Wavelength adjustment methods and apparatuses

Abstract

Provided in the embodiments of the present disclosure are wavelength adjustment methods and apparatuses. A wavelength adjustment method comprises: a head-end equipment sending a first optical signal to a first optical multiplexing functional unit, the wavelength of the first optical signal being a first wavelength; and the head-end equipment receiving a first feedback signal from the first optical multiplexing functional unit, and adjusting the wavelength of the first optical signal on the basis of the first feedback signal.

Description

Wavelength adjustment method and apparatus

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese patent application CN202510068768.0 entitled “Wavelength Adjustment Method and Apparatus”, filed on January 15, 2025, and incorporates the entire disclosure of that patent application by reference. Technical Field

[0003] This disclosure relates to the field of communications, and more specifically, to a wavelength adjustment method and apparatus. Background Technology

[0004] Wavelength configuration of the tail-end equipment (TEE) in a metropolitan area access DWDM system is a crucial function. In related technologies, this is typically achieved through a message channel between the head-end equipment (HEE) and the tail-end equipment (TEE). After network management configuration, commands are issued to adjust the TEE's transmit wavelength to the wavelength corresponding to the port of its connected optical multiplexing (OMP) unit. The message channel is usually carried by pilot signals modulated onto the HEE's service signals. Simultaneously, the head-end equipment sends the required wavelength adjustment and instructions to the tail-end equipment via a head-to-tail message channel (HTMC). The tail-end equipment then repeatedly adjusts the wavelength as instructed.

[0005] The wavelength adjustment scheme in related technologies requires manual configuration through network management and command issuance through message channels. It also requires consideration of the rationality of various parameters such as pilot signal power and modulation depth. It can only be completed with the cooperation of many parties, resulting in low efficiency of automatic wavelength adjustment. Summary of the Invention

[0006] This disclosure provides a wavelength adjustment method and apparatus to at least solve the problem of low efficiency in automatic wavelength adjustment in related technologies.

[0007] According to one embodiment of this disclosure, a wavelength adjustment method is provided, comprising: a head-end device sending a first optical signal to a first optical wave combining functional unit, wherein the wavelength of the first optical signal is a first wavelength; the head-end device receiving a first feedback signal from the first optical wave combining functional unit, and adjusting the wavelength of the first optical signal based on the first feedback signal.

[0008] According to another embodiment of this disclosure, a wavelength adjustment method is provided, comprising: a tail device receiving a second optical signal; and, in response to the second optical signal being a matching signal, the tail device adjusting the operating wavelength of a transmitter.

[0009] According to another embodiment of this disclosure, a wavelength adjustment device is provided, comprising: a first optical transceiver module and a first optical wave combining functional unit; the first optical transceiver module is configured to send a first optical signal to the first optical wave combining functional unit, receive a first feedback signal from the first optical wave combining functional unit, and adjust the wavelength information of the first optical signal based on the first feedback signal; the first optical wave combining functional unit includes an input port and a detection port, the input port is configured to receive the first optical signal with wavelength matching, and the detection port is configured to detect whether the first optical signal is a matching signal and send the first feedback signal to the first optical transceiver module.

[0010] According to another embodiment of this disclosure, a wavelength adjustment device is provided, including: a second optical transceiver module and a second optical wave combining functional unit; the second optical wave combining functional unit includes an input port and a detection port; the second optical transceiver module is configured to receive a second optical signal through the input port; the detection port is configured to send a second feedback signal to the second optical transceiver module, the second feedback signal being configured to instruct the tail device to continue or stop adjusting the operating wavelength of the transmitter. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the architecture configuration of a metropolitan area access DWDM system in related technologies;

[0012] Figure 2 is a schematic diagram of the message channel between HEE and TEE in related technologies;

[0013] Figure 3 is a hardware structure block diagram of the computer terminal running the wavelength adjustment method according to an embodiment of this disclosure;

