WO2024017022A1 - Procédé de restauration de topologie, premier réseau optique et appareil de communication - Google Patents

Procédé de restauration de topologie, premier réseau optique et appareil de communication Download PDF

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Publication number
WO2024017022A1
WO2024017022A1 PCT/CN2023/104731 CN2023104731W WO2024017022A1 WO 2024017022 A1 WO2024017022 A1 WO 2024017022A1 CN 2023104731 W CN2023104731 W CN 2023104731W WO 2024017022 A1 WO2024017022 A1 WO 2024017022A1
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WIPO (PCT)
Prior art keywords
optical fiber
fiber splitter
port
dispersion
optical
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PCT/CN2023/104731
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English (en)
Chinese (zh)
Inventor
吴逸文
张阔
刘耕辰
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华为技术有限公司
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Publication of WO2024017022A1 publication Critical patent/WO2024017022A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • 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
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/009—Topology aspects

Definitions

  • the present application relates to the field of optical communication technology, and in particular, to a topology restoration method, a first optical network and a communication device.
  • PON passive optical network
  • OLT optical line terminal
  • ODN optical distribution network
  • user-side optical network It is composed of a terminal (optical network unit, ONU).
  • the OLT is connected to the ONU through one or more levels of optical fiber splitters in the ODN.
  • the devices in PON are all passive devices, and it is difficult for the transmitted optical signal to reflect the information of the device through which the optical signal passes. Therefore, it is difficult to restore the topology of the PON based on the optical signal transmitted in the PON. Relying on manual arranging is very inefficient.
  • the present application provides a topology restoration method, a first optical network and a communication device to solve the problem that the topology structure of PON is difficult to restore.
  • this application provides a topology restoration method, applied to a first optical network.
  • the first optical network may include at least one central office device and at least one user device, at least one central office device and at least one user device.
  • the optical fibers for device communication are connected through at least one optical fiber splitter.
  • the dispersion device is used to introduce additional dispersion values. , the dispersion values introduced by dispersion devices on different optical paths are different.
  • the topology restoration method includes: the first user terminal device may determine that the dispersion value of the first optical signal received from the first central office device is the first dispersion value ⁇ 1.
  • the first user equipment may determine the identity of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2. Afterwards, the first user equipment can send the identification of the optical fiber splitter port through which the first optical signal passes to the target central office equipment. The identification of the optical fiber splitter port through which the first optical signal passes is used to determine the topology of the first optical network. structure.
  • the second dispersion value ⁇ 2 is the dispersion value when the first optical signal is transmitted from the first central office equipment to the first user equipment when no additional dispersion value is introduced on the first optical path.
  • the first user-end device belongs to at least one user-end device
  • the first central office device belongs to at least one central office device.
  • the first optical path is an optical path between the first optical fiber splitter and the first user-end equipment
  • the first optical fiber splitter is an optical fiber splitter adjacent to the first central office equipment.
  • the target central office device is the first central office device or at least one central office device other than the first central office device.
  • the first user equipment can determine the first dispersion difference value of the first optical signal when an additional dispersion value is introduced on the first optical path and when no additional dispersion value is introduced, and the first dispersion difference value is the first optical signal Dispersion devices on the passing optical path introduced. Since the dispersion components on different optical paths introduce different values, the identity of the optical fiber splitter port through which the first optical signal passes can be determined based on the first dispersion difference value. Further, the target central office device can determine the first optical network topology based on the identification of the optical fiber splitter port through which the first optical signal passes determined by each first user device. Moreover, since the dispersion device that introduces the dispersion value is relatively cheap, the implementation cost of this solution is low.
  • the first optical network can be a PON
  • the central office equipment can be an OLT
  • the user equipment can be an ONU.
  • this topology restoration method can be used to restore the topology structure of PON.
  • the first user equipment determines the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2
  • the identification may specifically include: first, the first user terminal device queries the first relationship table, and the first relationship table includes a mapping relationship between the dispersion value and the identification of the optical fiber splitter port. Afterwards, the first user equipment may determine the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table as the identification of the optical fiber splitter port through which the first optical signal passes.
  • the first user-side device can easily determine the information of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference value.
  • the requirements for the first user-side device are not high and the implementation is simple.
  • the first optical fiber splitter is also an optical fiber splitter adjacent to the first user terminal equipment.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table may include an identification of the first port, which is a port in the first optical fiber splitter connected to the first user equipment.
  • the first dispersion difference can be between the first optical fiber splitter and the first user equipment.
  • the dispersion value introduced by the dispersion device is also an optical fiber splitter adjacent to the first user equipment.
  • the optical fiber splitter between the first central office equipment and the first user equipment includes a first optical fiber splitter and a second optical fiber splitter, and the second optical fiber splitter
  • the beam splitter is a fiber optic beam splitter adjacent the first customer premises equipment.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes the identification of the second port and/or the identification of the third port, and the identification of the fourth port, where the second port is the first
  • the port in the optical fiber splitter that is connected to the second optical fiber splitter the third port is the port in the second optical fiber splitter that is connected to the first optical fiber splitter
  • the fourth port is the port in the second optical fiber splitter that is connected to the first optical fiber splitter.
  • the dispersion value introduced by the dispersion device on the optical path between the first optical fiber splitter and the second optical fiber splitter is the fourth dispersion value ⁇ 4, and the dispersion value on the optical path between the second optical fiber splitter and the first user equipment
  • the first dispersion difference value may be equal to the dispersion value introduced by the dispersion device between the first fiber splitter and the second fiber splitter plus the dispersion value between the second fiber splitter and the first user equipment.
  • the dispersion value introduced by the dispersion device may be equal to the dispersion value introduced by the dispersion device between the first fiber splitter and the second fiber splitter plus the dispersion value between the second fiber splitter and the first user equipment.
  • the first dispersion difference value is equal to the dispersion value additionally introduced by the dispersion device on the optical path between the first central office equipment and the first user-end equipment.
  • the optical fiber splitter sent by the first user-end equipment to the target central office equipment The identification of the optical fiber splitter port is: the identification of the optical fiber splitter port through which the first optical signal passes from the first central office equipment to the first user equipment.
  • the first optical fiber splitter when there is no dispersion device on the second optical path between the first central office equipment and the first optical fiber splitter, the first optical fiber splitter does not Connect to other central office equipment except the first central office equipment.
  • a dispersion device may be present on the second optical path between the first central office equipment and the first optical fiber splitter.
  • Situations that do not introduce additional dispersion values on the first optical path may include: first The case where no additional dispersion value is introduced on the optical path, and additional dispersion value is introduced on the second optical path.
  • the first dispersion difference value is the dispersion value additionally introduced by the dispersion device on the optical path between the first optical fiber splitter and the first user equipment, then the first user equipment sends to the target central office equipment
  • the identification of the optical fiber splitter port is: the identification of the optical fiber splitter port through which the first optical signal passes from the first optical fiber splitter to the first user terminal device.
  • the topology restoration method may further include: the first user-side device may also send a second optical signal to the first central office device. Furthermore, the first user-end device may also receive an identification of the fifth port through which the second optical signal from the first central office device passes. Among them, the fifth port is the port in the first optical fiber splitter connected to the first office equipment. The dispersion value introduced by the dispersion device on the second optical path is the sixth dispersion value ⁇ 6. The logo of the fifth port is the first office equipment. The end device is determined based on the sixth dispersion value ⁇ 6. Further, the first client device may also send the identification of the fifth port to the target central office device.
  • the first user equipment after the first user equipment sends to the target central office equipment the identification of the optical fiber splitter port through which the first optical signal passes from the first optical fiber splitter to the first user equipment, it can also send the target data to the target central office equipment.
  • the central office equipment sends the first optical fiber splitter to the identification of the optical fiber splitter port through which the first central office equipment passes.
  • the first optical fiber splitter may also be an optical fiber splitter adjacent to the first user-end equipment, between the first central office equipment and the first optical fiber splitter. There may be a dispersion device on the second optical path between the two.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table may include an identification of the fifth port and an identification of the first port.
  • the fifth port is a port in the first optical fiber splitter connected to the first central office device, and the first port is a port in the first optical fiber splitter connected to the first user end device.
  • the optical fiber splitter between the first central office equipment and the first user equipment may include a first optical fiber splitter and a second optical fiber splitter, and a second optical fiber splitter.
  • the optical fiber splitter may be an optical fiber splitter adjacent to the first user-end equipment, and a dispersion device may be present on the second optical path between the first central office equipment and the first optical fiber splitter.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes the identification of the fifth port, the identification of the second port and/or the identification of the third port, and the identification of the fourth port; wherein,
  • the fifth port is a port in the first optical fiber splitter connected to the first central office device
  • the second port is a port in the first optical fiber splitter connected to the second optical fiber splitter
  • the third port is the second optical fiber
  • the port in the beam splitter is connected to the first optical fiber splitter
  • the fourth port is the port in the second optical fiber splitter connected to the first user equipment.
  • the dispersion value introduced by the dispersion device on the second optical path is the sixth dispersion value ⁇ 6, and the dispersion value introduced by the dispersion device on the optical path between the first optical fiber beam splitter and the second optical fiber splitter is the fourth dispersion value ⁇ 4,
  • the dispersion value introduced by the dispersion device on the optical path between the second optical fiber splitter and the first user-end equipment is the fifth dispersion value ⁇ 5.
  • no additional dispersion value is introduced on the first optical path.
  • the situation may include: no additional dispersion value is introduced on the first optical path, and no additional dispersion value is introduced on the second optical path.
  • ⁇ 2 first optical fiber dispersion coefficient ⁇ first length
  • the first optical fiber dispersion coefficient is the optical fiber of the optical fiber used for communication between the first central office device and the first user end device.
  • the first length of the dispersion coefficient is the length of the optical fiber through which the first optical signal is transmitted from the first central office equipment to the first user equipment.
  • the coefficient is the optical fiber dispersion coefficient of the optical fiber between the first central office equipment and the first user equipment
  • the first length is the first optical signal transmitted from the first central office equipment to The length of the optical fiber passed by the first user equipment.
  • the first optical fiber splitter can also be connected to other central office equipment except the first central office equipment.
  • two central office devices can be connected to the same optical fiber splitter.
  • the present application provides a topology restoration method, applied to a first optical network.
  • the first optical network may include at least one central office device and at least one user device, at least one central office device and at least one user device.
  • the optical fibers for device communication are connected through at least one optical fiber splitter.
  • the dispersion device is used to introduce additional dispersion values. , the dispersion values introduced by dispersion devices on different optical paths are different.
  • the topology restoration method includes: the target central office equipment receives the identification of the optical fiber splitter port through which the first optical signal from the first user equipment passes.
  • the target central office equipment can determine the topology structure of the first optical network based on the identification of the optical fiber splitter port through which the first optical signal passes.
  • the first optical signal is an optical signal sent by the first central office device to the first user device, the first user device belongs to at least one user device, the first central device belongs to at least one central device, and the target central device
  • the device is a first central office device or a central office device other than the first central office device among at least one central office device.
  • the target central office equipment can receive the identification of the optical fiber splitter port through which the first optical signal from the first user equipment passes. Since the first user equipment can be any user equipment in the first optical network, the target central office equipment can obtain the identification of the optical fiber splitter port through which the first optical signal from each user equipment passes. Furthermore, the target central office device can determine the topology structure of the first optical network.
