WO2012097538A1 - 一种实现全保护方式的方法及系统 - Google Patents

一种实现全保护方式的方法及系统 Download PDF

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Publication number
WO2012097538A1
WO2012097538A1 PCT/CN2011/071778 CN2011071778W WO2012097538A1 WO 2012097538 A1 WO2012097538 A1 WO 2012097538A1 CN 2011071778 W CN2011071778 W CN 2011071778W WO 2012097538 A1 WO2012097538 A1 WO 2012097538A1
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Prior art keywords
onu
olt
standby
primary
switching
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PCT/CN2011/071778
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English (en)
French (fr)
Inventor
耿丹
何苑凌
张伟良
臧美燕
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中兴通讯股份有限公司
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Publication of WO2012097538A1 publication Critical patent/WO2012097538A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03Arrangements for fault recovery
    • H04B10/032Arrangements for fault recovery using working and protection systems
    • 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
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0079Operation or maintenance aspects
    • H04Q2011/0081Fault tolerance; Redundancy; Recovery; Reconfigurability

Definitions

  • the present invention relates to passive optical network (PON) technology, and more particularly to a method and system for implementing a full protection mode.
  • PON passive optical network
  • GPON Gigabit-Capable Passive Optical Network
  • EPON Ethernet Passive Optical Network
  • the PON is composed of an optical line terminal (OLT) of the office side, an optical network unit (ONU) of the user side, and an optical network unit (ONU).
  • ODN Optical Distribution Network
  • ODN optical Distribution Network
  • the ODN consists of passive optical components such as single mode fiber, optical splitter, and optical connector.
  • the ODN provides optical transmission media for the physical connection between the OLT and the ONU.
  • the data transmission in the downlink direction (from the OLT to the ONU) is broadcasted.
  • Each ONU receives all the frames, and then according to the ONU identifier (ONU-ID) and the GPON encapsulation mode port identifier (GEM-Port lD). , PONID, Logical Link Identity ) to get your own frame.
  • ONU-ID ONU identifier
  • GEM-Port lD GPON encapsulation mode port identifier
  • PONID Logical Link Identity
  • FIG. 2a is a schematic diagram of a passive optical network topology structure in a full protection mode in an existing PON system
  • FIG. 2b is another passive optical network topology in a full protection mode in the existing PON system.
  • Schematic diagram, as shown in Fig. 2a and Fig. 2b, OLT1 and OLT2 are respectively connected to two 1:N splitters, each of which is connected to each ONU through a fiber in the downstream direction, and two ONUs at each ONU, respectively The main ONU and the standby ONU are connected; the OLT 1 is connected to each main ONU through the optical splitter 1, and the OLT 2 is connected to each standby ONU through the optical splitter 2.
  • the OLT1 and the OLT2 can be two independent OLTs, as shown in Figure 2a, or two PON ports of the OLT, as shown in Figure 2b.
  • the OLT1 performs communication with all the active ONUs.
  • the OLT2 and all the standby ONUs perform service communication; if the optical splitter 1 If a branch fiber is interrupted, or a primary ONU fails, the OLT2 performs service communication with the interrupted branch fiber or the standby ONU corresponding to the failed ONU. In this way, full protection of the OLT, ONU and each fiber in the PON system is realized.
  • each primary ONU detects a downlink signal interruption or receives a signal from the primary OLT.
  • the uplink service is switched to the standby ONU, and the standby ONU communicates with the OLT2.
  • the failure notification method uses the primary OLT to send a switching command to the primary ONU, if the primary link cannot perform downlink communication, the switching command sent by the primary OLT to the primary ONU cannot be received, then the primary ONU is not received. It can only rely on self-detection of the line fault after switching, this process can not meet the time-sensitive industry The need for rapid recovery after the interruption. Summary of the invention
  • the main object of the present invention is to provide a method and system for implementing a full protection mode, which can shorten the switching time and meet the need for rapid recovery after a time-sensitive service interruption.
