WO1990015492A3 - Star-wired ring lan - Google Patents

Star-wired ring lan Download PDF

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Publication number
WO1990015492A3
WO1990015492A3 PCT/GB1990/000886 GB9000886W WO9015492A3 WO 1990015492 A3 WO1990015492 A3 WO 1990015492A3 GB 9000886 W GB9000886 W GB 9000886W WO 9015492 A3 WO9015492 A3 WO 9015492A3
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
link
port
template
bypass
Prior art date
Application number
PCT/GB1990/000886
Other languages
French (fr)
Other versions
WO1990015492A2 (en
Inventor
John Hill Boal
Original Assignee
Racal Milgo 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 Racal Milgo Ltd filed Critical Racal Milgo Ltd
Publication of WO1990015492A2 publication Critical patent/WO1990015492A2/en
Priority to FI915737A priority Critical patent/FI915737A0/en
Priority to NO91914817A priority patent/NO914817L/en
Publication of WO1990015492A3 publication Critical patent/WO1990015492A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/427—Loop networks with decentralised control
    • H04L12/43—Loop networks with decentralised control with synchronous transmission, e.g. time division multiplex [TDM], slotted rings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration

Abstract

A hybrid star LAN has an access unit (1) with a port (30) associated with each terminal (2), the port comprising a port input (8) and output (9). A terminal link (3S, 3R) links the terminal to the port. A bypass link (11) is in parallel with the terminal link, and the time delays of the terminal link and the bypass link are matched by appropriate registers (11, 13). A comparator (14) compares the outputs of the terminal and bypass links to detect errors through the terminal link and controls a selector switch (12). On the LAN, channels are constituted by varying numbers of TDM slots, as defined by a template stored in the access unit. Each terminal stores that part of the template which defines channels which it can use. Each terminal can also store a second or background template which can be swapped in for the current or foreground template when a change of allocation is desired.
PCT/GB1990/000886 1989-06-07 1990-06-07 Star-wired ring lan WO1990015492A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI915737A FI915737A0 (en) 1989-06-07 1991-12-05 STJAERNKOPPLAT RINGLOKALNAET.
NO91914817A NO914817L (en) 1989-06-07 1991-12-06 STAR WIRELESS CALL LOCATION

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898913126A GB8913126D0 (en) 1989-06-07 1989-06-07 Improvements in local area networks
GB8913126.2 1989-06-07

Publications (2)

Publication Number Publication Date
WO1990015492A2 WO1990015492A2 (en) 1990-12-13
WO1990015492A3 true WO1990015492A3 (en) 1992-07-23

Family

ID=10658058

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/000886 WO1990015492A2 (en) 1989-06-07 1990-06-07 Star-wired ring lan

Country Status (7)

Country Link
EP (1) EP0475989A1 (en)
JP (1) JPH05501483A (en)
AU (1) AU5676090A (en)
CA (1) CA2058951A1 (en)
FI (1) FI915737A0 (en)
GB (1) GB8913126D0 (en)
WO (1) WO1990015492A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985962A (en) * 1971-08-13 1976-10-12 International Business Machines Corporation Method of information transmission with priority scheme in a time-division multiplex communication system comprising a loop line
US4279034A (en) * 1979-11-15 1981-07-14 Bell Telephone Laboratories, Incorporated Digital communication system fault isolation circuit
EP0068595A1 (en) * 1981-01-12 1983-01-05 General Datacomm Industries, Inc. A bit-interleaved time division multiplexer
DE3304823A1 (en) * 1983-02-11 1984-08-16 Siemens AG, 1000 Berlin und 8000 München METHOD FOR A TELECOMMUNICATION, IN PARTICULAR TELEPHONE EXTENSION PLANT WITH A DATA TRANSFER LINE SYSTEM, IN PARTICULAR WITH AN OPTICAL DATA TRANSMISSION LINE SYSTEM
US4779261A (en) * 1985-09-24 1988-10-18 Kabushiki Kaisha Toshiba Loop network

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985962A (en) * 1971-08-13 1976-10-12 International Business Machines Corporation Method of information transmission with priority scheme in a time-division multiplex communication system comprising a loop line
US4279034A (en) * 1979-11-15 1981-07-14 Bell Telephone Laboratories, Incorporated Digital communication system fault isolation circuit
EP0068595A1 (en) * 1981-01-12 1983-01-05 General Datacomm Industries, Inc. A bit-interleaved time division multiplexer
DE3304823A1 (en) * 1983-02-11 1984-08-16 Siemens AG, 1000 Berlin und 8000 München METHOD FOR A TELECOMMUNICATION, IN PARTICULAR TELEPHONE EXTENSION PLANT WITH A DATA TRANSFER LINE SYSTEM, IN PARTICULAR WITH AN OPTICAL DATA TRANSMISSION LINE SYSTEM
US4779261A (en) * 1985-09-24 1988-10-18 Kabushiki Kaisha Toshiba Loop network

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM Technical Disclosure Bulletin, volume 14, no. 2, July 1971, (New York, US), E.N. Barnes et al.: "Bypass function for stations on a closed communication loop", page 488 *

Also Published As

Publication number Publication date
WO1990015492A2 (en) 1990-12-13
GB8913126D0 (en) 1989-07-26
AU5676090A (en) 1991-01-07
CA2058951A1 (en) 1990-12-08
FI915737A0 (en) 1991-12-05
JPH05501483A (en) 1993-03-18
EP0475989A1 (en) 1992-03-25

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