WO2009009994A1 - Procédé, dispositif et système de localisation de défaut dans un réseau optique passif - Google Patents

Procédé, dispositif et système de localisation de défaut dans un réseau optique passif Download PDF

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Publication number
WO2009009994A1
WO2009009994A1 PCT/CN2008/071603 CN2008071603W WO2009009994A1 WO 2009009994 A1 WO2009009994 A1 WO 2009009994A1 CN 2008071603 W CN2008071603 W CN 2008071603W WO 2009009994 A1 WO2009009994 A1 WO 2009009994A1
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WO
WIPO (PCT)
Prior art keywords
access terminal
terminal device
power
offline
message
Prior art date
Application number
PCT/CN2008/071603
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English (en)
Chinese (zh)
Inventor
Cheng Luo
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009009994A1 publication Critical patent/WO2009009994A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/14—Monitoring arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-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
    • H04J3/1694—Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers

Definitions

  • the embodiments of the present invention belong to the field of network communications, and in particular, to a method, device, and system for fault location of a passive optical network.
  • Passive Optical Network (PON) technology is a point-to-multipoint optical fiber access technology.
  • the PON is generally an optical line terminal (OLT) on the central side, an optical network unit/optical network terminal (ONU/ONT) on the user side, and an optical distribution network (Optical Distribution Network). , ODN ) composition.
  • OLT optical line terminal
  • ONU/ONT optical network unit/optical network terminal
  • ODN optical distribution network
  • One PON port of the OLT can access multiple ONUs/ONTs.
  • the difference between ONUs and ONTs is that the ONTs are directly located at the user end, and there are other networks such as Ethernet between the ONU and the users. Unless otherwise specified, hereinafter referred to as ONT.
  • the ONT can be connected to various Customer Premise Equipment (CPE) through a twisted pair interface or a wireless interface.
  • CPE Customer Premise Equipment
  • Figure 1 shows a typical configuration of a passive optical network, where the OLT is a central access device of a passive optical network, providing an interface between the network side and the service node for the optical access network, and via one or more ODNs
  • the user-side ONT device ie, the access terminal device
  • communicates
  • the ODN provides an optical transmission means between the OLT and the ONT to complete the power distribution of the optical signal
  • the ONT provides a direct or remote user-side interface for the optical access network, terminating An optical signal from the ODN, which processes the optical signal and provides a service interface for the user.
  • EMS Element Management System
  • EMS Element Management System
  • the optical signal transmission direction from the OLT to the ONT is in the downlink direction.
  • the OLT transmits data from the IP network, Time Division Multiplexing (TDM), or video network to the ONT through the optical fiber of the ODN.
  • TDM Time Division Multiplexing
  • the optical signal transmission direction from the ONT to the OLT is In the uplink direction, in the uplink direction, the ONT sends the service data stream or the TDM service stream from each user terminal equipment CPE to the OLT through the optical fiber of the ODN, and sends it to the IP network or the TDM network through the OLT.
  • the PON network technology is a point-to-multipoint optical fiber transmission access technology, that is, one port of an OLT can simultaneously access multiple ONT devices, because one of the ONT devices under the same OLT port fails. The normal service of the remaining ONT devices under the OLT port may be affected.
  • the network fault may occur in the optical fiber connecting the ONT device and the OLT device. Transmission lines (hereinafter referred to as backbone lines) or ONT equipment and other different places, so how to quickly and accurately locate the fault point of the PON network is a difficult problem for PON network maintenance.
  • the fault diagnosis method is used to locate the fault of the PON network, that is, the OLT device sends a diagnostic management command to perform fault diagnosis on the trunk line or the ONT device in the PON network, thereby locating the PON fault.
  • This fault location method cannot diagnose a single faulty ONT device without affecting the remaining ONT devices.
  • the OLT device cannot know the specific location of the faulty ONT device, and thus it is difficult to quickly and accurately locate the passive optical network. malfunction.
  • An object of the present invention is to provide a fault location method for a passive optical network, which aims to solve the problem in the prior art that it is difficult to quickly and accurately locate a fault of a passive optical network.
  • the embodiment of the present invention is implemented by the method for fault location of a passive optical network, and the method includes the following steps:
  • Another object of the embodiments of the present invention is to provide a central access device for a passive optical network, where the device includes:
  • the device power-off message detecting network element is configured to detect a device power-off message reported by the offline access terminal device, where the device power-off message indicates that the access terminal device is offline or caused by power-off or normal power-off instead of the The access terminal device has failed;
  • a fault determining network element configured to detect, according to the detection result of the device power-off message, and the online state of the remaining access terminal devices in the same center access device port as the offline access terminal device, Whether the offline access terminal device or the trunk line connected to the offline access terminal device fails.