  • a method of implementing a full protection method including:
  • the standby OLT is notified;
  • the standby OLT sends a switching command to the standby ONU.
  • the ONU performs the switching after receiving the switching command.
  • the notification standby OLT includes:
  • the primary OLT When the primary OLT detects an uplink fault or the primary OLT itself fails, the primary OLT sends a fault notification to the standby OLT to notify the backup OLT to initiate a switchover; or, the network management system sends a fault notification to the standby OLT. To notify the standby OLT to initiate a switchover to the standby ONU.
  • the sending, by the standby OLT, a switching command to the standby ONU includes:
  • the standby OLT manages and maintains a PLOAM message, or an ONU management control interface OMCI message, or an extended operation management and maintenance eOAM message, or an extended MAC layer control Extension MAC control message to send a switching command to the standby ONU through physical layer operation management.
  • the switching includes:
  • the standby ONU switches the uplink service sent by the primary ONU to the standby ONU, and sends the uplink service to the standby OLT through the standby ONU.
  • the primary ONU and the standby ONU are two logical ONUs located in the same ONU; or, two PON ports belonging to the same ONU;
  • two logical ONUs or two PON ports of the same ONU have their own
  • the optical module and the medium are connected to the control chip and managed by a common CPU.
  • a system for implementing a full protection mode includes at least a primary OLT, a standby OLT, a primary ONU, and a standby ONU, where
  • the primary OLT is configured to notify the standby OLT when an uplink fault is detected or the primary OLT itself fails.
  • the standby OLT is configured to receive a notification from the primary OLT and send a switching command to the standby ONU.
  • the primary ONU is used to receive and transmit service data between the primary OLT and the primary OLT before the switching occurs;
  • the standby ONU is configured to receive a switching command from the standby OLT for switching, and the uplink service sent by the primary ONU is switched to the standby ONU and sent to the standby OLT through the standby ONU.
  • the primary ONU and the standby ONU are two logical ONUs located in the same ONU; or, two PON ports belonging to the same ONU;
  • the two PON ports of the two logical ONUs or the same ONU have their own optical modules and media access control chips, and are managed by a common CPU.
  • the primary OLT in the PON system notifies the standby by the standby OLT when detecting that the trunk optical fiber or the branch optical fiber in the primary path is disconnected or the primary OLT fails.
  • the ONU performs the switching.
  • the primary ONU can only rely on the self-detection of the line fault to perform the switching, thereby shortening the ONU switching time and ensuring the time in the PON system.
  • the timely transmission of sensitive services enables the ONU and OLT to achieve rapid communication recovery and improve the service quality of the PON system.
  • FIG. 1 is a schematic diagram of a topology of an existing PON system
  • FIG. 2b is a schematic diagram of another passive optical network topology structure in a full protection mode in the existing PON system.
  • FIG. 3 is a flow chart of a method for implementing a full protection mode according to the present invention. detailed description
  • FIG. 3 is a flowchart of a method for implementing a full protection mode according to the present invention. As shown in FIG. 3, the method includes the following steps: Step 300: When the primary OLT detects an uplink fault or the primary OLT itself fails, the standby OLT is notified.
  • the active OLT when the active OLT detects the uplink fault or the primary OLT itself fails, the active OLT can directly send a fault notification to the standby OLT to notify the backup OLT to initiate a switchover to the standby ONU, or through the network management system.
  • the standby OLT sends a fault notification to notify the standby OLT to initiate a switchover to the standby ONU.
  • Step 301 The standby OLT sends a switching command to the standby ONU, and the ONU performs the switching after receiving the switching command.
  • the standby OLT may pass a physical layer operation management and maintenance (PLOAM) message, or an ONU management control interface (OMCI) message, or an extended operation management and maintenance (eOAM) message, or an extended MAC layer control message.
  • PLOAM physical layer operation management and maintenance
  • OMCI ONU management control interface
  • eOAM extended operation management and maintenance
  • the standby ONU After receiving the switchover command, the standby ONU switches the uplink service sent by the primary ONU to the standby ONU and sends it to the standby OLT through the standby ONU.
