WO2007028313A1 - A remote management method of onu in epon system - Google Patents

A remote management method of onu in epon system 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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WIPO (PCT)
Prior art keywords
management
onu
optical network
line terminal
optical
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PCT/CN2006/002011
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French (fr)
Chinese (zh)
Inventor
Jinshu Lu
Yunpeng Xie
Huannan Ma
Meiling Tang
Jinhui Yu
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Zte Corporation
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Publication of WO2007028313A1 publication Critical patent/WO2007028313A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q11/0067Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02Standardisation; Integration
    • H04L41/0213Standardised network management protocols, e.g. simple network management protocol [SNMP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0079Operation or maintenance aspects

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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Abstract

A remote management method of ONU in EPON system includes: it manages ONU by the expanding of the present standard OAM frame; it manages the objects using the standard MIB; AGENT receives the SNMP packet on the devices of OLT side; it analyzes all the MIB objects; if a certain object is used to manage a certain ONU, it packets the object into the OAM frame and transmits it to the corresponding ONU; on ONU side, it analyzes the object of the frame, operates ONU, and returns the response frame to OLT. The present invention implements the unified management of ONU, and saves the plentiful IP address resource so as to implement the unified management between the different manufacturer devices.

Description

以太网无源光网络系统中光网络单元远程管理方法  Optical network unit remote management method in Ethernet passive optical network system
技术领域 Technical field
本发明提供一种对 ONU (光网络单元) 的远程管理方法, 尤其涉及通 信领域的 EPON (以太网无源光网络) 系统中的 ONU的远程管理方法。  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.
背景技术 Background technique
在 ADSL (非对称数字用户环线)中, 对于终端 MODEM (调制解调器) 的管理, 通常的实现方法是, 通过本地串口直接管理, 或者给 MODEM设 置一个 IP地址, 然后通过 WEB (网络)方式或者 TELNET (远程登录)方 式登录进行管理。  In ADSL (Asymmetric Digital Subscriber Loop), for terminal MODEM (modem) management, the usual implementation method is to directly manage through the local serial port, or set an IP address to the MODEM, and then through WEB (network) mode or TELNET ( Remote login) login for management.
目前对于 EPON系统中 ONU的管理,很多产商所采取的措施与在 ADSL 中对 MODEM的管理一样, 采用 CLI (命令行接口)方式, 通过串口或者 TELNET来实现对 ONU管理; 或者通过 WEB或 SNMP (简单网络管理协 议) 来对 ONU进行管理。 产商中有的支持其中之一的管理方式, 有的则支 持所有的管理方式。  At present, for the management of ONUs in EPON systems, many manufacturers adopt the same measures as MODEM management in ADSL. They use CLI (command line interface) to implement ONU management through serial port or TELNET; or through WEB or SNMP. (Simple Network Management Protocol) to manage the ONU. Some of the manufacturers support one of the management methods, while others support all management methods.
对于 TELNET方式、 WEB方式以及 SNMP方式, 不论实现一种还是多 种,每个 ONU必须分配一个 IP地址才能实现对 ONU的管理,一个 OLT(光 线路终端)下有多个 ONU ( 1:16, 1:32, 1:64, 1:128等) 。  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) has multiple ONUs (1:16, 1:32, 1:64, 1:128, etc.).
由于 SNMP协议具有简单、 易用、 快速的优点, 并且是一种通用的工 业标准, 可以釆用支持 SNMP标准的网管管理不同厂家的设备, 实现统一 网管, 因此越来越多的产商支持 SNMP方式。  Because 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 (无源光网络)技术是一种点到多点的光纤接入技术, 它由局侧的 OLT、用户侧的 ONU以及 ODN (光分配网络)组成。一般其下行采用 TDM (时分复用) 广播方式, 上行采用 TDMA (时分多址接入) 方式, 而且可 以灵活地组成树型、 星型、 总线型等拓朴结构 (典型结构为树形结构) 。  PON (Passive Optical Network) technology is a point-to-multipoint fiber access technology consisting of the OLT on the office side, the ONU on the user side, and the ODN (Optical Distribution Network). Generally, the downlink adopts TDM (Time Division Multiplex) broadcast mode, and the uplink adopts TDMA (Time Division Multiple Access) mode, and can flexibly form a topology structure such as a tree type, a star type, and a bus type (a typical structure is a tree structure). .
由于 EPON设备融合了 PON和以太网的优点, 系统结构更简化, 标准 宽松, 成本更低, 因此 EPON设备将越来越多地被应用。 这样就涉及到对 EPON系统的管理,由于 EPON系统是一种全新业务应 用模式, 由一个 OLT和多个 ONU组成一个相对独立的 EPON系统,对于这 个 EPON系统的管理, 既可以将其当做一个管理系统来看待(0LT和所有 的 ONU ) , 也可以将其当 多个独立的管理系统来处理, 其中 OLT为一个 独立管理系统, 其他的 0 U分别为单个独立的管理系统。 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.
在 EPON系统管理标准中没有定义如何管理 OLT下的 ONU,仅仅定义 了一些变量值的获取, 不能完成对 ONU的管理, 对 ONU的管理是由各个 产商来实现的。 如果要实现统一网管, 采用 SNMP将是一种明智的选择。  In the EPON system management standard, there is no definition of how to manage the ONU under the OLT. Only the acquisition of some variable values is defined, and the management of the ONU cannot be completed. The management of the ONU is implemented by various manufacturers. If you want to achieve unified network management, using SNMP will be a wise choice.
然而, 由于 EPON系统的特点, 一个 OLT下将带多个 ONU, 如果还是 采用通常的 SNMP做法, 每个 ONU实现一个 AGENT (网管代理) , 直接 将网管管理信息发送到 0NU, 这样将会占用大量的 IP地址, 无论对公网还 是私网的 IP地址来说均是一种巨大的浪费。  However, due to the characteristics of the EPON system, there will be multiple ONUs under one OLT. If the usual SNMP practices are adopted, 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.
例如, 根据传统的 SNMP 做法, 每个 ONU 实现一个标准的 SNMP AGENT, 则每个 ONU需要分配一个 IP地址, 管理数据从网管直接发送到 0NU。 这样, 如果在 OLT处的设备上存在 N个 OLT, 每个 OLT下有 M个 0NU, 则采用传统的方法需要的 IP地址应该需要 1 (管理 OLT处设备的 IP 地址) + N X M (管理 ONU设备的 IP地址)个。  For example, according to the traditional SNMP practice, 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. Thus, if there are N OLTs on the device at the OLT and M ONUs under each OLT, 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).
另外, 现行标准对 ONU的管理支持非常弱, 仅仅定义了一些变量请求 和变量响应,即只能获取部分 MIB(管理信息库)变量的值,仅仅支持 SNMP 对被管理对象所表示的管理信息的读操作, 不能支持其他操作, 不能对其进 行配置管理。  In addition, 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.
发明内容 Summary of the invention
本发明所要解决的技术问题在于提供一种对 EPON 系统中的终端设备 ΟΝυ ό々远程管理方法, 通过标准的 SNMP对网络进行统一的管理。 本发明提供一种以太网无源光网络系统中光网络单元的远程管理方法, 包括如下步骤:  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:
网管单元向光线路终端设备发送简单网络管理协议请求包,该请求包中 包含有管理信息以及该管理信息所欲管理的光网络单元编号; 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;
在光线路终端侧设备上 ,由一个简单网络管理协议代理将收到的所述协 议请求包解析为多个管理信息库对象,并在其中确 对其下辖的远程光网络 单元操作的管理信息库对象;  On the optical line terminal side device, 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. Library object
光线路终端根据协议请求包携带的光网络单元编号,检查其下辖的该光 网絡单元是否支持远程管理, 如果支持, 则将管理信息库对象及其属性封装 入一个操作维护管理帧中, 发送至该光网络单元;  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;
该光网絡单元解析接收到的该操作维护管理帧,从中提取出管理信息库 对象, 并确定支持所述提取出的管理信息库对象;  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;
光网络单元在本地实现对所述管理信息库对象的操作,并向其所属的光 线路终端回送一个管理响应帧, 其中携带有实际操作返回的结果;  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;
所述光线路终端将所述实际操作返回的结果放入简单网络管理协议响 应包中回送给网管单元。  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.
进一步, 所述远程管理方法还可以包括如下步 :  Further, the remote management method may further include the following steps:
在光线路终端侧,由光线路终端组装一个操作维护管理帧发送给其下辖 的光网络单元, 要求该光网络单元确认是否支持远程管理;  On the optical line terminal side, 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;
该光网络单元根据自身是否支持远程管理,向光线路终端回送一个响应 帧, 携带有是否支持的确认信息;  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;
光线路终端解析该接收到的响应帧,确认并记录该光网络单元是否支持 远程管理。  The optical line terminal parses the received response frame, confirms and records whether the optical network unit supports remote management.
进一步, 所述远程管理方法还可以包括如下步骤:  Further, the remote management method may further include the following steps:
当光网络单元检测到 '自身发生异常时,该异常信息封装入一个操作维护 管理帧中, 发送至其所属的光线路终端;  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;
所述光线路终端将接收到的操作维护管理帧中的信息转化为简单网络 管理协议陷阱包上报给网管单元。  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.
