WO2011000181A1 - 环形光传送网中处理多跨段工作通道故障的方法及装置 - Google Patents

环形光传送网中处理多跨段工作通道故障的方法及装置 Download PDF

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Publication number
WO2011000181A1
WO2011000181A1 PCT/CN2009/074146 CN2009074146W WO2011000181A1 WO 2011000181 A1 WO2011000181 A1 WO 2011000181A1 CN 2009074146 W CN2009074146 W CN 2009074146W WO 2011000181 A1 WO2011000181 A1 WO 2011000181A1
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Prior art keywords
alarm
protection
oduk
channel
working
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PCT/CN2009/074146
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English (en)
French (fr)
Inventor
富森
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中兴通讯股份有限公司
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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
Priority to US13/380,866 priority Critical patent/US8755686B2/en
Priority to JP2012517998A priority patent/JP5317378B2/ja
Priority to BRPI0924971-0A priority patent/BRPI0924971B1/pt
Priority to KR1020127000335A priority patent/KR101399404B1/ko
Priority to EP09846710.3A priority patent/EP2451094B1/en
Priority to ES09846710.3T priority patent/ES2683023T3/es
Publication of WO2011000181A1 publication Critical patent/WO2011000181A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27Arrangements for networking
    • H04B10/275Ring-type networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/08Intermediate station arrangements, e.g. for branching, for tapping-off
    • H04J3/085Intermediate station arrangements, e.g. for branching, for tapping-off for ring networks, e.g. SDH/SONET rings, self-healing rings, meashed SDH/SONET networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/16Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605Fixed allocated frame structures
    • H04J3/1652Optical Transport Network [OTN]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J2203/00Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0057Operations, administration and maintenance [OAM]
    • H04J2203/006Fault tolerance and recovery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0079Operation or maintenance aspects
    • H04Q2011/0081Fault tolerance; Redundancy; Recovery; Reconfigurability
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/009Topology aspects
    • H04Q2011/0092Ring

Definitions

  • the present invention relates to a ring network protection technology in an OTN (Optical Transport Network), and more particularly to a method and apparatus for processing a multi-span working channel failure in a ring OTN.
  • OTN Optical Transport Network
  • OTN is a transmission network that organizes networks in the optical layer based on wavelength division multiplexing technology and is the next generation backbone transmission network. For 0TN, because the rate of transmitted signals is higher, the amount of information carried is larger, and the wavelength/sub-wavelength service scheduling capability is provided, the network protection of OTN becomes more important for traditional optical network protection, and the protection capability is also More powerful.
  • ODUk Optical Data Unit
  • end-to-end subnet link protection is usually provided.
  • the protection methods commonly used in the industry include 1+1 protection, l:n protection, and channel sharing protection.
  • trade-offs are often made based on bandwidth utilization, protection robustness, and switching time.
  • 1+1 protection provides a dedicated alternate channel for each subnet link, transmitting the same signal in both the working channel and the protection channel. Therefore, this protection method is the strongest and the switching time is the shortest. However, the bandwidth utilization rate is only 50%. When the network alarm rate is low, the bandwidth is wasted.
  • Channel sharing protection is a protection method that is applied to the ring network and shared resources by all services. Therefore, its bandwidth utilization is much higher than the 1+1 protection method. Because of the separation of working resources and protection resources, their robustness is also higher than l:n protection. However, as the nodes in the ring gradually increase, their stability decreases. In particular, when multiple ODUk alarms occur, services may be disconnected. Even if there is no misconnection, for multiple ODUk alarms, the shared resources shared by the channel can only be switched for one service, and multiple faulty services cannot be protected at the same time. .
  • Figure 1 is a schematic diagram of service protection by using the channel shared protection mode when a single ODUk alarm occurs on the ring network.
  • FIG. 2 shows the service protection of the channel sharing protection mode when multiple ODUk alarms occur on the ring network.
  • the channel sharing protection cannot simultaneously switch more than two services to the shared protection channel. At this time, the protection is invalid.
  • the invention provides a method and a device for processing a multi-span working channel fault in a ring OTN, which solves the problem that the channel sharing protection fails when multiple ODUk alarms in the ring network occur at the same time in the prior art.
  • the present invention provides a method for processing a multi-span working channel failure in a ring OTN, including the steps:
  • the method further includes: filtering the alarm when detecting that only the protection ODUk alarm is generated in the ring network.
  • the node of the span in which the ODUk alarm is located is in the 1+1 switching state.
  • the node of the optical multiplex section layer alarm or the protection ODUk alarm is in the A-direction switching state or the B-direction switching state, and the node through which the protection channel passes is in the through state.
