WO2012058927A1 - 源路由环网保护的快速倒换方法、装置及系统 - Google Patents

源路由环网保护的快速倒换方法、装置及系统 Download PDF

Info

Publication number
WO2012058927A1
WO2012058927A1 PCT/CN2011/075459 CN2011075459W WO2012058927A1 WO 2012058927 A1 WO2012058927 A1 WO 2012058927A1 CN 2011075459 W CN2011075459 W CN 2011075459W WO 2012058927 A1 WO2012058927 A1 WO 2012058927A1
Authority
WO
WIPO (PCT)
Prior art keywords
node
service
tunnel
ring network
source routing
Prior art date
Application number
PCT/CN2011/075459
Other languages
English (en)
French (fr)
Inventor
谢密
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 WO2012058927A1 publication Critical patent/WO2012058927A1/zh

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42Loop networks
    • H04L12/437Ring fault isolation or reconfiguration

Definitions

  • the present invention relates to the field of communications, and in particular, to a fast switching method, apparatus, and system for source routing ring network protection. Background technique
  • the transmission network in the metropolitan area network mainly uses the ring network topology structure, and each ring node A,
  • B, C, D, E, and F hold the current ring topology information (Ring MAP) and service table, which are used to transmit service data streams.
  • the physical connection between adjacent nodes is called a segment.
  • high reliability is the first problem to be solved.
  • a segment between nodes or nodes fails, it can be quickly and efficiently switched to the protection tunnel, and the existing services are not affected.
  • carrier-class protection switching for 50ms.
  • SF Signal Failure
  • the source routing ring network protection switching method in the prior art is performed according to the following steps:
  • OAM Operaation Administration and Maintenance
  • the BC segment is detected.
  • Node B sends SF (B, C) to the west to notify the ring node, and the destination node identifier of the SF packet is
  • the node A After receiving the SF (B, C), the node A determines whether to switch the service affected by the faulty segment or the faulty node according to the faulty segment information in the SF packet, the ring diagram maintained by the node A, and the service table.
  • service 1 is ABCD, after the fault segment BC, so node A switches service 1 to protection tunnel AFED; for node A, because SF (B, C) destination node identifier is not the local node, node A Pass SF (B, C) to the west;
  • the node F receives the SF (B, C) transparently transmitted by the node A. Since the destination node identifier of the SF packet is not the local node, the node F transparently transmits the SF (B, C) to the west, and the F node according to the SF packet.
  • the fault segment information, the ring graph maintained by the node F, and the service table determine whether the node F is affected by the fault segment or the fault node to the protection tunnel.
  • the node C receives the SF (B, C) transparently transmitted by the node D
  • the node C terminates the SF (B, C) and according to the SF packet.
  • the fault segment information, the ring graph maintained by the node C, and the service table determine the service that the C node is affected by the fault segment to the protection tunnel.
  • node C also sends SF (C, B) to the east to notify each node on the ring to perform service switching.
  • SF C, B
  • each node on the ring needs to report the SF packet to the CPU.
  • the CPU determines whether the ring map and the service table maintained by the node need to be generated according to the fault information in the SF packet. Switching, this process takes a certain amount of time, especially when the ring carries a large number of services, the switching time of this scheme is difficult to meet the carrier-class protection switching requirement of 50ms.
  • the main purpose of the present invention is to provide a fast switching method, device and system for source routing ring network protection, which implements fast service switching, and still satisfies the carrier-class protection switching requirement of 50 ms when the traffic on the ring is large.
  • the present invention provides a fast switching method for source routing ring network protection, including:
  • the faulty node or the neighboring node of the faulty node sends a forward fault indication information FDI message to the network processor of the sink end of the service of the faulty segment or the faulty node; when the network processor receives the FDI
  • the packet is valid, it is determined whether the working tunnel of the service is valid.
  • the working tunnel is set to be invalid and the service is switched to the protection tunnel.
  • the performing the setting work tunnel is invalid and the service is switched to the protection tunnel. After that, it also includes:
  • the faulty node or the neighboring node of the faulty node sends the forward fault indication information FDI message to the network processor of the sink end of the service of the faulty segment or the faulty node, including: the phase of the faulty segment node or the faulty node
  • the neighboring node queries the service passing the faulty segment or the faulty node according to the service table of the node;
  • the determining whether the working tunnel of the service is valid includes:
  • the working tunnel valid flag is queried according to the tunnel identifier in the FDI.
  • the present invention also provides a first source routing ring network node, including:
  • the query module is configured to query, according to the service table of the node, a service that passes through the fault segment or the faulty node;
  • a sending module configured to send an FDI packet to a network processor of the sink of the service.
  • the present invention also provides a second source routing ring network node, including a network processor, where the network processor includes:
  • a receiving module configured to receive, when a fault occurs, an FDI packet sent by a faulty node or an adjacent node of the faulty node;
  • the determining module is configured to determine whether the working tunnel of the service is valid when the FDI packet is received; and the switching module is configured to: when the working tunnel is valid, set the working tunnel to be invalid and switch the service to the protection tunnel.
  • the determining module includes:
  • a first determining unit configured to determine whether the destination node identifier in the FDI packet is a local end
  • the query unit is configured to: when the destination node is identified as the local end, query the working tunnel valid flag according to the tunnel identifier in the FDI packet;
  • the second determining unit is configured to determine, according to the working tunnel valid flag bit, whether the working tunnel is valid.
  • the network processor further includes:
  • the reporting module is used to report the fault to the CPU of the local node and decide whether to switch.
  • the present invention also provides a fast switching system for source routing ring network protection, including a first source routing ring network node and a second source routing ring network node, where
  • a first source routing ring network node configured to send a forward fault indication information FDI message to a network processor of a service end of the service that passes the fault segment or the fault node when a fault occurs;
  • the second source routing ring network node includes a network processor, where the network processor is configured to determine whether the working tunnel of the service is valid when the FDI packet is received, and set the working tunnel to be invalid when the working tunnel is valid. Switch the service to the protection tunnel.
  • the network processor further includes:
  • the reporting module is used to report the fault to the CPU of the local node and decide whether to switch.
  • the first source routing ring network node includes:
  • the query module is configured to query, according to the service table of the node, a service that passes through the fault segment or the faulty node;
  • a sending module configured to send an FDI packet to a network processor of the sink of the service.
  • the second source routing ring network node includes a network processor, and the network processor includes:
  • a receiving module configured to receive, when a fault occurs, an FDI packet sent by a faulty node or an adjacent node of the faulty node;
