WO2024221978A1 - 光线路信道终端保护方法及相关设备 - Google Patents

光线路信道终端保护方法及相关设备 Download PDF

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Publication number
WO2024221978A1
WO2024221978A1 PCT/CN2023/139402 CN2023139402W WO2024221978A1 WO 2024221978 A1 WO2024221978 A1 WO 2024221978A1 CN 2023139402 W CN2023139402 W CN 2023139402W WO 2024221978 A1 WO2024221978 A1 WO 2024221978A1
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WIPO (PCT)
Prior art keywords
olt
state
protection
optical line
channel terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/CN2023/139402
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English (en)
French (fr)
Inventor
李棨政
张德智
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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Publication date
Application filed by China Telecom Corp Ltd filed Critical China Telecom Corp Ltd
Priority to KR1020257032194A priority Critical patent/KR20250166147A/ko
Publication of WO2024221978A1 publication Critical patent/WO2024221978A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • H04B10/25—Arrangements specific to fibre transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0293—Optical channel protection

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to an optical line channel terminal protection method, device, electronic device, computer-readable storage medium, and computer program product.
  • the WDM-PON Widelength Division Multiplexing-Passive Optical Network
  • the PON Passive Optical Network
  • the central office OLT (Optical Line Terminal) device and the user-side terminal ONU (Optical Network Unit) device each exclusively occupies a pair of wavelength channels point-to-point.
  • the wavelength channels are transmitted based on different wavelength channels and are isolated from each other.
  • the adjustable protection OLT CT Optical Line Terminal Channel Terminal
  • the present disclosure provides an optical line channel terminal protection method, device, electronic device and computer-readable storage medium, which at least to a certain extent overcome the problem that the related art does not support adjustable one-to-many protection.
  • an optical line channel terminal protection method which is applied to an optical line channel terminal OLT CT, comprising: when the OLT CT in an initial state supports frequency scanning, the OLT CT scans one or more operating wavelength channels, and determines the state of the OLT CT based on identified events.
  • it also includes: when the event is receiving an uplink signal, the state of the OLT CT remains in the initial state and continues to scan the frequency.
  • it also includes: when the event is that the uplink burst is not received, the state of the OLT CT is determined to be a signal loss state in protection.
  • the OLT CT in the signal loss state during protection stops frequency scanning and sends a first channel terminal protocol ICTP message to the corresponding protection peer, wherein the first ICTP message is used to inquire whether switching is required.
  • the further embodiment further includes: when the event is an activation event, the OLT CT The status is determined as the pre-working status.
  • the OLT CT in the pre-working state tunes the receiving and transmitting wavelengths to the wavelength channel of the corresponding protection peer, turns on the transmitter and attempts to establish a connection between the ONUs corresponding to the wavelength channel.
  • it also includes: when the OLT CT in a working state supports frequency scanning, no uplink transmission is received within a certain period of time and a burst loss of the subordinate optical network unit ONU is detected, and the signal loss state during operation is entered.
  • the OLT CT in the signal loss state during operation continues to send downlink signals, and enters the help state after not receiving an uplink burst response within a certain period of time.
  • the OLT CT in the help state periodically sends a second ICTP message, wherein the second ICTP message is used to request the corresponding protection peer to perform protection switching and take over the wavelength channel.
  • it also includes: when the OLT CT in the help state receives an uplink signal, the OLT CT is in a backup role, or the ICTP message times out, the state of the OLT CT is determined as an initial state.
  • an optical line channel terminal adjustable protection device comprising:
  • a frequency scanning monitoring module when the OLT CT in the initial state supports frequency scanning, the OLT CT scans and runs one or more wavelength channels;
  • a state determination module determines the state of the OLT CT based on the identified events.
  • an electronic device including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute any one of the above-mentioned optical line channel terminal protection methods by executing the executable instructions.
  • a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the optical line channel terminal protection method described in any one of the above is implemented.
  • a computer program product including a computer program, and when the computer program is executed by a processor, the above-mentioned optical line channel terminal protection method is implemented.
  • FIG1 shows a flow chart of an optical line channel terminal protection method according to an embodiment of the present disclosure
  • FIG2 shows a schematic diagram of a protection state machine supporting adjustable protection OLT CT in an embodiment of the present disclosure
  • FIG3 shows a flow chart of a method for determining the state of an OLT CT in an embodiment of the present disclosure
  • FIG4 shows a flow chart of another method for determining the state of an OLT CT in an embodiment of the present disclosure
  • FIG5 shows a schematic diagram of an adjustable protection device for an optical line channel terminal according to an embodiment of the present disclosure
  • FIG6 shows a schematic diagram of an adjustable protection system for an optical line channel terminal according to an embodiment of the present disclosure
  • FIG. 7 shows a structural block diagram of an electronic device in an embodiment of the present disclosure.
  • OLT CT Optical Line Terminal Channel Terminal
  • OLT CT optical Line Terminal Channel Terminal
  • ONU Optical Network Unit
  • active optical network unit the equipment equipped with optical receiver, upstream optical transmitter and multiple bridge amplifier network monitoring is called optical node.
  • WDM Wavelength Division Multiplexing
  • WDM Widelength Division Multiplexing
  • PON Passive Optical Network mainly uses passive optical power distributor to send information to each user.
  • ICTP is a protocol for information exchange between OLT CTs at the electrical layer through a background transmission architecture. The message is not transmitted via the optical channel.
  • ODN Optical Distribution Network
  • An embodiment of the present disclosure provides an optical line channel terminal protection method, which can be executed by any electronic device with computing and processing capabilities.
  • FIG1 shows a flow chart of an optical line channel terminal protection method in an embodiment of the present disclosure.
  • the optical line channel terminal protection method provided in an embodiment of the present disclosure is applied to OLT CT and includes the following steps:
  • OLT CT Optical Line Terminal Channel Terminal
  • OLT CT optical Line Terminal Channel Terminal
  • the OLT CT in the initial state supports frequency scanning.
  • the OLT CT can scan the frequencies between each operating wavelength channel pair one by one according to the preset frequency scanning configuration, that is, adjust its transmitting and receiving wavelengths to each wavelength channel in the operating state, and monitor the uplink signal of each wavelength channel one by one for a period of time.
  • the OLT CT that supports frequency scanning generates different protection state migration processes based on different events.
  • the OLT CT when the event is receiving an uplink signal, that is, the OLT CT receives an uplink signal, indicating that another OLT CT is activated on the wavelength channel pair, the OLT CT will maintain the frequency scanning process.
  • the OLT CT when the event is that the upstream burst is not received, that is, the OLT CT does not receive the upstream transmission within a certain period of time, it will stop scanning the frequency and migrate to the protection signal loss LOS-P state, and inquire through ICTP whether the protection peer OLT CT needs to be switched.
  • the OLT CT when the event is an activation event, that is, the OLT CT is declared as the activated role, it will stop scanning the frequency, tune its transmit and receive wavelengths to the wavelength channel pair where the OLT CT that sent the message is located, and migrate to the pre-working state, turn on the transmitter and try to establish a connection with the ONU under the wavelength channel pair.
  • ICTP Inter Channel Termination Protocol
  • ICTP is a protocol for information exchange between OLT CTs at the electrical layer through a background transmission architecture. Such messages are not transmitted through optical channels.