  • the first optical network can be a PON
  • the central office equipment can be an OLT
  • the user equipment can be an ONU.
  • this topology restoration method can be used to restore the topology structure of PON.
  • the optical fiber splitter between the first central office equipment and the first user equipment includes a first optical fiber splitter, and the first optical fiber splitter is connected to the first optical fiber splitter.
  • the first optical fiber splitter is an optical fiber splitter adjacent to the central office equipment, and the first optical fiber splitter is also an optical fiber splitter adjacent to the first user equipment.
  • the identification of the optical fiber splitter port through which the first optical signal sent from the first user equipment passes may include the identification of the first port.
  • the first port is a port of the first optical fiber splitter that is connected to the first user equipment, and the first optical fiber splitter is an optical fiber splitter adjacent to the first central office equipment.
  • the optical fiber splitter between the first central office equipment and the first user equipment includes a first optical fiber splitter and a second optical fiber splitter.
  • the beam splitter is an optical fiber splitter adjacent to the first central office equipment
  • the second optical fiber splitter is an optical fiber splitter adjacent to the first user end equipment.
  • the identification of the optical fiber splitter port through which the first optical signal sent from the first user terminal device passes may include the identification of the second port, the identification of the third port, and the identification of the fourth port.
  • the second port is a port of the first optical fiber splitter connected to the second optical fiber splitter
  • the third port is a port of the second optical fiber splitter connected to the first optical fiber splitter
  • the fourth port is A port in the second optical fiber splitter connected to the first user equipment.
  • the identification of the optical fiber splitter port through which the first optical signal sent from the first user-end device passes may include the path through which the first optical signal passes from the first optical fiber splitter to the first user-end device. Identification of the fiber splitter port.
  • the fiber splitter ports may also include identification of a fifth port.
  • the first optical fiber splitter is an optical fiber splitter adjacent to the first central office device
  • the fifth port is a port in the first optical fiber splitter connected to the first central office device.
  • the identification of the optical fiber splitter port through which the first optical signal sent by the first user equipment passes can also be The identification of the fifth port is included, so that the target central office device can learn information about the port through which the first optical signal is sent from the first central office device to the first user device.
  • the first optical fiber splitter may be connected to other central office equipment except the first central office equipment.
  • the first optical fiber splitter is an optical fiber splitter adjacent to the first central office device
  • the fifth port is a port in the first optical fiber splitter connected to the first central office device.
  • the first optical fiber splitter is not connected to other central office equipment except the first central office equipment.
  • the present application provides a topology restoration method, applied to a first optical network.
  • the first optical network may include at least one central office device and at least one user device, at least one central office device and at least one user device.
  • the optical fibers for device communication are connected through at least one optical fiber splitter.
  • the dispersion device is used to introduce additional dispersion values. , the dispersion values introduced by dispersion devices on different optical paths are different.
  • the topology restoration method includes: the first user terminal device determines that the dispersion value of the first optical signal received from the first central office device is the first dispersion value ⁇ 1.
  • the first user equipment sends a first dispersion difference value between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2 to the target central office equipment, and the first dispersion difference value is used to determine the topology structure of the first optical network.
  • the second dispersion value ⁇ 2 is the dispersion value when the first optical signal is transmitted from the first central office equipment to the first user equipment when no additional dispersion value is introduced on the first optical path.
  • the first user-end device belongs to at least one user-end device, and the first central office device belongs to at least one central office device.
  • the first optical path is an optical path between the first optical fiber splitter and the first user-end equipment, and the first optical fiber splitter is an optical fiber splitter adjacent to the first central office equipment.
  • the target central office device is the first central office device or at least one central office device other than the first central office device.
  • the first user equipment can obtain the first dispersion difference of the first optical signal when the additional dispersion value is introduced on the first optical path and when the additional dispersion value is not introduced.
  • the first dispersion difference is the value of the first optical signal passing through Introduced by the dispersion device on the optical path.
  • the first user equipment sends the first dispersion difference value to the target central office equipment, so that the target central office equipment can determine the topology structure of the first optical network based on the first dispersion difference value.
  • the first optical network can be a PON
  • the central office equipment can be an OLT
  • the user equipment can be an ONU.
  • this topology restoration method can be used to restore the topology structure of PON.
  • the first user-side device sends the first dispersion difference value to the target central office device, which may specifically include: the first user-side device sends the first dispersion difference value to the target central office device through the PLOAM channel.
  • a dispersion difference value, the first dispersion difference value is carried in the burst frame of the first user terminal device.
  • the situation where no additional dispersion value is introduced on the first optical path includes: the situation where no additional dispersion value is introduced on the first optical path, and the situation where no additional dispersion value is introduced on the second optical path.
  • the first optical fiber splitter is not connected to the central office equipment except the first central office equipment.
  • a dispersion device on the second optical path between the first central office equipment and the first optical fiber splitter there is also a dispersion device on the second optical path between the first central office equipment and the first optical fiber splitter.
  • the situation where no additional dispersion value is introduced on the first optical path includes: the situation where no additional dispersion value is introduced on the first optical path and the additional dispersion value is introduced on the second optical path.
  • the topology restoration method may further include: the first user-side device sending a second optical signal to the first central office device.
  • the first client device receives the first signal from the first central office device.
  • the fifth port is the port in the first optical fiber splitter connected to the first office equipment.
  • the dispersion value introduced by the dispersion device on the second optical path is the sixth dispersion value ⁇ 6.
  • the logo of the fifth port is the first office equipment.
  • the end device is determined based on the sixth dispersion value ⁇ 6.
  • the first client device sends the identifier of the fifth port to the target central office device.
  • a dispersion device on the second optical path between the first central office equipment and the first optical fiber splitter there is also a dispersion device on the second optical path between the first central office equipment and the first optical fiber splitter.
  • the situation where no additional dispersion value is introduced on the first optical path includes: the situation where no additional dispersion value is introduced on the first optical path, and the situation where no additional dispersion value is introduced on the second optical path.
  • the first optical fiber splitter can also be connected to other central office equipment except the first central office equipment.
  • ⁇ 2 first optical fiber dispersion coefficient ⁇ first length
  • the first optical fiber dispersion coefficient is the optical fiber of the optical fiber used for communication between the first central office device and the first user end device.
  • the first length of the dispersion coefficient is the length of the optical fiber through which the first optical signal is transmitted from the first central office equipment to the first user equipment.
  • the coefficient is the optical fiber dispersion coefficient of the optical fiber between the first central office equipment and the first user equipment
  • the first length is the length of the optical fiber through which the first optical signal is transmitted from the first central office equipment to the first user equipment.
  • the present application provides a topology restoration method, applied to a first optical network.
  • the first optical network may include at least one central office device and at least one user device, at least one central office device and at least one user device.
  • the optical fibers for device communication are connected through at least one optical fiber splitter.
  • the dispersion device is used to introduce additional dispersion values. , the dispersion values introduced by dispersion devices on different optical paths are different.
  • the topology restoration method includes: the target central office equipment can receive a first dispersion difference value from the first user equipment, where the first dispersion difference value is the difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2. Afterwards, the target central office equipment can determine the identification of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference value. Furthermore, the target central office equipment can determine the topology structure of the first optical network based on the identification of the optical fiber splitter port through which the first optical signal passes.
  • the first dispersion value ⁇ 1 is the dispersion value of the first optical signal from the first central office device received by the first user equipment;
  • the second dispersion value ⁇ 2 is the dispersion value without introducing additional dispersion value on the first optical path.
  • the first optical path is the optical path between the first optical fiber splitter and the first user equipment, and the first optical fiber splitter is An optical fiber splitter adjacent to the first central office device;
  • the first user-end device belongs to at least one user-end device,
  • the first central office device belongs to at least one central office device, and
  • the target central office device is the first central office device or at least Central office equipment in a central office equipment other than the first central office equipment.
  • the target central office equipment can determine the topology structure of the first optical network based on the first dispersion difference value from the first user equipment.
  • the first optical network can be a PON
  • the central office equipment can be an OLT
  • the user equipment can be an ONU.
  • this topology restoration method can be used to restore the topology structure of PON.
  • the target central office device receives the first dispersion difference value from the first user device, which may specifically include: the target central device receives the first dispersion difference value from the first user device through the PLOAM channel.
  • the first dispersion difference value is carried in the burst frame of the first user terminal device.
  • the target central office device determines the identification of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference value. Specifically, the target central office device queries the first optical fiber splitter port. A relationship table, the first relationship table includes a mapping relationship between dispersion values and identifiers of optical fiber splitter ports. And, the target central office equipment determines the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table as the optical fiber splitter through which the first optical signal passes. Identification of the bundler port.
  • the first optical fiber splitter is also an optical fiber splitter adjacent to the first user terminal equipment.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table may include the identification of the first port.
  • the first port is a port in the first optical fiber splitter connected to the first user equipment.
  • the optical fiber splitter between the first central office equipment and the first user equipment includes a first optical fiber splitter and a second optical fiber splitter, and the second optical fiber splitter
  • the beam splitter is a fiber optic beam splitter adjacent the first customer premises equipment.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table may include the identification of the second port and/or the identification of the third port, and the identification of the fourth port, where the second port is the A port in an optical fiber splitter connected to the second optical fiber splitter, a third port in the second optical fiber splitter connected to the first optical fiber splitter, and a fourth port in the second optical fiber splitter The port to connect to the first client device.
  • the dispersion value introduced by the dispersion device on the optical path between the first optical fiber splitter and the second optical fiber splitter is the fourth dispersion value ⁇ 4, and the dispersion value on the optical path between the second optical fiber splitter and the first user equipment
  • the situation where no additional dispersion value is introduced on the first optical path may include: the situation where no additional dispersion value is introduced on the first optical path, and the situation where no additional dispersion value is introduced on the second optical path.
  • the first optical fiber splitter is not connected to the central office equipment except the first central office equipment.
  • a dispersion device on the second optical path between the first central office equipment and the first optical fiber splitter there is also a dispersion device on the second optical path between the first central office equipment and the first optical fiber splitter.
  • the situation where no additional dispersion value is introduced on the first optical path includes: the situation where no additional dispersion value is introduced on the first optical path and the additional dispersion value is introduced on the second optical path.
  • the topology restoration method further includes: the identification of the fifth port through which the target central office device receives the second optical signal from the first user-end device.
  • the second optical signal is an optical signal sent by the first user-end device to the first central office device
  • the fifth port is a port in the first optical fiber splitter connected to the first central office device.
  • the first optical fiber splitter may also be an optical fiber splitter adjacent to the first user-end equipment, between the first central office equipment and the first optical fiber splitter. There are also dispersion devices on the second optical path between them.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes the identification of the fifth port and the identification of the first port.
  • the fifth port is a port in the first optical fiber splitter connected to the first central office device, and the first port is a port in the first optical fiber splitter connected to the first user end device.
  • the optical fiber splitter between the first central office equipment and the first user equipment may include a first optical fiber splitter and a second optical fiber splitter, and a second optical fiber splitter.
  • the optical fiber splitter may be an optical fiber splitter adjacent to the first user-end equipment, and a dispersion device also exists on the second optical path between the first central office equipment and the first optical fiber splitter.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes the identification of the fifth port, the identification of the second port and/or the identification of the third port, and the identification of the fourth port.