  • the method further includes: when detecting that the ODUk alarm disappears, determining whether the corresponding protection ODUk is in a non-fault state, and if yes, performing a 1+1 protection protocol reply process on the service carried on the protection channel, Each node on the protection channel reverts to the idle state. Otherwise, the reply process of the channel sharing protection protocol is triggered, and each node on the protection channel replies to the idle state. Status.
  • the method further includes: when detecting that the optical multiplex section layer alarm disappears, triggering a reply flow of the channel sharing protection protocol, and each node on the protection channel returns to an idle state.
  • the method further includes: updating, when the protection ODUk alarm disappears, only the status of the protection group.
  • the present invention also provides a device for processing a multi-span working channel fault in a ring OTN, including an alarm detecting module and a switching triggering module, wherein
  • the alarm detection module is configured to detect the alarm information in the ring optical transmission network in real time and send it to the switching trigger module;
  • the switching triggering module is configured to perform a switching process of the 1+1 protection protocol on the service carried on the working channel that generates the alarm when the alarm detecting module detects that only the working ODUk alarm is generated in the ring network;
  • the alarm detection module detects that the protection ODUk corresponding to the ODUk that has generated the alarm in the ring network also generates an alarm, or an optical multiplex section is generated in the ring network.
  • the switching process of the channel sharing protection protocol is triggered.
  • the device further includes:
  • the alarm disappearance detecting module is configured to detect the alarm disappearing information in the ring optical transport network in real time and send it to the switching trigger module.
  • the switching trigger module is further configured to:
  • the alarm disappearance detection module detects that the working ODUk alarm disappears, it is determined whether the corresponding protection ODUk is in a non-fault state at this time. If yes, the reply process of the 1+1 protection protocol is performed on the service carried on the protection channel respectively, otherwise, the trigger channel is triggered. The process of replying to the shared protection agreement;
  • the switching triggering module is further configured to trigger a reply process of the channel sharing protection protocol.
  • the technical solution of the present invention can solve the problem that the channel sharing protection fails when multiple ODUk alarms in the ring network occur at the same time in the prior art without increasing the link resources.
  • the ODUk service performs 1+1 protection at the same time, and provides channel separation protection for link separation under the condition that the protection resources are invalid, thereby greatly enhancing the robustness of the protection in the ring topology.
  • Figure 1 is a schematic diagram of service protection by using channel shared protection mode when a single ODUk alarm occurs on the ring network;
  • Figure 2 is a schematic diagram of the service protection that cannot be used by the channel sharing protection mode when multiple ODUk alarms occur on the ring network;
  • FIG. 3 is a schematic diagram of configuring the working ODUk and the protection ODUk in the same optical channel;
  • FIG. 4 is a schematic diagram of configuring the working ODUk and the protection ODUk in different optical channels;
  • FIG. 5 is an alarm generated when the ring OTN is detected in the present invention.
  • FIG. 6 is a flowchart of a processing method when an alarm in a ring OTN is lost in the present invention;
  • FIG. 7 is a structural block diagram of an apparatus for processing an alarm in a ring OTN according to the present invention;
  • FIG. 8 is a schematic diagram of a fault in a working channel of a service segment in which the service 1 is located according to the embodiment of the present invention
  • FIG. 9 is a schematic diagram of a fault in a working channel of a service segment in which the service 1 and the service 2 are located in the embodiment of the present invention
  • FIG. 10 is a schematic diagram of a span failure occurring in a span of service 2 according to an embodiment of the present invention.
  • the ODUk signal can be crossed into any wavelength channel in any direction.
  • the working ODUk can be separated from the protected ODUk and configured in different optical channels, as shown in Figure 4.
  • the invention utilizes the crossover capability of any wavelength of the ODUk in any direction.
  • the four node states are in an idle state, the A-direction switching state, the B-direction switching state, and the through-state state, and the fifth is extended.
  • the state of the node is one-to-one 1+1 switching state.
  • the protection channel resource base that is reversed from the service on the ring based on the channel sharing protection protocol
  • the use of the 1+1 protection protocol for the protection channel resources in the same direction as the service is added.
  • the core idea of the present invention is: When only the working ODUk alarm is detected, the 1+1 protection of the same direction as the service is triggered, and the shared protection resource in the opposite direction is not switched. In this way, multiple alarms on a certain direction ring can be respectively protected with 1+1 protection, so that protection resource conflicts are not caused.
  • the protection ODUk also detects an alarm or detects an OMS layer alarm, the 1+1 protection is invalid.
  • the channel sharing protection needs to be triggered to occupy the shared protection resources of the reverse direction ring.
  • FIG. 5 is a flowchart of a processing method when an alarm is generated in a ring OTN according to the present invention, which mainly includes the following steps:
  • Step S301 Detecting alarm information in the ring optical transport network in real time
  • Step S302 Determine the type of the detected alarm information.
