WO2008000120A1 - Procédé et dispositif pour activer la protection d'un réseau optique dans une configuration à récepteur partagé - Google Patents

Procédé et dispositif pour activer la protection d'un réseau optique dans une configuration à récepteur partagé Download PDF

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Publication number
WO2008000120A1
WO2008000120A1 PCT/CN2006/003785 CN2006003785W WO2008000120A1 WO 2008000120 A1 WO2008000120 A1 WO 2008000120A1 CN 2006003785 W CN2006003785 W CN 2006003785W WO 2008000120 A1 WO2008000120 A1 WO 2008000120A1
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WO
WIPO (PCT)
Prior art keywords
channel
protection
switching
working channel
receiving device
Prior art date
Application number
PCT/CN2006/003785
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English (en)
Chinese (zh)
Inventor
Zhenyu Wang
Original Assignee
Zte Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Publication of WO2008000120A1 publication Critical patent/WO2008000120A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability

Definitions

  • the present invention relates to the field of optical communications, and in particular to an implementation technology for optical switching protection switching using Wavelength Division Multiplexing (WDM) technology.
  • WDM Wavelength Division Multiplexing
  • BACKGROUND In an application of current optical transmission network protection switching, there are two system configuration modes for a receiving device of a protected service signal: a receiving device redundancy configuration and a receiving device sharing configuration, as shown in FIG. 1 and FIG. 2 respectively. .
  • a service signal receiving device 101 is disposed on each of the working path and the protection path, and the quality of the service signal on the path in which the device is located can be detected, which is respectively APS (Automatic Protection Switching) of the system.
  • the controller 102 (used to implement the APS protocol algorithm processing function) provides a trigger signal for protection switching and recovery.
  • the service signals from the working path and the protection path are first selected by the protection executing device (corresponding to the protection selection switch 103 in the figure) to reach the receiving device 101, that is, the working path and
  • the protection path uses the same receiving device to detect the quality of the service signal on the current path, and provides a trigger signal for the protection switching and recovery of the system APS controller.
  • the protection executing device corresponding to the protection selection switch 103 in the figure
  • the protection path uses the same receiving device to detect the quality of the service signal on the current path, and provides a trigger signal for the protection switching and recovery of the system APS controller.
  • FIG. 1 since the working path and the protection path have independent signal detection capabilities, there is no problem of cooperative processing of the protection switching trigger criterion.
  • the technical problem to be solved by the present invention is to provide an optical network protection triggering method and apparatus in a shared configuration of a receiving device, which solves the problem that the prior art cannot effectively determine the recovery signal caused by the switching and the recovery signal caused by the work-through repair. Technical problems with incorrect operation of the system cannot be avoided.
  • the present invention provides an optical network protection triggering method in a receiving device sharing configuration, which is characterized in that a board is selected to connect a working channel or a protection channel to a service receiving device.
  • the automatic protection switching controller determines whether the working channel and the protection channel are faulty according to the detection result of the working channel light detecting point, the protection channel light detecting point, and the service signal detecting point of the receiving device, and controls the selection list.
  • the switch is switched as follows: mode 1, if the working channel is good, the switch remains in the working pass; mode 2, if the working channel is faulty, the protection channel is good, then the switch remains in the protection Channel 3: If the working channel fails and the protection channel fails, the switching remains in the working channel.
  • the above method is characterized in that the alarm information and the alarm disappearing information of the working channel light detecting point and the protection channel light detecting point are used to determine a transition of a good or fault state of the working channel and the protection channel, And confirming the state change by using the alarm information and the alarm disappearing information of the service signal detection point.
  • the above method is characterized in that, in the working channel is good, the switching is maintained under the initial condition of the working channel, and the second method further comprises the following steps: Step a1, if the service signal detection point detects a signal failure If the working channel is faulty, the receiving device sends a switching trigger message to the switching controller. Step bl, the switching controller sends a command packet to the selected board to perform a protection switching operation.
  • the protection channel is connected to the receiving device, and simultaneously starts a timer with a length of time T; Step cl, within the time T of the timer, if the switching controller receives the service receiving device If the alarm disappears, the protection channel is good, and the connection of the protection channel is maintained.
  • the above method is characterized in that, in the working channel, the switching is maintained under the initial condition of the working channel, and the third mode is further included in the step c1: If the switch controller does not receive the alarm disappear message reported by the service receiving device, it indicates that the protection channel also fails, and then performs a recovery operation to re-establish the connection of the working channel.
  • the method of the present invention is characterized in that, in the case that both the working channel and the protection channel fail, the switching is maintained under the initial condition of the working channel, the method 1 includes: if the switching controller receives the The alarm disappearing signal detected by the service signal detection point indicates that the state of the working channel is changed to be good, and the connection of the working channel is continued.
