CA2055242A1 - Route switching system in communications network - Google Patents

Route switching system in communications network

Info

Publication number
CA2055242A1
CA2055242A1 CA2055242A CA2055242A CA2055242A1 CA 2055242 A1 CA2055242 A1 CA 2055242A1 CA 2055242 A CA2055242 A CA 2055242A CA 2055242 A CA2055242 A CA 2055242A CA 2055242 A1 CA2055242 A1 CA 2055242A1
Authority
CA
Canada
Prior art keywords
route
cells
switching
receiver
switch
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
CA2055242A
Other languages
French (fr)
Other versions
CA2055242C (en
Inventor
Hiroaki Komine
Takafumi Chujo
Tetsuo Soejima
Keiji Miyazaki
Takao Ogura
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.)
Fujitsu Ltd
Original Assignee
Hiroaki Komine
Takafumi Chujo
Tetsuo Soejima
Keiji Miyazaki
Takao Ogura
Fujitsu Limited
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 Hiroaki Komine, Takafumi Chujo, Tetsuo Soejima, Keiji Miyazaki, Takao Ogura, Fujitsu Limited filed Critical Hiroaki Komine
Publication of CA2055242A1 publication Critical patent/CA2055242A1/en
Application granted granted Critical
Publication of CA2055242C publication Critical patent/CA2055242C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/15—Interconnection of switching modules
    • H04L49/1515—Non-blocking multistage, e.g. Clos
    • H04L49/153—ATM switching fabrics having parallel switch planes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/55—Prevention, detection or correction of errors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5625—Operations, administration and maintenance [OAM]
    • H04L2012/5627—Fault tolerance and recovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5646—Cell characteristics, e.g. loss, delay, jitter, sequence integrity
    • H04L2012/5649—Cell delay or jitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/25—Routing or path finding in a switch fabric

Abstract

A route switching system in a communications network constituted of a transmitter and a receiver connected by a plurality of routes for switching a first route along which communication is being held by transmission of cells to a second route causing no blocking. The route switching system comprises a first switch provided in the transmitter for switching input cells from one route to another and outputting the cells, a first storage portion provided in the transmitter for storing the input cells, a second switch provided in the receiver for switching input cells from one route to another and outputting the cells, and a second storage portion provided in the receiver for storing the input cells. At the time when the route is switched over, the first switch is changed over so that the cells are transmitted through the first storage portion and, on the receiver side, the second switch is changed over so that the cells transmitted over the second route are stored into the second storage portion.
The transmitter includes a switching signal generating portion for outputting, at the time of route switching, a switching timing signal to the receiver side through the first switch, and the receiver includes a switching signal detecting portion for detecting the switching timing signal from the switching signal generating portion. When cells are stored into the first and second storage portions while the route is switched over, the cells are stored first into the second storage portion on the receiver side.
CA002055242A 1990-11-09 1991-11-08 Route switching system in communications network Expired - Fee Related CA2055242C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP30255790A JP2868609B2 (en) 1990-11-09 1990-11-09 Route switching method in communication network
JP2-302557 1990-11-09

Publications (2)

Publication Number Publication Date
CA2055242A1 true CA2055242A1 (en) 1992-05-10
CA2055242C CA2055242C (en) 1995-02-14

Family

ID=17910414

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002055242A Expired - Fee Related CA2055242C (en) 1990-11-09 1991-11-08 Route switching system in communications network

Country Status (5)

Country Link
US (1) US5268897A (en)
EP (1) EP0484940B1 (en)
JP (1) JP2868609B2 (en)
CA (1) CA2055242C (en)
DE (1) DE69129968T2 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5446924A (en) * 1993-05-03 1995-08-29 Motorola, Inc. Method for assuring data integrity during a repeater transition
US5479396A (en) * 1993-09-07 1995-12-26 Nec Corporation Redundant system having signal path operation function
FI95637C (en) * 1994-02-28 1996-02-26 Nokia Telecommunications Oy Procedure for route switching on a packet data connection
FI98772C (en) * 1994-02-28 1997-08-11 Nokia Telecommunications Oy Procedure for route switching on a packet data connection
DE4416718C2 (en) * 1994-05-11 1997-08-21 Siemens Ag Circuit arrangement for the trouble-free rerouting of a message cell stream to an alternative path
EP0700229B1 (en) * 1994-08-22 2006-06-28 Fujitsu Limited Connectionless communications system, test method, and intra-station control system
US5585850A (en) * 1994-10-31 1996-12-17 Schwaller; John Adaptive distribution system for transmitting wideband video data over narrowband multichannel wireless communication system
US5535191A (en) * 1995-06-28 1996-07-09 Seiko Communications Systems, Inc. Method and apparatus for switching between redundant hardware in a wireless data communication system
US5956342A (en) * 1995-07-19 1999-09-21 Fujitsu Network Communications, Inc. Priority arbitration for point-to-point and multipoint transmission
FR2737371A1 (en) * 1995-07-26 1997-01-31 Trt Telecom Radio Electr SECURITY BY DOUBLING AT LEAST CERTAIN LOGIC CHANNELS IN A TELECOMMUNICATIONS NETWORK
US5898671A (en) * 1995-09-14 1999-04-27 Fujitsu Network Communications, Inc. Transmitter controlled flow control for buffer allocation in wide area ATM networks
US5991298A (en) * 1996-01-16 1999-11-23 Fujitsu Network Communications, Inc. Reliable and flexible multicast mechanism for ATM networks
US5748905A (en) * 1996-08-30 1998-05-05 Fujitsu Network Communications, Inc. Frame classification using classification keys
US7054263B1 (en) * 2000-10-16 2006-05-30 Telefonaktiebolaget Lm Ericsson (Publ) Synchronous change of switchplane
US7906307B2 (en) 2003-12-24 2011-03-15 Danisco A/S Variant lipid acyltransferases and methods of making
EP2503740B1 (en) 2009-11-19 2018-05-30 Nec Corporation Transmission system, transmission method, and communication apparatus
EP2557726B1 (en) * 2010-04-09 2021-04-28 Nec Corporation Transmission system
JP6519162B2 (en) * 2014-12-04 2019-05-29 富士通株式会社 Transmission system, transmission time difference measurement method in transmission system, and node

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733296A (en) * 1956-01-31 Automatic line switching circuits
NL6402192A (en) * 1964-03-05 1965-09-06
US3500319A (en) * 1967-12-06 1970-03-10 Nederlanden Staat Apparatus to prevent loss of information in automatic channel switching device
JPS5815341A (en) * 1981-07-22 1983-01-28 Nec Corp Transmission diversity system
US4679189A (en) * 1985-11-27 1987-07-07 American Telephone And Telegraph Company Alternate routing arrangement
EP0234191B1 (en) * 1986-01-09 1993-12-29 Nec Corporation Packet-switched communications network with parallel virtual circuits for re-routing message packets
JP2611805B2 (en) * 1988-05-13 1997-05-21 日本電信電話株式会社 Transmission line switching method
JP2594132B2 (en) * 1988-09-22 1997-03-26 日本電信電話株式会社 Line switching method

Also Published As

Publication number Publication date
CA2055242C (en) 1995-02-14
JP2868609B2 (en) 1999-03-10
EP0484940A2 (en) 1992-05-13
DE69129968D1 (en) 1998-09-17
DE69129968T2 (en) 1999-01-28
EP0484940A3 (en) 1994-09-28
US5268897A (en) 1993-12-07
JPH04176230A (en) 1992-06-23
EP0484940B1 (en) 1998-08-12

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Legal Events

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EEER Examination request
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