  • the OLT CT requesting protection switching supports frequency scanning, and a specific event indicates that the transmission link has no fault, or it is temporarily impossible to determine that the fault is caused by the transmission link, the OLT CT will return to the initial state, that is, turn off the transmitter, and scan the frequency on the operating channel one by one, monitor the uplink signal, and re-perform one-to-many protection.
  • the protection switching is performed in the protection state and the working state by monitoring the uplink transmission method, and the corresponding state mechanism and state migration method when the OLT CT supports frequency sweep are introduced to support adjustable protection of the OLT CT one-to-many protection switching increases the overall versatility of the protection mechanism.
  • FIG. 2 is a schematic diagram of a protection state machine supporting adjustable protection of an OLT CT in an embodiment of the present disclosure
  • FIG. 3 is a flow chart of a method for determining the state of an OLT CT in an embodiment of the present disclosure. As shown in FIG. 3 , the method for determining the state of an OLT CT provided in an embodiment of the present disclosure is applied to an OLT CT and includes the following steps:
  • the uplink signal may be a LOS cleared event, i.e., a loss of signal cleared event, which is identified when an uplink burst is received.
  • the OLT CT in the signal loss state during protection stops frequency scanning and sends a first channel inter-terminal protocol ICTP message to the corresponding protection peer, wherein the first ICTP message is used to inquire whether switching is required.
  • the uplink burst may be a SLOS event, ie, a simple loss of signal event, which is identified in a state where no downlink transmission occurs when uplink silence is detected for a certain period of time.
  • SLOS event ie, a simple loss of signal event
  • the OLT CT in the pre-working state tunes the transmit and receive wavelengths to the wavelength channel corresponding to the protection peer, turns on the transmitter and attempts to establish a connection between the ONUs corresponding to the wavelength channel.
  • the state of the OLT CT is determined to be a pre-working state, and the time of the start timer is set manually or according to historical data, and the timing can start when the OLT CT starts frequency scanning.
  • the activation event is declared as an activated role through a specific ICTP message, namely Active().
  • the OLT CT receiving the message is declared activated. If the OLT CT supports frequency scanning, it will stop frequency scanning and tune its transmit and receive wavelengths to the wavelength channel pair where the OLT CT that sent the message is located.
  • the standby role i.e., Standby-LOS()
  • Standby-LOS() is declared as a standby role via a specific ICTP message as a result of the role assignment of the ICTP handshake.
  • the OLT CT receiving the message is declared as a standby, but is warned to avoid performing protection switching based solely on a timer timeout caused by the absence of expected upstream transmission.
  • the OLT CT in working state supports frequency scanning, if no uplink transmission is received within a certain period of time and a burst loss of the subordinate optical network unit ONU is detected, it enters the working signal loss state; the OLT CT in the working signal loss state continues to send downlink signals, and enters the help state after no uplink burst response is received within a certain period of time.
  • the state of the OLT CT is determined to be the initial state.
  • the OLT CT in the help state periodically sends a second ICTP message, wherein the second ICTP message is used to request the corresponding protection peer to perform protection switching and take over the wavelength channel;
  • the adjustable protection OLT CT in working state after protection switching does not receive upstream transmission within a certain period of time, it declares that the subordinate ONU burst is lost, and continues to try downstream transmission but still does not receive an upstream burst response within a certain period of time, it enters the help state and sends a second ICTP message to request the protection peer to perform protection switching and take over the wavelength channel.
  • the OLT CT in the help state stops the ICTP interaction timer to time the ICTP message. If the OLT CT requesting protection switching supports frequency scanning, when a specific event indicates that the transmission link has no fault, or it is temporarily impossible to determine that the fault is caused by the transmission link, the OLT CT will return to the initial state, that is, turn off the transmitter, and scan the frequency in the running channel one by one, monitor the uplink signal, and re-perform one-to-many protection; specific events include but are not limited to: LOS cleared, ICTP message timeout, Standby-LOS(), etc., that is, when the OLT CT receives an uplink signal, the OLT CT is in a backup role, or the ICTP message times out, the state of the OLT CT is determined to be the initial state.
  • Table 1 shows the corresponding protection state machine states involved in the optical line channel terminal protection method.
  • protection switching is performed in the protection state and the working state by monitoring the uplink transmission, and the corresponding state mechanism and state migration method when the OLT CT supports frequency scanning are introduced to adapt to the characteristics of WDM-PON, support adjustable protection OLT CT one-to-many protection switching, and increase the overall versatility of the protection mechanism.
  • FIG. 4 shows a flow chart of another method for determining the state of an OLT CT in an embodiment of the present disclosure. As shown in FIG. 4 , the method for determining the state of an OLT CT provided in an embodiment of the present disclosure is applied to an optical line channel terminal OLT CT. The steps include:
  • the OLT CT entering the initial state first performs an ICTP handshake with its protection peer OLT CT to confirm the effective role in the protection allocation, i.e., the active role or the standby role.
  • the OLT CT in the initial state receives an uplink signal, and the OLT CT determines to be in a pre-protection state;
  • the OLT CT in the initial state receives an upstream transmission, it indicates that the protection peer OLT CT is activated on the wavelength channel pair, and the OLT CT enters the pre-protection state, continues the handshake, turns off the start timer, and turns on the ICTP interaction timer to ensure the progress of the state machine when the ICTP infrastructure fails.
  • the OLT CT in the initial state is in the backup role, and the OLT CT is determined to be in the protection state.
  • the OLT CT in the initial state is declared as a backup role through a specific ICTP message and will directly enter the protection state.
  • the OLT CT in the protection state does not receive the upstream transmission within a certain period of time and detects a sudden loss of the subordinate ONU, and is determined to be in the signal loss state in protection. If the protection peer resumes transmission to the OLT CT, the OLT CT returns to the protection state.
  • the OLT CT in the protection state will continue to monitor the uplink signal of the channel pair. If no uplink burst is received within a certain period of time, the OLT CT will enter the protection signal loss LOS-P state and inquire about the potential protection role switching to the protection peer OLT CT. If the OLT CT resumes transmission, the OLT CT will return to the protection state.
  • the OLT CT if the OLT CT is declared as an activated role through a specific ICTP message, it will enter the pre-working state and attempt to establish a connection with the subordinate ONU of the channel pair by sending a downstream transmission. Once an upstream transmission confirmation is received, it will enter the working state.
  • the OLT CT in working state does not receive uplink transmission within a certain period of time and enters the signal loss state in working state;
  • the OLT CT in the signal loss state continues to try downstream transmission. If there is no upstream burst response within a certain period of time, the OLT CT enters the help state.
  • the OLT CT in working state after protection switching does not receive uplink transmission within a certain period of time and declares that the subordinate ONU burst is lost, it will enter the signal loss-in-work LOS-W state and continue to try downlink transmission. If there is still no uplink burst response within a certain period of time, then the OLT CT will enter In the help state, the protection peer is requested to perform protection switching through ICTP messages.
  • the OLT CT in the help state, if the OLT CT requesting protection switching supports frequency scanning, the OLT CT will enter the protection state when specific events indicate that the transmission link has no faults, or it is temporarily impossible to determine that the fault is caused by the transmission link.
  • Specific events include but are not limited to: LOS cleared, ICTP message timeout, Standby-LOS(), etc.
  • the OLT CT when it does not receive a response to its own downstream transmission or the upstream traffic confirmed by the protection peer OLT CT, it will enter a normal error state, at which time a failure of the optical fiber or optical transceiver may have occurred.