本发明实现了对 OLT和其下带的所有 O J进行了统一管理,节省了大 量的 IP地址资源; 由于在 OLT侧采用 SNMP协议进行管理, ONU可以通 过简单的 AGENT来响应 OLT侧的管理请求, 支持任何标准的 MIB对象管 理, SNMP和 MIB对象均为标准的, 便于实现不同的产商之间的设备的统 一管理, 当业务实现互连互通后, 网管也有可能实现统一管理, 以及易于实 现对新增功能的扩充。 附图概述 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
图 1是根据本发明的实施例所述的整个管理的框架体系图;  1 is a diagram of a framework of the entire management according to an embodiment of the present invention;
图 2是根据本发明的实施例实现 ONU远程管理在 OLT侧设备上确定 ONU是否支持 ONU远程管理流程图;  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;
图 3是根据本发明的实施例实现 O U远程管理在 OLT侧设备上实现远 端 ONU的 MIB对象操作流程图;  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;
图 4是 >据本发明的实施例实现 ONU远程管理在 OLT侧设备上实现远 端 ONU上报的异常处理流程图;  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;
图 5是根据本发明的实施例实现 ONU远程管理在 ONU侧设备上响应 OLT确认 ONU本身是否支持 ONU远程管理流程图;  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;
图 6是根据本发明的实施例实现 ONU远程管理在 ONU侧设备上实现 MIB对象处理流程图;  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;
图 7是根据本发明的实施例实现 ONU远程管理在 ONU侧设备上实现 本地异常上报处理流程图;  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;
图 8是现有标准中的特定 OAMPDU帧结构示意图;  8 is a schematic structural diagram of a specific OAMPDU frame in an existing standard;
图 9是采用 Branch/Leaf方式下特定的 OAMPDU帧结构中数据字段格 式示意图;  FIG. 9 is a schematic diagram of a data field format in a specific OAMPDU frame structure in a Branch/Leaf mode;
图 10是采用 MIB方式下特定的 OAMPDU帧结构中数据字段格式示意 图。 本发明的较佳实施方式  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
本发明采用基于 SNMP协议和 EPON标准的 OAM帧来管理 ONU, 通 过对现有标准 OAM的扩展或者对 OAM的 Organization Specific OAMPDU (组件操作维护管理协议数据单元) 、 Organization Specificlnformation TLV (组件消息类型长度值 )和 Organization Specific Event TLV (组件事件类型 长度值)进行扩展来管理 ONU设备。 本发明采用标准的 MIB管理对象, 在 OLT侧的设备上实现 SNMP AGENT, 当 AGENT接收到 SNMP包时, 解析 出所有的 MIB对象, 如果某个 MIB对象是对某个 O U进行管理的, 则将 该 MIB对象封装到 OAM帧中, 发送到相应的 ONU; 在 ONU侧, 由 ONU 侧的简单的 AGENT进行处理, 如果接收到对 MIB对象处理的 OAM帧, 立 刻解析其 MIB对象, 然后操作 ONU, 接着回送响应的 OAM帧给 OLT。 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.
由于本发明是将网管所有的管理信息首先发送到 OLT, 然后再由 OLT 通过 OAM转发到 ONU。 这样, 只需要一个 IP地址即可。 在所有的管理信 息的操作数据中都存在具体是那个 OLT下的那个 ONU, 其可以根据网管的 下发的数据来获知。  Because 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. In 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.
比如本发明中的设备(或者网元, 不包括 ONU, ONU作为另一个独立 的设备)上存在多块 OLT的线卡,每块线卡上有多个 OLT,每个 OLT下 "挂" 多个 ONU, 假设存在 5块 OLT线卡, 每块线卡上存在 4个 OLT, 每个 OLT 下有 32个 ONU。 OLT编号从 1-20, ONU的编号 1/1-1/32, 2/1-2/32, ……, 20/1-20/32, 对于 IP地址, 一个设备以及连同下面的 ONU只需要一个(否 则使用传统方法将需要 1 + 5 x 4 x 32 = 641个 IP地址) , 在进行管理时, 比如需要对 OLT 10下的 ONU 20进行管理, 则网管将需要管理的信息以及 连同 OLT和 ONU的编号一起下发到设备, 即需要指明对那个 OLT下的某 个 ONU进行操作。 设备接收到该信息后, 将该信息转换为指定的格式, 封 装进 OAM帧中, 然后向该 ONU发送 OAM帧。 也就是说, 网管和 OLT设 备传递管理信息时需要指明当前操作哪个 OLT下的 ONU, 而 OLT设备则 可以进而将 OLT和 ONU信息去掉, 直接和 ONU传递管理信息。  For example, 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 OLT number is from 1-20, ONU number 1/1-1/32, 2/1-2/32, ..., 20/1-20/32, for IP address, only one device and the ONU below need only One (otherwise using the traditional method will require 1 + 5 x 4 x 32 = 641 IP addresses), in the management, such as the need to manage the ONU 20 under the OLT 10, then the network management will need to manage the information along with the OLT and The ONU number is sent to the device together, that is, it needs to indicate the operation of an ONU under that OLT. After receiving the information, the device converts the information into a specified format, encapsulates it into an OAM frame, and then sends an OAM frame to the ONU. That is to say, when the network management and the OLT device transmit the management information, it is necessary to indicate which ONU is currently operated by the OLT, and the OLT device can further remove the OLT and ONU information, and directly transmit the management information with the ONU.
