GB2016247A - Improved method of signalling supervisory information in digital line transmission systems - Google Patents

Improved method of signalling supervisory information in digital line transmission systems

Info

Publication number
GB2016247A
GB2016247A GB7906165A GB7906165A GB2016247A GB 2016247 A GB2016247 A GB 2016247A GB 7906165 A GB7906165 A GB 7906165A GB 7906165 A GB7906165 A GB 7906165A GB 2016247 A GB2016247 A GB 2016247A
Authority
GB
United Kingdom
Prior art keywords
bit
combinations
line transmission
coding
codes
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
GB7906165A
Other versions
GB2016247B (en
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB7906165A priority Critical patent/GB2016247B/en
Publication of GB2016247A publication Critical patent/GB2016247A/en
Application granted granted Critical
Publication of GB2016247B publication Critical patent/GB2016247B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4906—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes
    • H04L25/4908—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes using mBnB codes

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

In a line transmission system supervisory information is required in addition to digital information. Normally a separate transmission channel is required to transmit this information. The coding system of this proposal removes the requirement for an additional signalling channel. The method used requires that the line transmission coding employed should have more combinations than the coding of the data to be used (i.e. (2N-1) B->2NB). For example in optical fibre transmission systems it is usual to use line codes such as 3B 4B. In such a coding system there are 14 zero or 1 bit disparity codes which are available for mapping onto the eight "tri-bit" combinations of the data to be transmitted. Accordingly four illegal (i.e. unused) code combinations exist. Selective use of a pair of these illegal codes for the same pair of tri-bit combinations can be used to send a one bit supervisory signal.
GB7906165A 1978-03-04 1979-02-21 Method of signalling supervisory information in digital line transmission systems Expired GB2016247B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7906165A GB2016247B (en) 1978-03-04 1979-02-21 Method of signalling supervisory information in digital line transmission systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB867578 1978-03-04
GB7906165A GB2016247B (en) 1978-03-04 1979-02-21 Method of signalling supervisory information in digital line transmission systems

Publications (2)

Publication Number Publication Date
GB2016247A true GB2016247A (en) 1979-09-19
GB2016247B GB2016247B (en) 1982-03-31

Family

ID=26242338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7906165A Expired GB2016247B (en) 1978-03-04 1979-02-21 Method of signalling supervisory information in digital line transmission systems

Country Status (1)

Country Link
GB (1) GB2016247B (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2469047A1 (en) * 1979-11-02 1981-05-08 Sony Corp METHOD AND APPARATUS FOR ENCODING A DIGITAL SIGNAL SO THAT IT PRESENTS A LOW DIRECT CURRENT COMPONENT, AS WELL AS FOR DECODING IT
WO1984003598A1 (en) * 1983-03-09 1984-09-13 Telephonie Ind Commerciale Method and devices for transcoding binary informations for timedivision multiplex transmission
GB2196517A (en) * 1986-10-01 1988-04-27 Gen Electric Plc Signal labelling
EP0430052A2 (en) * 1989-12-01 1991-06-05 National Semiconductor Corporation Code points for transferring data from a network transmission medium to a station on the network
EP0514777A2 (en) * 1991-05-20 1992-11-25 Fujitsu Limited A disparity detection circuit for a 2-bit to 4-bit coded signal decoder
EP0556983A1 (en) * 1992-02-21 1993-08-25 Advanced Micro Devices, Inc. 8B/10B encoder
US5387911A (en) * 1992-02-21 1995-02-07 Gleichert; Marc C. Method and apparatus for transmitting and receiving both 8B/10B code and 10B/12B code in a switchable 8B/10B transmitter and receiver
EP1450530A3 (en) * 2003-02-12 2004-09-08 Broadcom Corporation Method to overlay a secondary communication channel onto an encoded primary communication channel
EP1469645A1 (en) * 2003-04-15 2004-10-20 Broadcom Corporation Synchronous encryption and encoding using tables
EP1484888A2 (en) * 2003-06-04 2004-12-08 Broadcom Corporation Method and system to provide blade server load balancing using spare link bandwidth
EP1484872A2 (en) * 2003-06-04 2004-12-08 Broadcom Corporation Method and system to provide word-level flow control using spare link bandwidth
FR2896310A1 (en) * 2006-01-19 2007-07-20 Snr Roulements Sa High speed information coding method for e.g. electronically commuted motor, involves delivering three signals on channels, where one of signals is delivered by combination of two signals by AND operator to form binary triplets

