DE69835193D1 - Ringnetzwerk zur Verteilung von Schutzbetriebsmitteln durch funktionierende Kommunikationswege - Google Patents

Ringnetzwerk zur Verteilung von Schutzbetriebsmitteln durch funktionierende Kommunikationswege

Info

Publication number
DE69835193D1
DE69835193D1 DE69835193T DE69835193T DE69835193D1 DE 69835193 D1 DE69835193 D1 DE 69835193D1 DE 69835193 T DE69835193 T DE 69835193T DE 69835193 T DE69835193 T DE 69835193T DE 69835193 D1 DE69835193 D1 DE 69835193D1
Authority
DE
Germany
Prior art keywords
communication paths
ring network
functioning communication
resources
distributing protective
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.)
Expired - Lifetime
Application number
DE69835193T
Other languages
English (en)
Other versions
DE69835193T2 (de
Inventor
Tatsuya Shiragaki
Naoya Henmi
Makoto Nishio
Hitoshi Takeshita
Hirofumi Shimomura
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.)
NEC Corp
Original Assignee
NEC Corp
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
Priority claimed from JP32735997A external-priority patent/JP3475756B2/ja
Application filed by NEC Corp filed Critical NEC Corp
Publication of DE69835193D1 publication Critical patent/DE69835193D1/de
Application granted granted Critical
Publication of DE69835193T2 publication Critical patent/DE69835193T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0283—WDM ring architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
    • H04J14/0212—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM] using optical switches or wavelength selective switches [WSS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0293—Optical channel protection
    • H04J14/0295—Shared protection at the optical channel (1:1, n:m)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0297—Optical equipment protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H04J14/0206—Express channels arrangements
DE69835193T 1997-11-28 1998-11-30 Ringnetzwerk zur Verteilung von Schutzbetriebsmitteln durch funktionierende Kommunikationswege Expired - Lifetime DE69835193T2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP32735997 1997-11-28
JP32735997A JP3475756B2 (ja) 1997-11-28 1997-11-28 通信ネットワーク、通信ネットワーク・ノード装置、及び、障害回復方式
JP17299798 1998-06-19
JP17299798 1998-06-19

Publications (2)

Publication Number Publication Date
DE69835193D1 true DE69835193D1 (de) 2006-08-24
DE69835193T2 DE69835193T2 (de) 2007-05-31

Family

ID=26495132

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69835193T Expired - Lifetime DE69835193T2 (de) 1997-11-28 1998-11-30 Ringnetzwerk zur Verteilung von Schutzbetriebsmitteln durch funktionierende Kommunikationswege

Country Status (4)

Country Link
US (2) US6657952B1 (de)
EP (1) EP0920153B1 (de)
CA (1) CA2254606C (de)
DE (1) DE69835193T2 (de)