[0014] Figure 4 is a flowchart of a wavelength adjustment method according to an embodiment of the present disclosure;

[0015] Figure 5 is another flowchart of the wavelength adjustment method according to an embodiment of the present disclosure;

[0016] Figure 6 is a structural block diagram of a wavelength adjustment device according to an embodiment of the present disclosure;

[0017] Figure 7 is another structural block diagram of the wavelength adjustment device according to an embodiment of the present disclosure;

[0018] Figure 8 is another structural block diagram of the wavelength adjustment device according to an embodiment of the present disclosure;

[0019] Figure 9 is a schematic flowchart of the wavelength adjustment method of the head-end device according to an embodiment of the present disclosure;

[0020] Figure 10 is another schematic flowchart of the wavelength adjustment method of the head-end device according to an embodiment of the present disclosure;

[0021] Figure 11 is a structural diagram of the head-end wavelength adjustment device according to an embodiment of the present disclosure;

[0022] Figure 12 is a schematic flowchart of the wavelength adjustment method for the tail device according to an embodiment of the present disclosure. Detailed Implementation

[0023] The embodiments of this disclosure will be described in detail below with reference to the accompanying drawings and examples.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of the embodiments of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0025] In related technologies, the current 5G fronthaul network of DWDM systems mainly uses optical modules with a rate of 25 Gbit / s. Considering the further increase in wireless air interface bandwidth in the future, such as for future applications like Massive Multiple-Input Multiple-Output (MIMO) base stations, Ultra 6G (U6G) band base stations, and millimeter-wave base stations, the bandwidth requirements of the fronthaul network will further increase. While maintaining the existing number of ports and fiber resources, the industry needs next-generation fronthaul optical modules with higher speeds. For metropolitan area access DWDM systems, the functional requirements for communication, management, and maintenance of a large number of remote optical modules are becoming increasingly demanding. One problem that needs to be solved is how to quickly and accurately automatically configure the wavelength of remote optical nodes. Only after the wavelength configuration function is completed can the remote optical nodes function normally.

[0026] In related technologies, metropolitan area access DWDM systems are typically applied to the edge access layer of metropolitan area networks, possessing port-independent characteristics. Figure 1 is a schematic diagram of the architecture configuration of a metropolitan area access DWDM system in related technologies. As shown in Figure 1, the system consists of a headend device (HEE), a transmission link, and one or more tailend devices (TEEs). The HEE includes a set of transmitters / receivers and optical multiplexers / optical demultiplexers (OM / OD). The transmission link includes the OM / OD and an optional optical add-drop multiplexer (OADM) for connecting the HEE and the OM / OD, as well as the optional OADM, via a single-fiber bidirectional single fiber. The connection between the OM / OD or OADM and the TEE in the transmission link is also single-fiber bidirectional.

[0027] Figure 2 is a schematic diagram of the message channel between the HEE and TEE in related technologies. As shown in Figure 2, the dashed line represents the message channel between the HEE and TEE. In related technologies, the transmission wavelength of the TEE is usually adjusted to the corresponding wavelength of its connected OM / OD port by a command issued after network management configuration, with the assistance of the message channel between the head-end device (HEE) and the tail-end device (TEE) through the message channel. This technology requires manual configuration through network management and the issuance of commands through the message channel. It also requires consideration of the rationality of various parameters such as the power of the pilot signal and the modulation depth, and requires coordination from multiple aspects to complete.

[0028] The method embodiments provided in this application can be executed in a mobile terminal, computer terminal, or similar computing device. Taking running on a computer terminal as an example, FIG3 is a hardware structure block diagram of a computer terminal running the wavelength adjustment method according to the embodiments of this disclosure. As shown in FIG3, the computer terminal 300 may include one or more (only one is shown in FIG3) processors 301 (processors 301 may include, but are not limited to, processing devices such as microprocessors MCUs or programmable logic devices FPGAs) and a memory 302 for storing data. The computer terminal 300 may also include transmission devices and input / output devices for communication functions. It will be understood by those skilled in the art that the structure shown in FIG3 is only illustrative and does not limit the structure of the computer terminal. For example, the computer terminal 300 may also include more or fewer components than shown in FIG3, or have a different configuration than shown in FIG3.

