WO2024022029A1 - 单纤双向通信方法、通信装置及系统 - Google Patents

单纤双向通信方法、通信装置及系统 Download PDF

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Publication number
WO2024022029A1
WO2024022029A1 PCT/CN2023/104768 CN2023104768W WO2024022029A1 WO 2024022029 A1 WO2024022029 A1 WO 2024022029A1 CN 2023104768 W CN2023104768 W CN 2023104768W WO 2024022029 A1 WO2024022029 A1 WO 2024022029A1
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node
optical signal
indication information
nodes
optical
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PCT/CN2023/104768
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English (en)
French (fr)
Inventor
陈曦
张阔
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华为技术有限公司
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Publication of WO2024022029A1 publication Critical patent/WO2024022029A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25Arrangements specific to fibre transmission
    • H04B10/2589Bidirectional transmission
    • H04B10/25891Transmission components
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25Arrangements specific to fibre transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50Transmitters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50Transmitters
    • H04B10/501Structural aspects
    • H04B10/503Laser transmitters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60Receivers
    • H04B10/61Coherent receivers

Definitions

  • the present application relates to the field of optical communication technology, and in particular, to a single-fiber two-way communication method, communication device and system.
  • optical fiber communication systems Two-way communications, and both parties to the communication can send and receive at the same time.
  • two-way communication can be implemented based on single fiber or dual fiber. If two-way communication is implemented based on dual fibers, then the sending and receiving signals of the two-way communication can be carried on different optical fibers. If two-way communication is implemented based on a single fiber, then the sending and receiving signals of the two-way communication can be carried on different wavelengths of one optical fiber.
  • single-fiber two-way communication can use only one optical fiber to complete the work that can only be completed by two optical fibers, which can save optical fiber resources.
  • the optical modules on both sides of the communication need to send and receive signals of different wavelengths. Therefore, two lasers with different wavelengths need to be used, which increases the size and cost of the optical module.
  • This application provides a single-fiber two-way communication method, communication device and system to solve the problem that in a single-fiber two-way communication system, different lasers need to be used to send and receive signals of different wavelengths, resulting in an inability to reduce the size and cost of optical modules.
  • this application provides a single-fiber two-way communication method.
  • the single-fiber two-way communication method can be applied to a first node.
  • the first node includes a first optical module.
  • the first optical module may include a first laser.
  • the first laser is connected to the first laser modulator and the first coherent receiver respectively through the first connection unit, and the first coherent receiver and the first laser modulator are connected to the same optical fiber through the second connection unit.
  • the single-fiber two-way communication method may include: the first node sending a first optical signal to the second node through a first laser modulator, where the first optical signal is obtained by modulating the laser light emitted by the first laser.
  • the first node receives the second optical signal from the second node through the first coherent receiver, and the first laser is used to generate the local oscillator light required by the first coherent receiver.
  • the center frequency of the first optical signal is f 1
  • the center frequency of the second optical signal is f 2
  • f 1 is different from f 2
  • is less than the first threshold.
  • only one laser is used for both the first node and the second node. This solution can effectively reduce the cost of optical communication and reduce the size of the optical module.
  • the frequency range of the first optical signal and the frequency range of the second optical signal do not overlap or partially overlap.
  • w 1 is the maximum frequency bandwidth of the first optical signal
  • w 2 is the maximum frequency bandwidth of the second optical signal
  • w 1 is the maximum frequency bandwidth of the first optical signal
  • w 2 is the maximum frequency bandwidth of the second optical signal
  • the frequency range of the first coherent receiver to receive the second optical signal is (f 3 - ⁇ x) to f 3 and f 3 to (f 3 + ⁇ x)
  • w 2 is the maximum frequency bandwidth of the second signal.
  • the single-fiber bidirectional communication method may further include: the first node may send the first parameter for adjusting the first optical signal to the second node. Then, the first node may receive first indication information from the second node, where the first indication information is used to instruct the second node to agree to adjust the first optical signal according to the first parameter. Afterwards, the first node may send second indication information to the second node, where the second indication information is used to instruct the first node to start adjusting the first optical signal. Furthermore, the first node adjusts the maximum frequency bandwidth of the first optical signal to w′ 1 , and/or adjusts the center frequency of the first optical signal to f′ 1 . Further, the first node may send third indication information to the second node, where the third indication information is used to indicate that the first node has completed the adjustment of the first optical signal.
  • the first parameter includes w′ 1 and/or f′ 1 , or ⁇ w 1 and/or f′ 1 .
  • ⁇ w 1 w′ 1 -w 1 .
  • the single-fiber bidirectional communication method may also include: first, the first node may send a second parameter for adjusting the second optical signal to the second node. Then, the first node receives fourth indication information from the second node, and the fourth indication information is used to instruct the second node to agree to adjust the second optical signal according to the second parameter. Afterwards, the first node may send fifth indication information to the second node, where the fifth indication information is used to instruct the second node to start adjusting the second optical signal. Further, the first node may receive sixth indication information from the second node, and the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the first parameter includes w′ 2 and/or f′ 2 , or ⁇ w 2 and/or f′ 2 .
  • ⁇ w 2 w' 2 -w 2 .
  • the single-fiber two-way communication method may also include: first, the first node sends a third optical signal to the second node for adjusting the first optical signal and the second optical signal. Three parameters. Afterwards, the first node receives seventh indication information from the second node, and the seventh indication information is used to instruct the second node to agree to adjust the first optical signal and the second optical signal according to the third parameter. The first node sends second indication information to the second node, and the second indication information is used to instruct the first node to start adjusting the first optical signal. The first node adjusts the maximum frequency bandwidth of the first optical signal to w′ 1 and/or adjusts the center frequency of the first optical signal to f′ 1 .
  • the first node sends third indication information to the second node, and the third indication information is used to instruct the first node to complete the adjustment of the first optical signal.
  • the first node sends fifth indication information to the second node, and the fifth indication information is used to instruct the second node to start adjusting the second optical signal.
  • the first node receives sixth indication information from the second node, and the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the single-fiber two-way communication method may also include: the first node sending a third parameter for adjusting the first optical signal and the second optical signal to the second node .
  • the first node receives seventh indication information from the second node, and the seventh indication information is used to instruct the second node to agree to adjust the first optical signal and the second optical signal according to the third parameter.
  • the first node sends fifth indication information to the second node, and the fifth indication information is used to indicate The second node begins to adjust the second optical signal.
  • the first node receives sixth indication information from the second node, and the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the first node sends second indication information to the second node, and the second indication information is used to instruct the first node to start adjusting the first optical signal.
  • the first node adjusts the maximum frequency bandwidth of the first optical signal to w′ 1 and/or adjusts the center frequency of the first optical signal to f′ 1 .
  • the first node sends third indication information to the second node, and the third indication information is used to instruct the first node to complete the adjustment of the first optical signal.
  • the third parameter includes at least one of f′ 1 , w′ 1 or ⁇ w 1 , and at least one of f′ 2 , w′ 2 or ⁇ w 2 .
  • ⁇ w 1 w′ 1 -w 1
  • ⁇ w 2 w′ 2 -w 2 .
  • the first node communicates with n nodes through the first optical module, n ⁇ 2.
  • f 1 f Ak
  • f 2 f Bk
  • f Ak is the message sent by the first node to the k-th node among n nodes.
  • the center frequency of the optical signal A k , f Bk is the center frequency of the optical signal B k sent by the k-th node to the first node, and k is a positive integer from 1 to n.
  • the single-fiber two-way communication method may also include: the first node sending a fourth node for adjusting the optical signal A k to the k-th node among the n nodes. parameter.
  • the first node receives the eighth indication information from the k-th node among the n nodes, and the eighth indication information is used to instruct the k-th node among the n nodes to agree to adjust the optical signal Ak according to the fourth parameter.
  • the first node sends ninth indication information to the k-th node among the n nodes.
  • the ninth indication information is used to instruct the first node to start adjusting the optical signal Ak .
  • the first node adjusts the maximum frequency band width of the optical signal Ak to w′ Ak , and/or adjusts the center frequency of the optical signal Ak to f′ Ak .
  • the first node sends the tenth indication information to the k-th node among the n nodes.
  • the tenth indication information is used to instruct the first node to complete the adjustment of the optical signal Ak .
  • the single-fiber two-way communication method may also include: the first node sending a fifth node for adjusting the optical signal B k to the k-th node among the n nodes. parameter.
  • the first node receives the eleventh indication information from the k-th node among the n nodes.
  • the eleventh indication information is used to instruct the k-th node among the n nodes to agree to adjust the optical signal B k according to the fifth parameter. .
  • the first node sends the twelfth instruction information to the k-th node among the n nodes, and the twelfth instruction information is used to instruct the k-th node among the n nodes to start adjusting the optical signal B k .
  • the first node receives the thirteenth indication information from the k-th node among the n nodes, and the thirteenth indication information is used to instruct the k-th node among the n nodes to complete the adjustment of the optical signal B k .
  • the single-fiber two-way communication method may also include: the first node sends to the k-th node among the n nodes for processing the optical signal A k and the optical signal B k Adjust the sixth parameter.
  • the first node receives the fourteenth indication information from the k-th node among the n nodes.
  • the fourteenth indication information is used to instruct the k-th node among the n nodes to agree to adjust the optical signal A k and the optical signal according to the sixth parameter.
  • B k to adjust The first node sends the ninth instruction information to the k-th node among the n nodes.
  • the ninth instruction information is used to instruct the first node to start processing the optical signal Ak . Adjustment.
  • the first node adjusts the maximum frequency band width of the optical signal Ak to w′ Ak , and/or adjusts the center frequency of the optical signal Ak to f′ Ak .
  • the first node sends the tenth indication information to the k-th node among the n nodes.
  • the tenth indication information is used to instruct the first node to complete the adjustment of the optical signal Ak .
  • the first node sends the twelfth instruction information to the k-th node among the n nodes, and the twelfth instruction information is used to instruct the k-th node among the n nodes to start adjusting the optical signal B k .
  • the first node receives the thirteenth indication information from the k-th node among the n nodes, and the thirteenth indication information is used to instruct the k-th node among the n nodes to complete the adjustment of the optical signal B k .
  • the single-fiber two-way communication method may also include: the first node sends to the k-th node among the n nodes for processing the optical signal A k and the optical signal B k Adjust the sixth parameter.
  • the first node receives the fourteenth indication information from the k-th node among the n nodes.
  • the fourteenth indication information is used to instruct the k-th node among the n nodes to agree to adjust the optical signal A k and the optical signal according to the sixth parameter.
  • B k to adjust the first node sends to the k-th node among the n nodes for processing the optical signal A k and the optical signal B k Adjust the sixth parameter.
  • the first node sends the twelfth instruction information to the k-th node among the n nodes, and the twelfth instruction information is used to instruct the k-th node among the n nodes to start adjusting the optical signal B k .
  • the first node receives the thirteenth indication information from the k-th node among the n nodes, and the thirteenth indication information is used to instruct the k-th node among the n nodes to complete the adjustment of the optical signal B k .
  • the first node sends ninth indication information to the k-th node among the n nodes. The ninth indication information is used to instruct the first node to start adjusting the optical signal Ak .
  • the first node adjusts the maximum frequency band width of the optical signal Ak to w′ Ak , and/or adjusts the center frequency of the optical signal Ak to f′ Ak .
  • the first node sends the tenth indication information to the k-th node among the n nodes.
  • the tenth indication information is used to instruct the first node to complete the adjustment of the optical signal Ak .
  • the sixth parameter includes at least one of f′ Ak , w′ Ak or ⁇ w Ak , and at least one of f′ Bk , w′ Bk or ⁇ w Bk .
  • ⁇ w Ak w′ Ak ⁇ w Ak
  • ⁇ w Bk w′ Bk ⁇ w Bk .
  • the single-fiber two-way communication method may also include: the first node sends the The node x among the nodes sends a seventh parameter for adjusting the optical signal A x and/or the optical signal B x .
  • the seventh parameter includes the adjusted center frequency f′ Ax of the optical signal A and/or the The center frequency f′ Bx of the optical signal Bx .
  • the first node receives the fifteenth indication information from the node x among the n nodes.
  • the fifteenth indication information is used to indicate that the node x among the n nodes agrees to process the optical signal A x to adjust.
  • x is a positive integer from 1 to n, and x is not equal to k.
  • the single-fiber two-way communication method may also include: the first node sends the The node x among the n nodes sends a seventh parameter for adjusting the optical signal A x and/or the optical signal B x .
  • the seventh parameter includes the adjusted center frequency f′ Ax of the optical signal A and/or the adjusted The center frequency f′ Bx of the optical signal Bx .
  • the first node receives the fifteenth indication information from the node x among the n nodes.
  • the fifteenth indication information is used to indicate that the node x among the n nodes agrees to process the optical signal A x to adjust.
  • x is a positive integer from 1 to n, and x is not equal to k.
  • this application provides a single-fiber two-way communication method.
  • the single-fiber two-way communication method can be applied to a second node.
  • the second node can include a second optical module.
  • the second optical module includes a second laser.
  • the second laser is connected to the second laser modulator and the second coherent receiver respectively through the third connection unit, and the second coherent receiver and the second laser modulator are connected to the same optical fiber through the fourth connection unit.
  • the single-fiber two-way communication method may include: the second node sends a second optical signal to the first node through the first laser modulator, where the second optical signal is obtained by modulating the laser light emitted by the second laser.
  • Second node pass The first optical signal from the first node is received through the second coherent receiver, and the second laser is used to generate local oscillator light required by the second coherent receiver.
  • the center frequency of the first optical signal is f 1
  • the center frequency of the second optical signal is f 2
  • f 1 is different from f 2
  • is less than the first threshold.
  • w 1 is the maximum frequency bandwidth of the first optical signal
  • w 2 is the maximum frequency bandwidth of the second optical signal
  • the frequency range of the first coherent receiver to receive the second optical signal is (f 4 - ⁇ y) to f 4 and f 4 to (f 4 + ⁇ y)
  • w 1 is the maximum frequency bandwidth of the first signal.
  • the single-fiber bidirectional communication method may further include: the second node receiving the first parameter from the first node for adjusting the first optical signal. Then, the second node may send first indication information to the first node, where the first indication information is used to instruct the second node to agree to adjust the first optical signal according to the first parameter. Afterwards, the second node may receive second indication information from the first node, and the second indication information is used to instruct the first node to start adjusting the first optical signal. In addition, the second node may receive third indication information from the first node, and the third indication information is used to indicate that the first node has completed the adjustment of the first optical signal.
  • the first parameter includes w′ 1 and/or f′ 1 , or ⁇ w 1 and/or f′ 1 .
  • ⁇ w 1 w′ 1 -w 1 .
  • the single-fiber bidirectional communication method may also include: first, the second node may receive a second parameter from the first node for adjusting the second optical signal. Then, the second node may send fourth indication information to the first node, where the fourth indication information is used to instruct the second node to agree to adjust the second optical signal according to the second parameter. Afterwards, the second node may receive fifth indication information from the first node, where the fifth indication information is used to instruct the second node to start adjusting the second optical signal. Furthermore, the second node can adjust the maximum frequency bandwidth of the second optical signal to w′ 2 , and/or adjust the center frequency of the second optical signal to f′ 2 . Finally, the second node may send sixth indication information to the second node, and the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the first parameter includes w′ 2 and/or f′ 2 , or ⁇ w 2 and/or f′ 2 .
  • ⁇ w 2 w' 2 -w 2 .
  • the single-fiber two-way communication method may also include: first, the second node may receive a signal from the first node for processing the first optical signal and the second optical signal. Adjust the third parameter. Then, the second node may send seventh indication information to the first node, where the seventh indication information is used to instruct the second node to agree to adjust the first optical signal and the second optical signal according to the third parameter. Afterwards, the second node may receive second indication information sent from the first node, and the second indication information is used to instruct the first node to start adjusting the first optical signal.
  • the second node may receive third indication information from the first node, where the third indication information is used to instruct the first node to complete the adjustment of the first optical signal. Further, the first node may send fifth indication information to the second node, where the fifth indication information is used to instruct the second node to start adjusting the second optical signal. Furthermore, the second node may adjust the maximum frequency bandwidth of the second optical signal to w′ 2 , and/or adjust the center frequency of the second optical signal to f′ 2 . Finally, the second node may send sixth indication information to the first node, and the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the single-fiber two-way communication method may also include: first, the second node may receive a signal from the first node for processing the first optical signal and the second optical signal. Adjust the third parameter. Then, the second node may send seventh indication information to the first node, where the seventh indication information is used to instruct the second node to agree to adjust the first optical signal and the second optical signal according to the third parameter. Afterwards, the second node may also receive fifth indication information from the first node, where the fifth indication information is used to instruct the second node to start adjusting the second optical signal.
  • the second node may adjust the maximum frequency bandwidth of the second optical signal to w′ 2 , and/or adjust the center frequency of the second optical signal to f′ 2 .
  • the second node may send sixth indication information to the first node, and the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the second node may receive second indication information sent from the first node, and the second indication information is used to instruct the first node to start adjusting the first optical signal.
  • the second node may receive third indication information from the first node, where the third indication information is used to instruct the first node to complete the adjustment of the first optical signal.
  • the third parameter includes at least one of f′ 1 , w′ 1 or ⁇ w 1 , and at least one of f′ 2 , w′ 2 or ⁇ w 2 .
  • ⁇ w 1 w′ 1 -w 1
  • ⁇ w 2 w′ 2 -w 2 .
  • the first node communicates with n nodes through the first optical module, n ⁇ 2.
  • f 1 f Ak
  • f 2 f Bk
  • f Ak is the message sent by the first node to the k-th node among n nodes.
  • the center frequency of the optical signal A k , f Bk is the center frequency of the optical signal B k sent by the k-th node to the first node.
  • a first node may include a first optical module.
  • the first optical module may include a first laser, a first connection unit, a first coherent receiver, a first laser modulator, and a first optical module.
  • Second connection unit wherein, the first laser is connected to the first laser modulator and the first coherent receiver respectively through the first connection unit, and the first coherent receiver and the first laser modulator are connected to the same optical fiber through the second connection unit.
  • a second node may include a second optical module.
  • the second optical module may include a second laser, a third connection unit, a second coherent receiver, a second laser modulator, and The fourth connection unit.
  • the second laser is connected to the second laser modulator and the second coherent receiver respectively through the third connection unit, and the second coherent receiver and the second laser modulator are connected to the same optical fiber through the fourth connection unit.
  • a fifth aspect provides a communication system, which includes a first node executing the single-fiber two-way communication method described in the first aspect, and a second node executing the single-fiber two-way communication method described in the second aspect. .
  • a sixth aspect provides a communication device, which may include a processor and a first optical module.
  • the processor may control the first optical module to perform the method described in any implementation manner of the first aspect.
  • the processor can be coupled to a memory, the memory can store computer instructions, and the processor can control the first optical module to execute the following after reading the computer instructions stored in the memory: The method described in any implementation manner of the above first aspect.
  • the memory may also store data to be sent by the first optical module and/or data received by the first optical module.
  • the communication device may further include a communication interface, and the communication interface may be used for digital communication between the communication device and other communication devices.
  • the communication interface can be implemented through an interface circuit.
  • a seventh aspect provides a communication device, which may include a processor and a second optical module.
  • the processor may control the second optical module to perform the method described in any implementation manner of the second aspect.
  • the processor can be coupled to a memory, and computer instructions can be stored in the memory. After reading the computer instructions stored in the memory, the processor can control the second optical module to execute the following: The method described in any implementation manner of the second aspect above.
  • the memory may also store data to be sent by the second optical module and/or data received by the second optical module.
  • the communication device may further include a communication interface, and the communication interface may be used for digital communication between the communication device and other communication devices.
  • the communication interface can be implemented through an interface circuit.
  • a computer-readable storage medium is provided. Instructions are stored in the computer-readable storage medium. When the computer-readable storage medium is run on a computer, the computer can execute any of the above aspects or any implementation method of the second aspect. method described.
  • the technical effects brought by any one of the design methods in the third to eighth aspects can be referred to the technical effects brought by different design methods in the first aspect or the second aspect, and will not be described again here.
  • Figure 1 is a schematic diagram of a point-to-point communication system based on dual-fiber bidirectional communication provided by an embodiment of the present application;
  • Figure 2 is a schematic diagram of a point-to-multipoint communication system based on dual-fiber bidirectional communication provided by an embodiment of the present application;
  • Figure 3 is a schematic diagram of a point-to-point communication system based on single-fiber two-way communication provided by an embodiment of the present application;
  • Figure 4 is a schematic diagram of a point-to-multipoint communication system based on single-fiber bidirectional communication provided by an embodiment of the present application;
  • Figure 5 is a schematic structural diagram of an optical module provided by an embodiment of the present application.
  • Figure 6 is a flow chart of a single-fiber two-way communication method provided by an embodiment of the present application.
  • Figure 7 is a schematic diagram of a first optical signal and a second optical signal provided by an embodiment of the present application.
  • Figure 8 is a schematic diagram of another first optical signal and a second optical signal provided by an embodiment of the present application.
  • Figure 9 is a flow chart of another single-fiber two-way communication method provided by an embodiment of the present application.
  • Figure 10 is a flow chart of another single-fiber two-way communication method provided by an embodiment of the present application.
  • Figure 11 is a flow chart of another single-fiber two-way communication method provided by an embodiment of the present application.
  • Figure 12 is a flow chart of yet another single-fiber two-way communication method provided by an embodiment of the present application.
  • Figure 13 is a schematic diagram of expanding the first optical signal according to an embodiment of the present application.
  • Figure 14 is another schematic diagram of expanding the first optical signal according to an embodiment of the present application.
  • Figure 15 is another schematic diagram of expanding the first optical signal according to the embodiment of the present application.
  • Figure 16 is a schematic diagram of an optical signal transmitted between a first node and n nodes according to an embodiment of the present application
  • Figure 17 is a schematic diagram of another optical signal transmitted between a first node and n nodes according to an embodiment of the present application.
  • Figure 18 is a schematic diagram of another optical signal transmitted between a first node and n nodes according to an embodiment of the present application.
  • Figure 19 is a schematic diagram of another optical signal transmitted between a first node and n nodes according to an embodiment of the present application.
  • Figure 20 is a flow chart of yet another single-fiber two-way communication method provided by an embodiment of the present application.
  • Figure 21 is a flow chart of yet another single-fiber two-way communication method provided by an embodiment of the present application.
  • Figure 22 is a flow chart of yet another single-fiber two-way communication method provided by an embodiment of the present application.
  • Figure 23 is a flow chart of yet another single-fiber two-way communication method provided by an embodiment of the present application.
  • Figure 24 is a schematic diagram of expanding the optical signal Ak provided by an embodiment of the present application.
  • Figure 25 is another schematic diagram of expanding the optical signal Ak provided by the embodiment of the present application.
  • Figure 26 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 27 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • full-duplex communication The communication method in which both communicating parties can send and receive at the same time
  • half-duplex communication the communication method in which both parties cannot send and receive at the same time.
  • full-duplex communications also often called two-way communications. Since the transmission medium in the optical fiber communication system is optical fiber, the transmission of optical signals in the optical fiber will be interfered by the reflection effect. Therefore, the sending and receiving signals in two-way communication are usually carried in different optical fibers or use different wavelengths in the same optical fiber.
  • the transceiver signals transmitted between the communication parties are carried in different optical fibers, which can be called dual-fiber two-way communication.
  • dual-fiber two-way communication the wavelengths of the receiving signal and the sending signal can be the same or different, without restrictions.
  • Figure 1 shows a schematic diagram of a point-to-point communication system based on dual-fiber bidirectional communication.
  • node A and node B are connected through two optical fibers.
  • Node A sends an optical signal to node B through optical fiber 1, and the wavelength of the optical signal in optical fiber 1 can be ⁇ A .
  • Node B sends an optical signal to node A through optical fiber 2, and the wavelength of the optical signal in optical fiber 2 may be ⁇ B .
  • the sizes of ⁇ A and ⁇ B are not limited.
  • Figure 2 shows a schematic diagram of a point-to-multipoint communication system based on dual-fiber bidirectional communication.
  • node A can be connected to n nodes, and node A can be connected to any node among the n nodes. Communication is achieved through two optical fibers, n is a positive integer.
  • the k-th node among the n nodes may be called node Bk, and k is a positive integer from 1 to n. Therefore, as shown in Figure 2, the n nodes may include nodes B1 to nodes Bn.
  • node A can be connected to the splitter 1 through the optical fiber 1, and the splitter 1 can be connected to different nodes among the n nodes through an optical fiber.
  • Node A can send an optical signal to any node among n nodes through optical fiber 1.
  • the optical signal sent by node A will first reach splitter 1 through optical fiber 1, and then will be distributed to n nodes through splitter 1. of n optical fibers, and then received by n nodes.
  • the optical signals sent by node A to different nodes among the n nodes may be distinguished in the time domain and/or frequency domain.
  • Node A can be connected to splitter 2 through optical fiber 2, and splitter 2 can be connected to different nodes among the n nodes through one optical fiber.
  • Node A can receive optical signals from n nodes through splitter 2.
  • the optical signal sent by any node among the n nodes to node A will first reach splitter 2 through the optical fiber between the node and splitter 2.
  • the wavelength of the optical signal sent by node A to node Bk is ⁇ Ak
  • the wavelength of the optical signal received by node A from node Bk is ⁇ Bk .
  • the wavelength of the optical signal sent by node A to node B1 is ⁇ A1
  • the wavelength of the optical signal received by node A from node B1 is ⁇ B1
  • the wavelength of the optical signal sent by node A to node B2 is ⁇ B1 .
  • the wavelength is ⁇ A2
  • the wavelength of the optical signal received by node A from node B2 is ⁇ B2
  • the wavelength of the optical signal sent by node A to node Bn is ⁇ An
  • the wavelength of the optical signal received by node A from node Bn is ⁇ Bn .
  • the sizes of ⁇ Ak and ⁇ Bk are not limited, the sizes of ⁇ Ak and ⁇ A(k-1) are not limited, and the sizes of ⁇ Bk and ⁇ B(k-1) are not limited.
  • the transmission and reception signals transmitted between the two communicating parties using different wavelengths in the same optical fiber can be called single-fiber two-way communication.
  • single-fiber bidirectional communication in order to avoid interference in different directions in the same optical fiber, the wavelengths used for receiving signals and sending signals are different.
  • Figure 3 shows a schematic diagram of a point-to-point communication system based on single-fiber bidirectional communication.
  • node 301 and node 302 are connected through an optical fiber.
  • the wavelength of the optical signal sent by node 301 to node 302 is ⁇ A
  • node 301 sends to
  • the wavelength of the optical signal of node 302 is ⁇ B , ⁇ A ⁇ ⁇ B .
  • Figure 4 shows a schematic diagram of a point-to-multipoint communication system based on single-fiber bidirectional communication.
  • node A can communicate with different nodes among n nodes through an optical fiber.
  • the n nodes The k-th node in can be called node Bk, n is a positive integer, and k is a positive integer from 1 to n. Therefore, as shown in FIG. 2, the n nodes may include node B1 to node Bn.
  • node A can be connected to the splitter 1 through the optical fiber 1, and the splitter 1 can be connected to different nodes among the n nodes through an optical fiber.
  • Node A can send optical signals to any one of the n nodes through optical fiber 1, and receive signals from any one of the n nodes.
  • the optical signal sent by node A will first reach splitter 1 through optical fiber 1, and then be distributed through splitter 1 to n optical fibers connected to n nodes, and then be received by n nodes.
  • the optical signals sent by different nodes among the n nodes of node A can be distinguished in the time domain and/or frequency domain.
  • the optical signal sent by any node among n nodes to node A will first reach splitter 1 through the optical fiber between the node and splitter 1, and then be aggregated to optical fiber 1 through splitter 1, and then be transmitted by node A. received.
  • the wavelength of the optical signal sent by node A to node Bk is ⁇ Ak
  • the wavelength of the optical signal received by node A from node Bk is ⁇ Bk .
  • the wavelength of the optical signal sent by node A to node B1 is ⁇ A1
  • the wavelength of the optical signal received by node A from node B1 is ⁇ B1
  • the wavelength of the optical signal sent by node A to node B2 is ⁇ B1 .
  • the wavelength is ⁇ A2
  • the wavelength of the optical signal received by node A from node B2 is ⁇ B2
  • the wavelength of the optical signal sent by node A to node Bn is ⁇ An
  • the wavelength of the optical signal received by node A from node Bn is ⁇ Bn .
  • ⁇ Ak ⁇ ⁇ Bk the sizes of ⁇ Ak and ⁇ A(k-1) are not limited, and the sizes of ⁇ Bk and ⁇ B(k-1) are not limited.
  • single-fiber two-way communication can use only one optical fiber to complete the work of two optical fibers, thus greatly saving optical fiber resources. Therefore, single-fiber two-way communication is currently widely used in the field of optical communications.
  • embodiments of this application provide a single-fiber two-way communication method. . . . . .
  • 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 single-fiber two-way communication method provided by the embodiment of the present application can be applied to the communication system as shown in Figure 3 or Figure 4.
  • the first node may be node A
  • the second node may be node B
  • the first node may be node A
  • the second node may be any one of node B1 to node Bn.
  • FIG. 5 is a schematic structural diagram of an optical module provided by an embodiment of the present application.
  • the optical module 50 may include a laser 501, a connection unit 502, a laser modulator 503, a coherent receiver 504, and a connection unit 505.
  • the laser 501 can be connected to the laser modulator 503 and the coherent receiver 504 through the connection unit 502, and the laser modulator 503 and the coherent receiver 504 can be connected to the same optical fiber through the connection unit 505.
  • the laser light emitted by the laser 501 can be input to the laser modulator 503 and the coherent receiver 504 respectively through the splitter 502.
  • the transmission optical signal output by the laser modulator 503 can be transmitted to the optical fiber through the connection unit 505.
  • the received optical signal from the optical fiber can be input to the coherent receiver 504 through the connection unit 505.
  • connection unit 502 may be an optical splitter or splitter
  • connection unit 505 may be a coupler, a circulator or a filter.
  • the laser modulator 503 may include two input interfaces. As shown in FIG. 5 , the sending electrical signal and the laser emitted by the laser 501 are the inputs of the laser modulator 503 . After the transmission electrical signal and the laser light emitted by the laser 501 are input to the laser modulator 503, the laser modulator 503 can modulate the transmission electrical signal on the amplitude of the laser light emitted by the laser, thereby outputting the transmission optical signal.
  • laser modulator 503 may be an intensity modulator.
  • the modulator can be a Mach-Zehnder modulator (MZM), an electroabsorption modulator (electro absorption modulator, EAM), etc.
  • MZM Mach-Zehnder modulator
  • EAM electroabsorption modulator
  • the coherent receiver 504 may include two input interfaces. As shown in FIG. 5 , the received optical signal and the laser emitted by the laser 501 are the inputs of the coherent receiver 504 . After the received optical signal and the laser light emitted by the laser 501 are input to the coherent receiver 504, the two beams of light are interfered and superimposed in the coherent receiver 504, and then converted and output by the photodetector to receive an electrical signal.
  • the laser emitted by the laser 501 can be used as the local oscillator laser of the coherent receiver 504, and the received light signal from the optical fiber can be used as the received signal light of the coherent receiver 504, which will be explained here.
  • the coherent receiver 504 may be a heterodyne coherent receiver or an intradyne coherent receiver.
  • the heterodyne coherent receiver may include a single polarization heterodyne coherent receiver and a dual polarization heterodyne coherent receiver
  • the intradyne coherent receiver may include a single polarization intradyne coherent receiver and a dual polarization intradyne coherent receiver.
  • single-polarization heterodyne coherent receivers and single-polarization intradyne coherent receivers are suitable for scenarios where the received optical signal is single-polarized light
  • dual-polarization heterodyne coherent receivers and dual-polarization intradyne coherent receivers are suitable for scenarios where the received optical signal is single-polarized light. Dual polarized light scene.
  • the first node can communicate with the second node through a first optical module.
  • the first optical module can include a first laser, a first connection unit, a first coherent receiver, a first laser modulator and a third Two connection units.
  • the structure of the first optical module can be similar to the optical module shown in Figure 5.
  • the first laser can be a laser 501
  • the first connection unit can be a connection unit 502
  • the first laser modulator can be The laser modulator 503, the first coherent receiver may be the coherent receiver 504, and the second connection unit may be the connection unit 505.
  • the second node may communicate with the first node through a second optical module
  • the second optical module may include a second laser, a third connection unit, a second coherent receiver, a second laser modulator, and a fourth connection unit.
  • the structure of the second optical module can be similar to the optical module shown in Figure 5.
  • the second laser can be a laser 501
  • the third connection unit can be a connection unit 502
  • the second laser modulator can be The laser modulator 503, the second coherent receiver may be the coherent receiver 504, and the fourth connection unit may be the connection unit 505.
  • Figure 6 shows a flow chart of a single-fiber two-way communication method provided by this application.
  • the first node can The second node can communicate with the second node through the first optical module, and the second node can communicate with the first node through the second optical module.
  • the description of the first optical module and the second optical module can be as shown above.
  • the single-fiber two-way communication method provided in this embodiment includes the following steps 601 and 602.
  • Step 601 The first node sends the first optical signal to the second node through the first laser modulator.
  • the second node receives the first optical signal through the second coherent receiver.
  • the first optical signal may be obtained by modulating the laser light emitted by the first laser by the first laser modulator.
  • the first laser modulator may receive laser light emitted by the first laser through the first connection unit. Afterwards, the first laser modulator can modulate according to the first electrical signal and the laser light emitted by the first laser, thereby obtaining the first optical signal.
  • the first optical signal sent by the first laser modulator can be transmitted to the optical fiber through the second connection unit, and then sent to the second node through the optical fiber.
  • the laser emitted by the second laser can be used as the local oscillator light of the second coherent receiver.
  • the second coherent receiver can receive the first optical signal from the optical fiber through the fourth connection unit, and can receive the laser light emitted from the second laser through the third connection unit. Afterwards, the second coherent receiver can process the first optical signal and the laser emitted by the second laser to obtain the first electrical signal.
  • Step 602 The second node sends a second optical signal to the first node through the second laser modulator.
  • the first node receives the second optical signal from the second node through the first coherent receiver.
  • the second optical signal may be obtained by modulating the laser light emitted by the second laser by the second laser modulator.
  • the second laser modulator can receive the laser light emitted by the second laser through the third connection unit. Afterwards, the second laser modulator can modulate according to the second electrical signal and the laser light emitted by the first laser, thereby obtaining a second optical signal.
  • the second optical signal sent by the second laser modulator can be transmitted to the optical fiber through the fourth connection unit, and then sent to the first node through the optical fiber.
  • the laser emitted by the first laser can be used as the local oscillator light of the first coherent receiver.
  • the first coherent receiver can receive the second optical signal from the optical fiber through the second connection unit, and can receive the laser light emitted from the first laser through the first connection unit. Afterwards, the first coherent receiver can process the second optical signal and the laser emitted by the first laser to obtain a second electrical signal.
  • the first node can transmit the first optical signal and receive the second optical signal through the first laser, and the second node can transmit the second optical signal through the second laser. signal and the function of receiving the first light signal.
  • both the first node and the second node only need to use one laser, which can effectively reduce the cost of optical communication.
  • the center frequency of the first optical signal may be f 1
  • the center frequency of the second optical signal may be f 2
  • f 1 is different from f 2
  • is less than the first threshold. It should be understood that the difference between f 1 and f 2 can cause less interference when the first optical signal and the second optical signal are transmitted on the same optical fiber. And
  • the frequency range of the second optical signal The range will exceed the receiving frequency range of the first coherent receiver, and the first node cannot correctly receive the second optical signal through the first coherent receiver; and, the frequency range of the first optical signal will exceed the receiving frequency range of the second coherent receiver. , the second node cannot correctly receive the first optical signal through the second coherent receiver.
  • the magnitude relationship between the center frequency f 1 of the first optical signal and the center frequency f 2 of the second optical signal may not be limited, f 1 ⁇ f 2 , or, f 2 ⁇ f 1 .
  • the first threshold is related to the frequency range that the first laser modulator and the second laser modulator can modulate, and the receiving frequency range of the first coherent receiver and the second coherent receiver.
  • the first optical signal and the second optical signal may be single-wavelength signals or signals composed of multiple sub-wavelengths, which is not limited in this application.
  • the first optical signal and the second optical signal have a certain bandwidth and occupy a continuous frequency range.
  • the maximum frequency band width of the first optical signal may be w 1
  • the maximum frequency band width of the second optical signal may be w 2 .
  • the frequency range of the first optical signal does not overlap or partially overlaps the frequency range of the second optical signal.
  • f 1 and f 2 satisfy and It can ensure that the interference between the first optical signal and the second optical signal is small and does not affect the two-way communication.
  • the frequency range of the first optical signal and the frequency range of the second optical signal do not overlap, the first optical signal and the second optical signal will not interfere with each other.
  • the modulation bandwidth that needs to be configured for the second laser modulator is smaller, and the receiving bandwidth that needs to be configured for the first coherent receiver and the second coherent receiver is also smaller.
  • the frequency range of the first optical signal and the frequency range of the second optical signal are continuous in the time domain.
  • FIG. 7 shows a method of the first optical signal and the second optical signal. Schematic diagram.
  • FIG. 8 shows another first optical signal and the second optical signal.
  • the output frequency of the first laser is f 3 , then or, in, or is the minimum frequency value in the frequency range occupied by the first optical signal and the second optical signal, or is the maximum frequency value in the frequency range occupied by the first optical signal and the second optical signal.
  • the output frequency of the first laser is located between the minimum frequency value in the frequency range occupied by the first optical signal and the second optical signal and the maximum frequency value in the frequency range occupied by the first optical signal and the second optical signal. between. It should be understood that if the output frequency of the first laser meets the above requirements, the bandwidth requirements for the first laser modulator and the first coherent receiver can be reduced.
  • the output frequency of the first laser is within the frequency range of the first optical signal and the second optical signal.
  • the output frequency of the first laser is within the frequency range of the first optical signal and the second optical signal.
  • the required bandwidth range is smaller.
  • the bandwidth range required by the first laser modulator and the first coherent receiver will increase. .
  • the output frequency of the second laser is f 4 , then or, In other words, the output frequency of the second laser is located between the minimum frequency value in the frequency range occupied by the first optical signal and the second optical signal and the maximum frequency value in the frequency range occupied by the first optical signal and the second optical signal. between. It should be understood that if the output frequency of the second laser meets the above requirements, the bandwidth requirements for the second laser modulator and the second coherent receiver can be reduced.
  • the output frequency of the second laser is within the frequency range of the first optical signal and the second optical signal.
  • the output frequency of the second laser is within the frequency range of the first optical signal and the second optical signal.
  • f 3 can be equal to f 1 and f 4 can be equal to f 2 .
  • the frequency range of the second optical signal received by the first coherent receiver is (f 3 - ⁇ x) to f 3 and f 3 to (f 3 + ⁇ x)
  • the frequency range occupied by the second optical signal is within the receiving frequency range of the first coherent receiver, ensuring that the first coherent receiver can receive the second optical signal.
  • the frequency range of the second coherent receiver receiving the first optical signal is (f 4 - ⁇ y) to f 4 and f 4 to (f 4 + ⁇ y)
  • the frequency range occupied by the first optical signal is within the receiving frequency range of the second coherent receiver, ensuring that the second coherent receiver can receive the first optical signal.
  • the first node and the second node can also adjust the first optical signal and/or the second optical signal through signaling interaction.
  • the adjustment of the first optical signal and/or the second optical signal includes adjustment of the center frequency and/or adjustment of the bandwidth.
  • Figure 9 shows a flow chart of another single-fiber two-way communication method provided by this application.
  • the single-fiber two-way communication method provided by this application may include steps 901 to Step 905.
  • Step 901 The first node sends the first parameter used to adjust the first optical signal to the second node. Accordingly, the second node receives the first parameter from the first node.
  • the first parameter may be a parameter related to adjusting the center frequency of the first optical signal.
  • the first parameter may be the adjusted center frequency f′ 1 of the first optical signal.
  • the first parameter may be a parameter related to adjusting the bandwidth of the first optical signal.
  • the first parameter may be the maximum frequency bandwidth w′ 1 occupied by the adjusted first optical signal, or the first parameter may be the difference between the maximum frequency bandwidth occupied by the adjusted first optical signal and the value before adjustment.
  • the difference ⁇ w 1 between the maximum frequency bandwidths occupied by the first optical signal, ⁇ w 1 w' 1 -w 1 .
  • the first parameter may be a parameter related to adjusting the center frequency and bandwidth of the first optical signal.
  • the first parameter may include w′ 1 and f′ 1 , or ⁇ w 1 and f′ 1 .
  • Step 902 The second node sends the first indication information to the first node.
  • the first node receives the first indication information from the second node.
  • the first indication information is used to instruct the second node to agree to adjust the first optical signal according to the first parameter.
  • the second node may send the first indication to the first node. information.
  • the first node After receiving the first indication information from the second node, the first node determines that the first optical signal can be adjusted, and then performs subsequent steps 903 to 905.
  • Step 903 The first node sends the second indication information to the second node.
  • the second node receives the second indication information from the first node.
  • the second indication information is used to instruct the first node to start adjusting the first optical signal.
  • the second node After receiving the second indication information, the second node can learn that the first node begins to adjust the first optical signal, and then the second node will be in a waiting state until it learns that the first node has completed the adjustment. When in the waiting state, the second node does not send a signal to the first node.
  • Step 904 The first node adjusts the maximum frequency bandwidth of the first optical signal to w′ 1 and/or adjusts the center frequency of the first optical signal to f′ 1 .
  • the first node can adjust the center frequency of the first optical signal to f' 1 .
  • the first node may adjust the maximum frequency bandwidth of the first optical signal to w′ 1 .
  • the first node can adjust the maximum frequency bandwidth of the first optical signal to w' 1 , and change the first The center frequency of the optical signal is adjusted to f′ 1 .
  • Step 905 The first node sends third indication information to the second node.
  • the second node receives the third indication information from the first node.
  • the third indication information is used to indicate that the first node has completed the adjustment of the first optical signal.
  • the second node After receiving the third indication information, the second node ends the waiting state.
  • the second node may also adaptively adjust the receiving frequency range of the second coherent receiver according to the first parameter to determine that the adjusted first optical signal can be received.
  • the frequency range of the second coherent receiver receiving the adjusted first optical signal is (f 4 - ⁇ a) to f 4 and f 4 to (f 4 + ⁇ a) ,
  • the second coherent receiver The frequency range of receiving the adjusted first optical signal is (f 4 - ⁇ b) to f 4 and f 4 to (f 4 + ⁇ b),
  • the center frequency of the adjusted first optical signal is adjusted to f′ 1 and the maximum frequency bandwidth is adjusted to w′ 1
  • the second The frequency range of the coherent receiver receiving the adjusted first optical signal is (f 4 - ⁇ c) to f 4 and f 4 to (f 4 + ⁇ c)
  • Figure 10 shows a flow chart of yet another single-fiber two-way communication method provided by this application.
  • the single-fiber two-way communication method provided by this application may include steps 1001 to Step 1005.
  • Step 1001 The first node sends the second parameter used to adjust the second optical signal to the second node. Accordingly, the second node receives the second parameter from the first node.
  • the second parameter may be a parameter related to adjusting the center frequency of the second optical signal.
  • the second parameter may be the center frequency f′ 2 of the adjusted second optical signal.
  • the second parameter may be a parameter related to adjusting the bandwidth of the second optical signal.
  • the second parameter may be the maximum frequency bandwidth w′ 2 occupied by the adjusted second optical signal, or the second parameter may be the maximum frequency bandwidth occupied by the adjusted second optical signal and the difference between the maximum frequency bandwidth occupied by the adjusted second optical signal and the pre-adjusted value.
  • the difference ⁇ w 2 between the maximum frequency bandwidths occupied by the second optical signal, ⁇ w 2 w′ 2 -w 2 .
  • the second parameter may be a parameter related to adjusting the center frequency and bandwidth of the second optical signal.
  • the second parameter may include w′ 2 and/or f′ 2 , or ⁇ w 2 and/or f′ 2 .
  • Step 1002 The second node sends fourth indication information to the first node.
  • the first node receives the fourth indication information from the second node.
  • the fourth indication information is used to instruct the second node to agree to the second parameter according to the second parameter. Two light signals are adjusted.
  • the second node sends the fourth indication to the first node. information.
  • the first node After receiving the fourth indication information from the second node, the first node determines that the second optical signal can be adjusted, and then performs subsequent steps 1003 to 1005.
  • Step 1003 The first node sends fifth indication information to the second node.
  • the second node receives the fifth indication information from the first node.
  • the fifth instruction information is used to instruct the second node to start adjusting the second optical signal.
  • the second node may start adjusting the second optical signal according to the instruction of the fifth instruction information.
  • the first node After sending the fifth indication information, the first node will be in a waiting state until it is informed that the second node has completed the adjustment. When in the waiting state, the first node does not send a signal to the second node.
  • Step 1004 The second node adjusts the maximum frequency bandwidth of the second optical signal to w′ 2 and/or adjusts the center frequency of the second optical signal to f′ 2 .
  • the first node can adjust the center frequency of the first optical signal to f' 2 .
  • the first node may adjust the maximum frequency bandwidth of the first optical signal to w′ 2 .
  • the first node can adjust the maximum frequency bandwidth of the first optical signal to w' 2 , and change the first The center frequency of the optical signal is adjusted to f′ 2 .
  • Step 1005 The second node sends sixth indication information to the first node.
  • the first node receives the sixth indication information from the second node.
  • the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the first node After receiving the sixth indication information, the first node ends the waiting state.
  • the first node may also adaptively adjust the receiving frequency range of the first coherent receiver according to the second parameter to determine that the adjusted second optical signal can be received.
  • the first coherent receiver The frequency range of receiving the adjusted second optical signal is (f 3 - ⁇ d) to f 3 and f 3 to (f 3 + ⁇ d),
  • the first coherent receiver The frequency range of receiving the adjusted second optical signal is (f 3 - ⁇ e) to f 3 and f 3 to (f 3 + ⁇ e),
  • the center frequency of the adjusted first optical signal is adjusted to f' 2 and the maximum frequency bandwidth is adjusted to w' 2
  • the output frequency of the first laser is f 3
  • the first The frequency range of the coherent receiver receiving the adjusted second optical signal is (f 3 - ⁇ f) to f 3 and f 3 to (f 3 + ⁇ f)
  • Figure 11 shows a flow chart of yet another single-fiber two-way communication method provided by this application.
  • the single-fiber two-way communication method provided by this application May include step 1101 to step 1108.
  • Step 1101 The first node sends a third parameter for adjusting the first optical signal and the second optical signal to the second node. Accordingly, the second node receives the third parameter from the first node.
  • the third parameter may be the same as adjusting the center frequency of the first optical signal and adjusting the center frequency of the second optical signal. related parameters.
  • the third parameter may include f′ 1 and f′ 2 .
  • the third parameter may be a parameter related to adjusting the bandwidth of the first optical signal and adjusting the bandwidth of the second optical signal.
  • the three parameters may include w′ 1 and w′ 2 , or ⁇ w 1 and ⁇ w 2 , or w′ 1 and ⁇ w 2 , or ⁇ w 1 and w′ 2 .
  • the third parameter may be related to adjusting the bandwidth of the first optical signal and adjusting the center frequency of the second optical signal. parameter.
  • the third parameter may include w′ 1 and f′ 2 , or ⁇ w 1 and f′ 2 .
  • the third parameter may be the same as adjusting the bandwidth of the first optical signal, adjusting the center frequency of the first optical signal, and parameters related to adjusting the center frequency of the second optical signal.
  • the third parameter may include w′ 1 , f′ 1 , and f′ 2 , or ⁇ w 1 , f′ 1 , and f′ 2 .
  • the third parameter may be related to adjusting the bandwidth of the second optical signal and adjusting the center frequency of the first optical signal. parameter.
  • the third parameter may include w′ 2 and f′ 1 , or ⁇ w 2 and f′ 1 .
  • the third parameter may be the same as adjusting the bandwidth of the second optical signal, adjusting the center frequency of the second optical signal, and parameters related to adjusting the center frequency of the first optical signal.
  • the third parameter may include w′ 2 , f′ 2 , and f′ 1 , or ⁇ w 2 , f′ 2 , and f′ 1 .
  • Step 1102 The second node sends seventh indication information to the first node.
  • the first node receives the seventh indication information from the second node.
  • the seventh indication information is used to instruct the second node to agree to adjust the first optical signal and the second optical signal according to the third parameter.
  • the second node can send the seventh indication information to the first node.
  • the first node After receiving the seventh indication information from the second node, the first node determines that the first optical signal and the second optical signal can be adjusted, and then performs subsequent steps 1103 to 1108.
  • Step 1103 The first node sends the second indication information to the second node.
  • the second node receives the second indication information from the first node.
  • the second indication information is used to instruct the first node to start adjusting the first optical signal.
  • step 1103 reference may be made to the relevant description of step 903, which will not be described again here.
  • Step 1104 The first node adjusts the maximum frequency bandwidth of the first optical signal to w′ 1 and/or adjusts the center frequency of the first optical signal to f′ 1 .
  • the first node may adjust the center frequency of the first optical signal to f′ 1 .
  • the first node may adjust the maximum frequency bandwidth of the first optical signal to w′ 1 .
  • the first node can adjust the maximum frequency bandwidth of the first optical signal to w' 1 , and adjust the The center frequency of an optical signal is adjusted to f′ 1 .
  • Step 1105 The first node sends third indication information to the second node.
  • the second node receives the third indication information from the first node.
  • the third indication information is used to instruct the first node to complete the adjustment of the first optical signal.
  • step 1105 reference may be made to the relevant description of step 905, which will not be described again here.
  • Step 1106 The first node sends fifth indication information to the second node.
  • the second node receives the fifth indication information from the first node.
  • the fifth instruction information is used to instruct the second node to start adjusting the second optical signal.
  • step 1106 reference may be made to the relevant description of step 1003, which will not be described again here.
  • Step 1107 The second node adjusts the maximum frequency bandwidth of the second optical signal to w′ 2 and/or adjusts the center frequency of the second optical signal to f′ 2 .
  • the second node may adjust the center frequency of the second optical signal to f′ 2 .
  • the second node may adjust the maximum frequency bandwidth of the second optical signal to w′ 2 .
  • the second node can adjust the maximum frequency bandwidth of the second optical signal to w' 2 , and adjust the The center frequency of an optical signal is adjusted to f′ 2 .
  • Step 1108 The second node sends sixth indication information to the first node.
  • the first node receives the sixth indication information from the second node.
  • the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • step 1108 reference may be made to the relevant description of step 1005, which will not be described again here.
  • Figure 12 shows a flow chart of yet another single-fiber two-way communication method provided by this application.
  • the single-fiber two-way communication method provided by this application The method may include steps 1201 to 1208.
  • Step 1201 The first node sends the third parameter used to adjust the first optical signal and the second optical signal to the second node. Accordingly, the second node receives the third parameter from the first node.
  • step 1201 reference may be made to the relevant description of step 1101, which will not be described again here.
  • Step 1202 The second node sends seventh indication information to the first node.
  • the first node receives the seventh indication information from the second node.
  • the seventh indication information is used to instruct the second node to agree to adjust the first optical signal and the second optical signal according to the third parameter.
  • step 1202 reference may be made to the relevant description of step 1102, which will not be described again here.
  • Step 1203 The first node sends fifth indication information to the second node.
  • the second node receives the fifth indication information from the first node.
  • the fifth instruction information is used to instruct the second node to start adjusting the second optical signal.
  • step 1203 reference may be made to the relevant description of step 1106, which will not be described again here.