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2469047A1 (en) * 1979-11-02 1981-05-08 Sony Corp METHOD AND APPARATUS FOR ENCODING A DIGITAL SIGNAL SO THAT IT PRESENTS A LOW DIRECT CURRENT COMPONENT, AS WELL AS FOR DECODING IT
WO1984003598A1 (en) * 1983-03-09 1984-09-13 Telephonie Ind Commerciale Method and devices for transcoding binary informations for timedivision multiplex transmission
EP0119140A1 (en) * 1983-03-09 1984-09-19 LA TELEPHONIE INDUSTRIELLE ET COMMERCIALE TELIC ALCATEL Société Anonyme dite: Method and apparatus for transcoding binary information for time domain multiplex transmission
GB2196517A (en) * 1986-10-01 1988-04-27 Gen Electric Plc Signal labelling
GB2196517B (en) * 1986-10-01 1990-08-29 Gen Electric Plc Signal labelling
EP0430052A3 (en) * 1989-12-01 1992-04-15 National Semiconductor Corporation Code points for transferring data from a network transmission medium to a station on the network
EP0430052A2 (en) * 1989-12-01 1991-06-05 National Semiconductor Corporation Code points for transferring data from a network transmission medium to a station on the network
EP0514777A2 (en) * 1991-05-20 1992-11-25 Fujitsu Limited A disparity detection circuit for a 2-bit to 4-bit coded signal decoder
JPH04342314A (en) * 1991-05-20 1992-11-27 Fujitsu Ltd Disparity detecting circuit for 2b/4b code rule inverse conversion
EP0514777A3 (en) * 1991-05-20 1993-06-16 Fujitsu Limited A disparity detection circuit for a 2-bit to 4-bit coded signal decoder
US5283576A (en) * 1991-05-20 1994-02-01 Fujitsu Limited Disparity detection circuit for a 2-bit to 4-bit coded signal decoder
JP2691480B2 (en) 1991-05-20 1997-12-17 富士通株式会社 Disparity detection circuit in 2B4B code rule inverse conversion
EP0556983A1 (en) * 1992-02-21 1993-08-25 Advanced Micro Devices, Inc. 8B/10B encoder
US5387911A (en) * 1992-02-21 1995-02-07 Gleichert; Marc C. Method and apparatus for transmitting and receiving both 8B/10B code and 10B/12B code in a switchable 8B/10B transmitter and receiver
EP1450530A3 (en) * 2003-02-12 2004-09-08 Broadcom Corporation Method to overlay a secondary communication channel onto an encoded primary communication channel
US7730296B2 (en) 2003-02-12 2010-06-01 Broadcom Corporation Method and system for providing synchronous running encoding and encryption
US8102874B2 (en) 2003-02-12 2012-01-24 Broadcom Corporation Method and system to provide blade server load balancing using spare link bandwidth
US8024558B2 (en) 2003-02-12 2011-09-20 Broadcom Corporation Method and system for providing synchronous running encoding and encryption
US6859154B2 (en) 2003-02-12 2005-02-22 Broadcom Corporation Method to overlay a secondary communication channel onto an encoded primary communication channel
US7835363B2 (en) 2003-02-12 2010-11-16 Broadcom Corporation Method and system to provide blade server load balancing using spare link bandwidth
US7535836B2 (en) 2003-02-12 2009-05-19 Broadcom Corporation Method and system to provide word-level flow control using spare link bandwidth
EP1469645A1 (en) * 2003-04-15 2004-10-20 Broadcom Corporation Synchronous encryption and encoding using tables
EP1484872A3 (en) * 2003-06-04 2006-03-29 Broadcom Corporation Method and system to provide word-level flow control using spare link bandwidth
EP1484888A3 (en) * 2003-06-04 2006-03-29 Broadcom Corporation Method and system to provide blade server load balancing using spare link bandwidth
EP1484872A2 (en) * 2003-06-04 2004-12-08 Broadcom Corporation Method and system to provide word-level flow control using spare link bandwidth
EP1484888A2 (en) * 2003-06-04 2004-12-08 Broadcom Corporation Method and system to provide blade server load balancing using spare link bandwidth
FR2896310A1 (en) * 2006-01-19 2007-07-20 Snr Roulements Sa High speed information coding method for e.g. electronically commuted motor, involves delivering three signals on channels, where one of signals is delivered by combination of two signals by AND operator to form binary triplets
EP1811270A1 (en) * 2006-01-19 2007-07-25 Snr Roulements Encoding method and device for determining an absolute angular position

Also Published As

Publication number Publication date
GB2016247B (en) 1982-03-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee