WO2012155671A1 - Optical port switchover method and system of optical network unit - Google Patents
Optical port switchover method and system of optical network unit Download PDFInfo
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- WO2012155671A1 WO2012155671A1 PCT/CN2012/072854 CN2012072854W WO2012155671A1 WO 2012155671 A1 WO2012155671 A1 WO 2012155671A1 CN 2012072854 W CN2012072854 W CN 2012072854W WO 2012155671 A1 WO2012155671 A1 WO 2012155671A1
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- optical port
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
- H04B10/272—Star-type networks or tree-type networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
Definitions
- the present invention relates to the field of optical network technologies, and in particular, to an optical port switching method and system for an optical network unit. Background technique
- PON Passive Optical Network
- FTTB Fiber to the Building
- ONU Optical Network Unit
- PLOAM physical layer operation and maintenance
- a Synchronous Digital Hierarchy (SDH) network protection architecture mechanism is adopted in order to implement optical port protection switching of an optical network unit in a Gigabit passive optical network system.
- SDH Synchronous Digital Hierarchy
- an optical network is used.
- the unit and the optical line terminal (OLT) are considered to be peer devices.
- the optical port switching of the optical network unit needs to be performed by K1 or K2 byte coding. The entire operation process is complicated and cannot be well adapted to one.
- the optical line terminal corresponds to a network layout of a plurality of optical network units. Summary of the invention
- the main purpose of the present invention is to provide an optical port switching method and system for an optical network unit, which implements optical port switching of an optical network unit, ensures normal operation of the optical network unit, and simplifies optical port switching. Process.
- the present invention provides an optical port switching method for an optical network unit, where the optical network unit includes a first optical port that is currently a working optical port and a second optical port that is currently a standby optical port, and includes the following steps:
- the first optical port periodically sends status information of the second optical port to the optical line terminal
- the optical line terminal determines, according to the status information of the second optical port, whether the second optical port is currently available;
- the optical line terminal When the second optical port is currently available, the optical line terminal sends an optical port switching instruction to the optical network unit through the first optical port;
- the optical network unit switches the current working optical port to the second optical port according to the optical port switching instruction, and sets the first optical port as the standby optical port.
- the optical line terminal determines whether the first optical port is faulty by the following manner: After receiving the status information of the second optical port, the optical line terminal starts a timing function to determine whether the next time is received within the set time. Status information of the second optical port; if not, it indicates that the first optical port is faulty; if yes, it indicates that the first optical port is normal.
- the state of the second optical port comprises: a state of having a light signal and a state of a lightless signal.
- the optical line terminal determines, according to the status information of the second optical port, whether the second optical port is available:
- the optical line terminal determines, according to the state information of the second optical port, whether the current state of the second optical port is a state with an optical signal
- the status information of the second optical port is status information of the second optical port that is currently received by the optical line terminal.
- the present invention further provides an optical port switching system of an optical network unit, including an optical network unit and an optical line terminal.
- the optical network unit includes a first optical port that is currently a working optical port and is currently in standby. a second optical port of the optical port;
- the first optical port is configured to periodically send the status information of the second optical port to the optical line terminal.
- the optical line terminal is configured to determine, according to the status information of the second optical port, whether the second optical port is currently available. And when the second optical port is currently available, the optical line terminal sends an optical port switching instruction to the optical network unit through the first optical port;
- the optical network unit is configured to switch the current working optical port to the second optical port according to the optical port switching instruction, and the first optical port is a standby optical port.
- the optical line terminal is further configured to: after receiving the status information of the second optical port, start a timing function, and determine whether the status information of the next second optical port is received within the set time, and if not , indicating that the first optical port is faulty; if so, it indicates that the first optical port is normal.
- the optical port switching system of the optical network unit includes: a state of having an optical signal and a state of a non-optical signal.
- the optical line terminal is further configured to determine, according to the state information of the second optical port, whether the current state of the second optical port is a state with an optical signal; and when the current state of the second optical port is a state with an optical signal , indicating that the second optical port is available; when the current state of the second optical port is a state of no light signal, it indicates that the second optical port is unavailable.
- the status information of the second optical port is status information of the second optical port that is currently received by the optical line terminal.
- the optical port switching method and system for the optical network unit provided by the present invention, the optical network unit sends the status information of the standby optical port to the optical line terminal through the working optical port timing, and when the working optical port is faulty, the optical line terminal determines the standby optical port.
- the optical port switching instruction of the optical network unit can be used, and the optical network unit performs the working optical port switching according to the optical port switching instruction, thereby realizing the optical port switching of the optical network unit, ensuring the normal operation of the optical network unit, and simplifying the optical network.
- FIG. 1 is a flow chart of an embodiment of an optical port switching method of an optical network unit according to the present invention
- FIG. 2 is a schematic structural diagram of an optical port switching system of an optical network unit according to an embodiment of the present invention.
- the optical network unit includes a first optical port that is currently a working optical port and a second optical port that is currently a standby optical port.
- the method includes:
- Step S101 The first optical port periodically sends the status information of the second optical port to the optical line terminal.
- Step S103 The optical line terminal sends an optical port switching instruction to the optical network unit through the first optical port.
- Step S104 The optical network unit switches the current working optical port to the second optical port according to the optical port switching instruction, and juxtaposes the first The optical port is an alternate optical port.
- the optical port switching command includes the sequence number of the target optical port, and the optical network unit can find the corresponding target optical port according to the serial number, and switch the working optical port to the target optical port.
- the target optical port number in this embodiment is the serial number of the second optical port.
- a prerequisite for optical port switching is that the first optical port and the second optical port of the optical network unit are respectively registered with the optical line terminal, and are respectively registered successfully. After the optical network unit registers the first optical port and the second optical port successfully, one optical port is selected as the working optical port, and the other is the standby optical port. If the first optical port is selected as the working optical port, select The second optical port is a backup optical port.
- the optical line terminal determines whether the first optical port is faulty by the following manner: After receiving the status information of the second optical port, the optical line terminal starts the timing function. And determining whether the status information of the next second optical port is received within the set time; if not, indicating that the first optical port is faulty; if yes, indicating that the first optical port is normal.
- the failure of the first optical port means that the first optical port cannot send data to the optical line terminal, but the optical line terminal can also send the optical port to the optical network unit through the first optical port. data.
- the state of the second optical port includes: a state of the optical signal and a state of the optical signal.