  • Step 1204 The second node adjusts the maximum frequency bandwidth of the second optical signal to w′ 2 and/or adjusts the center frequency of the second optical signal to f′ 2 .
  • step 1204 reference may be made to the relevant description of step 1107, which will not be described again here.
  • Step 1205 The second node sends sixth indication information to the first node.
  • the first node receives the sixth indication information from the second node.
  • the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • step 1205 reference may be made to the relevant description of step 1108, which will not be described again here.
  • Step 1206 The first node sends the second indication information to the second node.
  • the second node receives the second indication information from the first node.
  • the second indication information is used to instruct the first node to start adjusting the first optical signal.
  • step 1206 reference may be made to the relevant description of step 1103, which will not be described again here.
  • Step 1207 The first node adjusts the maximum frequency bandwidth of the first optical signal to w′ 1 and/or adjusts the center frequency of the first optical signal to f′ 1 .
  • step 1207 reference may be made to the relevant description of step 1104, which will not be described again here.
  • Step 1208 The first node sends third indication information to the second node.
  • the second node receives the third indication information from a node.
  • the third indication information is used to instruct the first node to complete the adjustment of the first optical signal.
  • step 1208 reference may be made to the relevant description of step 1105, which will not be described again here.
  • the adjustment of the first optical signal and/or the second optical signal transmitted between the first node and the second node can be achieved.
  • modulating the bandwidth of the first optical signal may be to increase the bandwidth of the first optical signal, or it may be to decrease the bandwidth of the first optical signal.
  • Modulating the bandwidth of the second optical signal may include increasing the bandwidth of the second optical signal, or decreasing the bandwidth of the second optical signal.
  • Increasing the bandwidth of an optical signal can be understood as expanding the communication bandwidth.
  • the methods in the embodiments corresponding to Figures 9 to 12 mentioned above can be used to expand the bandwidth of single-fiber bidirectional communication.
  • the communication bandwidth in optical communication needs to be expanded, it is generally necessary to add additional optical modules to increase optical signals, thereby increasing the communication bandwidth.
  • both parties in communication can increase the bandwidth of the optical signal by configuring the optical module, thereby improving the communication bandwidth. This method does not require the introduction of additional components to implement and can reduce costs.
  • Figure 13 shows a schematic diagram of expanding the first optical signal. As shown in Figure 13, the center frequencies of the first optical signal and the second optical signal do not need to be adjusted. The maximum frequency band of the first optical signal is directly The width is expanded from w 1 to w′ 1 .
  • the first node may also determine that the center frequency of the first optical signal and/or the second optical signal needs to be adjusted.
  • Figure 14 shows another schematic diagram of expanding the first optical signal.
  • the center frequency of the first optical signal can be adjusted to f'1 first, so that Then the bandwidth of the first optical signal is expanded from w 1 to w' 1 .
  • Figure 15 shows another schematic diagram of expanding the first optical signal.
  • the center frequency of the second optical signal can be adjusted to f′ 2 first, so that Then the bandwidth of the first optical signal is expanded from w 1 to w' 1 .
  • the capacity expansion method for the second optical signal is similar to the capacity expansion method for the first optical signal in the above-mentioned FIGS. 13 to 15 , and will not be described again here.
  • the single-fiber two-way communication method described in the above embodiment can be applied to a point-to-point communication system (the point-to-point communication system shown in Figure 3).
  • the first node may be node A in Figure 3
  • the second node may be node B in Figure 3.
  • the single-fiber two-way communication method described in the above embodiment can be applied to a point-to-multipoint communication system (the point-to-multipoint communication system shown in Figure 4).
  • the first node can communicate with n nodes through the first optical module
  • the second node can be one of the n nodes.
  • n n ⁇ 2.
  • the first node may be node A in FIG. 4
  • the second node may be any one of node B1 to node Bn in FIG. 4 .
  • the first optical signal is the optical signal Ak sent by the first node to the k-th node among n nodes
  • the second optical signal is The optical signal is the optical signal B k sent by the k-th node among the n nodes to the first node.
  • f Ak is the center frequency of the optical signal A k
  • f Bk is the center frequency of the optical signal B k
  • k is a positive integer from 1 to n.
  • the relationship between the center frequencies of the optical signal A k and the optical signal B k is not limited.
  • the frequency range of the optical signal Ak does not overlap or partially overlaps the frequency range of the optical signal B k .
  • the maximum frequency bandwidth of the optical signal A k is the maximum frequency bandwidth of the optical signal B k .
  • the relationship between the center frequencies of the optical signals transmitted between the first node and different nodes among the n nodes is not limited in this application. That is, the magnitude relationship between f Ak and f Ax , the magnitude relationship between f Ak and f Bx , the magnitude relationship between f Bk and f Ax , and the magnitude relationship between f Bk and f Bx are not limited.
  • f Ax is the center frequency of the optical signal A x sent by the first node to the x-th node among n nodes
  • f Bx is the optical signal B x sent by the x-th node among n nodes to the first node.
  • the center frequency of , x is a positive integer from 1 to n, and x is not equal to k.
  • the center frequencies of optical signals transmitted between the first node and different nodes among the n nodes may be different. That is, the center frequency of the optical signal A x is different from that of the optical signal A k or the optical signal B k .
  • the center frequency of the optical signal B Bx The center frequency of the optical signal B Bx .
  • 2n optical signals with different center frequencies are transmitted between the first node and n nodes, that is, the optical signals transmitted between the first node and n nodes use 2n different wavelengths.
  • the number of center frequencies used by the optical signals transmitted between the first node and the n nodes is less than 2n, that is, the number of wavelengths used by the optical signals transmitted between the first node and the n nodes is less than 2n.
  • the optical signal Ax and the optical signal Ak can be distinguished in the time domain. If the center frequencies of the optical signal B x and the optical signal B k are the same (that is, the wavelengths are the same), the optical signal B x and the optical signal B k can be distinguished in the time domain.
  • the optical signal A k and the optical signal B k may be adjacent in the frequency domain. That is, the center frequencies of the optical signal A k and the optical signal B k are both smaller than the center frequencies of the optical signal A x and the optical signal B x , or the central frequencies of the optical signal A k and the optical signal B k are both greater than the optical signal A x and the optical signal B The center frequency of B x .
  • f Ak >f A(k-1)
  • f Ak >f B(k-1)
  • f Bk >f A(k-1)
  • f Bk >f B(k-1)
  • the frequency range of the optical signals transmitted between the first node and different nodes among the n nodes does not repeat or partially repeats.
  • w Ax is the maximum frequency bandwidth of the optical signal A x
  • w Bx is the maximum frequency bandwidth of the optical signal B x .
  • the first node may be continuous in the frequency domain.
  • the maximum frequency bandwidth of the optical signals transmitted between the first node and different nodes among the n nodes may be the same or different. If the maximum frequency bandwidth of the optical signal transmitted between the first node and different nodes among the n nodes is different, it means that the communication bandwidth between the first node and different nodes among the n nodes is different.
  • a schematic diagram of optical signals transmitted between the first node and n nodes can be shown in Figure 16, where the optical signals A 1 to optical signals A n and the optical signals B 1 to optical signals B n
  • the maximum frequency bandwidth is the same, and the occupied frequency range is continuous in the frequency domain, f A1 ⁇ f B1 ⁇ f A2 ⁇ f B2 ⁇ ... ⁇ f A(n-1) ⁇ f B(n-1) ⁇ f An ⁇ fBn .
  • the maximum frequency bandwidths of the optical signals A 1 to A n and the optical signals B 1 to B n are the same, and the occupied frequency ranges are continuous in the frequency domain, f B1 ⁇ f A1 ⁇ f B2 ⁇ f A2 ⁇ ... ⁇ f B(n-1) ⁇ f A(n-1) ⁇ f Bn ⁇ f An .
  • the schematic diagram of the optical signals transmitted between the first node and n nodes can be as shown in (A) in Figure 18, where the optical signals A 1 to optical signals A n , and The maximum frequency bandwidth of optical signal B 1 to optical signal B n is the same, and the occupied frequency range is continuous in the frequency domain, f A1 ⁇ f B1 ⁇ f B2 ⁇ f A2 ⁇ ... ⁇ f A(n-1) ⁇ f B(n-1) ⁇ f Bn ⁇ f An .
  • the schematic diagram of the optical signals transmitted between the first node and n nodes can be shown in (B) in Figure 18, where the optical signals A 1 to optical signals A n , and the optical signals B 1 to The maximum frequency bandwidth of the optical signals B n is the same, and the occupied frequency range is continuous in the frequency domain, f A1 ⁇ f B1 ⁇ f B2 ⁇ f A2 ⁇ ... ⁇ f B(n-1) ⁇ f A(n-1 ) ⁇ f An ⁇ f Bn .
  • the schematic diagram of the optical signals transmitted between the first node and n nodes can be as shown in (A) in Figure 19, where the optical signals A 1 to optical signals A n , and The maximum frequency bandwidth of the optical signal B 1 to the optical signal B n is the same, and the occupied frequency range is continuous in the frequency domain, f B1 ⁇ f A1 ⁇ f A2 ⁇ f B2 ⁇ ... ⁇ f B(n-1) ⁇ f A(n-1) ⁇ f An ⁇ f Bn .
  • the schematic diagram of the optical signals transmitted between the first node and n nodes can be shown in (B) in Figure 19, where the optical signals A 1 to optical signals A n , and the optical signals B 1 to The maximum frequency bandwidth of the optical signals B n is the same, and the occupied frequency range is continuous in the frequency domain, f B1 ⁇ f A1 ⁇ f A2 ⁇ f B2 ⁇ ... ⁇ f A(n-1) ⁇ f B(n-1 ) ⁇ f Bn ⁇ f An .
  • the receiving frequency range of the first node receiving the optical signal Bk can be adjusted to to This can reduce the probability that the first node receives multiple optical signals at the same time, and reduce interference when the first node receives the optical signal Bk .
  • the first condition is: when k>1, f Ak >f A(k-1) , and f Ak >f B(k-1) , and f Bk >f A(k-1) , and f Bk >f B(k-1) .
  • f Ak ⁇ f Bk if k is an odd number, f Ak ⁇ f Bk , and if k is an even number, f Bk ⁇ f Ak .
  • the second condition is: when k>1, f Ak >f A(k-1) , and f Ak >f B(k-1) , and f Bk >f A(k-1) , and f Bk >f B(k-1) . And, if k is an odd number, f Bk ⁇ f Ak , and if k is an even number, f Ak ⁇ f Bk .
  • the optical signal shown in Figure 18 meets the first condition
  • the optical signal shown in Figure 19 meets the second condition.
  • the receiving frequency range of the first node receiving optical signal B2 is set to to Then the first node will only receive the optical signal B 2 within this frequency range, but will not receive the optical signal B 1 or the optical signal B 3 .
  • the first node and any one of the n nodes may also interact through signaling to adjust the optical signal Ak and/or the optical signal B k .
  • the adjustment of the optical signal Ak and/or the optical signal Bk includes the adjustment of the center frequency and/or the adjustment of the bandwidth.
  • Figure 20 shows a flow chart of yet another single-fiber two-way communication method provided by this application.
  • the single-fiber two-way communication method provided by this application may include steps 2001 to Step 2005.
  • Step 2001 The first node sends the fourth parameter used to adjust the optical signal Ak to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the fourth parameter from the first node.
  • the fourth parameter may be a parameter related to adjusting the center frequency of the optical signal Ak .
  • the fourth parameter may be the center frequency f ′Ak of the adjusted optical signal Ak .
  • the fourth parameter may be a parameter related to adjusting the bandwidth of the optical signal Ak .
  • the fourth parameter may be the maximum frequency bandwidth w′ Ak occupied by the adjusted optical signal Ak , or the fourth parameter may be the maximum frequency bandwidth occupied by the adjusted optical signal Ak and the difference between the maximum frequency bandwidth occupied by the adjusted optical signal Ak and before adjustment.
  • the difference ⁇ w Ak between the maximum frequency bandwidth occupied by the optical signal Ak , ⁇ w Ak w′ Ak -w Ak .
  • the fourth parameter may be a parameter related to adjusting the bandwidth and the center frequency of the optical signal Ak .
  • the fourth parameter may include w′ Ak and f′ Ak , or ⁇ w Ak and f′ Ak .
  • Step 2002 The k-th node among the n nodes sends eighth indication information to the first node.
  • the first node receives the eighth indication information from the k-th node among the n nodes.
  • the eighth indication information is used to instruct the k-th node among the n nodes to agree to adjust the optical signal Ak according to the fourth parameter.
  • the k-th node among the n nodes A node may send the eighth indication information to the first node.
  • the first node After receiving the eighth indication information from the k-th node among the n nodes, the first node determines that the optical signal Ak can be adjusted, and then performs subsequent steps 2003 to 2005.
  • Step 2003 The first node sends the ninth indication information to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the ninth indication information from the first node.
  • the ninth instruction information is used to instruct the first node to start adjusting the optical signal Ak .
  • the k-th node among n nodes can learn that the first node begins to adjust the optical signal A k . Then the k-th node among n nodes will be in a waiting state until it is informed that The adjustment of the first node is completed. When in the waiting state, the k-th node among the n nodes does not send a signal to the first node.
  • Step 2004 The first node adjusts the maximum frequency bandwidth of the optical signal Ak to w′ Ak , and/or adjusts the center frequency of the optical signal Ak to f′ Ak .
  • the first node can adjust the center frequency of the optical signal Ak to f' Ak .
  • the first node can adjust the maximum frequency bandwidth of the optical signal Ak to w' Ak .
  • the first node can adjust the maximum frequency bandwidth of the optical signal Ak to w′ 1 , and change the first The center frequency of the optical signal is adjusted to f′ 1 .
  • Step 2005 The first node sends the tenth indication information to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the tenth indication information from the first node.
  • the tenth indication information is used to instruct the first node to complete the adjustment of the optical signal Ak .
  • the waiting state ends.
  • the k-th node among the n nodes can also adaptively adjust the receiving frequency of the coherent receiver in the node according to the fourth parameter. range to determine that the adjusted optical signal Ak can be received.
  • the coherent receiver of the k-th node among n nodes receives the adjusted optical signal A k in the frequency range from (f LBk - ⁇ g) to f LBk and f LBk to (f LBk + ⁇ g),
  • the coherent receiver of the k-th node among n nodes receives the adjusted optical signal A k in the frequency range from (f LBk - ⁇ h) to f LBk and f LBk to (f LBk + ⁇ h),
  • the center frequency of the adjusted optical signal Ak is adjusted to f′ Ak and the maximum frequency bandwidth is adjusted to w′ Ak
  • the output frequency is f LBk .
  • the coherent receiver of the k-th node among the n nodes receives the adjusted optical signal A k .
  • the frequency range is (f LBk - ⁇ i) to f LBk and f LBk to (f LBk + ⁇ i).
  • Figure 21 shows a flow chart of yet another single-fiber two-way communication method provided by this application.
  • the single-fiber two-way communication method provided by this application may include steps 2101 to Step 2105.
  • Step 2101 The first node sends the fifth parameter used to adjust the optical signal B k to the k-th node among the n nodes. Accordingly, the k-th node among the n nodes receives the fifth parameter from the first node.
  • the fifth parameter may be a parameter related to adjusting the center frequency of the optical signal B k .
  • the fifth parameter may be the center frequency f′ Bk of the adjusted optical signal Bk .
  • the fifth parameter may be a parameter related to adjusting the bandwidth of the optical signal B k .
  • the fifth parameter may be the maximum frequency bandwidth w′ Bk occupied by the adjusted optical signal B k
  • the fifth parameter may be the maximum frequency bandwidth occupied by the adjusted optical signal B k and the difference between the maximum frequency bandwidth occupied by the adjusted optical signal B k and the previous adjustment.
  • the difference ⁇ w Bk between the maximum frequency bandwidths occupied by the optical signal B k , ⁇ w Bk w′ Bk -w Bk .
  • the fifth parameter may be a parameter related to adjusting the bandwidth and the center frequency of the optical signal B k .
  • the fifth parameter may include w′ Bk and f′ Bk , or ⁇ w Bk and f′ Bk .
  • Step 2102 The k-th node among the n nodes sends eleventh indication information to the first node.
  • the first node receives the eleventh indication information from the k-th node among the n nodes.
  • the eleventh indication information is used to instruct the k-th node among the n nodes to agree to adjust the optical signal B k according to the fifth parameter.
  • the n nodes In order to send the eleventh indication information to the first node.
  • the first node After receiving the eleventh indication information from the k-th node among the n nodes, the first node determines that the optical signal B k can be adjusted, and then performs subsequent steps 2103 to 2105.
  • Step 2103 The first node sends the twelfth indication information to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the twelfth indication information from the first node.
  • the twelfth instruction information is used to instruct the k-th node among the n nodes to start adjusting the optical signal B k .
  • the k-th node among the n nodes may start to adjust the second optical signal according to the instruction of the twelfth instruction information.
  • the first node After sending the twelfth indication information, the first node will be in a waiting state until it learns that the k-th node among the n nodes has completed the adjustment. When in the waiting state, the first node does not send a signal to the k-th node among the n nodes.
  • Step 2104 The k-th node among the n nodes adjusts the maximum frequency bandwidth of the optical signal B k to w' Bk , and/or adjusts the center frequency of the optical signal B k to f' Bk .
  • the first node can adjust the center frequency of the optical signal Bk to f' Bk .
  • the first node can adjust the maximum frequency bandwidth of the optical signal Bk to w' Bk .
  • the first node can adjust the maximum frequency bandwidth of the optical signal Bk to w′ Bk , and change the first The center frequency of the optical signal is adjusted to f′ Bk .
  • Step 2105 The k-th node among the n nodes sends the thirteenth indication information to the first node.
  • the first node receives the thirteenth indication information from the k-th node among the n nodes.
  • the thirteenth indication information is used to instruct the k-th node among the n nodes to complete the adjustment of the optical signal B k .
  • the first node After receiving the thirteenth indication information, the first node ends the waiting state.
  • the first node may also adaptively adjust the receiving frequency range of the first coherent receiver according to the fifth parameter to determine that the adjusted optical signal B k can be received .
  • the first coherent receiver The frequency range of receiving the adjusted optical signal B k is (f LAk - ⁇ j) to f LAk and f LAk to (f LAk + ⁇ j),
  • the first coherent receiver The frequency range of receiving the adjusted optical signal B k is (f LAk - ⁇ k) to f LAk and f LAk to (f LAk + ⁇ k),
  • the first The coherent receiver receives the adjusted optical signal B k in the frequency range from (f LAk - ⁇ l) to f LAk and f LAk to (f LAk + ⁇ l),
  • Figure 22 shows a flow chart of another single-fiber two-way communication method provided by this application.
  • the single-fiber two-way communication method provided by this application can Including step 2201 to step 2208.
  • Step 2201 The first node sends the sixth parameter used to adjust the optical signal A k and the optical signal B k to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the sixth parameter from the first node.
  • the sixth parameter may be related to adjusting the center frequency of the optical signal Ak and adjusting the center frequency of the optical signal B k .
  • the sixth parameter may include f′ Ak and f′ Bk .
  • the sixth parameter may be a parameter related to adjusting the bandwidth of the optical signal Ak and adjusting the bandwidth of the optical signal B k .
  • the sixth parameter may include w′ Ak and w′ Bk , or ⁇ w Ak and ⁇ w Bk , or w′ Ak and ⁇ w Bk , or ⁇ w Ak and w′ Bk .
  • the sixth parameter may be a parameter related to adjusting the bandwidth of the optical signal A k and adjusting the center frequency of the optical signal B k .
  • the sixth parameter may include w′ Ak and f′ Bk , or ⁇ w Ak and f′ Bk .
  • the sixth parameter may be the same as adjusting the bandwidth of the optical signal Ak , adjusting the The center frequency of the optical signal A k , and parameters related to adjusting the center frequency of the optical signal B k .
  • the sixth parameter may include w′ Ak , f′ Ak , and f′ Bk , or ⁇ w Ak , f′ Ak , and f′ Bk .
  • the sixth parameter may be a parameter related to adjusting the bandwidth of the optical signal Bk and adjusting the center frequency of the optical signal Ak .
  • the sixth parameter may include w′ Bk and f′ Ak , or ⁇ w Bk and f′ Ak .
  • the sixth parameter may be the same as adjusting the bandwidth of the optical signal Bk , adjusting The center frequency of the optical signal B k , and parameters related to adjusting the center frequency of the optical signal A k .
  • the sixth parameter may include w′ Bk , f′ Bk , and f′ Ak , or ⁇ w Bk , f′ Bk , and f′ Ak .
  • Step 2202 The k-th node among the n nodes sends fourteenth indication information to the first node.
  • the first node receives the fourteenth indication information from the k-th node among the n nodes.
  • the fourteenth indication information is used to instruct the k-th node among the n nodes to agree to adjust the optical signal A k and the optical signal B k according to the sixth parameter.
  • the frequency range of the adjusted optical signal A k indicated by the sixth parameter does not exceed the maximum frequency range that the coherent receiver of the k-th node among the n nodes can receive, and the adjusted optical signal The frequency range of B k does not exceed n
  • the maximum frequency range that the laser modulator of the k-th node among the nodes can modulate then the k-th node among the n nodes can send the fourteenth indication information to the first node.
  • the first node After receiving the fourteenth indication information from the k-th node among the n nodes, the first node determines that the optical signal Ak and the optical signal B k can be adjusted, and then performs subsequent steps 2203 to 2208.
  • Step 2203 The first node sends the ninth indication information to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the ninth indication information from the first node.
  • the ninth instruction information is used to instruct the first node to start adjusting the optical signal Ak .
  • step 2203 reference may be made to the relevant description of step 2003, which will not be described again here.
  • Step 2204 The first node adjusts the maximum frequency bandwidth of the optical signal Ak to w′ Ak , and/or adjusts the center frequency of the optical signal Ak to f′ Ak .
  • the first node may adjust the center frequency of the optical signal Ak to f′ Ak .
  • the first node may adjust the maximum frequency bandwidth of the optical signal Ak to w′ Ak .
  • the first node can adjust the maximum frequency bandwidth of the optical signal Ak to w′ Ak , and change the The center frequency of an optical signal is adjusted to f′ Ak .
  • Step 2205 The first node sends the tenth indication information to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the tenth indication information from the first node.
  • the tenth indication information is used to instruct the first node to complete the adjustment of the optical signal Ak .
  • step 2205 reference may be made to the relevant description of step 2005, which will not be described again here.
  • Step 2206 The first node sends the twelfth indication information to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the twelfth indication information from the first node.
  • the twelfth instruction information is used to instruct the k-th node among the n nodes to start adjusting the optical signal B k .
  • step 2206 reference may be made to the relevant description of step 2003, which will not be described again here.
  • Step 2207 The k-th node among the n nodes adjusts the maximum frequency bandwidth of the optical signal B k to w′ Bk , and/or adjusts the center frequency of the optical signal B k to f′ Bk .
  • the k-th node among the n nodes can adjust the center frequency of the optical signal Bk to f' Bk .
  • the k-th node among the n nodes can adjust the maximum frequency bandwidth of the optical signal B k to w' Bk .
  • the k-th node among the n nodes can adjust the maximum frequency bandwidth of the optical signal Bk to w ′ Bk , and adjust the center frequency of the first optical signal to f′ Bk .
  • Step 2208 The k-th node among the n nodes sends the thirteenth indication information to the first node.
  • the first node receives the thirteenth indication information from the k-th node among the n nodes.
  • the thirteenth indication information is used to instruct the k-th node among the n nodes to complete the adjustment of the optical signal B k .
  • step 2208 reference may be made to the relevant description of step 2005, which will not be described again here.
  • Figure 23 shows a flow chart of another single-fiber two-way communication method provided by this application.
  • the single-fiber two-way communication method provided by this application can Including step 2301 to step 2308.
  • Step 2301 The first node sends the sixth parameter used to adjust the optical signal Ak and the optical signal B k to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the sixth parameter from the first node.
  • step 1231 reference may be made to the relevant description of step 1101, which will not be described again here.
  • Step 2302 The k-th node among the n nodes sends the fourteenth indication information to the first node.
  • the first node receives the fourteenth indication information from the k-th node among the n nodes.
  • the fourteenth indication information is used to instruct the k-th node among the n nodes to agree to adjust the optical signal A k and the optical signal B k according to the sixth parameter.
  • step 2302 reference may be made to the relevant description of step 2202, which will not be described again here.
  • Step 2303 The first node sends the twelfth indication information to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the twelfth indication information from the first node.
  • the twelfth instruction information is used to instruct the k-th node among the n nodes to start adjusting the optical signal B k .
  • step 1233 reference may be made to the relevant description of step 2206, which will not be described again here.
  • Step 2304 The k-th node among the n nodes adjusts the maximum frequency bandwidth of the optical signal B k to w′ Bk , and/or adjusts the center frequency of the optical signal B k to f′ Bk .
  • step 2304 reference may be made to the relevant description of step 2207, which will not be described again here.
  • Step 2305 The k-th node among the n nodes sends the thirteenth indication information to the first node.
  • the first node receives the thirteenth indication information from the k-th node among the n nodes.
  • the thirteenth indication information is used to instruct the k-th node among the n nodes to complete the adjustment of the optical signal B k .
  • step 2305 reference may be made to the relevant description of step 2208, which will not be described again here.
  • Step 2306 The first node sends the ninth indication information to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the ninth indication information from the first node.
  • the ninth instruction information is used to instruct the first node to start adjusting the optical signal Ak .
  • step 2306 reference may be made to the relevant description of step 2203, which will not be described again here.
  • Step 2307 The first node adjusts the maximum frequency bandwidth of the optical signal Ak to w′ Ak , and/or adjusts the center frequency of the optical signal Ak to f′ Ak .
  • step 2307 reference may be made to the relevant description of step 2204, which will not be described again here.
  • Step 2308 The first node sends the tenth indication information to the k-th node among the n nodes.
  • the k-th node among the n nodes receives the tenth indication information from the first node.
  • the tenth indication information is used to instruct the first node to complete the adjustment of the optical signal Ak .