  • the determining module is configured to: when the FDI packet is received, determine whether the working tunnel of the service is valid; and the switching module is configured to: when the working tunnel is valid, set the working tunnel to be invalid and switch the service to the protection tunnel.
  • the determining module includes:
  • the first determining unit is configured to determine whether the destination node identifier in the FDI packet is the local end, and the query unit is configured to: when the destination node identifier is the local end, query the working tunnel valid flag according to the tunnel identifier in the FDI packet ;
  • the second determining unit is configured to determine, according to the working tunnel valid flag bit, whether the working tunnel is valid.
  • the network processor further includes:
  • the reporting module is used to report the fault to the CPU of the local node and decide whether to switch.
  • the present invention provides a fast switching method, device and system for source routing ring network protection.
  • the faulty node or the adjacent node of the faulty node first route the ring network node to the sink of the affected service.
  • the second source routing ring network node directly sends an FDI packet to notify the network processor of the second source routing ring network node of the affected service to directly perform service switching, and the network processor reports the second source routing ring network node again.
  • the CPU performs the final decision by the CPU, thereby realizing fast service switching, and still satisfies the carrier-class protection switching requirement of 50 ms when the traffic on the ring is large.
  • FIG. 1 is a schematic structural diagram of a prior art source routing ring network
  • FIG. 2 is a schematic diagram of signaling of a fast switching method for source routing ring network protection in the prior art
  • FIG. 3 is a schematic flowchart of a method for rapidly switching a source routing ring network according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of sending a FDI packet in an embodiment of a fast switching method for source routing ring network protection according to an embodiment of the present invention
  • FIG. 6 is a schematic flowchart of a determining process in an embodiment of a fast switching method for source routing ring network protection according to the present invention
  • FIG. 7 is a schematic flowchart diagram of still another embodiment of a fast switching method for protecting a source routing ring network according to the present invention
  • 8 is a schematic structural diagram of an embodiment of a first source routing ring network node according to the present invention
  • FIG. 9 is a schematic structural diagram of an embodiment of a second source routing ring network node according to the present invention
  • FIG. 10 is a schematic structural diagram of a judging module in an embodiment of a second source routing ring network node according to the present invention.
  • FIG. 11 is a schematic structural diagram of still another embodiment of a second source routing ring network node according to the present invention
  • FIG. 12 is a schematic structural diagram of an embodiment of a fast switching system for source routing ring network protection according to the present invention. detailed description
  • the present invention provides a fast switching method, device and system for source routing ring network protection.
  • the faulty node or the adjacent node of the faulty node first route the ring network node to the sink of the affected service.
  • the second source routing ring network node directly sends an FDI packet to notify the network processor of the second source routing ring network node of the affected service to directly perform service switching, and the network processor reports the second source routing ring network node again.
  • the final decision is made by the CPU.
  • an embodiment of a fast switching method for source routing ring network protection includes the following steps:
  • Step S101 When a fault occurs, the faulty node or the neighboring node of the faulty node sends the forward fault indication information FDI to the network processor of the sink end of the service of the faulty segment or the faulty node.
  • the faulty node or the neighboring node of the faulty node detects the fault, and then queries the service of the faulty segment or the faulty node according to the service table of the node, and sends the service to the affected end.
  • the network processor sends an FDI packet to notify the sink of the affected service. For example, when the BC segment fails, the working tunnel A-B-C-D of service 1 and the sink end of service 1 are nodes 8 and 0. Then, Node B sends an FDI packet to Node A, and Node C sends an FDI packet to Node D.
  • Step S102 When the service network processor of the service receives the FDI " ⁇ ", the service is determined. Whether the working tunnel is valid.
  • the network processor of the nodes A and D When the network processor of the nodes A and D receives the FDI packet, it first determines whether the destination node identifier of the FDI packet is the local node. When the destination node of the FDI packet is the node, the FDI packet is terminated. Determine whether the working tunnel of service 1 is valid.
  • the FDI packet includes the tunnel label.
  • the nodes A and D obtain the tunnel protection group information based on the tunnel label check tunnel table.
  • the tunnel protection group information mainly includes the primary tunnel information, the backup tunnel information, and the effective identifier of the working tunnel. Marks whether the working tunnel is valid. For other nodes on the ring, when the FDI packet is received, the destination node identifier in the FDI packet is not the local node, and then continues to be transmitted to the upper and lower nodes of the ring.
  • Step S103 When the working tunnel is valid, set the working tunnel to be invalid and switch the service to the protection tunnel.
  • the network processors of nodes A and D learn from themselves, set the working tunnel to be invalid, and quickly switch the service to the protection tunnel. Instead of waiting for the CPU's switching command.
  • the present invention provides a fast switching method for source routing ring network protection.
  • the first node of the faulty node or the adjacent node of the faulty node routes the ring network node to the second source of the affected service.
  • the network processor of the ring network node directly sends FDI packets to notify the network processor to directly perform service switching, thereby implementing fast service switching.
  • the carrier-class protection switching requirement of 50 ms is still met.
  • step S101 may include:
  • Step S1011 The faulty node or the neighboring node of the faulty node queries the service passing the faulty segment or the faulty node according to the service table of the node.
  • Step S1012 Send an FDI message to the network processor of the service provider.
  • step S102 may include:
  • Step S1021 Determine whether the destination node identifier in the FDI packet is the local end.
  • Step S1022 When the destination node is identified as the local end, query the working tunnel valid flag according to the tunnel identifier in the FDI packet.
  • Step S1023 Determine whether the working tunnel is valid according to the working tunnel effective flag.
  • the method may further include:
  • step S104 the fault is reported to the CPU of the sink, and the decision is made whether the switchover occurs.
  • the network processor of the adjacent node of the faulty node or the faulty node sends the FDI packet to the CPU of this node for processing. After the CPU makes a decision, the CPU sends a switching command to make the switching status of the network processor of the local node and the upper-layer CPU consistent.
  • the present invention provides a fast switching method for source routing ring network protection.
  • the first node of the faulty node or the adjacent node of the faulty node routes the ring network node to the second source of the affected service.
  • the network processor of the ring network node directly sends the FDI packet to notify the network processor to directly perform the service switching.
  • the network processor reports the CPU again, and the CPU makes the final decision, thereby realizing the fast service switching and making the traffic on the ring large.
  • the carrier-class protection switching requirement of 50ms is still met.
  • the first source routing ring network node 10 of the present invention is provided.
