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WO2024255578A1 - Procédé et appareil de protection de fibre optique de jonction, dispositif et support de stockage lisible - Google Patents

Procédé et appareil de protection de fibre optique de jonction, dispositif et support de stockage lisible Download PDF

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Publication number
WO2024255578A1
WO2024255578A1 PCT/CN2024/095499 CN2024095499W WO2024255578A1 WO 2024255578 A1 WO2024255578 A1 WO 2024255578A1 CN 2024095499 W CN2024095499 W CN 2024095499W WO 2024255578 A1 WO2024255578 A1 WO 2024255578A1
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Prior art keywords
pon
main
pon port
port
standby
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English (en)
Chinese (zh)
Inventor
余辰东
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ZTE Corp
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ZTE Corp
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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
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/038—Arrangements for fault recovery using bypasses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07955—Monitoring or measuring power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • 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
    • 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
    • H04Q2011/0083—Testing; Monitoring

Definitions

  • the present application relates to the field of optical communications, and in particular to a trunk optical fiber protection method, device, equipment and readable storage medium.
  • PON Passive Optical Network
  • P2MP point-to-multipoint
  • EPON Error Optical Network
  • G-PON Gigabit-capable Passive Optical Network
  • passive optical network devices have the same system architecture, including central office equipment OLT (Optical Line Terminal), ODN (optical distribution network) and user-side equipment ONU (Optical Network Unit).
  • OLT completes the aggregation of multiple ONUs through the PON port, forming a point (OLT) to multipoint (ONU) topology.
  • trunk fiber protection In a passive optical network, if the trunk fiber connecting the PON port of the OLT and the primary optical splitter in the ODN is interrupted, all ONU services under the trunk fiber will be interrupted. Therefore, the trunk fiber is usually protected by active-standby switching. However, in some scenarios, trunk fiber protection has problems such as invalid switching and frequent switching, which consumes a lot of system resources and reduces system performance, becoming one of the technical problems that need to be solved in the existing technology.
  • the purpose of the embodiments of the present application is to provide a trunk optical fiber protection method, device, equipment and readable storage medium, which can solve the problem of ineffective switching and frequent switching of trunk optical fibers and improve system performance.
  • a trunk optical fiber protection method comprising: establishing PON port status information based on a passive optical network (PON) protection group, wherein the PON protection group includes at least two PON ports, and the at least two PON ports are connected to at least one optical network unit (ONU) corresponding to the PON protection group through respective trunk optical fibers, and the PON port status information includes at least a main PON port status and a backup PON port status, the main PON port is a currently working PON port among the at least two PON ports, and the backup PON port is a currently non-working PON port among the at least two PON ports; when confirming that an ONU is online in at least one ONU corresponding to the PON protection group, based on detection of uplink optical signals of the main and backup PON ports, detecting and updating the status of the main and backup PON ports; and when the status of the main PON port is abnormal, controlling the execution of the main and backup switching of the trunk optical fiber based on the status of the PON
  • a trunk optical fiber protection device comprising: an establishment module, used to establish PON port status information based on a PON protection group, wherein the PON protection group includes at least two PON ports, and the at least two PON ports are connected to at least one ONU corresponding to the PON protection group through respective trunk optical fibers, and the PON port status information at least includes a main PON port status and a backup PON port status, the main PON port is a currently working PON port among the at least two PON ports, and the backup PON port is a currently non-working PON port among the at least two PON ports; a detection and update module, used to detect and update the status of the main and backup PON ports based on the detection of uplink optical signals of the main and backup PON ports when confirming that there is an ONU online in at least one ONU corresponding to the PON protection group; and a switching control module, used to control the execution of the main and backup switching of the trunk optical fiber based on the status of the
  • an electronic device comprising a processor and a memory, wherein the memory stores A program or instruction that can be run on the processor, wherein the program or instruction is executed by the processor to implement the method as described in the first aspect.
  • a readable storage medium is provided.
  • the program or instruction in the readable storage medium is executed by a processor of an electronic device, the electronic device can execute the method described in the first aspect.
  • FIG1 is a schematic diagram of an implementation environment of a trunk optical fiber protection method provided by an embodiment of the present application.
  • FIG2 is a schematic flow chart of a trunk optical fiber protection method provided by an embodiment of the present application.
  • FIG3 is a flow chart of a trunk optical fiber protection method based on enabling two primary and standby PON ports of an OLT according to an embodiment of the present application;
  • FIG4 is a schematic structural diagram of a trunk optical fiber protection device provided by an embodiment of the present application.
  • FIG5 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present application.
  • any communication system of a passive optical network adopting a P2MP topology structure in the access network is collectively referred to as an xPON system.
  • the adoption of a P2MP topology structure is a significant feature of the xPON system.
