WO2011020361A1 - 一种光接入节点的管理方法及光接入节点 - Google Patents

一种光接入节点的管理方法及光接入节点 Download PDF

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Publication number
WO2011020361A1
WO2011020361A1 PCT/CN2010/073567 CN2010073567W WO2011020361A1 WO 2011020361 A1 WO2011020361 A1 WO 2011020361A1 CN 2010073567 W CN2010073567 W CN 2010073567W WO 2011020361 A1 WO2011020361 A1 WO 2011020361A1
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WIPO (PCT)
Prior art keywords
node
management
ethernet
operation management
maintenance
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PCT/CN2010/073567
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English (en)
French (fr)
Inventor
张德智
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US13/258,044 priority Critical patent/US8737234B2/en
Priority to JP2012525034A priority patent/JP5504345B2/ja
Priority to EP10809494.7A priority patent/EP2466794B1/en
Priority to BR112012003197-0A priority patent/BR112012003197A2/pt
Publication of WO2011020361A1 publication Critical patent/WO2011020361A1/zh

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Classifications

    • 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
    • H04L41/06Management of faults, events, alarms or notifications
    • H04L41/0677Localisation of faults
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing data switching networks
    • H04L43/50Testing arrangements
    • 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
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4641Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • 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
    • H04L41/40Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks using virtualisation of network functions or resources, e.g. SDN or NFV entities
    • 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 relates to the field of optical communications, and in particular to an Optical Line Terminal (OLT) and an Optical Network Unit (ONU) for use in a Passive Optical Network (PON) system.
  • OLT Optical Line Terminal
  • ONU Optical Network Unit
  • PON Passive Optical Network
  • the maintenance method of the Ethernet-based access network is defined in the seventh chapter of the Broadband Forum (BBF) standard TR101, Operation, Administration, Maintenance (OAM).
  • BBF Broadband Forum
  • OFAM Operation, Administration, Maintenance
  • four levels of management domains are defined, namely, Customer (Customer), Carrier (Carrier), and Carrier Internal (Intra).
  • -Carrier Carrier
  • -Carrier End Access Link
  • management end point
  • MIP maintenance intermediate point
  • the Ethernet OAM message of the message is sent, forwarded and replied between the MEP node and the MIP node to assist in locating the area where the specific Ethernet interrupt is faulty.
  • the main functions of the four maintenance management domains defined by the standard are to provide operators with an end-to-end method at the Ethernet level to help operators diagnose and determine link faults.
  • the original access technology is mainly Digital Subscriber Line (DSL) technology
  • the main embodiment of the Access Node is an independent Digital Subscriber Line Access Multiplexer. Referred to as DSLAM) equipment.
  • DSLAM Digital Subscriber Line Access Multiplexer
  • the IEEE 802.3ah standard provides a simple diagnostic method for physical layer faults between OLT and ONU (ie, loopback and bit error rate detection), but at an ether level above the physical layer optical link. At the network level, no specific maintenance management methods have been identified.
  • the OLT cannot actually diagnose and determine the Ethernet layer fault between the OLT and the ONU in the access node through the existing definition. It can only respond passively; even if it is a passive response, the final test result cannot be obtained to determine whether the Ethernet layer link between the OLT and the ONU is working properly.
  • the technical problem to be solved by the present invention is to provide an optical access node management method and an optical access node, which are used to provide an Ethernet layer fault diagnosis mechanism between the OLT and the ONU of the optical access node, and help the operator to implement the connection. Determination of the fault point at the internal service level of the ingress node.
  • the present invention provides a method for managing an optical access node, including: establishing one or more management terminal nodes in an optical access node, and constituting an internal operation management and maintenance domain including the management terminal node; And sending an Ethernet operation management and maintenance message between the management terminal nodes, and carrying the virtual local area network identifier corresponding to the virtual local area network attribute of the user in the operation management and maintenance message according to the virtual local area network attribute of the user.
  • Establishing more than one management terminal node in the optical access node, and forming an internal operation management and maintenance domain including the management terminal node includes: establishing a management terminal node 1 at the network side interface of the optical line terminal, in the optical network unit The user side network interface establishes a management terminal node 2, and constitutes an internal operation management maintenance domain; the step of transmitting an Ethernet operation management maintenance message between the management terminal nodes includes: a node of the management terminal node 1 and the management terminal node 2 As a test origin node, another node is used as a test end node; the test originating node sends an Ethernet operation management maintenance message to the test end node; and the test end node receives the Ethernet operation management maintenance message The test from the node returns a response.
  • the method further includes: if the test originating node receives the test end node to manage the maintenance message for the Ethernet operation After the response, it is determined that the internal operation management maintenance domain is normal in Ethernet connectivity; if the test node does not receive the response of the test end node to the Ethernet operation management maintenance message, determining the internal operation management The Ethernet connectivity in the domain is abnormal.
  • Establishing more than one management terminal node in the optical access node, and forming an internal operation management and maintenance domain including the management terminal node includes: establishing a management terminal node 1 at the network side interface of the optical line terminal, at the optical line terminal The physical interface establishes a management intermediate node; the management terminal node 2 is established on the user side network interface of the optical network unit to form an internal operation management maintenance domain; and the step of transmitting the Ethernet operation management maintenance message between the management terminal nodes includes: One of the terminal node 1 and the management terminal node 2 serves as a test origin node, and the other node serves as a test end node; the test originating node sends an Ethernet operation management maintenance message to the management intermediate node; the management intermediate node receives Returning a response to the test starting node after the Ethernet operation management maintenance message, and forwarding the Ethernet operation management maintenance message to the test end node; the test end node receives the Ethernet operation management and maintenance Returning a response to the test node after the message After the step of sending the Ethernet operation
  • the Ethernet operation management and maintenance message When the optical access node is in a multi-to-one virtual local area network service environment, the Ethernet operation management and maintenance message carries the virtual local area network of the user network interface of the optical network unit in the multi-to-one service virtual local area network service environment.