  • step 2308 reference may be made to the relevant description of step 2205, which will not be described again here.
  • the first node can communicate with n nodes, other frequency ranges adjacent to the frequency ranges of the optical signal A k and the optical signal B k may be used by optical signals of other nodes among the n nodes. Therefore, if you want to adjust the optical signal A k and/or the optical signal B k , you also need to consider the optical signals of other nodes among the n nodes.
  • the first node does not need to interact with other nodes among the n nodes, Directly execute the method corresponding to any of the embodiments in FIG. 20 to FIG. 22 .
  • the adjusted optical signal A k and/or the optical signal B k will affect the optical signals of other nodes among the n nodes (for example, the adjusted optical signal A k and/or the optical signal B k If the frequency range overlaps too much with the frequency range of the optical signals of other nodes among the n nodes, causing interference), then the center frequencies of the optical signals of other nodes among the n nodes need to be adjusted.
  • the first node may also adjust the center frequency of the optical signal Ax and/or the optical signal Bx .
  • x is a positive integer from 1 to n, and x is not equal to k.
  • the process of adjusting the center frequency of the optical signal A x and/or the optical signal B Steps of any embodiment in Figure 20 to Figure 23.
  • the center frequency of the adjusted optical signal A x and/or the optical signal B x is determined by the first node.
  • step 2003 before step 2003, step 2103, step 2203 or step 2303, the method embodiment corresponding to Fig. 20, Fig. 21, Fig. 22 or Fig. 23 may also include step 2401 and step 2402.
  • Step 2401. The first node sends a seventh parameter for adjusting the optical signal A x and/or the optical signal B x to the node x among the n nodes.
  • the seventh parameter includes the center frequency of the adjusted optical signal A x . f′ Ax and/or the center frequency f′ Bx of the adjusted optical signal B x .
  • Step 2402 The first node receives the fifteenth indication information from the node x among the n nodes.
  • the fifteenth indication information is used to indicate that the node x among the n nodes agrees to adjust the optical signal A x and/or The optical signal B x is adjusted.
  • the first node can also perform signaling interaction with node x among the n nodes to realize the adjustment of the optical signal A x and/or the optical signal B x .
  • This process is related to the optical signal A k and/or Or the adjustment process of the optical signal B k is the same and will not be described again here.
  • modulating the bandwidth of the optical signal Ak may be to increase the bandwidth of the optical signal Ak , or to reduce the bandwidth of the optical signal Ak .
  • Modulating the bandwidth of the optical signal B k may be to increase the bandwidth of the optical signal B k , or it may be to decrease the bandwidth of the optical signal B k .
  • Increasing the bandwidth of an optical signal can be understood as expanding the communication bandwidth.
  • the method in the embodiment corresponding to FIG. 20 to FIG. 23 can be used to expand the bandwidth of point-to-multipoint single-fiber bidirectional communication.
  • Figure 24 shows a schematic diagram of expanding the optical signal A k .
  • the spatial frequency between the optical signal B 2 and the optical signal A 3 adjacent to the optical signal A 2 to be adjusted The range is larger than the bandwidth w′ A2 of the optical signal A 2 to be expanded.
  • the center frequency of the optical signal A 2 can be adjusted from f A2 to f' A2 so that the idle frequency range on both sides of f' A2 is greater than Afterwards, the bandwidth of the optical signal A 2 can be expanded from w A2 to w' A2 .
  • the center frequency of the optical signal is adjusted so that the idle frequency range between adjacent optical signals is not less than the bandwidth of the optical signal A k to be expanded. Moreover, when adjusting the center frequencies of adjacent optical signals, if other optical signals are affected, the center frequencies of all affected optical signals will be adjusted uniformly.
  • optical signal A k when it is necessary to adjust the center frequencies of optical signals adjacent to the optical signal A k , you can Only the optical signal on one side of the optical signal A k is adjusted, or the optical signals on both sides of the optical signal A k can be adjusted simultaneously, which is not limited in this application.
  • Figure 25 shows another schematic diagram of expanding the optical signal A k .
  • the frequency range of the multiple optical signals is continuous in the frequency domain and is consistent with the optical signal A 2 to be adjusted.
  • the idle frequency range between the adjacent optical signal B 2 and the optical signal A 3 is smaller than the bandwidth w′ A2 of the optical signal A 2 to be expanded.
  • the center frequencies of the optical signal B 1 , the optical signal A 1 , and the optical signal B 2 can be adjusted so that the idle frequency range between the adjusted optical signal B 2 and the optical signal B 3 is not less than that of the optical signal B 1 , the optical signal A 1 , and the optical signal B 2 .
  • Signal A 2 will have an expanded bandwidth.
  • the capacity expansion method of the optical signal B k is similar to the capacity expansion method of the optical signal Ak , and will not be described again here.
  • the methods and/or steps implemented by the first node can also be implemented by components (such as chips or circuits) available for the first node
  • the methods and/or steps implemented by the second node can also be implemented by components (such as chips or circuits) available for the first node. or steps, may also be implemented by components (such as chips or circuits) available for the second node.
  • 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 node in the above method embodiment, or a device including the above first node, or a component usable for the first node.
  • the communication device may also be the second node in the above method embodiment, or a device including the above second node, or a component usable for the second node.
  • 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.
  • Figure 26 shows a schematic structural diagram of a communication device provided by this application.
  • the communication device 260 can include the above-mentioned optical module 50.
  • the structure of the optical module 50 can be as shown in Figure 5, which will not be described again here.
  • the communication device 260 may also include a processing module 60.
  • the laser modulator 503 may be used to send a first optical signal to the second node.
  • the first optical signal is obtained by modulating the laser light emitted by the laser 501.
  • the coherent receiver 504 can be used to receive the second optical signal from the second node, and the laser 501 is used to generate the local oscillator light required by the coherent receiver 504.
  • the center frequency of the first optical signal is f 1
  • the center frequency of the second optical signal is f 2
  • f 1 is different from f 2
  • the laser modulator 503 can also be used to send the first parameter for adjusting the first optical signal to the second node.
  • the coherent receiver 504 may also be configured to receive first indication information from the second node, where the first indication information is used to instruct the second node to agree to adjust the first optical signal according to the first parameter.
  • the laser modulator 503 may also be used to send second instruction information to the second node.
  • the second instruction information is used to instruct the first node to start adjusting the first optical signal.
  • the processing module 60 may be used to adjust the maximum frequency bandwidth of the first optical signal to w′ 1 , and/or adjust the center value of the first optical signal to w′ 1 .
  • the heart frequency is adjusted to f′ 1 .
  • the laser modulator 503 may be used to send third indication information to the second node, and the third indication information is used to indicate that the first node has completed the adjustment of the first optical signal.
  • the laser modulator 503 can also be used to send the second parameter for adjusting the second optical signal to the second node.
  • the coherent receiver 504 may also be configured to receive fourth indication information from the second node. The fourth indication information is used to instruct the second node to agree to adjust the second optical signal according to the second parameter.
  • the laser modulator 503 may also be used to send fifth instruction information to the second node. The fifth instruction information is used to instruct the second node to start adjusting the second optical signal.
  • the coherent receiver 504 may also be configured to receive sixth indication information from the second node. The sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the laser modulator 503 may also be used to send a third parameter for adjusting the first optical signal and the second optical signal to the second node.
  • the coherent receiver 504 may also be configured to receive seventh indication information from the second node. The seventh indication information is used to instruct the second node to agree to adjust the first optical signal and the second optical signal according to the third parameter.
  • the laser modulator 503 may also be used to send second instruction information to the second node. The second instruction information is used to instruct the first node to start adjusting the first optical signal.
  • the processing module 60 may also be used to adjust the maximum frequency bandwidth of the first optical signal to w′ 1 and/or adjust the center frequency of the first optical signal to f′ 1 .
  • the laser modulator 503 may also send third indication information to the second node, where the third indication information is used to instruct the first node to complete the adjustment of the first optical signal.
  • the laser modulator 503 may also send fifth instruction information to the second node, where the fifth instruction information is used to instruct the second node to start adjusting the second optical signal.
  • the coherent receiver 504 may also be configured to receive sixth indication information from the second node, where the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the laser modulator 503 may also be used to send a third parameter for adjusting the first optical signal and the second optical signal to the second node.
  • the coherent receiver 504 may also be configured to receive seventh indication information from the second node. The seventh indication information is used to instruct the second node to agree to adjust the first optical signal and the second optical signal according to the third parameter.
  • the laser modulator 503 may also be used to send fifth instruction information to the second node. The fifth instruction information is used to instruct the second node to start adjusting the second optical signal.
  • the coherent receiver 504 may also be configured to receive sixth indication information from the second node, where the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the laser modulator 503 may also be used to send second instruction information to the second node.
  • the second instruction information is used to instruct the first node to start adjusting the first optical signal.
  • the processing module 60 may also be used to adjust the maximum frequency bandwidth of the first optical signal to w′ 1 and/or adjust the center frequency of the first optical signal to f′ 1 .
  • the laser modulator 503 may also be used to send third indication information to the second node. The third indication information is used to instruct the first node to complete the adjustment of the first optical signal.
  • the laser modulator 503 may be used to send a second optical signal to the first node through the first laser modulator.
  • the second optical signal is obtained by modulating the laser light emitted by the second laser.
  • the processing module 60 may be used to receive the first optical signal from the first node through the second coherent receiver, and the second laser is used to generate the local oscillator light required by the second coherent receiver.
  • the center frequency of the first optical signal is f 1
  • the center frequency of the second optical signal is f 2
  • f 1 is different from f 2
  • the coherent receiver 504 may also be used to receive the first parameter from the first node for adjusting the first optical signal. Then, the laser modulator 503 may also be used to send first indication information to the first node, where the first indication information is used to instruct the second node to agree to adjust the first optical signal according to the first parameter. Coherent receiver 504, okay Used to receive second indication information from the first node, and the second indication information is used to instruct the first node to start adjusting the first optical signal. The laser modulator 503 may be used to receive third indication information from the first node, and the third indication information is used to indicate that the first node has completed the adjustment of the first optical signal.
  • the coherent receiver 504 may also be used to receive the second parameter from the first node for adjusting the second optical signal.
  • the laser modulator 503 may also be used to send fourth indication information to the first node.
  • the fourth indication information is used to instruct the second node to agree to adjust the second optical signal according to the second parameter.