Families Citing this family (127)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6839514B1 (en) * 1999-09-29 2005-01-04 Ciena Corporation Method and apparatus for operation, protection, and restoration of heterogeneous optical communication networks
CA2254606C (en) * 1997-11-28 2003-06-17 Nec Corporation Ring network for sharing protection resource by working communication paths
US6940810B1 (en) * 1998-02-20 2005-09-06 Adc Telecommunications, Inc. Protection switching of virtual connections at the data link layer
DE19828973A1 (de) * 1998-06-29 1999-12-30 Siemens Ag Optisches 2-Faser-Ringnetz
JP3753866B2 (ja) 1998-07-01 2006-03-08 株式会社日立製作所 自己救済型光ネットワーク
DE19906862A1 (de) 1999-02-18 2000-08-24 Siemens Ag Netzknoten mit optischen Add/Drop-Modulen
US6885677B1 (en) 1999-03-12 2005-04-26 Fujitsu Limited Multiprotocol label switching routers
AU4993199A (en) * 1999-03-25 2000-10-16 Chromatis Networks, Inc. Fault protection in networks
WO2000069125A1 (en) * 1999-05-11 2000-11-16 British Telecommunications Public Limited Company Optical communications network
DE19922171B4 (de) * 1999-05-12 2009-08-27 Infineon Technologies Ag Kommunikationssystem mit einem Kommunikationsbus
US6973267B1 (en) * 1999-07-01 2005-12-06 Cisco Technology, Inc. Autoprotected optical communication ring network
WO2001013561A1 (en) * 1999-08-18 2001-02-22 Fujitsu Network Communications, Inc. Optical bi-directional line switched ring for wdm transmission systems
SE9903521L (sv) 1999-09-27 2001-03-28 Queyton Systems Ab Anslutning av en ADD/DROP-NOD
EP1096712A3 (de) * 1999-10-29 2005-09-07 Nippon Telegraph and Telephone Corporation Pfadnetzwerk und Verfahren zur Benutzung des Pfadnetzwerks, das die Konvertierung des Schutzpfades in einen aktiven Pfad verwendet
US6850483B1 (en) * 1999-11-30 2005-02-01 Ciena Corporation Method and system for protecting frame relay traffic over SONET rings
US7099578B1 (en) 1999-12-16 2006-08-29 Tellabs Operations Inc. 1:N protection in an optical terminal
US6616349B1 (en) * 1999-12-20 2003-09-09 Corning Incorporated Two-fiber interconnected ring architecture
JP3721039B2 (ja) * 2000-02-21 2005-11-30 株式会社東芝 伝送システムとそのトラフィック制御方式および伝送装置
JP2001313660A (ja) * 2000-02-21 2001-11-09 Nippon Telegr & Teleph Corp <Ntt> 波長多重光ネットワーク
US6922530B1 (en) * 2000-04-06 2005-07-26 Fujitsu Limited Method and apparatus for optical channel switching in an optical add/drop multiplexer
US7385917B1 (en) * 2000-05-05 2008-06-10 Fujitsu Limited Method and system for providing a protection path for connectionless signals in a telecommunications network
US7499647B2 (en) 2000-05-22 2009-03-03 Opvista Incorporated Fully protected broadcast and select all optical network
US7120359B2 (en) 2000-05-22 2006-10-10 Opvista Incorporated Broadcast and select all optical network
US20020156914A1 (en) * 2000-05-31 2002-10-24 Lo Waichi C. Controller for managing bandwidth in a communications network
EP1161014A1 (de) * 2000-05-31 2001-12-05 PIRELLI CAVI E SISTEMI S.p.A. Selbstschützendes optisches Nachrichtenübertragungs-Ringnetzwerk
US7715715B2 (en) 2000-06-22 2010-05-11 Tellabs Operations, Inc. Shared optical ring protection in a multi-fiber ring
US7079551B2 (en) * 2000-10-05 2006-07-18 Kiribati Wireless Ventures, Llc Private network link verification procedure in free space optical communication network
EP1354439A2 (de) * 2000-10-25 2003-10-22 Nortel Networks Limited Optisches übertragungsnetzwerk und knoten zur herstellung einem derartigen netzwerk
DE10104704A1 (de) * 2001-02-02 2002-09-26 Siemens Ag Verfahren und elektro-optische Schaltungsanordnung zur Leitungsprotektion in einer WDM-Datenübertragungsstrecke
US6956816B1 (en) * 2001-02-15 2005-10-18 Extreme Networks Fault tolerant automatic protection switching for distributed routers
JP2002271354A (ja) 2001-03-06 2002-09-20 Fujitsu Ltd 光路切替装置及び、これを用いる光波長多重ダイバシティ通信システム
JP2002271267A (ja) * 2001-03-07 2002-09-20 Nec Corp ネットワークノード装置及びそれを用いたネットワークシステム並びにその障害位置検出方法