[0029] The memory 302 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the wavelength adjustment method in this embodiment. The processor 301 executes various functional applications and data processing by running the computer program stored in the memory 302, thereby implementing the above-described method. The memory 302 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 302 may further include memory remotely located relative to the processor 301, and these remote memories can be connected to a computer terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0030] The transmission device is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider for the computer terminal. In one example, the transmission device includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0031] This disclosure provides a wavelength adjustment method. Figure 4 is a flowchart of the wavelength adjustment method according to this disclosure. As shown in Figure 4, the process includes the following steps:

[0032] In step S402, the head-end device sends the first optical signal to the first optical wave combining functional unit, and the wavelength of the first optical signal is the first wavelength.

[0033] The first optical wave combining functional unit mentioned above can be the OM functional entity of the head-end device in Figure 1.

[0034] In this embodiment, the optical wave combiner, the first optical wave combiner, and the second optical wave combiner are the optical wave combiner / optical demultiplexer (OM / OD) in this embodiment. In actual implementation, the terms "head-end device" and "tail-end device" are relative; that is, the same device can be either a head-end device or a tail-end device at different times, both corresponding to an OM / OD. The OM / OD can be set on the device or independently of it. When the device is a head-end device, the optical wave combiner OM is activated; when the device is a tail-end device, the optical demultiplexer OD is activated.

[0035] In an exemplary embodiment, the head-end device transmits a first optical signal to a first optical wavelength combining functional unit, including: the transmitter of the head-end device transmitting the first optical signal to the input port of the first optical wavelength combining functional unit, wherein each input port of the first optical wavelength combining functional unit is matched with a different wavelength from each other.

[0036] In one exemplary embodiment, the first wavelength is any wavelength within a preset wavelength range, which is within the operating wavelength range of the dense wavelength division multiplexing system.

[0037] In step S404, the head-end device receives a first feedback signal from the first optical wave combining functional unit and adjusts the wavelength of the first optical signal based on the first feedback signal.

[0038] In one exemplary embodiment, the head-end device receives a first feedback signal from a first optical wave combining functional unit and adjusts the wavelength of a first optical signal based on the first feedback signal, including: when the input port of the first optical wave combining functional unit matches the first wavelength, the transmitter of the head-end device maintains the first wavelength; when the input port of the first optical wave combining functional unit does not match the first wavelength, the transmitter of the head-end device adjusts the first wavelength until the input port of the first optical wave combining functional unit matches the first wavelength; wherein, the first feedback signal is used to instruct the detection port of the first optical wave combining functional unit to detect whether the first optical signal is a matching signal.

[0039] In this embodiment of the disclosure, the detection port of the first optical wave combiner connected to the head-end device performs effective information detection on the first optical signal, that is, detects whether the input port matches the first wavelength of the first optical signal, which can be achieved by detecting whether there is a service signal of nominal wavelength in the first optical signal.

[0040] In this embodiment of the disclosure, the detection port of the first optical wave combiner connected to the head-end device performs effective information detection on the first optical signal, that is, whether the input port matches the first wavelength of the first optical signal. This can be achieved by detecting the power information of the first optical signal. For example, it can be determined whether the power of the first optical signal meets a certain threshold.

[0041] In an exemplary embodiment, the detection port detects a first optical signal, including: the detection port separates a preset proportion of the first optical signal from the output port of the first multiplexing function unit, and performs information detection on the separated preset proportion of the first optical signal.

[0042] In this embodiment, the detection port of the optical combiner can also be connected to a dedicated optical power meter (OPM) or other detection instruments, such as a spectrometer. Both the optical power meter and the detection instrument can directly detect the operating wavelength and optical power of the optical signal.