在 OLT侧的 SNMP AGENT工作过程如下:  The SNMP AGENT working process on the OLT side is as follows:
当某个 ONU注册成功时, 发送一个"询问的 OAM帧", 要求该 ONU确 认是否支持远程管理, 将其称为' ONU远程管理控制 OAM帧,,; ·  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,;
AGENT将接收到的 SNMP协议包进行解析, 分解为一个一个单独的 MIB对象; AGENT parses the received SNMP protocol packets and decomposes them into a single one. MIB object;
如果某个 MIB对象为对某个 ONU的管理操作, 则首先检查该 ONU是 否支持 ONU远程管理, 如果不支持, 则在 SNMP应答包中返回一个不支持 ONU远程管理码给网管; 如果支持则将 MIB对象的属性封装进 OAM帧, 发送该 OAM帧, 将其称为" ONU远程管理数据 OAM帧"; 其属性可以是 MIB对象的 OID (对象标识定义) , 或者一个其他唯一的标识, 如 EPON 标准中的树中的相应叶子节点等, 或是操作类型, 如直接读取被管理对象的 管理信息值、读取下一个被管理对象的管理信息的值,对被管理对象的管理 信息进行写操作, 或是 MIB对象的值以及其长度等等;  If a MIB object is a management operation for an ONU, first check whether the ONU supports ONU remote management. If not, return an ONU remote management code to the NMS in the SNMP response packet; if supported, 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.;
等待 ONU的对' ONU远程管理数据 OAM帧"的响应, 如果响应超时, 则在 SNMP应答包中返回一个等待' O U远程管理数据 OAM帧"响应超时 码给网管; 否则将 ONU响应的实际信息(成功或者失败等)放入 SNMP应 答包中;  Waiting for the response of the ONU to the 'ONU remote management data OAM frame', if the response times out, return a waiting for 'OU remote management data OAM frame' response timeout code to the network management in the SNMP response packet; otherwise, the actual information of the ONU response ( Success or failure, etc.) into the SNMP response packet;
OLT侧的 AGENT回送 SNMP应答给网管。  The AGENT on the OLT sends an SNMP response to the NMS.
OLT侧的 SNMP AGENT还可处理 ONU主动发送来的 "ONU远程管理 TRAP OAM帧", 将其转化为标准的 SNMP TRAP包上报给网管, 然后发送 一个响应 OAM帧给该 ONU,将其称为' ONU远程管理 TRAP响应 OAM帧"。  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."
ONU侧不需要处理 SNMP协议, 仅仅对 MIB对象进行处理, 通过一个 简单的 AGENT来响应 OLT侧发送的' ONU远程管理控制 OAM帧"和' ONU 远程管理数据 OAM帧,,以及能够主动发送一个' ONU远程管理 TRAP OAM 帧"。  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."
ONU侧 AGENT处理接收到的 OLT发送来的' ONU远程管理控制 OAM 帧,,, 回送当前是否支持 ONU远程管理 OAM帧, 将其称为' ONU远程管理 控制响应 OAM帧"。  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'.
ONU侧 AGENT处理接收到的 OLT发送来的' ONU远程管理数据 OAM 帧", 对该帧进行解析, 根据 MIB对象完成对 ONU的具体操作, 将其操作 结果封装到 OAM帧中回送给 OLT,将其称为' ONU远程管理数据响应 OAM 帧"。 如果 ONU本地发生异常, 如告警等, O U侧 AGENT将其相关信息封 装到 OAM帧中, 立刻发送给 OLT, 将其称为' ONU远程管理 TRAP OAM 帧"。 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'.