  • the Ethernet operation management and maintenance message When the optical access node is in a one-to-one virtual local area network service environment, the Ethernet operation management and maintenance message carries the user-side network interface of the optical network unit in the one-to-one service virtual local area network service environment. Virtual LAN ID.
  • the Ethernet operation management maintenance message further indicates that the type of the Ethernet operation management maintenance message is loopback or tracking.
  • the Ethernet operation management and maintenance message further includes a physical layer address of a node that sends the Ethernet operation management maintenance message and a physical layer address of a node that receives the Ethernet operation management maintenance message.
  • the present invention further provides an optical access node, where the optical access node is configured to: the optical access node is configured to: establish one or more management terminal nodes in the optical access node, and Configuring an internal operation management and maintenance domain of the management terminal node, sending an Ethernet operation management and maintenance message between the management terminal nodes, and carrying the operation and maintenance maintenance message in the operation management and maintenance message according to the virtual local area network attribute of the user
  • the virtual local area network identifier corresponding to the virtual local area network attribute.
  • the optical access node is configured to establish one or more management terminal nodes as follows: a management terminal node 1 is established on the network side interface of the optical line terminal, and a management terminal node 2 is established on the user side network interface of the optical network unit, forming an internal An operation management maintenance domain; the management terminal node is configured to: send an Ethernet operation management maintenance message to the management terminal node 2; and after receiving the response of the management terminal node 2 to the Ethernet operation management maintenance message And determining that the Ethernet connectivity in the internal operation management and maintenance domain is normal; if the management terminal node 2 does not receive the response to the Ethernet operation management and maintenance message, determining that the internal operation management maintains the Ethernet connectivity in the domain.
  • the management terminal node 2 is configured to: return a response to the management terminal node after receiving the Ethernet operation management maintenance message.
  • the optical access node is configured to establish one or more management terminal nodes as follows: a management terminal node 1 is established on the network side interface of the optical line terminal, and a management terminal node 2 is established on the user side network interface of the optical network unit;
  • the optical access node is further configured to: establish a management intermediate node at a physical interface of the optical line terminal; the management terminal node 1, the management terminal node 2, and the management intermediate node, constitute an internal operation management Maintaining a domain;
  • the management terminal node is configured to: send an Ethernet operation management maintenance message to the management intermediate node; and receive a response from the management intermediate node but fail to receive a response from the management terminal node 2, Determining that the Ethernet connectivity fault point in the internal operation management maintenance domain exists between the physical interface of the optical line terminal and the user side network interface of the optical network unit;
  • the management intermediate node is configured to: receive the Ethernet
  • the Ethernet operation management and maintenance message When the optical access node is in a multi-to-one virtual local area network service environment, the Ethernet operation management and maintenance message carries the virtual local area network of the user network interface of the optical network unit in the multi-to-one service virtual local area network service environment.
  • the Ethernet operation management and maintenance message When the optical access node is in a one-to-one virtual local area network service environment, the Ethernet operation management and maintenance message carries the user-side network interface of the optical network unit in the one-to-one service virtual local area network service environment. Virtual LAN ID.
  • the Ethernet operation management maintenance message further indicates that the type of the Ethernet operation management maintenance message is loopback or tracking.
  • the Ethernet operation management and maintenance message further includes a physical layer address of a node that sends the Ethernet operation management maintenance message and a physical layer address of a node that receives the Ethernet operation management maintenance message.
  • FIG. 1 is a structural diagram of an optical access node in a passive optical network according to an embodiment
  • FIG. 2 is a flowchart of a method for managing an optical access node in a passive optical network according to an embodiment.
  • the optical access node is composed of an OLT, an ODN, and an ONU.
  • the optical access node is configured to: establish one or more management terminal nodes in the optical access node, and send an Ethernet operation management and maintenance message between the management terminal nodes to determine whether the Ethernet connectivity in the internal operation management and maintenance domain is normal, and according to the user.
  • the virtual local area network attribute carries the virtual local area network identifier corresponding to the virtual local area network attribute of the user in the operation management maintenance message.
  • the optical access node establishes a management terminal node 1 on the network side interface of the optical line terminal, and establishes a management terminal node 2 on the user side network interface of the optical network unit to form an internal operation management and maintenance domain;
  • the optical access node establishes a management intermediate node on the physical interface of the optical line terminal in addition to the management terminal node 1 and the management terminal node 2, and constitutes an internal operation management maintenance domain.
  • the management terminal node sends the Ethernet operation management and maintenance message to the management terminal node 2; in the second embodiment, the management terminal node sends the Ethernet operation management and maintenance message to the management intermediate node;
  • the Ethernet operation management and maintenance message carries the virtual local area network identifier of the user-side network interface of the optical network unit in the multi-to-one service virtual local area network service environment, where the optical access is performed.
  • the Ethernet operation management and maintenance message When the node is in the one-to-one virtual local area network service environment, the Ethernet operation management and maintenance message carries the virtual local area network identifier of the user network interface of the optical network unit in the one-to-one service virtual local area network service environment; After receiving the response from the management terminal node 2 to the Ethernet operation management and maintenance message, it is determined that the Ethernet connectivity in the internal operation management and maintenance domain is normal; the management terminal node 2 is not received in response to the Ethernet operation management and maintenance message. , then determine the internal operation tube Maintenance domain Ethernet connectivity abnormalities. In the second embodiment, after receiving the response of the management intermediate node but not receiving the response of the management terminal node 2, it is determined that the Ethernet connectivity failure point in the internal operation management maintenance domain exists in the physical interface and the optical network of the optical line terminal.