  • the xPON system may include a communication system that adopts a passive optical network or a networked structure similar to a P2MP topology structure.
  • a common xPON system networking structure is usually composed of EMS (network management server), OLT, ODN and several ONUs.
  • EMS network management server
  • OLT as a local end device, connects and aggregates multiple ONUs through ODN based on PON ports.
  • ONU realizes the access of user services, thereby realizing functions such as data services and configuration management.
  • the passive optical network multiple ONUs are accessed in units of PON ports, thereby realizing a P2MP topology structure, where "point” refers to the PON port of the central office device OLT, and “multipoint” refers to multiple ONUs connected to the PON port.
  • the number of ONUs connected to the PON port is 1 to 128.
  • the convergence of multiple ONU connections is generally realized by an optical splitter.
  • multi-level splitting is generally realized by cascading optical splitters.
  • the optical splitter directly connected to the PON port of the OLT is called a primary optical splitter, which is hereinafter referred to as a secondary optical splitter, a tertiary optical splitter, etc.
  • a primary optical splitter which is hereinafter referred to as a secondary optical splitter, a tertiary optical splitter, etc.
  • the optical link connecting the PON port of the OLT and the primary optical splitter in the ODN is called a trunk optical fiber/optical path, and other optical links are called branch optical fibers/optical paths.
  • the original first-level splitter can be changed from 1:N to 2:N, where 1 and 2 refer to the number of trunk fibers in the first-level splitter, that is, the trunk fiber becomes two, and the two fibers work in the master-slave mode.
  • the PON port connected to the trunk fiber is also set to two, and the two PON ports are mutually master-slave.
  • the currently working PON port of the two PON ports can be called the main PON port, and the currently non-working PON port can be called the backup PON port.
  • the trunk fiber connected to the main PON port can be called the main trunk fiber
  • the main trunk fiber connected to the backup PON port can be called the main trunk fiber
  • the trunk fiber can be called the backup trunk fiber.
  • the ONU is connected to the main PON port of the OLT through the main trunk fiber.
  • the main trunk fiber is abnormal, that is, when the OLT detects that the main trunk fiber has a PON LOS
  • the OLT controls the ONU service to switch to the backup trunk fiber
  • the ONU is connected to the backup PON port of the OLT through the backup trunk fiber.
  • the above protection mechanism is called trunk fiber protection, which can also be called PON trunk protection or PON TYPEB protection.
  • Trunk fiber protection is currently the main optical link protection method under the PON port, which is based on the PON LOS detection of the main and backup PON ports to protect the ONU service.
  • PON LOS usually means that when the PON port does not detect a valid upstream optical signal for 4 consecutive frames, it is considered that the PON port has generated a PON LOS.
  • the xPON system will initiate a trunk optical fiber master-slave switch based on the PON LOS.
  • the business scenarios that cause the central office equipment OLT to detect the PON LOS can be distinguished based on the ONU status under the PON port, including but not limited to the following business scenario examples:
  • PON cell power outage (or power outage): that is, all ONUs under the PON port are powered off (generally a power outage in a centralized area), then the corresponding PON port side will detect a PON LOS alarm, but it has nothing to do with the trunk fiber failure.
  • Scenario 2 The last ONU under the PON port is powered off: When the last ONU under the PON port is powered off (DGi), the PON port side will detect a PON LOS alarm.
  • the PON port is configured with only one ONU and it is powered off (DGi); or, the PON port is configured with multiple ONUs, but only one ONU is online and it is powered off (DGi). In these two cases, the PON LOS alarm will be detected on the corresponding PON port side.
  • Scenario 4 The last ONU under the PON port is offline: When the last ONU under the PON port is offline (LOSi), the PON port side will detect a PON LOS alarm.
  • Scenario 5 Only one ONU is configured on the PON port and it is offline (LOSi); or, multiple ONUs are configured on the PON port but only one ONU is online and is offline (LOSi). In these two cases, the PON LOS alarm will be detected on the corresponding PON port side.
  • Scenario 6 All ONUs have never been online: The system is initially configured with offline ONUs. In this case, the PON port side will detect a PON LOS alarm.
  • Scenario 7 The trunk optical fiber is broken.
  • the cause of PON LOS in scenarios 1 to 3 is ONU power failure, and the cause of PON LOS in scenarios 4 to 5 may be trunk fiber breakage or branch fiber breakage; in scenario 6, it is impossible to determine whether the cause of PON LOS is trunk fiber breakage.
  • the ONU status involved includes:
  • the OLT detects that a single ONU has not detected a valid upstream optical signal for four consecutive frames.
  • ONU DGi The power-off alarm reported when the ONU is powered off through the discharge of its capacitor.
