WO2007028313A1 - Procede de gestion a distance d'onu dans un systeme epon - Google Patents

Procede de gestion a distance d'onu dans un systeme epon Download PDF

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Publication number
WO2007028313A1
WO2007028313A1 PCT/CN2006/002011 CN2006002011W WO2007028313A1 WO 2007028313 A1 WO2007028313 A1 WO 2007028313A1 CN 2006002011 W CN2006002011 W CN 2006002011W WO 2007028313 A1 WO2007028313 A1 WO 2007028313A1
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WO
WIPO (PCT)
Prior art keywords
management
onu
optical network
line terminal
optical
Prior art date
Application number
PCT/CN2006/002011
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English (en)
Chinese (zh)
Inventor
Jinshu Lu
Yunpeng Xie
Huannan Ma
Meiling Tang
Jinhui Yu
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 WO2007028313A1 publication Critical patent/WO2007028313A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02—Standardisation; Integration
    • H04L41/0213—Standardised network management protocols, e.g. simple network management protocol [SNMP]
    • 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

Definitions

  • the present invention provides a remote management method for an ONU (Optical Network Unit), and more particularly to a remote management method for an ONU in an EPON (Ethernet Passive Optical Network) system in the communication field.
  • ONU Optical Network Unit
  • EPON Epoxy Passive Optical Network
  • ADSL Asymmetric Digital Subscriber Loop
  • MODEM modem
  • WEB network
  • TELNET Remote login
  • each ONU For the TELNET mode, the WEB mode, and the SNMP mode, each ONU must be assigned an IP address to implement management of the ONU.
  • One OLT optical line terminal
  • the SNMP protocol is simple, easy to use, and fast, it is a common industry standard. It can use the network management system that supports the SNMP standard to manage devices from different vendors to implement unified network management. Therefore, more and more manufacturers support SNMP. the way.
  • PON Passive Optical Network
  • the downlink adopts TDM (Time Division Multiplex) broadcast mode
  • the uplink adopts TDMA (Time Division Multiple Access) mode
  • a topology structure such as a tree type, a star type, and a bus type (a typical structure is a tree structure).
  • EPON equipment Since EPON equipment combines the advantages of PON and Ethernet, the system structure is simplified, the standard is loose, and the cost is lower, so EPON equipment will be more and more applied. This involves the management of the EPON system. Since the EPON system is a new service application mode, an OLT and multiple ONUs form a relatively independent EPON system. For the management of this EPON system, it can be regarded as a management. The system looks at (0LT and all ONUs), and can also be treated as multiple independent management systems. The OLT is an independent management system, and the other 0 U are separate management systems.
  • each ONU implements an AGENT (network management agent), which directly sends the network management information to the ONU, which will take up a lot of The IP address is a huge waste for both the public and private IP addresses.
  • AGENT network management agent
  • each ONU implements a standard SNMP AGENT.
  • Each ONU needs to be assigned an IP address, and management data is sent directly from the network management to the 0NU.
  • the IP address required by the traditional method should be 1 (manage the IP address of the device at the OLT) + NXM (manage the ONU device) IP address).
  • the current standard has very weak management support for ONUs. Only some variable requests and variable responses are defined, that is, only the values of some MIB (Management Information Base) variables can be obtained, and only the management information represented by SNMP to managed objects is supported. Read operations cannot support other operations and cannot be configured and managed.
  • MIB Management Information Base
  • the technical problem to be solved by the present invention is to provide a remote management method for a terminal device in an EPON system, and perform unified management on the network through standard SNMP.
  • the invention provides a remote management method for an optical network unit in an Ethernet passive optical network system, comprising the following steps:
  • the network management unit sends a simple network management protocol request packet to the optical line terminal device, where the request packet is in the request packet Containing management information and an optical network unit number to be managed by the management information;
  • the protocol request packet received by the simple network management protocol agent is parsed into a plurality of management information base objects, and the management information of the remote optical network unit operations under the jurisdiction is determined.
  • the optical line terminal requests the optical network unit number carried by the packet according to the protocol, and checks whether the optical network unit under the jurisdiction supports remote management. If supported, the management information database object and its attributes are encapsulated into an operation and maintenance management frame, and sent. To the optical network unit;
  • the optical network unit parses the received operation and maintenance management frame, extracts a management information base object therefrom, and determines to support the extracted management information base object;
  • the optical network unit locally implements the operation of the management information base object, and sends back a management response frame to the optical line terminal to which it belongs, which carries the result returned by the actual operation;
  • the optical line terminal returns the result of the actual operation back to the network management unit in a simple network management protocol response packet.
