WO2012106939A1 - High speed optical transmission system, device and data processing method - Google Patents

Abstract

The present invention relates to a parameter configuration method in a high speed optical transmission system. The method includes: a control unit of a transmitter receives a first external command and configures the modulation format of a data processing unit according to the first external command; the control unit of the receiver receives a second external command and recovers the demodulation format of a data recovery unit according to the second external command. A high speed optical transmission system, and a transmitter and a receiver for the high speed optical transmission system are also provided in embodiments of the present invention. Because the invention can be used for long-distance or short-distance transmission, in metro areas and other settings, and with various signal speeds, network structure implementation costs are reduced.

Description

 High-speed optical transmission system, device and data processing method

Technical field

Embodiments of the present invention relate to the field of high-speed optical transmission technologies, and in particular, to a high-speed optical transmission system, device, and data processing method.

Background of the invention

At present, high-speed optical transmission communication networks have multiple signal rates and multiple application scenarios, and the same signal rate (eg, 40G) Bit) There are a variety of modulation formats available, and the modulation formats used for different signal rates and different application scenarios are also different. For example, in a long-distance, 100G transmission system, PM-QPSK (Polarization) can be used. Multiplexing-Quadrature Phase Shift Keying, polarization multiplexing-quadrature phase shift keying) modulation format; PM-QPSK modulation, DQPSK (Differential) in long-haul 40G transmission system Quadrature Phase Shift Keying, Differential Quadrature Shift Keying) Modulation, DPSK (Differential Phase Shift) Keying, differential phase shift keying) modulation, ODB (Optical Duo-Binary, optical binary modulation, and other modulation formats are available; in short-range (or metropolitan) 100G transmission systems, there is PM-OFDM (Polarization). Multiplexing-Orthogonal Frequency Division Multiplexing, polarization multiplexing-orthogonal frequency division multiplexing) modulation, xQAM (x-Quadrature Amplitude) Modulation, x-channel quadrature amplitude modulation) and other modulation formats can be used; in short-range (or metro) 400G/1T transmission systems, 1SC-QPSK can be used (1 Sub-Carrier- Quadrature Phase Shift Keying, quadrature phase shift keying for subcarriers.

In a high-speed optical transmission communication network, multiple modulation formats coexist and are not uniform, and systems with different modulation formats are difficult to communicate with each other; and different modulation formats are implemented by different devices, resulting in system hardware cost structure dispersion and system architecture implementation. The cost is high; and the system lacks flexibility.

Summary of the invention

The embodiment of the invention provides a high-speed optical transmission system, a device and a data processing method, thereby solving the problem of high implementation cost and poor flexibility of the system hardware.

The object of the invention is achieved by the following technical solutions:

A data processing method for a transmitter in a high-speed optical transmission system, when the parameters of the transmitter need to be adjusted, the method includes:

The control unit of the transmitter receives the first external command;

The control unit configures a modulation format of the data processing unit of the transmitter according to the received first external command;

The data processing unit modulates a signal to be transmitted according to a modulation format configured by the control unit.

A data processing method for a receiver in a high-speed optical transmission system, when the parameters of the receiver need to be adjusted, the method includes:

The control unit of the receiver receives a second external command;

The control unit configures a demodulation format of the data recovery unit of the receiver according to the received second external command;

The data recovery unit performs demodulation processing on the input signal according to a demodulation format configured by the control unit.

A transmitter in a high speed optical transmission system, comprising:

Control unit and data processing unit;

When the parameter of the transmitter needs to be adjusted, the control unit is configured to receive a first external command, and configure a modulation format of the data processing unit according to the first external command;

The data processing unit is configured to modulate a signal to be transmitted according to a modulation format configured by the control unit.

A receiver in a high speed optical transmission system, comprising:

Control unit, data recovery unit;

When the parameter of the receiver needs to be adjusted, the control unit is configured to receive a second external command, and configure a demodulation format of the data recovery unit according to the second external command;

The data recovery unit is configured to demodulate the input signal according to a demodulation format configured by the control unit.

A high speed optical transmission system comprising:

a transmitter and receiver connected by a fiber optic link;

The transmitter is configured to receive a first external command by the control unit, and configure a modulation format of the data processing unit according to the first external command, and perform modulation processing on the signal to be transmitted according to the configured modulation format by the data processing unit;

The receiver is configured to receive a second external command by the control unit, and configure a demodulation format of the data recovery unit according to the second external command, and perform, by using the data recovery unit, the input signal according to the configured demodulation format. Demodulation processing.

It can be seen from the technical solution provided by the foregoing embodiments of the present invention that in the embodiment of the present invention, the transmitter/receiver can adjust the modulation format according to the received external command. It can be flexibly applied to different transmission distances, different signal rates, and mixed transmission of multiple signal rates without hardware changes or upgrades, making the configuration and adjustment of the modulation format of the network more flexible and implementing the device. The normalization reduces the implementation cost of the network architecture.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief description of the drawings used in the description of the embodiments will be briefly made. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a flowchart of a method for processing data of a transmitter according to an embodiment of the present invention;

2 is a flowchart of a receiver data processing method according to an embodiment of the present invention;

3 is a schematic structural diagram of a transmitter according to an embodiment of the present invention;

4 is a schematic structural diagram of a receiver according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a system according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another system according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a first transmitter according to Embodiment 1 of the present application;

FIG. 8 is a schematic structural diagram of a second transmitter according to Embodiment 1 of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a third transmitter according to Embodiment 1 of the present application;

10 is a schematic structural diagram of a receiver according to Embodiment 2 of the present application;

11 is a schematic structural diagram of a receiver according to Embodiment 3 of the present application;

FIG. 12 is a schematic structural diagram of a receiver according to Embodiment 4 of the present invention.

Mode for carrying out the invention

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention provides a data processing method for a transmitter in a high-speed optical transmission system, and the implementation manner thereof is as shown in FIG. 1 , and specifically includes the following operations:

When it is necessary to adjust the parameters of the transmitter,

S101. The control unit of the transmitter receives the first external command.

S102. The control unit configures, according to the received first external command, a modulation format of a data processing unit of the transmitter.

S103. The data processing unit modulates a signal to be transmitted according to a modulation format configured by the control unit.

The first external command may be delivered by a communication system having a management control function, such as a network management system or a control system, and the external command may be delivered through an existing control protocol (such as a universal multi-protocol label switching protocol). It can also be set by the user and delivered via the command line using a computer device.

The method provided by the embodiment of the invention realizes flexible adjustment of the modulation format of the transmitter, thereby being able to adapt to different application scenarios and improving the application flexibility of the transmitter.

In the method provided by the embodiment of the present invention, the control unit may further configure a spectrum width of the data processing unit of the transmitter according to the received first external command.

In addition, the control unit may further configure parameters of the data channel of the data processing unit, the number of subcarriers, the source output power of the transmitter, the wavelength working range, and the like according to the received first external command.

In the method provided by the foregoing embodiment of the present invention, the first external command may be a configuration parameter, where the configuration parameter includes: a modulation format. Optionally, the configuration parameter may further include at least one of the following: a spectrum width, a number of data channels, a number of subcarriers, a source output power, a wavelength working range, and the like. Correspondingly, the foregoing control unit may specifically configure a modulation format of a data processing unit of the transmitter according to a modulation format carried in the first external command. If the configuration parameter carried in the first external command further includes a spectrum width, the control unit further configures a spectrum width of the data processing unit of the transmitter according to a spectrum width carried in the first external command; if the first external command carries The configuration parameter further includes the number of data channels, and the control unit further configures the number of data channels of the data processing unit of the transmitter according to the number of data channels carried in the first external command; if the configuration parameter carried in the first external command further includes The number of carriers, the control unit further configures the number of subcarriers of the data processing unit of the transmitter according to the number of subcarriers carried in the first external command; if the configuration parameter carried in the first external command further includes the output of the light source The control unit further configures the light source output power of the data processing unit of the transmitter according to the output power of the light source carried in the first external command; if the configuration parameter carried in the first external command further includes a wavelength working range, the control unit further According to the wavelength working in the first external command Work wavelength range data processing unit configured of a transmitter.