  • the OLT CT in the equipment error state enters the initial state through network management control after the error is eliminated;
  • An OLT CT that is in a device error state and does not support frequency scanning enters a pre-protection state after the error is eliminated and an uplink burst is received.
  • the OLT CT when the OLT CT detects a fault in a major local device that requires immediate protection switching, it will enter a device error state; the OLT CT in the device error state will be reinitialized to enter an initial state through network management control after the error is eliminated; the OLT CT in the normal error state can enter an initial state after the fault is eliminated, and if an uplink burst is received, it can directly enter a pre-protection state.
  • the OLT CT and its protection counterpart OLT CT switch working roles based on monitoring the uplink signal reception status of the wavelength channel in which they are located and interacting through ICTP messages, thereby performing protection switching of the working OLT CT.
  • the adjustable protection OLT CT can monitor the uplink signals of each wavelength channel pair by scanning the frequencies of each working wavelength channel pair in the WDM-PON system, thereby realizing one-to-many protection of the working OLT CT by the adjustable protection OLT CT.
  • the embodiments of the present disclosure also provide an adjustable protection device for an optical line channel terminal, such as the following embodiments. Since the principle of solving the problem in the device embodiment is similar to that in the above method embodiment, the implementation of the device embodiment can refer to the implementation of the above method embodiment, and the repeated parts will not be repeated.
  • FIG5 shows a schematic diagram of an optical line channel terminal adjustable protection device in an embodiment of the present disclosure.
  • the optical line channel terminal adjustable protection device 5 includes: a frequency sweep monitoring module 501 and a state determination module 502;
  • the frequency scanning monitoring module 501 when the OLT CT in the initial state supports frequency scanning, the OLT CT scans and runs one or more wavelength channels;
  • the status determination module 502 determines the status of the OLT CT based on the identified events.
  • protection switching is performed in the protection state and the working state by monitoring the uplink transmission method, and the OLT CT supporting frequency scanning generates different protection state migration processes based on different events, thereby realizing adjustable protection OLT CT one-to-many protection switching, thereby increasing the overall versatility of the protection mechanism.
  • the embodiments of the present disclosure also provide an optical line channel terminal adjustable protection system, such as the following embodiments. Since the principle of solving the problem in the system embodiment is similar to that in the above method embodiment, the implementation of the system embodiment can refer to the implementation of the above method embodiment, and the repeated parts will not be repeated.
  • FIG6 shows a schematic diagram of an optical line channel terminal adjustable protection system in an embodiment of the present disclosure.
  • the system includes: a working OLT CT601, an adjustable OLT CT602, and a wavelength router 603.
  • the working OLT CT601 includes: a working OLT CT-1, a working OLT CT-2, a working OLT CT-3 ... a working OLT CT-N;
  • WDM-PON adopts wavelength division multiplexing technology.
  • the PON port of the central office OLT equipment and the user-side terminal ONU equipment each occupy a pair of wavelength channels point-to-point.
  • the number of users that can be connected is several times that of traditional time-division PON. It mainly provides network connections for government and enterprise customers, wireless bearers, etc.
  • the use of WDM-PON can save trunk optical fiber resources and reduce the cost and difficulty of network installation, maintenance and operation.
  • the optical distribution network adopts a point-to-multipoint network structure, which is composed of single-mode optical fiber, wavelength router 603 and other passive devices to realize wavelength-based point-to-point transmission function between trunk and branch optical fibers.
  • the adjustable OLT CT602 can scan the frequencies among the operating wavelength channel pairs one by one according to the preset scanning configuration, that is, adjust its receiving and transmitting wavelengths to the wavelength channels in the operating state, and monitor the upstream signals of each wavelength channel one by one for a period of time.
  • the adjustable OLT CT602 and the working OLT CT601 of each wavelength channel pair are a protection pair; each adjustable OLT CT602 and working OLT CT601 inquires through ICTP whether switching is required, requests the corresponding protection peer to execute protection switching and take over the wavelength channel, shakes hands with the corresponding protection peer to determine the role, etc.
  • ICTP is a protocol for information exchange between OLT CTs at the electrical layer through the background transmission architecture. Such messages are not transmitted through optical channels to ensure the efficiency of communication between OLT CTs.
  • the adjustable OLT CT602 scans the frequencies among the operating wavelength channel pairs one by one according to the preset scanning configuration, that is, adjusts its receiving and transmitting wavelengths to the wavelength channels in the operating state, and monitors the upstream signals of each wavelength channel one by one for a period of time.
  • the adjustable OLT CT602 receives an upstream signal, it indicates that another working OLT CT601 is activated on the wavelength channel pair, and the adjustable OLT CT602 will maintain the scanning process; if the adjustable OLT CT602 does not receive the upstream transmission within a certain period of time, it will stop scanning and migrate to the protection signal loss LOS-P state; if the adjustable OLT CT602 is declared as an activated role, it will stop scanning, tune its receiving and transmitting wavelengths to the wavelength channel pair where the working OLT CT601 that sent the message is located, and migrate to the pre-working state, turn on the transmitter and try to establish a connection with the ONU under the wavelength channel pair.
  • the adjustable OLT CT602 In the help state, if the adjustable OLT CT602 that requests protection switching shows that there is no fault in the transmission link after a specific event, or it is temporarily unable to determine that the fault is caused by the transmission link, the adjustable OLT CT602 will return to the initial state, that is, turn off the transmitter, scan the frequency in the operating channel one by one, monitor the uplink signal, and re-perform one-to-many protection.
  • the WDM-PON system provides the ONUs connected to each branch fiber end with a corresponding fixed working wavelength through the wavelength routing equipment in the optical distribution network.
  • the wavelength is determined by the physical connection and is fixedly allocated based on the wavelength allocation specification of the upstream/downstream transmission of WDM-PON.
  • the uplink signal of each wavelength channel pair is monitored by scanning the frequency of each working wavelength channel pair in the WDM-PON system through the adjustable OLT CT602.
  • the adjustable OLT CT602 performs protection switching, thereby realizing one-to-many protection of the working OLT CT601 by the adjustable OLT CT602.
  • the electronic device 700 according to this embodiment of the present disclosure is described below with reference to Fig. 7.
  • the electronic device 700 shown in Fig. 7 is only an example and should not bring any limitation to the functions and scope of use of the embodiment of the present disclosure.
  • the electronic device 700 is in the form of a general computing device.
  • the components of the electronic device 700 may include but are not limited to: at least one processing unit 710, at least one storage unit 720, and a bus 730 connecting different system components (including the storage unit 720 and the processing unit 710).
  • the storage unit stores program codes, which can be executed by the processing unit 710, so that the processing unit 710 executes the steps described in the above “exemplary method” section of this specification according to various exemplary embodiments of the present disclosure.
  • the processing unit 710 can execute the following steps of the above method embodiment: when the OLT CT in the initial state supports frequency scanning, the OLT CT scans one or more wavelength channels in operation, and determines the state of the OLT CT based on the identified events.
  • the processing unit 710 may execute the following steps of the above method embodiment: when the OLT CT supports frequency scanning, the OLT CT in the initial state scans and monitors one or more wavelength channels in operation, and when the identification event is reception of an uplink signal, the initial state is maintained; when the identification event is failure to receive an uplink burst, it is determined to be a signal loss state in protection, and a message is sent to the corresponding protection peer to inquire whether switching is required; when the identification event is an activation event, it is determined to be a pre-working state to attempt to establish a connection between the ONUs corresponding to the wavelength channel; when the OLT CT is in the working state, it does not receive an uplink transmission and continues to attempt downlink transmission.
