WO2017049444A1 - Port matching method and apparatus - Google Patents

Abstract

Provided are a port matching method and apparatus. The method comprises: a head end equipment (HEE) respectively sending, to n items of tail end equipment (TEE), a first pilot frequency parameter, a first scanning parameter and a scanning starting command, wherein the first pilot frequency parameter comprises a first pilot frequency, first pilot frequencies corresponding to various TEEs are different from each other, the first scanning parameter comprises a first scanning step and a first scanning range, and n is a positive integer; the HEE receiving a first scanning light signal which is respectively sent by m TEEs in the n TEEs by means of the first scanning parameter, wherein the first scanning light signal sent by each TEE in the m TEEs contains information about the first pilot frequency of each TEE, and m is a positive integer less than or equal to n; the HEE determining, according to the first scanning light signal, whether there is a first TEE, the wavelength of the sent light of which matches a target wavelength channel; and when the first TEE exists, sending a scanning stop command to the first TEE.

Description

Port matching method and device Technical field

The present invention relates to the field of optical communication technologies, and in particular, to a port matching method and apparatus.

Background technique

With the rapid growth of metropolitan area network traffic, the demand for introducing Wavelength Division Multiplexing (WDM) technology into metro optical networks is becoming stronger. Different from the point-to-point wavelength division multiplexing system, the metropolitan wavelength division multiplexing system has unique requirements in terms of network structure, networking cost and transmission technology. At one end of the metropolitan wavelength division multiplexing system, transceivers of different wavelengths are concentrated in the central office, which is called Head End (English: Head End, referred to as HE). The other end of the metropolitan wavelength division multiplexing system is distributed at each end (English: Tail end, referred to as: TE) node. The up and down waves of the respective wavelength signals are completed at the tail end by various wavelength division multiplexing devices.

Since the tail end of the metro optical network is distributed in different geographical locations, each tail device (English: TE Equipment, referred to as TEE) is allocated to different wavelengths for information transmission. If the TEE adopts the traditional fixed wavelength optical transceiver module, it will increase the operator's installation, operation and maintenance and stocking costs. Therefore, for cost and ease of maintenance considerations, operators need TEE to be a normalized, plug-and-play colorless optical module. Among the many colorless wavelength division transmission schemes, wavelength tunable lasers have become one of the main choices for their excellent performance. At the same time, in order to reduce the cost of the wavelength tunable laser, the wavelength locking device and associated control circuitry in each wavelength tunable laser can be removed. This not only reduces the hardware cost of the wavelength tunable laser, but also reduces the adjustment, calibration and test costs in the production process to meet the needs of low-cost metro wavelength division multiplexing systems.

When a TEE with wavelength tuning capability is connected to a tail port in a metro wave optical network, how to implement plug and play, the TEE automatically matches the wavelength of the transmitted light to the wavelength channel corresponding to the tail port, and becomes a waiting Research questions.

A port automatic matching technical solution provided by the prior art includes: detecting whether an optical signal is received by the TEE. When no optical signal is received, the TEE remains stopped and continuously detects whether light is received. signal. When the optical signal is received, the counter i is set to 1, and the TEE begins wavelength scanning. The TEE first sets the transmission wavelength to the first optical wavelength channel in a series of optical wavelength channels (depending on the number of wavelengths of the WDM system), and transmits the identity information using the new pilot channel while receiving command information from the received optical signal.

The head-end device (English: HE Equipment, referred to as HEE) first detects the wavelength information of the newly accessed TEE optical signal on an optical spectrum analyzer (OSA). When multiple new access wavelengths occur, HEE sends a "new access TEE stops transmitting optical signals and waits" command to all TEEs. At this point, all new access TEEs will stop sending optical signals and wait for a random time. When there is only one new access wavelength, the HEE continuously reads the identity information from the new pilot channel. After successfully reading the identity information of the newly accessed TEE, the HEE performs a lookup table, allocates a pilot frequency to the newly accessed TEE, and sends information using the pilot frequency to the new access TEE. When the identity information in the information received by the TEE is its own, the received pilot frequency is added to the transmitted signal, and the TEE uses the pilot frequency to send the acknowledgement information. HEE reads the pilot information to see if there is a confirmation message. When the confirmation message is found, the matching process ends. Otherwise, the HEE continuously transmits information using the pilot frequency to the new access TEE and reads the pilot information.

When the identity information in the information received by the TEE is not its own, after a certain time interval, the counter automatically increments by 1, and sets the transmission wavelength to the second optical wavelength channel, and continues the above scanning step until the correct identity information is received.

In this scheme, when multiple new access wavelengths appear, all TEEs continue to send scanning optical signals after waiting for a random time. However, there is still a risk of conflict between the TEEs sent after waiting, and the need to continue to wait, such a loop causes the port matching to fail or the matching is successful but the matching time is too long.

Summary of the invention

The embodiment of the invention provides a port matching method and device, which are used to solve the technical problem that the port matching in the prior art is easy to fail or the matching time is too long.

A first aspect of the present invention provides a port matching method, including:

The head end device HEE sends the first pilot parameter and the first scan parameter to the n tail device TEEs respectively. And the first scan frequency, the first pilot frequency includes a first pilot frequency, and the first pilot frequency corresponding to each TEE is different from each other; the first scan parameter includes a first scan step and a first scan Range; n is a positive integer;

The HEE receives a first scan optical signal that is sent by each of the n TEEs by using the first scan parameter, where the first scan optical signal sent by each of the m TEEs includes the Information of the first pilot frequency of each TEE; m is a positive integer less than or equal to n;

Determining, according to the first scanning optical signal, whether the wavelength of the transmitting light of the first TEE matches the target wavelength channel;

When the first TEE is present, a stop scan command is sent to the first TEE.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining, by the HEE, whether the wavelength of the transmitting light of the first TEE matches the target wavelength channel, according to the first scanning optical signal, includes:

The HEE processes the first scan signal to obtain a first electrical signal;

Determining, by the HEE, whether an amplitude value of the first electrical signal at a first pilot frequency corresponding to each TEE exceeds a preset threshold; wherein, when the amplitude value exceeds the preset threshold, indicating that the The transmit light wavelength of the first TEE matches the target wavelength channel, and the TEE corresponding to the first pilot frequency whose amplitude value exceeds the preset value is the first TEE.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, when the first TEE is present, sending a stop scan to the first TEE Before the command, the method further includes:

The HEE sends a second scan parameter to the first TEE, wherein the second scan parameter includes a second scan step and a second scan range; the second scan step is smaller than the first scan step And/or the second scan range is smaller than the first scan range;

The HEE receives a second scan optical signal sent by the first TEE with the second scan parameter;

When the HEE determines that the first TEE scans within the second scan range, the second electrical signal corresponding to the second scan optical signal has an amplitude at a first pilot frequency corresponding to the first TEE. To the maximum.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the HEE determines that the first TEE scans within the second scan range, The amplitude of the second electrical signal corresponding to the second scanning optical signal reaches a maximum at the first pilot frequency corresponding to the first TEE, including:

When the HEE determines that the first TEE completes one scan in the second scan range, the second electrical signal corresponding to the second scan optical signal is at the first pilot frequency corresponding to the first TEE. Maximum amplitude;

Determining, by the HEE, that the second electrical signal corresponding to the second scanning optical signal is at a first pilot frequency corresponding to the first TEE when the first TEE performs a second scanning in the second scanning range. The amplitude at which the maximum is reached.

In conjunction with the second possible implementation of the first aspect, or the third possible implementation of the first aspect, in a fourth possible implementation of the first aspect, the method further includes:

The HEE obtains a third electrical signal after performing photoelectric conversion on the second scanning optical signal of the wavelength calibration device;

The HEE acquires the third electrical signal and the second electrical signal when the amplitude of the second electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE;

The HEE determines wavelength deviation information according to the third electrical signal and the second electrical signal;

The HEE transmits the wavelength deviation information to the first TEE to enable the first TEE to adjust the current wavelength according to the wavelength deviation information.

With the second possible implementation of the first aspect, the fourth possible implementation of the first aspect, in a fifth possible implementation of the first aspect, the method further includes:

And obtaining, by the HEE, an optical power of the second scanning optical signal corresponding to the second electrical signal when the amplitude reaches the maximum value;

Determining, by the HEE, a target received optical power; wherein the target received optical power is greater than a sum of a receiving sensitivity of a normal transmission of the service data and an equivalent power cost of the transmission link, and is smaller than the first TEE The difference between the minimum transmitted optical power and the maximum uplink loss, and the HEE received optical power detection error;

Determining, by the HEE, power adjustment information according to a difference between the optical power and the target received optical power;

The HEE sends the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information.

In conjunction with the first aspect, or the second possible implementation of the first aspect, to any one of the fifth possible implementations of the first aspect, in a sixth possible implementation of the first aspect, The head end device HEE sends the first pilot parameter, the first scan parameter, and the start scan command to the n tail end devices TEE, respectively, including:

The HEE sends a first pilot parameter, a first scan parameter, and a start scan command to the n TEEs through the control information channel CIC.

In conjunction with the sixth possible implementation of the first aspect, in a seventh possible implementation manner of the first aspect, the first pilot parameter is sent to the n TEEs by the HEE through the control information channel CIC, Before the first scan parameter and the start of the scan command, the method further includes:

The HEE uses a low frequency, low modulation depth signal to amplitude modulate the intensity of the traffic data optical signal to generate the CIC.

With reference to the first aspect, or the second possible implementation of the first aspect, to any one of the seventh possible implementations of the first aspect, in an eighth possible implementation manner of the first aspect, The method also includes:

Transmitting, by the HEE, the transmit optical power of the HEE or the transmit optical power range of the HEE to the n TEEs, respectively, to enable the n TEEs to be based on the transmit optical power of the HEE or the transmission of the HEE The optical power range determines its own initial transmitted optical power.

With reference to the first aspect, in a ninth possible implementation manner of the first aspect, when the first TEE is present, before the sending the stop scan command to the first TEE, the method further includes:

Determining, by the HEE, that the first electrical signal corresponding to the first scanning optical signal is at a first pilot frequency corresponding to the first TEE when the first TEE scans in the first scanning range The amplitude reaches the maximum.

In conjunction with the ninth possible implementation of the first aspect, in a tenth possible implementation manner of the first aspect, the HEE determines, when the first TEE scans in the first scanning range, The amplitude of the first electrical signal corresponding to the first scanning optical signal at the first pilot frequency corresponding to the first TEE reaches a maximum value, including:

Determining, by the HEE, that after the first TEE completes one scan in the first scan range, the first electrical signal corresponding to the first scan optical signal is at a first pilot frequency corresponding to the first TEE Maximum amplitude;

Determining, by the HEE, that the first electrical signal corresponding to the first scanning optical signal is at a first pilot frequency corresponding to the first TEE, when the first TEE performs a second scanning in the first scanning range. The amplitude at which the maximum is reached.

With reference to the ninth possible implementation of the first aspect, or the tenth possible implementation manner of the first aspect, in the eleventh possible implementation manner of the first aspect, the method further includes:

The HEE obtains a fourth electrical signal after performing photoelectric conversion on the first scanning optical signal of the wavelength calibration device;

The HEE acquires the fourth electrical signal and the first electrical signal when the amplitude of the first electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE;

The HEE determines wavelength deviation information according to the fourth electrical signal and the first electrical signal;

The HEE transmits the wavelength deviation information to the first TEE to enable the first TEE to adjust the current wavelength according to the wavelength deviation information.

With reference to any one of the ninth possible implementation of the first aspect to the eleventh possible implementation of the first aspect, in a twelfth possible implementation of the first aspect, the method further include:

And acquiring, by the HEE, an optical power of the first scanning optical signal corresponding to the first electrical signal when the amplitude reaches the maximum value;

Determining, by the HEE, a target received optical power, wherein the target received optical power is greater than a sum of a receiving sensitivity of a normal transmission of the service data and an equivalent power cost of the transmission link, and a minimum transmission optical power and a maximum uplink of the first TEE. Link loss, difference between the HEE received optical power detection error;

Determining, by the HEE, power adjustment information according to a difference between the optical power and the target received optical power;

The HEE sends the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information.

With reference to the first aspect, in a thirteenth possible implementation manner of the first aspect, when m is less than n, the m TEEs in the HEE receiving the n TEEs are respectively sent by using the first scanning parameter Before the first scanning optical signal, the method further includes:

The HEE sends a target wavelength to the n TEEs respectively; wherein the target wavelength is a wavelength to which each TEE is to be tuned, and the target wavelengths corresponding to each TEE are different from each other;

The HEE receives the respective reported optical signals of the n-m TEEs respectively sent by the n-m TEEs, where the reported optical signals correspond to respective first pilot frequencies, and the reported optical signals are used to indicate the n -m TEEs have a wavelength lock function;

The HEE sends a scan stop command to the n-m TEEs according to the reported optical signal.

In conjunction with the thirteenth possible implementation of the first aspect, in a fourteenth possible implementation manner of the first aspect, the method further includes:

The HEE obtains a first reported electrical signal after performing photoelectric conversion on the reported optical signal of the wavelength calibration device;

The HEE performs photoelectric conversion on the reported optical signal to obtain a second reported electrical signal;

Determining, by the HEE, wavelength deviation information according to the first reporting electrical signal and the second reporting electrical signal;

The HEE sends the wavelength deviation information to a corresponding TEE, respectively, so that the n-m TEEs can adjust the target wavelength according to the corresponding wavelength deviation information.

In conjunction with any one of the thirteenth possible implementation of the first aspect or the fourteenth possible implementation of the first aspect, in a fifteenth possible implementation of the first aspect, the method Also includes:

The HEE acquires optical power of the reported optical signal;

Determining, by the HEE, a target received optical power; wherein the target received optical power is greater than a service number The difference between the receiving sensitivity of the normal transmission and the equivalent power cost of the transmission link, and the difference between the minimum transmission optical power and the maximum uplink loss in the n-m TEEs, and the detection error of the HEE receiving optical power;

Determining, by the HEE, power adjustment information according to a difference between the optical power and the target received optical power;

The HEE sends the power adjustment information to the n-m TEEs respectively, so that the n-m TEEs adjust the transmit optical power according to the corresponding power adjustment information.

With reference to the thirteenth possible implementation of the first aspect, to any one of the fifteenth possible implementation of the first aspect, in a sixteenth possible implementation manner of the first aspect, The pilot parameter further includes a first pilot modulation depth, and the method further includes:

The HEE sends a second pilot parameter and a normal service transmission command to the n-m TEEs, where the second pilot parameter includes a second pilot depth; the second pilot depth is less than the The first pilot modulation depth.

In combination with the first aspect or the first possible implementation of the first aspect to any one of the twelfth possible implementations of the first aspect, in a seventeenth possible implementation of the first aspect, The first pilot parameter further includes a first pilot modulation depth, and the method further includes:

The HEE sends a second pilot parameter and a normal service transmission command to the first TEE; wherein the second pilot parameter includes a second pilot depth; the second pilot depth is smaller than the first pilot Frequency modulation depth.

With reference to the first aspect or the first possible implementation of the first aspect to any one of the seventeenth possible implementations of the first aspect, in an eighteenth possible implementation of the first aspect, The method further includes:

The HEE receives a transmission request sent by a second TEE of the n TEEs; the transmission request is used to request to report information from the reporting information channel RMC;

The HEE sends an acknowledgement message to the second TEE to instruct the second TEE to report information through the RMC.

A second aspect of the present invention provides a port matching method, including:

The tail device TEE receives the first pilot parameter and the first scan parameter sent by the head device HEE; wherein the first pilot parameter includes a first pilot frequency; the first scan parameter includes a first scan step and a first a scan range;

When the TEE receives the start scan command sent by the HEE, and the TEE is a TEE without a wavelength lock function, the first scan is started according to the first pilot frequency and the first scan parameter. An optical signal to the HEE;

When receiving the stop scan command sent by the HEE, the TEE stops the wavelength scanning and keeps the current wavelength unchanged.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the method further includes:

The TEE continuously detects whether a second scan parameter sent by the HEE is received while transmitting a scan optical signal to the HEE according to the first pilot frequency and the first scan parameter; wherein The second scan parameter includes a second scan step and a second scan range;

And when the second scan parameter is different from the first scan parameter, the TEE starts to send a second scan optical signal to the HEE according to the first pilot frequency and the second scan parameter.

With reference to the second aspect, in a second possible implementation manner of the second aspect, when the TEE is a TEE having a wavelength locking function, the method further includes:

Receiving, by the TEE, a target wavelength sent by the HEE;

The TEE tunes its own transmission wavelength to the target wavelength;

The TEE sends a report optical signal to the HEE according to the first pilot frequency when receiving the start scan command sent by the HEE; wherein the reported optical signal is used to indicate that the TEE has a wavelength lock Functional TEE;

When receiving the stop scan command sent by the HEE, the TEE stops transmitting the reported optical signal and keeps the current wavelength unchanged.