In the method provided by the foregoing embodiment of the present invention, the first external command may also be at least one of the following reference parameters: transmission distance, fiber type, signal rate, and channel quality; correspondingly, the foregoing control unit receives the received The implementation manner of the first external command to configure the modulation format of the data processing unit of the transmitter may include: the control unit matching the reference parameter carried in the received first external command with the pre-saved parameter correspondence, selecting and a modulation format corresponding to the reference parameter carried in the first external command, and configuring a modulation format of the data processing unit of the transmitter according to the selected modulation format. Optionally, the control unit may further match the reference parameter carried in the received first external command with the pre-stored parameter correspondence, and select a spectrum width and data corresponding to the reference parameter carried in the first external command. The configuration parameters of the transmitter, such as the number of channels, the number of subcarriers, the source output power of the transmitter, and/or the wavelength operating range, are configured according to the selected configuration parameters of the transmitter. The parameter correspondence describes the correspondence between the reference parameters and the configuration parameters.

By way of example and not limitation, the following describes the effect of reference parameters on configuration parameters:

Transmission distance: The fiber transmission distance between the transmitter and the receiver is different. The spectrum width occupied by the transmitter in the fiber channel, the modulation mode used, the wavelength working range, and the source output power of the transmitter are also different.

Fiber Type: PMD (Polarization Mode) for different types of fiber Dispersion, Polarization Mode Dispersion Coefficient and CD (Chromatic Dispersion, chromatic dispersion has different coefficients, and the requirements for the output power of the light source and the operating range of the wavelength are also different.

Signal Rate: In the case of Multiple Subcarrier Multiplexing (OFDM), the number of subcarriers, the number of data channels, and the wavelength operating range required for different signal rates are also different.

Channel quality: When the channel quality changes, parameters such as modulation format, spectrum width, and number of subcarriers need to be adjusted to ensure signal transmission quality. When the channel quality is degraded, the spectrum width can be increased, the number of subcarriers can be increased, or a higher order modulation format can be selected. The channel quality can be, but is not limited to, the following parameters: Optical Power (optical power, refers to the actual optical power of the detected system), Qfactor (Q factor), BER (Bit Error) Ratio, bit error rate, OSNR (Optical Signal Noise Ratio), etc.

 In the application process, the correspondence between the reference parameters and the configuration parameters can be configured according to the actual requirements of the communication system.

In the method provided by the embodiment of the present invention, the first external command may further carry the configuration parameter and the reference parameter, and the transmitter directly configures the configuration parameter of the corresponding transmitter according to the configuration parameter in the first external command, according to The reference parameter in the first external command is configured by selecting the configuration parameter of the transmitter that matches the reference parameter.

The embodiment of the present invention further provides a data processing method for a receiver in a high-speed optical transmission system, and the implementation manner thereof is as shown in FIG. 2, and specifically includes the following operations:

When it is necessary to adjust the parameters of the receiver,

S201. The control unit of the receiver receives a second external command.

S202. The control unit of the receiver configures a demodulation format of the data recovery unit of the receiver according to the received second external command.

S203. The data recovery unit demodulates the input signal according to a demodulation format configured by the control unit of the receiver.

The second external command may be delivered by a communication system having a management control function, such as a network management system or a control system, and the external command may be delivered through an existing control protocol (such as a general multi-protocol label switching protocol). It can also be set by the user and sent by the computer device through the command line.

The method provided by the embodiment of the invention realizes flexible adjustment of the demodulation format of the receiver, so as to be able to adapt to different application scenarios and improve the application flexibility of the receiver.

In the method provided by the embodiment of the present invention, the control unit of the receiver may further configure a spectrum width of the data recovery unit of the receiver according to the received second external command.

In addition, the control unit of the receiver may further configure parameters of the data channel, the number of subcarriers, the source output power of the receiver, the wavelength working range, and the like of the data recovery unit according to the received second external command.

In the method provided by the embodiment of the present invention, the second external command may be a configuration parameter, where the configuration parameter includes: a modulation format. Optionally, the configuration parameter may further include at least one of the following: a spectrum width, a number of data channels, a number of subcarriers, a source output power, a wavelength working range, and the like. Correspondingly, the control unit of the receiver may specifically configure a demodulation format of the data recovery unit of the receiver according to a modulation format carried in the second external command. Since the demodulation process is the inverse of the modulation process, after knowing the modulation format of the transmitter, the receiver can determine the corresponding demodulation format. If the configuration parameter carried in the second external command further includes a spectrum width, the control unit of the receiver further configures a spectrum width of the data recovery unit of the receiver according to a spectrum width carried in the second external command; if the second external command carries The configuration parameter further includes the number of data channels, and the control unit of the receiver further configures the number of data channels of the data recovery unit of the receiver according to the number of data channels carried in the second external command; if the configuration carried in the second external command The parameter further includes the number of subcarriers, and the control unit of the receiver further configures the number of subcarriers of the data recovery unit of the receiver according to the number of subcarriers carried in the second external command; if the second external command carries The configuration parameter further includes a light source output power, and the control unit of the receiver further configures a light source output power of the data recovery unit of the receiver according to the output power of the light source carried in the second external command; if the configuration parameter carried in the second external command is Also includes a wavelength operating range, and the control unit of the above receiver is also According to the working wavelength range of the second wavelength external command carries power data recovery unit of the receiver to be configured.

In the method provided by the embodiment of the present invention, the configuration parameter carried in the second external command may further include a demodulation format. Correspondingly, the control unit of the receiver may specifically configure the demodulation format of the data recovery unit of the receiver according to the demodulation format carried in the second external command.

In the method provided by the embodiment of the present invention, the second external command may further be at least one of the following reference parameters: a transmission distance, an optical fiber type, a signal rate, and a channel quality; and correspondingly, the control unit of the receiver is configured according to the foregoing The received demodulation format of the second external command configuration data recovery unit includes: the control unit of the receiver matches the received second external command with a pre-saved parameter correspondence, and the selection and the second external command are carried. The demodulation format corresponding to the reference parameter configures the demodulation format of the receiver according to the selected demodulation format. Optionally, the received second external command is matched with the pre-stored parameter correspondence, and the spectrum width, the number of data channels, the number of subcarriers, and the number of subcarriers corresponding to the reference parameters carried in the second external command are selected. The configuration parameters of the receiver such as the source output power of the receiver and/or the operating range of the wavelength, and the corresponding parameters of the receiver are configured according to the configuration parameters of the selected receiver. The parameter correspondence describes the correspondence between the reference parameters and the configuration parameters.

In the method provided by the embodiment of the present invention, the second external command may further carry the configuration parameter and the reference parameter, and the receiver directly configures the configuration parameter of the corresponding receiver according to the configuration parameter in the second external command, according to The reference parameter in the second external command is configured by selecting a configuration parameter of the receiver that matches the reference parameter.

The embodiment of the present invention further provides a transmitter in a high-speed optical transmission system, and the structure thereof is as shown in FIG. 3. The specific implementation structure includes: a control unit 3001 and a data processing unit 3002. among them:

When the parameters of the transmitter need to be adjusted, the control unit 3001 is configured to receive a first external command, and configure a modulation format of the data processing unit 3002 according to the first external command;

The first external command may be delivered by a communication system having a management control function, such as a network management system or a control system, and the external command may be delivered through an existing control protocol (for example, a general multi-protocol label switching protocol), and the external command is also sent. It can be set by the user and sent through the command line using a computer device.

The data processing unit 3002 is configured to modulate the signal to be transmitted according to the modulation format configured by the control unit 3002.

The transmitter provided by the embodiment of the present invention can adjust the modulation format through the software configuration of the control unit, thereby adapting to different application scenarios. The transmitters of different embodiments of the present invention require transmitters of different hardware structures. The transmitter provided by the embodiments of the present invention reduces hardware implementation costs. In addition, the transmitter provided by the embodiment of the present invention can realize the modulation format adjustable by software control, the configuration mode is flexible, and the online upgrade can be implemented.