  • the coherent receiver 504 may also be configured to receive fifth indication information from the first node, where the fifth indication information is used to instruct the second node to start adjusting the second optical signal.
  • the processing module 60 may also be used to adjust the maximum frequency bandwidth of the second optical signal to w′ 2 and/or adjust the center frequency of the second optical signal to f′ 2 .
  • the laser modulator 503 may also be used to send sixth instruction information to the second node. The sixth instruction information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the coherent receiver 504 may also be configured to receive a third parameter from the first node direction for adjusting the first optical signal and the second optical signal.
  • the laser modulator 503 may also be used to send seventh indication information to the first node.
  • the seventh indication information is used to instruct the second node to agree to adjust the first optical signal and the second optical signal according to the third parameter.
  • the coherent receiver 504 may also be configured to receive second indication information sent from the first node, where the second indication information is used to instruct the first node to start adjusting the first optical signal.
  • the coherent receiver 504 may also be configured to receive third indication information from the first node, where the third indication information is used to instruct the first node to complete the adjustment of the first optical signal.
  • the laser modulator 503 may also be used to send fifth instruction information to the second node.
  • the fifth instruction information is used to instruct the second node to start adjusting the second optical signal.
  • the processing module 60 may also be used to adjust the maximum frequency bandwidth of the second optical signal to w′ 2 and/or adjust the center frequency of the second optical signal to f′ 2 .
  • the laser modulator 503 may also be used to send sixth instruction information to the first node, and the sixth instruction information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the coherent receiver 504 may also be configured to receive a third parameter from the first node direction for adjusting the first optical signal and the second optical signal.
  • the laser modulator 503 may also be used to send seventh indication information to the first node.
  • the seventh indication information is used to instruct the second node to agree to adjust the first optical signal and the second optical signal according to the third parameter.
  • the coherent receiver 504 may also be configured to receive fifth indication information from the first node, where the fifth indication information is used to instruct the second node to start adjusting the second optical signal.
  • the processing module 60 may also be used to adjust the maximum frequency bandwidth of the second optical signal to w′ 2 and/or adjust the center frequency of the second optical signal to f′ 2 .
  • the second node may send sixth indication information to the first node, and the sixth indication information is used to instruct the second node to complete the adjustment of the second optical signal.
  • the coherent receiver 504 may also be configured to receive second indication information sent from the first node, where the second indication information is used to instruct the first node to start adjusting the first optical signal.
  • the coherent receiver 504 may also be configured to receive third indication information from the first node, where the third indication information is used to instruct the first node to complete the adjustment of the first optical signal.
  • Figure 27 shows another communication device provided by this application.
  • the communication device 270 can include a processor 2701, a bus 2702 and an optical module 50.
  • the structure of the optical module 50 can be shown in FIG. 5 , which will not be described again here.
  • the processor 2701 can communicate with the optical module 50 through the bus 2702 .
  • the processor 2701 can send signaling to the optical module 50 through the bus 2702 to configure relevant parameters of the modulator 503 and the coherent receiver 504 in the optical module 50 .
  • the bus 2702 can be divided into an address bus, a data bus, a control bus, etc.
  • the communication device 270 may also include a memory 2703, which may be used to store signaling and/or data.
  • the memory 2703 can store parameters used to configure the optical module, messages that need to be sent through the optical module or messages received by the optical module, etc.
  • the communication device 270 may also include a communication interface 2704, which may be used for digital communication between the communication device 270 and other communication devices.
  • the communication interface 2704 can be implemented through an interface circuit.
  • the processor in this application can be a central processing unit (CPU), other general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (application-specific integrated circuit). , ASIC), or programmable logic device (PLD), etc.
  • the general processor can be a microprocessor or any conventional processor.
  • PLD can be a complex programmable logical device (CPLD), a field programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.
  • 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.
  • “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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Abstract

提供了一种单纤双向通信方法、通信装置及系统,涉及光通信技术领域。第一节点可以通过第一激光器实现发送第一光信号和接收第二光信号的功能,第二节点可以通过第二激光器实现发送第二光信号和接收第一光信号的功能。基于该方法,第一节点和第二节点均只需使用一个激光器就可以实现单纤双向通信,从而可以有效降低光通信的成本,并且可以降低光模块的体积。

Description

单纤双向通信方法、通信装置及系统
本申请要求于2022年7月28日提交中国国家知识产权局、申请号为202210901631.5、申请名称为“单纤双向通信方法、通信装置及系统”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及光通信技术领域,尤其涉及一种单纤双向通信方法、通信装置及系统。
背景技术
光纤通信系统中的绝大多数通信为双向通信,通信的双方能够同时进行发送与接收。目前,在光纤通信系统中,双向通信可以基于单纤实现也可以基于双纤实现。如果双向通信基于双纤实现,那么双向通信的收发信号可以承载在不同的光纤上。如果双向通信基于单纤实现,那么双向通信的收发信号可以承载在一根光纤的不同波长上。
相比于双纤通信的实现方式,单纤双向通信可以只使用一根光纤就能完成原来两根光纤才能完成的工作,可以节省光纤资源。
不过,在单纤双向通信系统中,通信双方的光模块都需要收发处理不同波长的信号,因此需要使用两个不同波长的激光器,增加了光模块的体积和成本。
发明内容
本申请提供了一种单纤双向通信方法、通信装置及系统,用于解决单纤双向通信系统中需要使用不同的激光器来收发不同波长的信号,导致光模块的体积和成本无法降低的问题。
为达到上述目的,本申请采用如下技术方案:
第一方面,本申请提供了一种单纤双向通信方法,该单纤双向通信方法可以应用于第一节点,第一节点包括第一光模块,第一光模块可以包括第一激光器,第一连接单元,第一相干接收机、第一激光调制器和第二连接单元。其中,第一激光器通过第一连接单元分别与第一激光调制器和第一相干接收机连接,第一相干接收机和第一激光调制器通过第二连接单元与同一根光纤连接。该单纤双向通信方法可以包括:第一节点通过第一激光调制器向第二节点发送第一光信号,第一光信号是对第一激光器发射的激光进行调制后得到的。以及,第一节点通过第一相干接收机接收来自第二节点的第二光信号,第一激光器用于产生第一相干接收机所需的本振光。其中,第一光信号的中心频率为f1,第二光信号的中心频率为f2,f1与f2不同,|f1-f2|小于第一阈值。在该方案中,第一节点和第二节点均只需使用一个激光器,该方案可以有效降低光通信的成本,并可以降低光模块的体积。
结合上述第一方面,作为一种可能的实现方式,第一光信号的频率范围与第二光信号的频率范围不重复或部分重复。
结合上述第一方面,作为一种可能的实现方式,w1为第一光信号的最大频带宽度,w2为第二光信号的最大频带宽度。
结合上述第一方面,作为一种可能的实现方式,若第一激光器的输出频率为f3,则或者,其中,w1为第一光信号的最大频带宽度,w2为第二光信号的最大频带宽度。
结合上述第一方面,作为一种可能的实现方式,第一激光器的输出频率为f3,f3=f1
结合上述第一方面,作为一种可能的实现方式,若第一激光器的输出频率为f3,则第一相干接收机接收第二光信号的频率范围为(f3-Δx)至f3和f3至(f3+Δx),w2为第二信号的最大频带宽度。
结合上述第一方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:第一节点可以向第二节点发送用于对第一光信号进行调整的第一参数。然后,第一节点可以接收来自第二节点的第一指示信息,第一指示信息用于指示第二节点同意根据第一参数对第一光信号进行调整。之后,第一节点可以向第二节点发送第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。并且,第一节点将第一光信号的最大频带宽度调整为w′1,和/或,将第一光信号的中心频率调整为f′1。进一步地,第一节点可以向第二节点发送第三指示信息,第三指示信息用于指示第一节点完成了对第一光信号的调整。
结合上述第一方面,作为一种可能的实现方式,第一参数包括w′1和/或f′1,或者,Δw1和/或f′1。其中,Δw1=w′1-w1
结合上述第一方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:首先,第一节点可以向第二节点发送用于对第二光信号进行调整的第二参数。然后,第一节点接收来自第二节点的第四指示信息,第四指示信息用于指示第二节点同意根据第二参数对第二光信号进行调整。之后,第一节点可以向第二节点发送第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。进一步地,第一节点可以接收来自第二节点的第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。
结合上述第一方面,作为一种可能的实现方式,第一参数包括w′2和/或f′2,或者,Δw2和/或f′2。其中,Δw2=w′2-w2
结合上述第一方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:首先,第一节点向第二节点发送用于对第一光信号和第二光信号进行调整的第三参数。之后,第一节点接收来自第二节点的第七指示信息,第七指示信息用于指示第二节点同意根据第三参数对第一光信号和第二光信号进行调整。第一节点向第二节点发送第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。第一节点将第一光信号的最大频带宽度调整为w′1,和/或,将第一光信号的中心频率调整为f′1。第一节点向第二节点发送第三指示信息,第三指示信息用于指示第一节点完成对第一光信号的调整。第一节点向第二节点发送第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。第一节点接收来第二节点的第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。
结合上述第一方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:第一节点向第二节点发送用于对第一光信号和第二光信号进行调整的第三参数。第一节点接收来自第二节点的第七指示信息,第七指示信息用于指示第二节点同意根据第三参数对第一光信号和第二光信号进行调整。第一节点向第二节点发送第五指示信息,第五指示信息用于指示 第二节点开始对第二光信号进行调整。第一节点接收来第二节点的第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。第一节点向第二节点发送第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。第一节点将第一光信号的最大频带宽度调整为w′1,和/或,将第一光信号的中心频率调整为f′1。第一节点向第二节点发送第三指示信息,第三指示信息用于指示第一节点完成对第一光信号的调整。
结合上述第一方面,作为一种可能的实现方式,第三参数包括f′1、w′1或Δw1中的至少一项,以及f′2、w′2或Δw2中的至少一项。其中,Δw1=w′1-w1,Δw2=w′2-w2
结合上述第一方面,作为一种可能的实现方式,第一节点通过第一光模块与n个节点进行通信,n≥2。在第二节点为n个节点中的第k个节点的情况下,f1=fAk,f2=fBk;其中,fAk为第一节点向n个节点中的第k个节点发送的光信号Ak的中心频率,fBk为第k个节点向第一节点发送的光信号Bk的中心频率,k为1至n的正整数。
结合上述第一方面,作为一种可能的实现方式,在k>1的情况下,fAk>fA(k-1),fAk>fB(k-1),fBk>fA(k-1),fBk>fB(k-1)。以及,若k为奇数,fAk<fBk,若k为偶数,fBk<fAk;或者,若k为奇数,fBk<fAk,若k为偶数,fAk<fBk
结合上述第一方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:第一节点向n个节点中的第k个节点发送用于对光信号Ak进行调整的第四参数。第一节点接收来自n个节点中的第k个节点的第八指示信息,第八指示信息用于指示n个节点中的第k个节点同意根据第四参数对光信号Ak进行调整。第一节点向n个节点中的第k个节点发送第九指示信息,第九指示信息用于指示第一节点开始对光信号Ak进行调整。第一节点将光信号Ak的最大频带宽度调整为w′Ak,和/或,将光信号Ak的中心频率调整为f′Ak。第一节点向n个节点中的第k个节点发送第十指示信息,第十指示信息用于指示第一节点完成对光信号Ak的调整。
结合上述第一方面,作为一种可能的实现方式,第四参数包括w′Ak和/或f′Ak,或者,ΔwAk和/或f′Ak;其中,ΔwAk=w′Ak-wAk
结合上述第一方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:第一节点向n个节点中的第k个节点发送用于对光信号Bk进行调整的第五参数。第一节点接收来自n个节点中的第k个节点的第十一指示信息,第十一指示信息用于指示n个节点中的第k个节点同意根据第五参数对光信号Bk进行调整。第一节点向n个节点中的第k个节点发送第十二指示信息,十二指示信息用于指示n个节点中的第k个节点开始对光信号Bk进行调整。第一节点接收来自n个节点中的第k个节点的第十三指示信息,第十三指示信息用于指示n个节点中的第k个节点完成对光信号Bk的调整。
结合上述第一方面,作为一种可能的实现方式,第五参数包括w′Bk和/或f′Bk,或者,ΔwBk和/或f′Bk;其中,ΔwBk=w′Bk-wBk
结合上述第一方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:第一节点向n个节点中的第k个节点发送用于对光信号Ak和光信号Bk进行调整的第六参数。第一节点接收来自n个节点中的第k个节点的第十四指示信息,第十四指示信息用于指示n个节点中的第k个节点同意根据第六参数对光信号Ak和光信号Bk进行调整。第一节点向n个节点中的第k个节点发送第九指示信息示,第九指示信息用于指示第一节点开始对光信号Ak进行 调整。第一节点将光信号Ak的最大频带宽度调整为w′Ak,和/或,将光信号Ak的中心频率调整为f′Ak。第一节点向n个节点中的第k个节点发送第十指示信息,第十指示信息用于指示第一节点完成对光信号Ak的调整。第一节点向n个节点中的第k个节点发送第十二指示信息,第十二指示信息用于指示n个节点中的第k个节点开始对光信号Bk进行调整。第一节点接收来n个节点中的第k个节点的第十三指示信息,第十三指示信息用于指示n个节点中的第k个节点完成对光信号Bk的调整。
结合上述第一方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:第一节点向n个节点中的第k个节点发送用于对光信号Ak和光信号Bk进行调整的第六参数。第一节点接收来自n个节点中的第k个节点的第十四指示信息,第十四指示信息用于指示n个节点中的第k个节点同意根据第六参数对光信号Ak和光信号Bk进行调整。第一节点向n个节点中的第k个节点发送第十二指示信息,第十二指示信息用于指示n个节点中的第k个节点开始对光信号Bk进行调整。第一节点接收来n个节点中的第k个节点的第十三指示信息,第十三指示信息用于指示n个节点中的第k个节点完成对光信号Bk的调整。第一节点向n个节点中的第k个节点发送第九指示信息,第九指示信息用于指示第一节点开始对光信号Ak进行调整。第一节点将光信号Ak的最大频带宽度调整为w′Ak,和/或,将光信号Ak的中心频率调整为f′Ak。第一节点向n个节点中的第k个节点发送第十指示信息,第十指示信息用于指示第一节点完成对光信号Ak的调整。
结合上述第一方面,作为一种可能的实现方式,第六参数包括f′Ak、w′Ak或ΔwAk中的至少一项,以及f′Bk、w′Bk或ΔwBk中的至少一项。其中,ΔwAk=w′Ak-wAk,ΔwBk=w′Bk-wBk
结合上述第一方面,作为一种可能的实现方式,在第一节点向n个节点中的第k个节点发送第九指示信息之前,该单纤双向通信方法还可以包括:第一节点向n个节点中的节点x发送用于对光信号Ax和/或光信号Bx进行调整的第七参数,第七参数包括调整后的光信号A的中心频率f′Ax和/或调整后的光信号Bx的中心频率f′Bx。第一节点接收来自n个节点中的节点x的第十五指示信息,第十五指示信息用于指示n个节点中的节点x同意根据第七参数对光信号Ax和/或光信号Bx进行调整。其中,x为1至n的正整数,x不等于k。
结合上述第一方面,作为一种可能的实现方式,在第一节点向n个节点中的第k个节点发送第十二指示信息之前,该单纤双向通信方法还可以包括:第一节点向n个节点中的节点x发送用于对光信号Ax和/或光信号Bx进行调整的第七参数,第七参数包括调整后的光信号A的中心频率f′Ax和/或调整后的光信号Bx的中心频率f′Bx。第一节点接收来自n个节点中的节点x的第十五指示信息,第十五指示信息用于指示n个节点中的节点x同意根据第七参数对光信号Ax和/或光信号Bx进行调整。其中,x为1至n的正整数,x不等于k。
第二方面,本申请提供了一种单纤双向通信方法,该单纤双向通信方法可以应用于第二节点,第二节点可以包括第二光模块,第二光模块包括第二激光器,第三连接单元,第二相干接收机、第二激光调制器和第四连接单元。其中,第二激光器通过第三连接单元分别与第二激光调制器和第二相干接收机连接,第二相干接收机和第二激光调制器通过第四连接单元与同一根光纤连接。该单纤双向通信方法可以包括:第二节点通过第一激光调制器向第一节点发送第二光信号,第二光信号是对第二激光器发射的激光进行调制后得到的。第二节点通 过第二相干接收机接收来自第一节点的第一光信号,第二激光器用于产生第二相干接收机所需的本振光。其中,第一光信号的中心频率为f1,第二光信号的中心频率为f2,f1与f2不同,|f1-f2|小于第一阈值。
结合上述第二方面,作为一种可能的实现方式,若第二激光器的输出频率为f4,则或者,其中,w1为第一光信号的最大频带宽度,w2为第二光信号的最大频带宽度。
结合上述第二方面,作为一种可能的实现方式,第一激光器的输出频率为f4,f4=f2
结合上述第二方面,作为一种可能的实现方式,若第一激光器的输出频率为f3,第一相干接收机接收第二光信号的频率范围为(f4-Δy)至f4和f4至(f4+Δy),w1为第一信号的最大频带宽度。
结合上述第二方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:第二节点接收来自第一节点的用于对第一光信号进行调整的第一参数。然后,第二节点可以向第一节点发送第一指示信息,第一指示信息用于指示第二节点同意根据第一参数对第一光信号进行调整。之后,第二节点可以接收来自第一节点的第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。另外,第二节点可以接收来自第一节点的第三指示信息,第三指示信息用于指示第一节点完成了对第一光信号的调整。
结合上述第二方面,作为一种可能的实现方式,第一参数包括w′1和/或f′1,或者,Δw1和/或f′1。其中,Δw1=w′1-w1
结合上述第二方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:首先,第二节点可以接收来自第一节点的用于对第二光信号进行调整的第二参数。然后,第二节点可以向第一节点发送第四指示信息,第四指示信息用于指示第二节点同意根据第二参数对第二光信号进行调整。之后,第二节点可以接收来自第一节点的第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。进而,第二节点可以将第二光信号的最大频带宽度调整为w′2,和/或,将第二光信号的中心频率调整为f′2。最后,第二节点可以向第二节点发送第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。
结合上述第二方面,作为一种可能的实现方式,第一参数包括w′2和/或f′2,或者,Δw2和/或f′2。其中,Δw2=w′2-w2
结合上述第二方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:首先,第二节点可以接收来自第一节点向的用于对第一光信号和第二光信号进行调整的第三参数。然后,第二节点可以向第一节点发送第七指示信息,第七指示信息用于指示第二节点同意根据第三参数对第一光信号和第二光信号进行调整。之后,第二节点可以接收来自第一节点发送第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。以及,第二节点可以接收来自第一节点的第三指示信息,第三指示信息用于指示第一节点完成对第一光信号的调整。进一步地,第一节点可以向第二节点发送第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。并且,第二节点可以将第二光信号的最大频带宽度调整为w′2,和/或,将第二光信号的中心频率调整为f′2。最后,第二节点可以向第一节点发送第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。
结合上述第二方面,作为一种可能的实现方式,该单纤双向通信方法还可以包括:首先,第二节点可以接收来自第一节点向的用于对第一光信号和第二光信号进行调整的第三参数。然后,第二节点可以向第一节点发送第七指示信息,第七指示信息用于指示第二节点同意根据第三参数对第一光信号和第二光信号进行调整。之后,第二节点还可以接收来自第一节点的第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。并且,第二节点可以将第二光信号的最大频带宽度调整为w′2,和/或,将第二光信号的中心频率调整为f′2。另外,第二节点可以向第一节点发送第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。进一步地,第二节点可以接收来自第一节点发送第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。以及,第二节点可以接收来自第一节点的第三指示信息,第三指示信息用于指示第一节点完成对第一光信号的调整。
结合上述第二方面,作为一种可能的实现方式,第三参数包括f′1、w′1或Δw1中的至少一项,以及f′2、w′2或Δw2中的至少一项。其中,Δw1=w′1-w1,Δw2=w′2-w2
结合上述第二方面,作为一种可能的实现方式,第一节点通过第一光模块与n个节点进行通信,n≥2。在第二节点为n个节点中的第k个节点的情况下,f1=fAk,f2=fBk;其中,fAk为第一节点向n个节点中的第k个节点发送的光信号Ak的中心频率,fBk为第k个节点向第一节点发送的光信号Bk的中心频率。
结合上述第二方面,作为一种可能的实现方式,在k>1的情况下,fAk>fA(k-1),fAk>fB(k-1),fBk>fA(k-1),fBk>fB(k-1)。以及,若k为奇数,fAk<fBk,若k为偶数,fBk<fAk;或者,若k为奇数,fBk<fAk,若k为偶数,fAk<fBk
第三方面,提供了一种第一节点,该第一节点可以包括第一光模块,第一光模块可以包括第一激光器,第一连接单元,第一相干接收机、第一激光调制器和第二连接单元。其中,第一激光器通过第一连接单元分别与第一激光调制器和第一相干接收机连接,第一相干接收机和第一激光调制器通过第二连接单元与同一根光纤连接。
第四方面,提供了一种第二节点,该第二节点可以包括第二光模块,第二光模块可以包括第二激光器,第三连接单元,第二相干接收机、第二激光调制器和第四连接单元。其中,第二激光器通过第三连接单元分别与第二激光调制器和第二相干接收机连接,第二相干接收机和第二激光调制器通过第四连接单元与同一根光纤连接。
