CA2342111A1 - Strictly non-blocking optical switch core having optimized switching architecture based on reciprocity conditions - Google Patents

Strictly non-blocking optical switch core having optimized switching architecture based on reciprocity conditions Download PDF

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Publication number
CA2342111A1
CA2342111A1 CA002342111A CA2342111A CA2342111A1 CA 2342111 A1 CA2342111 A1 CA 2342111A1 CA 002342111 A CA002342111 A CA 002342111A CA 2342111 A CA2342111 A CA 2342111A CA 2342111 A1 CA2342111 A1 CA 2342111A1
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Canada
Prior art keywords
switches
optical
switch
duplex
way
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Granted
Application number
CA002342111A
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French (fr)
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CA2342111C (en
Inventor
Philip J. Lin
Paul E. Green, Jr.
Ornan A. Gerstel
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Coriant Operations Inc
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Individual
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Publication of CA2342111A1 publication Critical patent/CA2342111A1/en
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Publication of CA2342111C publication Critical patent/CA2342111C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
    • G02B6/3544—2D constellations, i.e. with switching elements and switched beams located in a plane
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
    • G02B6/356—Switching arrangements, i.e. number of input/output ports and interconnection types in an optical cross-connect device, e.g. routing and switching aspects of interconnecting different paths propagating different wavelengths to (re)configure the various input and output links
    • 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
    • H04Q2011/0024—Construction using space switching
    • 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
    • H04Q2011/0056—Clos
    • 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
    • H04Q11/0062—Network aspects
    • H04Q2011/0073—Provisions for forwarding or routing, e.g. lookup tables

Abstract

A switch core (60) is set forth that comprises a plurality of duplex switche s (65) that are interconnected with an interconnection fabric to implement, fo r example, strictly non-blocking operation of the switch core (60) for reciprocal traffic. In one embodiment, an N-way reciprocal switch comprises a plurality of duplex switches (65) numbering N of at least 1x(N-1) switch typ e (the duplex switches have at least N-1 ports available for connection to implement the interconnection fabric). The interconnection fabric interconnects the plurality of duplex switches so that each duplex switch is connected to every other duplex switch used in the interconnection fabric by a single connection. A similar architecture using switches numbering N of at least a 1xN switch type are also set forth. Still further, an (n,m)-way switch, can be used to construct a recursive LM-way switch core and/or recursively expand an existing Clos switch core.

Claims (14)

1. A switch core comprising:
a plurality of optical duplex switches; and interconnection lines interconnecting the plurality of duplex switches to facilitate strictly non-blocking operation of the switch core for reciprocal traffic.
2. A non-square switch core comprising:
a plurality of optical duplex switches; and interconnection lines interconnecting the plurality of optical duplex switches.
3. An N-way reciprocal switch core comprising:
a plurality of optical duplex switches numbering N of at least a 1x(N-1) switch type;
interconnection lines interconnecting the plurality of optical duplex switches so that each optical duplex switch is connected to every other optical duplex switch by at least one interconnection to thereby facilitate strictly non-blocking operation of the switch core for reciprocal tragic.
4. An N-way reciprocal switch core as claimed in claim 3 wherein one or more of the plurality of optical duplex switches numbering N are of at least a 1xN
switch type.
5. An N-way reciprocal switch core as claimed in claim 3 wherein the interconnection lines connect each of the optical duplex switches to one another by exactly one interconnection.
6. An N-way reciprocal switch core as claimed in claim 4 wherein the interconnection lines connect the plurality of optical duplex switches so that each port Y of each switch X is connected to port X of switch Y except when X~Y, wherein X is a number from 1 through N representing a switch position of the optical duplex switch vis-a-vis other optical duplex switches of the switch core and Y is a number from 1 through N representing a position of port vis-a-vis other ports of switch X, such interconnections proceeding from X=1 until a single interconnection is provided between each of the optical duplex switches of the plurality of optical duplex switches.
7. An N-way reciprocal switch core as claimed in claim 6 wherein one or more of the optical duplex switches includes a loop-back port.
8. An N-way reciprocal switch as claimed in claim 4 wherein one or more of the optical duplex switches includes a loop-back port.
9. An (n,m)-way switch core comprising:
a first group of optical duplex switches numbering n, each optical duplex switch of the first group being of a 1x(n+m-1) type having m+m-1 ports;

