WO2011095101A1 - Procédé, dispositif et système de protection 1 : n linéaire pour réseau de transport par paquets - Google Patents

Procédé, dispositif et système de protection 1 : n linéaire pour réseau de transport par paquets Download PDF

Info

Publication number
WO2011095101A1
WO2011095101A1 PCT/CN2011/070666 CN2011070666W WO2011095101A1 WO 2011095101 A1 WO2011095101 A1 WO 2011095101A1 CN 2011070666 W CN2011070666 W CN 2011070666W WO 2011095101 A1 WO2011095101 A1 WO 2011095101A1
Authority
WO
WIPO (PCT)
Prior art keywords
protection switching
working path
protection
path
node
Prior art date
Application number
PCT/CN2011/070666
Other languages
English (en)
Chinese (zh)
Inventor
张飞
代雪会
吴波
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2011095101A1 publication Critical patent/WO2011095101A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0604—Management of faults, events, alarms or notifications using filtering, e.g. reduction of information by using priority, element types, position or time
    • H04L41/0609—Management of faults, events, alarms or notifications using filtering, e.g. reduction of information by using priority, element types, position or time based on severity or priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/22—Alternate routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery

Definitions

  • Linear 1 N protection method, device and system for packet transmission network
  • the present invention relates to communication technologies, and in particular to a linear 1 : N protection method, apparatus and system for a packet transmission network. Background technique
  • PTN packet transport network
  • the PTNs defined now include, but are not limited to, the following networks: MPLS, T-MPLS, MPLS-TP, Ethernet, etc., and their network protection is of great significance.
  • RFC5654 proposes that MPLS-TP must support pseudowire (PW) and label switching path (LSP) point-to-point (P2P) bidirectional 1: N linear protection switching, which must support point-to-multipoint ( Point to multi point, P2MP ) One-way 1:N protection switching.
  • PW pseudowire
  • LSP label switching path
  • P2P point-to-point
  • N linear protection switching
  • the one-way protection refers to switching only the services in the affected direction; the two-way is that the services in both directions are switched; 1: N protection means that one protection path protects N working paths, and the protection path has at least the bandwidth. The bandwidth of one path with the largest bandwidth among the N working paths is used for the protection of the tributary signal and the device board level.
  • the network resources can be effectively utilized because the probability of N working paths or device boards failing at the same time is low, but the cost is that the protection switching time is slower than the 1:1 protection scheme.
  • the first and last nodes of the working path and the protection path are configured with a Protection State Coordination (PSC) protocol.
  • PSC Protection State Coordination
  • the main object of the present invention is to provide a linear 1 : N protection method and apparatus for a packet transmission network to implement linear 1 : N protection of a packet transmission network, thereby saving bandwidth.
  • Another object of the present invention is to provide a linear 1 : N protection system for a packet transport network to achieve linear 1 : N protection of a packet transport network, saving bandwidth.
  • a linear 1 : N protection method for a packet transport network comprising:
  • the destination node After detecting that the working path is faulty, the destination node notifies the remote node to perform 1:N protection switching for the working path;
  • the remote node determines, according to the detected working path condition and the notification from the destination node, the working path to perform the 1:N protection switching, and performs the protection switching according to the notification and notifies the destination node to perform the working path of the protection switching;
  • the destination node performs a 1:N protection switching on the working path on which the remote node has performed protection switching according to the notification from the remote node.
  • the method further includes:
  • the request flag bit indicating the 1:N protection switching and the content of the protection switching command indicating the specific working path are pre-expanded.
  • the process of determining the working path for performing the 1:N protection switching includes:
  • the remote node itself does not detect the working path failure, and bridges the traffic of the receiving end and the transmitting end of the working path notified by the destination node to the protection path on its own side;
  • the remote node itself detects the working path failure and compares the failure detected by itself.
  • the working path and the working path notified by the destination node are prioritized, and then the receiving end and the transmitting end of the working path with the highest priority are bridged to the protection path on the own side.
  • the pre-expanded content of the protection switching command is included in the two-phase protection state coordination 2-phase PSC protocol format.
  • N protection switching is: protection switching request Reverse request flag bit
  • the content indicating the specific working path is: Work path number.
  • the communication unit is configured to receive a packet from the destination node that performs the 1:N protection switching unit, and send the packet to the 1:N protection switching unit; and notify the destination node according to the triggering of the 1:N protection switching unit. Specific protection switching situation;