- the state of the second optical port can be represented by a number, for example, a state in which the second optical port is a light signal is indicated by "1", and a state in which the second optical port is a no-light signal is indicated as "0".
- step S102 is specifically: the optical line terminal determines, according to the state information of the second optical port, whether the current state of the second optical port is a state with an optical signal; If the current state of the optical port is a state with an optical signal, it indicates that the second optical port is available; when the current state of the second optical port is a state of no optical signal, it indicates that the second optical port is unavailable.
- the status information of the second optical port is status information of the second optical port that is currently received by the optical line terminal.
- the optical port switching method of the optical network unit is applicable to a network layout of an optical line terminal corresponding to an optical network unit, and is also applicable to a network layout of an optical line terminal corresponding to multiple optical network units.
- the optical network unit sends the status information of the standby optical port to the optical line terminal through the working optical port timing.
- the optical line terminal determines that the standby optical port can be used to return the light.
- the optical port switching instruction of the network unit the optical network unit performs the working optical port switching according to the optical port switching instruction, thereby realizing the optical port switching of the optical network unit, ensuring The normal operation of the optical network unit simplifies the optical port switching operation process of the optical network unit.
- an embodiment of an optical port switching system 100 for an optical network unit of the present invention including an optical network unit 110 and an optical line termination 120.
- the optical network unit 110 includes a first optical port 111 that is currently a working optical port and a second optical port 112 that is currently a standby optical port.
- the first optical port 111 is configured to periodically send status information of the second optical port 112 to the optical line terminal.
- the optical line terminal 120 is configured to determine, according to the status information of the second optical port 112, whether the second optical port 112 is currently available according to the status information of the second optical port 112; and when the second optical port 112 is currently available, the optical line terminal 120 sends an optical port switching instruction to the optical network unit through the first optical port 111.
- the optical network unit 110 is configured to switch the current working optical port to the second optical port 112 according to the optical port switching command, and juxtapose the first optical port 111 as a backup optical port.
- the optical port switching instruction packet also has a serial number of the target optical port, and the optical network unit can find the corresponding target optical port according to the serial number, and switch the working optical port to the target optical port.
- the target optical port number in this embodiment is the serial number of the second optical port 112.
- a prerequisite for optical port switching is that the first optical port 111 and the second optical port 112 of the optical network unit 110 are respectively registered with the optical line terminal 120, and are respectively registered. success.
- the optical network unit 110 selects one optical port as the working optical port and the other as the standby optical port. If the first optical port 111 is selected as the working optical port, the second optical port 112 is selected as the standby optical port.
- the optical line terminal 120 has a function for starting the timing function after receiving the status information of the second optical port 112, and determining whether the received time is received within the set time.
- the status information of the next second optical port 112, if not, indicates that the first optical port 111 is faulty; if so, it indicates that the first optical port 111 is normal.
- the failure of the first optical port 111 means that the first optical port 111 cannot send data to the optical line terminal 120, but the optical line terminal 120 can also pass through the first optical port 111.
- Optical network unit 110 transmits data.
- the state of the second optical port 112 includes: a state of the optical signal and a state of the optical signal.
- the state of the second optical port 112 can be represented by a numeral, such as "1" indicating that the second optical port 112 is in a state of having an optical signal, and "0" indicating that the second optical port 112 is in a state of no optical signal. .
- the optical line terminal 120 is specifically configured to determine, according to the state information of the second optical port 112, whether the current state of the second optical port 112 is an optical signal. When the current state of the second optical port 112 is a state with an optical signal, it indicates that the second optical port 112 is available; when the current state of the second optical port 112 is a state of no optical signal, it indicates that the second optical port 112 is unavailable. .
- the status information of the second optical port 112 is status information of the second optical port 112 that the optical line terminal 120 has recently received.
- the optical port switching system 100 of the optical network unit is applicable to a network layout of an optical line terminal 120 corresponding to an optical network unit 110, and is also applicable to a network layout of an optical line terminal 120 corresponding to multiple optical network units 110.
- the optical network unit sends the status information of the standby optical port to the optical line terminal 120 through the working optical port timing.
- the optical line terminal 120 determines that the standby optical port is available.
- the optical interface switching instruction of the optical network unit 110 is performed, and the optical network unit 110 performs the optical port switching according to the optical port switching instruction, thereby implementing optical port switching of the optical network unit 110, ensuring normal operation of the optical network unit 110, and simplifying The optical port switching operation flow of the optical network unit 110.
- the following describes the implementation process by taking an ONU of the type of multiple Dwelling Unit (MDU) as an example.
- MDU multiple Dwelling Unit
- Different combinations of different Boolean quantities can represent different states of different optical modules on the ONU, PON
- the MAC chip can implement the optical port protection of the ONU by using different states corresponding to the different optical modules.
- Each optical port has two states: the working state ACT and the optical signal state SD, so the four state booleans can be divided into two groups, one group being PON_LT0_ACT and PON_LT0_SD, corresponding to the working (protective) optical module, and the other group
- the PON_LTl_ACT and PON_LTl_SD correspond to the protection (working) optical module.
- the two sets of state booleans are provided by the Complex Programmable Logic Device (CPLD), and are acquired from the CPLD in real time from the BSP (Board Support Packet) interface, so that for non-working ports,
- the SD state can be determined by a combination of these two sets of state booleans.
- PON_LT0 When PON_LT0 is working, its (PON_LT0_ACT, PON_LT0_SD) value is (1,1), and the non-working port P0N_LT1_ACT is 0.
- the non-working port SD value is the P0N_LT1_SD value. If the SD value is 0, it means that the current cannot The protection switching function is executed. If the SD value is 1, it indicates that the switching can be protected.
- the Boolean values for the SD status of the non-working port are shown in Table 1.
- BSP interface provides real-time status
- the OMCI management entity specified in ITU-G.984.4 is still used, and a TypeC force data management entity is set.
- the attribute line number of the entity indicates the optical path number and the active and standby of the ONU and the OLT.
- the set parameter line number corresponding to the protection switching of the port corresponds, and the management entity automatically notifies the OLT of the current non-working port SD state by the attribute value change AVC ( Attribute Value Change ) message.
- AVC Attribute Value Change
- Management entity ID 0. (2 bytes)
- Inactive fiber status The status of the non-working optical port.
- the OLT uses it to determine whether the PST message can be sent when the forced protection condition occurs.