  • the method includes: the query module 11 is configured to query the service passing the fault segment or the fault node according to the service table of the node.
  • the sending module 12 is configured to send the FDI message to the network processor of the service end.
  • the query module 11 queries the faulty segment or the faulty node according to the service table of the node.
  • Service, sending module 12 to the network of the affected service's sink The processor sends an FDI packet to notify the sink of the affected service. For example, when the BC segment fails, the working tunnel ABCD of service 1 and the sink end of service 1 are nodes A and 0. Then, the node B sends an FDI message to the node A, and the node C sends an FDI message to the node D.
  • the network processor of the nodes A and D When the network processor of the nodes A and D receives the FDI packet, it first determines whether the destination node identifier of the FDI packet is the local node. When the destination node of the FDI packet is the node, the FDI packet is terminated. Determine whether the working tunnel of service 1 is valid.
  • the FDI packet includes the tunnel label.
  • the nodes A and D obtain the tunnel protection group information based on the tunnel label check tunnel table.
  • the tunnel protection group information mainly includes the primary tunnel information, the backup tunnel information, and the effective identifier of the working tunnel. Marks whether the working tunnel is valid. For other nodes on the ring, when the FDI packet is received, the destination node identifier in the FDI packet is not the local node, and then continues to be transmitted to the upper and lower nodes of the ring.
  • the network processors of nodes A and D learn from themselves, set the working tunnel to be invalid, and quickly switch the service to the protection tunnel. Instead of waiting for the CPU's switching command.
  • the present invention provides a first source routing ring network node 10, and when a fault occurs on the ring, directly sends a FDI packet to the second source routing ring network node of the affected service, and notifies the second source route of the affected service sink.
  • the network processor of the ring network node directly performs service switching, so that the carrier-class protection switching requirement of 50 ms is still met when the traffic on the ring is large.
  • a second source routing ring network node 20 of the present invention which includes a network processor 25, and the network processor 25 includes:
  • the receiving module 21 is configured to receive an FDI packet sent by a faulty node or a neighboring node of the faulty node when a fault occurs.
  • the determining module 22 is configured to determine, when the FDI packet is received, whether the working tunnel of the service is valid.
  • the switching module 23 is configured to: when the working tunnel is valid, set the working tunnel to be invalid and switch the service to the protection tunnel.
  • the faulty node or the neighboring node of the faulty node detects the fault, and then queries the service of the faulty segment or the faulty node according to the service table of the node, and The FDI message is sent to the network processor 25 of the sink of the affected service to notify the sink of the affected service.
  • the network processor 25 of the sink of the affected service For example, when the BC segment fails, the working tunnel A-B-C-D of service 1 and the sink end of service 1 are nodes A and 0. Then, the node B sends the FDI ⁇ message to the node A, and the node C sends the FDI message to the node D.
  • the determining module 22 first determines whether the destination node identifier of the FDI packet is the node, and the destination node of the FDI packet.
  • the FDI packet is terminated and the working tunnel of service 1 is determined to be valid.
  • the FDI packet includes the tunnel label.
  • the nodes A and D obtain the tunnel protection group information based on the tunnel label check tunnel table.
  • the tunnel protection group information mainly includes the primary tunnel information, the backup tunnel information, and the effective identifier of the working tunnel. Marks whether the working tunnel is valid. For other nodes on the ring, when the FDI packet is received, the destination node identifier in the FDI packet is not the local node, and then continues to the next node on the ring.
  • the switching module 23 learns itself, sets the working tunnel to be invalid, and quickly switches the service to the protection tunnel without waiting. CPU switching command.
  • the present invention proposes a second source routing ring network node 20, which receives FDI packets sent by the first source routing ring network node of the neighboring node of the faulty node or the faulty node when the fault occurs on the ring, and directly performs service switching, thereby Fast service switching is implemented, and the carrier-class protection switching requirement of 50ms is still met when the traffic on the ring is large.
  • the determining module 22 may include: The first determining unit 221 is configured to determine whether the destination node identifier in the FDI packet is the local end.
  • the query unit 222 is configured to query the working tunnel valid flag according to the tunnel identifier in the FDI packet when the destination node is identified as the local end.
  • the second determining unit 223 is configured to determine whether the working tunnel is valid according to the working tunnel valid flag.
  • the reporting module 24 is further configured to: report the fault to the CPU of the local node, and determine whether the switching occurs.
  • the reporting module 24 sends the FDI packet to the CPU of the local node for processing. After the CPU makes a decision, the CPU sends a switching command to make the switching status of the second source routing ring node 20 and the upper CPU consistent.
  • the present invention proposes a second source routing ring network node 20, when a failure occurs on the ring, receiving a FDI message sent by the first source routing ring network node of the adjacent node of the faulty node or the faulty node, and the second source routing ring network
  • the network processor 25 of the node 20 directly performs service switching, thereby implementing fast service switching, and still satisfies the carrier-class protection switching requirement of 50 ms when the traffic on the ring is large. Further, the network processor 25 reports the fault to the CPU of the local node, and the CPU determines whether the switching occurs to keep the switching state consistent.
  • an embodiment of a fast switching system for protecting a source routing ring network of the present invention including: a first source routing ring network node 10 and a second source routing ring network node 20, where
  • the first source routing ring network node 10 is configured to send a forward fault indication information FDI message to the network processor 25 of the service end of the service that passes the fault segment or the faulty node when a fault occurs.
  • the second source routing ring network node 20 includes a network processor 25, and the network processor 25 is configured to determine whether the working tunnel of the service is valid when the FDI packet is received, and set the working tunnel when the working tunnel is valid. Invalid and the business is switched to the protection tunnel.
  • the first source routing ring network node 10 and the second source routing ring network node 20 are the same as the first source routing ring network node 10 shown in FIG. 8 and the second source routing ring network node 20 shown in FIG. 9 to FIG. The structure and working principle are not described here.
  • the present invention provides a system for protection of a source routing ring network. When a fault occurs on the ring, the first node of the faulty node or the adjacent node of the faulty node routes the ring network node 10 to the second source routing ring of the affected service.
  • the network processor 25 of the network node 20 directly sends the FDI message, and notifies the network processor 25 to directly perform service switching. Further, the network processor 25 reports the CPU again, and the CPU makes the final decision.
  • the system protected by the source routing ring network of the present invention implements fast service switching, and still satisfies the carrier-class protection switching requirement of 50 ms when the traffic on the ring is large.