  • the 1:N protection switching unit is configured to bridge the receiving end and the sending end of the working path corresponding to the received notification to the protection path on the side to which the node belongs, and notify the communication unit of the situation. .
  • a fault detecting unit configured to detect a working path state of a node to which the node belongs, and notify the 1:N protection switching unit when a working path fault is detected;
  • the 1:N protection switching unit is further configured to compare the priority of the working path corresponding to the notification of the fault detecting unit with the working path corresponding to the packet from the destination node, and the highest priority is performed on the node side to which the node belongs. Both the receiving end and the sending end of the working path are bridged to the protection path.
  • the communication unit is provided with a pre-expanded request flag bit for indicating 1:N protection switching, and a protection switching command content indicating a specific working path, the content being included in the 2-phase PSC protocol format;
  • the request flag used to indicate 1:N protection switching is: Reverse request flag;
  • the content indicating the specific working path is: Work path number.
  • a linear 1:N protection device of a packet transmission network in a packet transmission network, the device as a destination node, comprising a fault detection unit, a 1:N protection switching unit, and a communication unit; wherein the fault detection unit is configured to Detecting a working path state on a side of the node to which it belongs, and notifying the communication unit when a working path failure is detected;
  • the communication unit is configured to send a working path fault condition from the fault detecting unit to the remote node; and receive a message from the remote node indicating that the 1:N protection switching is performed, and send the message to the 1 : an N protection switching unit; and notifying the remote node of the completion protection switching from the 1:N protection switching unit;
  • the 1:N protection switching unit is configured to bridge the receiving end and the sending end of the working path corresponding to the received packet with the 1:N protection switching on the node to which the node belongs to the protection path, The communication unit is notified of the completion of the protection switching.
  • the communication unit is provided with a pre-expanded request flag bit for indicating 1:N protection switching, and a protection switching command content indicating a specific working path, the content being included in the 2-phase PSC protocol format;
  • N protection switching is: Reverse request flag; indicates that the content of the specific working path is: Work path number.
  • a linear 1: N protection system for a packet transmission network comprising a remote node and a destination node in a packet transmission network;
  • the remote node is configured to perform a 1:N protection switching notification according to the detected working path condition and the indication from the destination node, determine a working path to perform 1:N protection switching, and perform protection switching, and notify the purpose.
  • the node performs the working path of the protection switching;
  • the destination node is configured to notify the remote node to perform 1:N protection switching on the working path after detecting that the working path is faulty; and perform protection switching on the remote node according to the notification from the remote node.
  • the working path is 1:N protection switching.
  • the system is provided with a pre-expanded request flag bit for indicating 1:N protection switching, and a protection switching command content indicating a specific working path, the content is included in the 2-phase PSC protocol format;
  • N protection switching is: protection switching request Reverse request flag
  • the content indicating the specific working path is: Work path number.
  • the linear 1:N protection method, device and system of the packet transmission network of the present invention can expand the content of the protection switching command, add 1: N protection switching request flag bit, and work path number; the destination node detects that the working path is faulty. After that, the remote node is notified to perform 1:N protection switching on the working path; the remote node determines the working path to perform 1:N protection switching and performs protection switching according to the working path condition detected by the remote node and the notification from the destination node. And notifying the destination node that the working path of the protection switching is performed; the destination node performs 1:N protection switching on the working path that the remote node has performed protection switching according to the notification from the remote node. Therefore, the linear 1 : N protection of the packet transmission network can be smoothly implemented.
  • FIG. 1 is a schematic diagram of a format of a 1-phase PSC protocol in the prior art
  • FIG. 2 is a schematic diagram of a 2-phase PSC protocol format of the present invention
  • FIG. 3 is a schematic diagram of a 1:N protection switching according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of a 1:N protection switching according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of a 1:N protection switching process of the present invention.