If the configuration parameter of the modulation unit is included in the first external command, the control unit 3001 may be configured to: obtain a modulation format in the first external command, and configure a modulation format of the data processing unit 3002 according to the acquired modulation format. . Optionally, the configuration parameter carried in the first external command may further include at least one of the following: a spectrum width, a number of data channels, a number of subcarriers, a source output power, a wavelength working range, and the like. Correspondingly, the control unit 3001 is further configured to: if the configuration parameter carried by the first external command includes a spectrum width, acquire a spectrum width in the first external command, and configure a spectrum width of the data processing unit 3002 according to the acquired spectrum width. If the configuration parameter carried in the first external command includes the number of data channels, obtain the number of data channels in the first external command, and configure the number of data channels of the data processing unit 3002 according to the obtained number of data channels; if the first external command If the number of subcarriers is included in the configuration parameter, the number of subcarriers in the first external command is obtained, and the number of subcarriers in the data processing unit 3002 is configured according to the number of acquired subcarriers; if the first external command is used, The configuration parameter carried in the light source output power, the light source output power in the first external command is obtained, and the light source output power of the data processing unit 3002 is configured according to the obtained light source output power; if the configuration parameter carried in the first external command includes the wavelength The working range, the wavelength working range in the first external command is obtained, Configuring wavelength of the operating range of the data processing unit 3002 according to the wavelength operating range acquired.

If the first external command carries the following at least one of the following reference parameters: a transmission distance, a fiber type, a signal rate, and a channel quality, the control unit 3001 specifically includes:

The external command receiving subunit 30011 is configured to receive a first external command, where the first external command carries at least one of the following reference parameters: a transmission distance, a fiber type, a signal rate, and a channel quality;

The configuration parameter determining sub-unit 30012 is configured to match the reference parameter carried in the first external command with the pre-saved parameter correspondence, so as to select a modulation format corresponding to the reference parameter carried in the first external command; The configuration parameter determining sub-unit 30012 is further configured to: match the reference parameter carried in the received first external command with the pre-saved parameter correspondence, and select a spectrum width corresponding to the reference parameter carried in the first external command. Configuration parameters of the transmitter, the number of data channels, the number of subcarriers, the source output power of the transmitter, and/or the wavelength operating range;

The corresponding relationship of the parameter may be manually configured by the operator, or may be delivered by the network management system or the control system.

The configuration execution sub-unit 30013 is configured to configure the modulation format of the data processing unit 3002 according to the selected modulation format. Optionally, the configuration execution sub-unit 30013 may be further configured to determine, according to the configuration parameter, the selected transmission by the sub-unit 30012. The configuration parameters of the machine configure corresponding parameters of the data processing unit 3002.

The embodiment of the present invention further provides a receiver in a high-speed optical transmission system, and the structure thereof is as shown in FIG. 4 . The specific implementation structure includes: a control unit 4001 and a data recovery unit 3004. among them:

When the parameters of the receiver need to be adjusted, the control unit 4001 is configured to receive a second external command, and configure a demodulation format of the data recovery unit 4002 according to the second external command;

The second external command may be delivered by a communication system having a management control function, such as a network management system or a control system, and the external command may be delivered through an existing control protocol (for example, a general multi-protocol label switching protocol). It can be set by the user and sent through the command line using a computer device.

The data recovery unit 4002 is configured to demodulate the input signal according to the demodulation format configured by the control unit 4001.

The receiver provided by the embodiment of the present invention can adjust the modulation format through the control unit to adapt to different application scenarios. The receiver provided by the embodiment of the present invention can adapt to different application scenarios, and different application scenarios than the prior art require receivers with different hardware structures, which reduces the hardware implementation cost. In addition, the receiver provided by the embodiment of the present invention can realize the switching of the demodulation format through software control, and the configuration manner is flexible, and the online upgrade can be implemented.

If the second external command carries the configuration parameter including the modulation format, the working mode of the control unit 4001 may be: acquiring the modulation format in the second external command, and configuring the solution of the data recovery unit 4002 according to the acquired modulation format. Optionally, the configuration parameter carried in the second external command may further include at least one of the following: a spectrum width, a number of data channels, a number of subcarriers, a source output power, a wavelength working range, and the like. Correspondingly, the control unit 4001 is further configured to: if the configuration parameter carried by the second external command includes a spectrum width, acquire a spectrum width in the second external command, and configure a spectrum width of the data recovery unit 4002 according to the acquired spectrum width. If the configuration parameter carried in the second external command includes the number of data channels, obtain the number of data channels in the second external command, and configure the number of data channels of the data recovery unit 4002 according to the obtained number of data channels; if the second external command If the number of subcarriers is included in the configuration parameter carried in the second external command, the number of subcarriers in the second external command is obtained, and the number of subcarriers in the data recovery unit 4002 is configured according to the obtained number of subcarriers; The carried configuration parameter includes the light source output power, the light source output power in the second external command is obtained, and the light source output power of the data recovery unit 4002 is configured according to the obtained light source output power; if the configuration parameter carried in the second external command includes the wavelength The working range, the wavelength working range in the second external command is obtained, Configuration data recovery unit operating at a wavelength range of 4002 according to the wavelength operating range acquired.

The configuration parameter carried in the second external command may further include a demodulation format instead of a modulation format, and the working mode of the control unit 4001 may specifically obtain a demodulation format in the second external command, and configure according to the obtained demodulation format. The demodulation format of the data recovery unit 4002.

If the second external command carries the following at least one of the following reference parameters: a transmission distance, a fiber type, a signal rate, and a channel quality, the control unit 4001 specifically includes:

The external command receiving subunit 40011 is configured to receive the foregoing second external command, where the second external command carries at least one of the following reference parameters: a transmission distance, a fiber type, a signal rate, and a channel quality;

a configuration parameter determining sub-unit 40012, configured to match a reference parameter carried in the second external command with a pre-saved parameter correspondence, thereby selecting a demodulation format corresponding to the reference parameter carried in the second external command; Optionally, the configuration parameter determining sub-unit 40012 is further configured to: match the reference parameter carried in the received second external command with the pre-saved parameter correspondence, and select the reference parameter carried in the second external command. Configuration parameters of the receiver such as the corresponding spectrum width, number of data channels, number of subcarriers, source output power of the receiver, and/or wavelength operating range;

The corresponding relationship of the parameter may be manually configured by an operator, or may be delivered by a network management system or a control system;

The configuration execution subunit 40013 is configured to configure a demodulation format of the data recovery unit according to the selected demodulation format. Optionally, the configuration execution subunit 40013 is further configured to determine, according to the configuration parameter, the receiver selected by the subunit 40012. The configuration parameters configure the corresponding parameters of the data recovery unit 4002.

The embodiment of the present invention further provides a high-speed optical transmission system, the structure of which is shown in FIG. 5. The specific implementation structure includes a transmitter 300, a receiver 400, and a fiber link 200 connecting the transmitter 300 and the receiver 400.

The transmitter 300 is configured to receive a first external command by the control unit 3001, and configure a modulation format of the data processing unit 3002 of the transmitter 300 according to the first external command, and the data processing unit 3002 is to be transmitted according to the configured modulation format. The signal is modulated;

The receiver 400 is configured to receive a second external command through the control unit 4001, and configure a demodulation format of the data recovery unit 4002 of the receiver 400 according to the second external command, and input the data according to the configured demodulation format by the data recovery unit 4002. The signal is demodulated.

In the system provided by the embodiment of the present invention, the transmitter/receiver can adjust the modulation format according to the received external command, and then process the signal according to the configured parameters. That is to say, the transmitter/receiver in the system can be flexibly applied to long-distance, short-distance, metro, and different signal rate applications by adjusting parameters such as modulation format without hardware changes or upgrades. In high-speed optical transmission networks, modular production of communication equipment reduces the cost of implementing the network architecture.

The system provided by the embodiment of the present invention may further include at least one Flex ROADM (Flex Reconfigurable). Optical Add-Drop Multiplexer, a variable bandwidth reconfigurable optical add/drop multiplexer). As shown in Figure 6, Flex The ROADM 100, the transmitter 300 and the receiver 400 are connected by a fiber link 200, the Flex The ROADM is configured to receive a third external command, and configure a spectrum width, a signal rate, and/or a number of subcarriers according to the third external command.

The specific implementation manners of the embodiments of the present invention in the actual application process will be described in detail below.