如图 1所示,为管理整个 EPON系统的框架体系图。管理消息(如 SNMP 请求包)可以从网管或者 SNMP MANAGER (管理员)发起 (步骤 101 ) , OLT接收到后, 经过解析分析处理, 可能对 OLT本地操作直接响应, 如直 接回送 SNMP响应包(步骤 102 ) , 也有可能将该消息封装进 OAM帧发送 到 ONU (步骤 103 ) , ONU侧简单 AGENT接收处理后再通过 OAM帧回送 给 OLT (步骤 104 ) , OLT侧 AGENT再分析处理后响应网管操作, 回送 SNMP响应包(步骤 105 ); 管理消息也可以在 OLT处发起, 向 ONU发送 远程控制管理帧 (步骤 106 ) , 询问 ONU是否支持远程管理, ONU能支持 则响应 OLT, 回送 OAM帧(步骤 107 ); 特殊消息也可以在 ONU处发起, 比如异常消息等, ONU向 OLT侧发送异常消息的 OAM帧 (步骤 108 ) , OLT分析处理后将该消息发送给网管,例如可以通过 SNMP TRAP方式发给 网管 (步骤 109 ) 。  As shown in Figure 1, the framework diagram for managing the entire EPON system. Management messages (such as SNMP request packets) can be initiated from the NMS or SNMP MANAGER (step 101). After receiving the OLT, 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).
如图 2所示流程图,用于 OLT向 ONU确认是否支持 ONU的远程管理, 注册成功后向 ONU发送。  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.
首先,在 OLT处组装一个 OAM帧,用于查询某个 ONU是否支持 ONU 远程管理, 然后向该 ONU发送' ONU远程管理控制 OAM帧,,(步骤 201 ); 设置一个定时器与一个计数器, 等待 ONU的响应, 如果定时器超时后还没 有收到 ONU的响应 OAM帧,再次发送" ONU远程管理控制 OAM帧", (步 骤 202 );判断是否在最大计数范围内收到 ONU的 OAM响应帧(步骤 203 ); 如果达到一定次数还没有接收到 ONU的响应帧,则确定该 ONU不支持 ONU 远程管理,保存该 ONU不支持 ONU远程管理(步骤 207 ); 如果收到 ONU 的响应帧, 则解析收到的' ONU远程管理控制响应 OAM帧"(步骤 204 ) , 判断该 ONU支持远程管理(步驟 205 ) ; 如果支持, 则保存该 ONU支持 ONU远程管理(步骤 206 ); 若解析后确认该 ONU不支持远程管理, 则保 存该 ONU不支持 ONU远程管理(步骤 208 ) 。 如图 3所示, 为处理 MANAGER下发的 SNMP请求操作流程图。 First, 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. 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). As shown in Figure 3, the flow chart of the SNMP request operation delivered by the MANAGER is processed.
在 MANAGER下发 SNMP请求后(步驟 301 ),首先在 OLT侧的 AGENT 解析 MANAGER下发的 SNMP请求(步骤 302 ) ,分解为一个个独立的 MIB 对象, 再依次对各个 MIB对象进行分析(步骤 303 ) , 判断各个 MIB对象 是否为对远端 ONU的操作 (步骤 304 ), 如果不是则就在本地进行处理(步 骤 310 ), 如果是再检查该 ONU是否支持远程管理(步骤 305 ) , 如果不支 持则返回给 MANAGER—个 ONU不支持远程管理码; 如果支持则将 MIB 对象的属性封装进一个 OAM帧中 (可以同时封装一个或者多个 MIB对象) (步骤 306 ),然后下发包含该 OAM帧信息的' ONU远程管理数据 OAM帧" (步骤 307 ) , 启动一个定时器(步骤 308 ) , 如果定时器超时还没有收到 ONU的响应, 则返回给 MANAGER—个 ONU响应超时码 (步骤 312 ) , 否则处理 ONU的响应帧 (步骤 309 ) , 将响应信息返回给 MANAGER (步 骤 313 ) 。  After the SNMP request is sent by the MANAGER (step 301), 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). And determining whether 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).
如图 4所示, 为处理 ONU的异常上报信息流程图。  As shown in Figure 4, the information flow chart for handling the abnormality of the ONU is processed.
当接收到 ONU上报的异常信息的 OAM帧, 即' ONU远程管理 TRAP OAM帧"后 (步骤 401 ) , 将 OAM帧中的信息转化为 SNMP TRAP消息需 要的信息, 组装一个标准的 SNMP TRAP消息, 发送给 MANAGER (步骤 402 ) 。  After receiving the OAM frame of the abnormality information reported by the ONU, that is, the 'ONU remote management TRAP OAM frame' (step 401), 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).
如图 5所示, 为 ONU响应 OLT确认 ONU是否支持远程管理的响应流 程图。  As shown in Figure 5, the ONU responds to the OLT to confirm whether the ONU supports the remote management response flow graph.