  • the above method is characterized in that, in the working channel and the protection channel, a fault occurs, and the switching is maintained under the initial condition of the working channel, and the second method includes: Step a2, the switching controller does not have On the premise that the alarm disappearing signal detected by the service signal detection point is received, if the switching controller receives the alarm disappearing message reported by the protection channel optical detection point, the state of the protection channel is changed to be good.
  • Step b2 the switching controller sends a command message to the selection board to perform a protection switching operation, and the protection channel is connected to the receiving device, and simultaneously starts a timer with a length of time T; Step c2 During the time T of the timer, if the switching controller receives the alarm disappearing message reported by the service receiving device, the protection channel is good, and the connection of the protection channel is maintained.
  • the above method is characterized in that, in the working channel and the protection channel, a fault occurs, and the switching is maintained under the initial condition of the working channel, and the third manner is further included in the step c2: During the time T of the device, if the switch controller does not receive the alarm disappear message reported by the service receiving device, it indicates that the protection channel is still faulty, and then performs a recovery operation to re-establish the connection of the working channel.
  • the above method is characterized in that, in the working channel failure, the protection channel is good, and the switching is maintained under the initial condition of the protection channel, and the third manner includes: if the switching controller receives the protection The alarm generated by the channel light detection point generates a message, and the switching controller sends a command message to the selected board to perform a switching recovery operation to restore the connection to the working channel.
  • the above method is characterized in that, in the working channel failure, the protection channel is good, and the switching is maintained under the initial condition of the protection channel, and the method 1 includes: Step a3, the receiving controller does not receive On the premise of the alarm generation message detected by the service signal detection point, if the switch controller receives the alarm disappear message of 4 ⁇ on the working channel light detection point, the state of the working channel is changed to The step b3, the switching controller sends a command message to the selection board to perform a protection recovery operation, and the working channel is connected to the receiving device, and simultaneously starts a timer with a length of T; Step 3 ⁇ 4 c3, in the time T of the timer, if the switching controller receives the alarm disappearing message reported by the service receiving device, it is confirmed that the working channel is good, and the connection of the working channel is maintained.
  • the above method is characterized in that, in the working channel failure, the protection channel is good, and the switching is maintained under the initial condition of the protection channel, and the second mode is further included in the step c3: In the time T, if the switching controller does not receive the alarm disappearing message reported by the service receiving device, the working channel is still faulty, and the switching controller controls the selected board to perform a switching operation, and switches to The protection channel maintains the connection of the protection channel.
  • the above method is characterized in that the length of the time T is greater than or equal to the sum of the maximum time required for the selected board to perform the switching and the maximum time required by the receiving device to detect the confirmation of the alarm disappearing.
  • the present invention further provides an optical network protection triggering device in a receiving device sharing configuration, which is characterized in that it comprises selecting a board, a service receiving device, and an automatic protection switching controller.
  • the selection board connects the working channel or the protection channel to the receiving device; the switching controller is configured to: according to the detection result of the working channel light detecting point, the protection channel light detecting point, and the service signal detecting point of the receiving device, Determining whether the working channel and the protection channel are faulty, and controlling the selection board to switch according to the following manner: if the working channel is good, the switching is maintained in the working channel; if the working channel is faulty, If the protection channel is good, the switch remains in the protection channel; if the working channel fails, the protection channel fails, and the switch remains in the working channel.
  • FIG. 1 is a schematic diagram of a redundant configuration of a receiving device
  • FIG. 2 is a schematic diagram of a shared configuration of a receiving device
  • FIG. 3 is a flowchart of a shared receiving and receiving trigger provided by the present invention
  • FIG. 1 Schematic diagram of the protection application.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific technical embodiments of the present invention will be described in detail below with reference to the drawings and application examples.
  • the present invention provides a corresponding solution for the system protection switching reliable triggering problem in the case of a shared receiving device configuration application
  • FIG. 3 is a shared receiving device triggering flowchart. As shown in the figure, the following mainly includes the following implementation steps:
  • the device shown in Fig. 2 can provide the following three detection points: a service signal detection point, a work channel light detection point, and a protection channel light detection point.
  • the OTU When the "service signal detection point" detects a signal failure, the OTU sends an APS trigger message to the APS controller through the communication control bus, and the APS controller sends a command message to the protection selection switch module through the communication control bus to perform the protection switching operation.
  • start a timer with a length of T and the time length setting of T should be not less than the sum of "maximum time T1 required for protection switch to perform switching” and "maximum time required for OTU detection to confirm alarm disappears T2".