With reference to the second aspect, or the first possible implementation of the second aspect, or the second possible implementation of the second aspect, in a third possible implementation of the second aspect, the method further includes:

After receiving the wavelength deviation information or power adjustment information sent by the HEE, the TEE Adjusting the current wavelength according to the wavelength deviation information, or adjusting the transmit optical power of the TEE according to the power adjustment information.

In combination with the second aspect or the first possible implementation of the second aspect to any one of the third possible implementations of the second aspect, in a fourth possible implementation of the second aspect, Before the start of the scan command sent by the HEE, the method further includes:

Receiving, by the TEE, initial power adjustment information sent by the HEE;

The TEE determines an initial transmit optical power of the TEE according to the initial power adjustment information.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the initial power adjustment information is a transmit optical power of the HEE, and the TEE is based on the initial power The adjustment information determines the initial transmitted optical power of the TEE, including:

Determining, by the TEE, a link loss according to the transmit optical power and the received optical power of the TEE;

The TEE determines that the initial transmitted optical power is a value that is not less than a sum of a minimum optical power, a link loss, and a power margin of the scanning optical signal of the TEE reaching the HEE.

With reference to the fourth possible implementation of the second aspect, in a sixth possible implementation manner of the second aspect, the initial power adjustment information is a transmit optical power range of the HEE, and the TEE is based on the initial The power adjustment information determines an initial transmit optical power of the TEE, including:

The TEE determines that any of the transmit optical powers within the transmit optical power range of the HEE is the initial transmit optical power.

With reference to the second aspect, or the first possible implementation of the second aspect, to any one of the sixth possible implementations of the second aspect, in a seventh possible implementation of the second aspect, The method also includes:

The TEE sends a transmission request to the HEE; the transmission request is used to request reporting information from the reporting information channel RMC;

After receiving the acknowledgement information sent by the HEE, the TEE sends the report information to the HEE through the RMC.

With reference to the second aspect or the first possible implementation of the second aspect to any one of the sixth possible implementations of the second aspect, in an eighth possible implementation of the second aspect, The method also includes:

The TEE sends the report information to the HEE by reporting the information channel RMC.

With reference to the seventh possible implementation of the second aspect, or the eighth possible implementation of the second aspect, in a ninth possible implementation manner of the second aspect, the method further includes:

The TEE uses a low frequency, low modulation depth signal to amplitude modulate the intensity of the traffic data optical signal to generate the RMC.

With reference to the second aspect, or the first possible implementation of the second aspect, to any one of the ninth possible implementation of the second aspect, in a tenth possible implementation manner of the second aspect, The first pilot parameter further includes a first pilot modulation depth, and after the stopping wavelength scanning, the method further includes:

After receiving the second pilot parameter and the normal service sending command sent by the HEE, the TEE starts to send a normal service optical signal and continuously generates a corresponding pilot signal according to the second pilot parameter; The second pilot parameter includes a second pilot modulation depth, the second pilot modulation depth being less than the first pilot modulation depth.

With reference to the second aspect or the first possible implementation of the second aspect to any one of the tenth possible implementation of the second aspect, in an eleventh possible implementation of the second aspect, Before the TEE receives the start scan command sent by the HEE, the method further includes:

The TEE performs parameter configuration on the TEE according to the first pilot parameter and the first scan parameter;

When the TEE receives the shutdown command sent by the HEE, the parameter configuration process is stopped and the previous configuration is cleared.

With reference to the second aspect or the first possible implementation of the second aspect to any one of the eleventh possible implementation manners of the second aspect, in a twelfth possible implementation manner of the second aspect, The method further includes:

In the process of stopping the wavelength scanning, when the TEE receives the abnormal command sent by the HEE, the TEE stops transmitting the first scanning optical signal and receives new tuning information sent by the HEE and new Start scanning command and send new scanning light according to the new tuning information Signaling to the HEE; the tuning information includes a pilot parameter and a scan parameter; the abnormal command includes any one or any combination of a target wavelength, a pilot parameter, a power initialization command, and a start scan command.

A third aspect of the present invention provides a head end device HEE, including:

An optical transmitter, configured to separately send a first pilot parameter, a first scan parameter, and a start scan command to the n tail end devices TEE; the first pilot parameter includes a first pilot frequency, and each TEE corresponds to a first One pilot frequency is different from each other; the first scan parameter includes a first scan step and a first scan range; n is a positive integer;

a wavelength locking unit, configured to receive a first scanning optical signal that is sent by each of the n TEEs by the first scanning parameter, where the first scanning optical signal sent by each of the m TEEs The information includes a first pilot frequency of each of the TEEs; m is a positive integer less than or equal to n; and determining, according to the first scanning optical signal, whether a transmitting optical wavelength of the first TEE matches a target wavelength channel;

And a controller, configured to, when the first TEE is present, control the optical transmitter to send a stop scan command to the first TEE.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the wavelength locking unit includes a first photoelectric conversion device and a processing circuit,

The first photoelectric conversion device is configured to process the first scan signal to obtain a first electrical signal;

The processing circuit is configured to determine whether an amplitude value of the first electrical signal at a first pilot frequency corresponding to each TEE exceeds a preset threshold; wherein, when an amplitude value exceeds the preset threshold And indicating that the transmitting light wavelength of the first TEE is matched with the target wavelength channel, and the TEE corresponding to the first pilot frequency whose amplitude value exceeds the preset value is the first TEE.

In conjunction with the first possible implementation of the third aspect, in a second possible implementation of the third aspect,

The control unit is further configured to: when the first TEE is present, control the optical transmitter to send to the first TEE before controlling the optical transmitter to send a stop scan command to the first TEE Sending a second scan parameter, wherein the second scan parameter includes a second scan step and a second scan range; the second scan step is smaller than the first scan step, and/or the second scan The range is smaller than the first scanning range;

The first photoelectric conversion device is further configured to receive a second scan light signal sent by the first TEE by the second scan parameter;

The processing circuit is further configured to: when the first TEE is scanned in the second scan range, the second electrical signal corresponding to the second scan optical signal is at the first pilot frequency corresponding to the first TEE The amplitude is at its maximum.

In conjunction with the second possible implementation of the third aspect, in a third possible implementation of the third aspect, the processing circuit is configured to:

Determining that when the first TEE completes one scan in the second scanning range, the second electrical signal obtained by photoelectrically converting the second scanning optical signal by the first photoelectric conversion device is in the first TEE a maximum amplitude at a corresponding first pilot frequency; and determining that the second TEE is performed by the first photoelectric conversion device when the first TEE performs a second scan within the second scan range The amplitude of the second electrical signal obtained by photoelectrically converting the signal at the first pilot frequency corresponding to the first TEE reaches the maximum value.

In conjunction with the second possible implementation of the third aspect, or the third possible implementation of the third aspect, in a fourth possible implementation of the third aspect, the wavelength locking unit further includes a wavelength calibration device and a second photoelectric conversion device,

The second photoelectric conversion device is configured to perform photoelectric conversion on the second scanning optical signal passing through the wavelength calibration tool to obtain a third electrical signal;

The processing circuit is further configured to: acquire the third electrical signal and the second electrical signal when the amplitude of the second electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE a signal; determining wavelength deviation information according to the third electrical signal and the second electrical signal;

The controller is further configured to: control the optical transmitter to send the wavelength deviation information to the first TEE, so that the first TEE can adjust the current wavelength according to the wavelength deviation information.

Combining the second possible implementation of the third aspect to the fourth possible implementation of the third aspect In a fifth possible implementation manner of the third aspect, the processing circuit is further configured to: acquire the second corresponding to the second electrical signal when the amplitude reaches the maximum value And scanning the optical power of the optical signal; determining the target received optical power; wherein the target received optical power is greater than a sum of a receiving sensitivity of the normal transmission of the service data and an equivalent power cost of the transmission link, and a minimum transmission light smaller than the first TEE a difference between power and maximum uplink loss, the HEE received optical power detection error; determining power adjustment information according to a difference between the optical power and the target received optical power;

The controller is further configured to: control the optical transmitter to send the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information.

With reference to the third aspect, or the first possible implementation manner of the third aspect, to any one of the fifth possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, The optical transmitter transmits a first pilot parameter, a first scan parameter, and a start scan command to the n TEEs through the control information channel CIC.

In conjunction with the sixth possible implementation of the third aspect, in a seventh possible implementation of the third aspect, the HEE further includes a modulation driver for using a low frequency, low modulation depth signal to the service data light The intensity of the signal is amplitude modulated to generate the CIC.

With reference to the third aspect, or the first possible implementation of the third aspect, to any one of the seventh possible implementations of the third aspect, in an eighth possible implementation manner of the third aspect, The controller is further configured to: control the optical transmitter to separately send the transmit optical power of the HEE or the transmit optical power range of the HEE to the n TEEs; so that the n TEEs can be based on the HEE The transmitted optical power or the transmitted optical power range of the HEE determines its own initial transmitted optical power.

In conjunction with the third aspect, in a ninth possible implementation manner of the third aspect, the wavelength locking unit further includes a first photoelectric conversion device and a processing circuit,

The processing circuit is configured to determine a first electrical signal obtained by photoelectrically converting the first scanning optical signal by the first photoelectric conversion device when the first TEE scans within the first scanning range The amplitude at the first pilot frequency corresponding to the first TEE reaches a maximum value.

In conjunction with the ninth possible implementation of the third aspect, the tenth possible implementation in the third aspect In a current mode, the processing circuit is configured to: after the first TEE completes one scan in the first scan range, perform photoelectric conversion on the first scan optical signal by using the first photoelectric conversion device. a maximum amplitude of the obtained first electrical signal at a first pilot frequency corresponding to the first TEE; and determining that the first TEE performs a second scan within the first scanning range, A first electrical signal obtained by photoelectrically converting the first scanning optical signal by a photoelectric conversion device reaches an amplitude at a first pilot frequency corresponding to the first TEE.

With reference to the ninth possible implementation manner of the third aspect, or the tenth possible implementation manner of the third aspect, in the eleventh possible implementation manner of the third aspect, the wavelength locking unit further includes a wavelength calibration device And a second photoelectric conversion device,

The second photoelectric conversion device is configured to perform photoelectric conversion after the first scanning optical signal passing through the wavelength calibration device to obtain a fourth electrical signal;

The processing unit is further configured to: acquire the fourth electrical signal and the first electrical signal when the amplitude of the first electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE a signal; determining wavelength deviation information according to the fourth electrical signal and the first electrical signal;

The controller is further configured to: control the optical transmitter to send the wavelength deviation information to the first TEE, so that the first TEE can adjust the current wavelength according to the wavelength deviation information.

With reference to the tenth possible implementation manner of the third aspect, or the eleventh possible implementation manner of the third aspect, in the twelfth possible implementation manner of the third aspect, the processing circuit is further configured to: obtain The optical power of the first scanning optical signal corresponding to the first electrical signal when the amplitude reaches the maximum value; determining the target receiving optical power; wherein the target receiving optical power is greater than the receiving sensitivity of the normal transmission of the service data a sum of equivalent transmission power costs of the transmission link, a difference between a minimum transmission optical power of the first TEE and a maximum uplink loss, and a detection error of the HEE received optical power; receiving light according to the optical power and the target The difference in power determines power adjustment information;

The controller is further configured to: control the optical transmitter to send the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information.

With reference to the third aspect, in a thirteenth possible implementation manner of the third aspect, when m is less than n, the controller is further configured to: control the optical transmitter to separately send a target wave to the n TEEs Long; wherein, the target wavelength is a wavelength to which each TEE is to be tuned, and the target wavelengths corresponding to each TEE are different from each other;

The wavelength locking unit is configured to receive respective reported optical signals of the n-m TEEs respectively sent by the n-m TEEs, where the reported optical signals correspond to respective first pilot frequencies, and the reported optical signals are used for Instructing the n-m TEEs to have a wavelength locking function;

The controller is further configured to control the optical transmitter to send a scan stop command to the n-m TEEs according to the reported optical signal.

In conjunction with any of the twelfth possible implementation of the third aspect or the thirteenth possible implementation of the third aspect, in the fourteenth possible implementation of the third aspect, the wavelength The locking unit includes a wavelength calibration tool, a first photoelectric conversion device, a second photoelectric conversion device, and a processing circuit.

The second photoelectric conversion device is configured to perform photoelectric conversion on the reported optical signal passing through the wavelength calibration tool to obtain a first reported electrical signal;

The first photoelectric conversion device is configured to perform photoelectric conversion on the reported optical signal to obtain a second reported electrical signal;

The processing circuit is configured to determine wavelength deviation information according to the first reporting electrical signal and the second reporting electrical signal;

The controller is further configured to: control the optical transmitter to separately send the wavelength deviation information to a corresponding TEE, so that the n-m TEEs can adjust the target wavelength according to the corresponding wavelength deviation information. .

In conjunction with the thirteenth possible implementation of the third aspect or the fourteenth possible implementation of the third aspect, in a fifteenth possible implementation of the third aspect, the wavelength locking unit is further used Obtaining an optical power of the reported optical signal; determining a target received optical power; wherein the target received optical power is greater than a sum of a receiving sensitivity of a normal transmission of the service data and an equivalent power cost of the transmission link, and less than the n-m The difference between the minimum transmit optical power and the maximum uplink loss and the HEE received optical power detection error in the TEE; determining the power adjustment information according to the difference between the optical power and the target received optical power;

The controller is further configured to: control the optical transmitter to separately send the power adjustment information to the n-m TEEs, so that the n-m TEEs are adjusted according to the corresponding power adjustment information Send optical power.

With reference to the thirteenth possible implementation of the third aspect to any one of the fifteenth possible implementation of the third aspect, in a sixteenth possible implementation manner of the third aspect, The pilot parameter further includes a first pilot modulation depth, and the controller is further configured to: control the optical transceiver to separately send a second pilot parameter and a normal service sending command to the n-m TEEs; The second pilot parameter includes a second pilot depth; the second pilot depth is less than the first pilot modulation depth.

With reference to the third aspect or the first possible implementation of the third aspect to any one of the twelfth possible implementation manners of the third aspect, in the seventeenth possible implementation manner of the third aspect, The first pilot parameter further includes a first pilot modulation depth, and the controller is further configured to: control the optical transceiver to send a second pilot parameter and a normal service sending command to the first TEE; The second pilot parameter includes a second pilot depth; the second pilot depth is less than the first pilot modulation depth.

With reference to the third aspect or the first possible implementation of the third aspect to any one of the seventeenth possible implementation manners of the third aspect, in an eighteenth possible implementation manner of the third aspect, The HEE further includes an optical receiver, configured to receive a transmission request sent by a second one of the n TEEs, where the transmission request is used to request reporting information from the reporting information channel RMC;

The controller is further configured to: control the optical transmitter to send an acknowledgement message to the second TEE, to indicate that the second TEE reports information by using the RMC.

A fourth aspect of the present invention provides a tail end device TEE, including:

An optical receiver, configured to receive a first pilot parameter and a first scan parameter sent by the head end device HEE; wherein the first pilot parameter includes a first pilot frequency; and the first scan parameter includes a first scan step And the first scan range;

An optical transmitter, configured to: when receiving the start scan command sent by the HEE, and the TEE is a TEE having no wavelength locking function, according to the first pilot frequency and the first scan parameter The number begins to send a first scan light signal to the HEE;

And a controller, configured to control the optical transceiver to stop wavelength scanning when receiving the stop scan command sent by the HEE, and keep the current wavelength unchanged.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the controller is further configured to: when the optical transmitter sends a scanning optical signal to the HEE, by using the optical receiver Continuously detecting whether the second scan parameter of the HEE transmission is received; wherein the second scan parameter includes a second scan step and a second scan range; and the second scan parameter and the first scan parameter are not Simultaneously, controlling, by the first pilot frequency and the second scanning parameter, the optical transmitter to send a second scanning optical signal to the HEE.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, when the TEE is a TEE having a wavelength locking function, the optical receiver is further configured to: receive a target wavelength of the HEE transmission;

The controller is configured to control the optical transmitter to tune a transmission wavelength of the optical transmitter to the target wavelength;

The controller is further configured to: when receiving the start scan command of the HEE transmission, send, by the optical transmitter, a report optical signal to the HEE according to the first pilot frequency; wherein the report light The signal is used to indicate that the TEE is a TEE having a wavelength locking function; when receiving the stop scanning command sent by the HEE, the optical transmitter is controlled to stop transmitting the reported optical signal and keep the current wavelength unchanged.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the controller is further used to After receiving the wavelength deviation information or the power adjustment information sent by the HEE, adjusting the current wavelength according to the wavelength deviation information, or adjusting the transmission optical power of the optical transmitter according to the power adjustment information.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, to any one of the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, The optical receiver is further configured to: receive the start scan command before receiving the HEE transmission Initial power adjustment information sent by the HEE;

The controller is further configured to: determine an initial transmit optical power of the optical transmitter according to the initial power adjustment information.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the initial power adjustment information is a transmit optical power of the HEE, and the controller is configured to: Determining a link loss of the transmit optical power and the received optical power of the TEE; determining that the initial transmit optical power is not less than a minimum optical power, a link loss, and a power of the scan optical signal of the TEE reaching the HEE The value of the sum of the three balances.