不论何时,只要 ONU接收到 "ONU远程管理控制 OAM帧,,(步骤 501 ) , 确认本身是否支持远程管理(步驟 502 ) ,如果支持,则组装 ONU支持 ONU 远程管理 OAM帧(步驟 503 ); 如果不支持, 则组成 ONU不支持 ONU远 程管理 OAM帧 (步驟 504 ) , 然后将实际结果通过 "ONU远程管理控制响 应 OAM帧"返回给 OLT (步骤 505 ) 。  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).
如图 6所示, 为 ONU侧对 OAM帧中的 MIB对象的处理。  As shown in Figure 6, the ONU side processes the MIB objects in the OAM frame.
接收到 OLT发送来的' ONU远程管理数据 OAM帧,,后 (步骤 601 ) , 解析该 OAM帧, 提取所有的 MIB对象(步骤 602 ) , 然后依次处理, 首先 判断 ONU是否支持这些 MIB对象(步骤 603 ) ,如果不支持,直接回送" ONU 远程管理数据响应 OAM帧,,给 OLT, 携带不支持该 MIB对象的信息(步骤 605 ) ; 如果支持, 则在本地实现对 MIB对象的操作 (步骤 604 ) , 然后回 送' ONU远程管理数据响应 OAM帧,,给 OLT, 携带实际操作时返回的结果 (步骤 606 ) 。 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).
如图 7所示, ONU本地发生异常时的处理。  As shown in Figure 7, the ONU is handled abnormally locally.
如果 ONU本身检测到发生异常 (步骤 701 ) , 则将该异常的相关信息 封装进一个 OAM帧中(步骤 702 ),向 OLT发送' ONU远程管理 TRAP OAM 帧"(步骤 703 ) , 上报 ONU本地出现的异常情况。  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.
本发明中所述的对 OAM帧的扩展与封装方式, 可以参考图 8、 9、 10 来进一步说明。  The manner of expanding and encapsulating the OAM frame described in the present invention can be further described with reference to FIGS. 8, 9, and 10.
如图 8所示, 为现有标准中定义的特定组织的 OAMPDU帧格式, 根据 本发明, 可以将对 ONU的管理信息按照一定的格式封装进 Data字段中, 例 如, 像图 9或者图 10中采用的格式。  As shown in FIG. 8, the OAMPDU frame format of a specific organization defined in the existing standard, according to the present invention, 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.
如图 9所示, 举例采用一种 ONU远程管理的方式, Data数据字段中的 格式。  As shown in Figure 9, an ONU remote management method is used, and the format in the Data data field is used.
其中:  among them:
1、 OUI为供应商唯一标识, 3个字节;  1. OUI is the unique identifier of the supplier, 3 bytes;
2、 Code为操作码, 1个字节, 例如用于表示当前操作是设置 /获取请求 /响应;  2, Code is the opcode, 1 byte, for example, to indicate that the current operation is to set / get the request / response;
3、 Type为操作类型, 1个字节, 例如可以表示当前对哪种属性进行操 作, 例如对以太网口或者 CATV口等;  3. Type is the operation type, 1 byte. For example, it can indicate which attribute is currently operated, such as Ethernet port or CATV port.
4、 Port为端口编号, 1个字节, 例如以太网端口 1 , 2等;  4, Port is the port number, 1 byte, such as Ethernet port 1, 2, etc.;
5、 Variable Container为 OAM帧中携带的变量,一个 branch/leaf与一个 MIB对象——对应 (对于对应方式标准中不存在的由各自自定义) ;  5. 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);
6、 Width和 Value同标准中的定义一致;  6, Width and Value are consistent with the definition in the standard;
如图 10所示,举例采用另一种 ONU远程管理的方式, DATA数据字段 中的格式。 As shown in FIG. 10, another ONU remote management method is adopted, and the DATA data field is used. The format in .
其中:  among them:
1、 OUI为供应商唯一标识, 3个字节;  1. OUI is the unique identifier of the supplier, 3 bytes;
2、 Code为操作码, 1个字节, 例如用于表示当前网管发出的 SNMP操 作, 例如, 如下表;  2, 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;
Figure imgf000012_0001
Figure imgf000012_0001
3、 MIB Variable Container为 OAM帧中携带的 MIB对象, 一个对象与 一个 MIB Variable Container对应, 长度不定, 其中包含 OID (对象标识定 义) width、 MIB OID、 Width以及 Value; 其中 OID width为 MIB OID的长 度, OID中的每个节点用 2个字节来表示; MIB OID为 MIB对象的标识符 ( 如果不是标量则还包含索引 ) ; 例如某个 MIB 对象为: 1.3.6.1.4.1.3902.1012.2.3.3.1 , 贝' J OID width为 0x18 ( 12 χ 2=24 ) , MIB OID 为 0x0001— 0003— 0006— 0001— 0004— 0001— 0Be—03f4— 0002— 0003— 0003— 0001; Width和 Value同标准中的定义一致。  3. The MIB Variable Container is a MIB object carried in an OAM frame, and an object corresponds to a MIB Variable Container, and the length is indefinite, including an OID (object identifier definition) width, MIB OID, Width, and Value; wherein the OID width is MIB OID Length, each node in the OID is represented by 2 bytes; MIB OID is the identifier of the MIB object (or index if it is not a scalar); for example, a MIB object is: 1.3.6.1.4.1.3902.1012.2.3 .3.1 , Bay ' J OID width is 0x18 ( 12 χ 2=24 ) , MIB OID is 0x0001— 0003— 0006— 0001— 0004— 0001— 0Be—03f4— 0002— 0003— 0003— 0001; Width and Value are the same as standard The definitions are the same.