  • the primary ONU and the standby ONU are two logical ONUs located inside the same ONU, or two PON ports belonging to the same ONU.
  • the two logical ONUs or the two PON ports of the same ONU each have their own optical modules and media access control chips, and are managed by a common CPU.
  • the active OLT in the PON system detects the main light in the main path.
  • the standby OLT is notified by the standby OLT to perform the switchover. This prevents the primary ONU from relying on the self-detected line when the primary link cannot be used for downlink communication.
  • the ONU switching time is shortened, and the timely transmission of time sensitive services in the PON system is ensured, so that the ONU and the OLT realize fast communication recovery and improve the service quality of the PON system.
  • the system of the present invention further provides a system for implementing a full protection mode, including at least a primary OLT, a standby OLT, a primary ONU, and a standby ONU, where
  • the primary OLT is configured to notify the standby OLT when an uplink fault is detected or the primary OLT itself fails.
  • the standby OLT is configured to receive a notification from the primary OLT and send a switching command to the standby ONU.
  • the primary ONU is used to receive and transmit service data between the primary OLT and the primary OLT before the switching occurs;
  • the standby ONU is configured to receive a switching command from the standby OLT for switching, and the uplink service sent by the primary ONU is switched to the standby ONU and sent to the standby OLT through the standby ONU.
  • the OLT 1 is connected to all the main ONUs through the optical splitter 1
  • the OLT 2 is connected to all the standby ONUs through the optical splitter 2.
  • the ONU registration activation and the transmission of service data between the OLT and the ONU are performed between the OLT1 and the primary ONU according to the prior art in the GPON or the GPON-based next-generation PON.
  • the process of restoring communication between the OLT and the ONU includes:
  • the OLT1 when the OLT1 detects that the uplink frame of some or all of the active ONUs is lost or the uplink signal is lost, the OLT1 sends a fault notification to the OLT2.
  • the fault may be reported to the network management system by using the OLT1. Sent by the network management system to OLT2, and OLT2 sends a failure notification;
  • the OLT1 when the OLT1 fails, the OLT1 sends a failure notification to the OLT2, so that the OLT2 notifies all the ONUs to perform the switching; or, the OLT1 reports its own fault to the network management system, and then the network management system sends a failure notification to the OLT2, so that the OLT2 notifies all the ONUs. Switched.
  • the OLT2 sends a PLOAM message (or an OMCI message, or an eOAM message, or an Extension MAC control message) to the standby ONU of the ONU1 to notify the standby ONU to perform the switching;
  • a PLOAM message or an OMCI message, or an eOAM message, or an Extension MAC control message
  • the standby ONU of the ONU1 performs the switching, and the uplink service to be sent by the primary ONU of the ONU1 is switched to the standby ONU, and is sent to the uplink bandwidth allocated by the OLT2.
  • the primary ONU and the standby ONU are two logical ONUs located inside the same ONU, or two PON ports belonging to the same ONU.
  • the two logical ONUs or the two PON ports of the same ONU each have their own optical modules and media access control chips, and are managed by a common CPU.
  • This embodiment is applicable to GPON systems, EPON systems, and next-generation PON systems based on GPON technology or EPON technology, such as XG PON systems and 10G EPON systems.