- the ONU switches to the non-working optical port. Set to 0 if there is no optical signal at the current protection port, otherwise set to 1. (1 byte)
- the ONU When the ONU receives the PST message of the PLOAM message family of the optical port switching command, it indicates that the non-working port is optical. You can use the BSP interface to switch to the non-working port (nanosecond level) immediately, that is, the optical port corresponding to the line number.
- the line number value of 0 or 1 indicates that the OLT requires the ONU to switch to the optical link of the optical module 1 or the optical link of the optical module 2 through the PST message.
- the various real-time status parameters corresponding to the present invention can be obtained by the BSP from a General Purpose Input/Output (GPIO) or CPLD register.
- GPIO General Purpose Input/Output
- CPLD register CPLD register
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Abstract
Disclosed are an optical port switchover method and system of an optical network unit. The optical network unit comprises a first optical port being currently a working optical port and a second optical port being currently a standby optical port. The method comprises: a first optical port regularly sending status information of a second optical port to an optical line terminal; when the first optical port is faulty, the optical line terminal determining, according to the status information of the second optical port, whether the second optical port is currently available; when the second optical port is currently available, the optical line terminal sending an optical port switchover instruction to an optical network unit through the first optical port; and the optical network unit performing switchover according to the optical port switchover instruction so that the second optical port is a current working optical port and the first optical port is a standby optical port. Through the method and the system of the present invention, optical port switchover of the optical network unit is implemented, normal work of the optical network unit is ensured, and the operation process of the optical port switchover of the optical network unit is simplified.
Description
光网络单元的光口切换方法和*** 技术领域 Optical port switching method and system for optical network unit
本发明涉及光网络技术领域， 尤其是涉及一种光网络单元的光口切换 方法和***。 背景技术 The present invention relates to the field of optical network technologies, and in particular, to an optical port switching method and system for an optical network unit. Background technique
随着光纤接入技术的迅速发展， 其已经成为全世界的热点技术之一。 无源光网络 ( PON, Passive Optical Network )技术经过近 20年的发展， 已 成为 "光进铜退"接入层网络转型技术发展的重要方向。 "光进铜退"接入层网 络技术大多是通过光纤到楼（FTTB , Fiber to The Building )模式建设， 其 中， 光网络单元（ ONU, Optical Network Unit )是 FTTB建设模式中重要 的网络节点设备， 在吉比特无源光网络（GPON ) ***中， 采用光网络单元 的物理层操作管理和维护（ PLOAM, Physical Layer Operations Administration and Maintenance ) 交互方式实现光网络管理。 With the rapid development of fiber access technology, it has become one of the hot technologies in the world. After nearly 20 years of development, Passive Optical Network (PON) technology has become an important direction for the development of the network transformation technology of the "light into copper". Most of the "light into copper retreat" access layer network technology is built through the Fiber to the Building (FTTB) mode. Among them, the Optical Network Unit (ONU) is an important network node device in the FTTB construction mode. In the Gigabit Passive Optical Network (GPON) system, the optical network management is implemented by the physical layer operation and maintenance (PLOAM) interaction mode of the optical network unit.
现有技术中， 为了实现对吉比特无源光网络***中的光网络单元的光 口保护切换，采用的是同步数字体系（SDH, Synchronous Digital Hierarchy ) 网络保护架构机制，该机制中，光网络单元和光线路终端（ OLT, Optical Line Terminal )被认为是对等设备， 需要通过 K1或 K2字节编码来实现光网络 单元的光口切换， 其整个操作流程复杂， 同时也不能很好地适应一光线路 终端对应多个光网络单元的网络布局。 发明内容 In the prior art, in order to implement optical port protection switching of an optical network unit in a Gigabit passive optical network system, a Synchronous Digital Hierarchy (SDH) network protection architecture mechanism is adopted. In this mechanism, an optical network is used. The unit and the optical line terminal (OLT) are considered to be peer devices. The optical port switching of the optical network unit needs to be performed by K1 or K2 byte coding. The entire operation process is complicated and cannot be well adapted to one. The optical line terminal corresponds to a network layout of a plurality of optical network units. Summary of the invention
本发明的主要目的在于提供一种光网络单元的光口切换方法和***， 实现光网络单元的光口切换， 保证光网络单元正常工作， 并简化光口切换
流程。 The main purpose of the present invention is to provide an optical port switching method and system for an optical network unit, which implements optical port switching of an optical network unit, ensures normal operation of the optical network unit, and simplifies optical port switching. Process.
本发明提出一种光网络单元的光口切换方法， 所述光网络单元包括当 前为工作光口的第一光口和当前为备用光口的第二光口， 包括步驟： The present invention provides an optical port switching method for an optical network unit, where the optical network unit includes a first optical port that is currently a working optical port and a second optical port that is currently a standby optical port, and includes the following steps:
第一光口定时向光线路终端发送第二光口的状态信息； The first optical port periodically sends status information of the second optical port to the optical line terminal;
当第一光口出现故障， 光线路终端根据第二光口的状态信息判断第二 光口当前是否可用； When the first optical port is faulty, the optical line terminal determines, according to the status information of the second optical port, whether the second optical port is currently available;
当第二光口当前可用， 则光线路终端通过第一光口向光网络单元发送 光口切换指令； When the second optical port is currently available, the optical line terminal sends an optical port switching instruction to the optical network unit through the first optical port;
光网络单元根据光口切换指令， 将当前的工作光口切换为第二光口， 并置第一光口为备用光口。 The optical network unit switches the current working optical port to the second optical port according to the optical port switching instruction, and sets the first optical port as the standby optical port.
优选地， 所述光线路终端通过以下方式判断第一光口是否出现故障： 光线路终端在接收到第二光口的状态信息后， 启动定时计时功能， 判 断设定时间内是否接收到下一第二光口的状态信息； 若否， 则表明第一光 口出现故障； 若是， 则表明第一光口正常。 Preferably, the optical line terminal determines whether the first optical port is faulty by the following manner: After receiving the status information of the second optical port, the optical line terminal starts a timing function to determine whether the next time is received within the set time. Status information of the second optical port; if not, it indicates that the first optical port is faulty; if yes, it indicates that the first optical port is normal.