In high-speed optical transmission networks, for different application scenarios (for example, depending on the transmission distance between the transmitter and the receiver, the application scenarios can be divided into long-distance, short-distance, and metropolitan areas, and can also be divided according to signal rate, fiber type, etc. Application scenarios), as well as different system performance parameters (system performance parameters can be, but are not limited to, including: channel quality of the fiber link, source output power of the transmitter, and source output power of the receiver), or even different user requirements, A variety of modulation formats are available. In order to adapt to different transmission distances, transmitters and receivers (optional also include Flex ROADM) may also need to configure the spectral width to match the transmission distance. In order to adapt to different signal rates, the transmitter, receiver (optional also includes Flex) The ROADM) may also need to configure the number of data channels and the number of subcarriers that match the signal rate. In addition, the transmitter and receiver may also need to configure other parameters according to different application scenarios. Therefore, in the embodiment of the present invention, the sender of the (1) external command (including the first external command, the second external command, and the third external command) may select a modulation format according to the application scenario and the system performance parameter (optional) Also select: configuration parameters such as: spectrum width, number of data channels, number of subcarriers, source output power, wavelength operating range, etc., and carry the selected configuration parameters in an external command (where the modulation format is determined, it is determined The format is adjusted, and the second external command may carry the selected modulation format or the corresponding demodulation format. Alternatively, (2) the modulation format is manually determined by the user (optionally determined: spectrum width, data channel) Configuration parameters such as number, number of subcarriers, source output power, wavelength operating range, etc., the computer device carries the configuration parameters determined by the user in an external command by executing an instruction input by the user; or, (3) the sender of the external command By the first external command sent to the transmitter and the second external command sent to the receiver, respectively The transmitter and the receiver transmit at least one of the following reference parameters: transmission distance, fiber type, signal rate, channel quality, so that the transmitter selects a modulation format according to the reference parameters (optional also selects: spectrum width, number of data channels, sub- Transmitter configuration parameters such as carrier number, source output power, and/or wavelength operating range), so that the receiver selects the demodulation format based on these reference parameters (optional also select: spectrum width, number of data channels, subcarriers) Receiver configuration parameters such as number, source output power, and/or wavelength operating range); optionally, the external command sender passes the third external command to Flex The ROADM sends the signal rate and at least one of the following reference parameters: transmission distance, fiber type, channel quality, for Flex The ROADM determines the number of subcarriers, the signal rate, and the spectrum width according to these reference parameters; or, (4) the sender of the external command includes both configuration parameters and reference parameters in an external command sent to the transmitter and the receiver; Transmitting, according to the configuration parameter in the first external command, the configuration parameter of the corresponding transmitter is directly configured, and according to the reference parameter in the first external command, selecting a configuration parameter of the transmitter matching the reference parameter for configuration; the receiver The configuration parameters of the corresponding receiver are directly configured according to the configuration parameters in the second external command, and the configuration parameters of the receiver matching the reference parameters are selected according to the reference parameters in the second external command.

If the above (1) implementation is adopted, the parameter correspondence can be configured in advance on the sender of the external command.

If the above (3) or (4) implementations are used, they can be pre-wired at the transmitter, receiver and Flex. Configure the corresponding parameters in the ROADM.

In the parameter correspondence relationship in the embodiment of the present invention, the correspondence between the reference parameter and the configuration parameter is described.

The configuration parameters are selected according to the reference parameters such as the application scenario and the system performance parameter (the configuration parameters include: modulation format, spectrum width, number of data channels, number of subcarriers, etc.), which can be implemented by using an existing implementation manner. Including: fiber type, signal rate, and transmission distance, the configuration of the parameter correspondence is illustrated as an example:

When the signal rate in the system is 100G, the system chooses to use 1 subcarrier to carry the signal. Among them, the long-distance (transmission distance is more than 200 kilometers, generally between 200 kilometers and 2000 kilometers) 100G system can adopt the spectrum width of 50GHz, the modulation format is PM-QPSK, and the transmitter/receiver detection mode is coherent Detection; short-distance / metro (transmission distance less than 200 km) 100G system can use a spectrum width of 25GHz, the modulation format can be PM-16-QAM (transmitter/receiver detection mode is coherent detection), can be used The spectrum width may also be 50 GHz, and the modulation format may be PM-OFDM (transmitter/receiver detection mode is coherent detection) or OFDM-QPSK (transmitter/receiver detection mode is direct detection).

When the signal rate in the system is 400G, the long-distance 400G system with a transmission distance greater than 500 kilometers can adopt a spectrum width of 125 GHz, and the modulation format is PM-OFDM-QPSK (the transmitter/receiver detection mode is coherent detection). 5 subcarriers can be used to carry signals; short-range/metro-domain 400G systems with transmission distances between 100 km and 500 km can carry 2 subcarriers to carry signals, the spectrum width is 100 GHz, and the modulation format is PM-16QAM, transmitter The detection mode of the receiver/receiver is coherent detection; the short-range/metro-area 400G system with a transmission distance of less than 80 km can carry 2~3 subcarriers to carry signals, the spectrum width is 75 GHz, the modulation format is PM-32QAM, transmitter/reception The detection mode of the machine is coherent detection.

When the signal rate in the system is 1T, the long-distance 1T system with a transmission distance greater than 500 kilometers can carry 12 subcarriers to carry signals, the spectrum width is 300GHz, the modulation format is PM-OFDM-QPSK, and the transmitter/receiver detection mode For coherent detection; a short-range/metro-domain 1T system with a transmission distance between 100 km and 500 km can carry 6 subcarriers to carry signals with a spectrum width of 150 GHz and a modulation format of PM-OFDM-16QAM, transmitter/receiver The detection mode of the machine is coherent detection; the short-range/metro-domain 1T system with a transmission distance of less than 80 km can carry 4 subcarriers to carry signals, the spectrum width is 25 GHz, the modulation format is PM-OFDM-32QAM, and the transmitter/receiver The detection method is coherent detection.

Taking G.652 fiber as an example, the parameter correspondence determined according to the above principle is shown in Table 1:

Signal rate (bit/s)	Transmission distance (km)	Spectrum width (GHz)	Modulation format	Number of subcarriers (units)	Detection method
100G	>200	50	PM-QPSK	1	Coherent detection
	<200	25	PM-16-QAM	1	Coherent detection
	<200	50	PM-OFDM-QPSK	1	Coherent detection
	<200	50	OFDM-QPSK (Direct Modulation)	1	Direct detection
400G	>500	125	PM-OFDM-QPSK	5	Coherent detection
	100-500	100	PM-16QAM	2	Coherent detection
	<100	75	PM-32QAM	2~3	Coherent detection
1T	>500	300	PM-OFDM-QPSK	12	Coherent detection
	100-500	150	PM-OFDM-16QAM	6	Coherent detection
	<100	100	PM-OFDM-32QAM	4	Coherent detection

Table 1

The specific implementation manners of the transmitter and its parameter configuration method provided by the embodiments of the present invention in the actual application process are described in detail below.

Application Example 1

In the first embodiment of the application, the specific implementation structure of the transmitter is as shown in FIG. 7.

Wherein, the data encoding and distributing unit 30021, digital signal processing (Digital Signal Processor, DSP) unit 30022, digital to analog conversion (Digital Analogue The conversion, DAC) unit 30023, the light source 30024, the polarization beam splitter 30025, the subcarrier generation unit 30026, the modulation unit 30027, the polarization combiner 30028, and the multiplexer (Muxplexer, MUX) 30029 collectively constitute the data processing unit 3002.

When the modulation format is OFDM modulation of 1 subcarrier (PM-OFDM-QPSK modulation including coherent detection, and OFDM-QPSK modulation is directly detected), the digital signal processing unit 30022 and the digital-to-analog conversion unit 30023 are not required, and the control unit 3001 The digital processing unit 30022 and the digital to analog conversion unit 30023 can be turned off by the analog switch 300210. Correspondingly, the implementation structure of the transmitter is shown in FIG. 8.

The digital signal processing unit 30022 is not required when pre-processing of the signal is not required, and the control unit 3001 can turn off the digital processing unit 30022 through the analog switch 300210. Correspondingly, the implementation structure of the transmitter is shown in FIG.