  • Another object of the present invention is to provide an access terminal device, where the device includes: a power monitoring unit, configured to monitor power of the access terminal device, when the access terminal device is powered off or shut down normally The power-off message is generated, and the device power-off message indicates that the access terminal device is offline due to power failure or normal power-off, instead of the access terminal device being faulty;
  • a power monitoring unit configured to monitor power of the access terminal device, when the access terminal device is powered off or shut down normally The power-off message is generated, and the device power-off message indicates that the access terminal device is offline due to power failure or normal power-off, instead of the access terminal device being faulty;
  • the device is powered off by the device, and is used to report the device to the passive optical network.
  • Another object of the embodiments of the present invention is to provide a fault location system for a passive optical network, the system comprising:
  • the access terminal device generates a device power-off message when the power is turned off or the power is normally turned off, and reports the device power-off message, and the device power-off message marks that the access terminal device is offline. Is caused by power failure or normal power off rather than failure of the access terminal device;
  • a central access device configured to detect a device power-off message reported by the offline access terminal device, and according to the detection result, and the offline access terminal device is in the same center access device port
  • the online status of the remaining access terminal devices determines whether the offline access terminal device or the trunk line connected to the offline access terminal device fails.
  • the access terminal device when the access terminal device is powered off or the power is normally turned off, a device power-off message is reported to the central access device, and the central access device detects the device power-off message and the access according to the device. Whether the other access terminal devices of the terminal device accessing the device port in the same center are online, whether the access terminal device of the PON network is faulty or the trunk line of the PON network is faulty, and the fault location capability of the PON network is enhanced. The maintainability of the PON network.
  • FIG. 1 is a schematic diagram of a typical configuration of a PON network provided by the prior art
  • FIG. 2 is a flowchart of an implementation of a method for locating a fault of a PON network according to an embodiment of the present invention
  • FIG. 3 is a flowchart of an implementation method for indicating a fault of a PON network according to an embodiment of the present invention
  • FIG. 4 is a timing diagram of an implementation of a fault location method for a PON network according to an embodiment of the present invention.
  • FIG. 5 is a structural diagram of a fault location system for a PON network according to an embodiment of the present invention.
  • a device power-off message is sent to the central access device of the PON network, and the device power-off message indicates that the access terminal device is powered off or normal.
  • the failure of the access terminal device causes the access terminal device to suddenly go offline; the central access device of the PON network determines whether the device is powered off, and accesses the device according to the same center as the access terminal device. Whether other access terminal devices under the port are normally online to determine whether the fault in the PON network occurs on the trunk line or the access terminal device, and the fault location capability of the PON network is enhanced.
  • the central access device mentioned in the embodiment of the present invention is an OLT (hereinafter referred to as an OLT device) in the PON network shown in FIG. 1, and the access terminal device is an ONT device in the PON network shown in FIG. 1. .
  • FIG. 2 is a flowchart showing an implementation process of a fault location method for a PON network according to an embodiment of the present invention, which is described in detail as follows:
  • a registration request of the ONT device is received, and registration of the ONT device is completed according to the registration request.
  • the registration request carries the registration information of the ONT device.
  • the registration information of the ONT device includes the physical location of the ONT device, the vendor information of the ONT device, the serial number of the ONT device, the phone number of the ONT device, and the version information of the ONT device.
  • the registration information of the ONT device is reported to the EMS, and the registration information of the ONT device includes the physical location of the ONT device, the vendor information of the ONT device, the serial number of the ONT device, the phone number of the ONT device, and the ONT device.
  • the version information, etc., the EMS can intelligently manage the ONT device according to the registration information of the ONT device.
  • step S203 the device power-off message reported by the offline ONT device is detected.
  • the device power-off message indicates that the ONT device is suddenly offline (ie, suddenly disconnected from the PON network) because the ONT device is powered down or the power is turned off normally, and the non-ONT device fails.
  • step S204 according to the detection result of step S203, and the online state of the remaining ONT devices on the OLT device and the offline ONT device under the same port of the OLT device, determine the offline ONT device or connect with the offline ONT device. Whether the trunk line fails or not, and obtains the fault information of the PON network.
  • the offline ONT device When the device power-off message reported by the offline ONT device is detected, the offline ONT device is powered off or the power is normally turned off due to the device power-off message, and the non-ONT device fails, and the offline ONT device can be detected.