优选地， 第二光口的状态包括： 有光信号的状态和无光信号的状态。 优选地， 所述光线路终端根据第二光口的状态信息判断第二光口是否 可用具体为： Preferably, the state of the second optical port comprises: a state of having a light signal and a state of a lightless signal. Preferably, the optical line terminal determines, according to the status information of the second optical port, whether the second optical port is available:
光线路终端根据第二光口的状态信息， 判断第二光口当前状态是否为 有光信号的状态； The optical line terminal determines, according to the state information of the second optical port, whether the current state of the second optical port is a state with an optical signal;
当第二光口当前状态为有光信号的状态， 则表示第二光口可用； 当第二光口当前状态为无光信号的状态， 则表示第二光口不可用。 优选地， 所述第二光口的状态信息为光线路终端当前最近一次接收的 第二光口的状态信息。 When the current state of the second optical port is a state with an optical signal, it indicates that the second optical port is available; when the current state of the second optical port is a state of no optical signal, it indicates that the second optical port is unavailable. Preferably, the status information of the second optical port is status information of the second optical port that is currently received by the optical line terminal.
本发明另提出一种光网络单元的光口切换***， 包括光网络单元和光 线路终端； 所述光网络单元包括当前为工作光口的第一光口和当前为备用
光口的第二光口； The present invention further provides an optical port switching system of an optical network unit, including an optical network unit and an optical line terminal. The optical network unit includes a first optical port that is currently a working optical port and is currently in standby. a second optical port of the optical port;
第一光口， 用于定时向光线路终端发送第二光口的状态信息； 光线路终端， 用于当第一光口故障， 根据第二光口的状态信息判断第 二光口当前是否可用； 以及当第二光口当前可用， 则光线路终端通过第一 光口向光网络单元发送光口切换指令； The first optical port is configured to periodically send the status information of the second optical port to the optical line terminal. The optical line terminal is configured to determine, according to the status information of the second optical port, whether the second optical port is currently available. And when the second optical port is currently available, the optical line terminal sends an optical port switching instruction to the optical network unit through the first optical port;
光网络单元， 用于根据光口切换指令， 将当前的工作光口切换为第二 光口， 并置第一光口为备用光口。 The optical network unit is configured to switch the current working optical port to the second optical port according to the optical port switching instruction, and the first optical port is a standby optical port.
优选地， 所述光线路终端， 具有还用于在接收到第二光口的状态信息 后， 启动定时计时功能， 判断设定时间内是否收到下一第二光口的状态信 息， 若否， 则表明第一光口出现故障； 若是， 则表明第一光口正常。 Preferably, the optical line terminal is further configured to: after receiving the status information of the second optical port, start a timing function, and determine whether the status information of the next second optical port is received within the set time, and if not , indicating that the first optical port is faulty; if so, it indicates that the first optical port is normal.
优选地， 光网络单元的光口切换***， 所述第二光口的状态包括： 有 光信号的状态和无光信号的状态。 Preferably, the optical port switching system of the optical network unit, the state of the second optical port includes: a state of having an optical signal and a state of a non-optical signal.
优选地， 所述光线路终端， 具体还用于根据第二光口的状态信息， 判 断第二光口当前状态是否为有光信号的状态； 当第二光口当前状态为有光 信号的状态， 则表示第二光口可用； 当第二光口当前状态为无光信号的状 态， 则表示第二光口不可用。 Preferably, the optical line terminal is further configured to determine, according to the state information of the second optical port, whether the current state of the second optical port is a state with an optical signal; and when the current state of the second optical port is a state with an optical signal , indicating that the second optical port is available; when the current state of the second optical port is a state of no light signal, it indicates that the second optical port is unavailable.
优选地， 所述第二光口的状态信息为光线路终端当前最近一次接收的 第二光口的状态信息。 Preferably, the status information of the second optical port is status information of the second optical port that is currently received by the optical line terminal.
本发明所提供的光网络单元的光口切换方法和***， 光网络单元通过 工作光口定时向光线路终端发送备用光口的状态信息， 在工作光口故障时， 光线路终端确定备用光口可用后向光网络单元光口切换指令， 光网络单元 根据光口切换指令进行工作光口切换的方式， 实现了光网络单元的光口切 换， 保证了光网络单元的正常工作， 简化了光网络单元的光口切换操作流 程。
附图说明 The optical port switching method and system for the optical network unit provided by the present invention, the optical network unit sends the status information of the standby optical port to the optical line terminal through the working optical port timing, and when the working optical port is faulty, the optical line terminal determines the standby optical port. The optical port switching instruction of the optical network unit can be used, and the optical network unit performs the working optical port switching according to the optical port switching instruction, thereby realizing the optical port switching of the optical network unit, ensuring the normal operation of the optical network unit, and simplifying the optical network. The optical port switching operation flow of the unit. DRAWINGS
图 1是本发明的光网络单元的光口切换方法一实施例的流程图； 图 2是本发明的光网络单元的光口切换***一实施例的结构示意图。 本发明目的的实现、 功能特点及优点将结合实施例， 参照附图做进一 步说明。 具体实施方式 1 is a flow chart of an embodiment of an optical port switching method of an optical network unit according to the present invention; and FIG. 2 is a schematic structural diagram of an optical port switching system of an optical network unit according to an embodiment of the present invention. The implementation, functional features and advantages of the objects of the present invention will be further described in conjunction with the embodiments herein. detailed description
应当理解， 此处所描述的具体实施例仅用以解释本发明， 并不用于限 定本发明。 It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
参见图 1 ,提出本发明的光网络单元的光口切换方法一实施例， 光网络 单元包括当前为工作光口的第一光口和当前为备用光口的第二光口。 该方 法包括： Referring to FIG. 1, an embodiment of an optical port switching method for an optical network unit according to the present invention is provided. The optical network unit includes a first optical port that is currently a working optical port and a second optical port that is currently a standby optical port. The method includes:
步驟 S101、 第一光口定时向光线路终端发送第二光口的状态信息； 步驟 S102、 当第一光口出现故障， 光线路终端根据第二光口的状态信 息判断第二光口当前是否可用； 当第二光口当前可用， 则转入步驟 S103; 若否， 则结束流程。 Step S101: The first optical port periodically sends the status information of the second optical port to the optical line terminal. Step S102: When the first optical port is faulty, the optical line terminal determines, according to the status information of the second optical port, whether the second optical port is currently Available; when the second optical port is currently available, go to step S103; if no, the process ends.
步驟 S103、光线路终端通过第一光口向光网络单元发送光口切换指令； 步驟 S104、 光网络单元根据光口切换指令， 将当前的工作光口切换为 第二光口， 并置第一光口为备用光口。 Step S103: The optical line terminal sends an optical port switching instruction to the optical network unit through the first optical port. Step S104: The optical network unit switches the current working optical port to the second optical port according to the optical port switching instruction, and juxtaposes the first The optical port is an alternate optical port.