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

Abstract

本发明提供了一种实现全保护方式的方法及系统,无源光网络(PON)系统中的主用光线路终端(OLT)在检测到主用通路中的主干光纤或分支光纤断开、或者主用OLT发生故障的情况下,通过备用OLT通知备用光网络单元(ONU)进行倒换,这样,避免了主用链路无法进行下行通信时,主用ONU只能依靠自行检测到线路故障后进行倒换的情况,从而缩短了ONU倒换的时间,保证了PON系统中的时间敏感业务的及时发送,使得ONU和OLT实现了通信的快速恢复,提高了PON系统的服务质量。

Description

一种实现全保护方式的方法及系统 技术领域
本发明涉及无源光网络(PON )技术, 尤其涉及一种实现全保护方式 的方法及系统。 背景技术
吉比特无源光网络( GPON , Gigabit-Capable Passive Optical Network ) 技术和以太网无源光网络( EPON , Ethernet Passive Optical Network )是 PON 家族中两个重要的技术分支, 和其它 PON技术类似, GPON和 EPON也是釆 用点到多点拓朴结构的无源光接入技术。
图 1为现有 PON系统的拓朴结构示意图, 如图 1所示, PON由局侧的光 线路终端( OLT, Optical Line Terminal )、用户侧的光网络单元( ONU, Optical Network Unit ) 以及光分配网络 ( ODN, Optical Distribution Network ) 如分 光器组成, 通常釆用点到多点的网络结构。 ODN由单模光纤、 光分路器、 光连接器等无源光器件组成, ODN为 OLT和 ONU之间的物理连接提供光传 输媒质。
在 PON系统中, 下行方向(由 OLT到 ONU)的数据传输釆用广播方式, 每个 ONU分别接收所有的帧, 再根据 ONU标识( ONU-ID )、 GPON封装 模式端口标识(GEM-Port lD, GPON Encapsulation Mode-Port Identity ), 和 分配标识 (Alloc-ID, Allocation- Identity ), 媒质接入控制地址(MAC ID , Medium Access Control ID )或者還辑链路标 i只 ( LLID , Logical Link Identity ) 来获取属于自己的帧。 对于上行方向(从 ONU到 OLT )的数据传输, 由于 各个 ONU需要共享传输媒质, 因此, 各个 ONU应该在 OLT安排给自己的 时隙内传输上行数据。各个 ONU与 OLT之间的距离不同,为防止各个 ONU 发送的上行数据同时到达 OLT, OLT需要对处于注册激活阶段的 ONU进行 测距以实现上行传输同步。
在无源光网络的部署应用中, 有部分用户需要较高的安全性, 希望运 营商能够提供一种保障机制来确保其业务通路不中断, 或者次一级的要求 是, 能够在业务通路中断后快速恢复。 这就对承载用户业务运行的无源光 网络提出了保护通路和快速切换通路的要求。
图 2a为现有 PON系统中的一种全保护方式的一种无源光网络拓朴结 构示意图, 图 2b为现有 PON系统中的一种全保护方式的另一种无源光网 络拓朴结构示意图, 如图 2a和图 2b所示, OLT1和 OLT2分别连接到两个 1 : N的分光器,每个分光器下行方向分别通过光纤连接到各 ONU,各 ONU 处有两个 ONU, 分别为主用 ONU和备用 ONU; OLT1通过分光器 1与各 主用 ONU相连, OLT2通过分光器 2与各备用 ONU相连。 其中, OLT1和 OLT2可以是两个独立的 OLT, 如图 2a所示, 也可以是 OLT的两个 PON 口,如图 2b所示。初始状态时, OLT1和所有主用 ONU之间进行业务通信, 当 OLT1出现故障或者 OLT1与分光器 1之间的光纤中断后, OLT2和所有 备用 ONU之间进行业务通信; 如果分光器 1下的某个分支光纤中断, 或者 某个主用 ONU 出现故障, 则由 OLT2 与中断的分支光纤或者出现故障的 ONU处对应的备用 ONU进行业务通信。通过上述方式实现了对 PON系统 中的 OLT、 ONU和每段光纤的全保护。