  • remote management method may further include the following steps:
  • an operation and maintenance management frame is assembled by the optical line terminal and sent to the optical network unit under its jurisdiction, and the optical network unit is required to confirm whether to support remote management;
  • the optical network unit sends back a response frame to the optical line terminal according to whether it supports remote management, and carries confirmation information about whether it is supported;
  • the optical line terminal parses the received response frame, confirms and records whether the optical network unit supports remote management.
  • remote management method may further include the following steps:
  • the optical network unit When the optical network unit detects that an abnormality occurs in itself, the abnormal information is encapsulated into an operation and maintenance management frame and sent to the optical line terminal to which it belongs;
  • the optical line terminal converts the information in the received operation and maintenance management frame into a simple network management protocol trap packet and reports it to the network management unit.
  • the invention realizes unified management of all OJs of the OLT and the lower band thereof, and saves a large number of IP address resources. Since the SNMP protocol is used for management on the OLT side, the ONU can pass The simple AGENT responds to the management request on the OLT side and supports any standard MIB object management. The SNMP and MIB objects are standard, which facilitates the unified management of devices between different manufacturers. It is also possible for the network management to achieve unified management and to easily expand the new functions. BRIEF abstract
  • FIG. 1 is a diagram of a framework of the entire management according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of implementing ONU remote management on the OLT side device to determine whether the ONU supports ONU remote management according to an embodiment of the present invention
  • FIG. 3 is a flowchart of an operation of implementing an MIB object for realizing remote ONU on an OLT side device according to an embodiment of the present invention
  • FIG. 4 is a flowchart of an exception processing for implementing remote ONU reporting on an OLT side device according to an embodiment of the present invention
  • FIG. 5 is a flowchart of implementing ONU remote management on the ONU side device in response to the OLT confirming whether the ONU itself supports ONU remote management according to an embodiment of the present invention
  • FIG. 6 is a flowchart of implementing ONU remote management to implement MIB object processing on an ONU side device according to an embodiment of the present invention
  • FIG. 7 is a flowchart of implementing local abnormal reporting processing on an ONU side device by using ONU remote management according to an embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of a specific OAMPDU frame in an existing standard
  • FIG. 9 is a schematic diagram of a data field format in a specific OAMPDU frame structure in a Branch/Leaf mode
  • FIG. 10 is a schematic diagram of a data field format in a specific OAMPDU frame structure in an MIB manner. Preferred embodiment of the invention
  • the invention adopts an OAM frame based on the SNMP protocol and the EPON standard to manage the ONU. Extending the existing standard OAM or extending OAM's Organization Specific Maintenance OAMPDU, Organization Specific Integration TLV, and Organization Specific Event TLV Manage ONU devices.
  • the invention adopts a standard MIB management object, implements SNMP AGENT on the device on the OLT side, and when the AGENT receives the SNMP packet, parses all MIB objects. If a MIB object manages an OU, it will The MIB object is encapsulated in an OAM frame and sent to the corresponding ONU. On the ONU side, it is processed by a simple AGENT on the ONU side. If an OAM frame processed for the MIB object is received, the MIB object is immediately parsed, and then the ONU is operated. The response OAM frame is then sent back to the OLT.
  • the invention sends all management information of the network management to the OLT first, and then is forwarded by the OLT to the ONU through the OAM. In this way, only one IP address is required.
  • the operation data of all the management information there is specifically the ONU under the OLT, which can be known according to the data sent by the network management.
  • the device (or the network element, the ONU, and the ONU as another independent device) of the present invention has multiple OLT line cards, and each line card has multiple OLTs, and each OLT is "hanged”.
  • One ONU assuming there are 5 OLT line cards, there are 4 OLTs on each line card, and there are 32 ONUs under each OLT.
  • the SNMP AGENT working process on the OLT side is as follows:
  • ONU remote management control OAM frame When an ONU registration is successful, a "inquiry OAM frame" is sent, and the ONU is required to confirm whether it supports remote management, which is called 'ONU remote management control OAM frame,;
  • ONU remote management data OAM frame The attribute of the MIB object is encapsulated into an OAM frame, and the OAM frame is sent, which is called "ONU remote management data OAM frame"; its attribute may be an OID (object identifier definition) of the MIB object, or a other unique identifier, such as EPON.