  • the above-mentioned backbone fiber protection (PON backbone protection or PON TYPE B protection) mechanism can protect the ONU services under the PON port based on PON LOS, that is, when the current working main PON port generates PON LOS, the ONU services can be switched to the backup PON port.
  • PON backbone protection or PON TYPE B protection PON backbone protection or PON TYPE B protection
  • Problem 1 Invalid switching: If the backup link in the PON protection group is abnormal, or the above scenarios 1 to 3 (ONU power failure), or the above scenarios 4 to 5 and the non-trunk fiber is broken, or the above scenario 6, the OLT initiates the main and backup switching of the trunk fiber, and the ONU service will not be restored on the backup PON port, which is an invalid switching.
  • the trunk fiber protection mechanism initiates active-standby switching based on PON LOS.
  • PON LOS occurs on both the primary and standby links, such as when both the primary and standby trunk fibers are broken in the above scenarios 1 to 3 and scenario 6, and when the branch fibers are broken in the above scenarios 4 to 5, frequent switching will occur.
  • the embodiment of the present application aims to provide a trunk optical fiber protection method, which is applicable to any xPON system of a passive optical network adopting a P2MP topology structure in an optical access network, and can realize automatic detection of trunk optical fiber protection reversal, thereby solving the problem of invalid switching and frequent switching of the trunk optical fiber, and improving system performance.
  • the embodiment of the present application firstly, it involves the detection and synchronization of the status of the main and backup PON ports, and further updates the status of the main and backup PON ports according to different business scenarios of PON LOS; secondly, it involves the control of the main and backup switching of the trunk optical fiber.
  • the main and backup switching is not performed. Further in this case, the detection and synchronization of the status of the backup PON port is controlled to accelerate the update of the status of the backup PON port.
  • the xPON system includes EMS 101 , OLT 102 , ODN 103 , and ONU 104 , wherein:
  • EMS101 is responsible for the configuration, management, and maintenance of OLT102 and its ONU104, and manages the historical information of OLT102 and ONU104 as well as related alarms and notification messages. It can also dynamically maintain the related network and remind manual intervention according to the alarms or notification messages related to the main fiber primary and standby switching reported by OLT102.
  • OLT102 implements ONU registration and maintenance based on PON ports.
  • at least two PON ports are enabled on the OLT.
  • the at least two PON ports can adopt a one-master-multiple-standby mode.
  • the currently working PON port is the main PON port
  • the currently non-working PON port is the standby PON port.
  • two main and standby PON ports can be enabled on the OLT, and the corresponding ONUs can be linked through a 2:N optical splitter.
  • the OLT can automatically switch the ONU to the standby link to keep the business normal.
  • Figure 1 only takes the example of enabling two main and standby PON ports on the OLT for schematic illustration. In specific implementation, more PON ports can be enabled on the OLT according to networking requirements.
  • ODN 103 is used to connect different numbers of ONUs 104 under OLT 102, and serves as a direct physical connection channel between OLT 102 and ONU 104. It may be composed of a plurality of physical devices, including but not limited to:
  • the trunk optical fiber/optical path (primary and backup) is used to connect the first-level splitter and the PON port corresponding to the OLT. Generally, a single PON port is used. When the trunk optical fiber protection mechanism is adopted, two primary and backup PON ports will be enabled, or even three or more PON ports will be enabled. When three or more PON ports are enabled, each PON port adopts the form of one primary and multiple backups.
  • Optical splitters are combined with one or more optical splitters to achieve the splitting ratio.
  • the maximum splitting ratio is 1:128 or 1:256. Since the optical splitter will introduce optical attenuation, the cascade of optical splitters generally does not exceed three levels.
  • the optical splitter directly connected to the OLT PON port is a primary optical splitter, and the other cascaded optical splitters are called secondary optical splitters or tertiary optical splitters (referred to as n-level optical splitters).
  • Branch optical fiber the optical path connecting the multi-stage splitters and the optical path directly connected to the ONU is called branch optical fiber.
  • ONU 104 is a terminal device for accessing home users, and is managed by OLT 102. During the registration process, it accepts the link identifier assigned by OLT 102 to complete ONU registration; and uploads data in the time slot window uniformly assigned by OLT 102 to complete service forwarding.
  • the trunk optical fiber protection detection method provided in the embodiment of the present application can be executed by the OLT in the xPON system or by software installed in the OLT, or can be executed by the network management server in the xPON system or by software installed in the network management server.
  • FIG. 2 is a schematic flow chart of a trunk optical fiber protection method provided by an embodiment of the present application.