  • step S303 is performed, and only one or more protections are generated in the ring network.
  • step S304 is performed.
  • step S305 is performed.
  • Step S303 Perform a 1+1 protection protocol switching process on the service carried on the working channel that generates the alarm, and the upper and lower nodes of the span in which the ODUk alarm is located are in the 1+1 switching state, and the process goes to step S306.
  • Step S304 Filter the alarm, and go to step S308.
  • Step S305 The switching process of the triggering channel sharing protection protocol is performed.
  • the node in the span of the OMS alarm is in the A-direction switching state or the B-direction switching state, and the node through which the protection channel passes is in the through state, and the process goes to step S308.
  • Step S306 If an ODMk alarm is generated in the ring network, and an OMS alarm is generated in the ring network, or the protection ODUk corresponding to the ODUk that has generated the alarm also generates an alarm, perform The next step.
  • Step S307 The switching process of the triggering channel sharing protection protocol, the OMS alarm or the protection node of the ODUk alarm is in the A-direction switching state or the B-direction switching state, and the node through which the protection channel passes is in the through state, and the process goes to step S308.
  • Step S308 the process ends.
  • FIG. 6, is a processing party when the alarm in the ring OTN is detected disappears in the present invention.
  • the method flow chart mainly includes the following steps:
  • Step S401 Real-time detection of alarm disappearance information in the ring optical transport network
  • Step S402 determining the type of the detected alarm disappearance information, when detecting the working ODUk alarm disappearing information, performing step S403, and when detecting the protection ODUk alarm disappearing information, performing step S406, when detecting the OMS alarm disappearing information, Step S407 is performed.
  • Step S403 determining whether the corresponding protection ODUk is in a no-fault state at this time, if yes, executing step S404, otherwise, executing step S405.
  • Step S404 Perform a reply process of the 1+1 protection protocol for the service carried on the protection channel (Revert process, release protection, and resume the process to the working resource), and each node on the protection channel returns to the idle state, and the process goes to step S408.
  • Step S405 The reply channel sharing protection protocol is returned, and each node on the protection channel returns to the idle state, and the process goes to step S408.
  • Step S406 Update only the status of the protection group, and go to step S408.
  • Step S407 The reply channel sharing protection protocol is returned, and each node on the protection channel returns to the idle state, and the process goes to step S408.
  • Step S408 the process ends.
  • the present invention further provides an alarm processing device in a ring OTN.
  • FIG. 7 the figure is a structural block diagram of an apparatus for processing an alarm in a ring OTN according to the present invention, which mainly includes alarm detection.
  • the alarm disappearance detecting module is configured to detect the alarm message information in the ring optical transport network in real time and send it to the switching trigger module.
  • the switching triggering module performs the switching process of the 1+1 protection protocol on the service carried on the working channel that generates the alarm when the alarm detection module detects that only the working ODUk alarm is generated in the ring network; In the case of an ODUk alarm, if the alarm detection module detects that an OMS alarm is generated in the ring network, or the protection ODUk corresponding to the ODUk that has generated the alarm also generates an alarm, it is used to trigger the channel sharing protection protocol. Switching process. When the alarm disappearance detecting module detects that the working ODUk alarm is lost, the switching triggering module is further configured to determine whether the corresponding protection ODUk is in a faultless state, and if so, perform a 1+1 protection protocol on the service carried on the protection channel respectively. The reply process, otherwise, triggers the reply process of the channel sharing protection protocol; when the alarm disappearance detecting module detects that the OMS alarm disappears, the switching trigger module is also used to trigger the reply process of the channel sharing protection protocol.
  • the method and the device of the present invention can simultaneously perform 1+1 protection on multiple ODUk services without increasing link resources, and provide channel separation protection for link separation under the condition that protection resources are invalid, thereby greatly Enhances the robustness of protection in the ring topology.
  • the node AF forms a ring network topology, and there is a pair of services between the node B and the node C, which is recorded as the service 1, and a service exists between the nodes C and D, which is recorded as the service 2,
  • the following operations are performed:
  • Step S601 After detecting the alarm, the node C enters the alarm analysis process, and determines that only the working channel has a fault. Therefore, the 1+1 protection mechanism is sent, and the protection protocol is sent to the peer node B, and the node performs 1+1 switching.
  • Step S602 Node B receives the protection protocol of node C, triggers a 1+1 switching state, and sends a response protocol to node C.
  • Step S603 the node C receives the response protocol, and the system is in a steady state.
  • Step S604 After detecting the alarm, the node D enters the alarm analysis process, and determines that only the working channel has a fault. Therefore, the 1+1 protection mechanism is sent, and the protection protocol is sent to the peer node C, and the node performs 1+1 switching.
  • Step S605 Node C receives the protection protocol of node D, triggers a 1+1 switching state, and sends a response protocol.