  • the corresponding leaf node in the tree in the standard, or the operation type such as directly reading the management information value of the managed object, reading the value of the management information of the next managed object, and writing the management information of the managed object Operation, or the value of the MIB object and its length, etc.;
  • the AGENT on the OLT sends an SNMP response to the NMS.
  • the SNMP AGENT on the OLT side can also process the "ONU remote management TRAP OAM frame" sent by the ONU, convert it into a standard SNMP TRAP packet and report it to the NMS, and then send a response OAM frame to the ONU, which is called ' The ONU remotely manages the TRAP response OAM frame.”
  • the ONU side does not need to process the SNMP protocol, only processes the MIB object, responds to the 'ONU remote management control OAM frame' and 'ONU remote management data OAM frame' sent by the OLT side through a simple AGENT, and can actively send a ' ONU remotely manages TRAP OAM frames.”
  • the ONU side AGENT processes the received ONU remote management control OAM frame sent by the OLT, and returns whether the ONU remote management OAM frame is currently supported, which is called 'ONU remote management control response OAM frame'.
  • the ONU side AGENT processes the received 'ONU remote management data OAM frame' sent by the OLT, parses the frame, completes the specific operation of the ONU according to the MIB object, and encapsulates the operation result into the OAM frame and sends it back to the OLT. It is called 'ONU Remote Management Data Response OAM Frame'. If an abnormality occurs locally in the ONU, such as an alarm, the AGENT on the OU side encapsulates the relevant information into the OAM frame and immediately sends it to the OLT, which is called 'ONU Remote Management TRAP OAM Frame'.
  • Management messages can be initiated from the NMS or SNMP MANAGER (step 101).
  • the OLT can analyze the processing and directly respond to the local operation of the OLT, such as directly sending back SNMP response packets.
  • 102 it is also possible to encapsulate the message into the OAM frame and send it to the ONU (step 103).
  • the ONU side is simply sent to the OLT through the OAM frame after the simple AGENT receiving process (step 104), and the OLT side AGENT re-analyzes and processes the response to the network management operation.
  • the SNMP response packet is sent back (step 105); the management message may also be initiated at the OLT, and the remote control management frame is sent to the ONU (step 106), asking whether the ONU supports remote management, and the ONU can support the response to the OLT, and return the OAM frame (step 107).
  • the special message can also be initiated at the ONU, such as an exception message.
  • the ONU sends an OAM frame of the exception message to the OLT side (step 108). After the OLT analyzes the processing, the message is sent to the network management system, for example, by using the SNMP TRAP method. Network management (step 109).
  • the flowchart shown in Figure 2 is used by the OLT to confirm to the ONU whether remote management of the ONU is supported. After the registration is successful, it is sent to the ONU.
  • an OAM frame is assembled at the OLT for querying whether an ONU supports ONU remote management, and then sends an 'ONU remote management control OAM frame to the ONU, (step 201); setting a timer and a counter, waiting The response of the ONU, if the OAM frame of the ONU has not been received after the timer expires, the "ONU Remote Management Control OAM Frame" is sent again (step 202); it is determined whether the OAM response frame of the ONU is received within the maximum counting range ( Step 203); if the response frame of the ONU has not been received for a certain number of times, it is determined that the ONU does not support the ONU remote management, and the ONU does not support the ONU remote management (step 207); if the response frame of the ONU is received, the resolution is resolved.
  • step 204 Receiving the 'ONU remote management control response OAM frame' (step 204), determining that the ONU supports remote management (step 205); if supported, saving the ONU to support ONU remote management (step 206); if parsing, confirming the ONU If remote management is not supported, saving the ONU does not support ONU remote management (step 208).
  • the flow chart of the SNMP request operation delivered by the MANAGER is processed.
  • the AGENT of the OLT side first parses the SNMP request sent by the MANAGER (step 302), decomposes into an independent MIB object, and then analyzes each MIB object in turn (step 303).
  • each MIB object is an operation on the remote ONU (step 304), if not, processing locally (step 310), if it is checking whether the ONU supports remote management (step 305), if not supported Then return to MANAGER - an ONU does not support the remote management code; if supported, the attributes of the MIB object are encapsulated into an OAM frame (one or more MIB objects can be encapsulated at the same time) (step 306), and then the OAM frame is delivered
  • the 'ONU remote management data OAM frame' of the message step 307), start a timer (step 308), and if the timer has not timed out yet received the response of the ONU, return to the MANAGER-ONU response timeout code (step 312) Otherwise, the response frame of the ONU is processed (step 309), and the response information is returned to the MANAGER (step 313).