  • the method may include:
  • the PON protection group is a logical aggregation concept, including at least two physical PON ports enabled on the same OLT. If there are two PON ports, one active and one standby can be used. If there are three or more PON ports, one active and multiple standby can be used. For the at least two PON ports included in the PON protection group, they can be distinguished by the names of active PON port and standby PON port. In general, the PON port with an ONU online is the currently working PON port (abbreviated as The PON protection group is a PON protection group that is connected to the main PON port. ...
  • the PON port status information includes at least the following field types: the main PON port status and the standby PON port status.
  • the PON port status information may also include at least one of the following field types: the PON protection group index, the currently working PON port identifier, and the switching indication information.
  • the PON protection group has an index value, and each PON port in the PON protection group corresponds to a unique identification value.
  • the field contents of the PON protection group index and the currently working PON port identifier can be set according to the actual index value and the identification value, while the field contents of the main PON port status, the standby PON port status, and the switching indication information are generally initialized to "empty", and subsequently based on the detection of the uplink optical signals of the main and standby PON ports, the corresponding PON port status is detected and updated, and the switching flag information is set.
  • the steps of detecting the upstream optical signal based on the main and backup PON ports and detecting and updating the status of the main and backup PON ports are performed.
  • the steps of detecting the upstream optical signal based on the main and backup PON ports and detecting and updating the status of the main and backup PON ports are not performed, thereby avoiding invalid switching and frequent switching caused by the scenario where the ONU has never been online.
  • the main PON port status is used to indicate whether the optical signal of the corresponding main PON port is normal, that is, whether the main PON port is available;
  • the standby PON port status is used to indicate the corresponding Whether the optical signal of the standby PON port is normal, that is, whether the standby PON port is available, it can be understood that in the case of multiple standby PON ports, each standby PON port corresponds to its own state.
  • the state of the corresponding PON port (including the main PON port and the standby PON port) can be detected, so as to set the PON port state to normal or abnormal.
  • the method for detecting the status of the main PON port is implemented by detecting the upstream optical signal of the main PON port, and specifically may include: detecting the upstream optical signal of the main PON port, and when the main PON port fails to detect a valid upstream optical signal for a set number of frames (for example, 4 frames) continuously, determining that the main PON port has generated PON LOS, and setting the status of the main PON port to abnormal; otherwise, setting the status of the main PON port to normal.
  • the method for detecting the status of the standby PON port is implemented by detecting the upstream optical signal of the standby PON port, and specifically may include: detecting the upstream optical signal of the standby PON port, and when the standby PON port detects a specific upstream optical signal, setting the status of the standby PON port to normal; otherwise, setting the status of the standby PON port to abnormal, and generating an alarm message of trunk optical fiber breakage of the standby PON port.
  • the specific upstream optical signal may be an SD (Signal Detect) signal, which may periodically detect whether an SD signal exists at the standby PON port according to a set first detection period (T1).
  • the first detection period is generally less than a set service recovery time threshold (SLArecover).
  • SLArecover is a set time threshold, which indicates the service recovery time required by the user and can be flexibly set according to user needs.
  • the SD signal is an indication signal sent by an ONU, indicating that the ONU can perform data transmission.
  • the specific upstream optical signal may also be the upstream optical power of the standby PON port, thereby realizing the detection of the status of the standby PON port.
  • the above method for detecting the state of a standby PON port is applicable to any standby PON port, and the state corresponding to each standby PON port can be obtained respectively through signal detection.
  • the field content of the switching indication information can be further set based on the standby PON port status.
  • the switching indication information is set to be switchable.
  • the switching indication information is set to be The switching indication information is non-switchable, so that the execution of the main optical fiber master-slave switching can be controlled based on the switching indication information, thereby improving the switching efficiency.
  • S203 may specifically include:
  • the PON port status information also includes switching indication information, accordingly, when the switching indication information is non-switchable, the main optical fiber master-slave switching is not initiated, and an alarm message of PON protection group abnormality is generated.
  • the switching indication information is switchable, the execution of the main optical fiber master-slave switching is controlled according to the business scenario information corresponding to the PON LOS generated by the main PON port.
  • the business scenario information may include the business scenario judgment time and the business scenario type.
  • one backup PON port if the status of the backup PON port is normal, and in the case of multiple backup PON ports, if there is at least one backup PON port in a normal status, it means that there is an available backup PON port, and the execution of the main optical fiber main-backup switching can be further controlled according to the business scenario information corresponding to the PON LOS generated by the main PON port. If the status of all backup PON ports is abnormal, it means that there is no available backup PON port, and the main optical fiber main-backup switching is not initiated, thereby avoiding invalid switching and frequent switching.