Description

源路由环网保护的快速倒换方法、 装置及系统 技术领域
本发明涉及通信领域, 尤其涉及一种源路由环网保护的快速倒换方法、 装置及系统。 背景技术
参照图 1 , 城域网中传送网主要釆用环网拓朴结构, 每个环上节点 A、
B、 C、 D、 E和 F保存当前最新的环拓朴信息一环图 (Ring MAP )和业务 表, 用于传送业务数据流, 相邻节点之间的物理连接称为段。 传送网为达 到电信极要求, 高可靠性是其首先要解决的问题, 在节点或节点之间的段 发生故障时, 能够快速有效地倒换到保护隧道上, 并且保证已有业务不受 影响, 以达到 50ms的电信级保护倒换的要求。 目前当故障段或故障节点的 相邻节点检测到故障时, 将发送信号失效信息(SF, Signal Failure )给环上 各节点来指示故障段或故障节点的失效, 当各节点接收到 SF报文时, 判断 是否有通过故障段或故障节点的业务, 如果有, 将该业务数据流从工作隧 道倒换到保护隧道上。
参照图 2, 现有技术中的源路由环网保护倒换方法按照下列步骤进行: 当城域网中某节点的操作管理和维护模块 ( OAM , Operation Administration and Maintenance )检测到故障时, 以 BC段发生故障为例, 在故障段向西方向:
节点 B向西发送 SF ( B, C )通知环上节点, SF报文目的节点标识为
C, 源节点标识为 B;
节点 A收到 SF ( B, C )后, 根据 SF报文中的故障段信息、 节点 A维 护的环图和业务表决定是否将节点 A受故障段或故障节点影响的业务倒换 到保护隧道, 例如业务 1为 A-B-C-D, 经过了故障段 BC段, 所以节点 A 将业务 1倒换到保护隧道 A-F-E-D; 对节点 A, 由于 SF (B, C) 目的节点 标识不是本节点, 所以节点 A将 SF (B, C)继续向西透传;
节点 F收到节点 A透传的 SF (B, C), 由于 SF报文目的节点标识不 是本节点, 所以节点 F将 SF (B, C) 向西透传, 同时 F节点根据 SF报文 中的故障段信息、 节点 F维护的环图和业务表决定是否将节点 F受故障段 或故障节点影响的业务到保护隧道。 以此类推, 当节点 C收到节点 D透传 的 SF (B, C) 时, 由于 SF报文目的节点标识是本节点, 所以节点 C终结 SF (B, C), 同时根据 SF报文中的故障段信息、 节点 C维护的环图和业务 表决定将 C节点受故障段影响的业务到保护隧道。
同理, 节点 C也向东发送 SF (C, B), 通知环上各节点进行业务倒换。 在这种方案中,环上各节点收到 SF报文后,都需要将 SF报文上报 CPU, 由 CPU根据 SF报文中的故障信息, 该节点维护的环图和业务表决策是否 需要发生倒换, 这个过程需要耗费一定时间, 特别是当环上承载大量业务 时, 这种方案的倒换时间很难满足 50ms的电信级保护倒换要求。 发明内容
本发明的主要目的为提供一种源路由环网保护的快速倒换方法、 装置 及系统, 实现快速业务倒换, 使环上业务量大时仍然满足 50ms的电信级保 护倒换要求。
本发明提出一种源路由环网保护的快速倒换方法, 包括:
当发生故障时, 故障段节点或故障节点的相邻节点向经过该故障段或 故障节点的业务的宿端的网络处理器发送前向故障指示信息 FDI报文; 当所述网络处理器收到 FDI报文时,判断该业务的工作隧道是否有效; 当工作隧道有效时, 设置该工作隧道为无效且将业务倒换到保护隧道。 优选地, 在执行所述设置工作隧道为无效且将业务倒换到保护隧道之 后, 还包括:
将故障上报所述宿端的 CPU, 决策是否发生倒换。
优选地, 所述故障段节点或故障节点的相邻节点向经过该故障段或故 障节点的业务的宿端的网络处理器发送前向故障指示信息 FDI报文包括: 故障段节点或故障节点的相邻节点根据本节点的业务表查询经过该故 障段或故障节点的业务;
向所述业务的宿端的网络处理器发送 FDI报文。
优选地, 所述判断业务的工作隧道是否有效包括:
判断所述 FDI报文中目的节点标识是否为本端;
当目的节点标识为本端时, 才艮据 FDI ^艮文中的隧道标识查询工作隧道 有效标志位;
根据工作隧道有效标志位判断工作隧道是否有效。
本发明还提出一种第一源路由环网节点, 包括:
查询模块, 用于根据本节点的业务表查询经过该故障段或故障节点的 业务;
发送模块, 用于向所述业务的宿端的网络处理器发送 FDI报文。
本发明还提出一种第二源路由环网节点, 包括网络处理器, 所述网络 处理器包括:
接收模块, 用于当发生故障时, 接收故障段节点或故障节点的相邻节 点发送的 FDI报文;
判断模块, 用于当收到 FDI报文时, 判断该业务的工作隧道是否有效; 倒换模块, 用于当工作隧道有效时, 设置该工作隧道为无效且将业务 倒换到保护隧道。
优选地, 所述判断模块包括:
第一判断单元, 用于判断所述 FDI报文中目的节点标识是否为本端; 查询单元, 用于当目的节点标识为本端时, 根据 FDI报文中的隧道标 识查询工作隧道有效标志位;
第二判断单元, 用于根据工作隧道有效标志位判断工作隧道是否有效。 优选地, 所述网络处理器还包括:
上报模块, 用于将故障上报本节点的 CPU, 决策是否发生倒换。
本发明还提出一种源路由环网保护的快速倒换系统, 包括第一源路由 环网节点和第二源路由环网节点, 其中,
第一源路由环网节点, 用于当发生故障时, 向经过该故障段或故障节 点的业务的宿端的网络处理器发送前向故障指示信息 FDI报文;
第二源路由环网节点, 包括网络处理器, 所述网络处理器用于当收到 FDI报文时, 判断该业务的工作隧道是否有效, 以及当工作隧道有效时,设 置该工作隧道为无效且将业务倒换到保护隧道。
优选地, 所述网络处理器还包括:
上报模块, 用于将故障上报本节点的 CPU, 决策是否发生倒换。
优选地, 所述第一源路由环网节点包括:
查询模块, 用于根据本节点的业务表查询经过该故障段或故障节点的 业务;
发送模块, 用于向所述业务的宿端的网络处理器发送 FDI报文。
优选地, 所述第二源路由环网节点包括网络处理器, 所述网络处理器 包括:
接收模块, 用于当发生故障时, 接收故障段节点或故障节点的相邻节 点发送的 FDI报文;
判断模块, 用于当收到 FDI报文时, 判断该业务的工作隧道是否有效; 倒换模块, 用于当工作隧道有效时, 设置该工作隧道为无效且将业务 倒换到保护隧道。 优选地, 所述判断模块包括:
第一判断单元, 用于判断所述 FDI报文中目的节点标识是否为本端; 查询单元, 用于当目的节点标识为本端时, 根据 FDI报文中的隧道标 识查询工作隧道有效标志位;
第二判断单元, 用于根据工作隧道有效标志位判断工作隧道是否有效。 优选地, 所述网络处理器还包括:
上报模块, 用于将故障上报本节点的 CPU, 决策是否发生倒换。
本发明提出一种源路由环网保护的快速倒换方法、 装置及系统, 当环 上发生故障时, 故障段节点或故障节点的相邻节点第一源路由环网节点向 受影响业务的宿端第二源路由环网节点直接发送 FDI报文, 通知受影响业 务的宿端第二源路由环网节点的网络处理器直接进行业务倒换, 该网络处 理器再上报第二源路由环网节点的 CPU, 由 CPU进行最后的决策, 从而实 现了快速业务倒换, 实现环上业务量大时仍然满足 50ms的电信级保护倒换 要求。 附图说明
图 1为现有技术源路由环网的结构示意图;
图 2为现有技术中源路由环网保护的快速倒换方法的信令示意图; 图 3为本发明源路由环网保护的快速倒换方法一实施例的流程示意图; 图 4为本发明源路由环网保护的快速倒换方法一实施例的信令示意图; 图 5为本发明源路由环网保护的快速倒换方法一实施例中发送 FDI报 文的流程示意图;
图 6为本发明源路由环网保护的快速倒换方法一实施例中判断过程的 流程示意图;
图 7为本发明源路由环网保护的快速倒换方法又一实施例的流程示意 图; 图 8为本发明第一源路由环网节点一实施例的结构示意图; 图 9为本发明第二源路由环网节点一实施例的结构示意图;
图 10 为本发明第二源路由环网节点一实施例中判断模块的结构示意 图;
图 11为本发明第二源路由环网节点又一实施例的结构示意图; 图 12 为本发明源路由环网保护的快速倒换系统一实施例的结构示意 图。 具体实施方式
本发明提出一种源路由环网保护的快速倒换方法、 装置及系统, 当环 上发生故障时, 故障段节点或故障节点的相邻节点第一源路由环网节点向 受影响业务的宿端第二源路由环网节点直接发送 FDI报文, 通知受影响业 务的宿端第二源路由环网节点的网络处理器直接进行业务倒换, 该网络处 理器再上报第二源路由环网节点的 CPU, 由 CPU进行最后的决策。
参照图 3、 图 4, 提出本发明一种源路由环网保护的快速倒换方法一实 施例, 包括以下步骤:
步骤 S101 , 当发生故障时, 故障段节点或故障节点的相邻节点向经过 该故障段或故障节点的业务的宿端的网络处理器发送前向故障指示信息 FDI才艮文。
当环上某段或某节点发生故障, 故障段节点或故障节点的相邻节点检 测到故障后, 根据本节点的业务表查询经过故障段或故障节点的业务, 并 向受影响业务的宿端的网络处理器发送 FDI报文,通知受影响业务的宿端。 例如当 BC段发生故障时,业务 1的工作隧道 A-B-C-D ,业务 1的宿端为节 点八和0。 则节点 B向节点 A发送 FDI报文, 节点 C向节点 D发送 FDI 报文。
步骤 S102 , 当业务的宿端网络处理器收到 FDI " ^艮文时, 判断该业务的 工作隧道是否有效。
当节点 A和 D的网络处理器收到 FDI报文时,首先判断该 FDI报文的 目的节点标识是否为本节点, 当 FDI报文的目的节点标识为本节点时, 终 结该 FDI报文并判断业务 1的工作隧道是否有效。 FDI报文中包括隧道标 签, 节点 A和 D根据隧道标签查隧道表获取隧道保护组信息, 隧道保护组 信息主要包括主隧道信息、 备隧道信息和工作隧道有效标志位等, 工作隧 道有效标志位标志工作隧道是否有效。 对于环上其它节点, 收到该 FDI报 文时, 由于 FDI报文中的目的节点标识不是本节点, 则继续传递到环上下 一节点。
步骤 S103 , 当工作隧道有效时, 设置该工作隧道为无效且将业务倒换 到保护隧道。
如果工作隧道无效, 说明业务已经倒换到保护隧道, 不需要再进行快 速倒换; 如果工作隧道有效时, 节点 A和 D的网络处理器自学习, 设置工 作隧道为无效并将业务快速倒换到保护隧道, 而不需要等待 CPU的倒换命 令。
本发明提出一种源路由环网保护的快速倒换方法, 当环上发生故障时, 故障段节点或故障节点的相邻节点第一源路由环网节点向受影响业务的宿 端第二源路由环网节点的网络处理器直接发送 FDI报文, 通知该网络处理 器直接进行业务倒换, 从而实现了快速业务倒换, 实现环上业务量大时仍 然满足 50ms的电信级保护倒换要求。
参照图 5 , 在源路由环网保护的快速倒换方法一实施例中, 步骤 S101 可包括:
步骤 S1011 ,故障段节点或故障节点的相邻节点根据本节点的业务表查 询经过该故障段或故障节点的业务。
步骤 S1012 , 向业务的宿端的网络处理器发送 FDI ^艮文。 参照图 6, 在源路由环网保护的快速倒换方法一实施例中, 步骤 S102 可包括:
步骤 S1021 , 判断 FDI报文中目的节点标识是否为本端。
步骤 S1022, 当目的节点标识为本端时, 根据 FDI报文中的隧道标识 查询工作隧道有效标志位。
步骤 S1023 , 根据工作隧道有效标志位判断工作隧道是否有效。
参照图 7,提出源路由环网保护的快速倒换方法又一实施例, 在上述实 施例中, 在步骤 S103之后, 还可以包括:
步骤 S104, 将故障上报宿端的 CPU, 决策是否发生倒换。
故障段节点或故障节点的相邻节点的网络处理器将 FDI报文上送本节 点的 CPU处理。 CPU经过决策后下发倒换命令, 以使本节点网络处理器和 上层 CPU的倒换状态一致。
本发明提出一种源路由环网保护的快速倒换方法, 当环上发生故障时, 故障段节点或故障节点的相邻节点第一源路由环网节点向受影响业务的宿 端第二源路由环网节点的网络处理器直接发送 FDI报文, 通知该网络处理 器直接进行业务倒换, 网络处理器再上报 CPU, 由 CPU进行最后的决策, 从而实现了快速业务倒换,使环上业务量大时仍然满足 50ms的电信级保护 倒换要求。
参照图 8, 提出本发明第一源路由环网节点 10—实施例, 包括: 查询模块 11 , 用于根据本节点的业务表查询经过该故障段或故障节点 的业务。
发送模块 12 , 用于向业务的宿端的网络处理器发送 FDI报文。