  • the information flow chart for handling the abnormality of the ONU is processed.
  • the information in the OAM frame is converted into the information required for the SNMP TRAP message, and a standard SNMP TRAP message is assembled. Send to MANAGER (step 402).
  • the ONU responds to the OLT to confirm whether the ONU supports the remote management response flow graph.
  • step 501 Whenever the ONU receives the "ONU remote management control OAM frame, (step 501), confirm whether it supports remote management itself (step 502), if supported, the assembled ONU supports the ONU remote management OAM frame (step 503); If not supported, the constituent ONUs do not support the ONU remote management of the OAM frame (step 504), and then return the actual result to the OLT via the "ONU Remote Management Control Response OAM Frame" (step 505).
  • the ONU side processes the MIB objects in the OAM frame.
  • Receiving the 'ONU remote management data OAM frame sent by the OLT and then (step 601), parsing the OAM frame, extracting all MIB objects (step 602), and then processing sequentially, first Determining whether the ONU supports the MIB objects (step 603). If not, directly returning the "ONU remote management data response OAM frame, and giving the OLT, carrying information that does not support the MIB object (step 605); if supported, locally The operation on the MIB object is implemented (step 604), and then the 'ONU remote management data response OAM frame is sent back to the OLT, carrying the result returned during the actual operation (step 606).
  • the ONU is handled abnormally locally.
  • the ONU itself detects that an abnormality has occurred (step 701), the related information of the abnormality is encapsulated into an OAM frame (step 702), and the 'ONU remote management TRAP OAM frame' is sent to the OLT (step 703), and the ONU is locally reported.
  • the abnormal situation If the ONU itself detects that an abnormality has occurred (step 701), the related information of the abnormality is encapsulated into an OAM frame (step 702), and the 'ONU remote management TRAP OAM frame' is sent to the OLT (step 703), and the ONU is locally reported. The abnormal situation.
  • the management information of the ONU may be encapsulated into a Data field according to a certain format, for example, as shown in FIG. 9 or FIG. The format used.
  • an ONU remote management method is used, and the format in the Data data field is used.
  • OUI is the unique identifier of the supplier, 3 bytes
  • Code is the opcode, 1 byte, for example, to indicate that the current operation is to set / get the request / response;
  • Type is the operation type, 1 byte. For example, it can indicate which attribute is currently operated, such as Ethernet port or CATV port.
  • Port is the port number, 1 byte, such as Ethernet port 1, 2, etc.;
  • the Variable Container is a variable carried in the OAM frame, and a branch/leaf corresponds to an MIB object (for each of the corresponding standard standards that do not exist);
  • Another ONU remote management method is adopted, and the DATA data field is used.
  • OUI is the unique identifier of the supplier, 3 bytes
  • Code is an operation code, 1 byte, for example, used to indicate the SNMP operation issued by the current network management, for example, as shown in the following table;
  • each ONU implements an AGENT (network management agent) to directly send the network management information to the ONU, which will occupy a large number of IP addresses. It is a huge waste for both the public and private IP addresses.
  • the invention realizes unified management of the optical network unit and saves a large amount of IP address resources. Because the SNMP protocol is used on the OLT to support any standard MIB object management, the SNMP and MIB objects are standard. This facilitates unified management of devices between different vendors. When services are interconnected, the NMS is managed. It is also possible to achieve unified management and easy expansion of new features.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé de gestion à distance d'ONU dans un système EPON, qui comprend les étapes suivantes: il gère ONU par l'extension de la trame OAM standard présente; il gère les objets à l'aide de la MIB standard; AGENT reçoit le paquet SNMP sur les dispositifs côté OLT; il analyse tous les objets MIB; si un certain objet est utilisé pour gérer un certain ONU, il encapsule l'objet dans la trame OAM et le transmet à l'ONU correspondant; du côté ONU, il analyse l'objet de la trame, active l'ONU et renvoie la trame de réponse à OLT. La présente invention met en oeuvre la gestion unifiée d'ONU et économise les ressources d'adresses IP abondantes de manière à mettre en oeuvre la gestion unifiée entre les dispositifs de différents fabricants.
PCT/CN2006/002011 2005-09-07 2006-08-09 Procede de gestion a distance d'onu dans un systeme epon WO2007028313A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2005100986685A CN100454835C (zh) 2005-09-07 2005-09-07 以太网无源光网络系统中光网络单元远程管理方法
CN200510098668.5 2005-09-07

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