a second group of optical duplex switches numbering m, each optical duplex switch of the second group being of the 1xn type having n ports;
interconnection lines interconnecting the first and second group of optical duplex switches, ports of the first group of optical duplex switches being connected to respective ports of every other optical duplex switch in the (n,m)-way switch core so that the first group of optical duplex switches is allowed to form duplex connections to any other optical duplex switch in the (n,m)-way switch core, each port of each optical duplex switch of the second group of optical duplex switches being connected only to a respective port of a respective optical duplex switch of the first group of optical duplex switches.
10. An (n,m)-way switch core comprising:

at least one N-way switch;

a first group of optical duplex switches;

a second group of optical duplex switches;

interconnection lines interconnecting the at least one N-way switch and the first and second group of optical duplex switches, ports of the first group of optical duplex switches being connected to respective ports of the at least one N-way switch and the second group of optical duplex switches so that the first group of optical duplex switches is allowed to form duplex connections to every other switch in the (n,m)-way switch core, each port of each optical duplex switch of the second group of optical duplex switches being connected only to a respective port of a respective optical duplex switch of the first group of optical duplex switches.
11. A switch core comprising:

a plurality of (n,m)-way switches each comprising a first group of optical duplex switches;

a second group of optical duplex switches;

interconnection lines interconnecting the first and second group of optical duplex switches, ports of the first group of optical duplex switches being connected to respective ports of every other optical duplex switch in the (n,m)-way switch so that the first group of optical duplex switches is allowed to form duplex connections to every other switch in the (n,m)-way switch, each port of each optical duplex switch of the second group of optical duplex switches being connected only to a respective port of a respective optical duplex switch of the first group of optical duplex switches, and at least one Clos switch connected to and expanded by the plurality of (n,m)-way switches.
12. An LM-way reciprocal switch core comprising:
a plurality of (L,2L-1)-way reciprocal optical switches numbering at least M, each including a plurality of interconnected duplex optical switches;
a plurality of M-way reciprocal optical switches numbering at least 2L-1, each including a plurality of interconnected duplex optical switches;
interconnection lines interconnecting the plurality of (L,2L-1)-way reciprocal optical switches and the plurality of M-way reciprocal optical switches to facilitate strictly non-blocking operation of the LM-way reciprocal switch core for reciprocal traffic.
13. An LM-way reciprocal switch core comprising:
a plurality of (L,2L-1)-way optical reciprocal switches numbering M, each including a plurality of interconnected optical duplex switches;
a plurality of M-way optical reciprocal switches numbering 2L-1, each including a plurality of interconnected duplex optical switches;
interconnection lines interconnecting the plurality of (L,2L-1)-way reciprocal optical switches and the plurality of M-way reciprocal optical switches to facilitate strictly non-blocking operation of the LM-way reciprocal switch core for reciprocal traffic.
14. A reciprocal switch core comprising:
a plurality of cascaded LM-way reciprocal switches, each LM-way reciprocal switch comprising a plurality of (L,2L-1)-way reciprocal optical switches numbering at least M, each including a plurality of interconnected duplex optical switches;
a plurality of M-way reciprocal switches numbering at least 2L-1, each including a plurality of interconnected duplex optical switches; and interconnection lines interconnecting the plurality of (L,2L-1)-way reciprocal optical switches and the plurality of M-way reciprocal optical switches to facilitate strictly non-blocking operation of the LM-way reciprocal switch core for reciprocal traffic.
CA2342111A 1998-09-04 1999-09-07 Strictly non-blocking optical switch core having optimized switching architecture based on reciprocity conditions Expired - Fee Related CA2342111C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/143,335 1998-09-04
US09/143,335 US6366713B1 (en) 1998-09-04 1998-09-04 Strictly non-blocking optical switch core having optimized switching architecture based on reciprocity conditions
PCT/US1999/020414 WO2000014583A1 (en) 1998-09-04 1999-09-07 Strictly non-blocking optical switch core having optimized switching architecture based on reciprocity conditions

Publications (2)

Publication Number Publication Date
CA2342111A1 true CA2342111A1 (en) 2000-03-16
CA2342111C CA2342111C (en) 2011-01-18

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CA2342111A Expired - Fee Related CA2342111C (en) 1998-09-04 1999-09-07 Strictly non-blocking optical switch core having optimized switching architecture based on reciprocity conditions

Country Status (7)