[0043] In an exemplary embodiment, the detection port detects the first optical signal by at least one of the following: the detection port detects the wavelength information of the first optical signal; the detection port detects the power information of the first optical signal; the detection port detects the service information of the first optical signal.

[0044] Figure 5 is another flowchart of the wavelength adjustment method according to an embodiment of the present disclosure. As shown in Figure 5, the process includes the following steps:

[0045] In step S502, the tail device receives the second optical signal.

[0046] In one exemplary embodiment, the tail device receives a second optical signal, including: the receiver of the tail device receives the second optical signal through the output port of the second optical multiplexing function unit.

[0047] In step S504, in response to the second optical signal being a matching signal, the tail device adjusts the operating wavelength of the transmitter.

[0048] In an exemplary embodiment, in response to the second optical signal being a matching signal, the tail device adjusts the operating wavelength of the transmitter, including: in response to the second optical signal being a matching signal, the transmitter of the tail device sends a third optical signal to the second optical multiplexing functional unit (corresponding to the OM functional entity of the transmission link in FIG1), the wavelength of the third optical signal being a third wavelength.

[0049] In one exemplary embodiment, the device further includes: a transmitter of the tail device sending a third optical signal to an input port of a second optical wave combining functional unit, wherein each input port of the second optical wave combining functional unit is matched with a different wavelength; and the tail device receiving a second feedback signal from a detection port of the second optical wave combining functional unit, the second feedback signal being used to instruct the tail device to continue or stop adjusting the third wavelength of the third optical signal.

[0050] In one exemplary embodiment, the method further includes: in response to the second optical signal not being a matching signal, the tail device continues to receive the second optical signal until the second optical signal becomes a matching signal.

[0051] In related technologies, when a new transmitter is added to the head-end or tail-end equipment, if the operating wavelength of the new transmitter is consistent with that of the existing transmitter during the setting process, crosstalk will be introduced, affecting the performance of existing services. In such cases, crosstalk can be suppressed by increasing the isolation of the multiplexing function unit, but this will lead to increased costs.

[0052] In this embodiment of the disclosure, when a new transmitter is added to the headend or tailend device and the operating wavelength of the new transmitter needs to be determined, the operating wavelength of the existing transmitter is confirmed, and the operating wavelength of the new transmitter is adjusted to be different from that of the existing transmitter. This operation adds the step of querying the operating wavelength of an existing transmitter when a new transmitter is added to the headend or tailend device. During the setting of the operating wavelength of the new transmitter, it avoids the possibility of it being the same as the operating wavelength of an existing transmitter, thereby avoiding crosstalk problems caused by wavelength conflicts, and without increasing costs.

[0053] The above steps provide a wavelength adjustment method. A first optical signal is sent to a first optical combining functional unit via a head-end device, the wavelength of which is a first wavelength. The head-end device receives a first feedback signal from the first optical combining functional unit and adjusts the wavelength of the first optical signal based on the first feedback signal. This solves the problem of low efficiency in automatic wavelength adjustment in related technologies and achieves the effect of improving the efficiency of automatic wavelength adjustment.

[0054] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solutions of the embodiments of this disclosure, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the embodiments of this disclosure.

[0055] This embodiment also provides a wavelength adjustment device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0056] Figure 6 is a structural block diagram of the wavelength adjustment device according to an embodiment of the present disclosure. As shown in Figure 6, the wavelength adjustment device 60 includes a first optical transceiver module 610 and an optical wave combining functional unit 620. The first optical transceiver module 610 is configured to send a first optical signal to the first optical wave combining functional unit 620, receive a first feedback signal from the optical wave combining functional unit 620, and adjust the wavelength information of the first optical signal based on the first feedback signal. The first optical wave combining functional unit 620 includes an input port and a detection port. The input port is configured to receive a wavelength-matched first optical signal, and the detection port is configured to detect whether the first optical signal is a matched signal and send a first feedback signal to the first optical transceiver module 610.