当环上某段或某节点发生故障, 故障段节点或故障节点的相邻节点第 一源路由环网节点 10检测到故障后, 查询模块 11根据本节点的业务表查 询经过故障段或故障节点的业务, 发送模块 12向受影响业务的宿端的网络 处理器发送 FDI报文, 通知受影响业务的宿端。 例如当 BC段发生故障时, 业务 1的工作隧道 A-B-C-D, 业务 1的宿端为节点 A和0。 则节点 B向节 点 A发送 FDI报文, 节点 C向节点 D发送 FDI报文。
当节点 A和 D的网络处理器收到 FDI报文时,首先判断该 FDI报文的 目的节点标识是否为本节点, 当 FDI报文的目的节点标识为本节点时, 终 结该 FDI报文并判断业务 1的工作隧道是否有效。 FDI报文中包括隧道标 签, 节点 A和 D根据隧道标签查隧道表获取隧道保护组信息, 隧道保护组 信息主要包括主隧道信息、 备隧道信息和工作隧道有效标志位等, 工作隧 道有效标志位标志工作隧道是否有效。 对于环上其它节点, 收到该 FDI报 文时, 由于 FDI报文中的目的节点标识不是本节点, 则继续传递到环上下 一节点。
如果工作隧道无效, 说明业务已经倒换到保护隧道, 不需要再进行快 速倒换; 如果工作隧道有效时, 节点 A和 D的网络处理器自学习, 设置工 作隧道为无效并将业务快速倒换到保护隧道, 而不需要等待 CPU的倒换命 令。
本发明提出第一源路由环网节点 10, 当环上发生故障时, 向受影响业 务的宿端第二源路由环网节点直接发送 FDI报文, 通知受影响业务的宿端 第二源路由环网节点的网络处理器直接进行业务倒换, 使环上业务量大时 仍然满足 50ms的电信级保护倒换要求。
参照图 9, 提出本发明第二源路由环网节点 20—实施例, 包括网络处 理器 25 , 该网络处理器 25包括:
接收模块 21 , 用于当发生故障时, 接收故障段节点或故障节点的相邻 节点发送的 FDI报文。
判断模块 22, 用于当收到 FDI报文时, 判断该业务的工作隧道是否有 效。 倒换模块 23 , 用于当工作隧道有效时, 设置该工作隧道为无效且将业 务倒换到保护隧道。
当环上某段或某节点发生故障, 故障段节点或故障节点的相邻节点第 一源路由环网节点检测到故障后, 根据本节点的业务表查询经过故障段或 故障节点的业务, 并向受影响业务的宿端的网络处理器 25发送 FDI报文, 通知受影响业务的宿端。 例如当 BC 段发生故障时, 业务 1 的工作隧道 A-B-C-D ,业务 1的宿端为节点 A和0。则节点 B向节点 A发送 FDI ^艮文, 节点 C向节点 D发送 FDI报文。
当第二源路由环网节点 20即节点 A和 D的接收模块 21收到 FDI报文 时, 判断模块 22 首先判断该 FDI报文的目的节点标识是否为本节点, 当 FDI报文的目的节点标识为本节点时, 终结该 FDI报文并判断业务 1的工 作隧道是否有效。 FDI报文中包括隧道标签, 节点 A和 D根据隧道标签查 隧道表获取隧道保护组信息, 隧道保护组信息主要包括主隧道信息、 备隧 道信息和工作隧道有效标志位等, 工作隧道有效标志位标志工作隧道是否 有效。 对于环上其它节点, 收到该 FDI报文时, 由于 FDI报文中的目的节 点标识不是本节点, 则继续传递到环上下一节点。
如果工作隧道无效, 说明业务已经倒换到保护隧道, 不需要再进行快 速倒换; 如果工作隧道有效时, 倒换模块 23 自学习, 设置工作隧道为无效 并将业务快速倒换到保护隧道, 而不需要等待 CPU的倒换命令。
本发明提出第二源路由环网节点 20, 当环上发生故障时, 接收故障段 节点或故障节点的相邻节点第一源路由环网节点发送的 FDI报文, 并直接 进行业务倒换, 从而实现了快速业务倒换, 实现环上业务量大时仍然满足 50ms的电信级保护倒换要求。
参照图 10, 在第二源路由环网节点 20—实施例中, 判断模块 22可包 括: 第一判断单元 221 , 用于判断 FDI报文中目的节点标识是否为本端。 查询单元 222 ,用于当目的节点标识为本端时,根据 FDI报文中的隧道 标识查询工作隧道有效标志位。
第二判断单元 223 ,用于根据工作隧道有效标志位判断工作隧道是否有 效。
参照图 11 , 在上述第二源路由环网节点 20实施例中, 还可包括: 上报模块 24, 用于将故障上报本节点的 CPU, 决策是否发生倒换。 上报模块 24将 FDI报文上送本节点的 CPU处理。 CPU经过决策后下 发倒换命令, 以使第二源路由环网节点 20和上层 CPU的倒换状态一致。
本发明提出第二源路由环网节点 20, 当环上发生故障时, 接收故障段 节点或故障节点的相邻节点第一源路由环网节点发送的 FDI报文, 由第二 源路由环网节点 20的网络处理器 25直接进行业务倒换, 从而实现了快速 业务倒换, 使环上业务量大时仍然满足 50ms的电信级保护倒换要求。 进一 步地, 网络处理器 25将故障上报本节点的 CPU, 由 CPU决策是否发生倒 换, 以保持倒换状态一致。
参照图 12 , 提出本发明源路由环网保护的快速倒换系统一实施例, 包 括: 第一源路由环网节点 10和第二源路由环网节点 20, 其中,
第一源路由环网节点 10, 用于当发生故障时, 向经过该故障段或故障 节点的业务的宿端的网络处理器 25发送前向故障指示信息 FDI报文。
第二源路由环网节点 20, 包括网络处理器 25 , 该网络处理器 25用于 当收到 FDI报文时, 判断该业务的工作隧道是否有效, 以及当工作隧道有 效时, 设置该工作隧道为无效且将业务倒换到保护隧道。
第一源路由环网节点 10和第二源路由环网节点 20同图 8所示的第一 源路由环网节点 10和图 9至图 11所示的第二源路由环网节点 20, 其结构 和工作原理此处不再赘述。 本发明提出一种源路由环网保护的系统, 当环上发生故障时, 故障段 节点或故障节点的相邻节点第一源路由环网节点 10向受影响业务的宿端第 二源路由环网节点 20的网络处理器 25直接发送 FDI ^艮文, 通知网络处理 器 25直接进行业务倒换。 进一步地, 网络处理器 25再上报 CPU, 由 CPU 进行最后的决策。 本发明的源路由环网保护的系统实现了快速业务倒换, 实现环上业务量大时仍然满足 50ms的电信级保护倒换要求。
以上所述仅为本发明的优选实施例, 并非因此限制本发明的专利范围, 凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换, 或直 接或间接运用在其他相关的技术领域, 均同理包括在本发明的专利保护范 围内。