  • the management intermediate node is configured to: after receiving the Ethernet operation management maintenance message, return a response to the management terminal node, and forward the Ethernet operation management and maintenance message to the management terminal node 2.
  • the management terminal node 2 is configured to: return a response to the management terminal node after receiving the Ethernet operation management maintenance message.
  • the method for managing an optical access node in a passive optical network includes the following steps: Step 201: Establish one or more management terminal nodes in an optical access node, and constitute internal operation management including the management terminal node. Maintaining the domain; Step 202: Send an Ethernet operation management and maintenance message between the management terminal nodes, and carry the virtual local area network identifier corresponding to the virtual local area network attribute of the user in the operation management and maintenance message according to the virtual local area network attribute of the user. .
  • Embodiment 1 In the first embodiment, two MEP nodes are established.
  • the method for managing an optical access node in a passive optical network includes the following steps: Step 11: Establish a MEP1 node on the network side interface (ie, the northbound interface) of the OLT.
  • the user-side network interface of the network unit (that is, the south-facing interface) establishes a MEP2 node, and defines the two MEP nodes as management points of independent levels (the hierarchical value points are different from other existing levels), It constitutes an independent internal operation management and maintenance domain, called Intra-AN domain.
  • Step 12 If the OLT needs to detect the connectivity of the Ethernet link in the internal operation management maintenance domain, it will be one of the MEP1 node and the MEP2 node.
  • the other is the test end node; that is, the MEP1 node serves as the test originating node to initiate the test message, and the MEP2 node serves as the test end node; or the MEP2 node serves as the test originating node to initiate the test message, and the MEP1 node serves as the test end node;
  • Step 13 The test node sends an Ethernet OAM message to the test end node.
  • Table 1 Table 1: Structure of the Ethernet OAM message
  • the DA is the MAC address of the interface that sends the message; (in the first embodiment, the MAC address of the user-side network interface of the ONU);
  • the SA is the MAC address of the destination interface of the message; (in this embodiment, the MAC address of the network side interface of the OLT);
  • the VID is the VLAN ID of the user-side network interface of the optical network unit in the VLAN service environment.
  • the Intra-AN MD Level is the specific independent level set by the internal operation management and maintenance domain, depending on the actual situation.
  • the message is an indication of the type of operation of the frame.
  • the ONU is required to perform corresponding processing, and may indicate a loopback or a linkt operation.
  • the VID field is the virtual local area network attribute of the user in the many-to-one (N: 1) VLAN service environment (user) ID: the VLAN ID of the user-side network interface of the corresponding optical network unit. If the application is between the UI port of the ONU and the OLT, the VID field is in one-to-one (1:1).
  • the N:l VLAN refers to a service identifier (S-VLAN) corresponding to multiple users, and each user has its own user identifier (C-VLAN).
  • 1 : 1 VLAN means that each user has their own one S-VLAN ID. If the S-VLAN is used to identify the OAM frame, no specific ONU user can be found in the N:l VLAN application mode. In the above method, the N:1 VLAN and the 1:1 VLAN are distinguished, so that the Ethernet OAM message corresponds to each specific user.
  • the test end node receives the Ethernet operation management and maintenance message and returns a response to the test originating node; the test end node returns the Ethernet OAM response message structure, which may be in the format of Table 2.
  • Table 2 Ethernet OAM Response Message Structure
  • Step 15 If the test node receives the response of the test end node to the Ethernet operation management maintenance message, it determines that the Ethernet connectivity in the internal operation management maintenance domain is normal; if the test node does not receive the test end node, the Ethernet is The response of the network operation management and maintenance message determines that the Ethernet connectivity in the internal operation management and maintenance domain is abnormal. You can further use other methods to perform detailed detection. Specifically, the OLT has a fault or the ONU has a fault.
  • Embodiment 2 In the second embodiment, two MEP nodes are established, namely MEP1 and MEP2, and a MIP node is established in the two MEP nodes.
  • the method for managing the optical access node in the passive optical network includes the following steps: Step 21
  • the MEP1 node is established on the network side interface of the optical line terminal, and the management intermediate node is established on the physical interface of the optical line terminal;
  • MEP2 is established on the user side network interface of the optical network unit, and the created MEP1, MEP2, and MIP are defined as independent level management. Points (hierarchical value points are different from other existing levels), which constitutes a separate administrative domain, named Intra-AN domain.
  • Step 22 If the OLT needs to determine the fault point of the Ethernet link in the internal operation management maintenance domain, one of the MEP1 node and the MEP2 node is used as a test start node, and the other is used as a test end node; that is, the MEP1 node is used as a test node. Initiate a test message, MEP2 node as a test The test end node; or the MEP2 node initiates a test message as a test originating node, and the MEP1 node serves as a test end node; Step 23, the test originating node sends an Ethernet OAM message to the management intermediate node, and the structure of the Ethernet OAM message is as shown in Table 1 above.
  • Step 24 After receiving the Ethernet operation management and maintenance message, the management intermediate node returns a response to the test node, and forwards the Ethernet operation management and maintenance message to the test end node; the test end node receives the Ethernet operation management and maintenance message and then starts the test. The node returns a response; the Ethernet OAM response message returned by the management intermediate node and the test end node may be in the format of Table 2.