  • step S2031 after the alarm message of the abnormality of the PON protection group is generated, it is possible to further periodically detect whether there is a specific upstream optical signal at the standby PON port according to the set second detection period (T2), wherein the specific upstream optical signal may include an SD signal, and the second detection period T2 needs to be less than the first detection period T1; when the standby PON port detects the specific upstream optical signal, the state of the standby PON port is updated to be normal, and the switching indication information can also be synchronously updated to be switchable If there is a normal standby PON port at this time, step S2032 can be executed, that is, the execution of the main optical fiber main-standby switching is controlled according to the service scenario information corresponding to the PON LOS generated by the main PON port.
  • T2 the set second detection period
  • S2032a Determine the business scenario judgment time and business scenario type corresponding to the PON LOS generated by the main PON port, wherein the business scenario judgment time is used to indicate the time when the ONU comes back online.
  • the average time from when the ONU goes offline to when it comes back online can be statistically calculated as the business scenario judgment time.
  • the business scenario types corresponding to the PON LOS generated by the main PON port are divided into: ONU power failure (corresponding to scenarios 1 to 3), the last or only ONU offline (corresponding to scenarios 4 to 5), etc.
  • the execution of the main optical fiber master-slave switching can be controlled according to the service scenario type corresponding to the PON LOS generated by the main PON port, specifically:
  • the main optical fiber master-slave switchover is not initiated, and the update of the main and backup PON port status is suspended until the main PON port status returns to normal.
  • the main fiber active-standby switching is initiated, and the original standby PON port in normal state is switched to the currently working PON port, which becomes the new active PON port after the switch; and the state of the new active PON port after the switch is detected, and the new active PON port is switched to the new active PON port according to the new active
  • the PON port status generates corresponding alarm messages.
  • the main fiber master-slave switching is stopped when the set switching number threshold is reached, and the updating of the status of the main and standby PON ports is stopped.
  • the process goes to execute S202, i.e., based on the detection of the upstream optical signals of the main and backup PON ports, the step of detecting and updating the status of the main and backup PON ports is performed.
  • the trunk optical fiber protection method provided by the embodiment of the present application establishes PON port status information based on the PON protection group, and the PON port status information includes the main PON port status and the standby PON port status.
  • the detection and update of the main and standby PON port status are realized by detecting the upstream optical signal of the PON port. Since the PON port status is detected only when an ONU is online in the PON protection group, frequent switching and frequent switching caused by the scenario that the ONU has never been online can be avoided.
  • the execution of the main and standby switching of the trunk optical fiber is controlled according to the standby PON port status.
  • the standby PON port status By synchronously monitoring the main and standby PON port statuses, when the main PON port status is abnormal, the standby PON port status is referenced.
  • the PON port status controls the execution of the active/standby switching based on the standby PON port status, thereby avoiding invalid switching and frequent switching when the standby PON port is unavailable.
  • the main optical fiber master-slave switching will not be initiated. If there is a backup PON port in normal status, it will be combined with the business scenario information corresponding to the PON LOS generated by the main PON port to control the execution of the main optical fiber master-slave switching accordingly.
  • the business scenario information includes the business scenario judgment time and the business scenario type. Through scenario identification, invalid switching and frequent switching in certain scenarios can be effectively avoided.
  • the trunk optical fiber protection method provided by the embodiment of the present application is described in detail.
  • the method can be applied to the OLT, and includes the following steps:
  • the OLT establishes PON status information based on the PON protection group.
  • the PON status information can be stored in the form of a master-slave PON port status table (hereinafter referred to as the status table).
  • the status table is established based on the currently working PON port and the currently non-working PON port in the PON protection group.
  • the status table includes but is not limited to the following fields: PON protection group index, currently working PON port identifier, master PON port (working port) status, standby PON port (non-working port) status, switching indication information.
  • the switching indication information can be in the form of a switching flag.
  • the PON protection group is a logical aggregation concept, and in this embodiment, it includes two physical PON ports, which are mutually active and standby.
  • the field contents of the PON protection group index and the current working PON port identifier can be set according to the actual index value and the identifier value, while the field contents of the active PON port status, the standby PON port status, and the switching flag Flag are generally initialized to "empty".
  • the corresponding PON port status is detected and updated, and the switching flag Flag is set.
  • the OLT detects and updates the status of the main and standby PON ports based on the detection of the upstream optical signals of the PON ports in the PON protection group, and sets a switching flag.
  • the following describes a method for OLT to detect an upstream optical signal of a PON port and determine a corresponding PON port status.
  • the method for detecting the status of the main PON port is implemented by detecting the uplink optical signal of the main PON port of the PON protection group. If no valid uplink optical signal is detected at the main PON port for a set number of frames (for example, 4 frames) continuously, it is determined that the main PON port has generated PON LOS, and the status of the main PON port is set to Abnormal. Otherwise, the status of the main PON port is set to Normal.