  • the fifth port is a port of the first optical fiber splitter connected to the first central office device
  • the second port is a port of the first optical fiber splitter connected to the second optical fiber splitter
  • the third port is a third port.
  • the port of the second optical fiber splitter connected to the first optical fiber splitter, the The four ports are ports in the second optical fiber splitter that are connected to the first user equipment.
  • the dispersion value introduced by the dispersion device on the second optical path is the sixth dispersion value ⁇ 6, and the dispersion value introduced by the dispersion device on the optical path between the first optical fiber beam splitter and the second optical fiber splitter is the fourth dispersion value ⁇ 4,
  • the dispersion value introduced by the dispersion device on the optical path between the second optical fiber splitter and the first user-end equipment is the fifth dispersion value ⁇ 5.
  • no additional dispersion is introduced on the first optical path.
  • Values may include: no additional dispersion value is introduced on the first optical path, and no additional dispersion value is introduced on the second optical path.
  • ⁇ 2 first optical fiber dispersion coefficient ⁇ first length
  • the first optical fiber dispersion coefficient is the optical fiber of the optical fiber used for communication between the first central office equipment and the first user equipment.
  • the first length of the dispersion coefficient is the length of the optical fiber through which the first optical signal is transmitted from the first central office equipment to the first user equipment.
  • the coefficient is the optical fiber dispersion coefficient of the optical fiber between the first central office equipment and the first user equipment
  • the first length is the length of the optical fiber through which the first optical signal is transmitted from the first central office equipment to the first user equipment.
  • a communication device is provided.
  • the communication device is a first client device, and may also be a module applied in the first client device, such as a chip or a chip system.
  • the communication device includes various modules for executing the topology restoration method in the first aspect or any implementation of the first aspect.
  • the first user-end device belongs to a first optical network.
  • the first optical network may include at least one central office device and at least one user-end device.
  • the optical fiber used by the at least one central office device to communicate with the at least one user-end device passes through at least one optical fiber branch. Beamer connection, there are dispersion devices on the optical path between different optical fiber beam splitters and on the optical path between the optical fiber beam splitter and the user equipment.
  • the dispersion device is used to introduce additional dispersion values.
  • the dispersion devices on different optical paths introduce The dispersion values are different.
  • the communication device includes a processing module and a transceiver module.
  • the processing module may be configured to determine the dispersion value of the first optical signal received from the first central office device as the first dispersion value ⁇ 1.
  • the processing module may also be configured to determine the identity of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2.
  • the transceiver module may be used to send to the target central office device the identification of the optical fiber splitter port through which the first optical signal passes.
  • the identification of the optical fiber splitter port through which the first optical signal passes is used to determine the topology structure of the first optical network.
  • the second dispersion value ⁇ 2 is the dispersion value when the first optical signal is transmitted from the first central office equipment to the first user equipment when no additional dispersion value is introduced on the first optical path.
  • the first optical path is an optical path between the first optical fiber splitter and the first user-end equipment, and the first optical fiber splitter is an optical fiber splitter adjacent to the first central office equipment.
  • the first user-end device sends the identification of the optical fiber splitter port through which the first optical signal passes to the target central office device.
  • the target central office device is the first central office device or at least one central office device other than the first central office device. central office equipment.
  • the processing module is used to determine the optical fiber splitter port through which the first optical signal passes.
  • the identification may specifically include: first, the processing module may be configured to query a first relationship table, where the first relationship table includes a mapping relationship between the dispersion value and the identification of the optical fiber splitter port. Furthermore, the processing module may be configured to determine the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table as the identification of the optical fiber splitter port through which the first optical signal passes.
  • the transceiver module can also be used to send the second optical signal to the first central office device.
  • the transceiver module may also be used to receive the identification of the fifth port through which the second optical signal from the first central office device passes.
  • the fifth port is a port in the first optical fiber splitter that is connected to the first central office device.
  • the transceiver module can also be used to send the identification of the fifth port to the target central office device.
  • the central office device can be an OLT and the user-end device can be an ONU.
  • the technical effect of the fifth aspect may be referred to the first aspect, and will not be described again here.
  • a communication device is provided.
  • the communication device is a target central office equipment, and may also be a module applied in the target central office equipment, such as a chip or a chip system.
  • the communication device includes various modules for executing the topology restoration method in the second aspect or any implementation of the second aspect.
  • the target central office device belongs to a first optical network.
  • the first optical network may include at least one central office device and at least one user device.
  • the optical fiber used by the at least one central office device to communicate with the at least one user device is split through at least one optical fiber.
  • the dispersion devices are used to introduce additional dispersion values. The dispersion introduced by the dispersion devices on different optical paths The values are different.
  • the communication device includes a processing module and a transceiver module.
  • the transceiver module may be configured to receive an identification of the optical fiber splitter port through which the first optical signal from the first user terminal device passes.
  • the first optical signal is an optical signal sent by a first central office device to a user-end device.
  • the first user-end device belongs to at least one user-end device.
  • the first central office device belongs to at least one central office device.
  • the target central office device It is the first central office device or a central office device other than the first central office device among at least one central office device.
  • the processing module may be configured to determine the topology of the first optical network based on the identification of the optical fiber splitter port through which the first optical signal passes.
  • the transceiver module may also be configured to receive the identifier of the fifth port from the first client device.
  • a processing module configured to determine the topology structure of the first optical network according to the identification of the optical fiber splitter port through which the first optical signal passes.
  • it may include: a processing module, configured to determine the topology structure of the first optical network according to the identification of the optical fiber splitter port through which the first optical signal passes.
  • the identifier and the identifier of the fifth port determine the topology structure of the first optical network.
  • the central office device can be an OLT and the user-side device can be an ONU.
  • a communication device is provided.
  • the communication device is a first client device, and may also be a module applied in the first client device, such as a chip or a chip system.
  • the communication device includes various modules for executing the topology restoration method in the third aspect or any implementation manner of the third aspect.
  • the first user-end device belongs to a first optical network.
  • the first optical network may include at least one central office device and at least one user-end device.
  • the optical fiber used by the at least one central office device to communicate with the at least one user-end device passes through at least one optical fiber branch. Beamer connection, there are dispersion devices on the optical path between different optical fiber beam splitters and on the optical path between the optical fiber beam splitter and the user equipment.
  • the dispersion device is used to introduce additional dispersion values.
  • the dispersion devices on different optical paths introduce The dispersion values are different.
  • the communication device includes a processing module and a transceiver module.
  • the processing module may be used to determine that the dispersion value of the first optical signal received from the first central office device is the first dispersion value ⁇ 1, wherein the first user device belongs to the at least one user device, so The first central office device belongs to the at least one central office device.
  • the transceiver module may be configured to send a first dispersion difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2 to the target central office device, where the first dispersion difference is used to determine the topology of the first optical network.
  • the second dispersion value ⁇ 2 is the dispersion value when the first optical signal is transmitted from the first central office equipment to the first user equipment without introducing additional dispersion value on the first optical path;
  • the first optical path is the first optical fiber
  • the target central office device is the first central office device or at least one central office device other than the first central office device.
  • the transceiver module can also be used for the first central office
  • the device sends a second optical signal.
  • the transceiver module may also be used to receive the identification of the fifth port through which the second optical signal from the first central office device passes.
  • the fifth port is a port in the first optical fiber splitter that is connected to the first central office device.
  • the transceiver module can also be used to send the identification of the fifth port to the target central office device.
  • the central office equipment can be an OLT and the user equipment can be an ONU.
  • a communication device is provided.
  • the communication device is a target central office equipment, and may also be a module applied in the target central office equipment, such as a chip or a chip system.
  • the communication device includes various modules for executing the topology restoration method in the fourth aspect or any implementation manner of the fourth aspect.
  • the target central office device belongs to a first optical network.
  • the first optical network may include at least one central office device and at least one user device.
  • the optical fiber used by the at least one central office device to communicate with the at least one user device is split through at least one optical fiber.
  • the dispersion devices are used to introduce additional dispersion values. The dispersion introduced by the dispersion devices on different optical paths The values are different.
  • the communication device includes a processing module and a transceiver module.
  • the transceiver module may be configured to receive a first dispersion difference value from the first user equipment, where the first dispersion difference value is the difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2.
  • the processing module may be configured to determine, based on the first dispersion difference value, the identification of the optical fiber splitter port through which the first optical signal passes.
  • the processing module may also be used to determine the topology of the first optical network based on the identification of the optical fiber splitter port through which the first optical signal passes.
  • the first dispersion value ⁇ 1 is the dispersion value of the first optical signal from the first central office equipment received by the first user equipment.
  • the second dispersion value ⁇ 2 is the dispersion value when the first optical signal is transmitted from the first central office equipment to the first user equipment when no additional dispersion value is introduced on the first optical path.
  • the first optical path is an optical path between the first optical fiber splitter and the first user-end equipment, and the first optical fiber splitter is an optical fiber splitter adjacent to the first central office equipment.
  • the first user-end device belongs to at least one user-end device
  • the first central office device belongs to at least one central office device
  • the target central office device is the first central office device or at least one central office device other than the first central office device.
  • Central office equipment is the dispersion value when the first optical signal is transmitted from the first central office equipment to the first user equipment when no additional dispersion value is introduced on the first optical path.
  • the first optical path is an optical path between the first optical fiber splitter and the first user-end equipment
  • the first optical fiber splitter is an optical fiber splitter adjacent to the first central office equipment.
  • the first user-end device belongs to
  • the processing module is used to determine the optical fiber splitter port through which the first optical signal passes.
  • the identification may specifically include: first, the processing module may be configured to query a first relationship table, where the first relationship table includes a mapping relationship between the dispersion value and the identification of the optical fiber splitter port. Furthermore, the processing module may be configured to determine the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table as the identification of the optical fiber splitter port through which the first optical signal passes.
  • the transceiver module may also be configured to receive the identifier of the fifth port from the first client device.
  • a processing module configured to determine the topology structure of the first optical network according to the identification of the optical fiber splitter port through which the first optical signal passes.
  • it may include: a processing module, configured to determine the topology structure of the first optical network according to the identification of the optical fiber splitter port through which the first optical signal passes.
  • the identifier and the identifier of the fifth port determine the topology structure of the first optical network.
  • the central office equipment can be an OLT and the user equipment can be an ONU.
  • a communication device including: a processor and a memory; the memory is used to store computer execution instructions; when the communication device is running, the processor executes the computer execution instructions stored in the memory, so that the The communication device performs the topology restoration method as described in any one of the first aspect, the second aspect, the third aspect, or the fourth aspect.
  • a communication device including: a processor; the processor is configured to be coupled to a memory, and after reading instructions in the memory, execute the above-mentioned first or second aspect or the third aspect according to the instructions.
  • the communication device further includes a memory; the memory is used to store computer instructions.
  • the communication device further includes a communication interface; the communication interface is used for the communication device to communicate with other devices.
  • the communication interface may be a transceiver, an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit, etc.
  • the communication device may be a chip or a chip system.
  • the communication device may be composed of a chip, or may include a chip and other discrete devices.
  • the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system. wait.
  • the above-mentioned processor may also be embodied as a processing circuit or a logic circuit.
  • a computer-readable storage medium is provided. Instructions are stored in the computer-readable storage medium.
  • the computer-readable storage medium When the computer-readable storage medium is run on a computer, the computer can execute the first aspect, the second aspect, or the third aspect. Or the topology restoration method described in any one of the fourth aspects.
