data couplers
CA002502122A Abandoned CA2502122A1 (en) 2002-10-17 2003-10-17 Filter for segmenting power lines for communications

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002502104A Abandoned CA2502104A1 (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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