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WO1997034428A2 - Architecture de commutation - Google Patents

Architecture de commutation Download PDF

Info

Publication number
WO1997034428A2
WO1997034428A2 PCT/GB1997/000607 GB9700607W WO9734428A2 WO 1997034428 A2 WO1997034428 A2 WO 1997034428A2 GB 9700607 W GB9700607 W GB 9700607W WO 9734428 A2 WO9734428 A2 WO 9734428A2
Authority
WO
WIPO (PCT)
Prior art keywords
optical
smaller
switch
shuffle
pathway
Prior art date
Application number
PCT/GB1997/000607
Other languages
English (en)
Other versions
WO1997034428A3 (fr
Inventor
Robert Spagnoletti
Terry Bricheno
James Wilson Parker
Original Assignee
Northern Telecom 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 Northern Telecom Limited filed Critical Northern Telecom Limited
Publication of WO1997034428A2 publication Critical patent/WO1997034428A2/fr
Publication of WO1997034428A3 publication Critical patent/WO1997034428A3/fr

Links

Classifications

    • 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
    • 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
    • H04L49/1553—Interconnection of ATM switching modules, e.g. ATM switching fabrics
    • H04L49/1592—Perfect Shuffle
    • 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
    • H04L49/253—Routing or path finding in a switch fabric using establishment or release of connections between ports
    • H04L49/255—Control mechanisms for ATM switching fabrics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • 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
    • H04L2012/5603—Access techniques
    • H04L2012/5604—Medium of transmission, e.g. fibre, cable, radio
    • H04L2012/5605—Fibre
    • 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
    • H04L2012/5678—Traffic aspects, e.g. arbitration, load balancing, smoothing, buffer management
    • H04L2012/5681—Buffer or queue management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0007—Construction
    • H04Q2011/0015—Construction using splitting combining
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0037—Operation
    • H04Q2011/0039—Electrical control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0037—Operation
    • H04Q2011/0049—Crosstalk reduction; Noise; Power budget
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0052—Interconnection of switches

Definitions

  • Each switch 10 has a buffer having an input port 11a and an output port 1 1b respectively for receiving ATM cells from, and transmitting ATM cells to, the outside world.
  • the buffers operate under the control of a core controller 12 established via control links 13, the controller 12 being common to all n smaller switches 10.
  • ATM cells are transferred from the input buffer 1 1 a to a transmitter block 14 where, according to the destination of the particular ATM cell concerned, a particular one of a set of n laser diodes 14a is energised.
  • the optical shuffle interconnects the fibres of the ribbons 15 and 17 so that the photodetector of each smaller switch 1 is optically coupled by the individual fibres of its associated ribbon 17 with a laser diode 14a from each one of the smaller switches 10.
  • This interconnection may follow the pattern in which the n fibres of ribbon 15 associated with the first smaller switch are connected by the optical shuffle with the first fibres of each of the ribbons 17; in which the n fibres of the ribbon 15 associated with this second smaller switch are connected by the optical shuffle with the second fibres of each of the ribbons 17, and so on.
  • the combining function is achieved with no insignificant loss: in the case of the tree structure this would be not less than 12dB for a 1 to 16 tree.
  • Such loss provided by a combiner operating in the optical regime can, at least in principle, be avoided by choosing instead to perform the combining operation in the electrical regime.
  • This is not our preferred option in this instance because it means that each detector block 18 would have to have a further (n-1 ) detectors 18b which not only adds to the component costs but complicates adjustment procedures and also feed-through procedures in the case of hermetically packaged detectors.
  • a preferred form of optical combiner 18a with significantly less loss than the equivalent tree or radiative star combiners described above will now be described with reference to Figure 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention porte sur une architecture de commutation dans laquelle un ensemble de n commutateurs de taille réduite (10) est interconnecté par une unité de commande de coeur (12) et un dispositif de brassage optique (16) pour constituer un commutateur de grande taille. Chaque commutateur de taille réduite possède un bloc d'émission (14) pourvu de n diodes laser (14a) connectées par un ruban de n fibres (15) au dispositif de brassage optique et un bloc détecteur (18) également connecté au dispositif de brassage optique. L'unité de commande de coeur ne sélectionne qu'une diode laser dans un commutateur de taille réduite, quel qu'il soit, afin d'émettre à tout moment.
PCT/GB1997/000607 1996-03-13 1997-03-06 Architecture de commutation WO1997034428A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9605298.0 1996-03-13
GB9605298A GB2311180B (en) 1996-03-13 1996-03-13 Switch architecture

Publications (2)

Publication Number Publication Date
WO1997034428A2 true WO1997034428A2 (fr) 1997-09-18
WO1997034428A3 WO1997034428A3 (fr) 1997-11-06

Family

ID=10790329

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/000607 WO1997034428A2 (fr) 1996-03-13 1997-03-06 Architecture de commutation

Country Status (2)

Country Link
GB (1) GB2311180B (fr)
WO (1) WO1997034428A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10277327B2 (en) * 2016-12-28 2019-04-30 Calix Inc. Methods and apparatus for improving reliability of an optical device using auxiliary lasers in a photonic integrated circuit

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150703B (en) * 1983-11-30 1987-03-11 Standard Telephones Cables Ltd Single mode fibre directional coupler
GB8705053D0 (en) * 1987-03-04 1987-04-08 British Telecomm Pipeline sort matrices
US4856863A (en) * 1988-06-22 1989-08-15 Texas Instruments Incorporated Optical fiber interconnection network including spatial light modulator
GB8904281D0 (en) * 1989-02-24 1989-04-12 British Telecomm Optical interconnect networks
US5077483A (en) * 1989-05-08 1991-12-31 At&T Bell Laboratories Network topology for reduced blocking and photonic system implementation thereof
GB9410544D0 (en) * 1994-05-26 1994-07-13 Northern Telecom Ltd Switched optical interconnect
JPH07318737A (ja) * 1994-05-27 1995-12-08 Oki Electric Ind Co Ltd 光回路網
WO1996000920A1 (fr) * 1994-06-30 1996-01-11 The Whitaker Corporation Boitier opto-electronique et emetteur-recepteur optique bidirectionnel s'utilisant a l'interieur de celui-ci
US5475679A (en) * 1994-12-08 1995-12-12 Northern Telecom Limited Large capacity ATM switch

Also Published As

Publication number Publication date
GB2311180A (en) 1997-09-17
GB9605298D0 (en) 1996-05-15
GB2311180B (en) 2000-03-22
WO1997034428A3 (fr) 1997-11-06

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