以上方式, 仅是示例性的, 并非用于限制本发明, 本领域技术人员应当 了解其他的变化形式也是可行的。 工业实用性 针对 EPON系统中一个 OLT下带多个 ONU的特点, 如果采用通常的 SNMP做法, 每个 ONU实现一个 AGENT (网管代理) , 直接将网管管理 信息发送到 ONU, 这样将会占用大量的 IP地址, 无论对公网还是私网的 IP 地址来说均是一种巨大的浪费。本发明实现了对光网络单元的统一管理, 节 省了大量的 IP地址资源。 由于在 OLT侧采用 SNMP协议进行管理, 支持任 何标准的 MIB对象管理, SNMP和 MIB对象均为标准的, 便于实现不同的 产商之间的设备的统一管理, 当业务实现互连互通后, 网管也有可能实现统 一管理, 以及易于实现对新增功能的扩充。 The above manners are merely exemplary and are not intended to limit the invention, and those skilled in the art will appreciate that other variations are also possible. Industrial applicability For the characteristics of multiple ONUs in an OLT in an EPON system, if the normal SNMP method is adopted, 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.

Claims

权 利 要 求 书 Claim
1、 一种以太网无源光网络系统中光网络单元的远程管理方法, 所述以 太网无源光网络系统包括支持简单网络管理协议标准的网管单元,至少一个 光线路终端及其下辖的多个光网络单元,其特征在于, 所述方法包括如下步 骤:  A remote management method for an optical network unit in an Ethernet passive optical network system, the Ethernet passive optical network system comprising a network management unit supporting a simple network management protocol standard, at least one optical line terminal and its underlying A plurality of optical network units, wherein the method comprises the following steps:
网管单元向光线路终端设备发送简单网络管理协议请求包,该请求包中 包含有管理信息以及该管理信息所欲管理的光网络单元编号;  The network management unit sends a simple network management protocol request packet to the optical line terminal device, where the request packet includes management information and an optical network unit number to be managed by the management information;
在光线路终端侧设备上,由一个简单网络管理协议代理将收到的所述协 议请求包解析为多个管理信息库对象,并在其中确定对其下辖的远程光网络 单元操作的管理信息库对象;  On the optical line terminal side device, the received protocol request packet is parsed into a plurality of management information base objects by a simple network management protocol proxy, and management information of the remote optical network unit operations under its jurisdiction is determined therein. Library object
光线路终端根据协议请求包携带的光网络单元编号,检查其下辖的该光 网絡单元是否支持远程管理, 如果支持, 则将管理信息库对象及其属性封装 入一个操作维护管理帧中, 发送至该光网络单元;  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;
该光网络单元解析接收到的该操作维护管理帧,从中提取出管理信息库 对象, 并确定支持所述提取出的管理信息库对象;  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;
光网络单元在本地实现对所述管理信息库对象的操作,并向其所属的光 线路终端回送一个管理响应帧, 其中携带有实际操作返回的结果;  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;
所述光线路终端将所述实际操作返回的结果放入简单网络管理协议响 应包中回送给网管单元。 '  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. '
2、 如权利要求 1所述的方法, 其特征在于, 还包括如下步驟: 在光线路终端侧,由光线路终端组装一个操作维护管理帧发送给其下辖 的光网络单元, 要求该光网络单元确认是否支持远程管理;  2. The method according to claim 1, further comprising the steps of: assembling an operation and maintenance management frame by the optical line terminal to the optical network unit under the optical line terminal on the optical line terminal side, requesting the optical network The unit confirms whether remote management is supported;
该光网络单元根据自身是否支持远程管理,向光线路终端回送一个响应 帧, 携带有是否支持的确认信息;  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;
光线路终端解析该接收到的响应帧,确认并记录该光网络单元是否支持 远程管理。  The optical line terminal parses the received response frame, confirms and records whether the optical network unit supports remote management.