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US (6) US6366713B1 (en)
EP (1) EP1116060B1 (en)
AT (1) ATE258317T1 (en)
AU (1) AU5811699A (en)
CA (1) CA2342111C (en)
DE (1) DE69914344T2 (en)
WO (1) WO2000014583A1 (en)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6366713B1 (en) * 1998-09-04 2002-04-02 Tellabs Operations, Inc. Strictly non-blocking optical switch core having optimized switching architecture based on reciprocity conditions
KR100332410B1 (en) * 1999-09-28 2002-04-13 서평원 Method for searching multiple path of virtual container signals in similar CLOS network
US6850662B1 (en) 2000-07-31 2005-02-01 Tellabs Operations, Inc. Optical switch for reciprocal traffic
US6363182B2 (en) * 2000-07-31 2002-03-26 James D. Mills Optical switch for reciprocal traffic
FR2812988B1 (en) * 2000-08-10 2005-06-24 Cit Alcatel OPTICAL SIGNAL SWITCH
US6760503B1 (en) 2001-04-12 2004-07-06 Eric F. Hermann Scalable optical router/switch and method of constructing thereof
US7161898B1 (en) * 2001-05-15 2007-01-09 Alcatel Common protection architecture for optical network
US7158720B1 (en) 2001-05-15 2007-01-02 Alcatel Optical shared protection ring for multiple spans
US6882766B1 (en) * 2001-06-06 2005-04-19 Calient Networks, Inc. Optical switch fabric with redundancy
EP1271825A1 (en) * 2001-06-25 2003-01-02 Lucent Technologies Inc. Method and system for multiplexed optical information transport
US7158478B1 (en) 2001-07-11 2007-01-02 Alcatel Method and apparatus for signalling in a shared protection ring architecture
DE10213133A1 (en) * 2002-03-23 2003-10-02 Marconi Comm Gmbh Optical switching station
US7212523B2 (en) * 2003-03-27 2007-05-01 Applied Micro Circuits Corporation Pipeline architecture for the design of a single-stage cross-connect system
US7304988B2 (en) 2003-03-28 2007-12-04 Applied Micro Circuits Corporation Technique for building a large single-stage cross-connect using multiple devices without interleaving
US20050050243A1 (en) * 2003-08-29 2005-03-03 Clark Stacey A. Modified core-edge topology for a fibre channel network
US20050141804A1 (en) * 2003-12-24 2005-06-30 Yuanyuan Yang Group switching method and apparatus for dense wavelength division multiplexing optical networks
US7681109B2 (en) * 2005-10-13 2010-03-16 Ramot At Tel Aviv University Ltd. Method of error correction in MBC flash memory
US20070140232A1 (en) * 2005-12-16 2007-06-21 Carson Mark B Self-steering Clos switch
US7804825B2 (en) * 2006-12-20 2010-09-28 Kevin Wilson Matrix expansion lattice
US20080143473A1 (en) * 2006-12-19 2008-06-19 Kevin Wilson Digital Cross-Connect Path Selection Method
KR20090128814A (en) * 2008-06-11 2009-12-16 삼성전자주식회사 Port selector, device test system and method using the same
US9847953B2 (en) 2008-09-11 2017-12-19 Juniper Networks, Inc. Methods and apparatus related to virtualization of data center resources
US8265071B2 (en) 2008-09-11 2012-09-11 Juniper Networks, Inc. Methods and apparatus related to a flexible data center security architecture
US8730954B2 (en) * 2008-09-11 2014-05-20 Juniper Networks, Inc. Methods and apparatus related to any-to-any connectivity within a data center
US8755396B2 (en) 2008-09-11 2014-06-17 Juniper Networks, Inc. Methods and apparatus related to flow control within a data center switch fabric
US11271871B2 (en) 2008-09-11 2022-03-08 Juniper Networks, Inc. Methods and apparatus related to a flexible data center security architecture
US8340088B2 (en) 2008-09-11 2012-12-25 Juniper Networks, Inc. Methods and apparatus related to a low cost data center architecture
US8121478B2 (en) * 2009-03-20 2012-02-21 International Business Machines Corporation Method and apparatus for implementing non-blocking computer interconnection network using bidirectional optical switch
US8694654B1 (en) 2010-03-23 2014-04-08 Juniper Networks, Inc. Host side protocols for use with distributed control plane of a switch
US9813252B2 (en) 2010-03-23 2017-11-07 Juniper Networks, Inc. Multicasting within a distributed control plane of a switch
US9282060B2 (en) 2010-12-15 2016-03-08 Juniper Networks, Inc. Methods and apparatus for dynamic resource management within a distributed control plane of a switch
US9008510B1 (en) 2011-05-12 2015-04-14 Google Inc. Implementation of a large-scale multi-stage non-blocking optical circuit switch
US9207404B2 (en) * 2013-10-04 2015-12-08 Calient Technologies, Inc. Compound optical circuit switch
DE102014211896A1 (en) * 2014-06-20 2015-12-24 Robert Bosch Gmbh Method for monitoring a vehicle control
US9602431B2 (en) * 2015-03-20 2017-03-21 International Business Machines Corporation Switch and select topology for photonic switch fabrics and a method and system for forming same
US11441893B2 (en) * 2018-04-27 2022-09-13 Kla Corporation Multi-spot analysis system with multiple optical probes
RU185530U1 (en) * 2018-07-16 2018-12-07 Федеральное государственное бюджетное образовательное учреждение высшего образования "Астраханский государственный технический университет" ФГБОУ ВО "АГТУ" OPTICAL TWO-STAGE SWITCHING SYSTEM
RU2703351C1 (en) * 2018-12-28 2019-10-16 Федеральное государственное бюджетное учреждение науки Институт проблем управления им. В.А. Трапезникова Российской академии наук Method of organizing a system network in the form of a non-blocking self-routable three-dimensional p-ary multi-ring