The parameter configuration of the transmitter shown in Figure 7 works as follows:

The control unit 3001 of the transmitter receives the first external command;

If the first external command carries the number of data channels, the number of subcarriers, and the modulation format, the control unit 3001 configures the number N of data channels of the data encoding and distributing unit 30021 according to the number N of data channels carried in the first external command, and the control unit 3001, according to the number n of subcarriers carried in the first external command, configure subcarrier generation unit 30026, digital signal processing unit 30022, digital to analog conversion unit 30023, and number of subcarriers n of modulation unit 30027, and control unit 3001 according to a modulation format carried in an external command, configuring a modulation format of the modulation unit 30027;

If the first external command carries the reference parameter, the control unit 3001 selects the number of data channels N, the number of subcarriers n, and the modulation that match the reference parameters carried in the first external command by searching the pre-stored parameter correspondence. Format, and configure the number N of data channels of the data encoding and distributing unit 30021 according to the selected number of data channels N, and configure the subcarrier generating unit 30026, the digital signal processing unit 30022, the digital to analog converting unit 30023 according to the selected number of subcarriers n. And the number n of subcarriers of the modulating unit 30027, the modulation format of the modulating unit 30027 is configured according to the determined modulation format.

If the modulation format is OFDM modulation of one subcarrier, the control unit 3001 cuts off the connection between the digital signal processing unit 30022 and the data encoding distribution unit 30021 by controlling the analog switch 300210, and cuts off the connection between the digital to analog conversion unit 30023 and the modulation unit 30027. The data encoding distribution unit 30021 is directly connected to the modulating unit 30027 (as shown in FIG. 8). If the signal is not required to be pre-processed, the control unit 3001 can also cut off the connection between the digital signal processing unit 30022 and the data encoding and distributing unit 30021 by controlling the analog switch 300210, and cut off the digital signal processing unit 30022 and the digital-to-analog conversion unit 30023. The connection between the data encoding and distribution unit 30021 is directly connected to the digital to analog conversion unit 30023.

After the above parameter configuration is completed, the signal processing principle of the transmitter shown in FIG. 7 is as follows:

In the circuit section:

S301, the high-speed parallel m-channel electrical signal enters the data encoding and distributing unit 30021, and the data encoding and distributing unit 30021 performs m:N conversion on the input m-channel electrical signal, and outputs N-channel electrical signals; wherein N is configured by the control unit 3001. The number of data channels; if the input electrical signal is not encoded, the data encoding distribution unit 30021 encodes the input m electrical signal according to a predetermined encoding format before performing m:N conversion on the input electrical signal. The code can be SD-FEC (Soft-Decision) Forward Error Correction, Soft Decision Forward Error Correction) or HD-FEC (Hard-Decision Forward Error) Correction, hard decision forward error correction);

If the signal is not required to be preprocessed, but digital to analog conversion is required, then S303 is performed;

If the signal is not required to be preprocessed and the signal is not required to be digital-to-analog converted, then S304 is performed, and the data encoding and distributing unit 30021 actually performs m:n conversion (ie, the number of data channels N=the number of subcarriers n), The output n-channel electrical signals can be divided into two groups, each group of n channels, respectively entering the I/Q arms of the two sets of modulators 30027; or four groups, each group of n channels, respectively entering the I of the two sets of modulators 30027 /Q, X/Y four arms;

If the signal needs to be pre-processed, the N-channel electrical signal outputted by the data encoding and distributing unit 30021 is executed to enter the digital signal processing unit 30022, and the digital signal processing unit 30022 performs signal pre-processing on the input electrical signal, according to the control unit 3001. The number of configured subcarriers n outputs n electrical signals to the digital to analog conversion unit 30023, executing S303;

S303, the digital-to-analog conversion unit 30023 performs the digital-to-analog conversion processing on the input n-channel electrical signals according to the number n of sub-carriers arranged by the control unit 3001, and outputs the same to the modulation unit 30027;

The specific implementation manner may be: (1) divided into two groups, each group of n channels, respectively outputting electrical signals to the I/Q arms of the two sets of modulators 30027; (2) being divided into four groups, each group of n ways, respectively The four arms of the I/Q and X/Y of the two sets of modulators 30027 output electrical signals.

In the light path section:

S304. The light source 30024 generates an optical signal.

S305, the polarization beam splitter 30028 divides the light signal generated by the light source 30024 into two polarized lights, and outputs the two polarized lights to the two sets of subcarrier generating units 30026;

S306. The two sets of subcarrier generating units 30026 respectively process the input polarized light, generate n way subcarriers, and output n subcarriers to the I/Q arms of the two sets of modulation units 30027, respectively, or respectively, respectively, n subcarriers Output to the I/Q, X/Y four arms of the two sets of modulation units 30027;

Where n is the number of subcarriers configured by the control unit 3001.

S307. Each group of modulation units 30027 modulates the input optical signal and the electrical signal according to a modulation format configured by the control unit 3001, and generates n sub-wavelength optical signals according to the number of subcarriers configured by the control unit 3001.

S308, the polarization combiner 30028 performs beam combining processing on the sub-wavelength optical signals generated by the two sets of modulation units 30027 according to the modulation format configured by the control unit 3001, and outputs n sub-wavelength optical signals;

S309. The multiplexer 30029 performs wavelength combining processing on the n-channel sub-wavelength optical signals output from the polarization combiner 30028, and the combined optical signals are output signals of the transmitter.

The specific implementation manners of the receiver and its parameter configuration method provided by the embodiments of the present invention in the actual application process are described in detail below.

Application Example 2

In the second embodiment of the application, the specific implementation structure of the receiver is as shown in FIG.

The mixing and subcarrier separating unit 40021, the light source 40022, the subcarrier generating unit 40023, the photoelectric conversion (Optical/Electrical, O/E) unit 40024, and the analog to digital conversion (Analogue) Digital The conversion, ADC) unit 40025, the digital signal processing (DSP) unit 40026, and the data synthesizing unit 40027 collectively constitute a data recovery unit 4002.

The parameter configuration of the receiver shown in Figure 10 works as follows:

The control unit 4001 of the receiver receives the second external command;

If the second external command carries the number of subcarriers n and the modulation format (or the demodulation format), the control unit 4001 configures the subcarrier generation unit 40023, the mixing, and the number of subcarriers n carried in the second external command. The number of subcarriers n of the subcarrier separating unit 40021, the analog to digital converting unit 40025, the digital signal processing unit 40026, and the data synthesizing unit 40027, and the control unit 4001 is configured according to a modulation format (or a demodulation format) carried in the second external command. a demodulation format of the digital signal processing unit 40026;

If the reference parameter is carried in the second external command, the control unit 4001 selects the number of subcarriers n and the demodulation format that match the reference parameter carried in the second external command by searching the pre-stored parameter correspondence, and according to The number of selected subcarriers n, the configuration subcarrier generating unit 40023, the mixing and subcarrier separating unit 40021, the analog to digital converting unit 40025, the digital signal processing unit 40026, and the number of subcarriers n of the data synthesizing unit 40027, the control unit 4001 The demodulation format of the digital signal processing unit 40026 is configured in accordance with the selected demodulation format.

After the above parameter configuration is completed, the signal processing operation of the receiver shown in FIG. 10 is as follows:

In the light path section:

S401. The light source 40022 generates an optical signal.

S402, the subcarrier generating unit 40023 processes the optical signal generated by the light source 40022, generates n way subcarriers, and outputs n way subcarriers to the mixing and subcarrier separating unit 40021;

In the circuit section:

S403. The mixing and subcarrier separating unit 40021 receives the input signal on the optical fiber, and performs mixing processing on the input signal according to the number n of subcarriers configured by the control unit 4001, and performs subcarrier separation on the mixed n signal. , separating the n-way sub-wavelength optical signal output to the photoelectric conversion unit 40024;

S404, the photoelectric conversion unit 40024 converts the n-channel wavelet long-length signal into an electrical signal, and outputs the n-channel electrical signal to the analog-to-digital conversion unit 40025;

S405, the analog-to-digital conversion unit 40025 performs analog-to-digital conversion on the input n-channel electrical signals according to the number n of sub-carriers configured by the control unit 4001, and outputs the same to the digital signal processing unit 40026;

S406. The digital signal processing unit 40026 recovers the n-channel electrical signal according to the demodulation format configured by the control unit 4001, and outputs the restored n-channel electrical signal to the data synthesizing unit 40027 according to the number of subcarriers n configured by the control unit 4001. ;

The signal is generated in the process of transmitting on the fiber link, and the digital signal processing unit 40026 performs the recovery process on the electrical signal, including: performing line compensation and demodulation processing on the electrical signal. The specific implementation manner of the line compensation may be: dispersion compensation, PMD compensation, nonlinear compensation, and the like. The recovery process may specifically implement the signal by using a fast Fourier transform, an equalization algorithm, an SD-FEC decoding algorithm, or the like;

S407. The data synthesizing unit 40027 combines the n electrical signals into m electrical signals according to the number n of subcarriers configured by the control unit 4001, and outputs the signals.

