WO2006131020A1 - Procede d'harmonisation pour la restauration de la protection entre reseaux de niveau median dans un reseau optique a commutation automatique - Google Patents

Procede d'harmonisation pour la restauration de la protection entre reseaux de niveau median dans un reseau optique a commutation automatique Download PDF

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Publication number
WO2006131020A1
WO2006131020A1 PCT/CN2005/000794 CN2005000794W WO2006131020A1 WO 2006131020 A1 WO2006131020 A1 WO 2006131020A1 CN 2005000794 W CN2005000794 W CN 2005000794W WO 2006131020 A1 WO2006131020 A1 WO 2006131020A1
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WO
WIPO (PCT)
Prior art keywords
recovery
service
alarm
network
protection
Prior art date
Application number
PCT/CN2005/000794
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English (en)
Chinese (zh)
Inventor
Desheng Sun
Original Assignee
Zte Corporation
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 Zte Corporation filed Critical Zte Corporation
Priority to PCT/CN2005/000794 priority Critical patent/WO2006131020A1/fr
Priority to CN2005800489303A priority patent/CN101138256B/zh
Publication of WO2006131020A1 publication Critical patent/WO2006131020A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Definitions

  • the present invention relates to the field of optical network technologies, and in particular, to a method for coordinating protection recovery between layers in an automatic switched optical network (AS0N). Background technique
  • AS0N Automatic switched optical network
  • CP Control Plane
  • ITU Recommendation ITU- TG. 841 “Classification and Characteristics of SDH Network Protection Structures” provides a detailed description of the self-healing function of the SDH/S0NET optical transport network. Its recommended protection methods include path-based protection and link-based protection. Path-based protection, the most common are channel protection and sub-network connection protection; Link-based protection, most commonly with two or four fiber bidirectional multiplex section shared protection ring, 1+1/1 : ⁇ linear multiplex section links, etc. Channel protection and multiplex section protection are widely used in traditional optical networks.
  • Optical network is a layered network, with client/server relationship between layers; multiplex section ring, multiplex section chain, etc.
  • Protection mechanism, Link-based pre-routing or automatic re-routing recovery can be considered as the protection or recovery mechanism of the service layer network.
  • the Path-based automatic reroute recovery method can be regarded as a recovery mechanism based on the rerouting domain of the client layer network, and is a global recovery mode in the domain.
  • a global recovery mode For convenience of description, hereinafter referred to as a global recovery mode.
  • the service layer network fault will cause the customer layer to be faulty. Therefore, when the service layer network fails, the local protection recovery mode and the global recovery mode are started at the same time, which not only wastes resources, but also causes multiple damages to the service.
  • the multiplex section protection is reserved, the original Link-based recovery mode is revoked, and the Path-based protection and recovery mechanism is uniformly adopted. It does not consider whether the service path is protected by the multiplex section.
  • the automatic recovery process shown in Figure 1 is in the routing information database RDB (Routing Information)
  • B-C-F is assumed to be a multiplex section ring of 3 network elements.
  • the multiplex section protection action is performed to restore the service connection, and the restored service path is A-B-F-C-D.
  • the recovery process that has been initiated will restore the business to A-F-E-D again. It can be seen that this method has a situation in which the service is damaged multiple times.
  • the object of the present invention is to provide a coordination method for protection and recovery between layers in an automatic switched optical network, which overcomes the problem that the protection of the multi-layer protection and recovery mechanism coexists in the prior art cannot be solved well.
  • the technical solution of layer protection and coordinated action is to provide a coordination method for protection and recovery between layers in an automatic switched optical network, which overcomes the problem that the protection of the multi-layer protection and recovery mechanism coexists in the prior art cannot be solved well.
  • the step a) further includes: reserving a channel unrelated to the local protection recovery mode, for carrying a service that does not need to be restored;
  • the step b) is: setting a recovery delay start timer for the service that needs fast and reliable recovery;
  • the step e) is: for the service that needs fast and reliable recovery, the internal network element in the rerouting domain detects the service alarm and starts the recovery delay. Time-based timing; For services that require reliable recovery, the internal NEs in the rerouting domain initiate global recovery.
  • the invention provides a coordination method for protection and recovery between layers in an automatic switched optical network,
  • the local protection recovery mode is used as the primary protection of the service, and the global recovery is used as the backup protection.
  • a complete protection and recovery system is constructed from different layer networks, which has the advantages of fast and reliable.
  • FIG. 2 is a schematic flow chart of an automatic recovery method using a fault location mechanism in the prior art
  • FIG. 6 is a schematic flowchart of a method for coordinating protection and recovery between layers in an automatic switched optical network according to the present invention.
  • FIG. 7 is a schematic flowchart of the present invention for satisfying different service survivability requirements.
  • Step 3 The network element B detects the fault of the B-C link and starts the multiplex section ring protection.
  • the A-B-C-D service alarm is triggered when the B-C link is faulty. After the multiplex section ring protection is complete, the A-B-C-D service alarm disappears.
  • Step 5 Network Element A Detection The A-B-C-D service related recovery delay timer expires.
  • the path after the recovery of the A-B-C-D service is A-B-F-C-D.
  • a C-D section failure is taken as an example to illustrate a specific embodiment of the present invention.
  • the specific implementation includes the following steps:
  • Step 1 Network element B—C—F is configured as a multiplex section ring, and other links of the network adopt local automatic recovery mode.
  • Step 2 In network element A, specify a delay timer for A-BC-D service, delay The time is t;
  • Step 3 The network element C detects that the C-D link is faulty, and initiates local automatic recovery.
  • the A-B-C-D service alarm is triggered at the same time as the C-D link fails. After the local automatic recovery is completed, the A-BCD service alarm disappears.
  • Step 5 Network Element A Detection The A-B-C-D service-related recovery delay timer expires.
  • the local recovery protection mode is activated, and the link resources of the C-F segment need to be utilized. If the same link is shared by the multiplex section protection in the C-F section, the free working channel or NUT channel in the link can be utilized.
  • the NUT channel is described in detail in the ITU-T Recommendation G.841.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé d'harmonisation pour la restauration de la protection entre réseaux de niveau médian dans un réseau optique à commutation automatique. Le procédé passe par le paramétrage du minuteur déclenchant le délai de restauration pour toutes les connexions de service; chaque élément de réseau en temps réel détecte le statut de l'alarme de toutes les liaisons et des connexions de service tout en détectant le statut de minutage du minuteur déclenchant le délai de restauration. S'il détecte un échec de liaison, l'élément de réseau local qui détecte l'alarme de liaison déclenche la restauration de protection correspondante locale, puis continue à détecter le statut de l'alarme et du minutage. S'il détecte une alarme de connexion de service, il réachemine dans le domaine l'alarme de service détectée par l'élément du réseau source, puis déclenche le minuteur du délai de restauration et poursuit la détection du statut de l'alarme et du minutage. S'il détecte que le temps du minuteur déclenchant le délai de restauration est achevé, il réachemine l'élément du réseau source dans le domaine, puis surveille à nouveau le service ininterrompu original, et si l'alarme existe toujours, il déclenche à nouveau la restauration globale et poursuit ensuite la détection du statut de l'alarme et du minutage. L'invention établit un système de restauration de protection complet pour différents niveaux de réseau; les avantages de l'invention sont la rapidité et la crédibilité.
PCT/CN2005/000794 2005-06-06 2005-06-06 Procede d'harmonisation pour la restauration de la protection entre reseaux de niveau median dans un reseau optique a commutation automatique WO2006131020A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2005/000794 WO2006131020A1 (fr) 2005-06-06 2005-06-06 Procede d'harmonisation pour la restauration de la protection entre reseaux de niveau median dans un reseau optique a commutation automatique
CN2005800489303A CN101138256B (zh) 2005-06-06 2005-06-06 一种自动交换光网络中层网络之间保护恢复的协调方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/000794 WO2006131020A1 (fr) 2005-06-06 2005-06-06 Procede d'harmonisation pour la restauration de la protection entre reseaux de niveau median dans un reseau optique a commutation automatique