  • Step 25 If the test node receives the response of the management intermediate node but does not receive the response of the test end node, it is determined that the Ethernet connectivity fault point in the internal operation management maintenance domain exists in the physical interface and the optical network unit of the optical line terminal. There is no Ethernet connectivity fault between the user-side network interfaces and the OLT. You can use other methods to perform detailed detection. Specifically, there is a fault in the ODN or a fault in the ONU.
  • the present invention provides a diagnostic mechanism for an Ethernet layer fault between an OLT and an ONU within an optical access node, and can overcome the limitation that the traditional Ethernet OAM frame format is not applicable to the TR101 VLAN service model, and uses the present invention.
  • the method does not affect the service operation, and helps the operator to solve the Ethernet maintenance requirements of the optical access node under the TR 101 VLAN architecture.

Abstract

一种光接入节点的管理方法,包括:在光接入节点中建立一个以上管理终端节点,并构成包括所述管理终端节点的内部操作管理维护域;以及在管理终端节点之间发送以太网操作管理维护消息,并根据用户的虚拟局域网属性,在所述操作管理维护消息中携带与所述用户的虚拟局域网属性对应的虚拟局域网标识。本发明还提供了一种光接入节点。本发明提供了光接入节点内部OLT和ONU之间以太网层面故障的诊断机制, 且能够突破传统以太网OAM帧格式单一不适用于TR101 VLAN业务模型的限制,并在使用本发明方法的时候不影响业务运行,帮助运营商解决了在TR101 VLAN构架下光接入节点的以太网维护需求。

Description

一种光接入节点的管理方法及光接入节点
技术领域 本发明涉及光通讯领域, 尤其涉及一种用于无源光网络( Passive Optical Network , 简称 PON )系统中光线路终端( Optical Line Terminal , 简称 OLT ) 和光网络单元( Optical Network Unit , 简称 ONU )之间组成光接入节点时的 管理方法。
背景技术
在宽带论坛( Broadband Forum , 简称 BBF )标准 TR101中第七章节操 作管理维护 ( Operation , Administration , Maintenance, 简称 OAM ) 中定 义了基于以太网的接入网络的维护方法。 在该章节的定义中, 基于 IEEE标 准 802.1ag的方法, 结合接入网络的实际情况, 定义了四个层次的管理域, 分别是用户 (Customer ) , 运营商(Carrier ) , 运营商内部( Intra-Carrier ) 和末端接入链路( Access Link ) 。 在每个域中, 在两个端点之间实现管理终 端节点( maintenance end point , 简称 ΜΕΡ )的功能, 在链路中间实现管理中 间节点 ( maintenance intermediate point , 简称 MIP )的功能。 在 MEP节点和 MIP节点之间进行消息的以太网 OAM消息的发送、 转发和回复, 来协助定 位具体以太网中断故障的区域。 该标准所定义的 4个维护管理域的主要功能是在以太网层面上给运营商 提供一种端到端的方法, 帮助运营商进行链路故障的诊断和确定。 因为原有 接入技术主要是数字用户线路(Digital Subscriber Line, 简称 DSL )技术, 所以接入节点(Access Node )的主要体现就是一个独立的数字用户线路接入 复用 ( Digital Subscriber Line Access Multiplexer, 简称 DSLAM )设备。 在接 入网络中引入 PON技术之后,原本单独的接入节点已经被扩展成一个 OLT、 ONU以及光分配网络(Optical Distribution Network, 简称 ODN )所共同组 成的网络。 因此按照 TR101 中现有的对于以太网无源光网络 ( Ethernet Passive Optical Network, 简称 EPON )而言, IEEE 802.3ah标准提供了 OLT和 ONU 之间物理层故障的简单诊断方法(即, 环回和误码率检测) , 但是在高于物 理层光链路的以太网层面, 没有确定具体的维护管理方法。