在现有全保护方式中, 当 OLT1与分光器 1之间的光纤中断后, 或者, 分光器 1下的某个分支光纤中断,各个主用 ONU检测到下行信号中断或者 收到来自主用 OLT的倒换命令后进行倒换, 将自身的上行业务倒换到备用 ONU, 备用 ONU与 OLT2之间进行业务通信。 但是, 当故障通知方法釆用 主用 OLT向主用 ONU发送倒换命令时, 如果主用链路无法进行下行通信, 主用 OLT发送给主用 ONU的倒换命令无法收到, 那么, 主用 ONU就只能 依靠自行检测到线路故障后进行倒换, 这个过程是不能满足时间敏感的业 务中断后需要快速恢复的需求的。 发明内容
有鉴于此, 本发明的主要目的在于提供一种实现全保护方式的方法及 系统, 能够缩短倒换时间, 满足时间敏感的业务中断后需要快速恢复的需 求。
为达到上述目的, 本发明的技术方案是这样实现的:
一种实现全保护方式的方法, 包括:
主用 OLT检测到上行线路故障或者主用 OLT自身发生故障时,通知备 用 OLT;
备用 OLT向备用 ONU发送倒换命令,ONU收到倒换命令后进行倒换。 所述通知备用 OLT包括:
主用 OLT在检测到上行线路故障或者主用 OLT自身发生故障时,向所 述备用 OLT发送故障通知, 以通知备用 OLT向备用 ONU发起倒换; 或者, 通过网管系统向所述备用 OLT发送故障通知,以通知备用 OLT向备用 ONU发起倒换。
所述备用 OLT向备用 ONU发送倒换命令包括:
所述备用 OLT通过物理层操作管理维护 PLOAM消息、 或 ONU管理 控制接口 OMCI消息, 或扩展操作管理维护 eOAM消息, 或扩展 MAC层 控制 Extension MAC control消息向备用 ONU发送倒换命令。
所述 ONU收到倒换命令后进行倒换包括:
所述备用 ONU将通过主用 ONU发送的上行业务倒换到备用 ONU上, 通过备用 ONU发送给所述备用 OLT。
所述主用 ONU和备用 ONU为位于同一个 ONU内部的两个逻辑 ONU; 或者, 为属于同一个 ONU的两个 PON口;
其中, 两个逻辑 ONU或同一个 ONU的两个 PON口,分别具有各自的 光模块和媒质接入控制芯片, 并由共同的 CPU进行管理。
一种实现全保护方式的系统,至少包括主用 OLT、备用 OLT、主用 ONU、 备用 ONU, 其中,
主用 OLT,用于在检测到上行线路故障或者主用 OLT自身发生故障时, 通知备用 OLT;
备用 OLT, 用于接收来自主用 OLT的通知, 向备用 ONU发送倒换命 令;
主用 ONU,用于在倒换发生之前接收和发送和主用 OLT之间的业务数 据;
备用 ONU, 用于接收来自备用 OLT的倒换命令进行倒换,将通过主用 ONU发送的上行业务倒换到备用 ONU上,通过备用 ONU发送给备用 OLT。
所述主用 ONU和备用 ONU为位于同一个 ONU内部的两个逻辑 ONU; 或者, 为属于同一个 ONU的两个 PON口;
其中, 两个逻辑 ONU或同一个 ONU的两个 PON口,分别具有各自的 光模块和媒质接入控制芯片, 并由共同的 CPU进行管理。
从上述本发明提供的技术方案可以看出, PON系统中的主用 OLT在检 测到主用通路中的主干光纤或分支光纤断开、 或者主用 OLT发生故障的情 况下, 通过备用 OLT通知备用 ONU进行倒换, 这样, 避免了主用链路无 法进行下行通信时,主用 ONU只能依靠自行检测到线路故障后进行倒换的 情况, 从而缩短了 ONU倒换的时间, 保证了 PON系统中的时间敏感业务 的及时发送, 使得 ONU和 OLT实现了通信的快速恢复, 提高了 PON系统 的服务质量。 附图说明
图 1为现有 PON系统的拓朴结构示意图;