  • the reported device power-off message indicates that there is an uplink optical signal in the PON network. Therefore, it can be determined that the trunk line connecting the ONT device and the OLT device in the PON network does not fail;
  • the ONT device When the device power-off message reported by the offline ONT device is not detected, it may be because the offline The ONT device is faulty and suddenly goes offline. Therefore, the ONT device does not generate the device power-off message. It may also be unable to power off the device generated by the offline ONT device because the ONT device and the OLT device's trunk line are faulty. The message is reported. At this time, it is detected whether other ONT devices on the same port as the offline ONT device are online.
  • step S205 the fault information of the PON network is reported to the EMS.
  • the EMS can quickly locate the physical location of the faulty ONT device according to the physical address of the ONT device in the registration information of the ONT device, and avoid the fault of the offline ONT device after the fault occurs.
  • the physical location of the ONT device needs to be checked for all the offline ONT devices to prolong the fault locating time. Therefore, the solution provided by the embodiment of the present invention can enhance the fault location capability of the PON network and improve the PON network. Maintenance.
  • FIG. 3 is a flowchart showing an implementation process of an indication method for locating a PON network fault according to an embodiment of the present invention, which is described in detail as follows:
  • step S301 a registration request is sent to the PON network side, and the registration information of the ONT device is carried to apply for registration with the PON network.
  • the registration information is as described above, and details are not described herein again.
  • step S302 a registration success message sent by the PON network side is received to indicate that the ONT device is successfully registered.
  • step S303 the power of the ONT device is monitored.
  • the power of the ONT device drops to a certain threshold, a device power-off message is generated, and the device power-off message indicates that the ONT device is suddenly offline (ie, the ONT device suddenly disconnects from the PON network).
  • the reason for opening the connection is to power down or to turn off the power normally, instead of the failure of the ONT device;
  • step S304 the generated device power-off message is reported to the PON network side.
  • the device power-off message needs to define the message type corresponding to the network according to the network's respective in-band operation, management, maintenance (OAM) protocol. , can be reported to the PON network side.
  • OAM management, maintenance
  • the format of the defined message type is not necessarily the same.
  • the flag ONT device with different formats is uniformly powered off or the power is normally turned off, instead of the message definition of the ONT device failure. Power off the message for the above device.
  • FIG. 4 shows an implementation timing of a fault location method for a PON network according to an embodiment of the present invention.
  • the ONT device sends a registration request to the OLT device of the PON network during the connection process.
  • the registration request carries the registration information of the ONT device, such as the physical location of the ONT device, the vendor information of the ONT device, the serial number of the ONT device, and the ONT.
  • the OLT device on the PON network side responds to the registration request of the ONT device, and returns a registration success message to the ONT device.
  • the PON network side sends the message that the ONT device is successfully registered to the EMS, and the registration success message carries the registration information of the ONT device.
  • the sending of the registration success message to the EMS by the OLT device may use a sending confirmation mechanism, that is, when the EMS receives the registration success message, it returns an acknowledge receipt message to the OLT device.
  • a device power-off message is generated to indicate that the ONT device is suddenly offline (ie, suddenly disconnected from the network) caused by power failure or normal power off, instead of The ONT device has failed.
  • the OLT device on the PON network side determines the offline ONT device or the offline ONT according to the device power-off message reported by the offline ONT device and the online status of the remaining ONT devices under the same OLT device port of the offline ONT device. Whether the trunk line connected to the device fails, and the fault information of the PON network is generated at the same time. The judgment process is the same as above, and will not be described here.
  • the OLT device on the PON network side sends the fault information of the PON network to the EMS.
  • the sending confirmation mechanism can also be used, that is, after receiving the fault information, the EMS sends the PON network to the PON network.
  • the network side returns a confirmation receipt message.
  • the EMS can store the registration information of the ONT device. Accurately determine the physical location of the failed ONT device, enhance the fault detection capability of the PON network, and improve the maintainability of the PON network.
  • FIG. 5 shows the structure of a fault location system of a PON network according to an embodiment of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown.
  • the power monitoring unit 511 built in the ONT device 51 monitors the power of the ONT device 51. When the power of the ONT device 51 drops to a certain threshold, a device power-off message is generated, and the device power-off message indicates that the ONT device 51 is offline. It is caused by a power failure or a normal power off rather than the failure of the ONT device 51.
  • the power monitoring unit 511 may be specifically composed of a power monitoring circuit and a capacitor group, wherein the power monitoring circuit monitors the power of the ONT device 51 in real time, and when the power of the ONT device 51 drops to a certain threshold due to power failure or normal power off.