发明内容 按照现有的 TR101所定义的 4个维护管理域和定义的维护管理方法, 实 际上 OLT无法通过现有的定义主动进行接入节点中 OLT和 ONU之间以太 网层面故障的诊断和确定, 只能被动响应; 即使是被动响应, 也无法获取最 终的检测结果来判断在 OLT和 ONU之间的以太网层链路是否工作正常。 本发明要解决的技术问题是提供一种光接入节点的管理方法及光接入节 点,用以提供光接入节点内部 OLT和 ONU之间以太网层面故障的诊断机制, 帮助运营商实现接入节点内部业务层面故障点的确定。 为了解决上述问题, 本发明提供了一种光接入节点的管理方法, 包括: 在光接入节点中建立一个以上管理终端节点, 并构成包括所述管理终端 节点的内部操作管理维护域; 以及 在管理终端节点之间发送以太网操作管理维护消息, 并根据用户的虚拟 局域网属性, 在所述操作管理维护消息中携带与所述用户的虚拟局域网属性 对应的虚拟局域网标识。 在光接入节点中建立一个以上管理终端节点, 并构成包括所述管理终端 节点的内部操作管理维护域的步骤包括: 在光线路终端的网络侧接口建立管 理终端节点一, 在光网络单元的用户侧网络接口建立管理终端节点二, 构成 内部操作管理维护域; 在管理终端节点之间发送以太网操作管理维护消息的步骤包括: 将所述 管理终端节点一和管理终端节点二中的一个节点作为测试起节点 , 另一个节 点作为测试终节点; 所述测试起节点向所述测试终节点发送以太网操作管理 维护消息; 以及所述测试终节点接收到所述以太网操作管理维护消息后向所 述测试起节点返回响应。 所述测试起节点向所述测试终节点发送以太网操作管理维护消息的步骤 之后, 所述方法还包括: 如果所述测试起节点收到所述测试终节点对此以太网操作管理维护消息 的响应后, 则判定所述内部操作管理维护域内以太网联通性正常; 如果所述 测试起节点未收到所述测试终节点对此以太网操作管理维护消息的响应, 则 判定所述内部操作管理维护域内以太网联通性异常。 在光接入节点中建立一个以上管理终端节点, 并构成包括所述管理终端 节点的内部操作管理维护域的步骤包括: 在光线路终端的网络侧接口建立管理终端节点一, 在光线路终端的物理 接口建立管理中间节点; 在光网络单元的用户侧网络接口建立管理终端节点 二, 构成内部操作管理维护域; 在管理终端节点之间发送以太网操作管理维护消息的步骤包括: 将所述管理终端节点一和管理终端节点二中的一个节点作为测试起节 点, 另一个节点作为测试终节点; 所述测试起节点向所述管理中间节点发送 以太网操作管理维护消息; 所述管理中间节点接收到所述以太网操作管理维 护消息后向所述测试起节点返回响应, 并向所述测试终节点转发所述以太网 操作管理维护消息; 所述测试终节点接收到所述以太网操作管理维护消息后 向所述测试起节点返回响应。 所述测试起节点向所述管理中间节点发送以太网操作管理维护消息的步 骤之后, 所述方法还包括: 如果所述测试起节点收到所述管理中间节点的响 应但未收到所述测试终节点的响应, 则所述测试起节点判定所述内部操作管 理维护域中以太网连通性故障点存在于光线路终端的物理接口和光网络单元 的用户侧网络接口之间。 当所述光接入节点处于多对一虚拟局域网业务环境中时, 在所述以太网 操作管理维护消息中携带用户在多对一业务虚拟局域网业务环境中光网络单 元用户侧网络接口的虚拟局域网标识; 当所述光接入节点处于一对一虚拟局 域网业务环境中时, 在所述以太网操作管理维护消息中携带用户在一对一业 务虚拟局域网业务环境中光网络单元用户侧网络接口的虚拟局域网标识。 所述以太网操作管理维护消息中还指示此以太网操作管理维护消息的类 型为环回或跟踪。 所述以太网操作管理维护消息中还包括发送此以太网操作管理维护消息 的节点的物理层地址和接收此以太网操作管理维护消息的节点的物理层地 址。
为了解决上述技术问题, 本发明还提供了一种光接入节点, 所述光接入 节点设置为: 所述光接入节点设置为: 在光接入节点中建立一个以上管理终端节点, 并构成包括所述管理终端节点的内部操作管理维护域, 在管理终端节点之间 发送以太网操作管理维护消息, 并根据用户的虚拟局域网属性, 在所述操作 管理维护消息中携带与所述用户的虚拟局域网属性对应的虚拟局域网标识。 所述光接入节点是设置为按如下方式建立一个以上管理终端节点: 在光 线路终端的网络侧接口建立管理终端节点一, 在光网络单元的用户侧网络接 口建立管理终端节点二, 构成内部操作管理维护域; 所述管理终端节点一设置为: 向所述管理终端节点二发送以太网操作管 理维护消息; 以及在收到所述管理终端节点二对此以太网操作管理维护消息 的响应后, 则判定所述内部操作管理维护域内以太网联通性正常; 如果未收 到所述管理终端节点二对此以太网操作管理维护消息的响应, 则判定所述内 部操作管理维护域内以太网联通性异常; 所述管理终端节点二设置为: 接收到所述以太网操作管理维护消息后向 所述管理终端节点一返回响应。 所述光接入节点是设置为按如下方式建立一个以上管理终端节点: 在光 线路终端的网络侧接口建立管理终端节点一, 在光网络单元的用户侧网络接 口建立管理终端节点二; 所述光接入节点还设置为:在光线路终端的物理接口建立管理中间节点; 所述管理终端节点一、 管理终端节点二和管理中间节点, 构成内部操作管理 维护域; 所述管理终端节点一设置为: 向所述管理中间节点发送以太网操作管理 维护消息; 以及在收到所述管理中间节点的响应但未收到所述管理终端节点 二的响应, 则判定所述内部操作管理维护域中以太网连通性故障点存在于光 线路终端的物理接口和光网络单元的用户侧网络接口之间; 所述管理中间节点设置为: 接收到所述以太网操作管理维护消息后向所 述管理终端节点一返回响应, 并向所述管理终端节点二转发所述以太网操作 管理维护消息; 所述管理终端节点二设置为: 接收到所述以太网操作管理维护消息后向 所述管理终端节点一返回响应。 