  • a twelfth aspect provides a computer program product containing instructions that, when run on a computer, enable the computer to execute any one of the above first aspect, second aspect, third aspect or fourth aspect. topology restoration method.
  • Figure 1 is a schematic diagram of a PON provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram of the power change curve of an ONU provided by an embodiment of the present application.
  • Figure 3 is a schematic structural diagram of a first optical network provided by an embodiment of the present application.
  • Figure 4 is a schematic structural diagram of another first optical network provided by an embodiment of the present application.
  • Figure 5 is a flow chart of a topology restoration method provided by an embodiment of the present application.
  • Figure 6 is a flow chart for a target OLT to obtain the identity of the fifth port provided by an embodiment of the present application
  • Figure 7 is a flow chart of another topology restoration method provided by an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the central office equipment is the equipment close to the operator side, and the user equipment is the equipment close to the user side.
  • the central office equipment provides network access function and is used to connect the user equipment to the operator network.
  • OLT is a central office equipment
  • ONU is a user equipment.
  • P2P point-to-point
  • P2MP point-to-multipoint
  • a PON is a point-to-multipoint optical fiber transmission and access technology.
  • a PON can include an OLT and multiple ONUs.
  • the OLT is placed at the operator's central office, and the ONU is placed near the end user.
  • the OLT and ONU are connected through one or more optical fiber splitters in the ODN.
  • the devices in the PON are all passive devices, and the transmitted optical signal cannot reflect the information of the device through which the optical signal passes. Therefore, it is difficult to restore the topology of the PON based on the optical signal transmitted in the PON. Relying on manual arranging is very inefficient.
  • coherent communication technology can be introduced into PON for communication.
  • the optical signal transmitted based on coherent communication technology can contain rich channel information, so that port identification and topology restoration can be performed based on the channel characteristics of the optical signal.
  • the port through which the optical signal passes can be inferred based on the power information in the channel characteristics of the optical signal, and then the topology structure of the PON can be inferred.
  • the topology inference solution based on power monitoring uses real-time power monitoring and a probability model to infer the topology structure of the PON. This solution is usually used for topology inference in secondary optical splitting scenarios.
  • Figure 1 shows a schematic diagram of a PON.
  • OLT 101 can be connected to an optical fiber splitter 102a
  • the optical fiber splitter 102a can be connected to an optical fiber splitter 102b and an optical fiber splitter 102c respectively.
  • the optical fiber splitter 102b is connected to ONU-1 and ONU-4
  • the optical fiber splitter 102c is connected to ONU-2 and ONU-3.
  • the PON shown in Figure 1 includes a two-level light splitting structure, in which the optical fiber beam splitter 102a is a first-level light splitting structure, and the optical fiber beam splitter 102b and the optical fiber beam splitter 102c are two-level light splitting structures.
  • the power detection system on the OLT 101 side forms a power change curve by detecting and recording the power value of each ONU in real time, and infers the topology of the network system through different ONU power fluctuation events.
  • Figure 2 shows a schematic diagram of the power change curve of an ONU, as shown in Figure 2.
  • Figure 2 records the power change curve of the optical signal sent by the OLT 101 to each ONU in Figure 1 over time.
  • ONU-2 and ONU-3 have power fluctuations at the same time, and the power fluctuation trends are highly consistent. From this, it can be judged that ONU-2 and ONU-3 are located under the same optical fiber splitter. Furthermore, it can be naturally inferred that ONU-1 and ONU-4 are located under another optical fiber splitter.
  • the topology inference solution based on power monitoring can only infer which optical fiber splitter the ONU is hung under, but cannot infer which port of the optical fiber splitter the ONU is located on, and cannot restore the topology of the entire PON.
  • the power information monitored in this solution is easily affected by power fluctuations introduced by construction, which leads to a reduction in the accuracy of topology inference.
  • the first optical network may include at least one central office device and at least one user device.
  • the optical fibers used to communicate between the at least one central office device and the at least one user device are connected through at least one optical fiber splitter.
  • the optical fibers between different optical fiber splitters There are dispersion devices on the optical path and between the optical fiber beam splitter and the user equipment.
  • the dispersion devices are used to introduce additional dispersion values.
  • the dispersion values introduced by the dispersion devices on different optical paths are different.
  • the first user terminal device may determine that the dispersion value of the first optical signal received from the first central office device is the first dispersion value ⁇ 1.
  • the first user equipment may determine the identity of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2. Afterwards, the first user equipment can send the identification of the optical fiber splitter port through which the first optical signal passes to the target central office equipment. The identification of the optical fiber splitter port through which the first optical signal passes is used to determine the topology of the first optical network. structure.
  • the second dispersion value ⁇ 2 is the dispersion value when the first optical signal is transmitted from the first central office equipment to the first user equipment when no additional dispersion value is introduced on the first optical path.
  • the first user-end device belongs to at least one user-end device
  • the first central office device belongs to at least one central office device.
  • the first optical path is an optical path between the first optical fiber splitter and the first user-end equipment
  • the first optical fiber splitter is an optical fiber splitter adjacent to the first central office equipment.
  • the target central office device is the first central office device or at least one central office device other than the first central office device.
  • the first user equipment can determine whether or not the additional dispersion value is introduced on the first optical path. is the first dispersion difference value of the first optical signal, and the first dispersion difference value is introduced by the dispersion device on the optical path through which the first optical signal passes. Since the dispersion components on different optical paths introduce different values, the identity of the optical fiber splitter port through which the first optical signal passes can be determined based on the first dispersion difference value. Further, the target central office device can determine the first optical network topology based on the identification of the optical fiber splitter port through which the first optical signal passes determined by each first user device. Moreover, since the dispersion device that introduces the dispersion value is relatively cheap, the implementation cost of this solution is low.
  • the central office equipment may be an OLT
  • the user equipment may be an ONU.
  • the first optical network may be a PON. Based on this, this topology restoration method can be used to restore the topology structure of PON.
  • At least one of the following or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items).
  • at least one of a, b, or c can mean: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • words such as “first” and “second” are used to distinguish identical or similar items with basically the same functions and effects.
  • words such as “first” and “second” do not limit the number and execution order, and words such as “first” and “second” do not limit the number and execution order.
  • words such as “exemplary” or “for example” are used to represent examples, illustrations or explanations. Any embodiment or design described as “exemplary” or “such as” in the embodiments of the present application is not to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as “exemplary” or “such as” is intended to present related concepts in a concrete manner that is easier to understand.
  • the topology restoration method of the present application can be applied to a first optical network.
  • the first optical network may include at least one central office device and at least one user device.
  • the optical fiber used by the at least one central office device to communicate with the at least one user device passes through at least one Fiber splitter connection, there are dispersion devices on the optical path between different optical fiber splitters and between the optical fiber splitter and the user equipment.
  • the dispersion components are used to introduce additional dispersion values.
  • the dispersion components on different optical paths The introduced dispersion values are different.
  • the central office equipment is an OLT and the user equipment is an ONU.
  • the first central office device may be the first OLT
  • the second central office device may be the second OLT
  • the target central office device may be the target OLT
  • the first user device may be the first ONU.
  • the first side port of the optical fiber splitter refers to the port close to the OLT side of the optical fiber splitter
  • the second side port of the optical fiber splitter refers to the port close to the ONU side of the optical fiber splitter.
  • Figure 3 shows a schematic structural diagram of a first optical network provided by an embodiment of the present application.
  • the first optical network may include an OLT 301a, an optical fiber splitter 302a and an ONU 303a.
  • the OLT 301a and the optical fiber The port A 1 on the first side of the optical fiber splitter 302a is connected, and the ONU 303a is connected to the port B 1 on the second side of the optical fiber splitter 302a.
  • a dispersion device 304a may exist on the optical path between the optical fiber splitter 302a and the ONU 303a, and the dispersion device 304a may be used to introduce a dispersion value.
  • the ports on the second side of the optical fiber splitter may include multiple ports, and the multiple ports on the second side of the optical fiber splitter in the first optical network may be used to communicate with at least one ONU and/or at least one optical fiber splitter. bundler connection.
  • the optical fiber splitter 302a can also pass Port B 2 on its second side is connected to ONU 303b.
  • a dispersion device 304b may also exist on the optical path between the optical fiber splitter 302a and the ONU 303b.
  • the optical fiber splitter 302a can also be connected to the optical fiber splitter 302b through the port B 3 on the second side.
  • a dispersion device 304c may also exist on the optical path between the optical fiber splitter 302a and the optical fiber splitter 302b.
  • the optical fiber splitter 302b is connected to the optical fiber splitter 302a through the port C 1 on its first side.
  • the optical fiber splitter 302b may also be connected to at least one ONU and/or at least one optical fiber splitter.
  • the first optical network shown in Figure 3 takes the second side port of the optical fiber splitter 302b as an example to connect to the ONU.
  • the optical fiber splitter 302b can be connected to the ONU 303c through its second side port D1 . connect.
  • a dispersion device 304d may also exist on the optical path between the optical fiber splitter 302b and the ONU 303c.
  • the number of ONUs connected to the optical fiber splitter 302b may be multiple.
  • the optical fiber splitter 302b may also be connected to the ONU 303c through the port D2 on its second side.
  • a dispersion device 304e may also exist on the optical path between the optical fiber splitter 302b and the ONU 303d.
  • the optical fiber splitter can be a point-to-multipoint structure (the first side of the optical fiber splitter has one port, and the second side of the optical fiber splitter has multiple ports), or it can be a multi-point to multi-point structure. Multi-point structure (both the first side and the second side of the optical fiber splitter include multiple ports).
  • the optical fiber splitter adjacent to the OLT can have a multipoint-to-multipoint structure, and then the same optical fiber splitter can be connected to multiple OLTs.
  • the optical fiber splitter 302 can also be connected to the OLT 301b through the port A2 on the first side.
  • a dispersion device may also be present on the optical path between the OLT and the adjacent optical fiber splitter.
  • the dispersion device is used to introduce additional dispersion values.
  • the dispersion values introduced by the dispersion devices on different optical paths are different.
  • a dispersion device 304f may exist on the optical path between the OLT 301a and the optical fiber splitter 302
  • a dispersion device 304g may exist on the optical path between the OLT 301b and the optical fiber splitter 302.
  • the optical fiber splitter that is not adjacent to the OLT may also have a multipoint-to-multipoint structure.
  • FIG. 4 shows a schematic structural diagram of another first optical network provided by an embodiment of the present application.
  • the first optical network may include an OLT 401a, an OLT 401b, an optical fiber splitter 402a, an optical fiber splitter 402b, Fiber splitter 402c and ONU 403a.
  • the OLT 401a can be connected to the port E 1 on the first side of the optical fiber splitter 402a
  • the OLT 401b can be connected to the port F 1 on the first side of the optical fiber splitter 402b
  • the optical fiber splitter 402a can pass through it.
  • the port G 1 on the second side is connected to the port H 1 on the first side of the optical fiber splitter 402c.
  • the optical fiber splitter 402b can be connected to the port H 2 on the first side of the optical fiber splitter 402c through the port J 1 on the second side.
  • the optical fiber splitter 402c can be connected to the ONU 403a through the port K1 on its second side.