  • FIG. 6 is a diagram of a 1:N protection switching device of the present invention. detailed description
  • FIG. 1 is a schematic diagram of a format of a 1-phase Protection State Coordination (PSC) protocol in the prior art.
  • PSC Protection State Coordination
  • Ver is the version of the 1-phase PSC protocol, usually set to 0;
  • the Request (Request) flag is used to indicate the command request for protection switching.
  • the currently defined command is 3 ⁇ 4:
  • Fpath A value of 0 indicates that the protection path is faulty. A value of 1 indicates that the working path is faulty and the remaining flags are reserved.
  • a value of 0 indicates that the traffic is currently being transmitted on the working path.
  • a value of 1 indicates that the traffic is currently being transmitted on the protection path, and the remaining flags are reserved.
  • Reserved is reserved flag, which is to be expanded.
  • you can extend the content of the protection switching command such as: Add 1: N protection switching request flag and working path number, so that the extended protection switching command can provide technical support for 1: N protection switching.
  • the content of the protection switching command content can be extended by extending the protocol formats such as Automatic Protection Protocol (APS) and PSC.
  • FIG. 2 shows an extension manner by using PSC as an example.
  • FIG. 2 is a schematic diagram of a 1-phase PSC protocol format according to the present invention.
  • FIG. 2 defines a 2-phase PSC protocol for 1:N protection switching based on the content shown in FIG. Specific expansion:
  • a new Request flag is defined at the Request flag:
  • PN path number
  • the value 0 is used to identify the protection path
  • the value 1 to 14 is used to identify the working path.
  • the value 15 indicates that there is extra service in the current protection channel.
  • the size of the path number indicates the priority of the protection switching for the path. In the same case, the smaller the path number, the higher the priority. That is: if the work path 1 and the work path 2 have a signal failure failure at the same time, then the priority protection work Path 1.
  • the first and last nodes of the path can complete the 1:N protection switching operation only through two signaling interactions (not counting the No request request) process, so that multiple processes can be processed efficiently
  • the working path fails at the same time, the 1:N protection and recovery of the packet service is realized.
  • the basic idea of performing 1 : N protection switching is as follows:
  • this fault may be a signal failure or a signal degradation
  • the destination node After detecting that the working path is faulty (this fault may be a signal failure or a signal degradation), the destination node sends a PSC packet for protection switching to the remote node; the fault may be carried, the failed working path, and Information about the traffic on the currently active path, the number of the failed working path, and so on.
  • the remote node receives the protection switching command from the destination node, and determines the working path for the 1:N protection switching in combination with the working path detected by itself. For example, if the remote node only receives the protection switching command from the destination node, the remote node determines to perform 1:N protection switching on the working path corresponding to the protection switching command; When the protection switching command of the destination node detects that the working path of the one side is faulty, the remote node can compare the working path corresponding to the received protection switching command with the priority of the working path that is faulty on one side, and Make sure to perform a 1:N protection switching on the highest priority working path.
  • the remote node After that, the remote node performs a protection switching operation on the working path that is determined to perform 1:N protection switching, and then sends a Reverse Request command to the destination node, where the failed working path and the traffic situation on the currently activated path are already Complete the information such as the number of the working path for protection switching.
  • the destination node receives the Reverse Request command from the remote node, and performs a protection switching action on the working path corresponding to the command on its own side. Then, the No Request message is sent to the remote node, where the failed working path and the currently activated Information about the traffic on the path, the number of the work path that has completed the protection switchover, and so on. Based on the above basic idea, when the 1:N protection switching is performed, the specific operation process can be shown in Figures 3 and 4.
  • FIG. 3 is a schematic diagram of 1: N protection switching according to Embodiment 1 of the present invention.
  • a 1:N protection group is configured between Node A (NE A ) and Node B (NE B ) to protect N working paths with a protection path.
  • NE A and NE B are the first and last nodes common to these N+1 paths, and can be directly connected or spanned in multiple nodes.
  • N+1 paths belong to different shared risk link groups ( SRLG ), such as in different optical fibers, so that when an optical fiber cut occurs, only one path is affected, instead of Will cause N+1 paths to be unusable.
  • SRLG shared risk link groups
  • the protection path number is 0, and the work path number is from 1 to N.