图 2a为现有 PON系统中的一种全保护方式的一种无源光网络拓朴结 构示意图;
图 2b为现有 PON系统中的一种全保护方式的另一种无源光网络拓朴 结构示意图。
图 3为本发明实现全保护方式的方法的流程图。 具体实施方式
图 3为本发明实现全保护方式的方法的流程图, 如图 3所示, 包括: 步骤 300: 主用 OLT检测到上行线路故障或者主用 OLT自身发生故障 时, 通知备用 OLT。
本步骤中,主用 OLT在检测到上行线路故障或者主用 OLT自身发生故 障时, 主用 OLT可以直接向备用 OLT发送故障通知, 以通知备用 OLT向 备用 ONU发起倒换, 也可以通过网管系统向备用 OLT发送故障通知, 以 通知备用 OLT向备用 ONU发起倒换。
步骤 301 : 备用 OLT向备用 ONU发送倒换命令, ONU收到倒换命令 后进行倒换。
本步骤中, 备用 OLT可以通过物理层操作管理维护 (PLOAM ) 消息、 或 ONU管理控制接口 (OMCI ) 消息, 或扩展操作管理维护 (eOAM ) 消 息, 或扩展 MAC层控制 ( Extension MAC control ) 消息, 向备用 ONU发 送倒换命令。
备用 ONU收到倒换命令后, 将通过主用 ONU发送的上行业务倒换到 备用 ONU上, 通过备用 ONU发送给备用 OLT。
其中, 主用 ONU和备用 ONU是位于同一个 ONU 内部的两个逻辑 ONU, 或者是属于同一个 ONU的两个 PON口。 其中, 两个逻辑 ONU或 同一个 ONU的两个 PON口, 各自分别具有自己的光模块和媒质接入控制 芯片, 并由共同的 CPU进行管理。
本发明方法中, PON系统中的主用 OLT在检测到主用通路中的主干光 纤或分支光纤断开、 或者主用 OLT发生故障的情况下, 通过备用 OLT通知 备用 ONU 进行倒换, 这样, 避免了主用链路无法进行下行通信时, 主用 ONU 只能依靠自行检测到线路故障后进行倒换的情况, 从而缩短了 ONU 倒换的时间, 保证了 PON 系统中的时间敏感业务的及时发送, 使得 ONU 和 OLT实现了通信的快速恢复, 提高了 PON系统的服务质量。
针对本发明方法, 还提供一种实现全保护方式的系统, 至少包括主用 OLT、 备用 OLT、 主用 ONU、 备用 ONU, 其中,
主用 OLT,用于在检测到上行线路故障或者主用 OLT自身发生故障时, 通知备用 OLT;
备用 OLT, 用于接收来自主用 OLT的通知, 向备用 ONU发送倒换命 令;
主用 ONU,用于在倒换发生之前接收和发送和主用 OLT之间的业务数 据;
备用 ONU, 用于接收来自备用 OLT的倒换命令进行倒换,将通过主用 ONU发送的上行业务倒换到备用 ONU上,通过备用 ONU发送给备用 OLT。
下面结合实施例对本发明方法进行详细描述。
如图 2a或图 2b所示, OLT1通过分光器 1与所有主用 ONU连接, OLT2 通过分光器 2与所有备用 ONU连接。 OLT1和主用 ONU之间按照 GPON 或者基于 GPON技术的下一代 PON中的现有技术进行 ONU的注册激活, 以及 OLT与 ONU之间的业务数据的传输。 当 OLT1与分光器 1之间的光 纤断开时,或者分光器 1与主用 ONU之间的部分或者全部光纤断开, OLT1 检测到部分 ONU或者全部 ONU的上行帧丟失或者上行信号丟失时, OLT 和 ONU之间恢复通信的过程包括:
首先, OLT1在检测到部分或者全部主用 ONU的上行帧丟失或者上行 信号丟失时, OLT1向 OLT2发送故障通知; 这里, 在其它实施例中, 也可 以釆用 OLT1 将故障上报给网管系统, 再由网管系统发送给 OLT2, 并向 OLT2发送故障通知;
另外, 当 OLT1发生故障时, OLT1向 OLT2发送故障通知,以便 OLT2 通知全部 ONU进行倒换; 或者, OLT1将自身故障上报给网管系统, 再由 网管系统向 OLT2发送故障通知 , 以便 OLT2通知全部 ONU进行倒换。