  • dispersion device 404a on the optical path between the optical fiber splitter 402a and the optical fiber splitter 402c
  • a dispersion device 404b on the optical path between the optical fiber splitter 402b and the optical fiber splitter 402c
  • the optical fiber splitter 402c and the optical fiber splitter 402c there is a dispersion device 404c on the optical path between ONUs 403a.
  • the optical fiber splitter 402a, the optical fiber splitter 402b and the optical fiber splitter 402c in Figure 4 can also be connected to other ONUs and/or optical fiber splitters.
  • the optical fiber splitter 402a, the optical fiber splitter 402b and the optical fiber splitter 402c are also connected to other ONUs.
  • the optical fiber splitter 402a can also pass through the port G on its second side. 2 is connected to the ONU 403b, the optical fiber splitter 402b can be connected to the ONU 403c through the port J 2 on its second side, and the optical fiber splitter 402c can be connected to the ONU 403d through the port K 2 on its second side.
  • a dispersion device 404d may exist on the optical path between the optical fiber splitter 402a and the ONU 403b
  • a dispersion device 404e may exist on the optical path between the optical fiber splitter 402b and the ONU 403c
  • a dispersion device 404e may exist on the optical path between the optical fiber splitter 402b and the ONU 403d.
  • the optical path between the OLT 401a and the optical fiber splitter 402a may There is a dispersion device 404g, and a dispersion device 404h may be present on the optical path between the OLT 401b and the optical fiber splitter 402a.
  • the dispersion values introduced by the dispersion devices on different optical paths are different, so the different dispersion values introduced by the different dispersion devices can be used to identify different optical paths.
  • the dispersion device can be a series of passive or active devices that can introduce specified dispersion values, such as dispersion optical fibers and dispersion gratings.
  • the dispersion device in the embodiment of the present application can be arranged near the optical fiber splitter port (for example, connected to the optical fiber splitter port), which is easy to implement.
  • the business scenarios or communication systems described in the embodiments of this application are for the purpose of more clearly explaining the technical solutions of the embodiments of this application and do not constitute a limitation on the technical solutions provided by the embodiments of this application.
  • the architecture and the number of devices of the communication system shown in FIG. 3 and FIG. 4 are only exemplary descriptions. Of course, there may be other numbers of devices in the communication system and other connection relationships. For example, the number of OLTs connected to the optical fiber splitter can be greater, the number of ONUs connected to the optical fiber splitter can be greater, the number of other optical fiber splitters connected to the optical fiber splitter can also be greater, and the number of optical fiber splitters can be greater, and the number of optical fiber splitters can be greater. There can be more levels of servers. Persons of ordinary skill in the art know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.
  • the topology restoration method provided by the embodiment of the present application will be described below with reference to the communication systems shown in Figures 3 and 4. Among them, the actions, terms, etc. involved in the various embodiments of this application can be referred to each other and are not limited.
  • the message name or parameter name in the message in the embodiment of this application is just an example, and other names can also be used in specific implementation without limitation.
  • the topology restoration method may include the following steps 501 to 504.
  • Step 501 The first ONU determines that the dispersion value of the first optical signal received from the first OLT is the first dispersion value ⁇ 1.
  • the first ONU belongs to at least one OLT included in the first optical network
  • the first ONU belongs to at least one ONU included in the first optical network
  • at least one optical fiber splitter may be included between the first OLT and the first ONU. device.
  • the dispersion devices are used to introduce additional dispersion values.
  • the dispersion values introduced by the dispersion devices on different optical paths are different.
  • the first OLT can be OLT 301a or OLT 301b, and the first ONU can be ONU 303a, ONU 303b, ONU 303c or ONU 303d.
  • the first OLT may be OLT 401a or OLT 401b, and the first ONU may be ONU 403a, ONU 403b, ONU 403c or ONU 403d.
  • the first optical signal sent from the first OLT can reach the first ONU through the optical fiber and the optical fiber splitter, and can also pass through the dispersion device on the optical path.
  • the first dispersion value ⁇ 1 is the accumulated dispersion value of the first optical signal when it reaches the first ONU.
  • the first dispersion value ⁇ 1 is equal to the dispersion value generated by the optical fiber during the transmission process of the first optical signal and the additional dispersion value introduced by the dispersion device on the optical path. The sum of dispersion values.
  • the first optical signal sent by OLT 301a to ONU 303a will pass through port A 1 of OLT 301a and optical fiber splitter 302a The optical path between them reaches the optical fiber splitter 302a, and then reaches the ONU 303a through the optical path between port B 1 of the optical fiber splitter 302a and the ONU 303a. During this period, the first optical signal will pass through the dispersion device 304a.
  • the first dispersion value ⁇ 1 is equal to the sum of the dispersion value generated by the first optical signal in the optical fiber between the OLT 301a and the ONU 303a and the additional dispersion value introduced by the dispersion device 304a.
  • the first optical signal will also pass through the dispersion device 304f.
  • the first dispersion value ⁇ 1 is equal to the dispersion value generated by the first optical signal in the optical fiber between the OLT 301a and the ONU 303a, the additional dispersion value introduced by the dispersion device 304f, and the additional dispersion value introduced by the dispersion device 304a.
  • the first optical signal sent by OLT 301a to ONU 303c will pass through port A of OLT 301a and optical fiber splitter 302a
  • the optical path between 1 reaches the optical fiber splitter 302a.
  • the first dispersion value ⁇ 1 is equal to the sum of the dispersion value generated by the first optical signal in the optical fiber between the OLT 301a and the ONU 303c, the additional dispersion value introduced by the dispersion device 304c, and the additional dispersion value introduced by the dispersion device 304d.
  • the first optical signal will also pass through the dispersion device 304f.
  • the first dispersion value ⁇ 1 is equal to the dispersion value generated by the first optical signal in the optical fiber between the OLT 301a and the ONU 303c, the additional dispersion value introduced by the dispersion device 304f, the additional dispersion value introduced by the dispersion device 304c, and The sum of the additional dispersion values introduced by the dispersion device 304d.
  • Step 502 The first ONU determines the identity of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2.
  • the second dispersion value ⁇ 2 is the dispersion value when the first optical signal is transmitted from the first OLT to the first ONU without introducing additional dispersion value on the first optical path.
  • the first optical path is an optical path between the first optical fiber splitter and the first ONU.
  • the first optical fiber splitter is an optical fiber splitter adjacent to the first OLT on the optical path from the first OLT to the first ONU.
  • the first dispersion difference is equal to ⁇ 1- ⁇ 2.
  • the first optical path is the optical path between the optical fiber splitter 302a and ONU 303a.
  • the first optical path is the optical path between the optical fiber splitter 302a and ONU 303b.
  • the first optical path includes the optical path between the optical fiber splitter 302a and the optical fiber splitter 302b, and the optical fiber splitter 302b and ONU 303c. light path between.
  • the first optical path includes the optical path between the optical fiber splitter 302a and the optical fiber splitter 302b, and the optical fiber splitter 302b and ONU 303d. light path between.
  • the first optical path includes the port G 1 of the fiber splitter 402a and the port H 1 of the fiber splitter 402c.
  • the first optical path includes the optical path between the port F 1 of the optical fiber splitter 402 b and the port H 2 of the optical fiber splitter 402 c, and the optical fiber splitter The optical path between port K1 of the switch 402c and the ONU 403c.
  • the situation where no additional dispersion value is introduced on the first optical path may include: the situation where no additional dispersion value is introduced on the first optical path, and the situation where no additional dispersion value is introduced on the second optical path.
  • the first dispersion difference value is equal to the additional dispersion value introduced by the dispersion device on the first optical path, and the first dispersion difference value is the additional dispersion value introduced on the optical path between the first OLT and the first ONU.
  • a dispersion device may exist on the second optical path between the first OLT and the first optical fiber splitter.
  • the situation where no additional dispersion value is introduced on the first optical path may include: the situation where no additional dispersion value is introduced on the first optical path, and the situation where no additional dispersion value is introduced on the second optical path.
  • the first dispersion difference value is equal to the sum of the additional dispersion value introduced by the dispersion device on the second optical path and the additional dispersion value introduced by the dispersion device on the first optical path.
  • the first dispersion difference value is the sum of the first OLT and the additional dispersion value introduced by the dispersion device on the first optical path.
  • the additional dispersion value introduced on the optical path between the first ONU is the sum of the second optical path between the first ONU.
  • the dispersion values introduced by the dispersion devices on different optical paths can be set to special values with a high degree of discrimination. Based on this, according to the different dispersion values introduced by the dispersion device, the location of the dispersion device can be determined. light path. Therefore, the first ONU can determine the additional dispersion value introduced on the optical path between the first OLT and the first ONU based on the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2, and further can determine the first optical signal from the first OLT. The optical path through which it is transmitted to the first ONU.
  • the optical path may be indicated by the identification of the fiber splitter ports. Therefore, the first ONU can determine the identification of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference value.
  • the optical paths between different optical fiber splitters can be indicated by the identification of the optical fiber splitter ports at one or both ends of the optical path.
  • the optical path between the optical fiber splitter 302a and the optical fiber splitter 302b may be indicated by the port B 3 of the optical fiber splitter 302a and/or the port C 1 of the optical fiber splitter 302b.
  • the optical path between the optical fiber splitter 402a and the optical fiber splitter 402c can be indicated by the port G 1 of the optical fiber splitter 402a and/or the port H 1 of the optical fiber splitter 302c.
  • the optical fiber splitter The optical path between fiber optic splitter 402b and fiber optic splitter 402c may be indicated by port J1 of fiber optic splitter 402b and/or port H2 of fiber optic splitter 302c.
  • the optical path between the optical fiber splitter and the ONU may be indicated by the identification of the optical fiber splitter port of the optical path.
  • the optical path between the optical fiber splitter 302a and the ONU 303a can be indicated by the port B 1 of the optical fiber splitter 302a
  • the optical path between the optical fiber splitter 302a and the ONU 303b can be indicated by the optical fiber splitter 302a.
  • the optical path between the optical fiber splitter 302b and the ONU 303c can be indicated by the port B 2 of the optical fiber splitter 302a.
  • the optical path between the optical fiber splitter 302b and the ONU 303d can be indicated by the optical fiber splitter 302b .
  • the optical path between the optical fiber splitter 402a and the ONU 403b can be indicated by the port G 2 of the optical fiber splitter 402a, and the optical path between the optical fiber splitter 402b and the ONU 403c can be indicated by the optical fiber splitter 402a.
  • Port J 2 of 402b is indicated.
  • the optical path between the optical fiber splitter 402c and the ONU 403a can be indicated by the port K 1 of the optical fiber splitter 402c.
  • the optical path between the optical fiber splitter 402c and the ONU 403d can be indicated by the optical fiber splitter. is indicated by port K2 of bundler 402c.
  • Step 503 The first ONU sends the identification of the optical fiber splitter port through which the first optical signal passes to the target OLT.
  • the target OLT is an OLT used for topology restoration in the first optical network.
  • the target OLT is specified in advance.
  • the target OLT is the first OLT or the target OLT is an OLT other than the first OLT.
  • the number of OLTs in the first optical network is 1, then the first OLT is the target OLT.
  • the target OLT may be OLT 301a or OLT 301b.
  • the target OLT may be OLT 401a or OLT 401b.
  • the first ONU may send the first dispersion difference value to the target OLT through a physical layer operations, administration and maintenance (PLOAM) channel, and the first dispersion difference value may be carried in the burst of the first ONU.