  • the NE A After receiving the PSC packet from the NE B, the NE A bridges the traffic of the receiving end and the transmitting end of the working path 1 to the protection path on its own side, and then sends a command to restore the requesting RR (Reverse Request) PSC packet.
  • the working path is working path 1.
  • NE B After receiving the Reverse Request from NE A, NE B bridges the traffic of the receiving end and the transmitting end of working path 1 to the protection path on its own side, and then sends a null request.
  • the PSC message of NR (No request) is sent to NE A.
  • FIG. 4 is a schematic diagram of 1:N protection switching according to Embodiment 2 of the present invention.
  • a 1:N protection group is configured between NE A and NE B to protect a N working path by applying a protection path.
  • NE A and NE B are the first and last nodes common to the N+1 paths, and may be directly connected or may span multiple nodes in the middle. In general, N+1 paths belong to different SRLGs.
  • the number of the protection path is 0, and the number of the working path is from 1 to N; and, at time tl, the path of the working path 2 from NE B to NE A is invalid.
  • NE A detects the signal failure through CV OAM, and then sends a PSC message with the command SF.
  • FIG. 5 is a schematic diagram of a 1:N protection switching process according to the present invention, where the process includes the following steps:
  • Step 510 Expand the content of the protection switching command, and add the 1: Reverse request and the working path number required for the N protection switching request.
  • Step 520 After detecting that the working path is faulty, the destination node notifies the remote node to perform a 1:N protection switching for the working path.
  • Step 530 The remote node determines, according to the detected working path condition and the notification from the destination node, the working path to perform the 1:N protection switching and performs protection switching, and notifies the destination node to perform the working path of the protection switching. .
  • Step 540 The destination node performs a 1:N protection switching on the working path that the remote node has performed protection switching according to the notification from the remote node.
  • FIG. 6 is a diagram of a 1:N protection switching device according to the present invention; as a NE, the device includes a connected fault detecting unit, a 1:N protection switching unit, and a communication unit; the functional entities may be connected in series or in two pairs. As long as it can interact normally to smoothly implement 1: N protection switching. Further, the communication unit is provided with a protection switching command format in which content expansion has been realized, so that operations such as encapsulation, analysis, and transmission of communication contents can be performed in a normal communication process.
  • the communication unit may receive a PSC message of a protection switching command (such as a signal fault) from the destination node, and send the received PSC message to the 1:N.
  • the protection switching unit, the 1:N protection switching unit bridges the receiving end and the transmitting end of the working path corresponding to the PSC packet received on the node to which the node belongs to the protection path, and notifies the situation to the protection path.
  • Communication unit The communication unit sends a PSC message with the reverse request to the destination node according to the notification of the 1:N protection switching unit to notify the destination node of the specific protection switching situation.
  • the fault detecting unit can detect the working path shape on the side of the node to which it belongs. State, and notify the 1: N protection switching unit when a working path failure is detected. If the working path corresponding to the notification of the fault detecting unit is different from the working path corresponding to the PSC file from the destination node, the 1:N protection switching unit needs to compare the priorities of the two working paths. And the receiving end and the sending end traffic of the highest priority working path are bridged to the protection path on the node side to which the node belongs, and the foregoing method is used to notify the destination node through the communication unit.
  • the fault detecting unit can detect the working path state of the node to which it belongs, and notify the communication unit of the state in which the working path is detected, and the communication unit takes the situation in the form of a PSC message. Send to the remote node.
  • the communication unit can also receive the PSC message from the remote node and the command is a Reverse Request, and send the PSC message to the 1:N protection switching unit, and the 1:N protection switching unit will be on the side of the node to which it belongs.
  • the receiving end and the sending end of the working path corresponding to the PSC packet are bridged to the protection path, and then the communication unit is notified of the completion of the protection switching, and the communication unit sends a PSC with the command No request to the remote node.
  • the message is sent to notify the remote node that the protection switching has been completed.
  • the linear 1 : N protection technology of the packet transmission network of the present invention can smoothly implement the linear 1 : N protection of the packet transmission network, whether it is a method or a device embodied by a node or a system including a node.