Application Example 3

In the third embodiment of the application, the specific implementation structure of the receiver is as shown in FIG.

The subcarrier separation unit 40028, the mixing unit 40029, the light source 40022, the subcarrier generation unit 40023, the photoelectric conversion unit 40024, the analog to digital conversion unit 40025, the digital signal processing unit 40026, and the data synthesis unit 40027 collectively constitute a data recovery unit 4002. .

The parameter configuration of the receiver shown in Figure 11 works as follows:

The control unit 4001 of the receiver receives the second external command;

If the second external command carries the number of subcarriers n and the modulation format (or the demodulation format), the control unit 4001 configures the subcarrier generation unit 40023 and the subcarrier separation according to the number n of subcarriers carried in the second external command. The number of subcarriers n of the unit 40028, the mixing unit 40029, the analog to digital conversion unit 40025, the digital signal processing unit 40026, and the data synthesizing unit 40027, and the control unit 4001 according to the modulation format (or demodulation format) carried in the second external command. Configuring a demodulation format of the digital signal processing unit 40026;

If the reference parameter is carried in the second external command, the control unit 4001 selects the number of subcarriers n and the demodulation format that match the reference parameter carried in the second external command by searching the pre-stored parameter correspondence, and according to The number of selected subcarriers n, the number of subcarriers n of the subcarrier generation unit 40023, the subcarrier separation unit 40028, the mixing unit 40029, the analog to digital conversion unit 40025, the digital signal processing unit 40026, and the data synthesizing unit 40027 are controlled. Unit 4001 configures the demodulation format of digital signal processing unit 40026 in accordance with the selected demodulation format.

After the parameter configuration is completed, the signal processing principle of the receiver shown in FIG. 11 is as follows:

In the light path section:

S501. The light source 40022 generates an optical signal.

S502, the subcarrier generating unit 40028 processes the optical signal generated by the light source 40022 according to the number n of subcarriers configured by the control unit 4001, generates n way subcarriers, and outputs n subcarriers to the mixing unit 40029;

In the circuit section:

S503, the subcarrier separation unit 40028 separates the input signal of the optical fiber according to the number of subcarriers n arranged by the control unit 4001, separates the n-channel sub-wavelength optical signal, and outputs the n-channel sub-wavelength optical signal to the mixing unit 40029;

S504. The mixing unit 40029 performs mixing processing on the input n-channel sub-wavelength optical signals according to the number of sub-carriers n and n-subcarriers configured by the control unit 4001, and outputs the n-channel optical signals obtained after the mixing processing to the photoelectric conversion. Unit 40024;

S505, photoelectric conversion unit 40024 converts n optical signals into electrical signals, and outputs n electrical signals to analog to digital conversion unit 40025;

S506, the analog-to-digital conversion unit 40025 performs analog-to-digital conversion on the input n-channel electrical signal according to the number n of sub-carriers configured by the control unit 4001, and outputs it to the digital signal processing unit 40026;

S507. The digital signal processing unit 40026 recovers the n-channel electrical signal according to the demodulation format configured by the control unit 4001, and outputs the restored n-channel electrical signal to the data synthesizing unit 40027 according to the number of subcarriers n configured by the control unit 4001. ;

The signal is generated in the process of transmitting on the fiber link, and the digital signal processing unit 40026 performs the recovery process on the electrical signal, including: performing line compensation and demodulation processing on the electrical signal. The specific implementation manner of the line compensation may be: dispersion compensation, PMD compensation, nonlinear compensation, and the like. The recovery process may specifically implement the signal by using a fast Fourier transform, an equalization algorithm, an SD-FEC decoding algorithm, or the like;

S508. The data synthesizing unit 40027 combines the n electrical signals into m electrical signals according to the number n of subcarriers configured by the control unit 4001, and outputs the signals.

Application Example 4

In the fourth embodiment of the application, the specific implementation structure of the receiver is as shown in FIG.

The mixing unit 40029, the demultiplexer (DEMUX) 400210, the light source 40022, the subcarrier generating unit 40023, the photoelectric conversion unit 40024, the analog to digital conversion unit 40025, the digital signal processing unit 40026, and the data synthesizing unit 40027 are configured together. The data recovery unit 4002.

The parameter configuration of the receiver shown in Figure 12 works as follows:

The control unit 4001 of the receiver receives the second external command;

If the second external command carries the number of subcarriers n and the modulation format (or the demodulation format), the control unit 4001 configures the subcarrier generation unit 40023 and the mixing unit according to the number n of subcarriers carried in the second external command. 40029, the demultiplexer 400210, the analog to digital conversion unit 40025, the digital signal processing unit 40026, and the number of subcarriers n of the data synthesizing unit 40027, and the control unit 4001 is configured according to a modulation format (or a demodulation format) carried in the second external command. Configuring a demodulation format of the digital signal processing unit 40026;

If the reference parameter is carried in the second external command, the control unit 4001 selects the number of subcarriers n and the demodulation format that match the reference parameter carried in the second external command by searching the pre-stored parameter correspondence, and according to The number n of selected subcarriers, the number of subcarriers n of the subcarrier generating unit 40023, the mixing unit 40029, the demultiplexer 400210, the analog to digital conversion unit 40025, the digital signal processing unit 40026, and the data synthesizing unit 40027 are controlled. Unit 4001 configures the demodulation format of digital signal processing unit 40026 in accordance with the selected demodulation format.

After the parameter configuration is completed, the signal processing principle of the receiver shown in FIG. 12 is as follows:

In the light path section:

S601. The light source 40022 generates an optical signal.

S602, the subcarrier generating unit 40023 processes the optical signal generated by the light source 40022 according to the number n of subcarriers configured by the control unit 4001, generates n way subcarriers, and outputs n subcarriers to the mixing unit 40029;

In the circuit section:

S603. The mixing unit 40029 receives the input signal on the optical fiber, and performs mixing processing on the input signal according to the number of subcarriers n and n subcarriers configured by the control unit 4001, and outputs the n signal obtained after the mixing processing to the solution. Multiplexer 400210;

S604, the demultiplexer 400210 optically demultiplexes the input signal, separates n sets of sub-wavelength optical signals according to the number n of subcarriers configured by the control unit 4001, and outputs n sets of sub-wavelength optical signals to the photoelectric conversion unit 40024. Wherein each set of sub-wavelength optical signals respectively comprises four polarized lights: X/Y/I/Q;

S605, the photoelectric conversion unit 40024 converts the n-channel sub-wavelength optical signal into an electrical signal, and outputs the n-channel electrical signal to the analog-to-digital conversion unit 40025;

S606, the analog-to-digital conversion unit 40025 performs analog-to-digital conversion on the input n-channel electrical signals according to the number n of sub-carriers configured by the control unit 4001, and outputs the same to the digital signal processing unit 40026;

S607, the digital signal processing unit 40026 recovers the n-channel electrical signal according to the modulation format configured by the control unit 4001, and outputs the restored n-channel electrical signal to the data synthesizing unit 40027 according to the number of subcarriers n configured by the control unit 4001;

The signal is generated in the process of transmitting on the fiber link, and the digital signal processing unit 40026 performs the recovery process on the electrical signal, including: performing line compensation and demodulation processing on the electrical signal. The specific implementation manner of the line compensation may be: dispersion compensation, PMD compensation, nonlinear compensation, and the like. The recovery process may specifically implement the signal by using a fast Fourier transform, an equalization algorithm, an SD-FEC decoding algorithm, or the like;

S608. The data synthesizing unit 40027 combines the n electrical signals into m electrical signals according to the number n of subcarriers configured by the control unit 4001, and outputs the signals.