  • PLOAM physical layer operations, administration and maintenance
  • Step 504 The target OLT determines the topology structure of the first optical network based on the identification of the optical fiber splitter port through which the first optical signal passes.
  • the target OLT may receive the identification of the optical fiber splitter port through which the first optical signal from each ONU in the first optical network passes. Furthermore, the identification of the optical fiber splitter port of the first optical signal destined for the first ONU determined by the first ONU is equivalent to determining the topology structure of the first ONU. Therefore, after receiving the identification of the optical fiber splitter port sent by each ONU, the target OLT can restore the topology structure of the entire first optical network.
  • this application provides a topology restoration method, which is applied in the first optical network.
  • dispersion devices may exist on the optical path between different optical fiber splitters, and on the optical path between the optical fiber splitter and the ONU, and the dispersion values introduced by the dispersion devices on different optical paths are different.
  • the first ONU can determine the identity of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2.
  • first The ONU also sends the determined identification of the optical fiber splitter port to the target OLT, so that the target OLT can determine the topology structure of the entire first optical network.
  • the dispersion value is introduced by adding a dispersion device on the optical path to achieve the purpose of topological restoration.
  • the dispersion device is relatively cheap, and the implementation cost of this solution is low.
  • the first ONU can determine the path through which the first optical signal passes by querying the first relationship table.
  • Identification of the fiber splitter port The first relationship table may include a mapping relationship between the dispersion value and the identification of the optical fiber splitter port, and the first OLT may use the first dispersion difference value to match the dispersion value in the first relationship table to find the corresponding optical fiber splitter.
  • the identifier of the server port The first ONU may determine the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table as the identification of the optical fiber splitter port through which the first optical signal passes.
  • the connection relationship between the first optical fiber splitter and the first OLT is obvious, and its topology can be known.
  • the first optical fiber splitter may also be an optical fiber splitter adjacent to the first ONU, and the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table may be An identifier of a port, where the first port is a port in the first optical fiber splitter connected to the first ONU.
  • the first OLT is OLT 301a or OLT 301b
  • the first ONU is ONU 303a
  • the first optical fiber splitter may be the optical fiber splitter 302a
  • the first port may be the port B 1 of the optical fiber splitter 302a
  • the additional dispersion value introduced by the dispersion device 304a is ⁇ 3.
  • the first relationship table may include entries as shown in Table 1. Referring to Table 1, the identifier of the optical fiber splitter port corresponding to the first dispersion difference ⁇ 3 in the first relationship table is B 1 .
  • the first OLT is OLT 301a or OLT 301b
  • the first ONU is ONU 303b
  • the first optical fiber splitter may be the optical fiber splitter 302a
  • the first port may be the port B 2 of the optical fiber splitter 302a
  • the additional dispersion value introduced by the dispersion device 304b is ⁇ 3.
  • the first relationship table may include entries as shown in Table 2. Referring to Table 2, the identifier of the optical fiber splitter port corresponding to the first dispersion difference ⁇ 3 in the first relationship table is B 2 .
  • the first OLT is OLT 401a
  • the first ONU is ONU 403b
  • the first optical fiber splitter may be the optical fiber splitter 402a
  • the first port may be the port G 2 of the optical fiber splitter 402a
  • the additional dispersion value introduced by the dispersion device 404d is ⁇ 3.
  • the first relationship table may include entries as shown in Table 3. Referring to Table 3, the identifier of the optical fiber splitter port corresponding to the first dispersion difference ⁇ 3 in the first relationship table is G 2 .
  • the first OLT is OLT 401b
  • the first ONU is ONU 403c
  • the first optical fiber splitter may be the optical fiber splitter 402b
  • the first port may be the port J 2 of the optical fiber splitter 402b
  • the additional dispersion value introduced by the dispersion device 404e is ⁇ 3.
  • the first relationship table may include entries as shown in Table 4. Referring to Table 4, the identifier of the optical fiber splitter port corresponding to the first dispersion difference ⁇ 3 in the first relationship table is J 2 .
  • a second optical fiber splitter may be further included between the first optical fiber splitter and the first ONU, and the second optical fiber splitter may be an optical fiber splitter adjacent to the first ONU.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table may include an identification of the second port, an identification of the third port, and an identification of the fourth port.
  • the second port is a port of the first optical fiber splitter connected to the second optical fiber splitter
  • the third port is a port of the second optical fiber splitter connected to the first optical fiber splitter
  • the fourth port is The port in the second optical fiber splitter connected to the first ONU.
  • the dispersion value introduced by the dispersion device on the optical path between the first optical fiber splitter and the second optical fiber splitter is the fourth dispersion value ⁇ 4, and the dispersion device on the optical path between the second optical fiber splitter and the first ONU
  • the first OLT is OLT 301a or OLT 301b
  • the first ONU is ONU 303c
  • the first optical fiber splitter can be the optical fiber splitter 302a
  • the second optical fiber splitter can be the optical fiber splitter 302b
  • the second port can be the port B 3 of the optical fiber splitter 302a
  • the third port can be the optical fiber splitter 302a.
  • Port C 1 of the beam splitter 302b, and the fourth port is the port D 1 of the optical fiber splitter 302b.
  • the additional dispersion value introduced by the dispersion device 304c is ⁇ 4, and the dispersion value introduced by the dispersion device 304d is the fifth dispersion value ⁇ 5.
  • the first relationship table may include entries as shown in Table 5. Referring to Table 5, the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes B 3 and/or C 1 , and D 1 .
  • the first OLT is OLT 301a or OLT 301b
  • the first ONU is ONU 303d
  • the first optical fiber splitter can be the optical fiber splitter 302a
  • the second optical fiber splitter can be the optical fiber splitter 302b
  • the second port can be the port B 3 of the optical fiber splitter 302a
  • the third port can be the optical fiber splitter 302a.
  • Port C 1 of the beam splitter 302b, and the fourth port is the port D 2 of the optical fiber splitter 302b.
  • the additional dispersion value introduced by the dispersion device 304c is ⁇ 4, and the dispersion value introduced by the dispersion device 304e is the fifth dispersion value ⁇ 5.
  • the first relationship table may include entries as shown in Table 6. Referring to Table 6, the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes B 3 and/or C 1 , and D 2 .
  • the first OLT is OLT 401a
  • the first ONU is ONU 403a
  • the first optical fiber splitter can be the optical fiber splitter 402a
  • the second optical fiber splitter can be the optical fiber splitter 402c
  • the second port can be the port G 1 of the optical fiber splitter 402a
  • the third port can be the optical fiber splitter 402a.
  • Port H 1 of the beam splitter 402c, and the fourth port is the port K 1 of the optical fiber splitter 402c.
  • the additional dispersion value introduced by the dispersion device 404a is ⁇ 4, and the dispersion value introduced by the dispersion device 404c is the fifth dispersion value ⁇ 5.
  • the first relationship table may include entries as shown in Table 7. Referring to Table 7, the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes G 1 and/or H 1 , and K 1 .
  • the first OLT is OLT 401b
  • the first ONU is ONU 403a
  • the first optical fiber splitter can be the optical fiber splitter 402b
  • the second optical fiber splitter can be the optical fiber splitter 402c
  • the second port can be the port J 1 of the optical fiber splitter 402b
  • the third port can be the optical fiber splitter 402b.
  • the fourth port is the port K 1 of the optical fiber splitter 402c.
  • the additional dispersion value introduced by the dispersion device 404b is ⁇ 4, and the dispersion value introduced by the dispersion device 404c is the fifth dispersion value ⁇ 5.
  • the first relationship table may include entries as shown in Table 8. Referring to Table 8, the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes J 1 and/or H 2 , and K 1 .
  • the topology of the first optical fiber splitter and the first OLT is unknown.
  • the port to which the first OLT is connected in the first optical fiber splitter is unknown, and thus the topology is unknown.
  • a dispersion device may exist between the first OLT and the first optical fiber splitter, and the first relationship table may include the identification of the optical fiber splitter port in the first optical fiber splitter that is connected to the first OLT.
  • a dispersion device exists on the second optical path between the first OLT and the first optical fiber splitter.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table may include the identification of the fifth port and the first optical fiber splitter.
  • the fifth port is a port of the first optical fiber splitter connected to the first OLT
  • the first port is a port of the first optical fiber splitter connected to the first ONU.
  • the first OLT is OLT 301a
  • the first ONU is ONU 303a.
  • the first optical fiber splitter can be the optical fiber splitter 302a
  • the first port can be the port B 1 of the optical fiber splitter 302a
  • the fifth port can be the port A 1 of the optical fiber splitter 302a
  • the dispersion device 304a is introduced
  • the additional dispersion value of is ⁇ 3, and the additional dispersion value introduced by the dispersion device 304f is ⁇ 6.
  • the first relationship table may include entries as shown in Table 9. Referring to Table 9, the identification of the optical fiber splitter port corresponding to the first dispersion difference value ( ⁇ 3+ ⁇ 6) in the first relationship table is A. 1 and B 1 .
  • the first OLT is OLT 301b
  • the first ONU is ONU 303b.
  • the first optical fiber splitter can be the optical fiber splitter 302a
  • the first port can be the port B 2 of the optical fiber splitter 302a
  • the fifth port can be the port A 2 of the optical fiber splitter 302b
  • the dispersion device 304b is introduced
  • the additional dispersion value of is ⁇ 3, and the additional dispersion value introduced by the dispersion device 304g is ⁇ 6.
  • the first relationship table may include entries as shown in Table 10. Referring to Table 10, the identification of the optical fiber splitter port corresponding to the first dispersion difference ( ⁇ 3+ ⁇ 6) in the first relationship table is A. 2 and B 2 .
  • the first OLT is OLT 401a
  • the first ONU is ONU 403b.
  • the first optical fiber splitter can be the optical fiber splitter 402a
  • the first port can be the port G 2 of the optical fiber splitter 402a
  • the fifth port can be the port E 1 of the optical fiber splitter 402a
  • the dispersion device 404d is introduced
  • the additional dispersion value of is ⁇ 3, and the additional dispersion value introduced by the dispersion device 404g is ⁇ 6.
  • the first relationship table may include entries as shown in Table 11. Referring to Table 11, the identifier of the optical fiber splitter port corresponding to the first dispersion difference ( ⁇ 3+ ⁇ 6) in the first relationship table is G. 2 and E 1 .
  • the first OLT is OLT 401b
  • the first ONU is ONU 403c.
  • the first fiber splitter can be the fiber splitter 402a
  • the first port can be the port J2 of the fiber splitter 402b
  • the fifth port can be the port F1 of the fiber splitter 402a
  • the dispersion device 404e is introduced
  • the additional dispersion value of is ⁇ 3, and the additional dispersion value introduced by the dispersion device 404h is ⁇ 6.
  • the first relationship table may include entries as shown in Table 12. Referring to Table 12, the identifier of the optical fiber splitter port corresponding to the first dispersion difference ( ⁇ 3+ ⁇ 6) in the first relationship table is F. 1 and J 2 .
  • a dispersion device exists on the second optical path between the first OLT and the first optical fiber splitter. If a second optical fiber splitter is also included between the first optical fiber splitter and the first ONU, and the second optical fiber splitter is an optical fiber splitter adjacent to the first ONU, the first relationship table is related to the first optical fiber splitter.
  • the identification of the optical fiber splitter port corresponding to the dispersion difference value may include the identification of the fifth port, the identification of the second port and/or the identification of the third port, and the identification of the fourth port.