  • Step S606 the node D receives the response protocol, and the system is in a steady state.
  • Step S607 Node D detects the OMS alarm, enters the alarm analysis process, triggers the channel sharing protection mechanism, and sends the protection protocol to the topology. Other nodes within.
  • Step S608 After the channel sharing protocol in the system is stable, the node C is in the B-direction switching state, the node D is in the A-direction switching state, and the node A, the node B, the node E, and the node F are respectively in a through state.
  • the present invention can effectively deal with the problem that the protection protection fails when two or more working channels have both faults in the channel sharing protection, and improves the network survivability without increasing network resources.
  • the technical solution of the present invention can solve the problem that the channel sharing protection fails when multiple ODUk alarms in the ring network occur at the same time in the prior art without increasing the link resources.
  • Multiple ODUk services are simultaneously protected by 1+1, and the channel sharing protection of the link separation is provided under the condition that the protection resources are invalid, thereby greatly enhancing the robustness of the protection in the ring topology.

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Description

环形光传送网中处理多跨段工作通道故障的方法及装置
技术领域
本发明涉及 OTN ( Optical Transport Network, 光传送网) 中的环网保护 技术, 尤其涉及一种环形 OTN中处理多跨段工作通道故障的方法及装置。
背景技术
OTN是以波分复用技术为基础、 在光层组织网络的传送网, 是下一代的 骨干传送网。对于 0TN来说, 由于所传送信号的速率更高,信息载送量更大, 并且提供波长 /子波长业务调度能力, 因此 OTN的网络保护对于传统光网络 保护变得更为重要, 保护能力也更为强大。
在 OTN中对于 ODUk ( Optical Data Unit, 光通道数据单元)层, 通常要 提供端到端的子网链接保护。在目前, 业界通常釆用的保护方法有 1+1保护, l :n保护以及通道共享保护等。在选择保护方案时,常常会根据带宽的利用率, 保护健壮性和倒换时间做出取舍。
1+1 保护可以为每一子网链接提供专用的备用通道, 在工作通道和保护 通道中传送相同的信号。 因此这种保护方法强壮性最强, 倒换时间最短。 但 带宽利用率仅为 50%, 在网络告警率艮低的情况下, 其带宽浪费严重。
通道共享保护是一种应用在环形网中的, 由所有业务共享备用资源的保 护方法, 因此其带宽利用率远高于 1+1保护方法。 由于工作资源与保护资源 分离, 其强壮性也高于 l :n保护。 但当环中节点逐渐增加时, 其稳定性随之 下降。 尤其是当发生多处 ODUk告警时, 会出现业务错连现象; 即使没有发 生错连, 对于多处 ODUk告警, 通道共享的备用资源只能供一条业务进行倒 换, 无法同时保护多个故障的业务。 图 1为环网出现单个 ODUk告警时釆用 通道共享保护方式进行业务保护的示意图, 由图中可见, 当检测到 OCH (光 通道, Optical Channel )层的告警时, 将触发业务在两端进行倒换, 同为顺时 针(逆时针) 的业务共享同一条反方向逆时针(顺时针)环通道。 图 2为环 网出现多处 ODUk告警时无法釆用通道共享保护方式进行业务保护的示意 图, 由图中可见, 如果在某一方向——例如顺时针环上检测到两个或两个以 上的 ODUk告警, 通道共享保护无法将两个以上的业务同时倒换到共享的保 护通道上, 这时保护失效。