光口切换指令包含有目标光口的序号， 光网络单元根据序号就可找到 对应的目标光口， 并将工作光口切换为目标光口。 如本实施例中的目标光 口序号为第二光口的序号。 The optical port switching command includes the sequence number of the target optical port, and the optical network unit can find the corresponding target optical port according to the serial number, and switch the working optical port to the target optical port. The target optical port number in this embodiment is the serial number of the second optical port.
上述光网络单元的光口切换方法实施例中， 进行光口切换的先决条件 是光网络单元的第一光口和第二光口分别向光线路终端注册， 并分别都注 册成功。 光网络单元在第一、 第二光口注册成功后， 则从中选择一个光口 为工作光口， 选择另一个为备用光口。 如选择第一光口为工作光口， 选择
第二光口为备用光口。 In the embodiment of the optical port switching method of the optical network unit, a prerequisite for optical port switching is that the first optical port and the second optical port of the optical network unit are respectively registered with the optical line terminal, and are respectively registered successfully. After the optical network unit registers the first optical port and the second optical port successfully, one optical port is selected as the working optical port, and the other is the standby optical port. If the first optical port is selected as the working optical port, select The second optical port is a backup optical port.
进一步地， 上述光网络单元的光口切换方法实施例中， 光线路终端通 过以下方式判断第一光口是否出现故障： 光线路终端在接收到第二光口的 状态信息后， 启动定时计时功能， 判断设定时间内是否接收到下一第二光 口的状态信息； 若否， 则表明第一光口出现故障； 若是， 则表明第一光口 正常。 Further, in the optical port switching method of the optical network unit, the optical line terminal determines whether the first optical port is faulty by the following manner: After receiving the status information of the second optical port, the optical line terminal starts the timing function. And determining whether the status information of the next second optical port is received within the set time; if not, indicating that the first optical port is faulty; if yes, indicating that the first optical port is normal.
上述光网络单元的光口切换方法实施例中， 第一光口出现故障是指， 第一光口无法向光线路终端发送数据， 但光线路终端还可以通过第一光口 向光网络单元发送数据。 In the embodiment of the optical port switching method of the optical network unit, the failure of the first optical port means that the first optical port cannot send data to the optical line terminal, but the optical line terminal can also send the optical port to the optical network unit through the first optical port. data.
进一步地， 上述光网络单元的光口切换方法实施例中， 第二光口的状 态包括： 有光信号的状态和无光信号的状态。 本实施例中可以通过数字表 示第二光口的状态， 如用 "1" 表示第二光口为有光信号的状态， 如 "0" 表示第二光口为无光信号的状态。 Further, in the embodiment of the optical port switching method of the optical network unit, the state of the second optical port includes: a state of the optical signal and a state of the optical signal. In this embodiment, the state of the second optical port can be represented by a number, for example, a state in which the second optical port is a light signal is indicated by "1", and a state in which the second optical port is a no-light signal is indicated as "0".
进一步地， 上述光网络单元的光口切换方法实施例中， 步驟 S102具体 为： 光线路终端根据第二光口的状态信息， 判断第二光口当前状态是否为 有光信号的状态； 当第二光口当前状态为有光信号的状态， 则表示第二光 口可用； 当第二光口当前状态为无光信号的状态， 则表示第二光口不可用。 Further, in the embodiment of the optical port switching method of the optical network unit, step S102 is specifically: the optical line terminal determines, according to the state information of the second optical port, whether the current state of the second optical port is a state with an optical signal; If the current state of the optical port is a state with an optical signal, it indicates that the second optical port is available; when the current state of the second optical port is a state of no optical signal, it indicates that the second optical port is unavailable.
进一步地， 上述光网络单元的光口切换方法实施例中， 第二光口的状 态信息为光线路终端当前最近一次接收的第二光口的状态信息。 Further, in the embodiment of the optical port switching method of the optical network unit, the status information of the second optical port is status information of the second optical port that is currently received by the optical line terminal.
上述光网络单元的光口切换方法适用于一光线路终端对应一光网络单 元的网络布局， 也适用于一光线路终端对应多个光网络单元的网络布局。 The optical port switching method of the optical network unit is applicable to a network layout of an optical line terminal corresponding to an optical network unit, and is also applicable to a network layout of an optical line terminal corresponding to multiple optical network units.
上述光网络单元的光口切换方法实施例， 光网络单元通过工作光口定 时向光线路终端发送备用光口的状态信息， 在工作光口故障时， 光线路终 端确定备用光口可用后向光网络单元光口切换指令， 光网络单元根据光口 切换指令进行工作光口切换的方式， 实现了光网络单元的光口切换， 保证
了光网络单元的正常工作， 简化了光网络单元的光口切换操作流程。 In the optical port switching method of the optical network unit, the optical network unit sends the status information of the standby optical port to the optical line terminal through the working optical port timing. When the working optical port is faulty, the optical line terminal determines that the standby optical port can be used to return the light. The optical port switching instruction of the network unit, the optical network unit performs the working optical port switching according to the optical port switching instruction, thereby realizing the optical port switching of the optical network unit, ensuring The normal operation of the optical network unit simplifies the optical port switching operation process of the optical network unit.
参见图 2,提出本发明的光网络单元的光口切换*** 100实施例， 包括 光网络单元 110和光线路终端 120。光网络单元 110包括当前为工作光口的 第一光口 111和当前为备用光口的第二光口 112。 第一光口 111 , 用于定时 向光线路终端发送第二光口 112的状态信息。 光线路终端 120, 用于当第一 光口 111出现故障，则根据第二光口 112的状态信息判断第二光口 112当前 是否可用； 以及当第二光口 112当前可用， 则光线路终端 120通过第一光 口 111向光网络单元发送光口切换指令。 光网络单元 110, 用于根据光口切 换指令， 将当前的工作光口切换为第二光口 112, 并置第一光口 111为备用 光口。 Referring to Figure 2, an embodiment of an optical port switching system 100 for an optical network unit of the present invention is provided, including an optical network unit 110 and an optical line termination 120. The optical network unit 110 includes a first optical port 111 that is currently a working optical port and a second optical port 112 that is currently a standby optical port. The first optical port 111 is configured to periodically send status information of the second optical port 112 to the optical line terminal. The optical line terminal 120 is configured to determine, according to the status information of the second optical port 112, whether the second optical port 112 is currently available according to the status information of the second optical port 112; and when the second optical port 112 is currently available, the optical line terminal 120 sends an optical port switching instruction to the optical network unit through the first optical port 111. The optical network unit 110 is configured to switch the current working optical port to the second optical port 112 according to the optical port switching command, and juxtapose the first optical port 111 as a backup optical port.