All or part of the steps of implementing the foregoing method embodiments may be performed by hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and when executed, the program includes the steps of the foregoing method embodiments; The foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims (24)

1. A data processing method for a transmitter in a high-speed optical transmission system, wherein when the parameters of the transmitter need to be adjusted, the method includes:

   The control unit of the transmitter receives the first external command;

   The control unit configures a modulation format of the data processing unit of the transmitter according to the received first external command;

   The data processing unit modulates a signal to be transmitted according to a modulation format configured by the control unit.
2. The method according to claim 1, wherein the first external command carries configuration parameters, and the configuration parameters include: a modulation format;

   The configuring, by the control unit, the modulation format of the data processing unit of the transmitter according to the received first external command includes:

   The control unit configures a modulation format of the data processing unit of the transmitter according to a modulation format carried in the first external command.
3. The method according to claim 1, wherein the first external command carries at least one of the following reference parameters: a transmission distance, a fiber type, a signal rate, and a channel quality;

   The configuring, by the control unit, the modulation format of the data processing unit of the transmitter according to the received first external command includes:

   The control unit matches the reference parameter carried in the first external command with the pre-saved parameter correspondence, and selects a modulation format corresponding to the reference parameter carried in the first external command;

   The control unit configures a modulation format of the data processing unit of the transmitter according to the selected modulation format.
4. The method according to any one of claims 1 to 3, further comprising:

   The control unit configures a spectrum width of the data processing unit according to the received first external command;

   If the first external command carries a configuration parameter, the configuration parameter further includes: a spectrum width;

   If the first external command carries the following at least one reference parameter: transmission distance, fiber type, signal rate, channel quality, the control unit configures a spectrum width of the data processing unit according to the received first external command, including Matching the first external command with a pre-saved parameter correspondence, selecting a spectrum width corresponding to the reference parameter carried in the first external command, and configuring the data processing unit of the transmitter according to the selected spectrum width Spectrum width.
5. The method according to any one of claims 1 to 3, further comprising:

   The control unit configures parameters of the data processing unit of at least one of the following transmitters according to the received first external command: the number of data channels, the number of subcarriers, the source output power of the transmitter, and the wavelength working range.
6. The method according to any one of claims 1 to 5, wherein the first external command is sent to the transmitter by a network management system or a control system; or the first external command is passed under a control protocol. Sending to the transmitter; the first external command is sent by the computer device to the transmitter through a command line.
7. A data processing method for a receiver in a high-speed optical transmission system, wherein when the parameters of the receiver need to be adjusted, the method includes:

   The control unit of the receiver receives a second external command;

   The control unit configures a demodulation format of the data recovery unit of the receiver according to the received second external command;

   The data recovery unit performs demodulation processing on the input signal according to a demodulation format configured by the control unit.
8. The method of claim 7 wherein:

   The second external command carries a configuration parameter, where the configuration parameter includes: a modulation format, and the control unit configures a demodulation format of the data recovery unit of the receiver according to the received second external command, including: according to the a modulation format carried in the second external command configuring a demodulation format of the data recovery unit of the receiver;

   or,

   The second external command carries a configuration parameter, where the configuration parameter includes: a demodulation format, and the control unit configures a demodulation format of the data recovery unit of the receiver according to the received second external command, including: The demodulation format carried in the second external command configures a demodulation format of the data recovery unit of the receiver.
9. The method according to claim 7, wherein the second external command carries at least one of the following reference parameters: a transmission distance, a fiber type, a signal rate, and a channel quality;

   The demodulation format of the data recovery unit of the receiver configured by the control unit according to the received second external command includes:

   The control unit matches the reference parameter carried in the second external command with the pre-stored parameter correspondence, and selects a demodulation format corresponding to the reference parameter carried in the second external command, according to the selected demodulation format. A demodulation format of the data recovery unit of the receiver is configured.
10. The method according to any one of claims 7 to 9, wherein the method further comprises:

    The control unit configures a spectrum width of the data recovery unit according to the received second external command;

    If the second external command carries a configuration parameter, the configuration parameter further includes: a spectrum width;

    If the second external command carries at least one of the following reference parameters: transmission distance, fiber type, signal rate, channel quality, the control unit configures the data recovery unit of the receiver according to the received second external command. The spectrum width includes: matching the second external command with a pre-saved parameter correspondence, selecting a spectrum width corresponding to the reference parameter carried in the second external command, and configuring the receiver according to the selected spectrum width The spectral width of the data recovery unit.
11. The method according to any one of claims 7 to 9, wherein the method further comprises:

    The control unit configures parameters of the data recovery unit of at least one of the following receivers according to the received second external command: the number of data channels, the number of subcarriers, the source output power of the receiver, and the wavelength operation range.
12. The method according to any one of claims 7 to 11, wherein the second external command is sent to the receiver by a network management system or a control system; or the second external command is passed under a control protocol. Sending to the receiver; the second external command is sent by the computer device to the receiver through a command line.
13. A transmitter in a high speed optical transmission system, comprising:

    Control unit and data processing unit;

    When the parameter of the transmitter needs to be adjusted, the control unit is configured to receive a first external command, and configure a modulation format of the data processing unit according to the first external command;

    The data processing unit is configured to modulate a signal to be transmitted according to a modulation format configured by the control unit.
14. The transmitter of claim 13 wherein said control unit comprises:

    The external command receiving subunit is configured to receive the first external command, where the first external command carries at least one of the following reference parameters: a transmission distance, an optical fiber type, a signal rate, and a channel quality;

    a configuration parameter determining sub-unit, configured to match a reference parameter carried in the first external command with a pre-saved parameter correspondence, and select a modulation format corresponding to the reference parameter carried in the first external command;

    And a configuration execution subunit, configured to configure a modulation format of the data processing unit according to the selected modulation format.
15. The transmitter according to claim 13 or 14, wherein the data processing unit comprises: a data encoding and distributing unit, a digital signal processing unit, a digital-to-analog conversion unit, a light source, a polarization beam splitter, a subcarrier generating unit, Modulation unit, polarization combiner and multiplexer;

    The control unit is configured to configure, according to the first external command, a modulation format of the modulation unit, and according to the first external command, the subcarrier generation unit, a digital signal processing unit, and a digital-to-analog conversion Configuring a number of subcarriers of the unit and the modulating unit, and configuring a number of data channels of the data encoding and distributing unit according to the first external command;

    The data encoding and distributing unit is configured to perform m; N conversion according to the number of data channels configured by the control unit to generate an N-channel electrical signal; if the input is an encoded m-channel electrical signal The data encoding and distributing unit is further configured to perform encoding processing on the input m electrical signal according to a predetermined encoding format;

    The digital signal processing unit is configured to perform signal preprocessing on the N electrical signals, and output n electrical signals according to the number of subcarriers configured by the control unit;

    The digital-to-analog conversion unit is configured to perform digital-to-analog conversion on the input n-channel electrical signals according to the number of sub-carriers configured by the control unit;

    The light source is for generating an optical signal;

    The polarizing beam splitter is configured to split the optical signal generated by the light source into two polarized lights, and output the two polarized lights to two sets of subcarrier generating units respectively;

    The two sets of subcarrier generating units are configured to respectively process the input polarized light, generate n way subcarriers according to the number of subcarriers configured by the control unit, and output the n way subcarriers to two sets of modulation units;

    The two sets of modulation units are configured to modulate the input optical signal and the electrical signal according to a modulation format configured by the control unit, and generate an n-channel sub-wavelength optical signal according to the number of sub-carriers configured by the control unit, and then output Giving the polarization combiner;

    The polarization combiner is configured to perform beam combining processing on the n-channel sub-wavelength optical signals generated by the two sets of modulation units according to the number of sub-carriers configured by the control unit, and output n-sub-wavelength optical signals to the multiplexer;

    The multiplexer is configured to perform wavelength combining processing on the input n-sub-wavelength optical signals, and output the combined optical signals.
16. The transmitter according to claim 15, wherein the control unit is further configured to: if the control unit is configured by the modulation unit to perform orthogonal frequency division multiplexing modulation with a modulation format of 1 subcarrier, the control unit is further configured to: Disconnecting the digital signal processing unit and the digital to analog conversion unit by an analog switch;