  • the fifth port is the port of the first optical fiber splitter connected to the first OLT
  • the second port is the port of the first optical fiber splitter connected to the second optical fiber splitter
  • the third port is the second optical fiber
  • the port in the beam splitter is connected to the first optical fiber splitter
  • the fourth port is the port in the second optical fiber splitter connected to the first ONU.
  • the dispersion value introduced by the dispersion device on the second optical path is the sixth dispersion value ⁇ 6, and the dispersion value introduced by the dispersion device on the optical path between the first optical fiber beam splitter and the second optical fiber splitter is the fourth dispersion value ⁇ 4,
  • the first OLT is OLT 301a
  • the first ONU is ONU 303c.
  • the first optical fiber splitter can be the optical fiber splitter 302a
  • the second optical fiber splitter can be the optical fiber splitter 302b
  • the fifth port can be the port A 1 of the optical fiber splitter 302a
  • the second port can be The port B 3 of the optical fiber splitter 302a
  • the third port is the port C 1 of the optical fiber splitter 302b
  • the fourth port is the port D 1 of the optical fiber splitter 302b.
  • the additional dispersion value introduced by the dispersion device 304c is ⁇ 4, the dispersion value introduced by the dispersion device 304d is the fifth dispersion value ⁇ 5, and the additional dispersion value introduced by the dispersion device 304f is ⁇ 6.
  • the first relationship table may include entries as shown in Table 13. Referring to Table 13, the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes A1, B3 and / Or C 1 , and D 1 .
  • the first OLT is OLT 301b
  • the second optical fiber splitter can be the optical fiber splitter 302b
  • the fifth port can be the port A 2 of the optical fiber splitter 302a
  • the second port can be The port B 3 of the optical fiber splitter 302a
  • the third port is the port C 1 of the optical fiber splitter 302b
  • the fourth port is the port D 2 of the optical fiber splitter 302b.
  • the additional dispersion value introduced by the dispersion device 304c is ⁇ 4
  • the dispersion value introduced by the dispersion device 304e is the fifth dispersion value ⁇ 5
  • the additional dispersion value introduced by the dispersion device 304g is ⁇ 6.
  • the first relationship table may include entries as shown in Table 14. Referring to Table 14, the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes A 2 , B 3 and /or C 1 , and D 2 .
  • the first OLT is OLT 401a
  • the second optical fiber splitter can be the optical fiber splitter 402c
  • the fifth port can be the port E 1 of the optical fiber splitter 402a
  • the second port can be The port G 1 of the optical fiber splitter 402a
  • the third port is the port H 1 of the optical fiber splitter 402c
  • the fourth port is the port K 1 of the optical fiber splitter 402c.
  • the additional dispersion value introduced by the dispersion device 404a is ⁇ 4, the dispersion value introduced by the dispersion device 404c is the fifth dispersion value ⁇ 5, and the additional dispersion value introduced by the dispersion device 404g is ⁇ 6.
  • the first relationship table may include entries as shown in Table 15. Referring to Table 15, the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes E 1 , G 1 and /or H 1 , and K 1 .
  • the first OLT is OLT 401b
  • the second optical fiber splitter can be the optical fiber splitter 402c
  • the fifth port can be the port F 1 of the optical fiber splitter 402b
  • the second port can be The port J 1 of the optical fiber splitter 402b
  • the third port is the port H 2 of the optical fiber splitter 402c
  • the fourth port is the port K 2 of the optical fiber splitter 402c.
  • the additional dispersion value introduced by the dispersion device 404b is ⁇ 4, the dispersion value introduced by the dispersion device 404f is the fifth dispersion value ⁇ 5, and the additional dispersion value introduced by the dispersion device 404h is ⁇ 6.
  • the first relationship table may include entries as shown in Table 16. Referring to Table 16, the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table includes F 1 , J 1 and /or H 2 , and K 2 .
  • the identification of the optical fiber splitter port through which the first optical signal passes can indicate the optical path through which the first optical signal passes, and thus can be used to determine the topology between the first OLT and the first ONU.
  • dispersion values introduced by the dispersion device are illustrative and do not constitute a limitation of the present application. In the embodiment of the present application, the dispersion values introduced by different dispersion devices are different.
  • ⁇ 2 first optical fiber dispersion coefficient ⁇ first length
  • first optical fiber dispersion coefficient is the optical fiber dispersion coefficient of the optical fiber between the first OLT and the first ONU
  • the first length is the length of the optical fiber through which the first optical signal is transmitted from the first OLT to the first ONU. That is to say, ⁇ 2 is the accumulated dispersion value generated by the optical fiber transmission of the first optical signal between the first OLT and the first ONU.
  • the first optical fiber dispersion coefficient may be preconfigured in the first ONU, or may be obtained after the first ONU is registered in the first OLT.
  • the first length may be obtained by the first ONU through a ranging method in optical communication.
  • the first optical fiber splitter does not communicate with other optical components except the first OLT. OLT connection.
  • the dispersion value introduced by the dispersion device on the second optical path is the sixth dispersion value ⁇ 6,
  • the dispersion value introduced by the dispersion device on the optical path between the first optical fiber beam splitter and the first ONU is the third dispersion value ⁇ 3.
  • a second optical fiber splitter is further included between the first optical fiber splitter and the first ONU, and the second optical fiber splitter is an optical fiber splitter adjacent to the first ONU.
  • the dispersion value introduced by the dispersion device on the optical path between the first optical fiber splitter and the second optical fiber splitter is the fourth dispersion value ⁇ 4, and the dispersion value on the optical path between the second optical fiber splitter and the first ONU is The dispersion value introduced by the dispersion device is the fifth dispersion value ⁇ 5.
  • the identification of the optical fiber splitter port through which the first optical signal passes determined by the first ONU based on the first dispersion difference value does not need to be Includes identification of the fifth port.
  • the identification of the optical fiber splitter port corresponding to the first dispersion difference value stored in the first relationship table may not include the identification of the fifth port.
  • the first OLT is OLT 301a or OLT 301b
  • the first optical fiber splitter is the optical fiber splitter 302a
  • the first ONU is the ONU 303a
  • the first relationship table may include entries as shown in Table 1 above.
  • the first OLT is OLT 301a or OLT 301b
  • the first optical fiber splitter is optical fiber splitter 302a
  • the first ONU is ONU 303b
  • dispersion device 304f There is a dispersion device 304g between the OLT 301b and the optical fiber splitter 302a.
  • the first relationship table may include entries as shown in Table 2 above.
  • the optical fiber branch through which the first optical signal is determined by the first node in step 502 is The identifier of the beam splitter port does not include the identifier of the fifth port.
  • the identifier of the optical fiber splitter port through which the first optical signal sent by the first node to the target OLT passes does not include the identifier of the fifth port. In this case, the target OLT also needs to obtain the identity of the fifth port.
  • Figure 6 shows a flow chart for the target OLT to obtain the identity of the fifth port.
  • the method for the target OLT to obtain the identity of the fifth port can be as follows: Step 601 to Step 604 shown.
  • Step 601 The first OLT determines that the dispersion value of the second optical signal received from the first ONU is the seventh dispersion value ⁇ 7.
  • Step 602 The first OLT determines the identity of the optical fiber splitter port through which the second optical signal passes based on the second dispersion difference between the seventh dispersion value ⁇ 7 and the eighth dispersion value ⁇ 8.
  • the eighth dispersion value ⁇ 8 is the dispersion value when the second optical signal is sent from the first ONU to the first OLT when no additional dispersion value is introduced between the first OLT and the first ONU.
  • ⁇ 8 first length ⁇ first optical fiber dispersion coefficient.
  • the second dispersion difference value ⁇ 7- ⁇ 8, and the second dispersion difference value is the sum of additional dispersion values introduced on the optical path between the first OLT and the first ONU.
  • the first OLT may query the second relationship table to determine the identity of the optical fiber splitter port through which the second optical signal passes.
  • the identity of the optical fiber splitter port in the second relationship table may include the fifth The identification of the port.
  • the second relationship table may include a mapping relationship between the dispersion value and the identification of the optical fiber splitter port.
  • the first OLT may use the second dispersion difference value to match the dispersion value in the second relationship table to find the corresponding optical fiber splitter.
  • the identifier of the server port may be used to use the second dispersion difference value to match the dispersion value in the second relationship table to find the corresponding optical fiber splitter.
  • Step 603 The first OLT sends the identification of the fifth port through which the second optical signal passes to the first ONU.
  • Step 604 The first ONU sends the identifier of the fifth port to the target OLT.
  • the first ONU can obtain the identifier of the fifth port, and can send the identifier of the fifth port to the target OLT, so that the target OLT can restore the topology structure of the entire first optical network.
  • the first optical fiber splitter may also be connected to the second OLT, and a dispersion device may also be present on the third optical path between the second OLT and the first optical fiber splitter.
  • the first ONU can also receive the third optical signal from the second OLT.
  • the behavior of the first ONU in receiving the third optical signal from the second OLT is the same as the behavior of the first ONU in receiving the first optical signal from the first OLT. Please refer to the above description and will not be used here. Again.
  • the above steps 501 to 504 are explained by taking the first ONU to determine the identification of the optical fiber splitter port through which the first optical signal passes as an example.
  • the identification of the optical fiber splitter port through which the first optical signal passes can also be implemented by the first OLT.
  • the flow chart of a topology restoration method provided by this embodiment of the present application can be shown in Figure 7 .
  • the topology restoration method may include the following steps 701 to 704.
  • Step 701 The first ONU determines that the dispersion value of the first optical signal received from the first OLT is the first dispersion value ⁇ 1.
  • step 701 reference may be made to the description of step 501, which will not be described again here.
  • Step 702 The first ONU sends the first dispersion difference value between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2 to the target OLT.
  • the first ONU sends the first dispersion difference value to the target OLT through the PLOAM channel, and the first dispersion difference value may be carried in the burst frame of the first ONU.
  • Step 703 The target OLT determines the identity of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2.
  • the way in which the target OLT determines the identification of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference value is the same as the above method in which the first ONU determines the identification of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference value.
  • the identification method is the same. You can refer to the relevant description above and will not be repeated here.
  • the target OLT may also determine the identification of the optical fiber splitter port through which the first optical signal passes based on the first relationship table.
  • Step 704 The target OLT determines the topology structure of the first optical network based on the identification of the optical fiber splitter port through which the first optical signal passes.
  • the target OLT can determine the topology structure from the first OLT to the first ONU according to the identification of the optical fiber splitter port through which the first optical signal passes. Since the first ONU can refer to any ONU in the first optical network, and the first OLT can refer to any OLT, the target OLT can restore the entire first optical network after receiving the first difference sent by each ONU. topology.
  • the methods and/or steps implemented by the first ONU can also be implemented by components (such as chips or circuits) available for the first communication node
  • the methods and/or steps implemented by the target OLT can also be implemented by components (such as chips or circuits) that can be used for the first communication node. or steps, may also be implemented by components (such as chips or circuits) that can be used in the target OLT.
  • the embodiment of the present application also provides a communication device, which is used to implement the above various methods.
  • the communication device may be the first ONU in the above method embodiment, or a device including the above first ONU, or a component usable for the first ONU.
  • the communication device may also be the target OLT in the above method embodiment, or a device including the above target OLT, or a component that can be used in the target OLT.