  • the protection selection switch remains in the protection switching state; if the alarm is not received by the service receiving device, the alarm is cleared. If the message is that the protection path is faulty, the APS controller sends a command message to the protection selection switch to perform the operation of returning to the working path through the communication control bus. After the step 3), if the optical switch state is the working channel state (the alarm state of the corresponding service receiving device is always in the alarm generating state), proceed as follows:
  • the APS controller After the APS controller does not receive the alarm disappearance signal detected by the "service signal detection point", the APS controller receives the alarm disappear message reported by the "protection channel light detection point", then the APS controller The control protection selection switch performs a protection switching operation, and simultaneously starts a timer of a time length T (the length of the T is set as in the previous step 2). If the APS controller receives the alarm disappear message reported by the service receiving device, the protection selection switch maintains the protection switching state, and then the processing step continues to step 6); If the alarm disappearing message reported by the service receiving device is not received, the protection path is still faulty.
  • the APS controller sends a command message to the protection selection switch through the communication control bus to perform a recovery operation, returns to the working channel, and the processing step returns to step 4).
  • the optical switch state is maintained in the protection channel state (the alarm state corresponding to the working channel is in the alarm generation state), proceed as follows:
  • step 6 If the APS controller receives the alarm generation message on the “protection channel light detection point”, the APS controller sends a command message to the protection selection switch through the communication control bus to perform the switching recovery operation and restore to the working channel. The processing steps go to step 4).
  • the APS controller does not receive the alarm generation message on the "protection channel light detection point"
  • the APS controller receives the alarm disappear message reported by the "work channel light detection point”
  • the APS The controller sends a command message to the protection selection switch through the communication control bus to perform a protection recovery operation, and simultaneously starts a timer with a length of time ,, and the time length of the ⁇ is set as in the previous step 2), and the timer starts counting to the timing.
  • FIG. 4 is a schematic diagram of an application of point-to-point 1+1 protection in an optical transmission system, in which a service signal is split into two at a source node and transmitted to a destination node along a working channel and a protection channel, and the destination node passes light.
  • the board (the board) receives the service signals from the working channel and the protection channel.
  • the board itself provides optical power detection for the working channel and the protection channel.
  • the selected service signal is sent to the board.
  • the connected service receives the board OTU.
  • the OTU board can detect the loss of the signal (LOS), the loss of the frame (LOF), and the error-based (BER) of the service signal in real time and report it to the APS controller board.
  • the APS control board sends a switch switching operation to the APS (OP board) according to the protection protocol algorithm.
  • the OTU detects the LOS alarm generation message, and sends a message to the APS control board through the control bus.
  • T1 is the maximum time required for the OP board to perform the switching
  • T2 is the maximum time required for the OTU board to confirm that the alarm disappears.
  • the APS control board receives the OTU. Detecting the signal of the last 4 ⁇ returns to normal
  • the control OP maintains the protection switching state. After the fault of the position 1 is repaired, the optical power of the OP working channel detects that the optical power is restored to normal and is reported to the APS control board.
  • the APS control board controls the operation of the OP board to return to the working channel and starts the timer T (T).
  • the APS control board receives the OTU detection ⁇ : Gen normal message signals, and then maintained in the working path OP control state.
  • the OTU signal detection point detects the signal failure and reports the APS control board signal loss (LOS) alarm.
  • the APS control board controls the OP board to perform the operation of switching to the protection channel.
  • the APS control board receives the protection channel optical power alarm signal of the OP, and then controls the OP board to perform the recovery operation, and the OP resumes the working channel state.
  • the optical protection point of the OP protection channel detects that the optical power is restored to normal and is reported to the APS control board.
  • the APS control board controls the OP board to perform the operation of switching to the protection channel, and starts the timer T ( The value of T is 350ms.) In the T-timed time range, the APS control board receives the signal reported by the OTU detection and returns to the normal message, and then the control OP maintains the protection path state. When only the location 2 is faulty, the system APS control board only needs to mark the protection channel alarm status as "alarm generation”. The APS control board does not control the OP board to perform any operations, and the OP maintains the working channel status. After the location 2 fails, the system APS control board only needs to mark the protection channel alarm status as "alarm generation".
  • the APS control board receives the alarm signal of the protection channel optical power failure of the OP. After that, the OP board is controlled to perform the recovery operation, and the OP board is restored to the working channel state. After the location 2 fault is repaired, the optical protection point of the OP protection channel detects that the optical power is restored to normal and is reported to the APS control board.
  • the APS control board controls the OP board to perform the operation of switching to the protection channel, and starts the timer T ( The value of T is 350ms.) In the T-timed time range, the APS control board receives the signal from the OTU detection and returns to the normal message, and then the control OP maintains the protection path state.