With reference to the fourth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the initial power adjustment information is a transmit optical power range of the HEE, and the controller is configured to: The TEE determines that any of the transmit optical powers within the transmit optical power range of the HEE is the initial transmit optical power.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, to any one of the sixth possible implementation manner of the fourth aspect, The controller is further configured to: send, by the optical transmitter, a transmission request to the HEE; the transmission request is used to request reporting information from the reporting information channel RMC; and after receiving the confirmation information sent by the HEE, The RMC sends the report information to the HEE.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, to any one of the seventh possible implementation manners of the fourth aspect, in the eighth possible implementation manner of the fourth aspect, The controller is further configured to: send the report information to the HEE by reporting the information channel RMC.

In conjunction with the seventh possible implementation of the fourth aspect, or the eighth possible implementation of the fourth aspect, in a ninth possible implementation manner of the fourth aspect, the TEE further includes a modulation driver for use A low frequency, low modulation depth signal amplitude modulates the intensity of the traffic data optical signal to generate the RMC.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, to any one of the ninth possible implementation manner of the fourth aspect, The first pilot parameter further includes a first pilot modulation depth, and the controller is further configured to: when receiving the location After the second pilot parameter sent by the HEE and the normal service sending command, the optical transmitter is controlled to start transmitting a normal service optical signal and continuously generate a corresponding pilot signal according to the second pilot parameter; wherein, the second The pilot parameters include a second pilot modulation depth, the second pilot modulation depth being less than the first pilot modulation depth.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, to any one of the tenth possible implementation manners of the fourth aspect, in the eleventh possible implementation manner of the fourth aspect, The controller is further configured to perform parameter configuration on the optical transmitter according to the first pilot parameter and the first scan parameter; and stop when the optical receiver receives the shutdown command sent by the HEE The parameter configuration process clears the previous configuration.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, to any one of the eleventh possible implementation manners of the fourth aspect, in a twelfth possible implementation manner of the fourth aspect, The optical receiver is further configured to: in the process of stopping the wavelength scanning, when receiving the abnormal command sent by the HEE, the controller controls the optical transmitter to stop transmitting the first scanning optical signal And controlling the optical receiver to receive new tuning information sent by the HEE and a new start scan command; the optical transmitter is further configured to: send a new scan optical signal to the new tuning information according to the new tuner information HEE; the tuning information includes a pilot parameter and a scan parameter; the abnormal command includes any one or any combination of a target wavelength, a pilot parameter, a power initialization command, and a start scan command.

One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

In the embodiment of the present invention, the HEE allocates a first pilot frequency different from each other for each TEE, and multiple TEEs can simultaneously transmit the first scanning optical signal to the HEE based on the first pilot frequency of the TEE, and the HEE can A plurality of TEEs are simultaneously judged based on the first pilot frequency of each TEE to match the target wavelength channel. Therefore, the method in the embodiment of the present invention can support parallel channel matching of multiple TEEs, the matching success rate is high, and the matching speed is fast.

DRAWINGS

FIG. 1 is a structural diagram of a WDM optical network according to an embodiment of the present invention;

2 is a flowchart of a port matching method on a HEE side according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method for port matching on a TEE side according to an embodiment of the present invention;

FIG. 4 is a flowchart of another method for port matching on a TEE side according to an embodiment of the present invention;

FIG. 5 is a schematic implementation flowchart of port matching on the HEE side according to an embodiment of the present invention;

FIG. 6 is a schematic implementation flowchart of port matching on a TEE side according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a working state relationship of an HEE according to an embodiment of the present invention; FIG.

FIG. 8 is a diagram of a working state relationship of a TEE according to an embodiment of the present invention;

FIG. 9 is a functional block diagram of a port matching apparatus according to an embodiment of the present invention;

FIG. 10 is a functional block diagram of another port matching apparatus according to an embodiment of the present invention;

FIG. 11 is a structural diagram of a wavelength locking unit according to an embodiment of the present invention;

FIG. 12 is a structural block diagram of a TEE according to an embodiment of the present invention.

detailed description

The embodiment of the invention provides a port matching method and device, which are used to solve the technical problem that the port matching in the prior art is easy to fail or the matching time is too long.

To solve the above technical problem, the main ideas of the technical solution of the embodiment of the present invention are as follows:

The HEE allocates a different first pilot frequency for each TEE, and multiple TEEs can simultaneously transmit the first scanning optical signal to the HEE based on its own first pilot frequency, and the HEE can be based on the first of each TEE. The pilot frequency simultaneously determines whether multiple TEEs match the target wavelength channel. Therefore, the method in the embodiment of the present invention can support parallel channel matching of multiple TEEs, the matching success rate is high, and the matching speed is fast.

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. based on All other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.

In addition, the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist at the same time. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

Please refer to FIG. 1 , which is a schematic structural diagram of a WDM optical network according to an embodiment of the present invention. The optical network includes HEE, transmission links, TEE, and power splitters. HEE includes n modulation drivers (English: Modulation Driver, MD for short), n optical transceivers with different wavelengths, optical multiplexers (English: Optical Multiplexer, OM for short), optical demultiplexers (English: Optical Demultiplexer) , referred to as: OD), controller and wavelength locking unit (English: Wavelength locking unit, referred to as: WLU). Where n is a positive integer.

The output ends of the n MDs are respectively connected to the n optical transceivers in one-to-one correspondence. In particular, each optical transceiver can include an optical transmitter and an optical receiver that are physically separate or integrated with each other. The output of the MD is connected to the optical transmitter of the optical transceiver. The first input of the MD is for receiving a service data optical signal. The second input of the MD is connected to the controller.

The n optical transceivers are in one-to-one correspondence with the n head-end ports, and the n optical transceivers are connected to the OM/OD. The OD is used to demultiplex the uplink wavelength division multiplexed signals and transmit them to the corresponding optical transceivers. The OM is used to wavelength division multiplex the n optical signals output by the n optical transceivers to form a downlink wavelength division multiplexed signal.

The number of TEEs is n, and each TEE has a one-to-one correspondence with one tail port. In other words, n TEEs are in one-to-one correspondence with n optical transceivers, so HEE can communicate with n TEEs through n optical transceivers, respectively.

In practice, the controller and the WLU can be physically separate or integrated. The controller and the n MDs may be physically independent of each other or may be integrated.

The power splitter can be part of the HEE or part of the transmission link. Power splitter The two outputs are connected to WLU, OM/OD, respectively. One end of the connection with the OM/OD is bidirectional, and the end connected to the WLU is unidirectional, from the splitter to the WLU.

The transmission link can be a plurality of network topologies such as a ring, a chain, and a tree.

Next, please refer to FIG. 2, which is a flowchart of a port matching method according to an embodiment of the present invention. In the present embodiment, the method shown in FIG. 2 is applied to the HEE as shown in FIG. 1. As shown in Figure 2, the method includes:

Step 11: The HEE sends the first pilot parameter, the first scan parameter, and the start scan command to the n TEEs respectively. The first pilot parameter includes the first pilot frequency, and the first pilot frequency corresponding to each TEE is different from each other. The first scan parameter includes a first scan step and a first scan range;

Step 12: The HEE receives a first scan optical signal that is sent by each of the m TEEs of the n TEEs with the first scan parameter, where the first scan optical signal sent by each of the m TEEs includes the first guide of each TEE. Frequency frequency information; m is a positive integer less than or equal to n;

Step 13: The HEE determines, according to the first scanning optical signal, whether the wavelength of the transmitting light of the first TEE matches the target wavelength channel;

Step 14: When the first TEE is present, a stop scan command is sent to the first TEE.

Optionally, before step 12, for example, in step 11, the HEE further sends the target wavelength to the n TEEs respectively; wherein the target wavelength is the wavelength to which each TEE is to be tuned, and the target wavelength corresponding to each TEE is not the same.

Specifically, when the HEE also sends the target wavelength to each TEE before the step 12, the processing flow on the TEE side is different according to whether the TEE has the wavelength locking capability. For a TEE that does not have a wavelength locking capability or a wavelength locking capability, refer to FIG. 3, which is a flowchart of a method for port matching on the TEE side according to an embodiment of the present invention. When the target wavelength is not transmitted before step 12, the processing flow on the TEE side is the same as that shown in FIG. 3 regardless of whether or not the wavelength locking function is provided.

As shown in FIG. 3, the method includes:

Step 21: The TEE receives the first pilot parameter and the first scan parameter sent by the HEE, where the first pilot parameter includes a first pilot frequency, where the first scan parameter includes a first scan step and a first scan range.

Step 22: Upon receiving the start scan command of the HEE transmission, start transmitting the first scan optical signal to the HEE according to the first pilot frequency and the first scan parameter;

Step 23: When receiving the stop scan command sent by the HEE, the TEE stops the wavelength scanning and keeps the current wavelength unchanged.

For the TEE with the wavelength locking function, the processing method shown in FIG. 4 can also be adopted, and the method includes:

Step 31: The TEE receives the target wavelength, the first pilot parameter, and the first scan parameter sent by the HEE. The first pilot parameter includes a first pilot frequency. The first scan parameter includes a first scan step and a first scan. range;

Step 32: The TEE tunes its own transmission wavelength to the target wavelength;

Step 33: The TEE sends a report optical signal to the HEE according to the first pilot frequency when receiving the start scan command of the HEE transmission; wherein, the reported optical signal is used to indicate that the TEE is a TEE having a wavelength locking function;

Step 34: When receiving the stop scan command sent by the HEE, the TEE stops transmitting the report optical signal and keeps the current wavelength unchanged.

In practical applications, all of the n TEEs may not have a wavelength locking function, and all may have a wavelength locking function, and may partially have a wavelength locking function. A TEE having a wavelength locking function can perform the method as shown in FIG.

The implementation process of port matching in the embodiment of the present invention will be described in detail below with reference to FIG. 2, FIG. 3 and FIG.

First, in step 11, the HEE may sequentially transmit the first pilot parameter, the first scan parameter, and the start scan command. Optionally, the first pilot parameter may further include a first pilot modulation depth. Optionally, the HEE also sends the target wavelength, and the target wavelength corresponding to each TEE is different.

Specifically, the HEE transmits the above tuning information through a control information channel (CIC).

The CIC may be specifically generated by HEE using a low frequency, low modulation depth signal to amplitude modulate the intensity of the traffic data optical signal. Alternatively, the low frequency may refer to a frequency having a frequency less than 50 MHz, and the modulation depth less than 50% may be considered as a low modulation depth.

Optionally, the signal may be, but is not limited to, a non-return to zero code signal, a sine wave signal.

In practical use, the CIC may be generated by controlling each MD by a control unit as shown in FIG. 1, and the tuning information corresponding to each TEE is carried on the CIC and transmitted through an optical transceiver corresponding to each TEE. Give the corresponding TEE.

For example, the target wavelength of TEE1 is λ1, and the corresponding first pilot frequency is f1. The target wavelength of TEE2 is λ2, and the corresponding first pilot frequency is f2. The scan parameters corresponding to different TEEs may be the same.

After the HEE transmits various tuning parameters in the above manner, correspondingly, step 21 or step 31 is performed on the TEE side. It should be noted that if the HEE is various tuning information transmitted by the CIC described above, on the TEE side, the data traffic signal can be filtered out by using a filter, and the tuning information can be obtained.

It should be noted that, after the step T21, before the TEE receives the start command of the HEE transmission, the TEE performs parameter configuration on the TEE according to the first pilot parameter and the first scan parameter. Specifically, for example, the scanning parameters of the optical transmitter of the TEE are configured according to the first scanning parameter. During the configuration process, when the TEE receives the shutdown command sent by HEE, it stops the parameter configuration process and clears the previous configuration. You can go back to step 21 again.

On the TEE side, according to the method shown in FIG. 3, after step 21, step 22 is performed to start transmitting the first scanning optical signal to the HEE according to the first pilot frequency and the first scanning parameter.

Specifically, the method includes: adjusting each parameter of the optical transmitter according to the first pilot parameter and the first scanning parameter, and then transmitting the first scanning optical signal to the HEE. That is, the wavelength scan is started.

In general, the TEE can start scanning from the smallest wavelength in the first scan range and then gradually increase in the first scan step.

The first scan optical signal includes information of a first pilot frequency of the corresponding TEE, and the information of the first pilot frequency is used by the HEE to distinguish each TEE.

After the TEE side sends the first scanning optical signal in step 22, correspondingly, on the HEE side, the HEE performs step 12, that is, receives the first scanning optical signal that the m TEEs of the n TEEs respectively transmit with the first scanning parameter. m TEEs are TEEs without wavelength locking function, and may also include TEE for wavelength lock function.

It should be noted that the receiving in step 12 may be received by the optical receiver, or may be received by the WLU as shown in FIG. 1. That is, the uplink first scanning optical signal directly enters the WLU through the power splitter.

Next, the HEE performs step 13 to determine whether the wavelength of the transmitted light of the first TEE matches the target wavelength channel based on the first scanned optical signal. Specifically, the HEE processes the first scan optical signal sent by each TEE to obtain a first electrical signal corresponding to each TEE; and the HEE determines that the first electrical signal is at a first pilot frequency corresponding to each TEE. Whether the amplitude value exceeds a preset threshold; wherein, when the amplitude value exceeds the preset threshold, indicating that the wavelength of the transmitted light of the first TEE is matched with the target wavelength channel, and the amplitude value exceeds the first at the preset threshold The TEE corresponding to the pilot frequency is the first TEE.

Because of the channel isolation of the wavelength division multiplexing device, if the wavelength of the transmitted light does not match the target wavelength channel, the power of the transmitted optical signal is lost. The amplitude is linear with the power of the optical signal. Therefore, if the amplitude is greater than the preset threshold, it indicates that the power is greater than the power threshold, that is, the wavelength of the transmitted light is aligned with the target wavelength channel. If the amplitude is less than the preset threshold, it indicates that the power is less than the power threshold, that is, the wavelength of the transmitted light is not aligned with the target wavelength channel.

The preset threshold may be preset. The preset threshold may be a threshold of amplitude or a ratio of amplitude to electrical spectral noise, ie a specific signal to noise ratio. The preset threshold has a value range of, for example, 5-30 dB.

For example, the HEE photoelectrically converts the first scanned optical signal to form a first electrical signal. And obtaining a spectrum of the signal by Fourier transforming the first electrical signal, and further knowing whether the amplitude at the first pilot frequency corresponding to each TEE exceeds a preset threshold.

In an actual application, it may be determined by other means whether the wavelength of the transmitted light of the first TEE is matched with the target wavelength channel, which is not specifically limited in the present invention.

Alternatively, step 13 can be performed by the WLU as in FIG.

Among them, the number of the first TEE may be one or more.

For the presence of the first TEE, the HEE performs step 14, that is, sends a stop scan to the first TEE. command. The stop scan command may be sent through the aforementioned CIC.

Correspondingly, on the TEE side, step 23 is executed, that is, when the stop scan command of the HEE transmission is received, the wavelength scanning is stopped, and the current wavelength is kept unchanged. It should be noted that when the wavelength scanning is stopped, the wavelength does not change according to the scanning step, that is, remains unchanged at the current wavelength, but the first scanning optical signal can continue to be transmitted at the current wavelength.

At this point, the port of the first TEE is successfully matched, and the current wavelength is the target wavelength.

For other TEEs that do not match successfully, continue with steps 12 and 13 until the match is successful.

It should be noted that, in step 23, the wavelength scanning is stopped, and the current wavelength is kept unchanged. In this process, when the TEE receives the abnormal command sent by the HEE, the TEE stops transmitting the first scanning optical signal and returns to the same. Step 21 and step 22, in other words, the TEE receives the new tuning information sent by the HEE and the new start scan command, and transmits a new scanning optical signal to the HEE according to the new tuning information. The tuning information includes a pilot parameter, a scan parameter, and may further include a target wavelength, a transmission power of the HEE, and a power initialization command.

The abnormal command includes any one or any combination of an abnormal target wavelength, a pilot parameter, and a power initialization command start scan command.

As can be seen from the above description, in the embodiment of the present invention, the HEE allocates a first pilot frequency different from each other for each TEE, and multiple TEEs can simultaneously transmit the first scanning light based on the first pilot frequency of the first TEE. The signal is sent to the HEE, and the HEE can simultaneously determine whether the plurality of TEEs match the target wavelength channel based on the first pilot frequency of each TEE. Therefore, the method in the embodiment of the present invention can support parallel channel matching of multiple TEEs, the matching success rate is high, and the matching speed is fast.

For example, suppose the system has a wavelength of 80, a wavelength channel spacing of 50 GHz, a first scanning step of 12.5 GHz, and a first scanning range covering 80 wavelengths. The maximum transmission distance of the system is 80km, the transmission tuning information is 64bit, the transmission rate of the tuning information is 100kb/s, and the processing delay of the device is 0.1ms.