接着, OLT2接收到故障通知后, 向 ONU1的备用 ONU发送 PLOAM 消息 (或 OMCI消息, 或 eOAM消息, 或 Extension MAC control消息), 以通知该备用 ONU进行倒换;
然后, ONU1的备用 ONU接收到来自 OLT2的通知进行倒换的消息后, 进行倒换,将欲通过 ONU1的主用 ONU发送的上行业务倒换到其备用 ONU 上, 并在 OLT2分配的上行带宽内发送给 OLT2。
本实施例中主用 ONU和备用 ONU是位于同一个 ONU内部的两个逻 辑 ONU, 或者是属于同一个 ONU的两个 PON口。 其中, 两个逻辑 ONU 或同一个 ONU的两个 PON口, 各自分别具有自己的光模块和媒质接入控 制芯片, 并由共同的 CPU进行管理。
本实施例适用于 GPON系统、 EPON系统, 以及基于 GPON技术或者 EPON技术的下一代 PON系统, 比如 XG PON系统和 10G EPON系统等。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围, 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等, 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种实现全保护方式的方法, 其特征在于, 包括:
主用光线路终端 OLT检测到上行线路故障或者主用 OLT自身发生故障 时, 通知备用 OLT;
备用 OLT向备用光网络单元 ONU发送倒换命令, ONU收到倒换命令 后进行倒换。
2、根据权利要求 1所述的方法,其特征在于,所述通知备用 OLT包括: 主用 OLT在检测到上行线路故障或者主用 OLT自身发生故障时,向所 述备用 OLT发送故障通知, 以通知备用 OLT向备用 ONU发起倒换; 或者, 通过网管系统向所述备用 OLT发送故障通知,以通知备用 OLT向备用 ONU发起倒换。
3、 根据权利要求 1 所述的方法, 其特征在于, 所述备用 OLT向备用 ONU发送倒换命令包括:
所述备用 OLT通过物理层操作管理维护 PLOAM消息、 或 ONU管理 控制接口 OMCI消息, 或扩展操作管理维护 eOAM消息, 或扩展 MAC层 控制 Extension MAC control消息向备用 ONU发送倒换命令。
4、 根据权利要求 3所述的方法, 其特征在于, 所述 ONU收到倒换命 令后进行倒换包括:
所述备用 ONU将通过主用 ONU发送的上行业务倒换到备用 ONU上, 通过备用 ONU发送给所述备用 OLT。
5、 根据权利要求 4所述的方法, 其特征在于, 所述主用 ONU和备用 ONU为位于同一个 ONU内部的两个逻辑 ONU;或者,为属于同一个 ONU 的两个 PON口;
其中, 两个逻辑 ONU或同一个 ONU的两个无源光网络 PON口,分别 具有各自的光模块和媒质接入控制芯片, 并由共同的 CPU进行管理。
6、 一种实现全保护方式的系统, 其特征在于, 至少包括主用 OLT、 备 用 OLT、 主用 ONU、 备用 ONU, 其中,
主用 OLT,用于在检测到上行线路故障或者主用 OLT自身发生故障时, 通知备用 OLT;
备用 OLT, 用于接收来自主用 OLT的通知, 向备用 ONU发送倒换命 令;
主用 ONU,用于在倒换发生之前接收和发送和主用 OLT之间的业务数 据;
备用 ONU, 用于接收来自备用 OLT的倒换命令进行倒换,将通过主用 ONU发送的上行业务倒换到备用 ONU上,通过备用 ONU发送给备用 OLT。
7、 根据权利要求 6所述的系统, 其特征在于, 所述主用 ONU和备用 ONU为位于同一个 ONU内部的两个逻辑 ONU;或者,为属于同一个 ONU 的两个 PON口;
其中, 两个逻辑 ONU或同一个 ONU的两个 PON口,分别具有各自的 光模块和媒质接入控制芯片, 并由共同的 CPU进行管理。
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