[0057] In one exemplary embodiment, the first optical transceiver module 610 is disposed on the headend device, and the first optical wave combining functional unit 620 is disposed independently of the headend device; or, both the first optical transceiver module 610 and the first optical wave combining functional unit 620 are disposed on the headend device.

[0058] In the embodiments of this disclosure, the module distribution and composition shown in FIG6 are merely illustrative examples and do not limit the specific hardware composition and layout of the device.

[0059] In one exemplary embodiment, the first optical wave combining functional unit 620 further includes a coupler configured to separate a first optical signal of a preset ratio from the input port to the detection port.

[0060] Figure 7 is another structural block diagram of the wavelength adjustment device according to an embodiment of the present disclosure. As shown in Figure 7, in addition to the first optical transceiver module 610 and the first optical multiplexing function unit 620 shown in Figure 6, the wavelength adjustment device 70 also includes a port detection module 710. The port detection module 710 is connected to the detection port and is configured to detect whether the first optical signal of a preset ratio is a matching signal.

[0061] Figure 8 is another structural block diagram of the wavelength adjustment device according to an embodiment of the present disclosure. As shown in Figure 8, the wavelength adjustment device 80 includes a second optical transceiver module 810 and a second optical wavelength combining functional unit 820. The second optical wavelength combining functional unit 820 includes an input port and a detection port. The second optical transceiver module 810 is configured to receive a second optical signal through the input port. The detection port is configured to send a second feedback signal to the second optical transceiver module 810. The second feedback signal is configured to instruct the tail device to continue or stop adjusting the operating wavelength of the transmitter.

[0062] In one exemplary embodiment, the second optical transceiver module 810 is disposed at the tail end device, and the second optical wave combiner function unit 820 is disposed independently of the tail end device; or, both the second optical transceiver module 810 and the second optical wave combiner function unit 820 are disposed at the tail end device.

[0063] In the embodiments disclosed herein, the module distribution and composition shown in FIG8 are merely illustrative examples and do not limit the specific hardware composition and layout of the device.

[0064] In this embodiment, the wavelength adjustment device may further include different modules, and the naming and functional division of these modules may be selected in different ways according to the actual situation, without any specific limitations.

[0065] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0066] This disclosure also provides a computer-readable storage medium storing a computer program configured to perform the steps in any of the above method embodiments when executed.

[0067] In one exemplary embodiment, the aforementioned computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0068] This disclosure also provides an electronic device including a memory and a processor, the memory storing a computer program and the processor being configured to run the computer program to perform the steps in any of the above method embodiments.

[0069] In one exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0070] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the steps in any of the above method embodiments.

[0071] In one exemplary embodiment, the computer program product described above includes a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the methods described in various embodiments of this application.

[0072] Specific examples in this embodiment can be found in the examples described in the above embodiments and exemplary implementations, and will not be repeated here.

[0073] Obviously, those skilled in the art should understand that the modules or steps of the embodiments of this disclosure described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the embodiments of this disclosure are not limited to any particular combination of hardware and software.

[0074] To enable those skilled in the art to better understand the technical solutions of the embodiments disclosed herein, the following description is provided in conjunction with different embodiments.

[0075] Example 1

[0076] In this embodiment, a method for adjusting the wavelength of the head-end device is described.

[0077] In this embodiment, the optical wave combiner and the first optical wave combiner in the above embodiments are the optical wave combiner / optical demultiplexer (OM / OD) in this embodiment. In actual embodiments, the terms "head-end device" and "tail-end device" are relative; that is, the same device can be a head-end device or a tail-end device at different times, both of which correspond to an OM / OD. The OM / OD can be set on the device or set independently of the device. When the device is a head-end device, the optical wave combiner OM is activated; when the device is a tail-end device, the optical demultiplexer OD is activated.