Publications (1)

Publication Number Publication Date
WO2006131020A1 true WO2006131020A1 (fr) 2006-12-14

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PCT/CN2005/000794 WO2006131020A1 (fr) 2005-06-06 2005-06-06 Procede d'harmonisation pour la restauration de la protection entre reseaux de niveau median dans un reseau optique a commutation automatique

Country Status (2)

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CN (1) CN101138256B (fr)
WO (1) WO2006131020A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009074051A1 (fr) * 2007-11-23 2009-06-18 Huawei Technologies Co., Ltd. Procede, element de reseau et reseau d'acces permettant de reduire l'impact du reseau
CN101197591B (zh) * 2008-01-02 2011-05-25 中兴通讯股份有限公司 用于ason的保护恢复方法和装置
CN103166796A (zh) * 2013-03-13 2013-06-19 烽火通信科技股份有限公司 电力通信网业务恢复时业务信号收发路径一致的实现方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102468885A (zh) * 2010-11-17 2012-05-23 中兴通讯股份有限公司 链路故障处理方法及装置
CN106658186B (zh) * 2016-10-27 2019-08-13 四川长虹电器股份有限公司 实现智能电视网络切换同步ui操作的方法
CN108418649B (zh) * 2018-02-13 2019-10-11 中国联合网络通信集团有限公司 一种计算业务时延的方法和装置
CN110995513B (zh) * 2019-12-27 2023-02-17 远景智能国际私人投资有限公司 物联网***中的数据发送、接收方法、物联网设备及平台

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP1146682A2 (fr) * 2000-03-29 2001-10-17 Nortel Networks Limited Protection d'anneaux locaux hybribes à deux étages avec restauration de chemins rapide à travers des réseaux maillés
US6370110B1 (en) * 1998-09-16 2002-04-09 At&T Corp Back-up restoration technique for SONET/SHD rings
US6718480B1 (en) * 1999-03-25 2004-04-06 Fujitsu Limited Communication path fault restoration system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
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CN1194507C (zh) * 2003-01-09 2005-03-23 上海交通大学 自动光交换网中的双向通道恢复方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6370110B1 (en) * 1998-09-16 2002-04-09 At&T Corp Back-up restoration technique for SONET/SHD rings
US6718480B1 (en) * 1999-03-25 2004-04-06 Fujitsu Limited Communication path fault restoration system
EP1146682A2 (fr) * 2000-03-29 2001-10-17 Nortel Networks Limited Protection d'anneaux locaux hybribes à deux étages avec restauration de chemins rapide à travers des réseaux maillés

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009074051A1 (fr) * 2007-11-23 2009-06-18 Huawei Technologies Co., Ltd. Procede, element de reseau et reseau d'acces permettant de reduire l'impact du reseau
CN101197591B (zh) * 2008-01-02 2011-05-25 中兴通讯股份有限公司 用于ason的保护恢复方法和装置
CN103166796A (zh) * 2013-03-13 2013-06-19 烽火通信科技股份有限公司 电力通信网业务恢复时业务信号收发路径一致的实现方法
CN103166796B (zh) * 2013-03-13 2014-12-10 武汉邮电科学研究院 电力通信网业务恢复时业务信号收发路径一致的实现方法

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CN101138256B (zh) 2010-05-12
CN101138256A (zh) 2008-03-05

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