Claims

权利要求书
1、 一种源路由环网保护的快速倒换方法, 其特征在于, 该方法包括: 当发生故障时, 故障段节点或故障节点的相邻节点向经过所述故障段 或故障节点的业务的宿端的网络处理器发送前向故障指示信息(FDI )报文; 当所述业务的宿端网络处理器收到所述 FDI报文时, 判断所述业务的 工作隧道是否有效;
当工作隧道有效时, 设置所述工作隧道为无效且将所述业务倒换到保 护隧道。
2、 根据权利要求 1所述的源路由环网保护的快速倒换方法, 其特征在 于, 在执行所述设置所述工作隧道为无效且将所述业务倒换到保护隧道之 后, 该方法还包括:
将故障上报给所述宿端的 CPU, 决策是否发生倒换。
3、 根据权利要求 1或 2所述的源路由环网保护的快速倒换方法, 其特 征在于, 所述故障段节点或故障节点的相邻节点向经过所述故障段或故障 节点的业务的宿端的网络处理器发送 FDI报文包括:
故障段节点或故障节点的相邻节点根据本节点的业务表查询经过所述 故障段或故障节点的业务;
向所述业务的宿端的网络处理器发送 FDI报文。
4、 根据权利要求 1或 2所述的源路由环网保护的快速倒换方法, 其特 征在于, 所述判断业务的工作隧道是否有效包括:
判断所述 FDI报文中目的节点标识是否为本端;
当目的节点标识为本端时, 才艮据 FDI ^艮文中的隧道标识查询工作隧道 有效标志位;
根据工作隧道有效标志位判断工作隧道是否有效。
5、 一种第一源路由环网节点, 其特征在于, 该节点包括: 查询模块, 用于根据本节点的业务表查询经过故障段或故障节点的业 务;
发送模块, 用于向所述业务的宿端的网络处理器发送 FDI报文。
6、 一种第二源路由环网节点, 包括网络处理器, 其特征在于, 所述网 络处理器包括:
接收模块, 用于当发生故障时, 接收故障段节点或故障节点的相邻节 点发送的 FDI报文;
判断模块, 用于当收到 FDI报文时, 判断业务的工作隧道是否有效; 倒换模块, 用于当工作隧道有效时, 设置所述工作隧道为无效且将所 述业务倒换到保护隧道。
7、 根据权利要求 6所述的第二源路由环网节点, 其特征在于, 所述判 断模块包括:
第一判断单元, 用于判断所述 FDI报文中目的节点标识是否为本端; 查询单元, 用于当目的节点标识为本端时, 根据 FDI报文中的隧道标 识查询工作隧道有效标志位;
第二判断单元, 用于根据工作隧道有效标志位判断工作隧道是否有效。
8、 根据权利要求 6或 7所述的第二源路由环网节点, 其特征在于, 所 述网络处理器还包括:
上报模块, 用于将故障上报本节点的 CPU, 决策是否发生倒换。
9、 一种源路由环网保护的快速倒换系统, 其特征在于, 该系统包括第 一源路由环网节点和第二源路由环网节点, 其中,
第一源路由环网节点, 用于当发生故障时, 向经过故障段或故障节点 的业务的宿端的网络处理器发送 FDI ^艮文;
第二源路由环网节点, 包括网络处理器, 所述网络处理器用于当收到 艮文时, 判断所述业务的工作隧道是否有效, 以及当工作隧道有效时, 设置所述工作隧道为无效且将所述业务倒换到保护隧道。
10、 根据权利要求 9所述的源路由环网保护的快速倒换系统, 其特征 在于, 所述网络处理器还包括:
上报模块, 用于将故障上报本节点的 CPU, 决策是否发生倒换。
11、 根据权利要求 9或 10所述的源路由环网保护的快速倒换系统, 其 特征在于, 所述第一源路由环网节点包括查询模块和发送模块; 其中, 查询模块, 用于根据本节点的业务表查询经过故障段或故障节点的业 务;
发送模块, 用于向所述业务的宿端的网络处理器发送 FDI报文。
12、 根据权利要求 9或 10所述的源路由环网保护的快速倒换系统, 其 特征在于, 所述第二源路由环网节点包括网络处理器, 所述网络处理器包 括接收模块、 判断模块和倒换模块; 其中,
接收模块, 用于当发生故障时, 接收故障段节点或故障节点的相邻节 点发送的 FDI报文;
判断模块, 用于当收到 FDI报文时, 判断业务的工作隧道是否有效; 倒换模块, 用于当工作隧道有效时, 设置所述工作隧道为无效且将所 述业务倒换到保护隧道。
13、 根据权利要求 12所述的源路由环网保护的快速倒换系统, 其特征 在于, 所述判断模块包括: 第一判断单元、 查询单元和第二判断单元; 其 中,
第一判断单元, 用于判断所述 FDI报文中目的节点标识是否为本端; 查询单元, 用于当目的节点标识为本端时, 根据 FDI报文中的隧道标 识查询工作隧道有效标志位;
第二判断单元, 用于根据工作隧道有效标志位判断工作隧道是否有效。
14、 根据权利要求 12所述的源路由环网保护的快速倒换系统, 其特征 在于, 所述网络处理器还包括: 上报模块, 用于将故障上报本节点的 CPU: 决策是否发生倒换。
PCT/CN2011/075459 2010-11-01 2011-06-08 源路由环网保护的快速倒换方法、装置及系统 WO2012058927A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010528443XA CN101986620A (zh) 2010-11-01 2010-11-01 源路由环网保护的快速倒换方法、装置及系统
CN201010528443.X 2010-11-01