光口切换指令包还有目标光口的序号， 光网络单元根据序号就可找到 对应的目标光口， 并将工作光口切换为目标光口。 如本实施例中的目标光 口序号就上第二光口 112的序号。 The optical port switching instruction packet also has a serial number of the target optical port, and the optical network unit can find the corresponding target optical port according to the serial number, and switch the working optical port to the target optical port. The target optical port number in this embodiment is the serial number of the second optical port 112.
上述光网络单元 110 的光口切换方法实施例中， 进行光口切换的先决 条件是光网络单元 110的第一光口 111和第二光口 112分别向光线路终端 120注册， 并分别都注册成功。 光网络单元 110在第一、 第二光口注册成功 后， 则从中选择一个光口为工作光口， 选择另一个为备用光口。 如选择第 一光口 111为工作光口， 选择第二光口 112为备用光口。 In the embodiment of the optical port switching method of the optical network unit 110, a prerequisite for optical port switching is that the first optical port 111 and the second optical port 112 of the optical network unit 110 are respectively registered with the optical line terminal 120, and are respectively registered. success. After the first and second optical ports are successfully registered, the optical network unit 110 selects one optical port as the working optical port and the other as the standby optical port. If the first optical port 111 is selected as the working optical port, the second optical port 112 is selected as the standby optical port.
进一步地， 上述光网络单元的光口切换*** 100 实施例， 光线路终端 120, 具有用于在接收到第二光口 112的状态信息后， 启动定时计时功能， 判断设定时间内是否收到下一第二光口 112 的状态信息， 若否， 则表明第 一光口 111出现故障； 若是， 则表明第一光口 111正常。 上述光网络单元的 光口切换方法实施例中，第一光口 111出现故障是指第一光口 111无法向光 线路终端 120发送数据， 但光线路终端 120还可以通过第一光口 111向光 网络单元 110发送数据。
进一步地， 上述光网络单元的光口切换***， 第二光口 112 的状态包 括： 有光信号的状态和无光信号的状态。 本实施例中可以通过数字表示第 二光口 112的状态，如用 "1"表示第二光口 112为有光信号的状态，如 "0" 表示第二光口 112为无光信号的状态。 Further, in the embodiment of the optical port switching system 100 of the optical network unit, the optical line terminal 120 has a function for starting the timing function after receiving the status information of the second optical port 112, and determining whether the received time is received within the set time. The status information of the next second optical port 112, if not, indicates that the first optical port 111 is faulty; if so, it indicates that the first optical port 111 is normal. In the embodiment of the optical port switching method of the optical network unit, the failure of the first optical port 111 means that the first optical port 111 cannot send data to the optical line terminal 120, but the optical line terminal 120 can also pass through the first optical port 111. Optical network unit 110 transmits data. Further, in the optical port switching system of the optical network unit, the state of the second optical port 112 includes: a state of the optical signal and a state of the optical signal. In this embodiment, the state of the second optical port 112 can be represented by a numeral, such as "1" indicating that the second optical port 112 is in a state of having an optical signal, and "0" indicating that the second optical port 112 is in a state of no optical signal. .
进一步地， 上述光网络单元的光口切换*** 100 实施例中， 光线路终 端 120, 具体还用于根据第二光口 112的状态信息， 判断第二光口 112当前 状态是否为有光信号的状态； 当第二光口 112当前状态为有光信号的状态， 则表示第二光口 112可用； 当第二光口 112当前状态为无光信号的状态， 则表示第二光口 112不可用。 Further, in the embodiment of the optical port switching system 100 of the optical network unit, the optical line terminal 120 is specifically configured to determine, according to the state information of the second optical port 112, whether the current state of the second optical port 112 is an optical signal. When the current state of the second optical port 112 is a state with an optical signal, it indicates that the second optical port 112 is available; when the current state of the second optical port 112 is a state of no optical signal, it indicates that the second optical port 112 is unavailable. .
进一步地， 上述光网络单元的光口切换*** 100 实施例中， 第二光口 112的状态信息为光线路终端 120当前最近一次接收的第二光口 112的状态 信息。 Further, in the embodiment of the optical port switching system 100 of the optical network unit, the status information of the second optical port 112 is status information of the second optical port 112 that the optical line terminal 120 has recently received.
上述光网络单元的光口切换*** 100适用于一光线路终端 120对应一 光网络单元 110的网络布局， 也适用于一光线路终端 120对应多个光网络 单元 110的网络布局。 The optical port switching system 100 of the optical network unit is applicable to a network layout of an optical line terminal 120 corresponding to an optical network unit 110, and is also applicable to a network layout of an optical line terminal 120 corresponding to multiple optical network units 110.
上述光网络单元的光口切换*** 100 实施例， 光网络单元通过工作光 口定时向光线路终端 120发送备用光口的状态信息， 在工作光口故障时， 光线路终端 120确定备用光口可用后向光网络单元 110光口切换指令， 光 网络单元 110根据光口切换指令进行工作光口切换的方式， 实现了光网络 单元 110的光口切换， 保证了光网络单元 110的正常工作， 简化了光网络 单元 110的光口切换操作流程。 In an embodiment of the optical port switching system 100 of the optical network unit, the optical network unit sends the status information of the standby optical port to the optical line terminal 120 through the working optical port timing. When the working optical port is faulty, the optical line terminal 120 determines that the standby optical port is available. The optical interface switching instruction of the optical network unit 110 is performed, and the optical network unit 110 performs the optical port switching according to the optical port switching instruction, thereby implementing optical port switching of the optical network unit 110, ensuring normal operation of the optical network unit 110, and simplifying The optical port switching operation flow of the optical network unit 110.
下面以多用户居住单元（MDU, Multiple Dwelling Unit, )类型的 ONU 为例来说明具体实现过程。 The following describes the implementation process by taking an ONU of the type of multiple Dwelling Unit (MDU) as an example.
1.光口状态布尔量的设置。 1. The setting of the optical port state Boolean.