If matching is performed according to the method in the embodiment of the present invention, the scanning time of each step is T = 80 × 2 × 10 ⁵ ) / (3 × 10 ^{8 /} 1.5) + (64 × 2) / (100 × 10 ³ ) + 0.1 = 2.28ms. The port matching time of a single TEE is 10×80×2.28ms=1.824s. The system matching port matching speed is 1.824s×80=145.92s. It can be seen that the matching speed of the matching method in the embodiment of the present invention is far greater than the matching speed of the prior art matching method described in the background art.

According to the method shown in FIG. 4, on the TEE side, after step 31, step 32 is performed to tune its own transmission wavelength to the target wavelength. Because the TEE has a wavelength lock function, the TEE can directly adjust the wavelength. Optionally, the parameters of the optical transmitter of the optical transmitter are also adjusted according to the first pilot parameter.

Next, when the TEE receives the start scan command, step 33 is performed, that is, the report optical signal is sent to the HEE according to the first pilot frequency; wherein the report optical signal is used to indicate that the TEE is a TEE having a wavelength lock function. Because HEE does not know which TEE has a wavelength lock function, the TEE is required to send a report optical signal for indication. Then, for the HEE, the respective reported optical signals of the n-m TEEs respectively sent by the n-m TEEs are received, and the reported optical signals correspond to respective first pilot frequencies. In this embodiment, m is smaller than n. Then, after receiving the reported optical signal, the HEE can know which TEE has the wavelength locking function according to the first pilot frequency corresponding to the reported optical signal. The HEE then controls the optical transceiver corresponding to the TEE to send a stop scan command to the TEE with the wavelength lock function.

Correspondingly, the TEE receives the stop scan command and stops transmitting the reported optical signal and keeps the current wavelength unchanged. In other words, the TEE has been successfully matched.

Further, because the port matching is performed by the foregoing method, the wavelength of the transmitted light of the first TEE is aligned with the target wavelength channel, but may not be aligned with the center of the target wavelength channel, which easily causes power loss of the transmitted optical signal, so The wavelength of the transmitted light of a TEE is aligned with the center of the target wavelength channel. When the result of the determination in step 13 is that the first TEE exists, and before step 14, the method further includes: determining, by the HEE, that the first TEE is within the first scan range. When scanning is performed, the amplitude of the first electrical signal corresponding to the first scanning optical signal reaches a maximum at the first pilot frequency corresponding to the first TEE. In other words, when the amplitude reaches the maximum value, step 14 is performed to send a stop scan command to the first TEE.

Specifically, the HEE determines that when the first TEE completes a scan within the first scan range, the first a maximum amplitude of the first electrical signal corresponding to the scan optical signal at a first pilot frequency corresponding to the first TEE; and HEE determining that the first TEE performs a second scan within the first scan range, the first scan optical signal corresponds to The amplitude of the first electrical signal at the first pilot frequency corresponding to the first TEE reaches the maximum value.

For example, when the first TEE performs the first scan, the HEE continuously records the amplitude of the first electrical signal corresponding to the first scanned optical signal sent by the first TEE at the first pilot frequency corresponding to the first TEE. Finally, the largest value is selected. Of course, this amplitude maximum must be greater than the preset threshold.

Then, the first TEE starts the second scanning, the scanning parameters are the same, the transmitted scanning optical signal is the first scanning optical signal, and the HEE continuously monitors the first electrical signal corresponding to the first scanning signal in the first corresponding to the first TEE. The amplitude at the pilot frequency, until reaching the maximum again, sends a stop scan command to the first TEE. Corresponding to the TEE side, the TEE performs step 22.

The amplitude reaches a maximum value, indicating that the current wavelength of the first TEE is aligned with the center of the target wavelength channel, so that the port matching is successful.

In practice, it is also possible to find the maximum amplitude when the first scan is not completed, so there is no need to wait until the first scan is completed to start the second scan.

Another possible implementation manner of aligning the wavelength of the transmitted light of the first TEE with the center of the target wavelength channel is as follows: when the result of the determination in step 13 is that the first TEE exists, and before the step 14, the method further includes: The HEE sends a second scan parameter to the first TEE, wherein the second scan parameter includes a second scan step and a second scan range; the second scan step is smaller than the first scan step, and/or the second scan range is smaller than a scanning range; the HEE receives the second scanning optical signal sent by the first TEE with the second scanning parameter; and the HEE determines that the second electrical signal corresponding to the second scanning optical signal is the first when the first TEE scans within the second scanning range. The amplitude at the first pilot frequency corresponding to the TEE reaches a maximum.

Specifically, when the HEE determines that the first TEE scans in the second scan range, the second electrical signal corresponding to the second scan optical signal reaches a maximum value at the first pilot frequency corresponding to the first TEE, including: HEE determination. When the first TEE completes one scan in the second scan range, the second electrical signal corresponding to the second scan optical signal has a maximum amplitude at the first pilot frequency corresponding to the first TEE; When the HEE determines that the first TEE performs the second scan in the second scan range, the amplitude of the second electrical signal corresponding to the second scan optical signal reaches the maximum value at the first pilot frequency corresponding to the first TEE.

In an actual application, when the first TEE is scanned in the second scanning range, the second electrical signal corresponding to the second scanning optical signal reaches a maximum amplitude at the first pilot frequency corresponding to the first TEE. The value, for example, by comparing with the previous amplitude value, when the amplitude value is changed from small to large, and then from large to small, it can be considered that the maximum value is found, so the second scan can be started without the subsequent scan. A scan is performed until the amplitude maximum is reached.

Correspondingly, on the TEE side, while performing step 22, continuously detecting whether the second scan parameter sent by the HEE is received; when the second scan parameter is different from the first scan parameter, the first TEE is based on the first pilot frequency and The second scan parameter begins to transmit a second scan light signal to the HEE.

In this embodiment, the principle and process of aligning the wavelength of the transmitted light of the first TEE with the target wavelength channel are similar to those of the foregoing embodiment, and thus are not described herein again. In the present embodiment, since the rough matching has been completed after step 13, the scanning step can be reduced by a large range without scanning. Therefore, the HEE sends a second scan parameter to the first TEE, and the second scan parameter is smaller than the first scan parameter, so the speed of port matching can be improved.

For example, continue with the foregoing example as an example, assuming that the second scanning step is 5 GHz and the scanning range is 100 GHz, that is, two wavelength channel intervals. In this case, the port matching time of a single TEE is up to 4×80×2.28+20×2.28=0.775s. It can be seen that the method in this embodiment can further improve the port matching speed.

Optionally, the method further includes: determining, by the HEE, the wavelength deviation information or the power adjustment information, and transmitting the wavelength deviation information or the power adjustment information to the first TEE. Correspondingly, the first TEE receives the wavelength deviation information or the power adjustment information sent by the HEE, and adjusts the current wavelength according to the wavelength deviation information, or adjusts the transmission optical power of the TEE according to the power adjustment information. With the method in this embodiment, fine matching can be achieved.

In practical applications, there are many ways for HEE to determine wavelength deviation information or power adjustment information, which will be described in detail below.

Specifically, for the method of step 11 to step 14 shown in FIG. 2, the wavelength deviation information is determined. The method includes the following steps: the HEE obtains a fifth electrical signal after performing photoelectric conversion on the first scanning optical signal of the wavelength calibration device; the HEE obtains the first electrical signal after performing photoelectric conversion on the first scanning optical signal; and the first electrical signal is obtained by the HEE The fifth electrical signal and the first electrical signal when the amplitude of the first pilot frequency corresponding to the TEE exceeds the preset threshold; and the HEE determines the wavelength deviation information according to the fifth electrical signal and the first electrical signal.

Among them, the wavelength calibration tool is an optical device with known filtering characteristics, and the amount of power attenuation at different wavelengths is different.

Set the amount of power attenuation L at the target wavelength. The scanning optical signal passes through the optical splitter and is divided into two parts on average. One part passes through the wavelength calibration tool to generate a specific attenuation amount L1, and the other part does not pass the wavelength calibration tool, so there is no attenuation. The value of L1 can be obtained by subtracting the two signals. When L1 is equal to L, the scanning light signal is at the target wavelength. When L1 and L are not equal, it indicates that the wavelength of the scanning optical signal is deviated. The operation of the wavelength calibrator is well known to those skilled in the art and will not be described in detail.

Since the amplitude and the power are in a linear correspondence relationship, in the present embodiment, the amplitude of the fifth electrical signal obtained after passing through the wavelength calibration tool at the first pilot frequency corresponding to the first TEE and the wavelength calibration tool are not obtained. The amplitude of the first electrical signal at the first pilot frequency corresponding to the first TEE is different, so that the amplitude difference can be obtained. Then, according to the conversion formula of the amplitude and the wavelength, the wavelength deviation value can be known.

Specifically, for the embodiment of the TEE having the wavelength locking function, determining the wavelength deviation information includes the following steps: the HEE obtains the first reported electrical signal after performing photoelectric conversion on the optical signal of the wavelength calibration tool; and the HEE photoelectrically reports the reported optical signal. After the conversion, the second reporting electrical signal is obtained; the HEE determines the wavelength deviation information according to the first reporting electrical signal and the second reporting electrical signal; the HEE sends the wavelength deviation information to the corresponding TEE, respectively, so that the n-m TEEs can be corresponding according to the corresponding The wavelength deviation information adjusts the target wavelength.

The specific determination process in this embodiment is similar to the process in the above embodiment except that the optical signals are different.

Specifically, for the method using the second scan parameter, determining the wavelength deviation information includes step Step: HEE obtains a third electrical signal after performing photoelectric conversion on the second scanning optical signal of the wavelength calibration device; and acquiring, by the HEE, the amplitude of the second electrical signal at the first pilot frequency corresponding to the first TEE reaches the maximum The third electrical signal and the second electrical signal at the time of the value; the HEE determines the wavelength deviation information based on the third electrical signal and the second electrical signal.

The specific determination process in this embodiment is similar to the process in the above embodiment except that the scanning optical signals are different.

Specifically, for the method of performing the two scans using the same scanning parameter, determining the wavelength deviation information includes the following steps: the HEE obtains the fourth electrical signal after performing photoelectric conversion on the first scanning optical signal of the wavelength calibration device; a fourth electrical signal and a first electrical signal when an amplitude of the electrical signal at the first pilot frequency corresponding to the first TEE reaches the maximum value; HEE determines wavelength deviation information based on the fourth electrical signal and the first electrical signal.

The specific determination process in this embodiment is similar to the process in the above embodiment except that the scanning optical signals are different.

Specifically, for the method of using the second scan parameter, the method for determining the power adjustment information includes: acquiring, by the HEE, the optical power of the second scan optical signal corresponding to the second electrical signal when the amplitude reaches the maximum value; The received optical power is greater than the sum of the receiving sensitivity of the normal transmission of the service data and the equivalent power penalty of the transmission link, the minimum transmitted optical power and the maximum uplink loss of the first TEE, and the HEE receiving optical power detection. The difference between the errors; the HEE determines the power adjustment information based on the difference between the optical power and the target received optical power.

Specifically, since the amplitude is linearly related to the transmitted optical power, the optical power can be calculated by calculating the amplitude at which the amplitude reaches the maximum value. The amplitude is equal to the product of the conversion factor, the first pilot modulation depth, and the optical power at which the second scanning optical signal reaches WLU. The conversion factor is a preset value. The above amplitude calculation method is also applicable to each of the foregoing places where the calculation of the amplitude is required, but it is only necessary to replace the second scan signal with the optical scan signal in the corresponding scene.

Of course, in actual operation, the optical power of the second scanning optical signal of the optical receiver of the optical transceiver corresponding to the first TEE may be used, and the power adjustment information may be calculated according to the target received optical power.

Optionally, the power adjustment value is the difference between the optical power and the target received optical power.

Specifically, for the method of performing the two scans by using the same scan parameter, determining the power adjustment information includes the step of: acquiring, by the HEE, the first scan optical signal corresponding to the first electrical signal when the amplitude reaches the maximum value The optical power; the HEE determines the target received optical power; wherein, the target received optical power is greater than the sum of the receiving sensitivity of the normal transmission of the service data and the equivalent power penalty of the transmission link, and the minimum transmitted optical power and the maximum uplink of the first TEE. The difference between the loss and the HEE received optical power detection error; the HEE determines the power adjustment information according to a difference between the optical power and the target received optical power.

The specific determination process in this embodiment is similar to the process in the foregoing embodiment, except that the optical signals are different, and therefore will not be described herein.

Specifically, for the embodiment of the TEE having the wavelength locking function, determining the power adjustment information includes the steps of: acquiring the optical power of the reported optical signal by the HEE; determining the target received optical power by the HEE; wherein the target received optical power is greater than the receiving of the normal transmission of the service data. The sum of the sensitivity and the equivalent power cost of the transmission link, the difference between the minimum transmission optical power and the maximum uplink loss in the n-m TEEs, and the detection error of the HEE received optical power; HEE according to the light The difference between the power and the target received optical power determines power adjustment information; the HEE sends the power adjustment information to the n-m TEEs respectively, so that the n-m TEEs are according to respective corresponding The power adjustment information adjusts the transmitted optical power.

The specific determination process in this embodiment is similar to the process in the foregoing embodiment, except that the optical signals are different, and therefore will not be described herein.

Further, after the step 14, the method further includes: the HEE sending the second pilot parameter and the normal service sending command to the first TEE; wherein the second pilot parameter includes the second pilot depth; the second pilot depth is less than the second A pilot modulation depth is used to reduce the impact of the pilot on normal service optical signals.

Correspondingly, on the TEE side, after the step 23, the method further includes: after receiving the second pilot parameter and the normal service sending command sent by the HEE, the TEE starts to send the normal service optical signal and according to the second pilot. The parameters continue to generate the corresponding pilot signal.

Optionally, before sending the start scan command, the method further includes: HEE to n TEE points Do not transmit the transmit optical power of the HEE or the transmit optical power range of the HEE; so that the n TEEs can determine their initial transmit optical power based on the transmit optical power of the HEE or the transmit optical power range of the HEE. Further optionally, the HEE further sends a power initialization command to the n TEEs, and the TEE starts to determine its initial transmit optical power according to the transmit optical power of the HEE or the transmit optical power range of the HEE when receiving the transmit power initialization command.

For convenience of description, the transmission optical power of the HEE or the transmission optical power range of the HEE may be collectively referred to as initial power adjustment information. In actual use, the initial power adjustment information may also be other information as long as the TEE can determine its own initial transmitted optical power based on the information.

Correspondingly, on the TEE side, before receiving the start scan command sent by the HEE, the method further includes: the TEE receiving the initial power adjustment information of the HEE sent by the HEE; and determining, by the TEE, the initial sending of the TEE according to the initial power adjustment information. Optical power.

When the initial power adjustment information is the transmission optical power of the HEE, the TEE determines the initial transmission optical power of the TEE according to the transmission optical power and its own received optical power.

Specifically, the TEE estimates the link loss according to the received transmit optical power, where the link loss is the difference between the transmit optical power and the received optical power of the TEE. The initial transmitted optical power of the TEE is a value that is not less than the sum of the minimum optical power of the TEE scanning optical signal reaching the HEE, the link loss, and the power margin reserved for the detection error. The minimum optical power of the TEE scanning optical signal reaching the HEE is a preset value.

When the initial power adjustment information is the transmit optical power range of the HEE, the TEE determines that any of the transmit optical powers within the transmit optical power range of the HEE is the initial transmit optical power.

In order to better illustrate the implementation process of the port matching in the embodiment of the present invention, please refer to FIG. 5 again, which is a possible implementation flowchart of the HEE side. Specifically, the method includes:

Step 101: The HEE sends the first pilot parameter, the first scan parameter, and the start scan command to the n TEEs respectively. The first pilot parameter includes a first pilot frequency, and the first pilot frequency corresponding to each TEE is different from each other. The first scan parameter includes a first scan step and a first scan range;

Step 102: The HEE receives a first scan optical signal that is sent by the MTEs of the n TEEs by using the first scan parameter, where the first scan optical signal sent by each of the m TEEs includes the Information of the first pilot frequency of each TEE; m is a positive integer less than or equal to n;

Step 103: The HEE determines whether there is a first TEE transmission light wavelength matching the target wavelength channel according to the first scanning optical signal; when there is a first TEE, step 104 is performed, when there is no first TEE, return to step 101;

Step 104: The HEE sends a second scan parameter to the first TEE, where the second scan parameter includes a second scan step and a second scan range.

Step 105: The HEE receives the second scan optical signal sent by the first TEE with the second scan parameter.

Step 106: The HEE determines a maximum amplitude of the second electrical signal corresponding to the second scanning optical signal at the first pilot frequency corresponding to the first TEE after the first TEE completes one scan in the second scanning range.

Step 107: The HEE receives a second scanning optical signal that is sent when the first TEE starts the second scanning in the second scanning range.