[0078] In this embodiment, the head-end device has an adjustable wavelength capability. Its transmitter sets its own wavelength to any wavelength within a preset wavelength range and transmits it to a specific port of the optical multiplexer (OM) connected to it. The detection port of the OM detects whether there is a valid optical signal (i.e., a matching signal or a lack of matching) of the wavelength set by the transmitter. If no valid information (i.e., a matching signal or a lack of matching) of the wavelength is detected, the head-end device automatically changes its wavelength to another wavelength within the preset wavelength range, and repeats this process until the detection port of the optical multiplexer detects the information of the wavelength, at which point the head-end device stops changing the wavelength.

[0079] Figure 9 is a schematic flowchart of a wavelength adjustment method for a head-end device according to an embodiment of the present disclosure. As shown in Figure 9, it includes:

[0080] S1, the transmitter of the head-end device sets the initial wavelength and sends the wavelength information to OM.

[0081] In this embodiment of the disclosure, the wavelength information can be transmitted from the transmitter of the head-end device to the OM, i.e., the first optical wave combining functional unit in the above embodiment, in the form of the first optical signal in the above embodiment.

[0082] In this embodiment of the disclosure, the head-end device sets an initial wavelength, which can start sequentially from the first wavelength in a preset wavelength range, or it can start from any other wavelength.

[0083] S2, the detection port of the OM connected to the head-end device does not receive valid information for this wavelength, the transmitter of the head-end device needs to change to the next wavelength and continue to transmit; the detection port of the optical combiner detects the information of this wavelength and sends the information to the receiver of the head-end device.

[0084] In this embodiment of the disclosure, the process of determining whether the detection port of the OM detects valid information of the wavelength information is to determine whether the input port matches the first wavelength of the first optical signal.

[0085] S3, the head-end equipment stops changing wavelengths.

[0086] In this embodiment of the disclosure, the detection port of the OM connected to the headend device performs effective information detection on the first optical signal, that is, whether the detection input port matches the first wavelength of the first optical signal, which can be achieved by detecting whether there is a service signal of the nominal wavelength in the first optical signal.

[0087] Figure 10 is another schematic flowchart of the wavelength adjustment method of the head-end device according to an embodiment of the present disclosure. As shown in Figure 10, it includes:

[0088] S1, the transmitter of the head-end device is set to any wavelength.

[0089] In this embodiment of the disclosure, the head-end device sets an initial wavelength, which can start sequentially from the first wavelength in a preset wavelength range, or it can start from any other wavelength.

[0090] S2, the head-end device sends the first optical signal to the input port of the optical multiplexer to which it is connected.

[0091] S3, the detection port of the optical combiner outputs the first optical signal received from the input port proportionally.

[0092] In this embodiment of the disclosure, the optical multiplexer has a dedicated detection port for detection, which splits a certain proportion (e.g., 5%) of the optical signal through a coupler within the multiplexer.

[0093] In this embodiment, the detection port of the optical combiner can also be connected to a dedicated optical power detection module (OPM). The OPM can directly detect the operating wavelength and optical power of the optical signal.

[0094] S4, determine whether the received optical signal contains a service signal of the nominal wavelength.

[0095] S5, if there is a service signal with the nominal wavelength, the headend equipment stops adjusting the wavelength; if there is no service signal with the nominal wavelength, the transmitter of the headend equipment continues to adjust to another wavelength and continues to transmit.

[0096] In this embodiment of the disclosure, the detection port of the OM connected to the head-end device performs valid information detection on the first optical signal, that is, whether the input port matches the first wavelength of the first optical signal. This can be achieved by detecting the power information of the first optical signal. For example, it can be determined whether the power of the first optical signal meets a certain threshold.