  • the OLT CT After not receiving an uplink burst response, it enters a help state and sends a second ICTP message for requesting the corresponding protection peer to perform protection switching and take over the wavelength channel.
  • the state of the OLT CT is determined to be the initial state.
  • the storage unit 720 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit.
  • the memory unit (RAM) 7201 and/or cache memory unit 7202 may further include a read-only memory unit (ROM) 7203.
  • the storage unit 720 may also include a program/utility 7204 having a set (at least one) of program modules 7205, such program modules 7205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.
  • program modules 7205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.
  • Bus 730 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.
  • the electronic device 700 may also communicate with one or more external devices 740 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable a user to interact with the electronic device 700, and/or any device that enables the electronic device 700 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed through an input/output (I/O) interface 750.
  • the electronic device 700 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and/or a public network, such as the Internet) through a network adapter 760.
  • networks e.g., a local area network (LAN), a wide area network (WAN), and/or a public network, such as the Internet
  • the network adapter 760 communicates with other modules of the electronic device 700 via the bus 730. It should be understood that, although not shown in the figure, other hardware and/or software modules can be used in conjunction with the electronic device 700, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.
  • the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation of the present disclosure.
  • a non-volatile storage medium which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.
  • a computing device which can be a personal computer, a server, a terminal device, or a network device, etc.
  • a computer-readable storage medium is also provided, which may be a readable signal medium or a readable storage medium.
  • a program product capable of implementing the above method of the present disclosure is stored thereon.
  • various aspects of the present disclosure may also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to cause the terminal device to execute the steps according to various exemplary implementations of the present disclosure described in the above “Exemplary Method” section of this specification.
  • the method implements the following steps: when the OLT CT in the initial state supports frequency scanning, the OLT CT scans one or more operating wavelength channels, and determines the state of the OLT CT based on the identified events.
  • the program product in the embodiment of the present disclosure when executed by a processor, the following steps are implemented: when the OLT CT supports frequency scanning, the OLT CT in the initial state scans and monitors one or more wavelength channels in operation, and when the identification event is the reception of an uplink signal, the initial state is maintained; when the identification event is the failure to receive an uplink burst, it is determined to be a signal loss state in protection and a message is sent to the corresponding protection peer to inquire whether switching is required; when the identification event is an activation event, it is determined to be a pre-working state to attempt to establish a connection between the ONUs corresponding to the wavelength channel; when the OLT CT is in the working state, it does not receive an uplink transmission and continues to attempt downlink transmission.
  • the OLT CT After not receiving an uplink burst response, it enters a help state and sends a second ICTP message for requesting the corresponding protection peer to perform protection switching and take over the wavelength channel.