US6950883B1 (en) * 2001-03-12 2005-09-27 At&T Corp. Ring capacity efficient architecture
FR2822312B1 (fr) * 2001-03-14 2005-03-25 France Telecom Dispositif d'accroissement du volume de donnees transitant sur un poste d'abonne et sur une boucle optique d'un reseau de telecommunication a laquelle le poste est connecte
US7130263B1 (en) * 2001-03-31 2006-10-31 Redback Networks Inc. Heterogeneous connections on a bi-directional line switched ring
US20020159392A1 (en) * 2001-04-25 2002-10-31 Adc Telecommunications Israel Ltd. Simplified ATM ring protection for access networks
US7142504B1 (en) * 2001-04-25 2006-11-28 Cisco Technology, Inc. Fault tolerant network traffic management
EP1384341A2 (de) * 2001-05-04 2004-01-28 Appian Communications, Inc. Übertragung von daten zwischen tdm und packet-gestützten netzwerken
US20020167899A1 (en) * 2001-05-11 2002-11-14 Thompson Richard A. System and method for the configuration, repair and protection of virtual ring networks
US7272307B2 (en) * 2001-05-25 2007-09-18 Tellabs Operations, Inc. Virtual protection channel for fiber optic ring network
US6901047B1 (en) * 2001-05-29 2005-05-31 Marconi Intellectual Property (Ringfence), Inc. Internally coupled input path redundancy
ITMI20011139A1 (it) * 2001-05-30 2002-11-30 Cit Alcatel Metodo per gestire la protezione del traffico in reti ad anello oms-spring
US6952395B1 (en) * 2001-06-01 2005-10-04 Calix Networks, Inc. Optical network restoration
US7006497B2 (en) * 2001-06-04 2006-02-28 Calix Networks, Inc. Traffic merging system
US7035294B2 (en) 2001-06-04 2006-04-25 Calix Networks, Inc. Backplane bus
US6952397B2 (en) * 2001-06-07 2005-10-04 Corrigent Systems Ltd. Communication in a bidirectional ring network with single-direction receiving
IL143658A (en) * 2001-06-10 2006-08-01 Eci Telecom Ltd Device, system and method for protecting communication
US7037862B2 (en) 2001-06-13 2006-05-02 Micron Technology, Inc. Dielectric layer forming method and devices formed therewith
US7406029B1 (en) 2001-06-28 2008-07-29 Netapp, Inc. Fault tolerant optical data communication network having auto discovery
US7263060B1 (en) 2001-06-28 2007-08-28 Network Appliance, Inc. Multiple switch protected architecture
US6853811B2 (en) * 2001-09-12 2005-02-08 Pts Corporation Dual-wave optical shared protection ring
US7039005B2 (en) * 2001-10-02 2006-05-02 Fujitsu Limited Protection switching in a communications network employing label switching
US20030147356A1 (en) * 2002-02-07 2003-08-07 Jan Vandenhoudt High speed healing ring for optical transport networks
US7385919B2 (en) * 2002-02-22 2008-06-10 Siemens Aktiengesellschaft Local network, particularly Ethernet network having redundancy properties, and coupling device for such a network
US7231148B2 (en) * 2002-03-28 2007-06-12 Fujitsu Limited Flexible open ring optical network and method
US20040208509A1 (en) * 2002-03-27 2004-10-21 Gerstel Ornan A. Upgradeable photonic networking apparatus and method
US7116905B2 (en) * 2002-03-27 2006-10-03 Fujitsu Limited Method and system for control signaling in an open ring optical network
US20030214962A1 (en) * 2002-05-15 2003-11-20 Mark Allaye-Chan Method and apparatus for bandwidth optimization in network ring topology
FR2841414B1 (fr) * 2002-06-20 2004-12-10 Cit Alcatel Reseau optique en anneau a fibres de lecture et d'ecriture decouplees
US7715713B1 (en) * 2002-09-30 2010-05-11 Meriton Networks Us Inc. Method and apparatus for providing multiple optical channel protection switching mechanisms in optical rings
DE60235094D1 (de) * 2002-11-19 2010-03-04 Alcatel Lucent Die Fehlerlokalisierung in einem Übertragungsnetzwerk
DE10308306B4 (de) * 2003-02-26 2006-04-20 Siemens Ag Verfahren und Anordnung zur Übertragung von Working-Signalen und Protection-Signalen über optische Datennetze
US7545736B2 (en) * 2003-03-31 2009-06-09 Alcatel-Lucent Usa Inc. Restoration path calculation in mesh networks
US7606237B2 (en) * 2003-03-31 2009-10-20 Alcatel-Lucent Usa Inc. Sharing restoration path bandwidth in mesh networks