[0097] This disclosure also provides a wavelength adjustment device. Figure 11 is a schematic diagram of the head-end wavelength adjustment device according to this disclosure. As shown in Figure 11, the wavelength self-adjustment device of the head-end device includes an optical transceiver module 1110, an optical multiplexer 1120, and a port detection module 1130. The optical transceiver module 1110 is used to adjust its own wavelength and send an optical signal to the optical multiplexer 1120. The optical multiplexer 1120 is used to connect to the optical transceiver module 1110 and transmit the optical signal containing wavelength information to the link according to the wavelength-port matching relationship. The port detection module 1130 is used to detect whether there is a valid optical signal at the corresponding port of the optical multiplexer 1120, as the basis for whether the optical transceiver module 1110 continues to adjust the wavelength.

[0098] Example 2

[0099] In this embodiment, a method for adjusting the wavelength of the head-end device is described.

[0100] In this embodiment, the optical wave combiner and the second optical wave combiner in the above embodiments are, in this embodiment, the optical wave combiner / optical demultiplexer (OM / OD). In actual implementation, the terms "head-end device" and "tail-end device" are relative; that is, the same device can be either a head-end device or a tail-end device at different times, both corresponding to an OM / OD. The OM / OD can be set on the device or set independently of the device. When the device is a tail-end device, the optical wave combiner OM is activated; when the device is a tail-end device, the optical demultiplexer OD is activated.

[0101] In this embodiment, the tail-end device is connected to a specific port (output port) of the optical demultiplexer OD (i.e., the second optical multiplexing functional unit in the above embodiment). The transmitter at the tail end determines whether the second optical signal it receives through the specific port is a valid second optical signal (i.e., whether the second optical signal matches the output port of the second optical multiplexing functional unit). If it is a valid second optical signal, the transmitter's operating wavelength is set to the wavelength corresponding to the connection port (input port) (i.e., the third optical signal). After setting, the transmitter transmits the third optical signal to the optical demultiplexer and determines whether the third optical signal passes through the OD through the OD's detection port. If it passes, the adjustment of the wavelength of the third optical signal, i.e., the operating wavelength of the tail-end device's transmitter, is stopped, and the wavelength adjustment is automatically completed.

[0102] Figure 12 is a schematic flowchart of a wavelength adjustment method for a tail-end device according to an embodiment of the present disclosure. As shown in Figure 12, it includes:

[0103] S1, the tail device connects to any port of the optical splitter.

[0104] In this embodiment of the disclosure, any port of the optical demultiplexer is any output port of the optical demultiplexer.

[0105] S2, the receiver of the tail device determines whether a valid signal has been received.

[0106] In this embodiment of the disclosure, the receiver of the tail device determines whether it has received a matching signal by judging whether the second optical signal received by the receiver through any output port of the optical splitter matches the output port, that is, judging whether the second optical signal is a matching signal.

[0107] S3, if no matching signal is received, continue to wait.

[0108] In this embodiment of the disclosure, in response to the second optical signal not being a matching signal, the tail device continues to receive the second optical signal until the second optical signal becomes a matching signal.

[0109] S4, if a matching signal is received, the tail device adjusts the wavelength of its transmitter to the wavelength corresponding to the input port of the optical demultiplexer connected to the transmitter.

[0110] In this embodiment of the disclosure, in response to the second optical signal being a matching signal, the transmitter of the tail device sends a third optical signal to the second optical multiplexing functional unit. The wavelength of the third optical signal is a third wavelength. The third wavelength is the wavelength corresponding to the input port of the optical demultiplexer connected to the transmitter.

[0111] S5, after adjustment, send the third optical signal to OD.

[0112] S6, the detection port of OD determines that a third optical signal has been received, stops adjusting the wavelength, and the adjustment is complete.

[0113] In summary, the embodiments of this disclosure provide a wavelength adjustment method. This method relies on the characteristic that a specific port of a multiplexer or demultiplexer is only matched to a specific wavelength. It adopts a decoupling method for wavelength adjustment between the head-end device and the tail-end device, thereby enabling the automatic adjustment of the wavelength of the tail-end device to the wavelength of the head-end device. This effectively solves the problem that the wavelength adjustment of the tail-end device relies on network management and message channels.