  • the state of the OLT CT is determined to be the initial state.
  • Computer-readable storage media in the present disclosure may include, but are not limited to, an electrical connection having one or more conductors, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or flash memory erasable programmable read-only memory
  • CD-ROM compact disk read-only memory
  • CD-ROM compact disk read-only memory
  • magnetic storage device or any suitable combination of the foregoing.
  • a computer readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, wherein a readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above.
  • a readable signal medium may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.
  • the program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.
  • program codes for performing the operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" or similar programming languages.
  • the program codes may be executed entirely on the user computing device, partially on the user computing device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.
  • the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).
  • LAN local area network
  • WAN wide area network
  • modules or units of the device for action execution are mentioned in the above detailed description, such division is not mandatory.
  • the features and functions of two or more modules or units described above can be embodied in one module or unit.
  • the features and functions of one module or unit described above can be further divided into multiple modules or units. To be specific.
  • the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the method according to the implementation of the present disclosure.
  • a non-volatile storage medium which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.
  • a computing device which can be a personal computer, a server, a mobile terminal, or a network device, etc.

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Abstract

本公开提供了一种光线路信道终端保护方法、装置、电子设备、计算机可读存储介质及计算机程序产品，涉及通信技术领域。该方法包括：当OLT CT支持扫频时，处于初始状态的OLT CT扫描监测运行的一个或多个波长通道，当识别事件为接收到上行信号时，保持初始状态；当识别事件为未接收到上行突发时，确定为保护中信号丢失状态向对应的保护对端发送询问是否需要倒换的消息；当识别事件为激活事件时，确定为预工作状态尝试建立与波长通道对应的ONU之间的连接；当OLT CT为工作状态时，未收到上行传输且继续尝试下行传输未收到上行突发响应后进入求助状态；本公开能够支持可调一对多保护，提高保护机制整体的通用性。

Description

光线路信道终端保护方法及相关设备
本公开基于申请号为202310451264.8、申请日为2023年4月24日、发明名称为《光线路信道终端保护方法、装置、设备及存储介质》的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本公开作为参考。
技术领域
本公开涉及通信技术领域，尤其涉及一种光线路信道终端保护方法、装置、电子设备、计算机可读存储介质及计算机程序产品。
背景技术
WDM-PON(Wavelength Division Multiplexing-Passive Optical Network，波长复用-无源光网络)系统，采用波分复用技术，局端OLT(Optical Line Terminal，光线路终端)设备的PON(Passive Optical Network,无源光网络)端口与用户侧终端ONU(Optical Network Unit，光网络单元)设备各自点对点独占一对波长通道，波长通道之间基于不同的波长通道传输且相互隔离，可调保护OLT CT(Optical Line Terminal Channel Terminal，光线路信道终端)无法直接对所有波长通道对的上行信号进行全局监测，无法实现OLT CT的一对多保护，缺乏机制通用性。
发明内容
本公开提供一种光线路信道终端保护方法、装置、电子设备及计算机可读存储介质，至少在一定程度上克服相关技术中不支持可调一对多保护的问题。
根据本公开的一个方面，提供一种光线路信道终端保护方法，应用于光线路信道终端OLT CT，包括：当处于初始状态的所述OLT CT支持扫频时，所述OLT CT扫描运行的一个或多个波长通道，基于识别到的事件，确定所述OLT CT的状态。
在本公开的一个实施例中，还包括：当所述事件为接收到上行信号时，所述OLT CT的状态保持初始状态继续扫频。
在本公开的一个实施例中，还包括：当所述事件为未接收到上行突发时，所述OLT CT的状态确定为保护中信号丢失状态。
在本公开的一个实施例中，还包括：处于保护中信号丢失状态的所述OLT CT停止扫频，向对应的保护对端发送第一通道终端间协议ICTP消息，其中，所述第一ICTP消息用于询问是否需要倒换。
在本公开的一个实施例中，还包括：当所述事件为激活事件时，所述OLT CT 的状态确定为预工作状态。
在本公开的一个实施例中，还包括：处于预工作状态的所述OLT CT，调谐收发波长到对应的保护对端的波长通道上，打开发射机并尝试建立与所述波长通道对应的ONU之间的连接。
在本公开的一个实施例中，还包括：当处于工作状态的所述OLT CT支持扫频时，在一定时间内未收到上行传输且检测到下属光网络单元ONU突发丢失，进入工作中信号丢失状态。
在本公开的一个实施例中，还包括：处于工作中信号丢失状态的所述OLT CT继续发送下行信号，在一定时间内未收到上行突发响应后进入求助状态。
在本公开的一个实施例中，还包括：处于求助状态的所述OLT CT周期性发送第二ICTP消息，其中，所述第二ICTP消息用于请求对应的保护对端执行保护倒换并接管波长通道。
在本公开的一个实施例中，还包括：当处于求助状态的所述OLT CT接收到上行信号、所述OLT CT为后备角色、或ICTP消息超时时，将所述OLT CT的状态确定为初始状态。
根据本公开的另一个方面，还提供了一种光线路信道终端可调保护装置，包括：
扫频监测模块，当处于初始状态的OLT CT支持扫频时，所述OLT CT扫描运行一个或多个波长通道；
状态确定模块，基于识别到的事件，确定所述OLT CT的状态。
根据本公开的另一个方面，还提供了一种电子设备，包括：处理器；以及存储器，用于存储所述处理器的可执行指令；其中，所述处理器配置为经由执行所述可执行指令来执行上述任意一项所述光线路信道终端保护方法。
根据本公开的另一个方面，还提供了一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现上述任意一项所述的光线路信道终端保护方法。