US8867333B2 (en) * 2003-03-31 2014-10-21 Alcatel Lucent Restoration path calculation considering shared-risk link groups in mesh networks
US7689693B2 (en) * 2003-03-31 2010-03-30 Alcatel-Lucent Usa Inc. Primary/restoration path calculation in mesh networks based on multiple-cost criteria
US7643408B2 (en) * 2003-03-31 2010-01-05 Alcatel-Lucent Usa Inc. Restoration time in networks
US7451340B2 (en) * 2003-03-31 2008-11-11 Lucent Technologies Inc. Connection set-up extension for restoration path establishment in mesh networks
US8296407B2 (en) * 2003-03-31 2012-10-23 Alcatel Lucent Calculation, representation, and maintenance of sharing information in mesh networks
US7646706B2 (en) * 2003-03-31 2010-01-12 Alcatel-Lucent Usa Inc. Restoration time in mesh networks
FR2856861B1 (fr) * 2003-06-30 2007-01-19 Cit Alcatel Reseau optique en anneau a multiplexage de longueurs d'onde et a transmission de signaux protegee par commutation locale d'etat consecutive a une detection locales d'interruption
US7234079B2 (en) * 2003-07-11 2007-06-19 Agency For Science, Technology & Research Method and system for enabling recovery of data stored in a computer network; a method and a system for recovering data stored in a computer network
WO2005008924A1 (ja) * 2003-07-18 2005-01-27 Fujitsu Limited 伝送ルート切替制御方法および光伝送装置
US7483636B2 (en) 2003-07-28 2009-01-27 Fujitsu Limited Optical network with sub-band rejection and bypass
CA2457174A1 (en) * 2003-07-30 2005-01-30 Matsushita Electric Industrial Co., Ltd. Data transmission apparatus and data transmission system
ES2345714T3 (es) * 2003-08-05 2010-09-30 Telecom Italia S.P.A. Metodo para proporcionar rutas de trafico adicional con proteccion de la conexion en una red de comunicacion, y producto de programa informatico y red relacionados con lo mismo.
US7440396B1 (en) * 2003-11-24 2008-10-21 Cisco Technology, Inc. Determining the position of a bad link
US7697455B2 (en) * 2004-02-17 2010-04-13 Dynamic Method Enterprises Limited Multiple redundancy schemes in an optical network
US7627243B2 (en) * 2004-02-17 2009-12-01 Dynamic Method Enterprises Limited Methods and apparatuses for handling multiple failures in an optical network
US8111612B2 (en) 2004-04-02 2012-02-07 Alcatel Lucent Link-based recovery with demand granularity in mesh networks
US7500013B2 (en) 2004-04-02 2009-03-03 Alcatel-Lucent Usa Inc. Calculation of link-detour paths in mesh networks
US8248901B2 (en) * 2004-04-17 2012-08-21 Samsung Electronics Co., Ltd. Information recording medium, apparatus for recording and/or reproducing data on and/or from information recording medium, method of recording and/or reproducing data on and/or from information recording medium, and computer-readable recording medium storing program for executing the method
WO2006002080A2 (en) 2004-06-15 2006-01-05 Opvista Incorporated Optical communication using duobinary modulation
JP4562443B2 (ja) * 2004-07-15 2010-10-13 富士通株式会社 光伝送システム及び光伝送方法
US7450851B2 (en) 2004-08-27 2008-11-11 Fujitsu Limited System and method for modularly scalable architecture for optical networks
US20060087964A1 (en) * 2004-10-21 2006-04-27 International Business Machines Corporation Method and apparatus for switching among different network paths while suppressing ghost packets
JP4593267B2 (ja) * 2004-12-28 2010-12-08 富士通株式会社 光ノードおよび光分岐挿入装置
CN100352223C (zh) 2004-12-31 2007-11-28 华为技术有限公司 一种在城域传输网络中保护数据业务的方法
WO2007044939A2 (en) 2005-10-13 2007-04-19 Opvista Incorporated Optical ring networks using circulating optical probe in protection switching with automatic reversion
US7852754B2 (en) * 2006-03-17 2010-12-14 Tellabs San Jose, Inc. Method and apparatus for managing faults in a ring network
US9083551B2 (en) * 2006-03-17 2015-07-14 Tellabs Operations, Inc. Method and apparatus for media distribution using VPLS in a ring topology
CN101043267B (zh) * 2006-03-24 2010-05-12 上海交通大学 弹性光突发环的保护与恢复方法及其装置
US8849109B2 (en) * 2006-03-30 2014-09-30 Alcatel Lucent Fault isolation and provisioning for optical switches
