CA2025521A1 - Dynamically responsive catv system with shared fiber optic link - Google Patents

Dynamically responsive catv system with shared fiber optic link

Info

Publication number
CA2025521A1
CA2025521A1 CA2025521A CA2025521A CA2025521A1 CA 2025521 A1 CA2025521 A1 CA 2025521A1 CA 2025521 A CA2025521 A CA 2025521A CA 2025521 A CA2025521 A CA 2025521A CA 2025521 A1 CA2025521 A1 CA 2025521A1
Authority
CA
Canada
Prior art keywords
terminal
subscriber
transmitted
signals
signal
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
CA2025521A
Other languages
French (fr)
Other versions
CA2025521C (en
Inventor
Woo H. Paik
David Grubb Iii
David Edward Charlton
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.)
Corning Inc
Arris Technology Inc
Original Assignee
Corning Inc
General Instrument Corp
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 Corning Inc, General Instrument Corp filed Critical Corning Inc
Publication of CA2025521A1 publication Critical patent/CA2025521A1/en
Application granted granted Critical
Publication of CA2025521C publication Critical patent/CA2025521C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/69—Optical systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0226—Fixed carrier allocation, e.g. according to service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0228—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
    • H04J14/023—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
    • H04J14/0232—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON] for downstream transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17345—Control of the passage of the selected programme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17345—Control of the passage of the selected programme
    • H04N7/17363—Control of the passage of the selected programme at or near the user terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0298—Wavelength-division multiplex systems with sub-carrier multiplexing [SCM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N2007/1739—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal the upstream communication being transmitted via a separate link, e.g. telephone line

Abstract

A CATV system uses a single single-mode optical fiber for transmitting a composite optical signal containing television signals in different frequency channels for a plurality of subscriber terminals from a headend terminal to a distribution terminal, and converts the transmitted signals at the distribution terminal into electrical signals for distribution to a plurality of subscriber terminals over a plurality of coaxial cables. The distribution terminal further receives electrical service request signals from each of the plurality of subscriber terminals, and convert each received service request signal into an optical service requestsignal for transmission to the headend terminal over the same single-mode optical fiber as used from transmitting the composite optical signal. Wavelength-division multiplexer/demultiplexers couple the optical fiber to the headend terminal and the distribution terminal to enable bidirectional transmission. The subscriber terminal is responsive to a control signal transmitted to the subscriber terminal for enabling a receiver therein to receive television signals transmitted to the subscriber terminal over a selected one of said different given frequency channels. The headend terminal includes a digital switch that is operated in coordination with the control signals that are transmitted to the subscriber terminals for enabling reception of only selected frequency channels in the respective subscriber terminals, by frequency positioning the television signal indicated by the service request signal received from a given subscriber terminal within the composite signal for transmission to the given subscriber terminal over the given frequency channel enabled by the control signal that is transmitted to the given subscriber terminal.
CA002025521A 1989-09-19 1990-09-17 Dynamically responsive catv system with shared fiber optic link Expired - Lifetime CA2025521C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/409,214 1989-09-19
US07/409,214 US5136411A (en) 1987-12-11 1989-09-19 Dynamically responsive CATV system with shared fiber optic link

Publications (2)

Publication Number Publication Date
CA2025521A1 true CA2025521A1 (en) 1991-03-20
CA2025521C CA2025521C (en) 1998-01-06

Family

ID=23619526

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002025521A Expired - Lifetime CA2025521C (en) 1989-09-19 1990-09-17 Dynamically responsive catv system with shared fiber optic link

Country Status (11)

Country Link
US (1) US5136411A (en)
EP (1) EP0419137B1 (en)
JP (1) JP3305710B2 (en)
KR (1) KR940006733B1 (en)
AU (1) AU620735B2 (en)
CA (1) CA2025521C (en)
DE (1) DE69024006T2 (en)
DK (1) DK0419137T3 (en)
FI (1) FI98030C (en)
NO (1) NO179889C (en)
NZ (1) NZ235309A (en)

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Also Published As

Publication number Publication date
US5136411A (en) 1992-08-04
AU6254690A (en) 1991-05-23
EP0419137A2 (en) 1991-03-27
FI98030B (en) 1996-12-13
DE69024006T2 (en) 1996-05-15
JPH03167987A (en) 1991-07-19
JP3305710B2 (en) 2002-07-24
EP0419137A3 (en) 1992-04-15
FI904397A0 (en) 1990-09-06
KR940006733B1 (en) 1994-07-27
NO179889B (en) 1996-09-23
NO179889C (en) 1997-01-02
CA2025521C (en) 1998-01-06
KR910007368A (en) 1991-04-30
DE69024006D1 (en) 1996-01-18
NZ235309A (en) 1992-12-23
NO904042D0 (en) 1990-09-17
AU620735B2 (en) 1992-02-20
EP0419137B1 (en) 1995-12-06
NO904042L (en) 1991-03-20
FI98030C (en) 1997-03-25
DK0419137T3 (en) 1996-04-29

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