Family Cites Families (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335128A (en) * 1961-09-11 1967-08-08 Eastman Kodak Co Preparation of mixed salts of watersoluble cellulose derivatives
US3823401A (en) * 1972-10-04 1974-07-09 Data Transmission Co Synchronous data transmission network
US4038497A (en) * 1975-05-12 1977-07-26 Collins Arthur A Hardwired marker for time folded tst switch with distributed control logic and automatic path finding, set up and release
US4239329A (en) 1978-08-04 1980-12-16 Nippon Telegraph And Telephone Public Corporation Optical nonreciprocal device
US4289373A (en) 1978-08-17 1981-09-15 Nippon Electric Co., Ltd. Bidirectional optical fiber transmission system
US4493113A (en) 1982-09-10 1985-01-08 At&T Bell Laboratories Bidirectional fiber optic transmission systems and photodiodes for use in such systems
US4684796A (en) 1983-07-08 1987-08-04 The Charles Stark Draper Laboratory, Inc. Common optical aperture laser separator for reciprocal path optical
DE3335128A1 (en) * 1983-09-28 1985-04-11 Siemens AG, 1000 Berlin und 8000 München MOBILE RADIO NETWORK
GB8505942D0 (en) * 1985-03-07 1985-04-11 British Telecomm Switching systems
US4787692A (en) 1987-03-13 1988-11-29 American Telephone And Telegraph Company At&T Bell Laboratories Electro optical switch architectures
US4889404A (en) 1987-09-09 1989-12-26 Corning Incorporated Asymmetrical bidirectional telecommunication system
GB2210991B (en) 1987-10-09 1991-09-11 Oki Electric Ind Co Ltd Optical switch matrix
US4787693A (en) * 1987-11-02 1988-11-29 American Telephone And Telegraph Company, At&T Bell Laboratories Passive star coupler
US5144466A (en) 1988-10-04 1992-09-01 Canon Kabushiki Kaisha Optical fiber communication method and multimedia optical fiber network using the same
US5077483A (en) * 1989-05-08 1991-12-31 At&T Bell Laboratories Network topology for reduced blocking and photonic system implementation thereof
US5009477A (en) 1989-05-12 1991-04-23 At&T Bell Laboratories Optical interconnect arrangement
US4932735A (en) * 1989-09-29 1990-06-12 Gte Laboratories Incorporated Integrated optical hybrid matrix switches with very low crosstalk
US5274487A (en) 1989-12-29 1993-12-28 Fujitsu Limited Photonic switching system
US5146358A (en) 1990-01-25 1992-09-08 Pyr Systems, Inc. Optical communications system and method for transmitting information through a single optical waveguide
US5048910A (en) 1990-05-08 1991-09-17 Amp Incorporated Optical matrix switch for multiple input/output port configurations
JPH053458A (en) 1990-10-26 1993-01-08 Nec Corp Bi-direction optical transmitting method and device
LU87975A1 (en) * 1991-03-14 1992-04-15 Siemens Ag TWO-STAGE, AT LEAST DOUBLE ATM REVERSE COUPLING ARRANGEMENT WITH (2NX2N) COUPLERS
FR2682239B1 (en) 1991-10-04 1994-11-04 Cit Alcatel BIDIRECTIONAL TRANSMISSION SYSTEM, IN PARTICULAR BY OPTICAL FIBER, WITH A SINGLE CARRIER FOR BOTH WAYS OF TRANSMISSION.
JP3110104B2 (en) 1991-10-07 2000-11-20 富士通株式会社 switch
US5469277A (en) 1992-02-07 1995-11-21 University Of Ottawa Optical interconnection device