当所述光接入节点处于多对一虚拟局域网业务环境中时, 在所述以太网 操作管理维护消息中携带用户在多对一业务虚拟局域网业务环境中光网络单 元用户侧网络接口的虚拟局域网标识; 当所述光接入节点处于一对一虚拟局 域网业务环境中时, 在所述以太网操作管理维护消息中携带用户在一对一业 务虚拟局域网业务环境中光网络单元用户侧网络接口的虚拟局域网标识。 所述以太网操作管理维护消息中还指示以太网操作管理维护此消息的类 型为环回或跟踪。 所述以太网操作管理维护消息中还包括发送此以太网操作管理维护消息 的节点的物理层地址和接收此以太网操作管理维护消息的节点的物理层地 址。
本发明提供了光接入节点内部 OLT和 ONU之间以太网层面故障的诊断 机制,且能够突破传统以太网 OAM帧格式单一不适用于 TR101 虚拟局域网 ( Virtual Local Area Network, 简称 VLAN )业务模型的限制, 并在使用本发 明方法的时候不影响业务运行,帮助运营商解决了在 TR101VLAN构架下 光 接入节点的以太网维护需求。 附图概述 图 1是实施例的无源光网络中光接入节点的组成结构图; 图 2是实施例的无源光网络中光接入节点的管理方法的流程图。
本发明的较佳实施方式 如图 1所示, 光接入节点由 OLT、 ODN和 ONU构成。 光接入节点设置为: 在光接入节点中建立一个以上管理终端节点, 在管 理终端节点之间发送以太网操作管理维护消息以判断内部操作管理维护域内 以太网联通性是否正常, 并根据用户的虚拟局域网属性, 在操作管理维护消 息中携带与用户的虚拟局域网属性对应的虚拟局域网标识。 实施方式一情况下, 光接入节点在光线路终端的网络侧接口建立管理终 端节点一, 在光网络单元的用户侧网络接口建立管理终端节点二, 构成内部 操作管理维护域; 在实施方式二情况下, 光接入节点除了建立管理终端节点 一和管理终端节点二外, 还在光线路终端的物理接口建立管理中间节点, 构 成内部操作管理维护域。 在实施方式一情况下, 管理终端节点一向管理终端节点二发送以太网操 作管理维护消息; 在实施方式二情况下, 管理终端节点一向管理中间节点发 送以太网操作管理维护消息; 并在此光接入节点处于多对一虚拟局域网业务 环境中时, 在以太网操作管理维护消息中携带用户在多对一业务虚拟局域网 业务环境中光网络单元用户侧网络接口的虚拟局域网标识, 在此光接入节点 处于一对一虚拟局域网业务环境中时, 在以太网操作管理维护消息中携带用 户在一对一业务虚拟局域网业务环境中光网络单元用户侧网络接口的虚拟局 域网标识; 在实施方式一情况下, 在收到管理终端节点二对此以太网操作管 理维护消息的响应后, 则判定内部操作管理维护域内以太网联通性正常; 未 收到管理终端节点二对此以太网操作管理维护消息的响应, 则判定内部操作 管理维护域内以太网联通性异常。 在实施方式二情况下, 在收到管理中间节 点的响应但未收到管理终端节点二的响应, 则判定内部操作管理维护域中以 太网连通性故障点存在于光线路终端的物理接口和光网络单元的用户侧网络 接口之间。 在实施方式一和实施方式二的情况下, 是根据在一定时间内是否收到管 理终端节点二的响应, 来判定内部操作管理维护域内以太网联通性的, 该一 定时间的设置对应于在光节点中的不同的消息流转判定。 不同取值在标准 802.1ag中有部分的建议值,但是并不限于这些建议值,可以根据实际情况在 系统设备上调整设置。 管理中间节点, 在实施方式二情况下, 设置为: 接收到以太网操作管理 维护消息后向管理终端节点一返回响应, 并向管理终端节点二转发以太网操 作管理维护消息。 管理终端节点二设置为: 接收到以太网操作管理维护消息后向管理终端 节点一返回响应。
如图 2所示, 无源光网络中光接入节点的管理方法包括以下步骤: 步骤 201 , 在光接入节点中建立一个以上管理终端节点, 并构成包括所 述管理终端节点的内部操作管理维护域; 步骤 202, 在管理终端节点之间发送以太网操作管理维护消息, 并根据 用户的虚拟局域网属性, 在所述操作管理维护消息中携带与所述用户的虚拟 局域网属性对应的虚拟局域网标识。
下面结合实施例详细说明本发明。 实施例一: 实施例一中建立两个 MEP 节点, 无源光网络中光接入节点的管理方法 包括以下步骤: 步骤 11 , 在 OLT的网络侧接口 (即北向接口 )建立 MEP1节点, 在光 网络单元的用户侧网络接口 (即南向接口 )建立 MEP2节点, 将该两个 MEP 节点定义为独立层级的管理点(层级取值点和其他现有的层级取值都不同) , 构成了一个独立的内部操作管理维护域, 称为 Intra-AN域; 步骤 12, OLT如果需要检测此内部操作管理维护域内的以太网链路的连 通性时 , 将 MEP1节点和 MEP2节点中的一个作为测试起节点 , 另一个作为 测试终节点; 即 MEP1节点作为测试起节点发起测试消息 , MEP2节点作为 测试终节点; 或者 MEP2节点作为测试起节点发起测试消息, MEP1节点作 为测试终节点; 步骤 13 ,测试起节点向测试终节点发送以太网 OAM消息,以太网 OAM 消息的结构如表 1所示: 表 1: 以太网 OAM消息的结构
Figure imgf000010_0001
其中, DA是发送此消息的接口的 MAC地址; (在实施例一中是 ONU 的用户侧网络接口的 MAC地址 ) ;