发明内容
本发明提供一种环形 OTN中处理多跨段工作通道故障的方法及装置,用 以解决现有技术中当环网中多处 ODUk告警同时发生时, 通道共享保护失效 的问题。
本发明提供了一种环形 OTN中处理多跨段工作通道故障的方法,包括步 骤:
实时检测环形光传送网中的告警信息, 在检测到环网中只产生了工作 ODUk告警时, 分别对产生告警的工作通道上承载的业务执行 1+1保护协议 的倒换流程;
在环网中已存在一处工作 ODUk告警的情况下, 又检测到环网中已产生 告警的工作 ODUk对应的保护 ODUk也产生了告警时, 或者环网中产生了光 复用段层告警时, 触发通道共享保护协议的倒换流程。
进一步地, 上述方法还包括: 在检测到环网中只产生了保护 ODUk告警 时, 过滤该告警。
进一步地, 所述对产生告警的工作通道上承载的业务执行 1+1保护协议 的倒换流程的步骤后, 各工作 ODUk告警所在跨段的上下路节点处于 1+1倒 换状态。
进一步地, 触发通道共享保护协议的倒换流程的步骤后, 光复用段层告 警或保护 ODUk告警所在跨段的上下路节点处于 A向倒换状态或 B向倒换状 态, 保护通道通过的节点处于直通状态。
进一步地, 上述方法还包括: 在检测到工作 ODUk告警消失时, 判断此 时相应的保护 ODUk是否处于无故障状态, 若是, 分别对保护通道上承载的 业务执行 1+1保护协议的回复流程, 保护通道上的各节点回复到空闲状态, 否则, 触发通道共享保护协议的回复流程, 保护通道上的各节点回复到空闲 状态。
进一步地, 上述方法还包括: 在检测到光复用段层告警消失时, 触发通 道共享保护协议的回复流程, 保护通道上的各节点回复到空闲状态。
进一步地, 上述方法还包括: 在检测到保护 ODUk告警消失时, 仅对保 护组的状态进行更新。
本发明还提供了一种环形 OTN中处理多跨段工作通道故障的装置,包括 告警检测模块和倒换触发模块, 其中,
告警检测模块设置成实时检测环形光传送网中的告警信息, 将其发送给 倒换触发模块;
倒换触发模块设置成在告警检测模块检测到环网中只产生了工作 ODUk 告警时, 分别对产生告警的工作通道上承载的业务执行 1+1保护协议的倒换 流程; 以及
在环网中已存在一处工作 ODUk告警的情况下, 若告警检测模块又检测 到环网中已产生告警的工作 ODUk对应的保护 ODUk也产生了告警时, 或者 环网中产生了光复用段层告警时, 触发通道共享保护协议的倒换流程。
进一步地, 所述装置还包括:
告警消失检测模块,其设置成实时检测环形光传送网中的告警消失信息, 将其发送给倒换触发模块。
进一步地, 所述倒换触发模块还设置成:
在告警消失检测模块检测到工作 ODUk告警消失时, 判断此时相应的保 护 ODUk是否处于无故障状态,若是,分别对保护通道上承载的业务执行 1+1 保护协议的回复流程, 否则, 触发通道共享保护协议的回复流程; 以及
在告警消失检测模块检测到光复用段层告警消失时, 所述倒换触发模块 还用于触发通道共享保护协议的回复流程。
本发明有益效果如下:
本发明所述技术方案可以在不增加链路资源的条件下, 解决现有技术中 当环网中多处 ODUk告警同时发生时, 通道共享保护失效的问题, 能够对多条 ODUk业务同时进行 1+1保护, 并在保护资源失效的条件下, 提供链路分离的 通道共享保护, 从而大大增强了环网拓朴中保护的健壮性。
附图概述
图 1为环网出现单个 ODUk告警时釆用通道共享保护方式进行业务保护 的示意图;
图 2为环网出现多处 ODUk告警时无法釆用通道共享保护方式进行业务 保护的示意图;
图 3为将工作 ODUk与保护 ODUk配置在同一光通道中的示意图; 图 4为将工作 ODUk与保护 ODUk配置在不同光通道中的示意图; 图 5为本发明中当检测到环形 OTN中产生告警时的处理方法流程图; 图 6为本发明中当检测到环形 OTN中告警消失时的处理方法流程图; 图 7为本发明所述处理环形 OTN中告警的装置的结构框图;
图 8为本发明实施例中业务 1所在跨段的工作通道出现故障的示意图; 图 9为本发明实施例中业务 1和业务 2所在跨段的工作通道同时出现故 障的示意图;
图 10为本发明实施例中业务 2所在跨段出现跨段故障的示意图。
本发明的较佳实施方式
下面将结合附图对本发明的具体实现过程予以详细的说明。
在 OTN网络中, 基于 ODUk强大的交叉能力, 可以将 ODUk信号交叉 到任意方向的任意波长通道中。 既可以配置成工作 ODUk与保护 ODUk共用 一个光通道, 如图 3所示, 又可以将工作 ODUk与保护 ODUk分离, 配置在 不同的光通道中, 如图 4所示。 本发明利用了 ODUk的任意方向任意波长的 交叉能力, 在环网通道共享保护中四种节点状态一一空闲状态, A向倒换状 态, B 向倒换状态, 直通状态的基础上, 扩展了第五种节点状态一一 1+1 倒 换状态。 在基于通道共享保护协议利用环上与业务反向的保护通道资源基础 上, 增加了 1+1保护协议对环上与业务同向的保护通道资源的利用。
本发明的核心思想是: 在只检测到工作 ODUk告警时, 触发与业务同向 同宿的 1+1保护, 而不倒换到反方向的共享保护资源上。 这样对于某一方向 环上的多个告警可以分别相应其 1+1保护, 从而不会造成保护资源冲突。 当 保护 ODUk也检测到告警, 或者检测到 OMS层告警时, 这时 1+1保护已经 失效, 需要触发通道共享保护, 占用反方向环的共享保护资源。
请参阅图 5, 该图为本发明中当检测到环形 OTN中产生告警时的处理方 法流程图, 其主要包括如下步骤:
步骤 S301、 实时检测环形光传送网中的告警信息;
步骤 S302、 判断检测到的告警信息的类型, 当检测到环网中只产生了一 处或多处工作 ODUk告警时, 执行步骤 S303 , 当检测到环网中只产生了一处 或多处保护 ODUk告警时, 执行步骤 S304, 当检测到环网中只产生了一处 OMS告警时, 执行步骤 S305。
步骤 S303、 分别对产生告警的工作通道上承载的业务执行 1+1保护协议 的倒换流程, 各工作 ODUk告警所在跨段的上下路节点处于 1+1倒换状态, 转步骤 S306。
步骤 S304、 过滤该告警, 转步骤 S308。
步骤 S305、 触发通道共享保护协议的倒换流程, OMS告警所在跨段的 上下路节点处于 A向倒换状态或 B向倒换状态, 保护通道通过的节点处于直 通状态, 转步骤 S308。
步骤 S306、 在环网中已存在一处工作 ODUk告警的情况下, 又检测到环 网中产生了一处 OMS 告警, 或者与已产生告警的工作 ODUk对应的保护 ODUk也产生了告警时, 执行下一步骤。
步骤 S307、触发通道共享保护协议的倒换流程, OMS告警或保护 ODUk 告警所在跨段的上下路节点处于 A向倒换状态或 B向倒换状态, 保护通道通 过的节点处于直通状态, 转步骤 S308。
步骤 S308、 流程结束。
请参阅图 6, 该图为本发明中当检测到环形 OTN中告警消失时的处理方 法流程图, 其主要包括如下步骤:
步骤 S401、 实时检测环形光传送网中的告警消失信息;
步骤 S402、 判断检测到的告警消失信息的类型, 当检测到工作 ODUk告 警消失信息时, 执行步骤 S403 , 在检测到保护 ODUk告警消失信息时, 执行 步骤 S406, 在检测到 OMS告警消失信息时, 执行步骤 S407。
步骤 S403、 判断此时相应的保护 ODUk是否处于无故障状态, 若是, 执 行步骤 S404, 否则, 执行步骤 S405。
步骤 S404、分别对保护通道上承载的业务执行 1+1保护协议的回复流程 ( Revert 流程, 释放保护, 恢复到工作资源的流程) , 保护通道上的各节点 回复到空闲状态, 转步骤 S408。
步骤 S405、 触发通道共享保护协议的回复流程, 保护通道上的各节点回 复到空闲状态, 转步骤 S408。
步骤 S406、 仅对保护组的状态进行更新, 转步骤 S408。
步骤 S407、 触发通道共享保护协议的回复流程, 保护通道上的各节点回 复到空闲状态, 转步骤 S408。
步骤 S408、 流程结束。
相应于本发明上述方法,本发明进而提供了一种环形 OTN中的告警处理 装置, 请参阅图 7 , 该图为本发明所述处理环形 OTN中告警的装置的结构框 图, 其主要包括告警检测模块、 告警消失检测模块和倒换触发模块, 其中, 告警检测模块, 用于实时检测环形光传送网中的告警信息, 将其发送给 倒换触发模块。
告警消失检测模块, 用于实时检测环形光传送网中的告警消息信息, 将 其发送给倒换触发模块。
倒换触发模块, 在告警检测模块检测到环网中只产生了工作 ODUk告警 时, 用于分别对产生告警的工作通道上承载的业务执行 1+1保护协议的倒换 流程; 在环网中已存在一处工作 ODUk告警的情况下, 若告警检测模块又检 测到环网中产生了 OMS告警, 或者与已产生告警的工作 ODUk对应的保护 ODUk也产生了告警时, 用于触发通道共享保护协议的倒换流程。 在告警消失检测模块检测到工作 ODUk告警消失时, 所述倒换触发模块 还用于判断此时相应的保护 ODUk是否处于无故障状态, 若是, 分别对保护 通道上承载的业务执行 1+1保护协议的回复流程, 否则, 触发通道共享保护 协议的回复流程;在告警消失检测模块检测到 OMS告警消失时,所述倒换触 发模块还用于触发通道共享保护协议的回复流程。
本发明所述方法及装置可以在不增加链路资源的条件下,对多条 ODUk业 务同时进行 1+1保护, 并在保护资源失效的条件下, 提供链路分离的通道共 享保护, 从而大大增强了环网拓朴中保护的健壮性。
下面通过一具体实施例对本发明予以进一步详细的阐述。
请参阅图 8-10, 其中, 节点 A-F组成环网拓朴, 在节点 B与节点 C之间 存在一对业务, 记作业务 1 , 节点 C与 D之间存在一条业务, 记作业务 2, 釆用本发明所述告警处理方法, 当业务 1所在跨段的工作通道出现故障时, 如图 8所示, 进行如下操作:
步骤 S601、 节点 C检测到告警后, 进入告警分析流程, 判断只有工作通 道存在故障, 因此进行 1+1保护机制, 将保护协议发送给对端节点 B, 本节 点执行 1+1倒换。
步骤 S602、 节点 B接收到节点 C的保护协议, 触发 1+1倒换状态, 并向 节点 C发送响应协议。
步骤 S603、 节点 C接收到响应协议, ***处于稳态。
在***稳定后, 业务 2所在跨段的工作通道出现故障, 如图 9所示, 进 行如下操作:
步骤 S604、 节点 D检测到告警后, 进入告警分析流程, 判断只有工作通 道存在故障, 因此进行 1+1保护机制, 将保护协议发送给对端节点 C, 本节 点执行 1+1倒换。
步骤 S605、 节点 C接收到节点 D的保护协议, 触发 1+1倒换状态, 并 发送响应协议。
步骤 S606、 节点 D接收到响应协议, ***处于稳态。