  • the communication device includes corresponding hardware structures and/or software modules for performing each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.
  • Embodiments of the present application can divide the communication device into functional modules according to the above method embodiments.
  • each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.
  • FIG 8 shows a schematic structural diagram of a communication device.
  • the communication device 80 includes a processing module 801 and a transceiver module 802.
  • the transceiver module 802 may also be called a transceiver unit to implement transceiver functions, and may be, for example, a transceiver circuit, a transceiver, a transceiver or a communication interface.
  • the processing module 801 may be used to determine the dispersion value of the first optical signal received from the first OLT as the first dispersion value ⁇ 1.
  • the processing module 801 may also be configured to determine the identity of the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2.
  • the transceiver module 802 may be configured to send to the target OLT the identification of the optical fiber splitter port through which the first optical signal passes.
  • the identification of the optical fiber splitter port through which the first optical signal passes is used to determine the topology structure of the first optical network.
  • the second dispersion value ⁇ 2 is the dispersion value when the first optical signal is transmitted from the first OLT to the first ONU without introducing additional dispersion value on the first optical path.
  • the first optical path is an optical path between the first optical fiber splitter and the first ONU, and the first optical fiber splitter is an optical fiber splitter adjacent to the first OLT.
  • the first ONU sends the identification of the optical fiber splitter port through which the first optical signal passes to the target OLT, and the target OLT is the first OLT or an OLT other than the first OLT in at least one OLT.
  • the processing module 801 is configured to determine the optical fiber splitter port through which the first optical signal passes based on the first dispersion difference value.
  • the identification may specifically include: First, the processing module 801 may be configured to query a first relationship table, which includes a mapping relationship between the dispersion value and the identification of the fiber splitter port. Furthermore, the processing module 801 may be configured to determine the identification of the optical fiber splitter port corresponding to the first dispersion difference value in the first relationship table as the identification of the optical fiber splitter port through which the first optical signal passes.
  • the transceiver module 802 can also be used to send the second optical signal to the first OLT.
  • the transceiver module 802 may also be configured to receive an identification of a fifth port through which the second optical signal from the first OLT passes.
  • the fifth port is a port in the first optical fiber splitter connected to the first OLT.
  • the transceiver module 802 may also be used to send the identification of the fifth port to the target OLT.
  • the processing module 801 may also be used to determine that the dispersion value of the first optical signal received from the first OLT is the first dispersion value ⁇ 1, wherein the first ONU belongs to the at least one ONU, so The first OLT belongs to the at least one OLT.
  • the transceiver module 802 may also be configured to send a first dispersion difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2 to the target OLT, where the first dispersion difference is used to determine the topology of the first optical network.
  • the second dispersion value ⁇ 2 is the dispersion value when the first optical signal is transmitted from the first OLT to the first ONU without introducing additional dispersion value on the first optical path;
  • the first optical path is the first optical fiber beam splitter and
  • the first optical fiber splitter is an optical fiber splitter adjacent to the first OLT.
  • the target OLT is the first OLT or an OLT other than the first OLT among at least one OLT.
  • the transceiver module 802 may be configured to receive the identification of the optical fiber splitter port through which the first optical signal from the first ONU passes.
  • the first optical signal is an optical signal sent by the first OLT to an ONU
  • the first ONU belongs to at least one ONU
  • the first OLT belongs to at least one OLT
  • the target OLT is the first OLT or is the first OLT among at least one OLT.
  • the processing module 801 may be configured to determine the topology of the first optical network based on the identification of the optical fiber splitter port through which the first optical signal passes.
  • the transceiver module 802 may also be used to receive the identity of the fifth port from the first ONU.
  • the processing module 801 is used to determine the topology structure of the first optical network according to the identification of the optical fiber splitter port through which the first optical signal passes. Specifically, it may include: the processing module 801 is used to split the optical fiber according to the optical fiber splitter port through which the first optical signal passes.
  • the identifier of the switch port and the identifier of the fifth port are used to determine the topology structure of the first optical network.
  • the transceiver module 802 may also be configured to receive a first dispersion difference value from the first ONU, where the first dispersion difference value is the difference between the first dispersion value ⁇ 1 and the second dispersion value ⁇ 2.
  • the processing module 801 may also be configured to determine, based on the first dispersion difference value, the identification of the optical fiber splitter port through which the first optical signal passes.
  • the processing module 801 may also be configured to determine the topology of the first optical network based on the identification of the optical fiber splitter port through which the first optical signal passes.
  • the first dispersion value ⁇ 1 is the dispersion value of the first optical signal received by the first ONU from the first OLT.
  • the second dispersion value ⁇ 2 is the dispersion value when the first optical signal is transmitted from the first OLT to the first ONU without introducing additional dispersion value on the first optical path.
  • the first optical path is an optical path between the first optical fiber splitter and the first ONU, and the first optical fiber splitter is an optical fiber splitter adjacent to the first OLT.
  • the first ONU belongs to at least one ONU, the first OLT belongs to at least one OLT, and the target OLT is the first OLT or an OLT other than the first OLT in the at least one OLT.
  • the communication device and its respective units may also be software modules, and the software module is called by the processor to implement the above topology restoration method.
  • the processor may be a central processing unit (CPU), an application-specific integrated circuit (ASIC) implementation, or a programmable logic device (PLD).
  • the PLD may be a complex Programmable logic device (complex programmable logical device, CPLD), field programmable gate array (field programmable gate array, FPGA), general array logic (generic array logic, GAL) or any combination thereof.
  • the hardware may be implemented by a processor or a chip.
  • the chip includes interface circuit and control circuit.
  • the interface circuit is used to receive data from other devices other than the processor and transmit it to the control circuit, or to send data from the control circuit to other devices other than the processor.
  • control circuit and the interface circuit are used to implement any of the possible implementation methods in the above embodiments through logic circuits or executing code instructions.
  • the beneficial effects can be found in the description of any aspect in the above embodiments and will not be described again here.
  • processor in the embodiments of the present application may be a CPU, a neural processing unit (NPU) or a graphics processing unit (GPU), or other general-purpose processors, digital signal Processor (digital signal processor, DSP), ASIC, FPGA or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • a general-purpose processor can be a microprocessor or any conventional processor.
  • the communication device 80 shown in Figure 8 can also be implemented by the communication device 90, as shown in Figure 9.
  • Figure 9 is a schematic structural diagram of another communication device provided by this application.
  • the communication device 90 includes: a memory 910 and at least one processor 920, which can implement the online method provided by the above embodiment, and the memory 910 is used to store software instructions corresponding to the above online method.
  • the communication device 90 may refer to a chip or a chip system encapsulating one or more processors 920 .
  • the communication device 90 may further include a communication interface 930, which may be used to send and receive data.
  • the communication interface 930 may be implemented through an interface circuit included in the communication device 90 .
  • the communication interface 930, the processor 920 and the memory 910 can be connected through a bus 940, which can be divided into an address bus, a data bus, a control bus, etc.
  • the communication device 90 can also perform the functions of the communication device 80 shown in FIG. 8 , which will not be described again here.
  • the communication device 90 provided in this embodiment may be any of the aforementioned devices, such as the first ONU or the target OLT.
  • the method steps in the embodiments of the present application can also be implemented by a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory (random access memory, RAM), flash memory, read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM) , PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM or other well-known in the art any other form of storage media.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage media may be located in an ASIC.
  • the ASIC can be located in network equipment or terminal equipment.
  • the processor and the storage medium can also exist as discrete components in network equipment or terminal equipment.
  • the computer program product includes one or more computer programs or instructions.
  • the computer can be a general-purpose computer, a special-purpose computer, Computer networks, network equipment, user equipment, or other programmable devices.
  • the computer program or instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another.
  • the computer program or instructions may be transmitted from a website, computer, A server or data center transmits via wired or wireless means to another website site, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media.
  • the available media may be magnetic media, such as floppy disks, hard disks, and magnetic tapes; they may also be optical media, such as digital video discs (DVDs); they may also be semiconductor media, such as solid state drives (solid state drives). ,SSD).
  • “at least one” refers to one or more, and “plurality” refers to two or more.
  • “And/or” describes the association of associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects before and after are an “or” relationship; in the formula of this application, the character “/” indicates that the related objects before and after are a kind of "division” Relationship.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un procédé de restauration de topologie, un premier réseau optique et un appareil de communication, se rapportant au domaine technique des communications optiques. Dans le premier réseau optique, un équipement de bureau est connecté à un équipement de locaux d'abonné au moyen d'au moins un diviseur de faisceau lumineux, des dispositifs de dispersion peuvent être disposés sur un trajet optique entre différents diviseurs de faisceau lumineux, et un trajet optique entre les diviseurs de faisceau lumineux et l'équipement de locaux d'abonné, et des valeurs de dispersion introduites par différents dispositifs de dispersion sont différents. Par conséquent, l'équipement de locaux d'abonné peut déterminer, selon une valeur de dispersion supplémentaire réfléchie par un signal optique réceptionné, l'identifiant d'un port de diviseur de faisceau de fibre optique à travers lequel passe le signal optique. Tout équipement de locaux d'abonné peut transmettre, à un équipement de bureau cible, l'identifiant déterminé du port de diviseur de faisceau de fibre optique à travers lequel passe le signal optique vers l'équipement de locaux d'abonné, de sorte que l'équipement de bureau cible puisse restaurer la structure topologique du premier réseau optique selon les informations acquises.
PCT/CN2023/104731 2022-07-21 2023-06-30 Procédé de restauration de topologie, premier réseau optique et appareil de communication WO2024017022A1 (fr)

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Citations (5)

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EP2887566A1 (fr) * 2013-12-23 2015-06-24 Telefonica S.A. Système de distribution optique, dispositif portatif d'épissage, kit de pièces pour système de distribution optique et procédé pour la construction et la gestion dudit système
CN108696383A (zh) * 2017-04-05 2018-10-23 中兴通讯股份有限公司 无源光网络拓扑构建的方法、装置、距离扩展盒和光线路终端
CN111836134A (zh) * 2019-04-17 2020-10-27 华为技术有限公司 网络拓扑信息的获取方法、装置、设备及存储介质
WO2021098341A1 (fr) * 2019-11-19 2021-05-27 华为技术有限公司 Procédé et appareil d'identification de ports, système, et séparateur
CN114128305A (zh) * 2019-08-26 2022-03-01 华为技术有限公司 确定光网络终端连接的方法、设备及系统

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Publication number Priority date Publication date Assignee Title
EP2887566A1 (fr) * 2013-12-23 2015-06-24 Telefonica S.A. Système de distribution optique, dispositif portatif d'épissage, kit de pièces pour système de distribution optique et procédé pour la construction et la gestion dudit système
CN108696383A (zh) * 2017-04-05 2018-10-23 中兴通讯股份有限公司 无源光网络拓扑构建的方法、装置、距离扩展盒和光线路终端
CN111836134A (zh) * 2019-04-17 2020-10-27 华为技术有限公司 网络拓扑信息的获取方法、装置、设备及存储介质
CN114128305A (zh) * 2019-08-26 2022-03-01 华为技术有限公司 确定光网络终端连接的方法、设备及系统
WO2021098341A1 (fr) * 2019-11-19 2021-05-27 华为技术有限公司 Procédé et appareil d'identification de ports, système, et séparateur

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