Landscapes

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

Abstract

L'invention porte sur un procédé, un dispositif et un système de protection 1 : N linéaire pour réseau de transport par paquets. Dans le réseau de transport par paquets, une fois qu'un nœud de destination a détecté qu'une défaillance s'est produite dans un chemin de travail, il peut notifier à un nœud distant de mettre en œuvre une commutation de protection 1 : N pour le chemin de travail ; le nœud distant détermine le chemin de travail pour lequel la commutation de protection 1 : N sera mise en œuvre conformément à la situation de chemin de travail détectée par le nœud distant et à la notification provenant du nœud de destination, et met ainsi en œuvre la commutation de protection et signale au nœud de destination le chemin de travail pour lequel ladite commutation de protection a été mise en œuvre ; conformément à la notification provenant du nœud distant, le nœud de destination met en œuvre la commutation de protection 1 : N pour ledit chemin de travail pour lequel le nœud distant a mis en œuvre la commutation de protection. Le procédé, le dispositif et le système peuvent réaliser la protection 1 : N linéaire pour le réseau de transport par paquets et économiser la bande passante.
PCT/CN2011/070666 2010-02-04 2011-01-26 Procédé, dispositif et système de protection 1 : n linéaire pour réseau de transport par paquets WO2011095101A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010112797.6A CN102148694B (zh) 2010-02-04 2010-02-04 一种分组传送网络的线性1:n保护方法、装置和系统
CN201010112797.6 2010-02-04

Publications (1)

Publication Number Publication Date
WO2011095101A1 true WO2011095101A1 (fr) 2011-08-11

Family

ID=44354966

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/070666 WO2011095101A1 (fr) 2010-02-04 2011-01-26 Procédé, dispositif et système de protection 1 : n linéaire pour réseau de transport par paquets

Country Status (2)

Country Link
CN (1) CN102148694B (fr)
WO (1) WO2011095101A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014107834A1 (fr) * 2013-01-08 2014-07-17 Telefonaktiebolaget L M Ericsson (Publ) Procédé et dispositif permettant de gérer l'incohérence des états psc entre deux extrémités

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102420753B (zh) * 2011-11-28 2014-08-13 中兴通讯股份有限公司 自动保护倒换aps协议状态迁移方法及其装置
CN103297259B (zh) * 2012-02-29 2018-07-06 中兴通讯股份有限公司 点到多点组播业务的保护方法及装置
CN102694683B (zh) * 2012-05-22 2016-09-28 华为技术有限公司 一种业务倒换方法、网管服务器及通信系统
CN103580884B (zh) * 2012-07-19 2018-08-28 中兴通讯股份有限公司 保护配置的方法、系统、发送端设备及接收端设备
CN105703936B (zh) * 2014-11-28 2020-06-09 中兴通讯股份有限公司 一种控制方法、装置及主控板
CN105763344A (zh) * 2014-12-15 2016-07-13 中兴通讯股份有限公司 一种动态调整srlg的方法和装置
CN105897451B (zh) * 2015-01-26 2019-12-06 中国移动通信集团内蒙古有限公司 Otn调度系统及故障处理方法
CN106921568B (zh) * 2015-12-26 2020-04-21 华为技术有限公司 一种网络保护方法和装置
CN108243099B (zh) * 2016-12-24 2021-03-23 华为技术有限公司 一种路径选择的方法、装置和系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5978354A (en) * 1995-07-21 1999-11-02 Fujitsu Limited Optical transmission system and transmission line switching control method
CN1479488A (zh) * 2002-08-05 2004-03-03 M：n通道保护
CN101567800A (zh) * 2008-04-22 2009-10-28 华为技术有限公司 保护倒换决策方法、系统和性能监测方法、系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5978354A (en) * 1995-07-21 1999-11-02 Fujitsu Limited Optical transmission system and transmission line switching control method
CN1479488A (zh) * 2002-08-05 2004-03-03 M：n通道保护
CN101567800A (zh) * 2008-04-22 2009-10-28 华为技术有限公司 保护倒换决策方法、系统和性能监测方法、系统