JP2921722B2 (en) 1992-06-10 1999-07-19 三菱マテリアル株式会社 Chip type surge absorber
US5255332A (en) 1992-07-16 1993-10-19 Sdl, Inc. NxN Optical crossbar switch matrix
ATE260532T1 (en) 1992-10-15 2004-03-15 Canon Kk OPTICAL CONCENTRATOR AND OPTICAL TRANSMISSION NETWORK HAVING SUCH A CONCENTRATOR
US5359683A (en) 1993-06-10 1994-10-25 Advanced Optronics, Inc. 1×N electromechanical optical switch
WO1995016216A1 (en) 1993-12-10 1995-06-15 Jds Fitel Inc. Optical non-reciprocal devices
US5471340A (en) 1994-01-07 1995-11-28 Jds Fitel Inc. Reflective optical non-reciprocal devices
US5623562A (en) 1994-04-05 1997-04-22 Tektronix, Inc. Method of aligning opposing optical transmission paths in a mechanical optical switch
DE69501686T2 (en) 1994-06-14 1998-06-25 Nippon Telegraph & Telephone Bidirectional, optical transmission system
DE59510613D1 (en) 1994-10-06 2003-05-08 Infineon Technologies Ag Transmitter and receiver module for bidirectional optical message and signal transmission
US5680234A (en) 1994-10-20 1997-10-21 Lucent Technologies Inc. Passive optical network with bi-directional optical spectral slicing and loop-back
US5652813A (en) 1995-03-31 1997-07-29 The Whitaker Corporation Line bi-directional link
DE19519735A1 (en) 1995-06-02 1996-12-05 Sel Alcatel Ag Optically controlled optical coupling module, method for optically controlling an optical switching network and optical switching network
US5712932A (en) 1995-08-08 1998-01-27 Ciena Corporation Dynamically reconfigurable WDM optical communication systems with optical routing systems
US5729642A (en) 1995-10-02 1998-03-17 The Boeing Company N×N optical switch array using electro-optic and passive waveguide circuits on planar substrates
US5742717A (en) 1995-10-30 1998-04-21 Fuji Electric Co., Ltd. Optical star coupler
US5663813A (en) * 1996-05-29 1997-09-02 Primax Electronics, Ltd. Image scanning device mounted to computer case
US5724165A (en) * 1996-07-23 1998-03-03 Macro-Vision Communications, L.L.C. Fault-tolerant optical routing switch
US5734763A (en) 1996-09-04 1998-03-31 Hewlett-Packard Company Compact two-by-n optical components based on bierfringent walk-off crystals
US6366713B1 (en) * 1998-09-04 2002-04-02 Tellabs Operations, Inc. Strictly non-blocking optical switch core having optimized switching architecture based on reciprocity conditions

Also Published As

Publication number Publication date
CA2342111C (en) 2011-01-18
ATE258317T1 (en) 2004-02-15
US20060018592A1 (en) 2006-01-26
EP1116060B1 (en) 2004-01-21
DE69914344T2 (en) 2004-11-11
US20030138192A1 (en) 2003-07-24
US6785438B2 (en) 2004-08-31
WO2000014583A1 (en) 2000-03-16
US20060269187A1 (en) 2006-11-30
US7292747B2 (en) 2007-11-06
US20050002601A1 (en) 2005-01-06
EP1116060A1 (en) 2001-07-18
DE69914344D1 (en) 2004-02-26
US6366713B1 (en) 2002-04-02
US20020061156A1 (en) 2002-05-23
US6985653B2 (en) 2006-01-10
US6591028B2 (en) 2003-07-08
US7224861B2 (en) 2007-05-29
EP1116060A4 (en) 2002-07-10
AU5811699A (en) 2000-03-27

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