SA是此消息的目的接口的 MAC地址; (在此实施例一中是 OLT的网 络侧接口的 MAC地址) ;
VID是 VLAN业务环境中光网络单元用户侧网络接口的 VLAN标识; Intra-AN MD Level是此内部操作管理维护域设置成的具体的独立层级, 视实际情况而定;
Message 是标识该帧操作类型的指示, 要求 ONU进行对应的处理, 可 以指示环回 (Loopback )或跟踪 ( Linktrace )操作。 上述 VID字段, 如果应用情况为 ONU的 U I接口和 OLT之间是进行 的是 N:l VLAN业务时, VID字段是在多对一( N: 1 ) VLAN业务环境中用 户的虚拟局域网属性(用户标识)对应的光网络单元用户侧网络接口的 VLAN 标识; 如果应用情况为 ONU的 U I口和 OLT之间是进行的是 1 :1 VLAN业 务时, VID字段是在一对一(1 : 1 ) VLAN业务环境中用户的虚拟局域网属 性 (业务标识 )对应的光网络单元用户侧网络接口的 VLAN标识。 N:l VLAN指的是一个业务标识(S-VLAN )对应于多个用户, 每个用户 有自己的用户标识(C-VLAN ) 。 1 :1 VLAN指的是每一个用户有自己的一个 S-VLAN标识。如果统一釆用 S-VLAN进行标识 OAM帧的话,在 N:l VLAN 的应用模式中, 找不到具体的某一个 ONU用户对应。 上述方法中, 区分 N:l VLAN和 1 :1 VLAN两种情况, 使以太网 OAM消息对应到每个具体用户。 步骤 14,测试终节点接收到以太网操作管理维护消息后向测试起节点返 回响应; 测试终节点返回以太网 OAM响应消息结构可以是表 2的格式。 表 2: 以太网 OAM响应消息结构
Figure imgf000011_0001
表 2中前四个字段与表 1中所示的相同, 第五个字段表示此消息为响应 消息。 步骤 15,如果测试起节点收到测试终节点对此以太网操作管理维护消息 的响应后, 则判定内部操作管理维护域内以太网联通性正常; 如果测试起节 点未收到测试终节点对此以太网操作管理维护消息的响应, 则判定内部操作 管理维护域内以太网联通性异常, 可以进一步釆用其他方法进行细化检测具 体是 OLT存在故障还是 ONU存在故障。
实施例二: 实施例二中建立两个 MEP节点, 即 MEP1和 MEP2, 并在两个 MEP节 点中建立一 MIP节点, 无源光网络中光接入节点的管理方法包括以下步骤: 步骤 21 , 在光线路终端的网络侧接口建立 MEP1节点, 在光线路终端的 物理接口建立管理中间节点; 在光网络单元的用户侧网络接口建立 MEP2 , 将创建的 MEP1、 MEP2和 MIP定义为独立层级的管理点 (层级取值点和其 他现有的层级取值都不同 ) ,这样构成了一个独立的管理域,取名为 Intra-AN 域。 步骤 22, OLT如果需要确定此内部操作管理维护域内以太网链路的故障 点时 , 将 MEP1节点和 MEP2节点中的一个作为测试起节点 , 另一个作为测 试终节点; 即 MEP1节点作为测试起节点发起测试消息, MEP2节点作为测 试终节点; 或者 MEP2节点作为测试起节点发起测试消息, MEP1节点作为 测试终节点; 步骤 23 , 测试起节点向管理中间节点发送以太网 OAM 消息, 以太网 OAM消息的结构如上述表 1所示,且表 1中各字段的意义与步骤 13中相同。 步骤 24 ,管理中间节点接收到以太网操作管理维护消息后向测试起节点 返回响应, 并向测试终节点转发以太网操作管理维护消息; 测试终节点接收 到以太网操作管理维护消息后向测试起节点返回响应; 管理中间节点和测试终节点返回的以太网 OAM响应消息可以是表 2的 格式。
步骤 25,如果测试起节点收到管理中间节点的响应但未收到测试终节点 的响应, 则判定内部操作管理维护域中以太网连通性故障点存在于光线路终 端的物理接口和光网络单元的用户侧网络接口之间,而在 OLT内部不存在以 太网连通性故障, 可以釆用其他方法进行细化检测具体是 ODN存在故障还 是 ONU内部存在故障。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。
工业实用性 本发明提供了光接入节点内部 OLT和 ONU之间以太网层面故障的诊断 机制, 且能够突破传统以太网 OAM帧格式单一不适用于 TR101 VLAN业务 模型的限制, 并在使用本发明方法的时候不影响业务运行, 帮助运营商解决 了在 TR 101 VLAN构架下光接入节点的以太网维护需求。

Claims

权 利 要 求 书
1、 一种光接入节点的管理方法, 包括: 在光接入节点中建立一个以上管理终端节点, 并构成包括所述管理终端 节点的内部操作管理维护域; 以及 在管理终端节点之间发送以太网操作管理维护消息, 并根据用户的虚拟 局域网属性, 在所述操作管理维护消息中携带与所述用户的虚拟局域网属性 对应的虚拟局域网标识。
2、 如权利要求 1所述的管理方法, 其中: 在光接入节点中建立一个以上管理终端节点, 并构成包括所述管理终端 节点的内部操作管理维护域的步骤包括: 在光线路终端的网络侧接口建立管 理终端节点一, 在光网络单元的用户侧网络接口建立管理终端节点二, 构成 内部操作管理维护域;
在管理终端节点之间发送以太网操作管理维护消息的步骤包括: 将所述管理终端节点一和管理终端节点二中的一个节点作为测试起节 点, 另一个节点作为测试终节点; 所述测试起节点向所述测试终节点发送以太网操作管理维护消息; 以及 所述测试终节点接收到所述以太网操作管理维护消息后向所述测试起节 点返回口向应。