US8085676B2 (en) * 2006-06-29 2011-12-27 Nortel Networks Limited Method and system for looping back traffic in QIQ ethernet rings and 1:1 protected PBT trunks
US20100238813A1 (en) 2006-06-29 2010-09-23 Nortel Networks Limited Q-in-Q Ethernet rings
JP4778056B2 (ja) * 2006-06-30 2011-09-21 三菱電機株式会社 通信ノードおよび通信システムのリング確立確認方法
EP1901483B1 (de) * 2006-09-13 2014-11-05 Yamaha Corporation Netzwerksystem und Audiosignalprozessor
CN100578993C (zh) * 2006-09-14 2010-01-06 上海交通大学 一种双链路故障的共享路径保护方法及装置
US7929448B2 (en) * 2006-10-17 2011-04-19 Verizon Patent And Licensing Inc. Monitoring link aggregation links
CN101222350B (zh) * 2007-01-12 2011-08-24 华为技术有限公司 保护倒换决策方法和保护倒换决策系统
US8014668B2 (en) * 2007-01-21 2011-09-06 Alcatel Lucent Method and system for distributed measurement and compensation of chromatic dispersion in an optical network
US7765385B2 (en) * 2007-04-18 2010-07-27 International Business Machines Corporation Fault recovery on a parallel computer system with a torus network
US7773883B1 (en) 2007-05-04 2010-08-10 Vello Systems, Inc. Single-fiber optical ring networks based on optical double sideband modulation
CN101330369B (zh) * 2007-06-21 2014-07-09 华为技术有限公司 发送、接收方法及装置、通道保护方法及系统
US8913481B2 (en) * 2007-06-30 2014-12-16 Alcatel Lucent Method and system for efficient provisioning of multiple services for multiple failure restoration in multi-layer mesh networks
US8175458B2 (en) 2007-07-17 2012-05-08 Vello Systems, Inc. Optical ring networks having node-to-node optical communication channels for carrying data traffic
US8027263B2 (en) * 2008-09-30 2011-09-27 International Business Machines Corporation Method to manage path failure threshold consensus
US7983171B2 (en) * 2008-09-30 2011-07-19 International Business Machines Corporation Method to manage path failure thresholds
JP5267160B2 (ja) * 2009-01-28 2013-08-21 富士通株式会社 ノード装置、リングネットワーク及び予備パスの帯域制御方法
CN102549979A (zh) * 2009-07-10 2012-07-04 诺基亚西门子通信公司 用于传送业务的方法和设备
US9054832B2 (en) 2009-12-08 2015-06-09 Treq Labs, Inc. Management, monitoring and performance optimization of optical networks
US8705741B2 (en) 2010-02-22 2014-04-22 Vello Systems, Inc. Subchannel security at the optical layer
US8509056B1 (en) * 2010-05-13 2013-08-13 The Directv Group, Inc. Multi-ring IP multicast network and method using autonomous instances of interior gateway protocol (IGP)
JP5537410B2 (ja) * 2010-12-28 2014-07-02 株式会社東芝 二重リング・ネットワークシステム及び二重リング・ネットワークの送信順位決定方法並びに伝送局装置
US8542999B2 (en) 2011-02-01 2013-09-24 Vello Systems, Inc. Minimizing bandwidth narrowing penalties in a wavelength selective switch optical network
CN102118319B (zh) * 2011-04-06 2013-09-18 杭州华三通信技术有限公司 流量负载均衡方法和装置
US8649683B2 (en) * 2011-06-15 2014-02-11 Verizon Patent And Licensing Inc. Light path characterization, traffic protection, and wavelength defragmentation
FR2978315B1 (fr) * 2011-07-20 2013-09-13 Thales Sa Reseau de transmission d'informations et noeud de reseau correspondant
JP5867247B2 (ja) * 2012-03-30 2016-02-24 富士通株式会社 光伝送装置
KR101631651B1 (ko) * 2013-12-04 2016-06-20 주식회사 쏠리드 링 토폴로지 방식의 광중계기
US9699074B2 (en) * 2014-04-10 2017-07-04 Fujitsu Limited Efficient utilization of transceivers for shared restoration in flexible grid optical networks
JP6263105B2 (ja) * 2014-08-22 2018-01-17 ＡＰＲＥＳＩＡ Ｓｙｓｔｅｍｓ株式会社 中継システムおよび中継装置
US9692503B2 (en) * 2014-11-04 2017-06-27 Verizon Patent And Licensing Inc. Network protection through excess directions of reconfigurable optical add/drop multiplexor (ROADM)
US10374746B1 (en) * 2016-10-10 2019-08-06 Frontier Communications Corporation Single mode fiber distribution design to maximize capacity and resilience in GPON deployments and use thereof
US10771153B2 (en) * 2017-06-27 2020-09-08 Afl Telecommunications Llc Optical power measurement apparatus
US20180375574A1 (en) * 2017-06-27 2018-12-27 Afl Telecommunications Llc Optical power measurement apparatus
CN113497665A (zh) * 2020-03-20 2021-10-12 华为技术有限公司 一种光开关和基于光开关的光性能检测方法