3、 如权利要求 1所述的方法, 其特征在于, 还包括如下步骤: 当光网络单元检测到自身发生异常时,该异常信息封装入一个操作维护 管理帧中, 发送至其所属的光线路终端; 3. The method according to claim 1, further comprising the steps of: 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;
所述光线路终端将接收到的操作维护管理帧中的信息转化为简单网络 管理协议陷阱包上报给网管单元。  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.
4、 如权利要求 1所述的方法, 其特征在于, 所述光线路终端从解析出 的多个管理信息库对象中确定对其下辖的远程光网络单元操作的管理信息 库对象步驟,对于不是对远程光网絡单元进行操作的管理信息库对象, 则由 光线路终端在本地进行处理。  The method according to claim 1, wherein the optical line terminal determines, from the parsed plurality of management information base objects, a management information base object operation for the remote optical network unit under its jurisdiction, The management information base object that is not operating on the remote optical network unit is processed locally by the optical line terminal.
5、 如权利要求 1所述的方法, 其特征在于, 所述光线路终端检查其下 辖的该光网络单元是否支持远程管理步骤,如果不支持,则返回给网管单元 一个光网絡单元不支持远程管理码。  The method according to claim 1, wherein the optical line terminal checks whether the optical network unit under its jurisdiction supports a remote management step, and if not, returns to the network management unit that an optical network unit does not support Remote management code.
6、 如权利要求 1所述的方法, 其特征在于, 所述光线路终端将管理信 息库对象及其属性封装入一个操作维护管理帧中发送至该光网络单元步骤, 进一步包括如下步骤:  The method of claim 1, wherein the optical line terminal encapsulates the management information base object and its attributes into an operation and maintenance management frame and sends the method to the optical network unit, and further includes the following steps:
启动一个定时器, 如果定时器到时, 还没有收到该光网络单元的响应, 则返回给网管单元一个光网络单元响应超时码。  A timer is started. If the response of the optical network unit has not been received after the timer expires, an optical network unit response timeout code is returned to the network management unit.
7、 如权利要求 1所述的方法, 其特征在于, 所述光线路终端将管理信 息库对象及其属性封装入一个操作维护管理帧中的步骤,是通过对标准的操 作维护管理帧的扩展,或者对组件操作维护管理协议数据单元、组件消息类 型长度值和组件事件类型长度值进行扩展来进行封装的。  7. The method according to claim 1, wherein the step of encapsulating the management information library object and its attributes into an operation and maintenance management frame by the optical line terminal is to extend the management frame by standard operation and maintenance. Or extend the component operation and maintenance management protocol data unit, component message type length value, and component event type length value for encapsulation.
8、 如权利要求 1所述的方法, 其特征在于, 所述光网络单元解析接收 到的该操作维护管理帧,从中提取出管理信息库对象, 并确定支持所述提取 出的管理信息库对象步驟,如果该光网络单元不支持提取出的管理信息库对 象, 则直接回送一个响应帧给光线路终端,其中携带有不支持该管理信息库 对象的信息。  8. The method according to claim 1, wherein 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 database object. Step: If the optical network unit does not support the extracted management information base object, directly send a response frame to the optical line terminal, where the information that does not support the management information base object is carried.
9、 如权利要求 2所述的方法, 其特征在于, 所述由光线路终端组装一 个格式的操作维护管理帧发送给其下辖的光网络单元步驟,进一步包括如下 步骤: 设置一个定时器与一个计数器, 等待该光网络单元的响应,如果定时器 超时后还没有收到响应,则再次发送该操作维护管理帧,继续要求该光网络 单元确认是否支持远程管理, 并将定时器复位、 计数器加 1; 如果计数器达 到预定次数还没有收到该光网络单元的响应,则确定该光网络单元不支持远 程管理。 The method according to claim 2, wherein the step of assembling an operation and maintenance management frame of a format by the optical line terminal to the optical network unit under its control further comprises the following steps: Setting a timer and a counter, waiting for the response of the optical network unit, if the response has not been received after the timer expires, sending the operation and maintenance management frame again, and continuing to request the optical network unit to confirm whether to support remote management, and The timer is reset and the counter is incremented by one; if the counter has not received the response of the optical network unit after reaching the predetermined number of times, it is determined that the optical network unit does not support remote management.
10、 如权利要求 3所述的方法,其特征在于,所述光线路终端将接收到 的操作维护管理帧中的信息转化为简单网络管理协议陷阱包上报给网管单 元步骤, 进一步包括如下步骤:  The method of claim 3, wherein the step of converting the information in the received operation and maintenance management frame into the simple network management protocol trap packet and reporting the packet to the network management unit further comprises the following steps:
光线路终端发送一个响应帧给该光网络单元,其中携带有上报成功的信  The optical line terminal sends a response frame to the optical network unit, where the message carrying the successful report is carried.
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