根据本公开的另一个方面，还提供了一种计算机程序产品，包括计算机程序，所述计算机程序被处理器执行时实现上述的光线路信道终端保护方法。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。显而易见地，下面描述中的附图仅 仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1示出本公开实施例中一种光线路信道终端保护方法流程图；
图2示出本公开实施例中一种支持可调保护OLT CT的保护状态机示意图；
图3示出本公开实施例中一种OLT CT的状态确定方法流程图；
图4示出本公开实施例中又一种OLT CT的状态确定方法流程图；
图5示出本公开实施例中一种光线路信道终端可调保护装置示意图；
图6示出本公开实施例中一种光线路信道终端可调保护系统示意图；
图7示出本公开实施例中一种电子设备的结构框图。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的范例；相反，提供这些实施方式使得本公开将更加全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施方式中。
此外，附图仅为本公开的示意性图解，并非一定是按比例绘制。图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。附图中所示的一些方框图是功能实体，不一定必须与物理或逻辑上独立的实体相对应。可以采用软件形式来实现这些功能实体，或在一个或多个硬件模块或集成电路中实现这些功能实体，或在不同网络和/或处理器装置和/或微控制器装置中实现这些功能实体。
为了便于理解，下面首先对本公开涉及到的几个名词进行解释如下：
OLT CT(Optical Line Terminal Channel Terminal，光线路信道终端)是用于连接光纤干线的终端设备的信道终端设备。
ONU(Optical Network Unit，光网络单元)分为有源光网络单元和无源光网络单元，一般把装有包括光接收机、上行光发射机、多个桥接放大器网络监控的设备叫做光节点。
WDM(Wavelength Division Multiplexing，波长复用)是将载有信息但波长不同的光信号合成一束，沿着单根光纤传输；在发送端经复用器汇合在一起，并耦合到光线路的同一根光纤中进行传输的技术；在接收端，经解复用器将各种不同波长的光信号分开，然后由光接收机作进一步处理以恢复原信号。
PON(Passive Optical Network,无源光网络)主要采用无源光功率分配器将信息送至各用户的技术。
ICTP是一种OLT CT之间通过后台传输架构在电层进行信息交互的协议，该类 消息不经光通道传输。
ODN(Optical Distribution Network，光分配网络)是OLT和ONU之间的光传输物理通道。
下面结合附图及实施例对本示例实施方式进行详细说明。
本公开实施例中提供了一种光线路信道终端保护方法，该方法可以由任意具备计算处理能力的电子设备执行。
图1示出本公开实施例中一种光线路信道终端保护方法流程图，如图1所示，本公开实施例中提供的光线路信道终端保护方法，应用于OLT CT，包括如下步骤：
S102，当处于初始状态的OLT CT支持扫频时，OLT CT扫描运行的一个或多个波长通道；
OLT CT(Optical Line Terminal Channel Terminal，光线路信道终端)是用于连接光纤干线的终端设备的信道终端设备。
在一个实施例中，处于初始状态中的OLT CT支持扫频，该OLT CT可按预设扫频配置在各运行的波长通道对间逐一扫频，即调整其收发波长到运行状态中的各个波长通道，对各波长通道上行信号逐个进行一段时间的监听。
S104，基于识别到的事件，确定OLT CT的状态。
在一个实施例中，初始状态及求助状态中，支持扫频的OLT CT基于不同事件，产生不同保护状态迁移的过程。
在一个实施例中，当事件为接收到上行信号，即该OLT CT接收到上行信号，说明有另一OLT CT在该波长通道对上激活，该OLT CT将保持扫频过程。
在一个实施例中，当事件为未接收到上行突发，即该OLT CT在一定时间内未收到上行传输，将停止扫频，并迁移到保护中信号丢失LOS-P状态，并通过ICTP询问保护对端OLT CT是否需要倒换。
在一个实施例中，当事件为激活事件，即该OLT CT被声明为激活角色，将停止扫频，调谐其收发波长到发送该消息的OLT CT所处的波长通道对上，并迁移到预工作状态，打开发射机并尝试建立与该波长通道对下的ONU之间的连接。
ICTP(Inter Channel Termination Protocol，通道终端间协议)是一种OLT CT之间通过后台传输架构在电层进行信息交互的协议，该类消息不经光通道传输。
在一个实施例中，在保护状态机的求助状态中，若请求保护倒换的该OLT CT支持扫频，在经特定事件说明传输链路无故障、或暂时无法判断故障为该传输链路引起，该OLT CT将返回初始状态，即关闭发射机，并逐一在运行通道对扫频，监测上行信号，重新进行一对多的保护。
上述实施例中，通过监测上行传输的方法在保护状态与工作状态中进行保护倒换，引入OLT CT支持扫频时的相应状态机制和状态迁移方法，支持可调保护OLT  CT一对多保护倒换，增加保护机制整体的通用性。
图2示出本公开实施例中一种支持可调保护OLT CT的保护状态机示意图；图3示出本公开实施例中一种OLT CT的状态确定方法流程图，如图3所示，本公开实施例中提供的OLT CT的状态确定方法，应用于OLT CT，包括如下步骤：
S302，当事件为接收到上行信号时，OLT CT的状态保持初始状态继续扫频。
在一个实施例中，上行信号可为LOS cleared事件，即信号丢失清除事件，当收到上行突发时识别该事件。
S304，当事件为未接收到上行突发时，OLT CT的状态确定为保护中信号丢失状态。
在一个实施例中，处于保护中信号丢失状态的OLT CT停止扫频，向对应的保护对端发送第一通道终端间协议ICTP消息，其中，第一ICTP消息用于询问是否需要倒换。
在一个实施例中，上行突发可为SLOS事件，即简单信号丢失事件，在监测到一定时间的上行方向静默时，该事件在没有下行方向传输发生的状态中被识别。
在一个实施例中，对SLOS、LOS cleared等事件识别时间不做规定。
S306，当事件为激活事件时，OLT CT的状态确定为预工作状态。
在一个实施例中，处于预工作状态的OLT CT，调谐收发波长到对应的保护对端的波长通道上，打开发射机并尝试建立与波长通道对应的ONU之间的连接。
在一个实施例中，当起始计时器超时时，OLT CT的状态确定为预工作状态，人工设置或根据历史数据设置起始计时器的时间，可在OLT CT开始扫频时开始计时。
在一个实施例中，激活事件为经特定ICTP消息声明为激活角色，即Active()，作为ICTP握手的角色分配结果，接收该消息的OLT CT被声明为激活，若该OLT CT支持扫频，将停止扫频，调谐其收发波长到发送该消息的OLT CT所处的波长通道对上。
在一个实施例中，经特定ICTP消息声明为后备角色，即Standby-LOS()，作为ICTP握手的角色分配结果，接收该消息的OLT CT被声明为后备，但被警告避免仅基于没有期望的上行传输导致的定时器超时来执行保护倒换。
S308，当处于工作状态的OLT CT支持扫频时，在一定时间内未收到上行传输且检测到下属光网络单元ONU突发丢失，进入工作中信号丢失状态；处于工作中信号丢失状态的所述OLT CT继续发送下行信号，在一定时间内未收到上行突发响应后进入求助状态，当OLT CT满足一定条件时，将OLT CT的状态确定为初始状态。
在一个实施例中，处于求助状态的OLT CT周期性发送第二ICTP消息，其中，第二ICTP消息用于请求对应的保护对端执行保护倒换并接管波长通道；
在一个实施例中，当经保护倒换处于工作状态的该可调保护OLT CT在一定时间内未收到上行传输，宣告下属ONU突发丢失，且继续尝试下行传输仍在一定时间内未收到上行突发响应后进入求助状态，发送第二ICTP消息请求保护对端执行保护倒换并接管波长通道。
在一个实施例中，求助状态的OLT CT停止ICTP交互定时器对ICTP消息进行计时，若请求保护倒换的该OLT CT支持扫频，在经特定事件说明传输链路无故障、或暂时无法判断故障为该传输链路引起，该OLT CT将返回初始状态，即关闭发射机，并逐一在运行通道对扫频，监测上行信号，重新进行一对多的保护；特定事件包括但不限于：LOS cleared、ICTP消息超时、Standby-LOS()等，即当OLT CT接收到上行信号、OLT CT为后备角色、或ICTP消息超时时，将OLT CT的状态确定为初始状态。
表1为光线路信道终端保护方法中涉及的相应保护状态机状态
上述实施例中，通过监测上行传输的方法在保护状态与工作状态中进行保护倒换，引入OLT CT支持扫频时的相应状态机制和状态迁移方法，适配WDM-PON的特点，支持可调保护OLT CT一对多保护倒换，增加保护机制整体的通用性。
图4示出本公开实施例中又一种OLT CT的状态确定方法流程图，如图4所示，本公开实施例中提供的OLT CT的状态确定方法，应用于光线路信道终端OLT CT， 包括如下步骤：
S402，当OLT CT不支持扫频时，周期性发送第一ICTP消息与对应的保护对端握手；
S404，基于OLT CT的状态及初始角色确定OLT CT的角色。
在一个实施例中，当OLT CT不支持扫频时，进入初始状态的OLT CT首先与其保护对端OLT CT进行ICTP握手确认在保护分配中生效的角色，即激活角色或备用角色。
S406，OLT CT不支持扫频时，初始状态的OLT CT收到上行信号，OLT CT确定为预保护状态；