Step 108: The HEE determines whether the amplitude of the second electrical signal corresponding to the second scanning optical signal reaches the maximum value at the first pilot frequency corresponding to the first TEE; when the determination result is yes, step 109 is performed, when determining If the result is no, proceed to step 108;

Step 109: The HEE sends a scan stop command to the first TEE; wherein the amplitude reaches a maximum value to indicate that the current wavelength of the first TEE has been tuned to the vicinity of the target wavelength;

Step 110: HEE calculates wavelength deviation information and power adjustment information;

Step 111: The HEE sends the wavelength deviation information and the power adjustment information to the first TEE;

Step 112: The HEE determines whether the transmission light wavelength and the transmission optical power of the first TEE have been adjusted. When the adjustment is completed, step 113 is performed, and when the adjustment is not completed, the process returns to step 110;

Step 113: The HEE sends a second pilot parameter and a normal service sending command to the first TEE.

Please refer to FIG. 6 again, which is a possible implementation flowchart of the TEE side. Specifically, the method includes:

Step 201: The TEE receives the first pilot parameter and the first scan parameter sent by the HEE, where the first pilot parameter includes a first pilot frequency, and the first scan parameter includes a first scan step and a first scan range.

Step 202: The TEE determines whether a start scan command is received; if yes, step 203 is performed; otherwise, step 202 is continued;

Step 203: The TEE starts to send the first scan optical signal to the HEE according to the first pilot frequency and the first scan parameter; and continuously detects whether the second scan parameter is received; wherein the second scan parameter includes the second scan step and the Second scan range;

Step 204: The TEE determines whether the second scan parameter is the same as the first scan parameter; when the determination result is no, step 205 is performed, and when the determination result is yes, step 203 is continued;

Step 205: Start transmitting a second scanning optical signal to the HEE according to the first pilot frequency and the second scanning parameter;

Step 206: The TEE determines whether the stop scan command is received; when the judgment result is no, the process proceeds to step 206, and when the determination result is yes, step 207 is performed;

Step 207: Stop the wavelength scanning and keep the current wavelength unchanged.

Step 208: Receive wavelength deviation information or power adjustment information sent by the HEE, adjust the current wavelength according to the wavelength deviation information, or adjust the transmit optical power of the TEE according to the power adjustment information.

Step 209: The TEE determines whether the second pilot parameter and the normal service transmission command sent by the HEE are received. When the determination result is no, the process proceeds to step 209. When the determination result is yes, the normal service optical signal is started to be sent. The second pilot parameter continues to generate a corresponding pilot signal.

In the aforementioned HEE workflow, four typical operating states can be defined, namely states S0, S1, S2, and S3. Please refer to FIG. 7 for the transfer relationship between the states. Each working state can be defined as follows:

S0: HEE initialization status. The tuning information required for automatic matching of the port for the TEE is cyclically transmitted, including the target wavelength, the pilot parameter, the HEE transmitting optical power, the power initialization, the scanning parameter, and the start scanning command; the HEE continuously detects whether the upstream optical signal has a corresponding TEE. a pilot signal of a pilot frequency (hereinafter referred to as a target frequency);

S1: The HEE is in a pre-locked state. When the HEE detects the optical signal and finds the pilot signal of the target frequency, it enters the S1 state, in which state the HEE continuously detects and records the maximum amplitude at the target pilot frequency;

S2: HEE is in the wavelength locked state. When the HEE has found the maximum amplitude, it enters the S2 state, and sends a stop scan command to send a new pilot modulation depth, wavelength deviation information, and power adjustment information to the TEE;

S3: HEE is in normal operation. When the HEE detects that the wavelength and power of the optical signal sent by the TEE meet the requirements, it enters the S3 state, sends a normal transmission command of the service data, and the HEE completes the port automatic matching process.

For abnormal situations, the corresponding operation of HEE is as follows:

When the HEE is in the S1, S2 or S3 state, if the received optical signal disappears or the pilot signal at the target frequency disappears within a certain time, the HEE returns from the respective states to the S0 state.

In the foregoing TEE workflow, five typical working states can be defined, namely states S0, S1, S2, and S3. Please refer to FIG. 8 for the transfer relationship between the states. Each working state can be defined as follows:

S0: The TEE has just started, the transmitter is turned off, and the transmission is ready. In this state, the TEE continuously receives the tuning information, including the target wavelength, pilot parameters, HEE transmit optical power, power initialization, scan parameters, and configures the transmitter parameters according to the tuning information. When the TEE receives all the tuning information to complete the transmission preparation and receives the start scanning command, it enters the S1 state.

S1: The TEE is in a wavelength scanning state, in which the TEE performs wavelength scanning according to the scanning parameters. When the TEE receives the stop scan command, it enters the S2 state.

S2: The TEE is in a scanning stop state. In this state, the TEE is in the vicinity of the target wavelength, and the wavelength deviation information and power adjustment information received by the CIC are used to perform fine adjustment of the wavelength and power. After the TEE receives the normal service transmission command, it enters the S3 state.

S3: The TEE is in the normal transmission state, and the TEE still keeps the pilot signal carrying the corresponding target frequency in the uplink signal, and continuously receives the CIC information, and adjusts the relevant transmission parameters.

S4: The TEE is in the uplink information transmission state. When the TEE is in the S2 or S3 state and needs to transmit information to the HEE, the transmission request is first sent to the HEE. After obtaining the HEE confirmation information, the TEE enters the S4 state and reports the information channel through the uplink ( RMC) sends an escalation message to the HEE.

For abnormal situations, the TEE operates as follows:

When the TEE is in the S1, S2, S3, or S4 state, if the shutdown command is received, the received optical signal disappears, or the CIC information cannot be successfully received within a certain period of time, the TEE will return to the S0 state from each state.

The state transition of TEE is mainly triggered by different commands that receive HEE. Therefore, when TEE receives unexpected abnormal CIC information in a certain state, the corresponding operation of TEE is as follows:

When the TEE is in the S0 state, if the abnormal CIC command information such as stop scanning, wavelength deviation information, power adjustment information, or transmission service command is received, the TEE should remain in the S0 state.

Optionally, when the TEE is in the S0 state, in the process of configuring the transmitter parameters, and before receiving the start scan command, if a shutdown command is received, the parameter configuration is stopped and the previous configuration is cleared.

When the TEE is in the S1 state, if the abnormal CIC command information such as the target wavelength, the pilot parameters, the HEE transmission optical power, the power initialization, the scan parameters, and the start scan command are received, the reason is that the TEE transmission wavelength has not been scanned to the target wavelength channel. HEE does not detect the pilot of the target frequency, so the HEE is still in the S0 state and continues to transmit the above tuning information. Therefore, the TEE should remain in the S1 state to continue the wavelength scan.

When the TEE is in the S1 state, if the abnormal CIC command information such as the wavelength deviation, the power adjustment information, or the service command is received, there is a risk that the HEE and the TEE process do not match. The TEE should be reset and returned to the S0 state.

When the TEE is in the S2 or S3 state, if the abnormal CIC command information such as the target wavelength, pilot parameters, HEE transmit optical power, power initialization command, scan parameter, start scan command, etc. is received, the TEE state can be reset and returned to The S0 state, or reporting the situation through the uplink RMC, synchronizes the HEE state with the TEE state.

The above-mentioned uplink RMC is generated in a similar manner to the downlink CIC, and is generated by amplitude-modulating the intensity of the uplink transmission optical signal with a low-frequency, low-modulation depth signal. The low frequency, low modulation depth signal may be an independent sine wave signal, an independent non-return to zero code signal, a superposition of a plurality of sine wave signals, or a superposition of a sine wave signal and a non-return to zero code signal.

The RMC may exist in the port matching process or in the normal service data transmission process.

When the TEE transmits information to the HEE through the RMC, the amplitude of the TEE transmitted optical signal at the target frequency may change. Therefore, before the TEF performs information transmission through the RMC, the TEE needs to first send a transmission request to the HEE, and obtain the transmission of the HEE. After the confirmation is allowed, the TEE starts to upload data through the RMC, thereby eliminating the system risk caused by the HEE malfunction.

Of course, in actual use, TEE can also report information to HEE directly through RMC.

The information reported by the TEE to the HEE includes information about the TEE, status information of the TEE, and information about the operation and maintenance (OAM). The relevant state information of the TEE includes the TEE state machine state, the transmitted optical power, the received optical power, the operating wavelength (frequency) and the deviation, the downlink CIC channel state, the laser temperature, the laser operating parameters, and the basic information of the optical module. The abnormal report information of the TEE includes a case where the downlink CIC information is lost, an abnormal CIC information command is received, the power adjustment value is abnormal, and the power adjustment accuracy is abnormal. The OAM information includes: 1. Network element related information (such as site information, device information, port information, board information, etc.); 2. Service related information (such as service type, service rate, etc.); 3. Warning and early warning (including equipment) Status warning, service related warning, optical power and frequency, laser related, etc.; 4, TEE upgrade information and software, OAM channel requirements, etc.

As can be seen from the above description, an embodiment of the present invention provides a method for automatically matching a port. When a TEE having a wavelength tunable capability is connected to a network, the wavelength of the transmitted light can be automatically tuned to the target wavelength channel by the method of the present invention. The pilot signals transmitted by the TEEs are analyzed and processed by the WLU, and the uplink optical signals from different TEEs are distinguished by different pilot frequencies. The wavelength scanning stop position of the TEE is determined by the maximum amplitude at the target pilot, so that multiple TEEs can be simultaneously connected to the network to implement automatic matching of the network port.

Further, based on the detection of the pilot signal, the HEE can improve the automatic matching speed of the port by controlling the scanning step and the scanning range parameter, and ensure that the TEE scanning stop wavelength is within the normal operating range of the WLU, and the port is successfully matched to achieve wavelength matching.

Based on the same inventive concept, an embodiment of the present invention further provides a port matching apparatus for implementing the method shown in FIG. As shown in FIG. 9, the port matching apparatus includes: a sending unit 301, configured to separately send a first pilot parameter, a first scan parameter, and a start scan command to the n TEEs; The pilot parameters include a first pilot frequency, and the first pilot frequencies corresponding to each TEE are different from each other; the first scan parameter includes a first scan step and a first scan range; n is a positive integer; and the receiving unit 302 a first scanning optical signal that is sent by the first one of the n TEEs, wherein the first scanning optical signal sent by each of the m TEEs includes the The information of the first pilot frequency of each TEE; m is a positive integer less than or equal to n; the processing unit 303 is configured to determine, according to the first scanning optical signal, whether there is a transmission light wavelength and a target wavelength channel of the first TEE The matching unit 301 is further configured to send a stop scan command to the first TEE when the first TEE is present.

Optionally, the processing unit 303 is further configured to: process the first scan signal to obtain a first electrical signal; and amplitude of the first electrical signal at a first pilot frequency corresponding to each TEE Whether the value exceeds a preset threshold; wherein, when the amplitude value exceeds the preset threshold, indicating that the wavelength of the transmitted light of the first TEE is matched with the target wavelength channel, and the amplitude value exceeds the first guide at the preset value The TEE corresponding to the frequency frequency is the first TEE.

Optionally, the sending unit 301 is further configured to: send a second scan parameter to the first TEE, where the second scan parameter includes a second scan step and a second scan range; Less than the first scanning step, and/or the second scanning range is smaller than the first scanning range;

The receiving unit 302 is further configured to: receive a second scan optical signal that is sent by the first TEE by using the second scan parameter;

The processing unit 303 is further configured to: when determining that the first TEE scans in the second scan range, the second electrical signal corresponding to the second scan optical signal is at the first pilot frequency corresponding to the first TEE The amplitude is at its maximum.

Optionally, the processing unit is further configured to: when the first TEE completes one scan in the second scan range, the second electrical signal corresponding to the second scan optical signal is in the first TEE Corresponding first amplitude of the first pilot frequency; determining that the first TEE performs a second scan in the second scan range, the second electrical signal corresponding to the second scan optical signal is The amplitude at the first pilot frequency corresponding to the first TEE reaches the maximum value.

Optionally, the processing unit 303 is further configured to: use the second scan optical signal that passes through the wavelength calibration tool Obtaining a third electrical signal after performing photoelectric conversion; acquiring the third electrical signal when the amplitude of the second electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE and the a second electrical signal; determining wavelength deviation information according to the third electrical signal and the second electrical signal;

The sending unit 301 is further configured to: send the wavelength deviation information to the first TEE, so that the first TEE can adjust the current wavelength according to the wavelength deviation information.

Optionally, the processing unit 303 is further configured to: acquire optical power of the second scanning optical signal corresponding to the second electrical signal when the amplitude reaches the maximum value; determine a target received optical power; wherein the target The received optical power is greater than the sum of the receiving sensitivity of the normal transmission of the service data and the equivalent power penalty of the transmission link, and the difference between the minimum transmitted optical power of the first TEE and the maximum uplink loss, and the detection error of the HEE received optical power Determining power adjustment information according to a difference between the optical power and the target received optical power;

The sending unit 301 is further configured to: send the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information.

Optionally, the sending unit 301 is further configured to separately send the first pilot parameter, the first scan parameter, and the start scan command to the n TEEs by using the control information channel CIC.

Optionally, the processing unit 303 is further configured to: generate, by using a low frequency, low modulation depth signal, amplitude modulation of the strength of the service data optical signal to generate the CIC.

Optionally, the sending unit 301 is further configured to: separately send the transmit optical power of the HEE or the transmit optical power range of the HEE to the n TEEs, so that the n TEEs can be sent based on the HEE The optical power or the transmitted optical power range of the HEE determines its own initial transmitted optical power.

Optionally, the processing unit 303 is further configured to: when the first TEE scans in the first scan range, the first electrical signal corresponding to the first scan optical signal corresponds to the first TEE The amplitude at the first pilot frequency reaches a maximum.

Optionally, the processing unit 303 is configured to: after the first TEE completes one scan in the first scan range, the first electrical signal corresponding to the first scan optical signal corresponds to the first TEE a maximum amplitude at a first pilot frequency; determining the first TEE in the first scan When the second scan is performed, the amplitude of the first electrical signal corresponding to the first scanning optical signal at the first pilot frequency corresponding to the first TEE reaches the maximum value.

Optionally, the processing unit 303 is further configured to: after the photoelectric conversion of the first scan optical signal that passes through the wavelength calibration tool, obtain a fourth electrical signal; and acquire the first electrical signal corresponding to the first TEE. The fourth electrical signal and the first electrical signal when an amplitude at a pilot frequency reaches the maximum value; determining wavelength deviation information according to the fourth electrical signal and the first electrical signal;

The sending unit 301 is further configured to: send the wavelength deviation information to the first TEE, so that the first TEE can adjust the current wavelength according to the wavelength deviation information.

Optionally, the processing unit 303 is further configured to: acquire optical power of the first scan optical signal corresponding to the first electrical signal when the amplitude reaches the maximum value; determine target received optical power; wherein the target The received optical power is greater than the sum of the receiving sensitivity of the normal transmission of the service data and the equivalent power penalty of the transmission link, and the difference between the minimum transmitted optical power of the first TEE and the maximum uplink loss, and the detection error of the HEE received optical power Determining power adjustment information according to a difference between the optical power and the target received optical power;

The sending unit 301 is further configured to: send the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information.

Optionally, when m is less than n, the sending unit 301 is further configured to: respectively send a target wavelength to the n TEEs; wherein the target wavelength is a wavelength to which each TEE is to be tuned, the each TEE The corresponding target wavelengths are different from each other;

The receiving unit 302 is further configured to: receive respective reported optical signals of the n-m TEEs respectively sent by the n-m TEEs, where the reported optical signals correspond to respective first pilot frequencies, and the reported optical signals are used for Instructing the n-m TEEs to have a wavelength locking function;

The sending unit 301 is further configured to: send a scan stop command to the n-m TEEs according to the reported optical signal.

Optionally, the processing unit 303 is further configured to: after performing photoelectric conversion on the reported optical signal that passes through the wavelength calibration tool, to obtain a first reported electrical signal; and performing photoelectric conversion on the reported optical signal to obtain a second reported electrical signal; Determining the first reported electrical signal and the second reported electrical signal Long deviation information;

The sending unit 301 is further configured to: send the wavelength deviation information to the corresponding TEE, respectively, so that the n-m TEEs can adjust the target wavelength according to the corresponding wavelength deviation information.

Optionally, the processing unit 303 is further configured to: acquire optical power of the reported optical signal, and determine a target received optical power, where the target received optical power is greater than a receiving sensitivity of the normal transmission of the service data and an equivalent power of the transmission link. a sum of the costs, which is smaller than a difference between a minimum transmit optical power and a maximum uplink loss in the n-m TEEs, and a detection error of the HEE received optical power; according to the optical power and the target received optical power The difference determines power adjustment information;

The sending unit 301 is further configured to: send the power adjustment information to the n-m TEEs respectively, so that the n-m TEEs adjust the transmit optical power according to the corresponding power adjustment information.

Optionally, the first pilot parameter further includes a first pilot modulation depth, and the sending unit 301 is further configured to: send the second pilot parameter and the normal service sending command to the n-m TEEs, where The second pilot parameter includes a second pilot depth; the second pilot depth is less than the first pilot modulation depth.