    The data encoding and distributing unit is connected to the modulating unit; the light source is connected to the polarization beam splitter; the polarization beam splitter is further connected to the subcarrier generating unit; and the two sets of subcarrier generating units are further Connected to the two sets of modulation units respectively; the two sets of modulation units are also coupled to the polarization combiner; the polarization combiner is also coupled to the multiplexer.
17. The transmitter according to claim 15, wherein the control unit is further configured to disconnect the digital processing unit by an analog switch if signal preprocessing is not required;

    The data encoding and distributing unit is connected to the digital to analog converting unit; the digital to analog converting unit is further connected to the modulating unit; the light source is connected to the polarizing beam splitter; and the polarizing beam splitter is also Said subcarrier generating unit is connected; said two sets of subcarrier generating units are further connected to said two sets of modulation units; said two sets of modulation units are further connected with said polarization combiner; said polarization combiner is further The multiplexer is connected.
18. A receiver in a high speed optical transmission system, comprising:

    Control unit, data recovery unit;

    When the parameter of the receiver needs to be adjusted, the control unit is configured to receive a second external command, and configure a demodulation format of the data recovery unit according to the second external command;

    The data recovery unit is configured to demodulate the input signal according to a demodulation format configured by the control unit.
19. The receiver according to claim 18, wherein said control unit comprises:

    The external command receiving subunit is configured to receive the second external command, where the second external command carries at least one of the following reference parameters: a transmission distance, a fiber type, a signal rate, and a channel quality;

    a configuration parameter determining subunit, configured to match a reference parameter carried in the second external command with a pre-saved parameter correspondence, and select a demodulation format corresponding to the reference parameter carried in the second external command;

    And a configuration execution subunit configured to configure a demodulation format of the data recovery unit according to the selected demodulation format.
20. The receiver according to claim 18 or 19, wherein the data recovery unit comprises: a mixing and subcarrier separating unit, a light source, a subcarrier generating unit, a photoelectric conversion unit, an analog to digital conversion unit, and digital signal processing. Unit and data synthesis unit;

    The control unit is configured to configure, according to the second external command, a demodulation format of the digital signal processing unit, and generate, transmit, and subcarrier the subcarrier according to the second external command. Configuring a number of subcarriers of the separation unit, the analog to digital conversion unit, the digital signal processing unit, and the data synthesis unit;

    The light source is for generating an optical signal;

    The subcarrier generating unit is configured to: after processing the optical signal according to the number of subcarriers configured by the control unit, generate n way subcarriers, and output the n way subcarriers to the mixing and subcarriers Separation unit

    The mixing and subcarrier separating unit is configured to perform mixing processing on the input signal according to the number of subcarriers configured by the control unit, and perform subcarrier separation on the mixed n signal, and separate n subwavelengths. Outputting an optical signal to the photoelectric conversion unit;

    The photoelectric conversion unit is configured to: after converting the n-channel sub-wavelength optical signal into an electrical signal, output the n-channel electrical signal to the analog-to-digital conversion unit;

    The analog-to-digital conversion unit is configured to perform analog-to-digital conversion on the input n-channel electrical signals according to the number of sub-carriers configured by the control unit, and output the signals to the digital signal processing unit;

    The digital signal processing unit is configured to recover an n-channel electrical signal according to a demodulation format configured by the control unit, and output the restored n-channel electrical signal according to the number of subcarriers configured by the control unit Data synthesis unit;

    The data synthesizing unit is configured to combine n electrical signals into m electrical signals according to the number of subcarriers configured by the control unit, and output the signals.
21. The receiver according to claim 18 or 19, wherein the data recovery unit comprises: a subcarrier separation unit, a mixing unit, a light source, a subcarrier generation unit, a photoelectric conversion unit, an analog to digital conversion unit, and a digital signal. Processing unit and data synthesizing unit;

    The control unit is configured to configure, according to the second external command, a demodulation format of the digital signal processing unit, and according to the second external command, the subcarrier generation unit, a subcarrier separation unit, The number of subcarriers of the mixing unit, the analog to digital conversion unit, the digital signal processing unit, and the data combining unit is configured;

    The light source is for generating an optical signal;

    The subcarrier generating unit is configured to: after processing the optical signal according to the number of subcarriers configured by the control unit, generate n way subcarriers, and output the n way subcarriers to the mixing unit;

    The subcarrier separation unit is configured to perform subcarrier separation on the input signal according to the number of subcarriers configured by the control unit, and output n sub-wavelength optical signals to the mixing unit.

    The mixing unit is configured to perform mixing processing on the input n-channel sub-wavelength optical signals according to the number of sub-carriers configured by the control unit and the n-channel sub-carriers output by the sub-carrier generating unit, and after mixing processing The obtained n-channel optical signal is output to the photoelectric conversion unit;

    The photoelectric conversion unit is configured to: after converting the n-channel sub-wavelength optical signal into an electrical signal, output the n-channel electrical signal to the analog-to-digital conversion unit;

    The analog-to-digital conversion unit is configured to perform analog-to-digital conversion on the input n-channel electrical signals according to the number of sub-carriers configured by the control unit, and output the signals to the digital signal processing unit;

    The digital signal processing unit is configured to recover an n-channel electrical signal according to a demodulation format configured by the control unit, and output the restored n-channel electrical signal according to the number of subcarriers configured by the control unit Data synthesis unit;

    The data synthesizing unit is configured to combine n electrical signals into m electrical signals according to the number of subcarriers configured by the control unit, and output the signals.
22. The receiver according to claim 18 or 19, wherein the data recovery unit comprises: a mixing unit, a demultiplexer, a light source, a subcarrier generating unit, a photoelectric conversion unit, an analog to digital conversion unit, and a digital signal. Processing unit and data synthesizing unit;

    The control unit is configured to configure, according to the second external command, a demodulation format of the digital signal processing unit, and generate a unit, a mixing unit, and a solution according to the second external command. Configuring a number of subcarriers of the multiplexer, the analog to digital conversion unit, the digital signal processing unit, and the data synthesizing unit;

    The light source is for generating an optical signal;

    The subcarrier generating unit is configured to: after processing the optical signal according to the number of subcarriers configured by the control unit, generate n way subcarriers, and output the n way subcarriers to the mixing unit;

    The mixing unit is configured to perform mixing processing on the input n-channel sub-wavelength optical signals according to the number of sub-carriers configured by the control unit and the n-channel sub-carriers output by the sub-carrier generating unit, and after mixing processing Obtaining n optical signals to the demultiplexer;

    The demultiplexer is configured to perform optical demultiplexing on the input n optical signals, and separate n sets of sub-wavelength optical signals according to the number of subcarriers configured by the control unit, and the n sets of sub-wavelength optical signals Output to the photoelectric conversion unit;

    The photoelectric conversion unit is configured to: after converting the n-channel sub-wavelength optical signal into an electrical signal, output the n-channel electrical signal to the analog-to-digital conversion unit;

    The analog-to-digital conversion unit is configured to perform analog-to-digital conversion on the input n-channel electrical signals according to the number of sub-carriers configured by the control unit, and output the signals to the digital signal processing unit;

    The digital signal processing unit is configured to recover an n-channel electrical signal according to a demodulation format configured by the control unit, and output the restored n-channel electrical signal according to the number of subcarriers configured by the control unit Data synthesis unit;

    The data synthesizing unit is configured to combine n electrical signals into m electrical signals according to the number of subcarriers configured by the control unit, and output the signals.
23. A high speed optical transmission system, comprising:

    a transmitter and receiver connected by a fiber optic link;

    The transmitter is configured to receive a first external command by the control unit, and configure a modulation format of the data processing unit according to the first external command, and perform modulation processing on the signal to be transmitted according to the configured modulation format by the data processing unit;

    The receiver is configured to receive a second external command by the control unit, and configure a demodulation format of the data recovery unit according to the second external command, and perform, by using the data recovery unit, the input signal according to the configured demodulation format. Demodulation processing.
24. The system of claim 23, wherein the system further comprises:

    At least one variable bandwidth reconfigurable optical add/drop multiplexer disposed on the fiber optic link, the variable bandwidth reconfigurable optical add/drop multiplexer for receiving a third external command, according to The third external command configures at least one of the following parameters: a spectrum width, a signal rate, and a number of subcarriers.

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