在一个实施例中，当初始状态的OLT CT收到上行传输时，说明保护对端OLT CT在该波长通道对上激活，该OLT CT进入预保护状态，继续进行握手，关闭起始定时器，开启ICTP交互定时器在ICTP基础设施故障时确保状态机的进展。
S408，初始状态的OLT CT为后备角色，OLT CT确定为保护状态。
在一个实施例中，初始状态的OLT CT经特定ICTP消息声明为后备角色，将直接进入保护状态。
S410，保护状态的OLT CT在一定时间内未收到上行传输且检测到下属ONU突发丢失，确定为保护中信号丢失状态，若保护对端对OLT CT恢复了传输，则OLT CT返回保护状态。
在一个实施例中，处于保护状态中的该OLT CT会持续对本通道对的上行信号进行监听，若在一定时间内未接收到上行突发，该OLT CT会进入保护中信号丢失LOS-P状态，向保护对端OLT CT询问潜在的保护角色切换，若该OLT CT恢复了传输，则该OLT CT会返回保护状态。
S412，OLT CT为激活角色时，将进入预工作状态；
S414，预工作状态的OLT CT收到上行传输确认时，将进入工作状态。
在一个实施例中，若该OLT CT经特定ICTP消息声明为激活角色，将进入预工作状态，通过发送下行传输尝试与该通道对的下属ONU建立连，一旦收到了上行传输确认，将进入工作状态。
S416，工作状态的OLT CT在一定时间内没收到上行传输，进入工作中信号丢失状态；
S418，工作中信号丢失状态的OLT CT继续尝试下行传输，若在一定时间内没有上行突发响应，OLT CT进入求助状态。
在一个实施例中，当经保护倒换处于工作状态的该OLT CT若在一定时间内没收到上行传输，且宣告下属ONU突发丢失，将进入工作中信号丢失LOS-W状态，继续尝试下行传输，若在一定时间内仍没有上行突发响应，那么该OLT CT将进入 求助状态，通过ICTP消息请求保护对端保护倒换。
在一个实施例中，求助状态中，若请求保护倒换的该OLT CT支持扫频，在经特定事件说明传输链路无故障、或暂时无法判断故障为该传输链路引起，该OLT CT将进入保护状态，特定事件包括但不限于：LOS cleared、ICTP消息超时、Standby-LOS()等。
S420，当OLT CT没有收到响应自身下行传输或上行传输确认时，将进入通常错误状态。
在一个实施例中，当OLT CT没有收到响应自身下行传输或保护对端OLT CT已确认的上行流量，将进入通常错误状态，此时可能发生了光纤或光收发器的故障。
S422，当OLT CT检测到执行保护倒换的设备故障时，将进入设备错误状态；
设备错误状态的OLT CT在错误排除后通过网管控制进入初始状态；
处于设备错误状态且不支持扫频的OLT CT在错误排除且接收到上行突发进入预保护状态。
在一个实施例中，当OLT CT检测到一个需要立即执行保护倒换的主要本地设备的故障，将进入设备错误状态；处于设备错误状态的该OLT CT将在错误排除后通过网管控制进行重新初始化进入初始状态；处于通常错误状态的该OLT CT在故障排除后可进入初始状态，如果接收到上行突发，可直接进入预保护状态。
上述实施例中，OLT CT与其保护对端OLT CT之间基于监测所处波长通道的上行信号接收状况并通过ICTP消息交互进行工作角色的切换，从而进行工作OLT CT的保护倒换，也可以通过可调保护OLT CT在WDM-PON系统的各个工作波长通道对进行扫频的方式对各个波长通道对的上行信号进行监测，从而实现可调保护OLT CT对工作OLT CT一对多的保护。
基于同一发明构思，本公开实施例中还提供了一种光线路信道终端可调保护装置，如下面的实施例。由于该装置实施例解决问题的原理与上述方法实施例相似，因此该装置实施例的实施可以参见上述方法实施例的实施，重复之处不再赘述。
图5示出本公开实施例中一种光线路信道终端可调保护装置示意图，如图5所示，该光线路信道终端可调保护装置5包括：扫频监测模块501、状态确定模块502；
扫频监测模块501，当处于初始状态的OLT CT支持扫频时，OLT CT扫描运行一个或多个波长通道；
状态确定模块502，基于识别到的事件，确定OLT CT的状态。
上述实施例中，通过监测上行传输的方法在保护状态与工作状态中进行保护倒换，支持扫频的OLT CT基于不同事件，产生不同保护状态迁移的过程，实现可调保护OLT CT一对多保护倒换，增加保护机制整体的通用性。
基于同一发明构思，本公开实施例中还提供了一种光线路信道终端可调保护系统，如下面的实施例。由于该系统实施例解决问题的原理与上述方法实施例相似，因此该系统实施例的实施可以参见上述方法实施例的实施，重复之处不再赘述。
图6示出本公开实施例中一种光线路信道终端可调保护系统示意图，如图6所示，该系统包括：工作OLT CT601、可调OLT CT602、波长路由器603，工作OLT CT601包括：工作OLT CT-1、工作OLT CT-2、工作OLT CT-3…工作OLT CT-N；
WDM-PON采用波分复用技术，局端OLT设备的PON端口与用户侧终端ONU设备各自点对点独占一对波长通道，可接入用户数是传统时分PON的数倍，主要为政企客户、无线承载等提供网络连接，使用WDM-PON可以节省主干光纤资源，降低网络的装维和运行成本与难度；在WDM-PON中，光分配网络采用点到多点的网络结构，由单模光纤、波长路由器603等无源器件组成，实现主干与分支光纤之间基于波长的点对点传输功能。
可调OLT CT602可按预设扫频配置在各运行的波长通道对间逐一扫频，即调整其收发波长到运行状态中的各个波长通道，对各波长通道上行信号逐个进行一段时间的监听，此时该可调OLT CT602与各个波长通道对的工作OLT CT601为保护对；各可调OLT CT602、工作OLT CT601通过ICTP询问是否需要倒换、请求对应的保护对端执行保护倒换并接管波长通道、与对应的保护对端握手确定角色等，ICTP是一种OLT CT之间通过后台传输架构在电层进行信息交互的协议，该类消息不经光通道传输，保证OLT CT之间通信的效率。
初始状态中的可调OLT CT602按预设扫频配置在各运行的波长通道对间逐一扫频，即调整其收发波长到运行状态中的各个波长通道，对各波长通道上行信号逐个进行一段时间的监听，若该可调OLT CT602接收到上行信号，说明有另一工作OLT CT601在该波长通道对上激活，该可调OLT CT602将保持扫频过程；若该可调OLT CT602在一定时间内未收到上行传输，将停止扫频，并迁移到保护中信号丢失LOS-P状态；若该可调OLT CT602被声明为激活角色，将停止扫频，调谐其收发波长到发送该消息的工作OLT CT601所处的波长通道对上，并迁移到预工作状态，打开发射机并尝试建立与该波长通道对下的ONU之间的连接。
求助状态中若请求保护倒换的该可调OLT CT602在经特定事件说明传输链路无故障、或暂时无法判断故障为该传输链路引起，该可调OLT CT602将返回初始状态，即关闭发射机，并逐一在运行通道对扫频，监测上行信号，重新进行一对多的保护。
WDM-PON系统通过光分配网络中的波长路由设备为各个分支光纤端所连接的ONU提供对应的固定工作波长，该波长由物理连接决定，并基于WDM-PON的上行/下行传输的波长分配规范进行固定分配。
上述实施例中，考虑到WDM-PON系统中，OLT CT之间基于物理连接划分独立的波长通道与各自下属的ONU进行点对点通信的特点，通过可调OLT CT602在WDM-PON系统的各个工作波长通道对进行扫频的方式对各个波长通道对的上行信号进行监测，当工作OLT CT601在其无法与下属ONU进行正常传输时通过该可调OLT CT602进行保护倒换，从而实现可调OLT CT602对工作OLT CT601一对多的保护。
本领域技术人员可以知晓，图6中的工作OLT CT601、可调OLT CT602和波长路由器603的数量仅仅是示意性的，根据实际需要，可以具有任意数目的工作OLT CT601、可调OLT CT602和波长路由器603。本公开实施例对此不作限定。
所属技术领域的技术人员能够理解，本公开的各个方面可以实现为系统、方法或程序产品。因此，本公开的各个方面可以具体实现为以下形式，即：完全的硬件实施方式、完全的软件实施方式(包括固件、微代码等)，或硬件和软件方面结合的实施方式，这里可以统称为“电路”、“模块”或“系统”。
下面参照图7来描述根据本公开的这种实施方式的电子设备700。图7显示的电子设备700仅仅是一个示例，不应对本公开实施例的功能和使用范围带来任何限制。
如图7所示，电子设备700以通用计算设备的形式表现。电子设备700的组件可以包括但不限于：上述至少一个处理单元710、上述至少一个存储单元720、连接不同系统组件(包括存储单元720和处理单元710)的总线730。
其中，所述存储单元存储有程序代码，所述程序代码可以被所述处理单元710执行，使得所述处理单元710执行本说明书上述“示例性方法”部分中描述的根据本公开各种示例性实施方式的步骤。
例如，所述处理单元710可以执行上述方法实施例的如下步骤：当处于初始状态的OLT CT支持扫频时，OLT CT扫描运行的一个或多个波长通道，基于识别到的事件，确定OLT CT的状态。