  • the capacitor group starts to discharge, generating a device power-off message, and simultaneously triggers a hardware interrupt to the device 512 that is powered off by the device built in the ONT device 51.
  • the capacitor group is composed of a plurality of capacitors, and the specific capacity thereof is determined according to the power consumption of the ONT device 51.
  • the device power-off message reporting unit 512 receives the hardware interrupt of the power monitoring unit 511, and reports the device power-off message to the OLT device 52 through the network node interface ( ⁇ ⁇ ).
  • the device power-down message reporting unit 512 can be implemented by using the existing System-On-a-Chip (SOC) of the ONT device 51, so that no additional electronic equipment is needed.
  • the transmission medium connected to the NI interface may be a cable, an optical fiber, a twisted pair or other device built in the OLT device 52.
  • the message detection network element 521 detects the offline ONT device. The device is powered off by the device, and the device is powered off. The ONT device 51 is offline because the power is turned off or the power is normally turned off, instead of the ONT device 51 being faulty.
  • the fault determination network element 522 built in the OLT device 52 can detect the online detection status of the network element 521 according to the device power-off message and the online status of the remaining ONT devices under the same OLT device port of the offline ONT device 51, and can quickly It is judged whether the offline ONT device 51 or the trunk line connected to the offline ONT device 51 fails, and the fault information of the PON network is obtained at the same time.
  • the fault judging process is as described above, and will not be described herein.
  • the registration request sending unit 513 built in the ONT device 51 sends a registration request to the OLT device 52 to carry the ONT when the ONT device 51 accesses the PON network.
  • the registration information of the device 51 wherein the registration information of the ONT device 51 is as described above, and details are not described herein again.
  • the registration request processing network element 523 built in the OLT device 52 completes the registration of the ONT device 51 in accordance with the registration request transmitted from the ONT device 51.
  • the registration success message returning to the network element 524 returns the message that the ONT device 51 is successfully registered to the ONT device 51, and the registration success message receiving unit 514 built in the ONT device 51 receives the registration success message, indicating that the ONT device 51 has successfully registered.
  • the registration information reporting unit 525 built in the OLT device 52 reports the registration information of the ONT device 51 to the network element management system 53.
  • the registration information of the ONT device 51 is as described above, and details are not described herein again.
  • the fault information reporting network element 526 built in the OLT device 52 reports the fault information of the PON network obtained by the fault locating network element 512 to the network element management system 53.
  • the network element management system 53 reports the ONTs reported by the network element 525 according to the registration information.
  • the registration information of the device 51 and the fault information report the fault information of the PON network reported by the network element 526 to accurately locate the specific physical location of the faulty ONT device 51, so that the network element management system 53 does not need to connect to the PON network.
  • the offline ONT device 51 performs - troubleshooting, enhances the fault detection capability of the PON network, and improves the maintainability of the PON network.
  • a device power-off message is generated.
  • the ONT device is suddenly offline, according to whether the device that is reported by the offline ONT device is received. Electrical message, and the same OLT device side as the offline ONT device. The online status of the remaining ONT devices under the mouth determines whether the offline ONT device and the trunk line connected to the ONT device in the PON network are faulty, thereby enhancing the fault location capability of the PON network.
  • the EMS can accurately locate the physical location of the failed ONT device according to the registration information of the ONT device, enhance the fault detection capability of the PON network, and improve the PON. The maintainability of the network.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un procédé de localisation d'un défaut dans un réseau optique passif appartenant au domaine des communications réseau. Le procédé consiste à détecter le message du dispositif hors tension, le message étant rapporté par le dispositif de terminal d'accès hors ligne; déterminer si le défaut s'est produit au niveau du dispositif de terminal d'accès hors ligne ou au niveau de la ligne principale connectée au dispositif de terminal d'accès hors ligne conformément au résultat détecté et à l'état en ligne des autres dispositifs de terminal d'accès sous le même port de dispositif d'accès central que le dispositif de terminal d'accès hors ligne. Un dispositif et un système de localisation de défaut d'un réseau optique passif sont aussi proposés par le mode de réalisation de la présente invention. Le mode de réalisation de la présente invention est utilisé pour déterminer le défaut du réseau optique passif (PON).
PCT/CN2008/071603 2007-07-13 2008-07-10 Procédé, dispositif et système de localisation de défaut dans un réseau optique passif WO2009009994A1 (fr)

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CN200710075888.5 2007-07-13
CN2007100758885A CN101345581B (zh) 2007-07-13 2007-07-13 一种无源光网络的故障定位方法及***

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CN115514615A (zh) * 2021-06-07 2022-12-23 ***通信集团有限公司 用于宽带网络的故障检测方法及装置

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