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5159595A (en) 1988-04-08 1992-10-27 Northern Telecom Limited Ring transmission system
US5179548A (en) * 1991-06-27 1993-01-12 Bell Communications Research, Inc. Self-healing bidirectional logical-ring network using crossconnects
US5341364A (en) 1992-06-02 1994-08-23 At&T Bell Laboratories Distributed switching in bidirectional multiplex section-switched ringtransmission systems
US5442623A (en) 1992-08-17 1995-08-15 Bell Communications Research, Inc. Passive protected self healing ring network
US5406401A (en) 1992-10-02 1995-04-11 At&T Corp. Apparatus and method for selective tributary switching in a bidirectional ring transmission system
JP3301565B2 (ja) 1993-08-23 2002-07-15 日本電信電話株式会社 リング伝送装置
JPH07226736A (ja) * 1994-02-14 1995-08-22 Hitachi Ltd メッシュ網における障害復旧方法
GB9403223D0 (en) 1994-02-19 1994-04-13 Plessey Telecomm Telecommunications network including remote channel switching protection apparatus
IT1267645B1 (it) * 1994-12-09 1997-02-07 Cselt Centro Studi Lab Telecom Struttura di comunicazione ad anello su vettore ottico e relativo nodo riconfigurabile.
FR2734437B1 (fr) * 1995-05-17 1997-06-13 Sutter Alain Reseau en anneau de transmission d'informations multiplexees en longueur d'onde
SE506748C2 (sv) 1995-06-26 1998-02-09 Ericsson Telefon Ab L M Förfarande och anordning för att borttaga och addera kanaler i en optisk multiplexor
IT1277204B1 (it) * 1995-10-19 1997-11-05 Pirelli S P A Ora Pirelli Cavi Rete di comunicazione ottica trasparente ad anello autoprotetto
US5793746A (en) * 1996-04-29 1998-08-11 International Business Machines Corporation Fault-tolerant multichannel multiplexer ring configuration
US6256292B1 (en) * 1996-07-11 2001-07-03 Nortel Networks Corporation Self-healing line switched ring for ATM traffic
US5986783A (en) * 1997-02-10 1999-11-16 Optical Networks, Inc. Method and apparatus for operation, protection, and restoration of heterogeneous optical communication networks
CA2286593A1 (en) 1997-04-15 1998-10-22 Donald G. Dempsey Method and apparatus for an optical bi-directional line switched ring data communications system
US6069719A (en) * 1997-07-30 2000-05-30 Ciena Corporation Dynamically reconfigurable optical add-drop multiplexers for WDM optical communication systems
US6631018B1 (en) * 1997-08-27 2003-10-07 Nortel Networks Limited WDM optical network with passive pass-through at each node
US6396852B1 (en) * 1997-11-18 2002-05-28 Jane Marie Simmons Ring bundling in the design of rings for telecommunications networks
CA2254606C (en) * 1997-11-28 2003-06-17 Nec Corporation Ring network for sharing protection resource by working communication paths

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US20040057375A1 (en) 2004-03-25
EP0920153B1 (de) 2006-07-12
DE69835193T2 (de) 2007-05-31
EP0920153A3 (de) 2003-01-02
US6657952B1 (en) 2003-12-02
EP0920153A2 (de) 1999-06-02
CA2254606A1 (en) 1999-05-28
CA2254606C (en) 2003-06-17
US7280470B2 (en) 2007-10-09

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