例如，所述处理单元710可以执行上述方法实施例的如下步骤：当OLT CT支持扫频时，处于初始状态的OLT CT扫描监测运行的一个或多个波长通道，当识别事件为接收到上行信号时，保持初始状态；当识别事件为未接收到上行突发时，确定为保护中信号丢失状态向对应的保护对端发送询问是否需要倒换的消息；当识别事件为激活事件时，确定为预工作状态尝试建立与波长通道对应的ONU之间的连接；当OLT CT为工作状态时，未收到上行传输且继续尝试下行传输未收到上行突发响应后进入求助状态，发送用于请求对应的保护对端执行保护倒换并接管波长通道的第二ICTP消息，当满足一定条件时，将OLT CT的状态确定为初始状态。
存储单元720可以包括易失性存储单元形式的可读介质，例如随机存取存储单 元(RAM)7201和/或高速缓存存储单元7202，还可以进一步包括只读存储单元(ROM)7203。
存储单元720还可以包括具有一组(至少一个)程序模块7205的程序/实用工具7204，这样的程序模块7205包括但不限于：操作系统、一个或者多个应用程序、其它程序模块以及程序数据，这些示例中的每一个或某种组合中可能包括网络环境的实现。
总线730可以为表示几类总线结构中的一种或多种，包括存储单元总线或者存储单元控制器、外围总线、图形加速端口、处理单元或者使用多种总线结构中的任意总线结构的局域总线。
电子设备700也可以与一个或多个外部设备740(例如键盘、指向设备、蓝牙设备等)通信，还可与一个或者多个使得用户能与该电子设备700交互的设备通信，和/或与使得该电子设备700能与一个或多个其它计算设备进行通信的任何设备(例如路由器、调制解调器等等)通信。这种通信可以通过输入/输出(I/O)接口750进行。并且，电子设备700还可以通过网络适配器760与一个或者多个网络(例如局域网(LAN)，广域网(WAN)和/或公共网络，例如因特网)通信。
如图所示，网络适配器760通过总线730与电子设备700的其它模块通信。应当明白，尽管图中未示出，可以结合电子设备700使用其它硬件和/或软件模块，包括但不限于：微代码、设备驱动器、冗余处理单元、外部磁盘驱动阵列、RAID系统、磁带驱动器以及数据备份存储系统等。
通过以上的实施方式的描述，本领域的技术人员易于理解，这里描述的示例实施方式可以通过软件实现，也可以通过软件结合必要的硬件的方式来实现。因此，根据本公开实施方式的技术方案可以以软件产品的形式体现出来，该软件产品可以存储在一个非易失性存储介质(可以是CD-ROM，U盘，移动硬盘等)中或网络上，包括若干指令以使得一台计算设备(可以是个人计算机、服务器、终端装置、或者网络设备等)执行根据本公开实施方式的方法。
在本公开的示例性实施例中，还提供了一种计算机可读存储介质，该计算机可读存储介质可以是可读信号介质或者可读存储介质。其上存储有能够实现本公开上述方法的程序产品。在一些可能的实施方式中，本公开的各个方面还可以实现为一种程序产品的形式，其包括程序代码，当所述程序产品在终端设备上运行时，所述程序代码用于使所述终端设备执行本说明书上述“示例性方法”部分中描述的根据本公开各种示例性实施方式的步骤。
例如，本公开实施例中的程序产品被处理器执行时实现如下步骤的方法：当处于初始状态的OLT CT支持扫频时，OLT CT扫描运行的一个或多个波长通道，基于识别到的事件，确定OLT CT的状态。
例如，本公开实施例中的程序产品被处理器执行时实现如下步骤的方法：当OLT CT支持扫频时，处于初始状态的OLT CT扫描监测运行的一个或多个波长通道，当识别事件为接收到上行信号时，保持初始状态；当识别事件为未接收到上行突发时，确定为保护中信号丢失状态向对应的保护对端发送询问是否需要倒换的消息；当识别事件为激活事件时，确定为预工作状态尝试建立与波长通道对应的ONU之间的连接；当OLT CT为工作状态时，未收到上行传输且继续尝试下行传输未收到上行突发响应后进入求助状态，发送用于请求对应的保护对端执行保护倒换并接管波长通道的第二ICTP消息，当满足一定条件时，将OLT CT的状态确定为初始状态。
本公开中的计算机可读存储介质的更具体的例子可以包括但不限于：具有一个或多个导线的电连接、便携式计算机磁盘、硬盘、随机访问存储器(RAM)、只读存储器(ROM)、可擦式可编程只读存储器(EPROM或闪存)、光纤、便携式紧凑磁盘只读存储器(CD-ROM)、光存储器件、磁存储器件、或者上述的任意合适的组合。
在本公开中，计算机可读存储介质可以包括在基带中或者作为载波一部分传播的数据信号，其中承载了可读程序代码。这种传播的数据信号可以采用多种形式，包括但不限于电磁信号、光信号或上述的任意合适的组合。可读信号介质还可以是可读存储介质以外的任何可读介质，该可读介质可以发送、传播或者传输用于由指令执行系统、装置或者器件使用或者与其结合使用的程序。
可选地，计算机可读存储介质上包含的程序代码可以用任何适当的介质传输，包括但不限于无线、有线、光缆、RF等等，或者上述的任意合适的组合。
在具体实施时，可以以一种或多种程序设计语言的任意组合来编写用于执行本公开操作的程序代码，所述程序设计语言包括面向对象的程序设计语言—诸如Java、C++等，还包括常规的过程式程序设计语言—诸如“C”语言或类似的程序设计语言。程序代码可以完全地在用户计算设备上执行、部分地在用户设备上执行、作为一个独立的软件包执行、部分在用户计算设备上部分在远程计算设备上执行、或者完全在远程计算设备或服务器上执行。
在涉及远程计算设备的情形中，远程计算设备可以通过任意种类的网络，包括局域网(LAN)或广域网(WAN)，连接到用户计算设备，或者，可以连接到外部计算设备(例如利用因特网服务提供商来通过因特网连接)。
应当注意，尽管在上文详细描述中提及了用于动作执行的设备的若干模块或者单元，但是这种划分并非强制性的。实际上，根据本公开的实施方式，上文描述的两个或更多模块或者单元的特征和功能可以在一个模块或者单元中具体化。反之，上文描述的一个模块或者单元的特征和功能可以进一步划分为由多个模块或者单元 来具体化。
此外，尽管在附图中以特定顺序描述了本公开中方法的各个步骤，但是，这并非要求或者暗示必须按照该特定顺序来执行这些步骤，或是必须执行全部所示的步骤才能实现期望的结果。附加的或备选的，可以省略某些步骤，将多个步骤合并为一个步骤执行，以及/或者将一个步骤分解为多个步骤执行等。
通过以上实施方式的描述，本领域的技术人员易于理解，这里描述的示例实施方式可以通过软件实现，也可以通过软件结合必要的硬件的方式来实现。因此，根据本公开实施方式的技术方案可以以软件产品的形式体现出来，该软件产品可以存储在一个非易失性存储介质(可以是CD-ROM，U盘，移动硬盘等)中或网络上，包括若干指令以使得一台计算设备(可以是个人计算机、服务器、移动终端、或者网络设备等)执行根据本公开实施方式的方法。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本公开旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。

Claims (11)

  1. 一种光线路信道终端保护方法，其中，应用于光线路信道终端OLT CT，包括：
    当处于初始状态的所述OLT CT支持扫频时，所述OLT CT扫描运行的一个或多个波长通道，基于识别到的事件，确定所述OLT CT的状态。
  2. 根据权利要求1所述的光线路信道终端保护方法，其中，还包括：
    当所述事件为接收到上行信号时，所述OLT CT的状态保持初始状态继续扫频。
  3. 根据权利要求1所述的光线路信道终端保护方法，其中，还包括：
    当所述事件为未接收到上行突发时，所述OLT CT的状态确定为保护中信号丢失状态。
  4. 根据权利要求3所述的光线路信道终端保护方法，其中，还包括：
    处于保护中信号丢失状态的所述OLT CT停止扫频，向对应的保护对端发送第一通道终端间协议ICTP消息，其中，所述第一ICTP消息用于询问是否需要倒换。
  5. 根据权利要求1所述的光线路信道终端保护方法，其中，还包括：
    当所述事件为激活事件时，所述OLT CT的状态确定为预工作状态。
  6. 根据权利要求5所述的光线路信道终端保护方法，其中，还包括：
    处于预工作状态的所述OLT CT，调谐收发波长到对应的保护对端的波长通道上，打开发射机并尝试建立与所述波长通道对应的ONU之间的连接。
  7. 根据权利要求1所述的光线路信道终端保护方法，其中：还包括：
    当处于求助状态的所述OLT CT支持扫频，在接收到上行信号、所述OLT CT为后备角色、或ICTP消息超时时，将所述OLT CT的状态确定为初始状态。
  8. 一种光线路信道终端可调保护装置，其中，包括：
    扫频监测模块，当处于初始状态的OLT CT支持扫频时，所述OLT CT扫描运行一个或多个波长通道；
    状态确定模块，基于识别到的事件，确定所述OLT CT的状态。
  9. 一种电子设备，其中，包括：
    处理器；以及
    存储器，用于存储所述处理器的可执行指令；
    其中，所述处理器配置为经由执行所述可执行指令来执行权利要求1～7中任意一项所述光线路信道终端保护方法。
  10. 一种计算机可读存储介质，其上存储有计算机程序，其中，所述计算机程序被处理器执行时实现权利要求1～7中任意一项所述的光线路信道终端保护方法。
  11. 一种计算机程序产品，包括计算机程序，其中，所述计算机程序被处理器 执行时实现权利要求1～7任一项所述的光线路信道终端保护方法。
PCT/CN2023/139402 2023-04-24 2023-12-18 光线路信道终端保护方法及相关设备 Ceased WO2024221978A1 (zh)

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