在业务 1所在跨段故障消失后, 节点 B恢复空闲状态, 这时业务 2所在 跨段出现跨段故障, 上报产生 OMS告警, 如图 10所示, 进行如下操作: 步骤 S607、 节点 D检测到 OMS告警, 进入告警分析流程, 触发通道共 享保护机制, 将保护协议发送给拓朴内其他节点。
步骤 S608、 在***内通道共享协议稳定后, 节点 C处于 B向倒换状态, 节点 D处于 A向倒换状态, 节点 A, 节点 B , 节点 E, 节点 F分别处于直通 状态。
根据以上实施例可知, 本发明能够有效处理通道共享保护中, 两个以上 工作通道同时存在故障时保护失效的问题, 在不增加网络资源的条件下, 提 高了网络生存性。
发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。
工业实用性
与现有技术相比,本发明所述技术方案可以在不增加链路资源的条件下, 解决现有技术中当环网中多处 ODUk告警同时发生时,通道共享保护失效的问 题, 能够对多条 ODUk业务同时进行 1+1保护, 并在保护资源失效的条件下, 提供链路分离的通道共享保护, 从而大大增强了环网拓朴中保护的健壮性。

Claims

权 利 要 求 书
1、 一种环形光传送网中处理多跨段工作通道故障的方法, 其包括步骤: 实时检测环形光传送网中的告警信息, 在检测到环形光传送网中只产生 了工作光通道数据单元 ODUk告警时, 分别对产生告警的工作通道上承载的 业务执行 1+1保护协议的倒换流程;
在环形光传送网中已存在一处工作 ODUk告警的情况下, 又检测到已产 生告警的工作 ODUk对应的保护 ODUk也产生了告警时, 或者环形光传送网 中产生了光复用段层告警时, 触发通道共享保护协议的倒换流程。
2、 如权利要求 1所述的方法, 其还包括: 在检测到环形光传送网中只产 生了保护 ODUk告警时, 过滤所述保护 ODUk告警。
3、 如权利要求 1所述的方法, 其中, 对产生告警的工作通道上承载的业 务执行 1+1保护协议的倒换流程的所述步骤之后, 各工作 ODUk告警所在跨 段的上下路节点处于 1+1倒换状态。
4、 如权利要求 1所述的方法, 其中, 触发通道共享保护协议的倒换流程 的步骤之后, 光复用段层告警或保护 ODUk告警所在跨段的上下路节点处于 A向倒换状态或 B向倒换状态, 保护通道通过的节点处于直通状态。
5、如权利要求 1所述的方法, 其还包括: 在检测到工作 ODUk告警消失 时,判断此时告警消失的工作 ODUk相应的保护 ODUk是否处于无故障状态, 若是, 分别对保护通道上承载的业务执行 1+1保护协议的回复流程, 保护通 道上的各节点回复到空闲状态, 否则, 触发通道共享保护协议的回复流程, 保护通道上的各节点回复到空闲状态。
6、 如权利要求 1所述的方法, 其还包括: 在检测到光复用段层告警消失 时, 触发通道共享保护协议的回复流程, 保护通道上的各节点回复到空闲状 态。
7、如权利要求 1所述的方法, 其还包括: 在检测到保护 ODUk告警消失 时, 仅对保护组的状态进行更新。
8、一种环形光传送网中处理多跨段工作通道故障的装置, 所述装置包括 告警检测模块和倒换触发模块, 其中, 所述告警检测模块设置成实时检测环形光传送网中的告警信息, 将检测 到的告警信息发送给倒换触发模块;
所述倒换触发模块设置成:
在告警检测模块检测到环形光传送网中只产生了工作 ODUk告警时, 分 别对产生告警的工作通道上承载的业务执行 1+1保护协议的倒换流程; 以及 在环形光传送网中已存在一处工作 ODUk告警的情况下, 若告警检测模 块又检测到已产生告警的工作 ODUk对应的保护 ODUk也产生了告警时, 或 者环形光传送网中产生了光复用段层告警时, 触发通道共享保护协议的倒换 流程。
9、 如权利要求 8所述的装置, 其还包括:
告警消失检测模块,其设置成实时检测环形光传送网中的告警消失信息, 将检测到的告警消失信息发送给倒换触发模块。
10、 如权利要求 9所述的装置, 其中, 所述倒换触发模块还设置成: 在告警消失检测模块检测到工作 ODUk告警消失时, 判断此时告警消失 的工作 ODUk相应的保护 ODUk是否处于无故障状态, 若是, 分别对保护通 道上承载的业务执行 1+1保护协议的回复流程, 否则, 触发通道共享保护协 议的回复流程; 以及
在告警消失检测模块检测到光复用段层告警消失时, 触发通道共享保护 协议的回复流程。
PCT/CN2009/074146 2009-07-02 2009-09-23 环形光传送网中处理多跨段工作通道故障的方法及装置 WO2011000181A1 (zh)

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CN107800601B (zh) * 2016-09-06 2021-10-29 中兴通讯股份有限公司 环网倒换的保护方法、装置及***
CN109639549B (zh) * 2017-10-09 2021-11-05 中兴通讯股份有限公司 一种环网保护的实现方法和环网保护***
US10951654B2 (en) 2018-08-30 2021-03-16 At&T Intellectual Property 1, L.P. System and method for transmitting a data stream in a network
CN112532532B (zh) * 2020-11-16 2022-08-12 烽火通信科技股份有限公司 业务返回方法、装置、设备及可读存储介质