Abstract

L'invention concerne un procédé et un dispositif d'activation de la protection d'un réseau optique dans une configuration à récepteur partagé. Ce procédé comprend les étapes suivantes: la carte optionnelle raccorde le chemin actif ou le chemin de protection au dispositif recevant un service, l'unité de commande de commutation automatique de protection détermine s'il existe une défaillance dans le chemin actif et dans le chemin de protection à partir du résultat d'une détection opérée par le point de détection du chemin actif, le point de détection du chemin de protection et le point de détection de service du dispositif recevant le service, et l'unité de commande de commutation automatique de protection commande la carte optionnelle afin que la commutation soit opérée comme suit: si aucune défaillance n'est présente sur le chemin actif, la sélection du chemin de actif est maintenue, et s'il existe une défaillance à la fois sur le chemin actif et sur le chemin de protection, la sélection du chemin actif est également maintenue. Ce procédé et ce dispositif permettent une détection efficace du signal de restauration produit lors de la commutation et le signal de restauration produi lors de la restauration du chemin actif pour éviter les erreurs de fonctionnement du système.
PCT/CN2006/003785 2006-06-20 2006-12-30 Procédé et dispositif pour activer la protection d'un réseau optique dans une configuration à récepteur partagé WO2008000120A1 (fr)

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CN200610089335A CN1874201B (zh) 2006-06-20 2006-06-20 在接收设备共享配置下的光网络保护触发方法及装置
CN200610089335.0 2006-06-20

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CN106533543A (zh) * 2016-11-22 2017-03-22 中国南方电网有限责任公司 一种低速率光信号保护装置及保护方法

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CN101383635B (zh) * 2007-09-06 2013-04-17 华为技术有限公司 一种板间通道保护方法及装置
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
CN101626272B (zh) * 2008-07-10 2013-03-20 中兴通讯股份有限公司 一种光网络中错连阻错的实现方法
CN101790110B (zh) * 2009-01-22 2012-12-19 中兴通讯股份有限公司 一种协调自动保护倒换操作与恢复操作的装置及方法
CN101883295B (zh) * 2009-05-06 2014-04-30 华为技术有限公司 业务传输处理方法、节点设备及网络系统
CN101577845B (zh) * 2009-06-01 2012-11-14 中兴通讯股份有限公司 一种倒换控制命令处理的方法及装置
CN101605282B (zh) * 2009-06-26 2012-07-04 中兴通讯股份有限公司 一种光网络保护系统、方法及装置
CN101848034B (zh) * 2010-05-05 2014-12-17 中兴通讯股份有限公司 一种光路保护装置和方法
CN101989927A (zh) * 2010-10-20 2011-03-23 华为技术有限公司 一种冗余倒换的处理方法、装置及设备
CN102761794B (zh) * 2012-07-09 2018-06-01 中兴通讯股份有限公司 光层通道1+1保护业务建立方法及装置
CN104025476B (zh) * 2012-12-04 2016-10-05 华为技术有限公司 光传送网络中控制保护倒换范围的处理方法和保护装置
CN103441793B (zh) * 2013-08-30 2017-01-25 上海斐讯数据通信技术有限公司 一种实现光链路可靠通信的方法
CN107479996B (zh) * 2017-07-11 2020-09-18 深圳市恒扬数据股份有限公司 一种光传输设备的关光保护电路及其关光保护方法
CN115694617A (zh) * 2021-07-28 2023-02-03 中兴通讯股份有限公司 保护倒换的方法和电子设备

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