不同布尔量的不同组合可以表示 ONU上不同光模块的不同状态， PON
MAC芯片可以使用这些不同光模块对应的不同状态实现 ONU的光口保护。 每个光口有两个状态： 工作状态 ACT和光信号状态 SD, 因此这 4个状态 布尔量可分为 2组， 一组为 PON_LT0_ACT和 PON_LT0_SD, 对应于工作 (保护）光模块， 而另一组为 PON_LTl_ACT和 PON_LTl_SD则对应于保 护（工作 )光模块。 这 2组状态布尔量由硬件复杂可编程逻辑器件（ CPLD, Complex Programmable Logic Device )提供, 从板载支持包 ( BSP, Board Support Packet )接口从 CPLD实时获取， 这样对于非工作口来说， 其 SD 状态可以由这 2组状态布尔量的组合来确定。 当 PON_LT0在工作时， 其 (PON_LT0_ACT, PON_LT0_SD)值为（1,1), 非工作口的 P0N_LT1_ACT为 0, 这时非工作口 SD值即为 P0N_LT1_SD值， 若 SD值为 0, 则说明当前 不能执行保护倒换功能，若 SD值为 1 ,则说明可以保护倒换。非工作口 SD 状态的布尔量数值见表 1。Different combinations of different Boolean quantities can represent different states of different optical modules on the ONU, PON The MAC chip can implement the optical port protection of the ONU by using different states corresponding to the different optical modules. Each optical port has two states: the working state ACT and the optical signal state SD, so the four state booleans can be divided into two groups, one group being PON_LT0_ACT and PON_LT0_SD, corresponding to the working (protective) optical module, and the other group The PON_LTl_ACT and PON_LTl_SD correspond to the protection (working) optical module. The two sets of state booleans are provided by the Complex Programmable Logic Device (CPLD), and are acquired from the CPLD in real time from the BSP (Board Support Packet) interface, so that for non-working ports, The SD state can be determined by a combination of these two sets of state booleans. When PON_LT0 is working, its (PON_LT0_ACT, PON_LT0_SD) value is (1,1), and the non-working port P0N_LT1_ACT is 0. At this time, the non-working port SD value is the P0N_LT1_SD value. If the SD value is 0, it means that the current cannot The protection switching function is executed. If the SD value is 1, it indicates that the switching can be protected. The Boolean values for the SD status of the non-working port are shown in Table 1.
BSP接口提供实时状态 BSP interface provides real-time status
2.设置一个 ΟΝΤ管理和控制接口（ OMCI, ONT Management and Control Interface ) 管理实体 TypeC force data。 2. Set up an OM Management and Control Interface (OMCI, ONT Management and Control Interface) to manage the entity TypeC force data.
为了便于 OLT与 ONU进行消息交互，仍采用 ITU-G.984.4规定的 OMCI 管理实体的形式， 设置一个 TypeC force data管理实体， 其实体的属性 line number表示光路序号， 与对 ONU与 OLT的主备口进行保护倒换的设定参 量 line number相对应， 这个管理实体通过属性值变化 AVC ( Attribute Value Change ) 消息来自动向 OLT通报当前非工作口 SD状态。 In order to facilitate the OLT to interact with the ONU, the OMCI management entity specified in ITU-G.984.4 is still used, and a TypeC force data management entity is set. The attribute line number of the entity indicates the optical path number and the active and standby of the ONU and the OLT. The set parameter line number corresponding to the protection switching of the port corresponds, and the management entity automatically notifies the OLT of the current non-working port SD state by the attribute value change AVC ( Attribute Value Change ) message.
管理实体 TypeC force data的属性说明：
管理实体 ID: 0。 （2字节） Description of the attributes of the managed entity TypeC force data: Management entity ID: 0. (2 bytes)
Inactive fiber status: 非工作光口的状态， OLT用它来判定在强制保护 条件发生时是否可以下发 PST消息要求 ONU切换到非工作光口。如果当前 保护光口没有光信号时， 置 0, 否则置 1。 （1字节） Inactive fiber status: The status of the non-working optical port. The OLT uses it to determine whether the PST message can be sent when the forced protection condition occurs. The ONU switches to the non-working optical port. Set to 0 if there is no optical signal at the current protection port, otherwise set to 1. (1 byte)
3.0NU光口切换。 3.0NU optical port switching.
当 ONU收到光口切换命令 PLOAM消息族的 PST消息时，表明非工作 口是有光信号的， 可以用 BSP接口立即 （纳秒级）切换到非工作口， 也即 line number对应的光口， line number值 0或 1分别代表 OLT通过 PST消息 要求 ONU切换到光模块 1的光链路或光模块 2的光链路。 When the ONU receives the PST message of the PLOAM message family of the optical port switching command, it indicates that the non-working port is optical. You can use the BSP interface to switch to the non-working port (nanosecond level) immediately, that is, the optical port corresponding to the line number. The line number value of 0 or 1 indicates that the OLT requires the ONU to switch to the optical link of the optical module 1 or the optical link of the optical module 2 through the PST message.
本发明对应的各种实时状态参量可以由 BSP 从硬件通用输入 /输出 ( GPIO, General Purpose Input Output )或 CPLD寄存器获取。 The various real-time status parameters corresponding to the present invention can be obtained by the BSP from a General Purpose Input/Output (GPIO) or CPLD register.
应当理解的是， 以上仅为本发明的优选实施例， 不能因此限制本发明 的专利范围， 凡是利用本发明说明书及附图内容所作的等效结构或等效流 程变换， 或直接或间接运用在其他相关的技术领域， 均同理包括在本发明 的专利保护范围内。
It should be understood that the above is only a preferred embodiment of the present invention, and thus the scope of the invention is not limited thereby, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are used directly or indirectly. Other related technical fields are equally included in the scope of patent protection of the present invention.
Claims
1、 一种光网络单元的光口切换方法， 所述光网络单元包括当前为工作 光口的第一光口和当前为备用光口的第二光口， 其特征在于， 包括步驟： 第一光口定时向光线路终端发送第二光口的状态信息； The optical port switching method of the optical network unit, wherein the optical network unit includes a first optical port that is currently a working optical port and a second optical port that is currently a standby optical port, and the method includes the following steps: The optical port periodically sends status information of the second optical port to the optical line terminal;
当第一光口出现故障， 光线路终端根据第二光口的状态信息判断第二 光口当前是否可用； When the first optical port is faulty, the optical line terminal determines, according to the status information of the second optical port, whether the second optical port is currently available;
当第二光口当前可用， 则光线路终端通过第一光口向光网络单元发送 光口切换指令； When the second optical port is currently available, the optical line terminal sends an optical port switching instruction to the optical network unit through the first optical port;
光网络单元根据光口切换指令， 将当前的工作光口切换为第二光口， 并置第一光口为备用光口。 The optical network unit switches the current working optical port to the second optical port according to the optical port switching instruction, and sets the first optical port as the standby optical port.