  • the detection method of the standby PON port status is implemented by detecting the upstream optical signal of the standby PON port of the PON protection group, including but not limited to detecting specific upstream optical signals such as SD signal and upstream optical power. If a specific upstream optical signal is detected at the standby PON port, the standby PON port status is set to Normal; otherwise, the standby PON port status is set to Abnormal, and the alarm "backbone optical fiber of the standby PON port is broken" is reported.
  • the switching flag Flag can be set according to a certain strategy.
  • the switching flag Flag is set to enable (i.e., switching is possible); otherwise, the switching flag Flag is set to disable (i.e., non-switchable).
  • the OLT sets and maintains a timer T1 (T1 is less than a set service recovery time threshold SLArecover), periodically detects the status of a standby PON port (a currently non-working PON port) according to T1, and synchronizes it to a corresponding status table.
  • T1 is less than a set service recovery time threshold SLArecover
  • main-backup switching when the PON LOS occurs at the main PON port, the status of the main PON port in the status table is Abnormal, and further, different main-backup switching strategies are respectively executed according to the current switching flag Flag.
  • main-backup switching of the trunk optical fiber is referred to as main-backup switching;
  • step S308 is executed, that is, the active/standby switch is not initiated, and an alarm "PON protection group abnormality" is reported.
  • the master-slave switching is initiated first, and then processing is performed according to the status of the new main PON port after the switching (ONU online status) and the business scenario type corresponding to the PON LOS generated by the original main PON port, that is, go to step S307.
  • the active-standby switching will not be initiated, and the update of the active and standby PON port status will be terminated until the active PON port is restored.
  • the primary/standby switchover is initiated, and the status of the new primary PON port after the switchover is detected. If the status of the new primary PON port after the switchover is Normal (including but not limited to ONU online, Or if a valid upstream optical signal is detected at the new active PON port), the alarm reported is "the trunk optical fiber of the original active PON port is broken"; if the status of the new active PON port after the switch is Abnormal, the PON LOS service scenario alarm of the original active PON port is restored, and the alarm reported is "the corresponding ONU LOSi or branch optical fiber is broken".
  • the master-slave switching can be stopped according to a certain strategy or stopped after switching back to the original master PON port. For example, the master-slave switching is stopped when the set switching number threshold is reached to avoid frequent switching between the master and standby PON ports when both the master and standby PON ports are LOS, and at the same time stop the state synchronization of the master and standby PON ports.
  • step S303 when an ONU is back online under any PON port (ie, the main PON port or the backup PON port) in the PON protection group, the process goes to step S303 to start detecting and updating the status of the relevant PON port.
  • PON port ie, the main PON port or the backup PON port
  • OLT first initiates the master-slave switchover, and then processes the service scenario type corresponding to the PON LOS generated by the original master PON port according to the status of the new master PON port after the switchover (ONU online status), specifically:
  • the active-standby switching is stopped according to a certain strategy or the active-standby switching is stopped after switching back to the original active PON port, so as to avoid frequent switching between the active and standby PON ports when both the active and standby PON ports are LOS, and at the same time stop updating the status of the active and standby PON ports.
  • any PON port in the PON protection group i.e., the main PON port or the backup PON If an ONU under the PON port is back online, go to step S303 to start detecting and updating the status of the relevant PON port.
  • trunk optical fiber protection method applied to OLT effectively solves the problems of invalid switching and frequent switching that may exist in trunk optical fiber protection, can save system resources and improve system performance.
  • an embodiment of the present application further provides a trunk optical fiber protection device, which can be arranged in an OLT, EMS or other equipment of an xPON system.
  • a trunk optical fiber protection device 400 as shown in FIG. 4, comprising:
  • Establishing module 401 used to establish PON port status information based on a PON protection group, wherein the PON protection group includes at least two PON ports, and the at least two PON ports are connected to at least one ONU corresponding to the PON protection group through respective trunk optical fibers, and the PON port status information includes at least a main PON port status and a backup PON port status, the main PON port is a currently working PON port among the at least two PON ports, and the backup PON port is a currently non-working PON port among the at least two PON ports.
  • the detection and updating module 402 is used to detect and update the status of the main and backup PON ports based on the detection of the upstream optical signals of the main and backup PON ports when confirming that an ONU is online in at least one ONU corresponding to the PON protection group.
  • the switching control module 403 is used to control the execution of the main optical fiber main and standby switching based on the standby PON port status when the main PON port status is abnormal.
  • the PON port status information may also include at least one of the following: a PON protection group index, a currently working PON port identifier, and switching indication information; wherein, when the status of at least one standby PON port is normal, the switching indication information is set to switchable, and when the status of all standby PON ports is abnormal, the switching indication information is set to non-switchable.