第五方面,提供一种通信系统,该通信系统包括执行上述第一方面所述的单纤双向通信方法的第一节点,以及执行上述第二方面所述的单纤双向通信方法的第二节点。
第六方面,提供了一种通信装置,该通信装置可以包括处理器和第一光模块。该处理器可以控制第一光模块执行如上述第一方面中任一实现方式所述的方法。
结合上述第六方面,作为一种可能的实现方式,该处理器可以与存储器耦合,存储器中可以存储计算机指令,处理器可以在读取存储器中存储的计算机指令之后,控制第一光模块执行如上述第一方面中任一实现方式所述的方法。可选地,存储器中还可以存储第一光模块所要发送的数据和/或第一光模块接收到的数据。
结合上述第六方面,作为一种可能的实现方式,通信装置还可以包括通信接口,该通信接口可以用于该通信装置与其他通信装置进行数字通信。作为一种实现方式,该通信接口可通过接口电路来实现。
第七方面,提供了一种通信装置,该通信装置可以包括处理器和第二光模块。该处理器可以控制第二光模块执行如上述第二方面中任一实现方式所述的方法。
结合上述第七方面,作为一种可能的实现方式,该处理器可以与存储器耦合,存储器中可以存储计算机指令,处理器可以在读取存储器中存储的计算机指令之后,控制第二光模块执行如上述第二方面中任一实现方式所述的方法。可选地,存储器中还可以存储第二光模块所要发送的数据和/或第二光模块接收到的数据。
结合上述第七方面,作为一种可能的实现方式,通信装置还可以包括通信接口,该通信接口可以用于该通信装置与其他通信装置进行数字通信。作为一种实现方式,该通信接口可通过接口电路来实现。
第八方面,提供了一种计算机可读存储介质,该计算机可读存储介质中存储有指令,当其在计算机上运行时,使得计算机可以执行上述任一方面或第二方面任一实现方式所述的方法。
其中,第三方面至第八方面中任一种设计方式所带来的技术效果可参见第一方面或第二方面中不同设计方式所带来的技术效果,此处不再赘述。
附图说明
图1为本申请实施例提供的一种基于双纤双向通信的点到点通信系统的示意图;
图2为本申请实施例提供的一种基于双纤双向通信的点到多点通信系统的示意图;
图3为本申请实施例提供的一种基于单纤双向通信的点到点通信系统的示意图;
图4为本申请实施例提供的一种基于单纤双向通信的点到多点通信系统的示意图;
图5为本申请实施例提供的一种光模块的结构示意图;
图6为本申请实施例提供的一种单纤双向通信方法的流程图;
图7为本申请实施例提供的一种第一光信号和第二光信号的示意图;
图8为本申请实施例提供的另一种第一光信号和第二光信号的示意图;
图9为本申请实施例提供的另一种单纤双向通信方法的流程图;
图10为本申请实施例提供的又一种单纤双向通信方法的流程图;
图11为本申请实施例提供的又一种单纤双向通信方法的流程图;
图12为本申请实施例提供的又一种单纤双向通信方法的流程图;
图13为本申请实施例提供的一种对第一光信号进行扩容的示意图;
图14为本申请实施例提供的另一种对第一光信号进行扩容的示意图;
图15为本申请实施例提供的又一种对第一光信号进行扩容的示意图;
图16为本申请实施例提供的一种第一节点与n个节点之间传输的光信号的示意图;
图17为本申请实施例提供的另一种第一节点与n个节点之间传输的光信号的示意图;
图18为本申请实施例提供的又一种第一节点与n个节点之间传输的光信号的示意图;
图19为本申请实施例提供的又一种第一节点与n个节点之间传输的光信号的示意图;
图20为本申请实施例提供的又一种单纤双向通信方法的流程图;
图21为本申请实施例提供的又一种单纤双向通信方法的流程图;
图22为本申请实施例提供的又一种单纤双向通信方法的流程图;
图23为本申请实施例提供的又一种单纤双向通信方法的流程图;
图24为本申请实施例提供的一种对光信号Ak进行扩容的示意图;
图25为本申请实施例提供的另一种对光信号Ak进行扩容的示意图;
图26为本申请实施例提供的一种通信装置的结构示意图;
图27为本申请实施例提供的另一种通信装置的结构示意图。
具体实施方式
介绍本申请实施例之前,对本申请涉及的相关技术进行简要介绍。下述解释说明是为了让本申请实施例更容易被理解,而不应该视为对本申请实施例所要求的保护范围的限定。
通信双方能同时进行发送与接收的通信方式称之为全双工通信,不能同时进行发送与接收的通信方式称之为半双工通信。目前,光纤通信系统中绝大多数为全双工通信,也常被称作双向通信。由于光纤通信系统中的传输媒介为光纤,光信号在光纤中传输会受到反射效应的干扰,因此双向通信中的收发信号通常会承载在不同的光纤中或者在同一根光纤中使用不同的波长。
通信双方之间传输的收发信号承载在不同的光纤中可以称为双纤双向通信。对于双纤双向通信,收信号与发信号的波长可以相同,也可以不同,无需限制。
图1示出了一种基于双纤双向通信的点到点通信系统的示意图,如图1所示,节点A和节点B通过两根光纤连接。节点A通过光纤1向节点B发送光信号,光纤1中光信号的波长可以为λA。节点B通过光纤2向节点A发送光信号,光纤2中光信号的波长可以为λB。λA和λB的大小不作限制。
图2示出了一种基于双纤双向通信的点到多点通信系统的示意图,如图2所示,节点A可以与n个节点连接,节点A与n个节点中的任一个节点均可以通过两根光纤实现通信,n为正整数。该n个节点中的第k个节点可以称为节点Bk,k为1至n的正整数,从而,如图2所示,该n个节点可以包括节点B1至节点Bn。继续参考图2,节点A可以通过光纤1与分路器1连接,分路器1可以分别通过一根光纤与n个节点中的不同节点连接。节点A可以通过光纤1向n个节点中任一节点发送的光信号,节点A发送的光信号会首先通过光纤1到达分路器1,之后会经过分路器1分发给与n个节点连接的n个光纤,进而被n个节点接收到。节点A向n个节点中的不同节点发送的光信号可以在时域和/或频域上区分。节点A可以通过光纤2与分路器2连接,分路器2可以分别通过一根光纤与n个节点中的不同节点连接。节点A可以通过分路器2接收来自n个节点的光信号,n个节点中任一节点向节点A发送的光信号会首先通过该节点与分路器2之间的光纤到达分路器2,之后再通过分路器2汇总至光纤2,进而被节点A接收到。节点A向节点Bk发送的光信号的波长为λAk,节点A接收到的来自节点Bk的光信号的波长为λBk。例如,如图2所示,节点A向节点B1发送的光信号的波长为λA1,节点A接收到的来自节点B1的光信号的波长为λB1,节点A向节点B2发送的光信号的波长为λA2,节点A接收到的来自节点B2的光信号的波长为λB2,节点A向节点Bn发送的光信号的波长为λAn,节点A接收到的来自节点Bn的光信号的波长为λBn。λAk和λBk的大小不作限制,λAk与λA(k-1)的大小不作限制,λBk与λB(k-1)的大小不作限制。
通信双方之间传输的收发信号在同一根光纤中使用不同的波长可以称为单纤双向通信。对于单纤双向通信,为了避免同一光纤中不同方向上的干扰,收信号与发信号使用的波长不同。
图3示出了一种基于单纤双向通信的点到点通信系统的示意图,如图3所示,节点301和节点302通过一根光纤连接,节点301发往节点302的光信号的波长为λA,节点301发往 节点302的光信号的波长为λB,λA≠λB
图4示出了一种基于单纤双向通信的点到多点通信系统的示意图,如图4所示,节点A可以分别通过一根光纤与n个节点中的不同节点通信,该n个节点中的第k个节点可以称为节点Bk,n为正整数,k为1至n的正整数。从而,如图2所示,该n个节点可以包括节点B1至节点Bn。继续参考图4,节点A可以通过光纤1与分路器1连接,分路器1可以分别通过一根光纤与n个节点中的不同节点连接。节点A可以通过光纤1向n个节点中任一节点发送的光信号,以及接收来自n个节点中任一节点的信号。节点A发送的光信号会首先通过光纤1到达分路器1,之后会经过分路器1分发给与n个节点连接的n个光纤,从而被n个节点接收到。节点A节点n个节点中的不同节点发送的光信号可以在时域和/或频域上区分。n个节点中任一节点向节点A发送的光信号会首先通过该节点与分路器1之间的光纤到达分路器1,之后再通过分路器1汇总至光纤1,进而被节点A接收到。节点A向节点Bk发送的光信号的波长为λAk,节点A接收到的来自节点Bk的光信号的波长为λBk。例如,如图2所示,节点A向节点B1发送的光信号的波长为λA1,节点A接收到的来自节点B1的光信号的波长为λB1,节点A向节点B2发送的光信号的波长为λA2,节点A接收到的来自节点B2的光信号的波长为λB2,节点A向节点Bn发送的光信号的波长为λAn,节点A接收到的来自节点Bn的光信号的波长为λBn。λAk≠λBk,λAk与λA(k-1)的大小不作限制,λBk与λB(k-1)的大小不作限制。
相较于双纤双向通信,单纤双向通信可以只使用一根光纤就能完成两根光纤的工作,从而可以大大节省光纤资源。因此,目前单纤双向通信在光通信领域被广泛使用。
不过,在现有技术中,由于通信双方传输的收发信号的波长不同,因此需要使用两个不同波长的激光器,增加了光模块的成本。如何降低单纤双向通信系统的成本是一个需要解决的问题。
为了降低单纤双向通信系统的成本,本申请实施例提供的一种单纤双向通信方法。。。。。。。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述。其中,在本申请的描述中,除非另有说明,“/”表示前后关联的对象是一种“或”的关系,例如,A/B可以表示A或B;本申请中的“和/或”仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况,其中A,B可以是单数或者复数。并且,在本申请的描述中,除非另有说明,“多个”是指两个或多于两个。“以下至少一项(个)”或其类似表达,是指的这些项中的任意组合,包括单项(个)或复数项(个)的任意组合。例如,a,b,或c中的至少一项(个),可以表示:a,b,c,a-b,a-c,b-c,或a-b-c,其中a,b,c可以是单个,也可以是多个。另外,为了便于清楚描述本申请实施例的技术方案,在本申请的实施例中,采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定,并且“第一”、“第二”等字样也并不限定一定不同。同时,在本申请实施例中,“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言,使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念,便于理解。
首先,对本申请实施例提供的单纤双向通信方法所应用的业务场景或通信系统进行介绍。本申请可应用于各种光通信场景中,例如可以应用于无源光网络(passive optical network,PON)、无源光局域网(passive optical LAN,POL)、工业光网络、车载光网络等场景。
作为一种可能的实现方式,本申请实施例提供的单纤双向通信方法可以应用于如图3或者图4所示的通信系统。以图3为例,第一节点可以为节点A,第二节点可以为节点B。以图4为例,第一节点可以为节点A,第二节点可以为节点B1至节点Bn中的任一个。
在光通信系统中,进行光通信的节点可以通过光模块实现光信号的收发。图5为本申请实施例提供的一种光模块的结构示意图,如图5所示,光模块50可以包括激光器501、连接单元502、激光调制器503、相干接收机504、以及连接单元505。激光器501可以通过连接单元502与激光调制器503和相干接收机504连接,激光调制器503和相干接收机504可以通过连接单元505与同一光纤连接。其中,激光器501发射的激光可以经过分路器502分别输入激光调制器503和相干接收机504。激光调制器503输出的发送光信号可以经过连接单元505传输到光纤上。来自光纤的接收光信号可以通过连接单元505输入相干接收机504。
可选地,连接单元502可以为分光器或分路器,连接单元505可以为耦合器、环形器或滤波器。
可选地,激光调制器503可以包括2个输入接口,如图5所示,发送电信号和激光器501发射的激光为激光调制器503的输入。在发送电信号和激光器501发射的激光输入激光调制器503后,激光调制器503可以将发送电信号调制在激光器发射的激光的幅度上,从而输出发送光信号。
可选地,激光调制器503可以为强度调制器。例如,调制器可为马赫-曾德尔调制器(Mach-Zehnder modulator,MZM),电吸收调制器(electro absorption modulator,EAM)等。
可选地,相干接收机504可以包括2个输入接口,如图5所示,接收光信号和激光器501发射的激光为相干接收机504的输入。在接收光信号和激光器501发射的激光输入相干接收机504后,这两束光在相干接收机504内干涉叠加后,再经过光探测器转换输出接收电信号。
本申请实施例中,激光器501发射的激光可以作为相干接收机504的本振激光,来自光纤的接收光信号可以作为相干接收机504的接收信号光,在此统一说明。
可选地,相干接收机504可以为外差相干接收机或内差相干接收机。外差相干接收机可以包括单偏振外差相干接收机和双偏振外差相干接收机,内差相干接收机可以包括单偏振内差相干接收机和双偏振内差相干接收机。其中,单偏振外差相干接收机和单偏振内差相干接收机适用于接收光信号为单偏振光的场景,双偏振外差相干接收机和双偏振内差相干接收机适用于接收光信号为双偏振光的场景。
本申请实施例中,第一节点可通过第一光模块与第二节点通信,该第一光模块可以包括第一激光器,第一连接单元,第一相干接收机、第一激光调制器和第二连接单元。可选地,该第一光模块的结构就可以如图5所示的光模块类似,例如,第一激光器可以为激光器501,第一连接单元可以为连接单元502,第一激光调制器可以为激光调制器503,第一相干接收机可以为相干接收机504,第二连接单元可以为连接单元505。第二节点可通过第二光模块与第一节点通信,该第二光模块可以包括第二激光器,第三连接单元,第二相干接收机、第二激光调制器和第四连接单元。可选地,该第二光模块的结构就可以如图5所示的光模块类似,例如,第二激光器可以为激光器501,第三连接单元可以为连接单元502,第二激光调制器可以为激光调制器503,第二相干接收机可以为相干接收机504,第四连接单元可以为连接单元505。
下面将结合附图,对本实施例提供的单纤双向通信方法的具体实现方式进行详细描述。
图6示出了本申请提供的一种单纤双向通信方法的流程图。在该方法中,第一节点可通 过第一光模块与第二节点通信,第二节点可通过第二光模块与第一节点通信,对于第一光模块和第二光模块的描述可以如前文所示。
请参照图6,本实施例提供的单纤双向通信方法包括以下步骤601和602。
步骤601、第一节点通过第一激光调制器向第二节点发送第一光信号,相应地,第二节点通过第二相干接收机接收第一光信号。
第一光信号可以是第一激光调制器对第一激光器发射的激光进行调制后得到的。作为一种可能的实现方式,第一激光调制器可以通过第一连接单元接收第一激光器发射的激光。之后,第一激光调制器可以根据第一电信号和第一激光器发射的激光进行调制,从而得到第一光信号。
可选地,第一激光调制器发送的第一光信号可以通过第二连接单元传输至光纤中,进而通过该光纤发送给第二节点。
第二节点在通过第二相干接收机接收第一光信号时,第二激光器发射的激光可以作为第二相干接收机的本振光。作为一种可能的实现方式,第二相干接收机可以通过第四连接单元接收来自光纤中的第一光信号,以及可以通过第三连接单元接收来自第二激光器发射的激光。之后,第二相干接收机可以根据第一光信号和第二激光器发射的激光进行处理,得到第一电信号。
步骤602、第二节点通过第二激光调制器向第一节点发送第二光信号,相应地,第一节点通过第一相干接收机接收来自第二节点的第二光信号。
第二光信号可以是第二激光调制器对第二激光器发射的激光进行调制后得到的。作为一种可能的实现方式,第二激光调制器可以通过第三连接单元接收第二激光器发射的激光。之后,第二激光调制器可以根据第二电信号和第一激光器发射的激光进行调制,从而得到第二光信号。
可选地,第二激光调制器发送的第二光信号可以通过第四连接单元传输至光纤中,进而通过该光纤发送给第一节点。
第一节点在通过第一相干接收机接收第二光信号时,第一激光器发射的激光可以作为第一相干接收机的本振光。作为一种可能的实现方式,第一相干接收机可以通过第二连接单元接收来自光纤中的第二光信号,以及可以通过第一连接单元接收来自第一激光器发射的激光。之后,第一相干接收机可以根据第二光信号和第一激光器发射的激光进行处理,得到第二电信号。
基于上述步骤601和步骤602的单纤双向通信方法,第一节点可以通过第一激光器实现发送第一光信号和接收第二光信号的功能,第二节点可以通过第二激光器实现发送第二光信号和接收第一光信号的功能。在该方案中,第一节点和第二节点均只需使用一个激光器,该方案可以有效降低光通信的成本。
可选地,第一光信号的中心频率可以为f1,第二光信号的中心频率可以为f2,f1与f2不同,|f1-f2|小于第一阈值。应理解,f1与f2不同可以使得第一光信号与第二光信号在同一根光纤上传输时,干扰较小。而|f1-f2|小于第一阈值可以确保第一节点和第二节点能够使用一个激光器实现收发信号的功能。如果f1与f2之间的差值大于第一阈值,那么第二光信号的频率范 围会超过第一相干接收机的接收频率范围,第一节点不能通过第一相干接收机正确接收第二光信号;以及,第一光信号的频率范围会超过第二相干接收机的接收频率范围,第二节点也不能通过第二相干接收机正确接收第一光信号。
可选地,第一光信号的中心频率f1与第二光信号的中心频率f2之间的大小关系可以不作限定,f1<f2,或者,f2<f1
可选地,第一阈值与第一激光调制器和第二激光调制器所能调制的频率范围,以及第一相干接收机和第二相干接收机的接收频率范围相关。
可选地,第一光信号和第二光信号可以为单波长信号,也可以是多个子波长组成的信号,本申请对此不作限定。
可选地,第一光信号和第二光信号具有一定的带宽,占据一段连续的频率范围。其中,第一光信号的最大频带宽度可以为w1,第二光信号的最大频带宽度可以为w2
可选地,第一光信号的频率范围与第二光信号的频率范围不重复或部分重复。作为一种可能的实现方式,要求f1和f2满足可以确保第一光信号和第二光信号之间的干扰较小,不影响双向通信。在第一光信号的频率范围与第二光信号的频率范围不重复的情况下,第一光信号与第二光信号不会相互干扰。
可选地,在第一光信号的频率范围与第二光信号的频率范围不重复的情况下,第一光信号的频率范围与第二光信号的频率范围越接近,第一激光调制和第二激光调制器需要配置的调制带宽也就越小,以及第一相干接收机和第二相干接收机需要配置的接收带宽也就越小。作为一种可能的实现方式,第一光信号的频率范围与第二光信号的频率范围在时域上是连续的。
示例地,以f1<f2,第一光信号的频率范围和第二光信号的频率范围在时域上连续为例,图7示出了一种第一光信号和第二光信号的示意图。
示例地,以f2<f1,第一光信号的频率范围和第二光信号的频率范围在时域上连续为例,图8示出了另一种第一光信号和第二光信号的示意图。
可选地,若第一激光器的输出频率为f3,则或者, 其中,为第一光信号和第二光信号所占据的频率范围中的最小频率值,为第一光信号和第二光信号所占据的频率范围中的最大频率值。换言之,第一激光器的输出频率位于第一光信号和第二光信号所占据的频率范围中的最小频率值,与第一光信号和第二光信号所占据的频率范围中的最大频率值之间。应理解,若第一激光器的输出频率满足上述要求,可以降低对第一激光调制器和第一相干接收机的带宽要求。
示例地,以图7所示的第一光信号和第二光信号的示意图为例,在的情况下,第一激光器的输出频率位于第一光信号和第二光信号的频率范围内。以图8所示的第一光信号和第二光信号的示意图为例,在的情况下,第一激光器的输出频率位于第一光信号和第二光信号的频率范围内。在第一激光器的输出频率位于第一光信号和第二光信号的频率范围内的情况下,第一激光调制器根据第一激光器发射的激光调制 第一光信号时,以及第一相干接收机根据第一激光器发射的激光相干接收第二光信号时,所需要的带宽范围较小。继续参考图7和图8,如果第一激光器的输出频率位于第一光信号和第二光信号的频率范围之外,那么第一激光调制器和第一相干接收机需要的带宽范围会增大。
可选地,若第二激光器的输出频率为f4,则或者, 换言之,第二激光器的输出频率位于第一光信号和第二光信号所占据的频率范围中的最小频率值,与第一光信号和第二光信号所占据的频率范围中的最大频率值之间。应理解,若第二激光器的输出频率满足上述要求,可以降低对第二激光调制器和第二相干接收机的带宽要求。
示例地,以图7所示的第一光信号和第二光信号的示意图为例,在的情况下,第二激光器的输出频率位于第一光信号和第二光信号的频率范围内。以图8所示的第一光信号和第二光信号的示意图为例,在的情况下,第二激光器的输出频率位于第一光信号和第二光信号的频率范围内。在第二激光器的输出频率位于第一光信号和第二光信号的频率范围内的情况下,第二激光调制器根据第二激光器发射的激光调制第二光信号时,以及第二相干接收机根据第二激光器发射的激光相干接收第一光信号时,所需要的带宽范围较小。继续参考图7和图8,如果第二激光器的输出频率位于第一光信号和第二光信号的频率范围之外,那么第二激光调制器和第二相干接收机需要的带宽范围会增大。
作为一种可能的实现方,f3可以等于f1,f4可以等于f2
可选地,若第一激光器的输出频率为f3,第一相干接收机接收第二光信号的频率范围为(f3-Δx)至f3和f3至(f3+Δx),基于该配置方式,第二光信号所占据的频率范围均位于第一相干接收机的接收频率范围内,确保第一相干接收机能够接收到第二光信号。
可选地,若第二激光器的输出频率为f4,第二相干接收机接收第一光信号的频率范围为(f4-Δy)至f4和f4至(f4+Δy),基于该配置方式,第一光信号所占据的频率范围均位于第二相干接收机的接收频率范围内,确保第二相干接收机能够接收到第一光信号。
可选地,基于本申请提供的单纤双向通信方法,第一节点和第二节点还可以通过信令交互,对第一光信号和/或第二光信号进行调整。其中,对第一光信号和/或第二光信号进行的调整包括中心频率的调整和/或带宽的调整。
以调整第一光信号为例,图9示出了本申请提供的另一种单纤双向通信方法的流程图,如图9所示,本申请提供的单纤双向通信方法可以包括步骤901至步骤905。
步骤901、第一节点向第二节点发送用于对第一光信号进行调整的第一参数。相应地,第二节点接收来自第一节点的该第一参数。
可选地,若要对第一光信号的中心频率进行调整,那么该第一参数可以是与调整第一光信号的中心频率相关的参数。作为一种实现方式,该第一参数可以为调整后的第一光信号的中心频率f′1
可选地,在对第一光信号的中心频率进行调整,以及对第一光信号的带宽不调整的情况 下,
可选地,若要对第一光信号的带宽进行调整,那么该第一参数可以是与调整第一光信号的带宽相关的参数。作为一种实现方式,该第一参数可以为调整后的第一光信号占据的最大频带宽度w′1,或者,该第一参数为调整后的第一光信号占据的最大频带宽度与调整前的第一光信号占据的最大频带宽度的差值Δw1,Δw1=w′1-w1
可选地,在对第一光信号的中心频率不调整,以及对第一光信号的带宽进行调整的情况下,
可选地,若要对第一光信号的带宽和中心频率均进行调整,该第一参数可以是与调整第一光信号的中心频率和带宽相关的参数。作为一种实现方式,第一参数可以包括w′1和f′1,或者,Δw1和f′1
可选地,在对第一光信号的中心频率和带宽均进行调整的情况下,
步骤902、第二节点向第一节点发送第一指示信息,相应地,第一节点接收来自第二节点的第一指示信息。第一指示信息用于指示第二节点同意根据第一参数对第一光信号进行调整。
可选地,若第一参数所指示的调整后的第一光信号的频率范围不超出第二相干接收机所能接收的最大频率范围,则第二节点可以向第一节点发送该第一指示信息。
第一节点在接收到来自第二节点的第一指示信息后,确定可以对第一光信号进行调整,进而执行后续步骤903至905。
步骤903、第一节点向第二节点发送第二指示信息,相应地,第二节点接收来自第一节点的第二指示信息。第二指示信息用于指示第一节点开始对第一光信号进行调整。
第二节点在接收到第二指示信息后,可以获知第一节点开始对第一光信号进行调整,那么第二节点就会处于等待状态,直到获知第一节点完成调整。处于等待状态时,第二节点不向第一节点发送信号。
步骤904、第一节点将第一光信号的最大频带宽度调整为w′1,和/或,将第一光信号的中心频率调整为f′1
可选地,若第一参数为f′1,则第一节点可以将第一光信号的中心频率调整为f′1
可选地,若第一参数为w′1或Δw1,则第一节点可以将第一光信号的最大频带宽度调整为w′1
可选地,若第一参数包括w′1和f′1,或者,Δw1和f′1,则第一节点可以将第一光信号的最大频带宽度调整为w′1,以及将第一光信号的中心频率调整为f′1
步骤905、第一节点向第二节点发送第三指示信息,相应地,第二节点接收来自第一节点的第三指示信息。第三指示信息用于指示第一节点完成了对第一光信号的调整。
第二节点在接收到第三指示信息后,结束等待状态。
可选地,在第二节点接收到第三指示信息后,第二节点还可以根据第一参数适应性调整第二相干接收机的接收频率范围,确定能够接收到调整后的第一光信号。
作为一种可能的实现方式,在第一光信号的中心频率不变,最大频带宽度调整为w′1的情 况下,若第二激光器的输出频率为f4,第二相干接收机接收调整后的第一光信号的频率范围为(f4-Δa)至f4和f4至(f4+Δa),
作为一种可能的实现方式,在调整后的第一光信号的中心频率调整为f′1,最大频带宽度不变的情况下,若第二激光器的输出频率为f4,第二相干接收机接收调整后的第一光信号的频率范围为(f4-Δb)至f4和f4至(f4+Δb),
作为一种可能的实现方式,在调整后的第一光信号的中心频率调整为f′1,最大频带宽度调整为w′1的情况下,若第二激光器的输出频率为f4,第二相干接收机接收调整后的第一光信号的频率范围为(f4-Δc)至f4和f4至(f4+Δc),
以调整第二光信号为例,图10示出了本申请提供的又一种单纤双向通信方法的流程图,如图10所示,本申请提供的单纤双向通信方法可以包括步骤1001至步骤1005。
步骤1001、第一节点向第二节点发送用于对第二光信号进行调整的第二参数。相应地,第二节点接收来自第一节点的该第二参数。
可选地,若要对第二光信号的中心频率进行调整,那么该第二参数可以是与调整第二光信号的中心频率相关的参数。作为一种实现方式,该第二参数可以为调整后的第二光信号的中心频率f′2
可选地,在对第二光信号的中心频率进行调整和对第二光信号的带宽不调整的情况下,
可选地,若要对第二光信号的带宽进行调整,那么该第二参数可以是与调整第二光信号的带宽相关的参数。作为一种实现方式,该第二参数可以为调整后的第二光信号占据的最大频带宽度w′2,或者,该第二参数为调整后的第二光信号占据的最大频带宽度与调整前的第二光信号占据的最大频带宽度的差值Δw2,Δw2=w′2-w2
可选地,在对第二光信号的中心频率不调整,以及对第二光信号的带宽进行调整的情况下,
可选地,若要对第二光信号的带宽和中心频率均进行调整,该第二参数可以是与调整第二光信号的中心频率和带宽相关的参数。作为一种实现方式,第二参数可以包括w′2和/或f′2,或者,Δw2和/或f′2
可选地,在对第二光信号的中心频率和带宽均进行调整的情况下,
步骤1002、第二节点向第一节点发送第四指示信息,相应地,第一节点接收来自第二节点的第四指示信息,第四指示信息用于指示第二节点同意根据第二参数对第二光信号进行调整。
可选地,若第二参数所指示的调整后的第二光信号的频率范围不超出第二激光调制器的所能调制的最大频率范围,则第二节点向第一节点发送该第四指示信息。
第一节点在接收到来自第二节点的第四指示信息后,确定可以对第二光信号进行调整,进而执行后续步骤1003至1005。
步骤1003、第一节点向第二节点发送第五指示信息,相应地,第二节点接收来自第一节点的第五指示信息。第五指示信息用于指示第二节点开始对第二光信号进行调整。
第二节点可以根据第五指示信息的指示,开始对第二光信号进行调整。
第一节点在发送该第五指示信息后,会处于等待状态,直到获知第二节点完成调整。处于等待状态时,第一节点不向第二节点发送信号。
步骤1004、第二节点将第二光信号的最大频带宽度调整为w′2,和/或,将第二光信号的中心频率调整为f′2
可选地,若第一参数为f′2,则第一节点可以将第一光信号的中心频率调整为f′2
可选地,若第一参数为w′2或Δw2,则第一节点可以将第一光信号的最大频带宽度调整为w′2
可选地,若第一参数包括w′2和f′2,或者,Δw2和f′2,则第一节点可以将第一光信号的最大频带宽度调整为w′2,以及将第一光信号的中心频率调整为f′2
步骤1005、第二节点向第一节点发送第六指示信息,相应地,第一节点接收来自第二节点的第六指示信息。第六指示信息用于指示第二节点完成对第二光信号的调整。
第一节点在接收到第六指示信息后,结束等待状态。
可选地,在第一节点接收到第六指示信息后,第一节点还可以根据第二参数适应性调整第一相干接收机的接收频率范围,确定能够接收到调整后的第二光信号。
作为一种可能的实现方式,在调整后的第二光信号的中心频率不变,最大频带宽度调整为w′2的情况下,若第一激光器的输出频率为f3,第一相干接收机接收调整后的第二光信号的频率范围为(f3-Δd)至f3和f3至(f3+Δd),
作为一种可能的实现方式,在调整后的第二光信号的中心频率调整为f′2,最大频带宽度不变的情况下,若第一激光器的输出频率为f3,第一相干接收机接收调整后的第二光信号的频率范围为(f3-Δe)至f3和f3至(f3+Δe),
作为一种可能的实现方式,在调整后的第一光信号的中心频率调整为f′2,最大频带宽度调整为w′2的情况下,若第一激光器的输出频率为f3,第一相干接收机接收调整后的第二光信号的频率范围为(f3-Δf)至f3和f3至(f3+Δf),
以调整第一光信号和第二光信号为例,图11示出了本申请提供的又一种单纤双向通信方法的流程图,如图11所示,本申请提供的单纤双向通信方法可以包括步骤1101至步骤1108。
步骤1101、第一节点向第二节点发送用于对第一光信号和第二光信号进行调整的第三参数。相应地,第二节点接收来自第一节点的该第三参数。
可选地,若要对第一光信号的中心频率和第二光信号的中心频率进行调整,那么该第三参数可以是与调整第一光信号的中心频率和调整第二光信号的中心频率相关的参数。作为一种实现方式,该第三参数可以包括f′1和f′2
可选地,在对第一光信号的中心频率和第二光信号的中心频率进行调整的情况下,
可选地,若要对第一光信号的带宽和第二光信号的带宽进行调整,那么该第三参数可以是与调整第一光信号的带宽和调整第二光信号的带宽相关的参数。作为一种实现方式,该第 三参数可以包括w′1和w′2,或者,Δw1和Δw2,或者,w′1和Δw2,或者,Δw1和w′2
可选地,在对第一光信号的带宽和第二光信号的带宽进行调整的情况下,
可选地,若要对第一光信号的带宽和第二光信号的中心频率进行调整,那么该第三参数可以是与调整第一光信号的带宽和调整第二光信号的中心频率相关的参数。作为一种实现方式,该第三参数可以包括w′1和f′2,或者,Δw1和f′2
可选地,在对第一光信号的带宽和第二光信号的中心频率进行调整的情况下,
可选地,若要对第一光信号的带宽、第一光信号的中心频率、以及第二光信号的中心频率进行调整,那么该第三参数可以是与调整第一光信号的带宽、调整第一光信号的中心频率、以及调整第二光信号的中心频率相关的参数。作为一种实现方式,该第三参数可以包括w′1、f′1、以及f′2,或者,Δw1、f′1、以及f′2
可选地,在对第一光信号的带宽、第一光信号的中心频率、以及第二光信号的中心频率进行调整的情况下,
可选地,若要对第二光信号的带宽和第一光信号的中心频率进行调整,那么该第三参数可以是与调整第二光信号的带宽和调整第一光信号的中心频率相关的参数。作为一种实现方式,该第三参数可以包括w′2和f′1,或者,Δw2和f′1
可选地,在对第二光信号的带宽和第一光信号的中心频率进行调整的情况下,
可选地,若要对第二光信号的带宽、第二光信号的中心频率、以及第一光信号的中心频率进行调整,那么该第三参数可以是与调整第二光信号的带宽、调整第二光信号的中心频率、以及调整第一光信号的中心频率相关的参数。作为一种实现方式,该第三参数可以包括w′2、f′2、以及f′1,或者,Δw2、f′2、以及f′1
可选地,在对第二光信号的带宽、第二光信号的中心频率、以及第一光信号的中心频率进行调整的情况下,
步骤1102、第二节点向第一节点发送第七指示信息,相应地,第一节点接收来自第二节点的第七指示信息。第七指示信息用于指示第二节点同意根据第三参数对第一光信号和第二光信号进行调整。
可选地,若第三参数所指示的调整后的第一光信号的频率范围不超出第二相干接收机所能接收的最大频率范围,以及调整后的第二光信号的频率范围不超出第二激光调制器所能调制的最大频率范围,则第二节点可以向第一节点发送该第七指示信息。
第一节点在接收到来自第二节点的第七指示信息后,确定可以对第一光信号和第二光信号进行调整,进而执行后续步骤1103至1108。
步骤1103、第一节点向第二节点发送第二指示信息,相应地,第二节点接收来自第一节点的第二指示信息。第二指示信息用于指示第一节点开始对第一光信号进行调整。