Optionally, the first pilot parameter further includes a first pilot modulation depth, and the sending unit 301 is further configured to: send a second pilot parameter and a normal service sending command to the first TEE; The second pilot parameter includes a second pilot depth; the second pilot depth is less than the first pilot modulation depth.

Optionally, the receiving unit 302 is further configured to: receive a transmission request sent by a second TEE of the n TEEs; the transmission request is used to request to report information from the report information channel RMC;

The sending unit 301 is further configured to: send the acknowledgement information to the second TEE, to indicate that the second TEE reports the information by using the RMC.

The various changes and specific examples in the port matching method in the foregoing embodiment shown in FIG. 2 are also applicable to the port matching device in this embodiment. The foregoing detailed description of the port matching method can be clearly understood by those skilled in the art. Knowing the implementation method of the port matching device in this embodiment, for the sake of brevity of the description, it will not be described in detail herein.

Based on the same inventive concept, an embodiment of the present invention further provides a port matching apparatus, which is used to implement The method shown in Figures 3 and 4. As shown in FIG. 10, the port matching apparatus includes: a receiving unit 401, configured to receive a first pilot parameter and a first scan parameter sent by the head end device HEE; wherein the first pilot parameter includes a first pilot frequency; The first scan parameter includes a first scan step and a first scan range; the sending unit 402 is configured to: when receiving the start scan command of the HEE transmission, and the TEE is a TEE without a wavelength lock function Transmitting, according to the first pilot frequency and the first scanning parameter, a first scanning optical signal to the HEE; and processing unit 403, for stopping the wavelength scanning when receiving the stop scanning command sent by the HEE , keep the current wavelength unchanged.

Optionally, the receiving unit 401 is further configured to: when the sending unit 402 starts sending the scan optical signal to the HEE according to the first pilot frequency and the first scan parameter, continuously detecting whether the HEE is received a second scan parameter sent; wherein the second scan parameter includes a second scan step and a second scan range;

The sending unit 402 is further configured to: when the second scan parameter is different from the first scan parameter, start sending the second scan optical signal to the HEE according to the first pilot frequency and the second scan parameter. .

Optionally, when the TEE is a TEE with a wavelength locking function, the receiving unit 401 is further configured to receive a target wavelength that is sent by the HEE;

The processing unit 403 is further configured to: tune a transmission wavelength of the optical transmitter to the target wavelength;

The sending unit 402 is further configured to: when receiving the start scan command of the HEE transmission, send a report optical signal to the HEE according to the first pilot frequency; wherein the report optical signal is used to indicate the TEE For a TEE with a wavelength locking function;

The processing unit 403 is further configured to: stop receiving the reported optical signal when receiving the stop scan command sent by the HEE, and keep the current wavelength unchanged.

Optionally, the processing unit 403 is further configured to: after receiving the wavelength deviation information or the power adjustment information sent by the HEE, adjust the current wavelength according to the wavelength deviation information, or adjust the according to the power adjustment information. The transmitted optical power of the TEE.

Optionally, the receiving unit 401 is further configured to: receive initial power adjustment information sent by the HEE;

The processing unit 403 is further configured to: determine, according to the initial power adjustment information, the sending unit 402 Initially transmit optical power.

Optionally, the initial power adjustment information is the transmit optical power of the HEE, and the processing unit 403 is configured to: determine a link loss according to the transmit optical power and the received optical power of the TEE; and determine the initial transmit light. The power is a value that is not less than the sum of the minimum optical power of the HEE, the link loss, and the power headroom of the scanning optical signal of the TEE.

Optionally, the initial power adjustment information is a range of the transmit optical power of the HEE, and the processing unit 403 is configured to: determine that any transmit optical power in the transmit optical power range of the HEE is the initial transmit optical power.

Optionally, the sending unit 402 is further configured to: send a transmission request to the HEE; the transmission request is used to request reporting information from the reporting information channel RMC; and after the receiving unit 401 receives the confirmation information sent by the HEE, The reporting information is sent to the HEE through the RMC.

Optionally, the sending unit 402 is further configured to: send the report information to the HEE by using the report information channel RMC.

Optionally, the processing unit 403 is further configured to: perform amplitude modulation on the strength of the service data optical signal by using a low frequency, low modulation depth signal to generate the RMC.

Optionally, the first pilot parameter further includes a first pilot modulation depth, and the sending unit 402 is further configured to: when the receiving unit 401 receives the second pilot parameter and the normal service sending command sent by the HEE, Generating a normal service optical signal and continuously generating a corresponding pilot signal according to the second pilot parameter; wherein the second pilot parameter includes a second pilot modulation depth, and the second pilot modulation depth is less than The first pilot modulation depth.

Optionally, before the receiving unit 401 receives the start scan command sent by the HEE, the processing unit 403 is further configured to perform parameter configuration on the TEE according to the first pilot parameter and the first scan parameter; Upon receiving the shutdown command sent by the HEE, the processing unit 403 stops the parameter configuration process and clears the previous configuration.

Optionally, in the process of stopping the wavelength scanning, when the receiving unit 401 receives the abnormal command sent by the HEE, the sending unit 402 stops transmitting the first scanning optical signal, and the receiving unit 401 receives the new tuning information sent by the HEE and the new Scan start command, the sending unit 402 follows the new tone The harmonic information transmits a new scan optical signal to the HEE; wherein the tuning information includes a pilot parameter and a scan parameter; the abnormal command includes any one or any combination of a target wavelength, a pilot parameter, a power initialization command, and a start scan command.

The various changes and specific examples in the port matching method in the foregoing embodiments shown in FIG. 3 and FIG. 4 are also applicable to the port matching device of this embodiment. Through the foregoing detailed description of the port matching method, those skilled in the art The implementation method of the port matching device in this embodiment can be clearly understood, so for the sake of brevity of the description, it will not be described in detail herein.

Based on the same inventive concept, an embodiment of the present invention further provides an HEE for implementing the method shown in FIG. 2. As shown in FIG. 1 and FIG. 11, the HEE includes: an optical transmitter, configured to separately send a first pilot parameter, a first scan parameter, and a start scan command to the n tail end devices TEE; the first pilot parameter Include a first pilot frequency, the first pilot frequencies corresponding to each TEE are different from each other; the first scan parameter includes a first scan step and a first scan range; n is a positive integer; a wavelength locking unit (WLU) a first scanning optical signal that is sent by the first one of the n TEEs, wherein the first scanning optical signal sent by each of the m TEEs includes the Information of the first pilot frequency of each TEE; m is a positive integer less than or equal to n; and determining, according to the first scanning optical signal, whether the wavelength of the transmitted light of the first TEE matches the target wavelength channel; And configured to, when the first TEE is present, control the optical transmitter to send a stop scan command to the first TEE.

Optionally, the number of optical transmitters may be one, and supports signaling of multiple wavelengths at the same time.

Optionally, the number of optical transmitters may be n, respectively supporting signal transmission of one wavelength, and corresponding to n TEEs.

Optionally, the optical transmitter and the optical receiver may be physically independent of each other or may be integrated to form an optical transceiver.

The controller is connected to the wavelength locking unit and the optical transmitter.

Optionally, the HEE further includes an MD, and the controller is connected to the optical transmitter through the MD.

Optionally, the HEE further includes an OM/OD, and its use has been described in the foregoing description of FIG. 1, and therefore will not be described herein.

Optionally, the HEE further includes a power splitter for splitting the uplink wavelength division multiplexed signal into two paths, entering the optical transceiver or entering the OM/OD first, and then entering the optical transceiver. The other way directly into the wavelength division locking unit.

Optionally, as shown in FIG. 11, the wavelength locking unit includes a first photoelectric conversion device and a processing circuit. The first photoelectric conversion device is, for example, a photodiode. The first scanning optical signal may be directly outputted from the power splitter shown in FIG. 1 to the first photoelectric conversion device, or as shown in FIG. 11, the first scanning optical signal is output to the first photoelectric via the optical splitter. Conversion device. Therefore, the wavelength locking unit may further include an optical splitter.

The first photoelectric conversion device is configured to process the first scan signal to obtain a first electrical signal;

The processing circuit is configured to determine whether the amplitude value of the first electrical signal at the first pilot frequency corresponding to each TEE exceeds a preset threshold; wherein, when the amplitude value exceeds the preset threshold, the indication The transmitting light wavelength of the first TEE is matched with the target wavelength channel, and the TEE corresponding to the first pilot frequency whose amplitude value exceeds the preset value is the first TEE.

Optionally, the control unit is further configured to: when the first TEE is present, control the optical transmitter to send the second scan parameter to the first TEE before the control optical transmitter sends the stop scan command to the first TEE, where The second scan parameter includes a second scan step and a second scan range; the second scan step is smaller than the first scan step, and/or the second scan range is smaller than the first scan range;

The first photoelectric conversion device is further configured to receive the second scan optical signal sent by the first TEE by the second scan parameter;

The processing circuit is further configured to: when the first TEE scans in the second scan range, the second electrical signal corresponding to the second scan optical signal is at the first pilot frequency corresponding to the first TEE The amplitude reaches the maximum.

Optionally, the processing circuit is configured to: determine, by the first photoelectric conversion device, photoelectrically converting the second scanning optical signal by the first photoelectric conversion device when the first TEE completes one scan in the second scanning range a maximum amplitude of the second electrical signal at the first pilot frequency corresponding to the first TEE; and determining that the first TEE performs a second scan within the second scan range, via the first photoelectric a second electrical signal obtained by photoelectric conversion of the second scanning optical signal by the conversion device The amplitude at the first pilot frequency corresponding to a TEE reaches the maximum value.

Optionally, as shown in FIG. 11, the wavelength locking unit further includes a wavelength calibration device and a second photoelectric conversion device, wherein an output end of the first photoelectric conversion device and an output end of the second photoelectric conversion device are both connected to an input end of the processing circuit. . The output of the processing circuit is connected to the control unit. The wavelength calibration tool is, for example, an etalon wavelength calibrator. The second photoelectric conversion device is, for example, a photodiode.

The second photoelectric conversion device is configured to perform photoelectric conversion on the second scanning optical signal passing through the wavelength calibration tool to obtain a third electrical signal;

The processing circuit is further configured to: acquire the third electrical signal and the second electrical signal when the amplitude of the second electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE; Determining wavelength deviation information according to the third electrical signal and the second electrical signal;

The controller is further configured to: control the optical transmitter to send the wavelength deviation information to the first TEE, so that the first TEE can adjust the current wavelength according to the wavelength deviation information.

Optionally, the processing circuit is further configured to: acquire optical power of the second scanning optical signal corresponding to the second electrical signal when the amplitude reaches the maximum value; determine target received optical power; wherein the target receiving The optical power is greater than a sum of a receiving sensitivity of a normal transmission of the service data and an equivalent power cost of the transmission link, and a difference between a minimum transmission optical power of the first TEE and a maximum uplink loss, and a detection error of the HEE received optical power; Determining power adjustment information according to a difference between the optical power and the target received optical power;

The controller is further configured to: control the optical transmitter to send the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information.

Optionally, the optical transmitter of the controller separately sends a first pilot parameter, a first scan parameter, and a start scan command to the n TEEs through a control information channel CIC.

Optionally, the HEE further includes a modulation driver (MD) for amplitude-modulating the intensity of the service data optical signal to generate the CIC using a low frequency, low modulation depth signal.

Optionally, the controller is further configured to: control the optical transmitter to separately send the transmit optical power of the HEE or the transmit optical power range of the HEE to the n TEEs; to enable the n TEEs Being able to determine its own initial based on the transmitted optical power of the HEE or the transmitted optical power range of the HEE The optical power is transmitted.

Optionally, as shown in FIG. 11, the wavelength locking unit further includes a first photoelectric conversion device and a processing circuit.

The processing circuit is configured to determine a first electrical signal obtained by photoelectrically converting the first scanning optical signal by the first photoelectric conversion device when the first TEE scans within the first scanning range The amplitude at the first pilot frequency corresponding to the first TEE reaches a maximum value.

Optionally, the processing circuit is configured to: after the first TEE completes one scan in the first scan range, perform photoelectric conversion on the first scan optical signal by using the first photoelectric conversion device. a maximum amplitude of the obtained first electrical signal at a first pilot frequency corresponding to the first TEE; and determining that the first TEE performs a second scan within the first scanning range, A first electrical signal obtained by photoelectrically converting the first scanning optical signal by a photoelectric conversion device reaches an amplitude at a first pilot frequency corresponding to the first TEE.

Optionally, as shown in FIG. 11, the wavelength locking unit further includes a wavelength calibration tool and a second photoelectric conversion device.

The second photoelectric conversion device is configured to perform photoelectric conversion after the first scanning optical signal passing through the wavelength calibration device to obtain a fourth electrical signal;

The processing unit is further configured to: acquire the fourth electrical signal and the first electrical signal when the amplitude of the first electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE a signal; determining wavelength deviation information according to the fourth electrical signal and the first electrical signal;

The controller is further configured to: control the optical transmitter to send the wavelength deviation information to the first TEE, so that the first TEE can adjust the current wavelength according to the wavelength deviation information.

Optionally, the processing circuit is further configured to: obtain an optical power of the first scan optical signal corresponding to the first electrical signal when the amplitude reaches the maximum value; and determine a target received optical power; The target received optical power is greater than the sum of the receiving sensitivity of the normal transmission of the service data and the equivalent power penalty of the transmission link, the minimum transmitted optical power and the maximum uplink loss of the first TEE, and the detection error of the HEE received optical power. Poor; determining power adjustment information according to a difference between the optical power and the target received optical power;

The controller is further configured to: control the optical transmitter to send the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information.

Optionally, when m is less than n, the controller is further configured to: control the optical transmitter to separately send a target wavelength to the n TEEs; wherein the target wavelength is finally tuned to each TEE Wavelength, the target wavelengths corresponding to each of the TEEs are different from each other;

The wavelength locking unit is configured to receive respective reported optical signals of the n-m TEEs respectively sent by the n-m TEEs, where the reported optical signals correspond to respective first pilot frequencies, and the reported optical signals are used for Instructing the n-m TEEs to have a wavelength locking function;

The controller is further configured to control the optical transmitter to send a scan stop command to the n-m TEEs according to the reported optical signal.

Optionally, as shown in FIG. 11, the wavelength locking unit includes a wavelength calibration tool, a first photoelectric conversion device, a second photoelectric conversion device, and a processing circuit.

The second photoelectric conversion device is configured to perform photoelectric conversion on the reported optical signal passing through the wavelength calibration tool to obtain a first reported electrical signal;

The first photoelectric conversion device is configured to perform photoelectric conversion on the reported optical signal to obtain a second reported electrical signal;

The processing circuit is configured to determine wavelength deviation information according to the first reporting electrical signal and the second reporting electrical signal;

The controller is further configured to: control the optical transmitter to separately send the wavelength deviation information to a corresponding TEE, so that the n-m TEEs can adjust the target wavelength according to the corresponding wavelength deviation information. .

Optionally, the wavelength locking unit is further configured to: acquire optical power of the reported optical signal; and determine target received optical power; wherein the target received optical power is greater than a receiving sensitivity of a normal transmission of service data, a transmission link, and the like. The sum of the effective power costs, less than the difference between the corresponding minimum transmitted optical power and the maximum uplink loss in the n-m TEEs, and the HEE received optical power detection error; and the received light according to the optical power and the target The difference in power determines power adjustment information;

The controller is further configured to: control the optical transmitter to separately send the power adjustment information to The n-m TEEs are configured to adjust the transmit optical power according to the corresponding power adjustment information by the n-m TEEs.

Optionally, the first pilot parameter further includes a first pilot modulation depth, and the controller is further configured to: control the optical transceiver to separately send the second pilot parameter to the n-m TEEs a normal service transmission command; wherein the second pilot parameter includes a second pilot depth; the second pilot depth is less than the first pilot modulation depth.

Optionally, the first pilot parameter further includes a first pilot modulation depth, and the controller is further configured to: control the optical transceiver to send a second pilot parameter and send a normal service to the first TEE. a command; wherein the second pilot parameter comprises a second pilot depth; the second pilot depth is less than the first pilot modulation depth.

Optionally, the HEE further includes an optical receiver, configured to receive a transmission request sent by a second TEE of the n TEEs, where the transmission request is used to request reporting information from the reporting information channel RMC;

The controller is further configured to: control the optical transmitter to send an acknowledgement message to the second TEE, to indicate that the second TEE reports information by using the RMC.

The various changes and specific examples in the port matching method in the foregoing embodiment shown in FIG. 2 are also applicable to the HEE of the embodiment. The foregoing detailed description of the port matching method can be clearly known to those skilled in the art. The implementation method of the HEE in the embodiment, so for the sake of brevity of the description, it will not be described in detail herein.