  • the optional structure of the detection update module 402 may include:
  • the main detection submodule 421 is used to detect the uplink optical signal of the main PON port. If no valid upstream optical signal is detected for the set number of frames in a row, it is determined that the main PON port has a PON LOS, and the state of the main PON port is set to abnormal; otherwise, the state of the main PON port is set to normal.
  • the first standby detection submodule 422 is used to detect the uplink optical signal of the standby PON port.
  • the standby PON port state is set to normal; otherwise, the standby PON port state is set to abnormal, and an alarm message of trunk optical fiber breakage of the corresponding standby PON port is generated.
  • the first standby detection submodule 422 is specifically used to periodically detect whether there is a specific uplink optical signal at the standby PON port according to a set first detection period, wherein the specific uplink optical signal includes an SD indication signal, and the first detection period is less than a set service recovery time threshold SLArecover.
  • the optional structure of the switching control module 403 may include:
  • the first control submodule 431 is used for not initiating the main optical fiber master-slave switching and generating an alarm message of PON protection group abnormality when the main PON port status is abnormal and all the backup PON port statuses are abnormal;
  • the second control submodule 432 is used for controlling the execution of the main optical fiber master-slave switching according to the business scenario information corresponding to the PON LOS generated by the main PON port when the main PON port status is abnormal and at least one backup PON port status is normal.
  • the detection update module 402 may further include a second standby detection submodule 423, wherein: the first control submodule 431 is also used to trigger the second standby detection submodule 423 after generating an alarm message of an abnormality of the PON protection group; the second standby detection submodule 423 is used to periodically detect whether there is a specific upstream optical signal at the standby PON port according to a set second detection period, wherein the specific upstream optical signal includes an SD indication signal, and the second detection period is less than the first detection period; when a specific upstream optical signal is detected at the standby PON port, the state of the standby PON port is updated to be normal, and the second control submodule 432 is triggered.
  • the first control submodule 431 is also used to trigger the second standby detection submodule 423 after generating an alarm message of an abnormality of the PON protection group
  • the second standby detection submodule 423 is used to periodically detect whether there is a specific upstream optical signal at the standby PON port according
  • the second control submodule 432 is specifically used to: determine the service scenario judgment time and service scenario type corresponding to the PON LOS generated by the primary PON port, wherein the The business scenario judgment time is used to indicate the time when the ONU comes back online; when the business scenario judgment time is less than or equal to the set business recovery time threshold SLArecover, the execution of the main optical fiber master-slave switching is controlled according to the business scenario type corresponding to the PON LOS generated by the main PON port; when the business scenario judgment time is greater than the set business recovery time threshold SLArecover, the main optical fiber master-slave switching is initiated, and the original standby PON port with a normal status is switched to the currently working PON port, which becomes the new main PON port after the switching; and, the state of the new main PON port after the switching is detected, and a corresponding alarm message is generated according to the state of the new main PON port and the business scenario type corresponding to the PON LOS generated by the original main PON port.
  • the second control submodule 432 in the process of controlling the execution of the main optical fiber master-slave switching according to the business scenario type corresponding to the PON LOS generated by the main PON port, is specifically used for: when the business scenario type is ONU power off, not initiating the main optical fiber master-slave switching, and terminating the updating of the status of the main and backup PON ports until the status of the main PON port is restored to normal; when the business scenario type is the last or only ONU offline, initiating the main optical fiber master-slave switching, switching the original backup PON port with a normal status to the currently working PON port, which becomes the new main PON port after the switching; and detecting the status of the new main PON port after the switching, and generating a corresponding alarm message according to the status of the new main PON port.
  • the second control submodule 432 is specifically used to: when the state of the new main PON port is normal, generate an alarm message of trunk fiber breakage of the original main PON port; when the state of the new main PON port is abnormal, restore the PON LOS alarm of the original main PON port, generate an alarm message of corresponding ONU LOSi or branch fiber breakage, stop the main fiber master-slave switching when the set switching number threshold is reached, and stop updating the state of the main and standby PON ports.
  • the second control submodule 432 generates a corresponding alarm message according to the state of the new main PON port and the service scenario type corresponding to the PON LOS generated by the original main PON port.
  • the service scenario type corresponding to the LOS is that the last or only ONU is offline
  • an alarm message of the trunk fiber break of the original main PON port is generated;
  • the PON LOS alarm of the original main PON port is restored, and an alarm message of the corresponding ONU LOSi or branch fiber break is generated.
  • the set switching number threshold is reached, the main fiber master-slave switching is stopped, and the updating of the status of the main and standby PON ports is stopped.
  • the detection and update module 402 is also used to, after stopping the main optical fiber master-slave switching and stopping the updating of the main and backup PON port status, confirm that an ONU in at least one ONU corresponding to the PON protection group is back online, and then proceed to execute the step of detecting and updating the main and backup PON port status based on the detection of the upstream optical signal of the main and backup PON ports.