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"G.808.1 Generic protection switching-Linear trail and subnetwork protection", ITU-T, 31 March 2006 (2006-03-31) *
"G.841 Types and characteristics of SDH network protection architectures", ITU-T, 31 October 1998 (1998-10-31) *
"G.873.1 Optical Transport Network (OTN): Linear protection", ITU-T, 31 March 2006 (2006-03-31) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014107834A1 (fr) * 2013-01-08 2014-07-17 Telefonaktiebolaget L M Ericsson (Publ) Procédé et dispositif permettant de gérer l'incohérence des états psc entre deux extrémités
US9674085B2 (en) 2013-01-08 2017-06-06 Telefonaktiebolaget Lm Ericsson (Publ) Method and device for handling inconsistency of PSC states between two ends

Also Published As

Publication number Publication date
CN102148694A (zh) 2011-08-10
CN102148694B (zh) 2016-03-30

Similar Documents

Publication Publication Date Title
WO2011095101A1 (fr) Procédé, dispositif et système de protection 1 : n linéaire pour réseau de transport par paquets
EP2086175B1 (fr) Procédé et appareil pour protéger un anneau éthernet
US9270485B2 (en) Method for ethernet ring protection
US9871708B2 (en) Method and system for ring protection switching
EP2458797A1 (fr) Procédé, dispositif et système de mise à jour d'informations de topologie de réseau en anneau
US7660236B2 (en) System and method of multi-nodal APS control protocol signaling
CN100512128C (zh) 保护组播转发路径的方法和系统和业务路由器
WO2008046358A1 (fr) Procédé et dispositif destinés à réaliser une pénétration d'un statut de liaison de réseau point à multipoint
WO2006108353A1 (fr) Procede de mise en oeuvre de commutation de protection bidirectionnelle pour commutation d'etiquette de protocole multiple
WO2008055436A1 (fr) Procédé de commande d'état de redémarrage progressif et de routeur
CN101197733A (zh) 网络连通性的自动检测方法及装置
CN110417564B (zh) 全网状的链路保护方法、装置、设备及存储介质
CN101478469B (zh) Rrpp环链路切换的方法和系统
CN101800774A (zh) 一种接入环保护方法及接入环保护网络
WO2011076024A1 (fr) Système de réseau de commutation d'étiquettes multiprotocoles de transmission et procédé de protection des liaisons
CN102238067B (zh) 一种快速环网保护协议环上的切换方法和装置
WO2013049981A1 (fr) Procédé et système de protection de réseau en anneau hybride fondés sur un chemin partagé
CN101155179B (zh) 一种多协议标签交换中环路拆除的方法
WO2010121459A1 (fr) Procédé et système pour mettre en oeuvre une protection et une reprise dans un réseau optique à commutation automatique
WO2012106976A1 (fr) Procédé et dispositif de protection contre les défaillances
WO2011131069A1 (fr) Procédé de détection de liaisons d'association et dispositif distribué
US8868967B2 (en) Method and system for connection-error handling of service in an automatically switched optical network
WO2008040194A1 (fr) Procédé et système pour la protection d'un arbre de multidiffusion
WO2015168892A1 (fr) Procédé de commutation de protection, nœud et dispositif de commande
WO2012068866A1 (fr) Procédé et système de rafraîchissement d'une commande d'accès au support dans un réseau en anneau ethernet

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11739380

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11739380

Country of ref document: EP

Kind code of ref document: A1