Based on the same inventive concept, an embodiment of the present invention further provides a TEE for implementing the methods shown in FIG. 3 and FIG. As shown in FIG. 12, the TEE includes a controller 501, a light receiver 502, an optical transmitter 503, and a memory 504. The controller 501 may be a central processing unit, an application specific integrated circuit (ASIC), and may be one or more integrated circuits for controlling program execution, and may be a field programmable gate array. (English: Field Programmable Gate Array, referred to as: FPGA) developed hardware circuit. The number of memories 504 can be one or more. The memory 504 may include a read only memory (English: Read Only Memory, ROM for short), and a random access memory (English: Random Access Memory, Abbreviation: RAM) and disk storage. The optical receiver 502 and the optical transmitter 503 can be physically independent of each other or integrated.

Specifically, the optical receiver 502 is configured to receive a first pilot parameter and a first scan parameter that are sent by the head end device HEE, where the first pilot parameter includes a first pilot frequency, and the first scan parameter includes a first a scan step and a first scan range; an optical transmitter 503, configured to: when receiving the start scan command of the HEE transmission, and the TEE is a TEE without a wavelength lock function, according to the first guide The frequency frequency and the first scanning parameter start to send the first scanning optical signal to the HEE; the controller 501 is configured to control the optical transceiver to stop the wavelength scanning when receiving the stop scanning command sent by the HEE, Keep the current wavelength unchanged.

Optionally, the controller 501 is further configured to: when the optical transmitter 503 sends the scan optical signal to the HEE, continuously detect, by the optical receiver 502, whether the second scan parameter sent by the HEE is received; The second scan parameter includes a second scan step and a second scan range; and when the second scan parameter is different from the first scan parameter, controlled according to the first pilot frequency and the second scan parameter The optical transmitter 503 transmits a second scanning optical signal to the HEE.

Optionally, when the TEE is a TEE with a wavelength locking function, the optical receiver 502 is further configured to: receive a target wavelength that is sent by the HEE;

The controller 501 is configured to control the optical transmitter 503 to tune the transmission wavelength of the optical transmitter 503 to the target wavelength;

The controller 501 is further configured to: when receiving the start scan command of the HEE transmission, send, by using the optical transmitter 503, the report optical signal to the HEE according to the first pilot frequency; wherein, the reporting the optical signal is The TEE is instructed to be a TEE having a wavelength locking function; when receiving the stop scanning command sent by the HEE, the control optical transmitter 503 stops transmitting the reported optical signal and keeps the current wavelength unchanged.

Optionally, the controller 501 is further configured to: after receiving the wavelength deviation information or the power adjustment information sent by the HEE, adjust the current wavelength according to the wavelength deviation information, or adjust the optical transmission according to the power adjustment information. The optical power of the transmitter 503.

Optionally, the optical receiver 502 is further configured to: after receiving the start scan command of the HEE transmission Previously, receiving initial power adjustment information sent by the HEE;

The controller 501 is further configured to: determine an initial transmit optical power of the optical transmitter 503 according to the initial power adjustment information.

Optionally, the initial power adjustment information is the transmit optical power of the HEE, and the controller 501 is configured to determine a link loss according to the transmit optical power and the received optical power of the TEE; and determine the initial transmit light. The power is a value that is not less than the sum of the minimum optical power of the HEE, the link loss, and the power headroom of the scanning optical signal of the TEE.

Optionally, the initial power adjustment information is a range of the transmit optical power of the HEE, and the controller 501 is configured to: determine, by the TEE, any transmit optical power in the transmit optical power range of the HEE to be the initial transmit Optical power.

Optionally, the controller 501 is further configured to: send, by using the optical transmitter 503, a transmission request to the HEE; the transmission request is used to request reporting information from the reporting information channel RMC; and receiving the confirmation information sent by the HEE Thereafter, the reported information is sent to the HEE through the RMC.

Optionally, the controller 501 is further configured to: send the report information to the HEE by using the report information channel RMC.

Optionally, the TEE further includes a modulation driver for amplitude-modulating the intensity of the service data optical signal to generate the RMC using a low frequency, low modulation depth signal.

Optionally, the first pilot parameter further includes a first pilot modulation depth, and the controller 501 is further configured to: after receiving the second pilot parameter sent by the HEE and a normal service sending command, control the optical sending The 503 starts to send a normal service optical signal and continuously generates a corresponding pilot signal according to the second pilot parameter; wherein the second pilot parameter includes a second pilot modulation depth, and the second pilot modulation depth is less than The first pilot modulation depth.

Optionally, the controller 501 is further configured to perform parameter configuration on the optical transmitter 503 according to the first pilot parameter and the first scanning parameter; and when the optical receiver 502 receives the shutdown command sent by the HEE , stop the parameter configuration process and clear the previous configuration.

Optionally, the optical receiver 502 is further configured to: when receiving the abnormal command sent by the HEE, in the process of stopping the wavelength scanning, the controller 501 controls the optical transmitter 503 to stop sending the First scanning the optical signal, and controlling the optical receiver 502 to receive the new tuning information sent by the HEE and a new start scanning command; the optical transmitter 503 is further configured to: send a new scanning optical signal according to the new tuning information. Giving the HEE; the tuning information includes pilot parameters and scan parameters.

The various changes and specific examples in the port matching method in the foregoing embodiments shown in FIG. 3 and FIG. 4 are also applicable to the TEE of the present embodiment. The foregoing detailed description of the port matching method can be clearly understood by those skilled in the art. The implementation method of the TEE in this embodiment is known, so for the sake of brevity of the description, it will not be described in detail herein.

One or more technical solutions provided in the application embodiments have at least the following technical effects or advantages:

In the embodiment of the present invention, the HEE allocates a first pilot frequency different from each other for each TEE, and multiple TEEs can simultaneously transmit the first scanning optical signal to the HEE based on the first pilot frequency of the TEE, and the HEE can A plurality of TEEs are simultaneously judged based on the first pilot frequency of each TEE to match the target wavelength channel. Therefore, the method in the embodiment of the present invention can support parallel channel matching of multiple TEEs, the matching success rate is high, and the matching speed is fast.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims (64)