  • the detection and update module 402 is also used to not perform the step of detecting and updating the status of the main and backup PON ports based on the detection of the upstream optical signals of the main and backup PON ports when no ONU is online in at least one ONU corresponding to the PON protection group.
  • trunk optical fiber protection device of the embodiment of the present application can be used as the execution subject of the trunk optical fiber protection method shown in Figure 2, so the method can realize the functions realized in Figure 2. Since the principles are the same, they will not be repeated here.
  • the trunk optical fiber protection device detects the status of the PON port only when an ONU is online in the PON protection group, thereby avoiding useless switching and frequent switching caused by the scenario that the ONU has never been online; by synchronizing the status of the main and backup PON ports, the status of the backup PON port is monitored to avoid invalid switching and frequent switching when the backup PON port is unavailable; further, in combination with the business scenario that causes PON LOS, through scenario identification, the occurrence of invalid switching and frequent switching in certain scenarios can be effectively avoided.
  • the embodiment of the present application further provides an electronic device 500, including a processor 501 and a memory 502, wherein the memory 502 stores a program executable on the processor 501.
  • the program or instruction when executed by the processor 501, implements the various steps of the above-mentioned trunk optical fiber protection method and can achieve the same technical effect. To avoid repetition, it will not be repeated here.
  • the electronic devices in the embodiments of the present application include mobile electronic devices and non-mobile electronic devices.
  • An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned trunk optical fiber protection method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.
  • the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.
  • An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored.
  • a program or instruction is stored.
  • the program or instruction is executed by a processor, each process of the above-mentioned trunk optical fiber protection method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.
  • the processor is the processor in the electronic device described in the above embodiment.
  • the readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.
  • An embodiment of the present application provides a computer program product, which is stored in a storage medium.
  • the program product is executed by at least one processor to implement the various processes of the above-mentioned trunk optical fiber protection method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.
  • the technical solution of the present application can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.
  • a storage medium such as ROM/RAM, a disk, or an optical disk
  • a terminal which can be a mobile phone, a computer, a server, or a network device, etc.

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Abstract

Des modes de réalisation de la présente demande divulguent un procédé et un appareil de protection de fibre optique de jonction, un dispositif et un support de stockage lisible. Le procédé de protection de fibre optique de jonction consiste : en fonction d'un groupe de protection de PON, à établir des informations d'état de port PON, le groupe de protection de PON comprenant au moins deux ports PON, les informations d'état de port PON comprenant au moins un état de port PON principal et un état de port PON de secours, un port PON principal étant un port PON actuellement actif, et un port PON de secours étant un port PON actuellement non actif ; lorsqu'il est confirmé qu'une ONU en ligne est présente parmi au moins une ONU correspondant au groupe de protection de PON, en fonction de la détection de signaux optiques de liaison montante des ports PON principal et de secours, à détecter et à mettre à jour les états de port PON principal et de secours ; et lorsque l'état de port PON principal n'est pas normal, à commander la commutation d'une fibre optique de jonction du port PON principal au port PON de secours en fonction de l'état de port PON de secours.
PCT/CN2024/095499 2023-06-13 2024-05-27 Procédé et appareil de protection de fibre optique de jonction, dispositif et support de stockage lisible Pending WO2024255578A1 (fr)

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CN119853788B (zh) * 2025-03-18 2025-07-04 西安西电电力系统有限公司 一种阀控设备到晶闸管的光纤连接冗余系统及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101237254A (zh) * 2008-02-27 2008-08-06 杭州华三通信技术有限公司 光纤保护倒换装置、方法及具有该装置的无源光网络系统
US20100166419A1 (en) * 2008-12-30 2010-07-01 Broadlight, Ltd. Techniques for protecting passive optical networks
CN101888268A (zh) * 2009-05-14 2010-11-17 中兴通讯股份有限公司 一种在以太无源光网络实现主干光纤保护的方法和装置
CN102064885A (zh) * 2010-12-17 2011-05-18 武汉烽火网络有限责任公司 10g-epon系统中任意槽位pon端口快速保护倒换的方法、装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101237254A (zh) * 2008-02-27 2008-08-06 杭州华三通信技术有限公司 光纤保护倒换装置、方法及具有该装置的无源光网络系统
US20100166419A1 (en) * 2008-12-30 2010-07-01 Broadlight, Ltd. Techniques for protecting passive optical networks
CN101888268A (zh) * 2009-05-14 2010-11-17 中兴通讯股份有限公司 一种在以太无源光网络实现主干光纤保护的方法和装置
CN102064885A (zh) * 2010-12-17 2011-05-18 武汉烽火网络有限责任公司 10g-epon系统中任意槽位pon端口快速保护倒换的方法、装置

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