该步骤1103可以参考步骤903的相关描述,此处不再赘述。
步骤1104、第一节点将第一光信号的最大频带宽度调整为w′1,和/或,将第一光信号的中心频率调整为f′1
可选地,若第三参数中包括f′1,则第一节点可以将第一光信号的中心频率调整为f′1
可选地,若第三参数中包括w′1或Δw1,则第一节点可以将第一光信号的最大频带宽度调整为w′1
可选地,若第三参数中包括w′1和f′1,或者,Δw1和f′1,则第一节点可以将第一光信号的最大频带宽度调整为w′1,以及将第一光信号的中心频率调整为f′1
步骤1105、第一节点向第二节点发送第三指示信息,相应地,第二节点接收来自第一节点的第三指示信息。第三指示信息用于指示第一节点完成对第一光信号的调整。
该步骤1105可以参考步骤905的相关描述,此处不再赘述。
步骤1106、第一节点向第二节点发送第五指示信息,相应地,第二节点接收来自第一节点的第五指示信息。第五指示信息用于指示第二节点开始对第二光信号进行调整。
该步骤1106可以参考步骤1003的相关描述,此处不再赘述。
步骤1107、第二节点将第二光信号的最大频带宽度调整为w′2,和/或,将第二光信号的中心频率调整为f′2
可选地,若第三参数中包括f′2,则第二节点可以将第二光信号的中心频率调整为f′2
可选地,若第三参数中包括w′2或Δw2,则第二节点可以将第二光信号的最大频带宽度调整为w′2
可选地,若第三参数中包括w′2和f′2,或者,Δw2和f′2,则第二节点可以将第二光信号的最大频带宽度调整为w′2,以及将第一光信号的中心频率调整为f′2
步骤1108、第二节点向第一节点发送第六指示信息,相应地,第一节点接收来第二节点的第六指示信息。第六指示信息用于指示第二节点完成对第二光信号的调整。
该步骤1108可以参考步骤1005的相关描述,此处不再赘述。
继续以调整第一光信号和第二光信号为例,图12示出了本申请提供的又一种单纤双向通信方法的流程图,如图12所示,本申请提供的单纤双向通信方法可以包括步骤1201至步骤1208。
步骤1201、第一节点向第二节点发送用于对第一光信号和第二光信号进行调整的第三参数。相应地,第二节点接收来自第一节点的该第三参数。
该步骤1201可以参考步骤1101的相关描述,此处不再赘述。
步骤1202、第二节点向第一节点发送第七指示信息,相应地,第一节点接收来自第二节点的第七指示信息。第七指示信息用于指示第二节点同意根据第三参数对第一光信号和第二光信号进行调整。
该步骤1202可以参考步骤1102的相关描述,此处不再赘述。
步骤1203、第一节点向第二节点发送第五指示信息,相应地,第二节点接收来自第一节点的第五指示信息。第五指示信息用于指示第二节点开始对第二光信号进行调整。
该步骤1203可以参考步骤1106的相关描述,此处不再赘述。
步骤1204、第二节点将第二光信号的最大频带宽度调整为w′2,和/或,将第二光信号的中心频率调整为f′2
该步骤1204可以参考步骤1107的相关描述,此处不再赘述。
步骤1205、第二节点向第一节点发送第六指示信息,相应地,第一节点接收来第二节点的第六指示信息。第六指示信息用于指示第二节点完成对第二光信号的调整。
该步骤1205可以参考步骤1108的相关描述,此处不再赘述。
步骤1206、第一节点向第二节点发送第二指示信息,相应地,第二节点接收来自第一节点的第二指示信息。第二指示信息用于指示第一节点开始对第一光信号进行调整。
该步骤1206可以参考步骤1103的相关描述,此处不再赘述。
步骤1207、第一节点将第一光信号的最大频带宽度调整为w′1,和/或,将第一光信号的中心频率调整为f′1
该步骤1207可以参考步骤1104的相关描述,此处不再赘述。
步骤1208、第一节点向第二节点发送第三指示信息,相应地,第二节点接收来自一节点的第三指示信息。第三指示信息用于指示第一节点完成对第一光信号的调整。
该步骤1208可以参考步骤1105的相关描述,此处不再赘述。
根据上述图9至图12对应的单纤双向通信方法,可以实现对第一节点和第二节点之间传输的第一光信号和/或第二光信号的调整。
可选地,在上述图9至图12对应的实施例中,w1<w′1,或者,w1>w′1。w2<w′2,或者,w2>w′2。换言之,调制第一光信号的带宽可以是将第一光信号的带宽调大,也可以是将第一光信号的带宽调小。调制第二光信号的带宽可以是将第二光信号的带宽调大,也可以是将第二光信号的带宽调小。
将光信号的带宽调大可以理解为对通信带宽进行扩容,上述图9至图12对应的实施例的方法可以用于对单纤双向通信的带宽进行扩容。在现有技术中,若需要对光通信中的通信带宽进行扩容,一般需要额外增加光模块来增加光信号,从而提高通信带宽。而基于本申请实施例的方案,通信的双方可以通过对光模块的配置来增大光信号的带宽,从而可以提高通信带宽。该方法无需引入额外的器件来实现,能够降低成本。
作为一种可能的实现方式,想要对第一光信号进行带宽扩容时,如果那么可以直接调整第一光信号的带宽,无需对第一光信号和第二光信号的中心频率进行调整。示例地,图13示出了一种对第一光信号进行扩容的示意图,如图13所示,第一光信号与第二光信号的中心频率无需调整,直接将第一光信号的最大频带宽度由w1扩容为w′1
作为一种可能的实现方式,想要对第一光信号进行带宽扩容时,若则第一节点还可以确定需要对第一光信号和/或第二光信号的中心频率进行调整。示例地,图14示出了另一种对第一光信号进行扩容的示意图,如图14所示,可以先将第一光信号的中心频率调整为f′1,使得之后再将第一光信号的带宽由w1扩容为w′1。又示例地,图15示出了又一种对第一光信号进行扩容的示意图,如图15所示,可以先将第二光信号的中心频率调整为f′2,使得之后再将第一光信号的带宽由w1扩容为w′1
应理解,对第二光信号的扩容方法与上述图13至图15中对第一光信号的扩容方法类似,此处不再举例赘述。
可选地,上述实施例所描述的单纤双向通信方法可以应用于点到点通信系统(如图3所示的点到点通信系统)中。示例地,第一节点可以为图3中的节点A,第二节点可以为图3中的节点B。
可选地,上述实施例所描述的单纤双向通信方法可以应用于点到多点通信系统(如图4所示的点到多点通信系统)中。其中,该第一节点可以通过第一光模块与n个节点进行通信,该第二节点可以为n个节点中的一个。其中,n≥2。示例地,第一节点可以为图4中的节点A,第二节点可以为图4中的节点B1至节点Bn中的任一个。
可选地,在第二节点为n个节点中的第k个节点的情况下,第一光信号即为第一节点向n个节点中的第k个节点发送的光信号Ak,第二光信号即为n个节点中的第k个节点向第一节点发送的光信号Bk。若光信号Ak的中心频率为fAk,光信号Bk的中心频率为fBk,则f1=fAk,f2=fBk。从而,fAk与fBk不同,|fAk-fBk|小于第一阈值。其中,fAk为光信号Ak的中心频率,fBk为光信号Bk的中心频率,k为1至n的正整数。
可选地,光信号Ak与光信号Bk的中心频率的大小关系不做限定。作为一种可能的实现方式,fAk<fBk或者fBk<fAk
可选地,光信号Ak的频率范围与光信号Bk的频率范围不重复或部分重复。作为一种可能的实现方式,其中,为光信号Ak的最大频带宽度,为光信号Bk的最大频带宽度。
可选地,第一节点与n个节点中的不同节点之间传输的光信号的中心频率的大小关系,本申请不作限定。即fAk与fAx的大小关系、fAk与fBx的大小关系、fBk与fAx的大小关系、以及fBk与fBx的大小关系均不作限定。其中,fAx是第一节点向n个节点中的第x个节点发送的光信号Ax的中心频率,fBx是n个节点中的第x个节点向第一节点发送的光信号Bx的中心频率,x为1至n的正整数,x不等于k。
作为一种可能的实现方式,第一节点与n个节点中的不同节点之间传输的光信号的中心频率可以不同。即光信号Ax与光信号Ak或光信号Bk的中心频率不同,光信号Bx与光信号Ak或光信号Bk的中心频率也不同,fAk≠fBk≠fAx≠fBx。此种情况下,第一节点与n个节点之间传输着2n个中心频率不同的光信号,也就是第一节点与n个节点之间传输的光信号使用了2n个不同的波长。
作为另一种可能的实现方式,第一节点与n个节点中的不同节点之间传输的光信号的中心频率可以相同。即光信号Ax与光信号Ak或光信号Bk的中心频率可以相同,和/或,光信号Bx与光信号Ak或光信号Bk的中心频率可以相同,存在fAk=fAx、或fAk=fBx、或fBk=fAx、或fBk=fBx的情况。此种情况下,第一节点与n个节点之间传输的光信号使用的中心频率的数量小于2n,也就是第一节点与n个节点之间传输的光信号使用的波长数量小于2n。
可选地,若光信号Ax与光信号Ak的中心频率相同(也即波长相同),该光信号Ax与光信号Ak可以在时域上进行区分。若光信号Bx与光信号Bk的中心频率相同(也即波长相同),该光信号Bx与光信号Bk可以在时域上进行区分。
可选地,光信号Ak与光信号Bk在频域上可以是相邻的。即光信号Ak与光信号Bk的中心频率均小于光信号Ax与光信号Bx的中心频率,或者光信号Ak与光信号Bk的中心频率均大于光信号Ax与光信号Bx的中心频率。作为一种可能的实现方式,在k>1的情况下,fAk>fA(k-1),且fAk>fB(k-1),且fBk>fA(k-1),且fBk>fB(k-1)
可选地,第一节点与n个节点中的不同节点之间传输的光信号的频率范围不重复或部分重复。作为一种可能的实现方式,在第一节点与n个节点传输的所有光信号中,若光信号Ak与光信号Ax在频域上是最接近的,则若光信号Ak与光信号Bx在频域上是最接近的,则其中,wAx为光信号Ax的最大频带宽度,wBx为光信号Bx的最大频带宽度。
可选地,若光信号Ak的频率范围与光信号Bk的频率范围不重复,且第一节点与n个节点中的不同节点之间传输的光信号的频率范围也不重复,则第一节点与n个节点传输的所有光信号的频率范围均不重复。作为一种可能的实现方式,第一节点与n个节点传输的所有光信号的频率范围在频域上可以是连续的。
可选地,第一节点与n个节点中的不同节点之间传输的光信号的最大频带宽度可以相同,也可以不同。其中,若第一节点与n个节点中的不同节点之间传输的光信号的最大频带宽度不同,则意味着第一节点与n个节点中的不同节点之间的通信带宽不同。
示例地,假设第一节点与n个节点传输的所有光信号的频率范围在频域上是连续的,且不同光信号的最大频带宽度是相同的。并且,在k>1的情况下,fAk>fA(k-1),且fAk>fB(k-1),且fBk>fA(k-1),且fBk>fB(k-1)。以及,fAk<fBk。此种情况下,第一节点与n个节点之间传输的光信号的示意图可以如图16所示,其中,光信号A1至光信号An、以及光信号B1至光信号Bn的最大频带宽度均相同,占据的频率范围在频域上连续,fA1<fB1<fA2<fB2<……<fA(n-1)<fB(n-1)<fAn<fBn
示例地,假设第一节点与n个节点传输的所有光信号的频率范围在频域上是连续的,且不同光信号的最大频带宽度是相同的。并且,在k>1的情况下,fAk>fA(k-1),且fAk>fB(k-1),且fBk>fA(k-1),且fBk>fB(k-1)。以及,fBk<fAk。此种情况下,第一节点与n个节点之间传输的光信号的示意图可以如图17所示,图17中示出了光信号A1至光信号An、以及光信号B1至光信号Bn的频率属性和带宽属性。其中,光信号A1至光信号An、以及光信号B1至光信号Bn的最大频带宽度均相同,占据的频率范围在频域上连续,fB1<fA1<fB2<fA2<……<fB(n-1)<fA(n-1)<fBn<fAn
示例地,假设第一节点与n个节点传输的所有光信号的频率范围在频域上是连续的,且不同光信号的最大频带宽度是相同的。并且,在k>1的情况下,fAk>fA(k-1),且fAk>fB(k-1),且fBk>fA(k-1),且fBk>fB(k-1)。以及,若k为奇数,fAk<fBk,若k为偶数,fBk<fAk。此种情况下,若n为偶数,第一节点与n个节点之间传输的光信号的示意图可以如图18中的(A)所示,其中,光信号A1至光信号An、以及光信号B1至光信号Bn的最大频带宽度均相同,占据的频率范围在频域上连续,fA1<fB1<fB2<fA2<……<fA(n-1)<fB(n-1)<fBn<fAn。若n为奇数,第一节点与n个节点之间传输的光信号的示意图可以如图18中的(B)所示,其中,光信号A1至光信号An、以及光信号B1至光信号Bn的最大频带宽度均相同,占据的频率范围在频域上连续,fA1<fB1<fB2<fA2<……<fB(n-1)<fA(n-1)<fAn<fBn
示例地,假设第一节点与n个节点传输的所有光信号的频率范围在频域上是连续的,且 不同光信号的最大频带宽度是相同的。并且,在k>1的情况下,fAk>fA(k-1),且fAk>fB(k-1),且fBk>fA(k-1),且fBk>fB(k-1)。以及,若k为奇数,fBk<fAk,若k为偶数,fAk<fBk。此种情况下,若n为偶数,第一节点与n个节点之间传输的光信号的示意图可以如图19中的(A)所示,其中,光信号A1至光信号An、以及光信号B1至光信号Bn的最大频带宽度均相同,占据的频率范围在频域上连续,fB1<fA1<fA2<fB2<……<fB(n-1)<fA(n-1)<fAn<fBn。若n为奇数,第一节点与n个节点之间传输的光信号的示意图可以如图19中的(B)所示,其中,光信号A1至光信号An、以及光信号B1至光信号Bn的最大频带宽度均相同,占据的频率范围在频域上连续,fB1<fA1<fA2<fB2<……<fA(n-1)<fB(n-1)<fBn<fAn
可选地,在第一节点与n个节点传输的光信号的中心频率和带宽符合第一条件或第二条件时,可以将第一节点接收光信号Bk的接收频率范围调整为 从而可以降低第一节点同时接收到多个光信号的概率,降低第一节点在接收光信号Bk时的干扰。其中,第一条件为:在k>1的情况下,在fAk>fA(k-1),且fAk>fB(k-1),且fBk>fA(k-1),且fBk>fB(k-1)。以及,若k为奇数,fAk<fBk,若k为偶数,fBk<fAk。第二条件为:在k>1的情况下,在fAk>fA(k-1),且fAk>fB(k-1),且fBk>fA(k-1),且fBk>fB(k-1)。并且,若k为奇数,fBk<fAk,若k为偶数,fAk<fBk
示例地,图18所示的光信号符合第一条件,图19所示的光信号符合第二条件,参考图18或图19,假设第一节点接收光信号B2的接收频率范围设置为那么第一节点在该频率范围内只会接收到光信号B2,不会接收到光信号B1或光信号B3
可选地,在点到多点通信的场景中,第一节点与n个节点中的任一个节点也可以通过信令交互,对光信号Ak和/或光信号Bk进行调整。其中,对光信号Ak和/或光信号Bk进行的调整包括中心频率的调整和/或带宽的调整。
以调整光信号Ak为例,图20示出了本申请提供的又一种单纤双向通信方法的流程图,如图20所示,本申请提供的单纤双向通信方法可以包括步骤2001至步骤2005。
步骤2001、第一节点向n个节点中的第k个节点发送用于对光信号Ak进行调整的第四参数。相应地,n个节点中的第k个节点接收来自第一节点的该第四参数。
可选地,若要对光信号Ak的中心频率进行调整,那么该第四参数可以是与调整光信号Ak的中心频率相关的参数。作为一种实现方式,该第四参数可以为调整后的光信号Ak的中心频率f′Ak
可选地,在对光信号Ak的中心频率进行调整,以及对光信号Ak的带宽不调整的情况下,
可选地,若要对光信号Ak的带宽进行调整,那么该第四参数可以是与调整光信号Ak的带宽相关的参数。作为一种实现方式,该第四参数可以为调整后的光信号Ak占据的最大频带宽度w′Ak,或者,该第四参数为调整后的光信号Ak占据的最大频带宽度与调整前的光信号Ak占据的最大频带宽度的差值ΔwAk,ΔwAk=w′Ak-wAk
可选地,在对光信号Ak的中心频率不调整,以及对光信号Ak的带宽进行调整的情况下,
可选地,若要对光信号Ak的带宽和中心频率均进行调整,该第四参数可以是与调整光信号Ak的带宽和中心频率相关的参数。作为一种实现方式,第四参数可以包括w′Ak和f′Ak,或者,ΔwAk和f′Ak
可选地,在对光信号Ak的中心频率和带宽均进行调整的情况下,
步骤2002、n个节点中的第k个节点向第一节点发送第八指示信息,相应地,第一节点接收来自n个节点中的第k个节点的第八指示信息。第八指示信息用于指示n个节点中的第k个节点同意根据第四参数对光信号Ak进行调整。
可选地,若第四参数所指示的调整后的光信号Ak的频率范围,不超出n个节点中的第k个节点所能接收的最大频率范围,则该n个节点中的第k个节点可以向第一节点发送该第八指示信息。
第一节点在接收到来自该n个节点中的第k个节点的第八指示信息后,确定可以对光信号Ak进行调整,进而执行后续步骤2003至2005。
步骤2003、第一节点向n个节点中的第k个节点发送第九指示信息,相应地,n个节点中的第k个节点接收来自第一节点的第九指示信息。第九指示信息用于指示第一节点开始对光信号Ak进行调整。
n个节点中的第k个节点在接收到第九指示信息后,可以获知第一节点开始对光信号Ak进行调整,那么n个节点中的第k个节点就会处于等待状态,直到获知第一节点完成调整。处于等待状态时,n个节点中的第k个节点不向第一节点发送信号。
步骤2004、第一节点将光信号Ak的最大频带宽度调整为w′Ak,和/或,将光信号Ak的中心频率调整为f′Ak
可选地,若第四参数为f′Ak,则第一节点可以将光信号Ak的中心频率调整为f′Ak
可选地,若第四参数为w′Ak或ΔwAk,则第一节点可以将光信号Ak的最大频带宽度调整为w′Ak
可选地,若第四参数包括w′Ak和f′Ak,或者,ΔwAk和f′Ak,则第一节点可以将光信号Ak的最大频带宽度调整为w′1,以及将第一光信号的中心频率调整为f′1
步骤2005、第一节点向n个节点中的第k个节点发送第十指示信息,相应地,n个节点中的第k个节点接收来自第一节点的第十指示信息。第十指示信息用于指示第一节点完成对光信号Ak的调整。
n个节点中的第k个节点接收到第十指示信息后,结束等待状态。
可选地,在n个节点中的第k个节点接收到第十指示信息后,n个节点中的第k个节点还可以根据第四参数适应性调整该节点中的相干接收机的接收频率范围,确定能够接收到调整后的光信号Ak
作为一种可能的实现方式,在光信号Ak的中心频率不变,最大频带宽度调整为w′Ak的情况下,若n个节点中的第k个节点的激光器的输出频率为fLBk,n个节点中的第k个节点的相干接收机接收调整后的光信号Ak的频率范围为(fLBk-Δg)至fLBk和fLBk至(fLBk+Δg),
作为一种可能的实现方式,在调整后的光信号Ak的中心频率调整为f′Ak,最大频带宽度不变的情况下,若n个节点中的第k个节点的激光器的输出频率为fLBk,n个节点中的第k个节点的相干接收机接收调整后的光信号Ak的频率范围为(fLBk-Δh)至fLBk和fLBk至(fLBk+Δh),
作为一种可能的实现方式,在调整后的光信号Ak的中心频率调整为f′Ak,最大频带宽度调整为w′Ak的情况下,若n个节点中的第k个节点的激光器的输出频率为fLBk,n个节点中的第k个节点的相干接收机接收调整后的光信号Ak的频率范围为(fLBk-Δi)至fLBk和fLBk至(fLBk+Δi),
以调整光信号Bk为例,图21示出了本申请提供的又一种单纤双向通信方法的流程图,如图21所示,本申请提供的单纤双向通信方法可以包括步骤2101至步骤2105。
步骤2101、第一节点向n个节点中的第k个节点发送用于对光信号Bk进行调整的第五参数。相应地,n个节点中的第k个节点接收来自第一节点的该第五参数。
可选地,若要对光信号Bk的中心频率进行调整,那么该第五参数可以是与调整光信号Bk的中心频率相关的参数。作为一种实现方式,该第五参数可以为调整后的光信号Bk的中心频率f′Bk
可选地,在对光信号Bk的中心频率进行调整,以及对光信号Bk的带宽不调整的情况下,
可选地,若要对光信号Bk的带宽进行调整,那么该第五参数可以是与调整光信号Bk的带宽相关的参数。作为一种实现方式,该第五参数可以为调整后的光信号Bk占据的最大频带宽度w′Bk,或者,该第五参数为调整后的光信号Bk占据的最大频带宽度与调整前的光信号Bk占据的最大频带宽度的差值ΔwBk,ΔwBk=w′Bk-wBk
可选地,在对光信号Bk的中心频率不调整,以及对光信号Bk的带宽进行调整的情况下,
可选地,若要对光信号Bk的带宽和中心频率均进行调整,该第五参数可以是与调整光信号Bk的带宽和中心频率相关的参数。作为一种实现方式,第五参数可以包括w′Bk和f′Bk,或者,ΔwBk和f′Bk
可选地,在对光信号Bk的中心频率和带宽均进行调整的情况下,
步骤2102、n个节点中的第k个节点向第一节点发送第十一指示信息,相应地,第一节点接收来自n个节点中的第k个节点的第十一指示信息。第十一指示信息用于指示n个节点中的第k个节点同意根据第五参数对光信号Bk进行调整。
可选地,若第五参数所指示的调整后的光信号Bk的频率范围,不超出n个节点中的第k个节点的激光调制器的所能调制的最大频率范围,则n个节点中的第k个节点向第一节点发送该第十一指示信息。
第一节点在接收到来自n个节点中的第k个节点的第十一指示信息后,确定可以对光信号Bk进行调整,进而执行后续步骤2103至2105。
步骤2103、第一节点向n个节点中的第k个节点发送第十二指示信息,相应地,n个节点中的第k个节点接收来自第一节点的第十二指示信息。第十二指示信息用于指示n个节点中的第k个节点开始对光信号Bk进行调整。
n个节点中的第k个节点可以根据第十二指示信息的指示,开始对第二光信号进行调整。
第一节点在发送该第十二指示信息后,会处于等待状态,直到获知n个节点中的第k个节点完成调整。处于等待状态时,第一节点不向n个节点中的第k个节点发送信号。
步骤2104、n个节点中的第k个节点将光信号Bk的最大频带宽度调整为w′Bk,和/或,将光信号Bk的中心频率调整为f′Bk
可选地,若第五参数为f′Bk,则第一节点可以将光信号Bk的中心频率调整为f′Bk
可选地,若第五参数为w′Bk或ΔwBk,则第一节点可以将光信号Bk的最大频带宽度调整为w′Bk
可选地,若第五参数包括w′Bk和f′Bk,或者,ΔwBk和f′Bk,则第一节点可以将光信号Bk的最大频带宽度调整为w′Bk,以及将第一光信号的中心频率调整为f′Bk
步骤2105、n个节点中的第k个节点向第一节点发送第十三指示信息,相应地,第一节点接收来自n个节点中的第k个节点的第十三指示信息。第十三指示信息用于指示n个节点中的第k个节点完成对光信号Bk的调整。
第一节点在接收到第十三指示信息后,结束等待状态。
可选地,在第一节点接收到第十三指示信息后,第一节点还可以根据第五参数适应性调整第一相干接收机的接收频率范围,确定能够接收到调整后的光信号Bk
作为一种可能的实现方式,在调整后的光信号Bk的中心频率不变,最大频带宽度调整为w′Bk的情况下,若第一激光器的输出频率为fLAk,第一相干接收机接收调整后的光信号Bk的频率范围为(fLAk-Δj)至fLAk和fLAk至(fLAk+Δj),
作为一种可能的实现方式,在调整后的第一光信号的中心频率调整为f′2,最大频带宽度不变的情况下,若第一激光器的输出频率为fLAk,第一相干接收机接收调整后的光信号Bk的频率范围为(fLAk-Δk)至fLAk和fLAk至(fLAk+Δk),
作为一种可能的实现方式,在调整后的第一光信号的中心频率调整为f′2,最大频带宽度调整为w′2的情况下,若第一激光器的输出频率为fLAk,第一相干接收机接收调整后的光信号Bk的频率范围为(fLAk-Δl)至fLAk和fLAk至(fLAk+Δl),
以调整光信号Ak和光信号Bk为例,图22示出了本申请提供的又一种单纤双向通信方法的流程图,如图22所示,本申请提供的单纤双向通信方法可以包括步骤2201至步骤2208。
步骤2201、第一节点向n个节点中的第k个节点发送用于对光信号Ak和光信号Bk进行调整的第六参数。相应地,n个节点中的第k个节点接收来自第一节点的该第六参数。
可选地,若要对光信号Ak的中心频率和光信号Bk的中心频率进行调整,那么该第六参数可以是与调整光信号Ak的中心频率和调整光信号Bk的中心频率相关的参数。作为一种实现方 式,该第六参数可以包括f′Ak和f′Bk
可选地,在对光信号Ak的中心频率和光信号Bk的中心频率进行调整的情况下,
可选地,若要对光信号Ak的带宽和光信号Bk的带宽进行调整,那么该第六参数可以是与调整光信号Ak的带宽和调整光信号Bk的带宽相关的参数。作为一种实现方式,该第六参数可以包括w′Ak和w′Bk,或者,ΔwAk和ΔwBk,或者,w′Ak和ΔwBk,或者,ΔwAk和w′Bk
可选地,在对光信号Ak的带宽和光信号Bk的带宽进行调整的情况下,
可选地,若要对光信号Ak的带宽和光信号Bk的中心频率进行调整,那么该第六参数可以是与调整光信号Ak的带宽和调整光信号Bk的中心频率相关的参数。作为一种实现方式,该第六参数可以包括w′Ak和f′Bk,或者,ΔwAk和f′Bk
可选地,在对光信号Ak的带宽和光信号Bk的中心频率进行调整的情况下,
可选地,若要对光信号Ak的带宽、光信号Ak的中心频率、以及光信号Bk的中心频率进行调整,那么该第六参数可以是与调整光信号Ak的带宽、调整光信号Ak的中心频率、以及调整光信号Bk的中心频率相关的参数。作为一种实现方式,该第六参数可以包括w′Ak、f′Ak、以及f′Bk,或者,ΔwAk、f′Ak、以及f′Bk
可选地,在对光信号Ak的带宽、光信号Ak的中心频率、以及光信号Bk的中心频率进行调整的情况下,
可选地,若要对光信号Bk的带宽和光信号Ak的中心频率进行调整,那么该第六参数可以是与调整光信号Bk的带宽和调整光信号Ak的中心频率相关的参数。作为一种实现方式,该第六参数可以包括w′Bk和f′Ak,或者,ΔwBk和f′Ak
可选地,在对光信号Bk的带宽和光信号Ak的中心频率进行调整的情况下,
可选地,若要对光信号Bk的带宽、光信号Bk的中心频率、以及光信号Ak的中心频率进行调整,那么该第六参数可以是与调整光信号Bk的带宽、调整光信号Bk的中心频率、以及调整光信号Ak的中心频率相关的参数。作为一种实现方式,该第六参数可以包括w′Bk、f′Bk、以及f′Ak,或者,ΔwBk、f′Bk、以及f′Ak
可选地,在对光信号Bk的带宽、光信号Bk的中心频率、以及光信号Ak的中心频率进行调整的情况下,
步骤2202、n个节点中的第k个节点向第一节点发送第十四指示信息,相应地,第一节点接收来自n个节点中的第k个节点的第十四指示信息。第十四指示信息用于指示n个节点中的第k个节点同意根据第六参数对光信号Ak和光信号Bk进行调整。
可选地,若第六参数所指示的调整后的光信号Ak的频率范围不超出n个节点中的第k个节点的相干接收机所能接收的最大频率范围,以及调整后的光信号Bk的频率范围不超出n个 节点中的第k个节点的激光调制器所能调制的最大频率范围,则n个节点中的第k个节点可以向第一节点发送该第十四指示信息。
第一节点在接收到来自n个节点中的第k个节点的第十四指示信息后,确定可以对光信号Ak和光信号Bk进行调整,进而执行后续步骤2203至2208。
步骤2203、第一节点向n个节点中的第k个节点发送第九指示信息示,相应地,n个节点中的第k个节点接收来自第一节点的第九指示信息。第九指示信息用于指示第一节点开始对光信号Ak进行调整。
该步骤2203可以参考步骤2003的相关描述,此处不再赘述。
步骤2204、第一节点将光信号Ak的最大频带宽度调整为w′Ak,和/或,将光信号Ak的中心频率调整为f′Ak
可选地,若第六参数中包括f′Ak,则第一节点可以将光信号Ak的中心频率调整为f′Ak
可选地,若第六参数中包括w′Ak或ΔwAk,则第一节点可以将光信号Ak的最大频带宽度调整为w′Ak
可选地,若第六参数中包括w′Ak和f′Ak,或者,ΔwAk和f′Ak,则第一节点可以将光信号Ak的最大频带宽度调整为w′Ak,以及将第一光信号的中心频率调整为f′Ak
步骤2205、第一节点向n个节点中的第k个节点发送第十指示信息,相应地,n个节点中的第k个节点接收来自第一节点的第十指示信息。第十指示信息用于指示第一节点完成对光信号Ak的调整。
该步骤2205可以参考步骤2005的相关描述,此处不再赘述。
步骤2206、第一节点向n个节点中的第k个节点发送第十二指示信息,相应地,n个节点中的第k个节点接收来自第一节点的第十二指示信息。第十二指示信息用于指示n个节点中的第k个节点开始对光信号Bk进行调整。
该步骤2206可以参考步骤2003的相关描述,此处不再赘述。
步骤2207、n个节点中的第k个节点将光信号Bk的最大频带宽度调整为w′Bk,和/或,将光信号Bk的中心频率调整为f′Bk
可选地,若第六参数中包括f′Bk,则n个节点中的第k个节点可以将光信号Bk的中心频率调整为f′Bk
可选地,若第六参数中包括w′Bk或ΔwBk,则n个节点中的第k个节点可以将光信号Bk的最大频带宽度调整为w′Bk
可选地,若第六参数中包括w′Bk和f′Bk,或者,ΔwBk和f′Bk,则n个节点中的第k个节点可以将光信号Bk的最大频带宽度调整为w′Bk,以及将第一光信号的中心频率调整为f′Bk
步骤2208、n个节点中的第k个节点向第一节点发送第十三指示信息,相应地,第一节点接收来n个节点中的第k个节点的第十三指示信息。第十三指示信息用于指示n个节点中的第k个节点完成对光信号Bk的调整。
该步骤2208可以参考步骤2005的相关描述,此处不再赘述。
以调整光信号Ak和光信号Bk为例,图23示出了本申请提供的又一种单纤双向通信方法的流程图,如图23所示,本申请提供的单纤双向通信方法可以包括步骤2301至步骤2308。
步骤2301、第一节点向n个节点中的第k个节点发送用于对光信号Ak和光信号Bk进行调整的第六参数。相应地,n个节点中的第k个节点接收来自第一节点的该第六参数。
该步骤1231可以参考步骤1101的相关描述,此处不再赘述。
步骤2302、n个节点中的第k个节点向第一节点发送第十四指示信息,相应地,第一节点接收来自n个节点中的第k个节点的第十四指示信息。第十四指示信息用于指示n个节点中的第k个节点同意根据第六参数对光信号Ak和光信号Bk进行调整。
该步骤2302可以参考步骤2202的相关描述,此处不再赘述。
步骤2303、第一节点向n个节点中的第k个节点发送第十二指示信息,相应地,n个节点中的第k个节点接收来自第一节点的第十二指示信息。第十二指示信息用于指示n个节点中的第k个节点开始对光信号Bk进行调整。
该步骤1233可以参考步骤2206的相关描述,此处不再赘述。
步骤2304、n个节点中的第k个节点将光信号Bk的最大频带宽度调整为w′Bk,和/或,将光信号Bk的中心频率调整为f′Bk
该步骤2304可以参考步骤2207的相关描述,此处不再赘述。
步骤2305、n个节点中的第k个节点向第一节点发送第十三指示信息,相应地,第一节点接收来n个节点中的第k个节点的第十三指示信息。第十三指示信息用于指示n个节点中的第k个节点完成对光信号Bk的调整。
该步骤2305可以参考步骤2208的相关描述,此处不再赘述。
步骤2306、第一节点向n个节点中的第k个节点发送第九指示信息示,相应地,n个节点中的第k个节点接收来自第一节点的第九指示信息。第九指示信息用于指示第一节点开始对光信号Ak进行调整。
该步骤2306可以参考步骤2203的相关描述,此处不再赘述。
步骤2307、第一节点将光信号Ak的最大频带宽度调整为w′Ak,和/或,将光信号Ak的中心频率调整为f′Ak
该步骤2307可以参考步骤2204的相关描述,此处不再赘述。
步骤2308、第一节点向n个节点中的第k个节点发送第十指示信息,相应地,n个节点中的第k个节点接收来自第一节点的第十指示信息。第十指示信息用于指示第一节点完成对光信号Ak的调整。
该步骤2308可以参考步骤2205的相关描述,此处不再赘述。
根据上述图20至图23对应的单纤双向通信方法,可以实现对第一节点和n个节点中的第k个节点之间传输的光信号Ak和/或光信号Bk的调整。
可选地,由于第一节点可以与n个节点通信,那么与光信号Ak和光信号Bk的频率范围相邻的其他频率范围可能被n个节点中的其他节点的光信号使用了。因此,若要对光信号Ak和/或光信号Bk进行调整,还需要考虑n个节点中的其他节点的光信号。
可选地,如果调整后的光信号Ak和/或光信号Bk不对n个节点中的其他节点的光信号造成影响,那么第一节点可以无需与n个节点中的其他节点进行交互,直接执行上述图20至图22中任一实施例对应的方法。
可选地,如果调整后的光信号Ak和/或光信号Bk会对n个节点中的其他节点的光信号造成影响(比如,调整后的光信号Ak和/或光信号Bk的频率范围与n个节点中的其他节点的光信号的频率范围重叠过多,形成干扰),那么还需要调整n个节点中的其他节点的光信号的中心频率。
作为一种可能的实现方式,假设调整后的光信号Ak和/或光信号Bk会对n个节点中的节点x的光信号Ax和/或光信号Bx造成影响,那么在开始调整光信号Ak和/或光信号Bk之前,第一节点还可以调整光信号Ax和/或光信号Bx的中心频率。其中,x为1至n的正整数,x不等于k。调整光信号Ax和/或光信号Bx的中心频率的过程与上述图20至图23中任一实施例中对光信号Ak和/或光信号Bk的调整过程相同,可以参考上述图20至图23中任一实施例的步骤。其中,调整光信号Ax和/或光信号Bx的中心频率由第一节点确定。