WO2024030135A1 (en) * 2022-08-05 2024-02-08 Altiostar Networks, Inc. System and method for traffic distribution with optical switch
CN116016139A (zh) * 2023-01-05 2023-04-25 中国联合网络通信集团有限公司 保护倒换方法和装置、电子设备、存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040111651A1 (en) * 2002-12-05 2004-06-10 Biswanath Mukherjee Method and apparatus for guaranteeing a failure-recovery time in a wavelength-division multiplexing network
CN1713548A (zh) * 2004-06-22 2005-12-28 中兴通讯股份有限公司 环形同步数字体系光传送网中光自动关断功能的实现方法
CN1808950A (zh) * 2005-01-19 2006-07-26 华为技术有限公司 一种复用段保护环带宽动态调整的方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7046619B2 (en) * 2000-11-07 2006-05-16 Ciena Corporation Method and system for bi-directional path switched network
US20040057724A1 (en) * 2001-01-04 2004-03-25 Markku Oksanen Maintaining quality of packet traffic in optical network when a failure of an optical link occurs
ITMI20010382A1 (it) * 2001-02-26 2002-08-26 Cit Alcatel Metodo per gestire la transizione tra un guasto tipo ring ed un guasto tipo span in reti per telecomunicazioni con topologia ad anello
US20030009599A1 (en) * 2001-05-04 2003-01-09 Appian Communications, Inc. Protecting ring network data
US7106968B2 (en) * 2001-07-06 2006-09-12 Optix Networks Inc. Combined SONET/SDH and OTN architecture
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
EP1411665A1 (en) * 2002-10-18 2004-04-21 Alcatel Method and apparatus for shared protection in an optical transport network ring based on the ODU management
US20040109408A1 (en) * 2002-12-06 2004-06-10 Packetlight Networks, Ltd. Fast protection for TDM and data services
IL163557A (en) * 2004-08-16 2010-05-31 Eci Telecom Ltd Method and system for hybrid protection in optical networks
CN1753342B (zh) * 2004-09-21 2010-12-08 华为技术有限公司 光网络中保护倒换的实现方法
JP4984797B2 (ja) 2006-09-29 2012-07-25 富士通株式会社 光ネットワークシステム
CN101145870B (zh) * 2007-07-31 2012-07-18 中兴通讯股份有限公司 一种光环形网络中业务无中断扩容的方法
CN101431371B (zh) * 2007-11-09 2011-12-21 华为技术有限公司 一种光网络设备信道保护倒换的方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040111651A1 (en) * 2002-12-05 2004-06-10 Biswanath Mukherjee Method and apparatus for guaranteeing a failure-recovery time in a wavelength-division multiplexing network
CN1713548A (zh) * 2004-06-22 2005-12-28 中兴通讯股份有限公司 环形同步数字体系光传送网中光自动关断功能的实现方法
CN1808950A (zh) * 2005-01-19 2006-07-26 华为技术有限公司 一种复用段保护环带宽动态调整的方法

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