Publications (1)

Publication Number Publication Date
WO2012058927A1 true WO2012058927A1 (zh) 2012-05-10

Family

ID=43710924

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/075459 WO2012058927A1 (zh) 2010-11-01 2011-06-08 源路由环网保护的快速倒换方法、装置及系统

Country Status (2)

Country Link
CN (1) CN101986620A (zh)
WO (1) WO2012058927A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103684951A (zh) * 2012-08-31 2014-03-26 中国移动通信集团公司 一种环网保护方法及系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101986620A (zh) * 2010-11-01 2011-03-16 中兴通讯股份有限公司 源路由环网保护的快速倒换方法、装置及系统
CN102857316B (zh) * 2011-06-29 2016-12-07 中兴通讯股份有限公司 一种实现源环网保护的方法及系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1756182A (zh) * 2004-09-30 2006-04-05 华为技术有限公司 多协议标签交换系统中的保护倒换方法
CN101986620A (zh) * 2010-11-01 2011-03-16 中兴通讯股份有限公司 源路由环网保护的快速倒换方法、装置及系统

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101521603B (zh) * 2008-12-26 2011-10-26 中兴通讯股份有限公司 一种快速检测链路连通性的方法及系统

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1756182A (zh) * 2004-09-30 2006-04-05 华为技术有限公司 多协议标签交换系统中的保护倒换方法
CN101986620A (zh) * 2010-11-01 2011-03-16 中兴通讯股份有限公司 源路由环网保护的快速倒换方法、装置及系统

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103684951A (zh) * 2012-08-31 2014-03-26 中国移动通信集团公司 一种环网保护方法及系统

Also Published As

Publication number Publication date
CN101986620A (zh) 2011-03-16

Similar Documents

Publication Publication Date Title
EP1845656B1 (en) A method for implementing master and backup transmission path
WO2008148296A1 (fr) Procédé de détection des anomalies, système de communication et routeur de commutation d'étiquettes
WO2006074596A1 (fr) Procede de commutation pour acheminement et dispositif en noeud de reseau
WO2007036106A1 (fr) Procede de commutation de protection de pseudo-cable dans le reseau a commutation de paquets et dispositif associe
US11146484B2 (en) Method, device, and system for deferring switchback
WO2011076029A1 (zh) 一种实现快速重路由的方法及装置
JP2006270169A (ja) パケット中継装置
WO2013185567A1 (zh) 一种分组传送网络保护倒换装置和方法
CN104270231B (zh) 一种实现双节点互联伪线的系统及方法
CN102264088A (zh) 伪线保护倒换实现方法及装置
CN111490933B (zh) 双向转发检测切换方法及边缘设备
WO2011095101A1 (zh) 一种分组传送网络的线性1:n保护方法、装置和系统
WO2011026319A1 (zh) 基于本地故障检测的环网保护方法及系统
WO2010028560A1 (zh) 在mesh网络中实现永久环网保护的方法
WO2008064612A1 (fr) Procédé, dispositif et système permettant d'effectuer un reroutage rapide dans un réseau mpls
WO2011140890A1 (zh) 实现快速重路由的方法及装置
WO2008017223A1 (fr) Procédé, appareil et réseau permettant de communiquer réciproquement des résultats de détection de pannes
WO2011091625A1 (zh) 一种业务保护方法及系统
US10033573B2 (en) Protection switching method, network, and system
JP5618946B2 (ja) 通信装置および通信システム
WO2012058927A1 (zh) 源路由环网保护的快速倒换方法、装置及系统
CN107547347B (zh) 基于vni的路径调整方法和装置
KR20130039312A (ko) 공유 메쉬 보호 절체 방법
WO2008040194A1 (fr) Procédé et système pour la protection d'un arbre de multidiffusion
WO2010003344A1 (zh) 环网故障处理方法、环网及运营商骨干设备

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: 11837454

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: 11837454

Country of ref document: EP

Kind code of ref document: A1