3、 如权利要求 2所述的管理方法, 其中: 所述测试起节点向所述测试终节点发送以太网操作管理维护消息的步骤 之后, 所述方法还包括: 如果所述测试起节点收到所述测试终节点对此以太网操作管理维护消息 的响应后, 则判定所述内部操作管理维护域内以太网联通性正常; 如果所述测试起节点未收到所述测试终节点对此以太网操作管理维护消 息的响应, 则判定所述内部操作管理维护域内以太网联通性异常。
4、 如权利要求 1所述的管理方法, 其中: 在光接入节点中建立一个以上管理终端节点, 并构成包括所述管理终端 节点的内部操作管理维护域的步骤包括: 在光线路终端的网络侧接口建立管 理终端节点一, 在光线路终端的物理接口建立管理中间节点; 在光网络单元 的用户侧网络接口建立管理终端节点二, 构成内部操作管理维护域; 在管理终端节点之间发送以太网操作管理维护消息的步骤包括: 将所述 管理终端节点一和管理终端节点二中的一个节点作为测试起节点 , 另一个节 点作为测试终节点; 所述测试起节点向所述管理中间节点发送以太网操作管理维护消息; 所述管理中间节点接收到所述以太网操作管理维护消息后向所述测试起 节点返回响应, 并向所述测试终节点转发所述以太网操作管理维护消息; 所 述测试终节点接收到所述以太网操作管理维护消息后向所述测试起节点返回 口向应。
5、 如权利要求 4所述的管理方法, 其中: 所述测试起节点向所述管理中间节点发送以太网操作管理维护消息的步 骤之后, 所述方法还包括: 如果所述测试起节点收到所述管理中间节点的响应但未收到所述测试终 节点的响应, 则所述测试起节点判定所述内部操作管理维护域中以太网连通 性故障点存在于光线路终端的物理接口和光网络单元的用户侧网络接口之 间。
6、 如权利要求 2或 4所述的管理方法, 其中: 当所述光接入节点处于多对一虚拟局域网业务环境中时, 在所述以太网 操作管理维护消息中携带用户在多对一业务虚拟局域网业务环境中光网络单 元用户侧网络接口的虚拟局域网标识; 当所述光接入节点处于一对一虚拟局 域网业务环境中时, 在所述以太网操作管理维护消息中携带用户在一对一业 务虚拟局域网业务环境中光网络单元用户侧网络接口的虚拟局域网标识。
7、 如权利要求 2或 4所述的管理方法, 其中: 所述以太网操作管理维护消息中还指示此以太网操作管理维护消息的类 型为环回或跟踪。
8、 如权利要求 2或 4所述的管理方法, 其中: 所述以太网操作管理维护消息中还包括发送此以太网操作管理维护消息 的节点的物理层地址和接收此以太网操作管理维护消息的节点的物理层地 址。
9、 一种光接入节点, 其设置为: 在光接入节点中建立一个以上管理终端节点, 并构成包括所述管理终端 节点的内部操作管理维护域, 在管理终端节点之间发送以太网操作管理维护 消息, 并根据用户的虚拟局域网属性, 在所述操作管理维护消息中携带与所 述用户的虚拟局域网属性对应的虚拟局域网标识。
10、 如权利要求 9所述的光接入节点, 其中: 所述光接入节点是设置为按如下方式建立一个以上管理终端节点: 在光 线路终端的网络侧接口建立管理终端节点一, 在光网络单元的用户侧网络接 口建立管理终端节点二, 构成内部操作管理维护域; 所述管理终端节点一设置为: 向所述管理终端节点二发送以太网操作管 理维护消息; 以及在收到所述管理终端节点二对此以太网操作管理维护消息 的响应后, 则判定所述内部操作管理维护域内以太网联通性正常; 如果未收 到所述管理终端节点二对此以太网操作管理维护消息的响应, 则判定所述内 部操作管理维护域内以太网联通性异常;
所述管理终端节点二设置为: 接收到所述以太网操作管理维护消息后向 所述管理终端节点一返回响应。
11、 如权利要求 9所述的光接入节点, 其中: 所述光接入节点是设置为按如下方式建立一个以上管理终端节点: 在光 线路终端的网络侧接口建立管理终端节点一, 在光网络单元的用户侧网络接 口建立管理终端节点二; 以及 所述光接入节点还设置为:在光线路终端的物理接口建立管理中间节点; 所述管理终端节点一、 管理终端节点二和管理中间节点构成内部操作管理维 护域;
所述管理终端节点一设置为: 向所述管理中间节点发送以太网操作管理 维护消息; 以及在收到所述管理中间节点的响应但未收到所述管理终端节点 二的响应, 则判定所述内部操作管理维护域中以太网连通性故障点存在于光 线路终端的物理接口和光网络单元的用户侧网络接口之间; 所述管理中间节点设置为: 接收到所述以太网操作管理维护消息后向所 述管理终端节点一返回响应, 并向所述管理终端节点二转发所述以太网操作 管理维护消息; 所述管理终端节点二设置为: 接收到所述以太网操作管理维护消息后向 所述管理终端节点一返回响应。
12、 如权利要求 10或 11所述的光接入节点, 其中: 当所述光接入节点处于多对一虚拟局域网业务环境中时, 在所述以太网 操作管理维护消息中携带用户在多对一业务虚拟局域网业务环境中光网络单 元用户侧网络接口的虚拟局域网标识; 当所述光接入节点处于一对一虚拟局 域网业务环境中时, 在所述以太网操作管理维护消息中携带用户在一对一业 务虚拟局域网业务环境中光网络单元用户侧网络接口的虚拟局域网标识。
13、 如权利要求 10或 11所述的光接入节点, 其中: 所述以太网操作管理维护消息中还指示此以太网操作管理维护消息的类 型为环回或跟踪。
14、 如权利要求 10或 11所述的光接入节点, 其中: 所述以太网操作管理维护消息中还包括发送此以太网操作管理维护消息 的节点的物理层地址和接收此以太网操作管理维护消息的节点的物理层地 址。
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