可选地,在步骤2003、步骤2103、步骤2203或步骤2303之前,图20、图21、图22或图23对应的方法实施例还可以包括步骤2401和步骤2402。
步骤2401、第一节点向n个节点中的节点x发送用于对光信号Ax和/或光信号Bx进行调整的第七参数,第七参数包括调整后的光信号Ax的中心频率f′Ax和/或调整后的光信号Bx的中心频率f′Bx
步骤2402、第一节点接收来自n个节点中的节点x的第十五指示信息,第十五指示信息用于指示n个节点中的节点x同意根据第七参数对光信号Ax和/或光信号Bx进行调整。
在步骤2401和步骤2402之后,第一节点还可以与n个节点中的节点x进行信令交互,实现光信号Ax和/或光信号Bx的调整,该过程与光信号Ak和/或光信号Bk的调整过程相同,此处不再赘述。
可选地,在上述图20至图23对应的实施例中,wAk<w′Ak,或者,wAk>w′Ak。wBk<w′Bk,或者,wBk>w′Bk。换言之,调制光信号Ak的带宽可以是将光信号Ak的带宽调大,也可以是将光信号Ak的带宽调小。调制光信号Bk的带宽可以是将光信号Bk的带宽调大,也可以是将光信号Bk的带宽调小。
将光信号的带宽调大可以理解为对通信带宽进行扩容,上述图20至图23对应的实施例的方法可以用于对点到多点的单纤双向通信的带宽进行扩容。
作为一种可能的实现方式,如果频域上与光信号Ak相邻的光信号之间的空闲频率范围大于或等于光信号Ak将要扩容后的带宽,那么在对光信号Ak的带宽进行扩容时,无需对光信号Ak相邻的光信号的中心频率进行调整。示例地,图24示出了一种对光信号Ak进行扩容的示意图,如图24所示,与待调整的光信号A2相邻的光信号B2和光信号A3之间的空间频率范围大于光信号A2将要扩容后的带宽w′A2。基于此,首先可以将光信号A2的中心频率由fA2调整为f′A2,使得f′A2两侧的空闲频率范围大于之后可以再将光信号A2的带宽由wA2扩容为w′A2
作为一种可能的实现方式,如果频域上与光信号Ak相邻的光信号之间的空闲频率范围小于光信号Ak将要扩容后的带宽,那么还需要对光信号Ak相邻的光信号的中心频率进行调整,以使得相邻的光信号之间的空闲频率范围不小于光信号Ak将要扩容后的带宽。并且,在调整相邻的光信号的中心频率时,如果又影响到了其他光信号,那么所以受到影响的光信号的中心频率都统一调整。可选地,在需要对光信号Ak相邻的光信号的中心频率进行调整时,可以 只调整光信号Ak一侧的光信号,也可以同时调整光信号Ak两侧的光信号,本申请不作限定。
示例地,图25示出了另一种对光信号Ak进行扩容的示意图,如图25所示,多个光信号的频率范围在频域上是连续的,与待调整的光信号A2相邻的光信号B2和光信号A3之间的空闲频率范围小于光信号A2将要扩容后的带宽w′A2。基于此,首先,可以对光信号B1、光信号A1、以及光信号B2的中心频率进行调整,使得调整后的光信号B2与光信号B3之间的空闲频率范围不小于光信号A2将要扩容后的带宽。之后,将光信号A2的中心频率由fA2调整为f′A2,使得f′A2两侧的空闲频率范围大于最后,再将光信号A2的带宽由wA2扩容为w′A2
应理解,对光信号Bk的扩容方法与对光信号Ak的扩容方法类似,此处不再举例赘述。
可以理解的是,以上各个实施例中,由第一节点实现的方法和/或步骤,也可以由可用于第一节点的部件(例如芯片或者电路)实现,由第二节点实现的方法和/或步骤,也可以由可用于第二节点的部件(例如芯片或者电路)实现。
可选地,本申请实施例还提供了通信装置,该通信装置用于实现上述各种方法。该通信装置可以为上述方法实施例中的第一节点,或者包含上述第一节点的装置,或者为可用于第一节点的部件。该通信装置还可以为上述方法实施例中的第二节点,或者包含上述第二节点的装置,或者为可用于第二节点的部件。可以理解的是,该通信装置为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法实施例中对通信装置进行功能模块的划分,例如,可以对应各个功能划分各个功能模块,也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。需要说明的是,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。
图26示出了本申请提供的一种通信装置的结构示意图,参考图26,通信装置260可以包括上述光模块50,光模块50的结构可以如图5所示,此处不再赘述。可选地,通信装置260还可以包括处理模块60。
其中,以通信装置260为上述方法实施例中的第一节点为例:
激光调制器503,可以用于向第二节点发送第一光信号,第一光信号是对激光器501发射的激光进行调制后得到的。相干接收机504,可以用于接收来自第二节点的第二光信号,激光器501用于产生相干接收机504所需的本振光。其中,第一光信号的中心频率为f1,第二光信号的中心频率为f2,f1与f2不同,|f1-f2|小于第一阈值。
可选地,激光调制器503,还可以用于向第二节点发送用于对第一光信号进行调整的第一参数。相干接收机504,还可以用于接收来自第二节点的第一指示信息,第一指示信息用于指示第二节点同意根据第一参数对第一光信号进行调整。激光调制器503,还可以用于向第二节点发送第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。处理模块60,可以用于将第一光信号的最大频带宽度调整为w′1,和/或,将第一光信号的中 心频率调整为f′1。激光调制器503,可以用于向第二节点发送第三指示信息,第三指示信息用于指示第一节点完成了对第一光信号的调整。
可选地,激光调制器503,还可以用于向第二节点发送用于对第二光信号进行调整的第二参数。相干接收机504,还可以用于接收来自第二节点的第四指示信息,第四指示信息用于指示第二节点同意根据第二参数对第二光信号进行调整。激光调制器503,还可以用于向第二节点发送第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。相干接收机504,还可以用于接收来自第二节点的第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。
可选地,激光调制器503,还可以用于向第二节点发送用于对第一光信号和第二光信号进行调整的第三参数。相干接收机504,还可以用于接收来自第二节点的第七指示信息,第七指示信息用于指示第二节点同意根据第三参数对第一光信号和第二光信号进行调整。激光调制器503,还可以用于向第二节点发送第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。处理模块60,还可以用于将第一光信号的最大频带宽度调整为w′1,和/或,将第一光信号的中心频率调整为f′1。激光调制器503,还可以向第二节点发送第三指示信息,第三指示信息用于指示第一节点完成对第一光信号的调整。激光调制器503,还可以向第二节点发送第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。相干接收机504,还可以用于接收来第二节点的第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。
可选地,激光调制器503,还可以用于向第二节点发送用于对第一光信号和第二光信号进行调整的第三参数。相干接收机504,还可以用于接收来自第二节点的第七指示信息,第七指示信息用于指示第二节点同意根据第三参数对第一光信号和第二光信号进行调整。激光调制器503,还可以用于向第二节点发送第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。相干接收机504,还可以用于接收来第二节点的第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。激光调制器503,还可以用于向第二节点发送第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。处理模块60,还可以用于将第一光信号的最大频带宽度调整为w′1,和/或,将第一光信号的中心频率调整为f′1。激光调制器503,还可以用于向第二节点发送第三指示信息,第三指示信息用于指示第一节点完成对第一光信号的调整。
其中,以通信装置260为上述方法实施例中的第二节点为例:
激光调制器503,可以用于通过第一激光调制器向第一节点发送第二光信号,第二光信号是对第二激光器发射的激光进行调制后得到的。处理模块60,可以用于通过第二相干接收机接收来自第一节点的第一光信号,第二激光器用于产生第二相干接收机所需的本振光。其中,第一光信号的中心频率为f1,第二光信号的中心频率为f2,f1与f2不同,|f1-f2|小于第一阈值。
可选地,相干接收机504,还可以用于接收来自第一节点的用于对第一光信号进行调整的第一参数。然后,激光调制器503,还可以用于向第一节点发送第一指示信息,第一指示信息用于指示第二节点同意根据第一参数对第一光信号进行调整。相干接收机504,还可以 用于接收来自第一节点的第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。激光调制器503,可以用于接收来自第一节点的第三指示信息,第三指示信息用于指示第一节点完成了对第一光信号的调整。
可选地,相干接收机504,还可以用于接收来自第一节点的用于对第二光信号进行调整的第二参数。激光调制器503,还可以用于向第一节点发送第四指示信息,第四指示信息用于指示第二节点同意根据第二参数对第二光信号进行调整。相干接收机504,还可以用于接收来自第一节点的第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。处理模块60,还可以用于将第二光信号的最大频带宽度调整为w′2,和/或,将第二光信号的中心频率调整为f′2。激光调制器503,还可以用于向第二节点发送第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。
可选地,相干接收机504,还可以用于接收来自第一节点向的用于对第一光信号和第二光信号进行调整的第三参数。激光调制器503,还可以用于向第一节点发送第七指示信息,第七指示信息用于指示第二节点同意根据第三参数对第一光信号和第二光信号进行调整。相干接收机504,还可以用于接收来自第一节点发送第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。相干接收机504,还可以用于接收来自第一节点的第三指示信息,第三指示信息用于指示第一节点完成对第一光信号的调整。激光调制器503,还可以用于向第二节点发送第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。处理模块60,还可以用于将第二光信号的最大频带宽度调整为w′2,和/或,将第二光信号的中心频率调整为f′2。最激光调制器503,还可以用于向第一节点发送第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。
可选地,相干接收机504,还可以用于接收来自第一节点向的用于对第一光信号和第二光信号进行调整的第三参数。激光调制器503,还可以用于向第一节点发送第七指示信息,第七指示信息用于指示第二节点同意根据第三参数对第一光信号和第二光信号进行调整。相干接收机504,还可以用于接收来自第一节点的第五指示信息,第五指示信息用于指示第二节点开始对第二光信号进行调整。处理模块60,还可以用于将第二光信号的最大频带宽度调整为w′2,和/或,将第二光信号的中心频率调整为f′2。另外,第二节点可以向第一节点发送第六指示信息,第六指示信息用于指示第二节点完成对第二光信号的调整。相干接收机504,还可以用于接收来自第一节点发送第二指示信息,第二指示信息用于指示第一节点开始对第一光信号进行调整。相干接收机504,还可以用于接收来自第一节点的第三指示信息,第三指示信息用于指示第一节点完成对第一光信号的调整。
需要说明的是,上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。由于本实施例提供的通信装置260可执行上述拓扑还原方法,因此其所能获得的技术效果可参考上述方法实施例,在此不再赘述。
图27示出了本申请提供的另一种通信装置,参考图27,该通信装置270可以处理器2701、总线2702和光模块50。其中,光模块50的结构可以如图5所示,此处不再赘述,处理器2701可以通过总线2702与光模块50通信。例如,处理器2701可以通过总线2702向光模块50发送信令以配置光模块50中的调制器503和相干接收机504的相关参数。可选地,总线2702可以分为地址总线、数据总线、控制总线等。
可选地,通信装置270还可以包括存储器2703,存储器2703可以用于存储信令和/或数据。例如,存储器2703可以存储用于配置光模块的参数、需要通过光模块发送的报文或者光模块接收到的报文等。
可选地,通信装置270还可以包括通信接口2704,该通信接口2704可以用于该通信装置270与其他通信装置进行数字通信。作为一种实现方式,该通信接口2704可通过接口电路来实现。
可选地,本申请中的处理器可以是中央处理单元(central processing unit,CPU)、其它通用处理器、数字信号处理器(digital signal processor,DSP)、特定应用集成电路(application-specific integrated circuit,ASIC)、或可编程逻辑器件(programmable logic device,PLD)等。其中,通用处理器可以是微处理器,也可以是任何常规的处理器。PLD可以是复杂程序逻辑器件(complex programmable logical device,CPLD)、现场可编程门阵列(field programmable gate array,FPGA)、通用阵列逻辑(generic array logic,GAL)或其任意组合。
本申请的实施例中的方法步骤也可以由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成,软件模块可以被存放于随机存取存储器(random access memory,RAM)、闪存、只读存储器(read-only memory,ROM)、可编程只读存储器(programmable ROM,PROM)、可擦除可编程只读存储器(erasable PROM,EPROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器,从而使处理器能够从该存储介质读取信息,且可向该存储介质写入信息。当然,存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外,该ASIC可以位于网络设备或终端设备中。当然,处理器和存储介质也可以作为分立组件存在于网络设备或终端设备中。
在本申请的各个实施例中,如果没有特殊说明以及逻辑冲突,不同的实施例之间的术语和/或描述具有一致性、且可以相互引用,不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
本申请中,“至少一个”是指一个或者多个,“多个”是指两个或两个以上。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B的情况,其中A,B可以是单数或者复数。在本申请的文字描述中,字符“/”,一般表示前后关联对象是一种“或”的关系;在本申请的公式中,字符“/”,表示前后关联对象是一种“相除”的关系。
可以理解的是,在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分,并不用来限制本申请的实施例的范围。上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定。

Claims (23)

  1. 一种单纤双向通信方法,其特征在于,应用于第一节点,所述第一节点包括第一光模块,所述第一光模块包括第一激光器,第一连接单元,第一相干接收机、第一激光调制器和第二连接单元;其中,所述第一激光器通过所述第一连接单元分别与所述第一激光调制器和所述第一相干接收机连接,所述第一相干接收机和所述第一激光调制器通过第二连接单元与同一根光纤连接;所述方法包括:
    所述第一节点通过所述第一激光调制器向第二节点发送第一光信号,所述第一光信号是对所述第一激光器发射的激光进行调制后得到的;
    所述第一节点通过所述第一相干接收机接收来自所述第二节点的第二光信号,所述第一激光器用于产生所述第一相干接收机所需的本振光;
    其中,所述第一光信号的中心频率为f1,所述第二光信号的中心频率为f2,f1与f2不同,|f1-f2|小于第一阈值。
  2. 根据权利要求1所述的方法,其特征在于,所述第一光信号的频率范围与所述第二光信号的频率范围不重复或部分重复。
  3. 根据权利要求2所述的方法,其特征在于,w1为所述第一光信号的最大频带宽度,w2为所述第二光信号的最大频带宽度。
  4. 根据权利要求1-3任一项所述的方法,其特征在于,若所述第一激光器的输出频率为f3,则或者,其中,w1为所述第一光信号的最大频带宽度,w2为所述第二光信号的最大频带宽度。
  5. 根据权利要求1-4任一项所述的方法,其特征在于,若所述第一激光器的输出频率为f3,所述第一相干接收机接收所述第二光信号的频率范围为(f3-Δx)至f3和f3至(f3+Δx),w2为所述第二信号的最大频带宽度。
  6. 根据权利要求1-5任一项所述的方法,其特征在于,所述方法还包括:
    所述第一节点向所述第二节点发送用于对所述第一光信号进行调整的第一参数;
    所述第一节点接收来自所述第二节点的第一指示信息,所述第一指示信息用于指示所述第二节点同意根据所述第一参数对所述第一光信号进行调整;
    所述第一节点向所述第二节点发送第二指示信息,所述第二指示信息用于指示所述第一节点开始对所述第一光信号进行调整;
    所述第一节点将所述第一光信号的最大频带宽度调整为w′1,和/或,将所述第一光信号的中心频率调整为f′1
    所述第一节点向所述第二节点发送第三指示信息,所述第三指示信息用于指示所述第一节点完成了对所述第一光信号的调整。
  7. 根据权利要求1-5任一项所述的方法,其特征在于,所述方法还包括:
    所述第一节点向所述第二节点发送用于对所述第二光信号进行调整的第二参数;
    所述第一节点接收来自所述第二节点的第四指示信息,所述第四指示信息用于指示所述第二节点同意根据所述第二参数对所述第二光信号进行调整;
    所述第一节点向所述第二节点发送第五指示信息,所述第五指示信息用于指示所述第二节点开始对所述第二光信号进行调整;
    所述第一节点接收来自所述第二节点的第六指示信息,所述第六指示信息用于指示所述 第二节点完成对所述第二光信号的调整。
  8. 根据权利要求1-5任一项所述的方法,其特征在于,所述方法还包括:
    所述第一节点向所述第二节点发送用于对所述第一光信号和所述第二光信号进行调整的第三参数;
    所述第一节点接收来自所述第二节点的第七指示信息,所述第七指示信息用于指示所述第二节点同意根据所述第三参数对所述第一光信号和所述第二光信号进行调整;
    所述第一节点向所述第二节点发送第二指示信息,所述第二指示信息用于指示所述第一节点开始对所述第一光信号进行调整;
    所述第一节点将所述第一光信号的最大频带宽度调整为w′1,和/或,将所述第一光信号的中心频率调整为f′1
    所述第一节点向所述第二节点发送第三指示信息,所述第三指示信息用于指示所述第一节点完成对所述第一光信号的调整;
    所述第一节点向所述第二节点发送第五指示信息,所述第五指示信息用于指示所述第二节点开始对所述第二光信号进行调整;
    所述第一节点接收来所述第二节点的第六指示信息,所述第六指示信息用于指示所述第二节点完成对所述第二光信号的调整。
  9. 根据权利要求1-5任一项所述的方法,其特征在于,所述方法还包括:
    所述第一节点向所述第二节点发送用于对所述第一光信号和所述第二光信号进行调整的第三参数;
    所述第一节点接收来自所述第二节点的第七指示信息,所述第七指示信息用于指示所述第二节点同意根据所述第三参数对所述第一光信号和所述第二光信号进行调整;
    所述第一节点向所述第二节点发送第五指示信息,所述第五指示信息用于指示所述第二节点开始对所述第二光信号进行调整;
    所述第一节点接收来所述第二节点的第六指示信息,所述第六指示信息用于指示所述第二节点完成对所述第二光信号的调整;
    所述第一节点向所述第二节点发送第二指示信息,所述第二指示信息用于指示所述第一节点开始对所述第一光信号进行调整;
    所述第一节点将所述第一光信号的最大频带宽度调整为w′1,和/或,将所述第一光信号的中心频率调整为f′1
    所述第一节点向所述第二节点发送第三指示信息,所述第三指示信息用于指示所述第一节点完成对所述第一光信号的调整。
  10. 根据权利要求1-5任一项所述的方法,其特征在于,所述第一节点通过所述第一光模块与n个节点进行通信;n≥2;
    在所述第二节点为所述n个节点中的第k个节点的情况下,f1=fAk,f2=fBk;其中,fAk为所述第一节点向所述n个节点中的第k个节点发送的光信号Ak的中心频率,fBk为所述第k个节点向所述第一节点发送的光信号Bk的中心频率,k为1至n的正整数。
  11. 根据权利要求9或10所述的方法,其特征在于,在k>1的情况下,fAk>fA(k-1),fAk>fB(k-1),fBk>fA(k-1),fBk>fB(k-1);若k为奇数,fAk<fBk,若k为偶数,fBk<fAk
    或者,在k>1的情况下,fAk>fA(k-1),fAk>fB(k-1),fBk>fA(k-1),fBk>fB(k-1);若k为奇数,fBk<fAk,若k为偶数,fAk<fBk
  12. 根据权利要求10或11所述的方法,其特征在于,所述方法还包括:
    所述第一节点向所述n个节点中的第k个节点发送用于对所述光信号Ak进行调整的第四参数;
    所述第一节点接收来自所述n个节点中的第k个节点的第八指示信息,所述第八指示信息用于指示所述n个节点中的第k个节点同意根据所述第四参数对所述光信号Ak进行调整;
    所述第一节点向所述n个节点中的第k个节点发送第九指示信息,所述第九指示信息用于指示所述第一节点开始对所述光信号Ak进行调整;
    所述第一节点将所述光信号Ak的最大频带宽度调整为w′Ak,和/或,将所述光信号Ak的中心频率调整为f′Ak
    所述第一节点向所述n个节点中的第k个节点发送第十指示信息,所述第十指示信息用于指示所述第一节点完成对所述光信号Ak的调整。
  13. 根据权利要求10或11所述的方法,其特征在于,所述方法还包括:
    所述第一节点向所述n个节点中的第k个节点发送用于对所述光信号Bk进行调整的第五参数;
    所述第一节点接收来自所述n个节点中的第k个节点的第十一指示信息,所述第十一指示信息用于指示所述n个节点中的第k个节点同意根据所述第五参数对所述光信号Bk进行调整;
    所述第一节点向所述n个节点中的第k个节点发送第十二指示信息,所述十二指示信息用于指示所述n个节点中的第k个节点开始对所述光信号Bk进行调整;
    所述第一节点接收来自所述n个节点中的第k个节点的第十三指示信息,所述第十三指示信息用于指示所述n个节点中的第k个节点完成对所述光信号Bk的调整。
  14. 根据权利要求10或11所述的方法,其特征在于,所述方法还包括:
    所述第一节点向所述n个节点中的第k个节点发送用于对所述光信号Ak和所述光信号Bk进行调整的第六参数;
    所述第一节点接收来自所述n个节点中的第k个节点的第十四指示信息,所述第十四指示信息用于指示所述n个节点中的第k个节点同意根据所述第六参数对所述光信号Ak和所述光信号Bk进行调整;
    所述第一节点向所述n个节点中的第k个节点发送第九指示信息示,所述第九指示信息用于指示所述第一节点开始对所述光信号Ak进行调整;
    所述第一节点将所述光信号Ak的最大频带宽度调整为w′Ak,和/或,将所述光信号Ak的中心频率调整为f′Ak
    所述第一节点向所述n个节点中的第k个节点发送第十指示信息,所述第十指示信息用于指示所述第一节点完成对所述光信号Ak的调整;
    所述第一节点向所述n个节点中的第k个节点发送第十二指示信息,所述第十二指示信息用于指示所述n个节点中的第k个节点开始对所述光信号Bk进行调整;
    所述第一节点接收来所述n个节点中的第k个节点的第十三指示信息,所述第十三指示信息用于指示所述n个节点中的第k个节点完成对所述光信号Bk的调整。
  15. 根据权利要求10或11所述的方法,其特征在于,所述方法还包括:
    所述第一节点向所述n个节点中的第k个节点发送用于对所述光信号Ak和所述光信号Bk进行调整的第六参数;
    所述第一节点接收来自所述n个节点中的第k个节点的第十四指示信息,所述第十四指示信息用于指示所述n个节点中的第k个节点同意根据所述第六参数对所述光信号Ak和所述光信号Bk进行调整;
    所述第一节点向所述n个节点中的第k个节点发送第十二指示信息,所述第十二指示信息用于指示所述n个节点中的第k个节点开始对所述光信号Bk进行调整;
    所述第一节点接收来所述n个节点中的第k个节点的第十三指示信息,所述第十三指示信息用于指示所述n个节点中的第k个节点完成对所述光信号Bk的调整;
    所述第一节点向所述n个节点中的第k个节点发送第九指示信息,所述第九指示信息用于指示所述第一节点开始对所述光信号Ak进行调整;
    所述第一节点将所述光信号Ak的最大频带宽度调整为w′Ak,和/或,将所述光信号Ak的中心频率调整为f′Ak
    所述第一节点向所述n个节点中的第k个节点发送第十指示信息,所述第十指示信息用于指示所述第一节点完成对所述光信号Ak的调整。
  16. 根据权利要求12或14所述的方法,其特征在于,在所述第一节点向所述n个节点中的第k个节点发送第九指示信息之前,所述方法还包括:
    所述第一节点向所述n个节点中的节点x发送用于对光信号Ax和/或光信号Bx进行调整的第七参数,所述第七参数包括调整后的光信号A的中心频率f′Ax和/或调整后的光信号Bx的中心频率f′Bx;x为1至n的正整数,x不等于k;
    所述第一节点接收来自所述n个节点中的节点x的第十五指示信息,所述第十五指示信息用于指示所述n个节点中的节点x同意根据所述第七参数对所述光信号Ax和/或所述光信号Bx进行调整。
  17. 根据权利要求13或15所述的方法,其特征在于,在所述第一节点向所述n个节点中的第k个节点发送第十二指示信息之前,所述方法还包括:
    所述第一节点向所述n个节点中的节点x发送用于对光信号Ax和/或光信号Bx进行调整的第七参数,所述第七参数包括调整后的光信号A的中心频率f′Ax和/或调整后的光信号Bx的中心频率f′Bx;x为1至n的正整数,x不等于k;
    所述第一节点接收来自所述n个节点中的节点x的第十五指示信息,所述第十五指示信息用于指示所述n个节点中的节点x同意根据所述第七参数对所述光信号Ax和/或所述光信号Bx进行调整。
  18. 一种单纤双向通信方法,其特征在于,应用于第二节点,所述第二节点包括第二光模块,所述第二光模块包括第二激光器,第三连接单元,第二相干接收机、第二激光调制器和第四连接单元;其中,所述第二激光器通过所述第三连接单元分别与所述第二激光调制器和所述第二相干接收机连接,所述第二相干接收机和所述第二激光调制器通过第四连接单元与同一根光纤连接;所述方法包括:
    所述第二节点通过所述第一激光调制器向第一节点发送第二光信号,所述第二光信号是对所述第二激光器发射的激光进行调制后得到的;
    所述第二节点通过所述第二相干接收机接收来自所述第一节点的第一光信号,所述第二激光器用于产生所述第二相干接收机所需的本振光;
    其中,所述第一光信号的中心频率为f1,所述第二光信号的中心频率为f2,f1与f2不同,|f1-f2|小于第一阈值。
  19. 根据权利要求18所述的方法,其特征在于,若所述第二激光器的输出频率为f4,则或者,其中,w1为所述第一光信号的最大频带宽度,w2为所述第二光信号的最大频带宽度。
  20. 根据权利要求18或19所述的方法,其特征在于,若所述第一激光器的输出频率为f3,所述第一相干接收机接收所述第二光信号的频率范围为(f4-Δy)至f4和f4至(f4+Δy),w1为所述第一信号的最大频带宽度。
  21. 一种通信装置,其特征在于,所述通信装置包括第一光模块,所述第一光模块包括第一激光器,第一连接单元,第一相干接收机、第一激光调制器和第二连接单元;其中,所述第一激光器通过所述第一连接单元分别与所述第一激光调制器和所述第一相干接收机连接,所述第一相干接收机和所述第一激光调制器通过第二连接单元与同一根光纤连接;
    所述通信装置用于执行权利要求1-17中任一项所述的方法。
  22. 一种通信装置,其特征在于,所述通信装置包括第二光模块,所述第二光模块包括第二激光器,第三连接单元,第二相干接收机、第二激光调制器和第四连接单元;其中,所述第二激光器通过所述第三连接单元分别与所述第二激光调制器和所述第二相干接收机连接,所述第二相干接收机和所述第二激光调制器通过第四连接单元与同一根光纤连接;
    所述通信装置用于执行权利要求18-20中任一项所述的方法。
  23. 一种计算机可读存储介质,其特征在于,其上存储有计算机程序,当所述计算机程序被处理器执行时,实现权利要求1至17中任一项所述的方法,或者,权利要求18至20中任一项所述的方法。
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110868258A (zh) * 2018-08-27 2020-03-06 中兴通讯股份有限公司 一种相干检测的实现装置、系统及方法
US20200137468A1 (en) * 2017-06-27 2020-04-30 Xieon Nextworks S.à.r.l. Data Transmission Method and Transceiver Facilitating the Switching of Frequency Bands for Optical Channels
CN111224719A (zh) * 2020-03-03 2020-06-02 Ut斯达康通讯有限公司 一种相干光通信装置及单纤双向双波长传输方法
CN113055097A (zh) * 2019-12-27 2021-06-29 中兴通讯股份有限公司 相干接收方法、信号处理方法和系统
WO2022054166A1 (ja) * 2020-09-09 2022-03-17 日本電信電話株式会社 光送信器及び光送信における周波数制御方法
CN114337820A (zh) * 2020-09-29 2022-04-12 华为技术有限公司 单纤双向光传输装置、波分设备及光传输系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200137468A1 (en) * 2017-06-27 2020-04-30 Xieon Nextworks S.à.r.l. Data Transmission Method and Transceiver Facilitating the Switching of Frequency Bands for Optical Channels
CN110868258A (zh) * 2018-08-27 2020-03-06 中兴通讯股份有限公司 一种相干检测的实现装置、系统及方法
CN113055097A (zh) * 2019-12-27 2021-06-29 中兴通讯股份有限公司 相干接收方法、信号处理方法和系统
CN111224719A (zh) * 2020-03-03 2020-06-02 Ut斯达康通讯有限公司 一种相干光通信装置及单纤双向双波长传输方法
WO2022054166A1 (ja) * 2020-09-09 2022-03-17 日本電信電話株式会社 光送信器及び光送信における周波数制御方法
CN114337820A (zh) * 2020-09-29 2022-04-12 华为技术有限公司 单纤双向光传输装置、波分设备及光传输系统

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