2、 根据权利要求 1所述的光网络单元的光口切换方法， 其特征在于， 所述光线路终端通过以下方式判断第一光口是否出现故障： The optical port switching method of the optical network unit according to claim 1, wherein the optical line terminal determines whether the first optical port is faulty by:
光线路终端在接收到第二光口的状态信息后， 启动定时计时功能， 判 断设定时间内是否接收到下一第二光口的状态信息； 若否， 则表明第一光 口出现故障； 若是， 则表明第一光口正常。 After receiving the status information of the second optical port, the optical line terminal starts the timing function to determine whether the status information of the next second optical port is received within the set time; if not, the first optical port is faulty; If yes, it indicates that the first optical port is normal.
3、 根据权利要求 1或 2所述的光网络单元的光口切换方法， 其特征在 于， 第二光口的状态包括： 有光信号的状态和无光信号的状态。 The optical port switching method of the optical network unit according to claim 1 or 2, wherein the state of the second optical port comprises: a state of the optical signal and a state of the optical signal.
4、 根据权利要求 3所述的光网络单元的光口切换方法， 其特征在于， 所述光线路终端根据第二光口的状态信息判断第二光口是否可用具体为： 光线路终端根据第二光口的状态信息， 判断第二光口当前状态是否为 有光信号的状态； The optical port switching method of the optical network unit according to claim 3, wherein the optical line terminal determines whether the second optical port is available according to the state information of the second optical port: The status information of the second optical port determines whether the current state of the second optical port is a state with an optical signal;
当第二光口当前状态为有光信号的状态， 则表示第二光口可用； 当第二光口当前状态为无光信号的状态， 则表示第二光口不可用。 When the current state of the second optical port is a state with an optical signal, it indicates that the second optical port is available; when the current state of the second optical port is a state of no optical signal, it indicates that the second optical port is unavailable.
5、 根据权利要求 4所述的光网络单元的光口切换方法， 其特征在于， 所述第二光口的状态信息为光线路终端当前最近一次接收的第二光口 的状态信息。 The optical port switching method of the optical network unit according to claim 4, wherein the status information of the second optical port is the second optical port currently received by the optical line terminal. Status information.
6、 一种光网络单元的光口切换***， 其特征在于， 包括光网络单元和 光线路终端； 所述光网络单元包括当前为工作光口的第一光口和当前为备 用光口的第二光口； An optical port switching system of an optical network unit, comprising: an optical network unit and an optical line terminal; wherein the optical network unit comprises a first optical port that is currently a working optical port and a second optical port that is currently a standby optical port. Optical port
第一光口， 用于定时向光线路终端发送第二光口的状态信息； 光线路终端， 用于当第一光口故障， 根据第二光口的状态信息判断第 二光口当前是否可用； 以及当第二光口当前可用， 则光线路终端通过第一 光口向光网络单元发送光口切换指令； The first optical port is configured to periodically send the status information of the second optical port to the optical line terminal. The optical line terminal is configured to determine, according to the status information of the second optical port, whether the second optical port is currently available. And when the second optical port is currently available, the optical line terminal sends an optical port switching instruction to the optical network unit through the first optical port;
光网络单元， 用于根据光口切换指令， 将当前的工作光口切换为第二 光口， 并置第一光口为备用光口。 The optical network unit is configured to switch the current working optical port to the second optical port according to the optical port switching instruction, and the first optical port is a standby optical port.
7、 根据权利要求 6所述的光网络单元的光口切换***， 其特征在于， 所述光线路终端， 具有还用于在接收到第二光口的状态信息后， 启动 定时计时功能， 判断设定时间内是否收到下一第二光口的状态信息， 若否， 则表明第一光口出现故障； 若是， 则表明第一光口正常。 The optical port switching system of the optical network unit according to claim 6, wherein the optical line terminal further has a function of starting a timing function after receiving the state information of the second optical port, and determining Whether the status information of the next second optical port is received within the set time. If not, it indicates that the first optical port is faulty; if yes, the first optical port is normal.
8、 根据权利要求 6或 7所述的光网络单元的光口切换***， 其特征在 于， 所述第二光口的状态包括： 有光信号的状态和无光信号的状态。 The optical port switching system of the optical network unit according to claim 6 or 7, wherein the state of the second optical port comprises: a state of having an optical signal and a state of a non-optical signal.
9、 根据权利要求 8所述的光网络单元的光口切换***， 其特征在于， 所述光线路终端， 具体还用于根据第二光口的状态信息， 判断第二光 口当前状态是否为有光信号的状态； 当第二光口当前状态为有光信号的状 态， 则表示第二光口可用； 当第二光口当前状态为无光信号的状态， 则表 示第二光口不可用。 The optical port switching system of the optical network unit according to claim 8, wherein the optical line terminal is further configured to determine, according to the state information of the second optical port, whether the current state of the second optical port is When the current state of the second optical port is a state with an optical signal, the second optical port is available; when the current state of the second optical port is a state without a light signal, the second optical port is unavailable. .
10、 根据权利要求 9所述的光网络单元的光口切换***， 其特征在于， 所述第二光口的状态信息为光线路终端当前最近一次接收的第二光口 的状态信息。 The optical port switching system of the optical network unit according to claim 9, wherein the state information of the second optical port is state information of the second optical port that is currently received by the optical line terminal.
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| CN102263587B (en) * | 2011-07-26 | 2017-07-14 | 中兴通讯股份有限公司 | The optical port changing method and system of optical network unit |
| CN104040914A (en) * | 2012-11-12 | 2014-09-10 | 华为技术有限公司 | Communication method for optical network system, system and device |
| WO2015131360A1 (en) * | 2014-03-05 | 2015-09-11 | 华为技术有限公司 | Method, device and system for link switching |
| CN109450527B (en) * | 2018-10-24 | 2020-09-08 | 中国电信股份有限公司广东传送网络运营中心 | Fault determination method and device, computer equipment and storage medium |
| CN113382324B (en) * | 2021-08-12 | 2021-11-23 | 武汉西迪特通信技术有限公司 | Method capable of switching GPON and EPON modes and dual-mode OLT head-end equipment |
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