A port matching method, comprising: The head end device HEE sends the first pilot parameter, the first scan parameter, and the start scan command to the n end device TEEs respectively; the first pilot parameter includes a first pilot frequency, and the first guide corresponding to each TEE The frequency frequencies are different from each other; the first scan parameter includes a first scan step and a first scan range; n is a positive integer; The HEE receives a first scan optical signal that is sent by each of the n TEEs by using the first scan parameter, where the first scan optical signal sent by each of the m TEEs includes the Information of the first pilot frequency of each TEE; m is a positive integer less than or equal to n; Determining, according to the first scanning optical signal, whether the wavelength of the transmitting light of the first TEE matches the target wavelength channel; When the first TEE is present, a stop scan command is sent to the first TEE. The method of claim 1, wherein the HEE determines whether the wavelength of the transmitted light of the first TEE matches the target wavelength channel according to the first scanning optical signal, including: The HEE processes the first scan signal to obtain a first electrical signal; Determining, by the HEE, whether an amplitude value of the first electrical signal at a first pilot frequency corresponding to each TEE exceeds a preset threshold; wherein, when the amplitude value exceeds the preset threshold, indicating that the The transmit light wavelength of the first TEE matches the target wavelength channel, and the TEE corresponding to the first pilot frequency whose amplitude value exceeds the preset value is the first TEE. The method according to claim 1 or 2, wherein, when the first TEE is present, before the sending of the stop scan command to the first TEE, the method further comprises: The HEE sends a second scan parameter to the first TEE, wherein the second scan parameter includes a second scan step and a second scan range; the second scan step is smaller than the first scan step And/or the second scan range is smaller than the first scan range; The HEE receives a second scan optical signal sent by the first TEE with the second scan parameter; When the HEE determines that the first TEE scans within the second scan range, the second electrical signal corresponding to the second scan optical signal reaches an amplitude at a first pilot frequency corresponding to the first TEE. Maximum value. The method according to claim 3, wherein said HEE determines that said first TEE scans said second scan range, said second scan optical signal corresponds to said second electrical signal at said The amplitude of the first pilot frequency corresponding to a TEE reaches a maximum value, including: When the HEE determines that the first TEE completes one scan in the second scan range, the second electrical signal corresponding to the second scan optical signal is at the first pilot frequency corresponding to the first TEE. Maximum amplitude; Determining, by the HEE, that the second electrical signal corresponding to the second scanning optical signal is at a first pilot frequency corresponding to the first TEE when the first TEE performs a second scanning in the second scanning range. The amplitude at which the maximum is reached. The method of claim 3 or 4, wherein the method further comprises: The HEE obtains a third electrical signal after performing photoelectric conversion on the second scanning optical signal of the wavelength calibration device; The HEE acquires the third electrical signal and the second electrical signal when the amplitude of the second electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE; The HEE determines wavelength deviation information according to the third electrical signal and the second electrical signal; The HEE transmits the wavelength deviation information to the first TEE to enable the first TEE to adjust the current wavelength according to the wavelength deviation information. The method of any of claims 3-5, wherein the method further comprises: And obtaining, by the HEE, an optical power of the second scanning optical signal corresponding to the second electrical signal when the amplitude reaches the maximum value; Determining, by the HEE, a target received optical power, wherein the target received optical power is greater than a sum of a receiving sensitivity of a normal transmission of the service data and an equivalent power cost of the transmission link, and a minimum transmission optical power and a maximum uplink of the first TEE. Link loss, difference between the HEE received optical power detection error; The HEE determines a power adjustment signal according to a difference between the optical power and the target received optical power interest; The HEE sends the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information. The method according to any one of claims 1-6, wherein the head end device HEE sends the first pilot parameter, the first scan parameter, and the start scan command to the n tail end devices TEE, respectively, including: The HEE sends a first pilot parameter, a first scan parameter, and a start scan command to the n TEEs through the control information channel CIC. The method according to claim 7, wherein before the HEE transmits the first pilot parameter, the first scan parameter, and the start of the scan command to the n TEEs through the control information channel CIC, the method further include: The HEE uses a low frequency, low modulation depth signal to amplitude modulate the intensity of the traffic data optical signal to generate the CIC. The method of any of claims 1-8, wherein the method further comprises: Transmitting, by the HEE, the transmit optical power of the HEE or the transmit optical power range of the HEE to the n TEEs, respectively, to enable the n TEEs to be based on the transmit optical power of the HEE or the transmission of the HEE The optical power range determines its own initial transmitted optical power. The method according to claim 1, wherein, when the first TEE is present, before the sending of the stop scan command to the first TEE, the method further comprises: Determining, by the HEE, that the first electrical signal corresponding to the first scanning optical signal is at a first pilot frequency corresponding to the first TEE when the first TEE scans in the first scanning range The amplitude reaches the maximum. The method according to claim 10, wherein said HEE determines that said first electrical signal corresponding to said first scanning optical signal is in said first TEE when said first scanning range is scanned The amplitude at the first pilot frequency corresponding to the first TEE reaches a maximum value, including: Determining, by the HEE, that the first electrical signal corresponding to the first scanning optical signal is at a first pilot frequency corresponding to the first TEE after the first TEE completes one scan in the first scanning range The maximum amplitude at the location; Determining, by the HEE, that the first electrical signal corresponding to the first scanning optical signal is at a first pilot frequency corresponding to the first TEE, when the first TEE performs a second scanning in the first scanning range. The amplitude at which the maximum is reached. The method of claim 10 or 11, wherein the method further comprises: The HEE obtains a fourth electrical signal after performing photoelectric conversion on the first scanning optical signal of the wavelength calibration device; The HEE acquires the fourth electrical signal and the first electrical signal when the amplitude of the first electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE; The HEE determines wavelength deviation information according to the fourth electrical signal and the first electrical signal; The HEE transmits the wavelength deviation information to the first TEE to enable the first TEE to adjust the current wavelength according to the wavelength deviation information. The method of any of claims 10-12, wherein the method further comprises: And acquiring, by the HEE, an optical power of the first scanning optical signal corresponding to the first electrical signal when the amplitude reaches the maximum value; Determining, by the HEE, a target received optical power, wherein the target received optical power is greater than a sum of a receiving sensitivity of a normal transmission of the service data and an equivalent power cost of the transmission link, and a minimum transmission optical power and a maximum uplink of the first TEE. Link loss, difference between the HEE received optical power detection error; Determining, by the HEE, power adjustment information according to a difference between the optical power and the target received optical power; The HEE sends the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information. The method according to claim 1, wherein, when m is smaller than n, before the HEE receives the first scanning optical signals of the m TEEs of the n TEEs respectively sent by the first scanning parameter, The method further includes: The HEE sends a target wavelength to the n TEEs respectively; wherein the target wavelength is a wavelength to which each TEE is to be tuned, and the target wavelengths corresponding to each TEE are different from each other; The HEE receives the respective reported optical signals of the n-m TEEs respectively sent by the n-m TEEs, where the reported optical signals correspond to respective first pilot frequencies, and the reported optical signals are used to indicate the n -m TEEs have a wavelength lock function; The HEE sends a scan stop command to the n-m TEEs according to the reported optical signal. The method of claim 14 wherein the method further comprises: The HEE obtains a first reported electrical signal after performing photoelectric conversion on the reported optical signal of the wavelength calibration device; The HEE performs photoelectric conversion on the reported optical signal to obtain a second reported electrical signal; Determining, by the HEE, wavelength deviation information according to the first reporting electrical signal and the second reporting electrical signal; The HEE sends the wavelength deviation information to a corresponding TEE, respectively, so that the n-m TEEs can adjust the target wavelength according to the corresponding wavelength deviation information. The method of claim 14 or 15, wherein the method further comprises: The HEE acquires optical power of the reported optical signal; Determining, by the HEE, a target received optical power; wherein the target received optical power is greater than a sum of a receiving sensitivity of a normal transmission of the service data and an equivalent power cost of the transmission link, and less than a minimum transmitted light of the n-m TEEs The difference between power and maximum uplink loss, and the HEE received optical power detection error; Determining, by the HEE, power adjustment information according to a difference between the optical power and the target received optical power; The HEE sends the power adjustment information to the n-m TEEs respectively, so that the n-m TEEs adjust the transmit optical power according to the corresponding power adjustment information. The method according to any one of claims 14 to 16, wherein the first pilot parameter further comprises a first pilot modulation depth, the method further comprising: The HEE sends a second pilot parameter and a normal service transmission command to the n-m TEEs, where the second pilot parameter includes a second pilot depth; the second pilot depth is less than the The first pilot modulation depth. The method according to any one of claims 1 to 13, wherein the first pilot parameter further comprises a first pilot modulation depth, the method further comprising: The HEE sends a second pilot parameter and a normal service transmission command to the first TEE; wherein the second pilot parameter includes a second pilot depth; the second pilot depth is smaller than the first pilot Frequency modulation depth. The method of any of claims 1 to 18, wherein the method further comprises: The HEE receives a transmission request sent by a second TEE of the n TEEs; the transmission request is used to request to report information from the reporting information channel RMC; The HEE sends an acknowledgement message to the second TEE to instruct the second TEE to report information through the RMC. A port matching method, comprising: The tail device TEE receives the first pilot parameter and the first scan parameter sent by the head device HEE; wherein the first pilot parameter includes a first pilot frequency; the first scan parameter includes a first scan step and a first a scan range; When the TEE receives the start scan command sent by the HEE, and the TEE is a TEE without a wavelength lock function, the first scan is started according to the first pilot frequency and the first scan parameter. An optical signal to the HEE; When receiving the stop scan command sent by the HEE, the TEE stops the wavelength scanning and keeps the current wavelength unchanged. The method of claim 20, wherein the method further comprises: The TEE continuously detects whether a second scan parameter sent by the HEE is received while transmitting a scan optical signal to the HEE according to the first pilot frequency and the first scan parameter; wherein The second scan parameter includes a second scan step and a second scan range; And when the second scan parameter is different from the first scan parameter, the TEE starts to send a second scan optical signal to the HEE according to the first pilot frequency and the second scan parameter. The method of claim 20, wherein when the TEE is a TEE having a wavelength locking function, the method further comprises: Receiving, by the TEE, a target wavelength sent by the HEE; The TEE tunes its own transmission wavelength to the target wavelength; The TEE sends a report optical signal to the HEE according to the first pilot frequency when receiving the start scan command sent by the HEE; wherein the reported optical signal is used to indicate that the TEE has a wavelength lock Functional TEE; When receiving the stop scan command sent by the HEE, the TEE stops transmitting the reported optical signal and keeps the current wavelength unchanged. The method of any of claims 20-22, wherein the method further comprises: After receiving the wavelength deviation information or the power adjustment information sent by the HEE, the TEE adjusts the current wavelength according to the wavelength deviation information, or adjusts the transmit optical power of the TEE according to the power adjustment information. The method according to any one of claims 20 to 23, wherein before receiving the start scan command of the HEE transmission, the method further comprises: Receiving, by the TEE, initial power adjustment information sent by the HEE; The TEE determines an initial transmit optical power of the TEE according to the initial power adjustment information. The method according to claim 24, wherein the initial power adjustment information is the transmission optical power of the HEE, and the TEE determines the initial transmission optical power of the TEE according to the initial power adjustment information, including: Determining, by the TEE, a link loss according to the transmit optical power and the received optical power of the TEE; The TEE determines that the initial transmitted optical power is a value that is not less than a sum of a minimum optical power, a link loss, and a power margin of the scanning optical signal of the TEE reaching the HEE. The method according to claim 24, wherein the initial power adjustment information is a transmission optical power range of the HEE, and the TEE determines an initial transmission optical power of the TEE according to the initial power adjustment information, including : The TEE determines that any of the transmit optical powers within the transmit optical power range of the HEE is the initial transmit optical power. The method of any of claims 20-26, wherein the method further comprises: The TEE sends a transmission request to the HEE; the transmission request is used to request reporting information from the reporting information channel RMC; After receiving the acknowledgement information sent by the HEE, the TEE sends the report information to the HEE through the RMC. The method of any of claims 20-26, wherein the method further comprises: The TEE sends the report information to the HEE by reporting the information channel RMC. The method of claim 27 or 28, wherein the method further comprises: The TEE uses a low frequency, low modulation depth signal to amplitude modulate the intensity of the traffic data optical signal to generate the RMC. The method according to any one of claims 20 to 29, wherein the first pilot parameter further comprises a first pilot modulation depth, and after the stopping wavelength scanning, the method further comprises: After receiving the second pilot parameter and the normal service sending command sent by the HEE, the TEE starts to send a normal service optical signal and continuously generates a corresponding pilot signal according to the second pilot parameter; The second pilot parameter includes a second pilot modulation depth, the second pilot modulation depth being less than the first pilot modulation depth. The method according to any one of claims 20 to 30, wherein before the TEE receives the start scan command of the HEE transmission, the method further comprises: The TEE performs parameter configuration on the TEE according to the first pilot parameter and the first scan parameter; When the TEE receives the shutdown command sent by the HEE, the parameter configuration process is stopped and the previous configuration is cleared. The method of any of claims 20-31, wherein the method further comprises: In the process of stopping the wavelength scanning, when the TEE receives the abnormal command sent by the HEE, the TEE stops transmitting the first scanning optical signal and receives new tuning information sent by the HEE and new Starting a scan command and transmitting a new scan optical signal to the HEE according to the new tuning information; the tuning information includes a pilot parameter and a scan parameter; the abnormal command includes a target wavelength, a pilot parameter, and a power initialization Command and any one of the start scan commands or random combination. A head end device HEE, comprising: An optical transmitter, configured to separately send a first pilot parameter, a first scan parameter, and a start scan command to the n tail end devices TEE; the first pilot parameter includes a first pilot frequency, and each TEE corresponds to a first One pilot frequency is different from each other; the first scan parameter includes a first scan step and a first scan range; n is a positive integer; a wavelength locking unit, configured to receive a first scanning optical signal that is sent by each of the n TEEs by the first scanning parameter, where the first scanning optical signal sent by each of the m TEEs The information includes a first pilot frequency of each of the TEEs; m is a positive integer less than or equal to n; and determining, according to the first scanning optical signal, whether a transmitting optical wavelength of the first TEE matches a target wavelength channel; And a controller, configured to, when the first TEE is present, control the optical transmitter to send a stop scan command to the first TEE. A head end device HEE according to claim 33, wherein said wavelength locking unit comprises a first photoelectric conversion device and a processing circuit, The first photoelectric conversion device is configured to process the first scan signal to obtain a first electrical signal; The processing circuit is configured to determine whether an amplitude value of the first electrical signal at a first pilot frequency corresponding to each TEE exceeds a preset threshold; wherein, when an amplitude value exceeds the preset threshold And indicating that the transmitting light wavelength of the first TEE is matched with the target wavelength channel, and the TEE corresponding to the first pilot frequency whose amplitude value exceeds the preset value is the first TEE. A head end device HEE according to claim 34, wherein The control unit is further configured to: when the first TEE is present, control the optical transmitter to send the first TEE to the first TEE before controlling the optical transmitter to send a stop scan command to the first TEE a second scan parameter, wherein the second scan parameter comprises a second scan step and a second scan range; the second scan step is smaller than the first scan step, and/or the second scan range is smaller than The first scan range; The first photoelectric conversion device is further configured to receive a second scan light signal sent by the first TEE by the second scan parameter; The processing circuit is further configured to: when the first TEE is scanned in the second scan range, the second electrical signal corresponding to the second scan optical signal is at the first pilot frequency corresponding to the first TEE The amplitude is at its maximum. A head end device HEE according to claim 35, wherein said processing circuit is operative to: Determining that when the first TEE completes one scan in the second scanning range, the second electrical signal obtained by photoelectrically converting the second scanning optical signal by the first photoelectric conversion device is in the first TEE a maximum amplitude at a corresponding first pilot frequency; and determining that the second TEE is performed by the first photoelectric conversion device when the first TEE performs a second scan within the second scan range The amplitude of the second electrical signal obtained by photoelectrically converting the signal at the first pilot frequency corresponding to the first TEE reaches the maximum value. A head end device HEE according to claim 35 or 36, wherein said wavelength locking unit further comprises a wavelength aligning device and a second photoelectric conversion device, The second photoelectric conversion device is configured to perform photoelectric conversion on the second scanning optical signal passing through the wavelength calibration tool to obtain a third electrical signal; The processing circuit is further configured to: acquire the third electrical signal and the second electrical signal when the amplitude of the second electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE a signal; determining wavelength deviation information according to the third electrical signal and the second electrical signal; The controller is further configured to: control the optical transmitter to send the wavelength deviation information to the first TEE, so that the first TEE can adjust the current wavelength according to the wavelength deviation information. The head end device HEE according to any one of claims 35 to 37, wherein the processing circuit is further configured to: acquire the second corresponding to the second electrical signal when the amplitude reaches the maximum value And scanning the optical power of the optical signal; determining the target received optical power; wherein the target received optical power is greater than a sum of a receiving sensitivity of the normal transmission of the service data and an equivalent power cost of the transmission link, and a minimum transmission light smaller than the first TEE Power and maximum uplink loss, the HEE received optical power Detecting a difference in error; determining power adjustment information according to a difference between the optical power and the target received optical power; The controller is further configured to: control the optical transmitter to send the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information. The head end device HEE according to any one of claims 33 to 38, wherein the optical transmitter of the controller separately transmits a first pilot parameter to the n TEEs through a control information channel CIC, A scan parameter and a start scan command. A headend device HEE according to claim 39, wherein said HEE further comprises a modulation driver for amplitude modulating the intensity of the traffic data optical signal using a low frequency, low modulation depth signal to generate said CIC. The head end device HEE according to any one of claims 33 to 40, wherein the controller is further configured to: control the optical transmitter to separately send the transmit optical power of the HEE to the n TEEs Or a transmission optical power range of the HEE; to enable the n TEEs to determine their own initial transmit optical power based on the transmit optical power of the HEE or the transmit optical power range of the HEE. A head end device HEE according to claim 33, wherein said wavelength locking unit further comprises a first photoelectric conversion device and a processing circuit, The processing circuit is configured to determine a first electrical signal obtained by photoelectrically converting the first scanning optical signal by the first photoelectric conversion device when the first TEE scans within the first scanning range The amplitude at the first pilot frequency corresponding to the first TEE reaches a maximum value. The head end device HEE according to claim 42, wherein said processing circuit is configured to: determine that said first photoelectric conversion is performed after said first TEE completes one scan within said first scanning range a maximum value of a first electrical signal obtained by photoelectrically converting the first scan optical signal by the device at a first pilot frequency corresponding to the first TEE; determining that the first TEE is in the first scan range When the second scan is performed, the amplitude of the first electrical signal obtained by photoelectrically converting the first scanning optical signal by the first photoelectric conversion device at the first pilot frequency corresponding to the first TEE reaches The maximum value. A head end device HEE according to claim 42 or 43, wherein said wavelength The locking unit further includes a wavelength aligning tool and a second photoelectric conversion device, The second photoelectric conversion device is configured to perform photoelectric conversion after the first scanning optical signal passing through the wavelength calibration device to obtain a fourth electrical signal; The processing unit is further configured to: acquire the fourth electrical signal and the first electrical signal when the amplitude of the first electrical signal reaches the maximum value at a first pilot frequency corresponding to the first TEE a signal; determining wavelength deviation information according to the fourth electrical signal and the first electrical signal; The controller is further configured to: control the optical transmitter to send the wavelength deviation information to the first TEE, so that the first TEE can adjust the current wavelength according to the wavelength deviation information. The head end device HEE according to claim 43 or 44, wherein the processing circuit is further configured to: acquire the first scanning optical signal corresponding to the first electrical signal when the amplitude reaches the maximum value The optical power of the target is determined; wherein the target received optical power is greater than a sum of a receiving sensitivity of a normal transmission of the service data and an equivalent power cost of the transmission link, and a minimum transmission optical power and a maximum of the first TEE. The difference between the uplink loss and the HEE received optical power detection error; determining the power adjustment information according to the difference between the optical power and the target received optical power; The controller is further configured to: control the optical transmitter to send the power adjustment information to the first TEE, so that the first TEE adjusts the transmit optical power according to the power adjustment information. The head end device HEE according to claim 33, wherein, when m is smaller than n, the controller is further configured to: control the optical transmitter to separately transmit a target wavelength to the n TEEs; The target wavelength is the wavelength to which each TEE is to be tuned, and the target wavelengths corresponding to each TEE are different from each other; The wavelength locking unit is configured to receive respective reported optical signals of the n-m TEEs respectively sent by the n-m TEEs, where the reported optical signals correspond to respective first pilot frequencies, and the reported optical signals are used for Instructing the n-m TEEs to have a wavelength locking function; The controller is further configured to control the optical transmitter to send a scan stop command to the n-m TEEs according to the reported optical signal. The head end device HEE according to claim 46, wherein said wavelength locking unit comprises a wavelength aligning tool, a first photoelectric conversion device, a second photoelectric conversion device, and a processing circuit, The second photoelectric conversion device is configured to perform photoelectric conversion on the reported optical signal passing through the wavelength calibration tool to obtain a first reported electrical signal; The first photoelectric conversion device is configured to perform photoelectric conversion on the reported optical signal to obtain a second reported electrical signal; The processing circuit is configured to determine wavelength deviation information according to the first reporting electrical signal and the second reporting electrical signal; The controller is further configured to: control the optical transmitter to separately send the wavelength deviation information to a corresponding TEE, so that the n-m TEEs can adjust the target wavelength according to the corresponding wavelength deviation information. . The head end device HEE according to claim 46 or 47, wherein the wavelength locking unit is further configured to: acquire optical power of the reported optical signal; determine target received optical power; wherein the target receives light The power is greater than the sum of the receiving sensitivity of the normal transmission of the service data and the equivalent power cost of the transmission link, less than the minimum transmitted optical power and the maximum uplink loss in the n-m TEEs, and the detection error of the HEE receiving optical power. a difference; determining power adjustment information according to a difference between the optical power and the target received optical power; The controller is further configured to: control the optical transmitter to separately send the power adjustment information to the n-m TEEs, so that the n-m TEEs are adjusted according to the corresponding power adjustment information Send optical power. The head end device HEE according to any one of claims 46 to 48, wherein the first pilot parameter further includes a first pilot modulation depth, and the controller is further configured to: control the optical transceiver Transmitting a second pilot parameter and a normal service transmission command to the n-m TEEs, where the second pilot parameter includes a second pilot depth; the second pilot depth is smaller than the first Pilot modulation depth. The head end device HEE according to any one of claims 33 to 45, wherein the first pilot parameter further includes a first pilot modulation depth, and the controller is further configured to: control the optical transceiver Transmitting a second pilot parameter and a normal service transmission command to the first TEE; wherein the second pilot parameter includes a second pilot depth; the second pilot depth is less than the first pilot modulation Deep degree. The head end device HEE according to any one of claims 33 to 50, wherein the HEE further comprises an optical receiver, configured to receive a transmission request sent by a second one of the n TEEs; The transmission request is used to request to report information from the report information channel RMC; The controller is further configured to: control the optical transmitter to send an acknowledgement message to the second TEE, to indicate that the second TEE reports information by using the RMC. A tail end device TEE, comprising: An optical receiver, configured to receive a first pilot parameter and a first scan parameter sent by the head end device HEE; wherein the first pilot parameter includes a first pilot frequency; and the first scan parameter includes a first scan step And the first scan range; An optical transmitter, configured to start sending according to the first pilot frequency and the first scanning parameter when receiving a start scan command sent by the HEE, and the TEE is a TEE having no wavelength locking function a first scanning optical signal to the HEE; And a controller, configured to control the optical transceiver to stop wavelength scanning when receiving the stop scan command sent by the HEE, and keep the current wavelength unchanged. The tail end device TEE according to claim 52, wherein the controller is further configured to: when the optical transmitter transmits the scanning optical signal to the HEE, continuously detect whether the optical receiver continuously detects Receiving a second scan parameter sent by the HEE; wherein the second scan parameter includes a second scan step and a second scan range; when the second scan parameter is different from the first scan parameter, according to The first pilot frequency and the second scan parameter control the optical transmitter to transmit a second scan optical signal to the HEE. The tail end device TEE according to claim 52, wherein when the TEE is a TEE having a wavelength locking function, the optical receiver is further configured to: receive a target wavelength of the HEE transmission; The controller is configured to control the optical transmitter to tune a transmission wavelength of the optical transmitter to the target wavelength; The controller is further configured to: when receiving the start scan command sent by the HEE, according to the Transmitting, by the optical transmitter, the report optical signal to the HEE by the optical transmitter; wherein the reported optical signal is used to indicate that the TEE is a TEE having a wavelength locking function; and when the HEE transmission is received When the scan command is stopped, the optical transmitter is controlled to stop transmitting the reported optical signal and keep the current wavelength unchanged. The tail end device TEE according to any one of claims 52-54, wherein the controller is further configured to: after receiving the wavelength deviation information or power adjustment information sent by the HEE, according to the wavelength The deviation information adjusts the current wavelength, or adjusts the transmitted optical power of the optical transmitter according to the power adjustment information. The tail end device TEE according to any one of claims 52 to 55, wherein the optical receiver is further configured to: receive an initial of the HEE transmission before receiving a start scan command of the HEE transmission Power adjustment information; The controller is further configured to: determine an initial transmit optical power of the optical transmitter according to the initial power adjustment information. The tail end device TEE according to claim 56, wherein said initial power adjustment information is a transmission optical power of said HEE, and said controller is configured to receive light according to said transmission optical power and said TEE The power determines the link loss; determining that the initial transmitted optical power is a value that is not less than a sum of three of a minimum optical power, a link loss, and a power headroom of the scanning optical signal of the TEE reaching the HEE. The tail end device TEE according to claim 56, wherein the initial power adjustment information is a transmission optical power range of the HEE, and the controller is configured to: determine, by the TEE, a range of transmission optical power of the HEE Any of the transmitted optical powers within the transmission is the initial transmitted optical power. The tail end device TEE according to any one of claims 52 to 58, wherein the controller is further configured to: send, by the optical transmitter, a transmission request to the HEE; the transmission request is used for a request And reporting the information from the report information channel RMC; and after receiving the acknowledgement information sent by the HEE, sending the report information to the HEE through the RMC. The tail end device TEE according to any one of claims 52 to 58, wherein the controller is further configured to: send the report information to the HEE by using a report information channel RMC. A tail end device TEE according to claim 59 or 60, wherein said TEE further comprises a modulation driver for amplitude modulating the intensity of the traffic data optical signal using a low frequency, low modulation depth signal to generate said RMC. The tail end device TEE according to any one of claims 52 to 61, wherein the first pilot parameter further comprises a first pilot modulation depth, and the controller is further configured to: when receiving the After the second pilot parameter sent by the HEE and the normal service sending command, the optical transmitter starts to send a normal service optical signal and continuously generates a corresponding pilot signal according to the second pilot parameter; wherein the second guide The frequency parameter includes a second pilot modulation depth, the second pilot modulation depth being less than the first pilot modulation depth. The tail end device TEE according to any one of claims 52 to 62, wherein the controller is further configured to perform the optical transmitter according to the first pilot parameter and the first scan parameter. Parameter configuration; and when the optical receiver receives the shutdown command sent by the HEE, stops the parameter configuration process and clears the previous configuration. The tail end device TEE according to any one of claims 52 to 63, wherein the optical receiver is further configured to: when the stop wavelength scanning is received, receive an abnormal command sent by the HEE And controlling, by the controller, the optical transmitter to stop transmitting the first scanning optical signal, and controlling the optical receiver to receive new tuning information sent by the HEE and a new start scanning command; The device is further configured to: send a new scan optical signal to the HEE according to the new tuning information; the tuning information includes a pilot parameter and a scan parameter; and the abnormal command includes a target wavelength, a pilot parameter, and a power initialization command. And any one or any combination of the start scan commands.

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