[0114] The above description is merely a preferred embodiment of this disclosure and is not intended to limit the scope of this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A wavelength adjustment method, comprising: The head-end device sends a first optical signal to the first optical wave combining functional unit, and the wavelength of the first optical signal is the first wavelength; The head-end device receives a first feedback signal from the first optical wave combining functional unit and adjusts the wavelength of the first optical signal based on the first feedback signal.

2. The method according to claim 1, wherein, The head-end device sends the first optical signal to the first optical multiplexing functional unit, including: The transmitter of the head-end device sends the first optical signal to the input port of the first optical wave combining functional unit, and each input port of the first optical wave combining functional unit is matched with a different wavelength.

3. The method according to claim 2, wherein, The head-end device receives a first feedback signal from the first optical wave combining functional unit, and adjusts the wavelength of the first optical signal based on the first feedback signal, including: When the input port of the first optical wave combining functional unit matches the first wavelength, the transmitter of the head-end device maintains the first wavelength; If the input port of the first optical wave combining functional unit does not match the first wavelength, the transmitter of the head-end device adjusts the first wavelength until the input port of the first optical wave combining functional unit matches the first wavelength. The first feedback signal is used to instruct the detection port of the first optical wave combining functional unit to detect whether the first optical signal is a matching signal.

4. The method according to claim 3, wherein, The detection port detects the first optical signal, including: The detection port separates a preset proportion of the first optical signal from the output port of the first multiplexing function unit, and performs information detection on the separated preset proportion of the first optical signal.

5. The method according to claim 4, wherein, The detection port detects the first optical signal in at least one of the following ways: The detection port detects the wavelength information of the first optical signal; The detection port detects the power information of the first optical signal; The detection port detects the service information of the first optical signal.

6. The method according to claim 1, wherein, The first wavelength is any wavelength within a preset wavelength range, which belongs to the operating wavelength range of the dense wavelength division multiplexing system.

7. A wavelength adjustment method, comprising: The tail end device receives the second optical signal; In response to the second optical signal being a matching signal, the tail device adjusts the operating wavelength of the transmitter.

8. The method according to claim 7, wherein, The tail-end device receives a second optical signal, including: The receiver of the tail device receives the second optical signal through the output port of the second optical wave combining function unit.

9. The method according to claim 8, wherein, In response to the second optical signal being a matching signal, the tail device adjusts the operating wavelength of the transmitter, including: In response to the second optical signal being a matching signal, the transmitter of the tail device sends a third optical signal to the second optical combining functional unit, the wavelength of the third optical signal being a third wavelength.

10. The method according to claim 9, wherein, Also includes: The transmitter of the tail device sends the third optical signal to the input port of the second optical wave combining functional unit, and each input port of the second optical wave combining functional unit is matched with a different wavelength from each other; The tail device receives a second feedback signal from the detection port of the second optical wave combining functional unit. The second feedback signal is used to instruct the tail device to continue or stop adjusting the third wavelength of the third optical signal.

11. A wavelength adjustment method, comprising: When a new transmitter is added to the head-end or tail-end equipment and the operating wavelength of the new transmitter needs to be determined, the operating wavelength of the existing transmitter is confirmed, and the operating wavelength of the new transmitter is adjusted to be different from the operating wavelength of the existing transmitter.

12. A wavelength adjustment device, comprising: First optical transceiver module and first optical wave combiner functional unit; The first optical transceiver module is configured to send a first optical signal to a first optical wave combining functional unit, receive a first feedback signal from the optical wave combining functional unit, and adjust the wavelength information of the first optical signal based on the first feedback signal. The first optical wave combining functional unit includes an input port and a detection port. The input port is configured to receive the first optical signal with wavelength matching, and the detection port is configured to detect whether the first optical signal is a matching signal and send a first feedback signal to the first optical transceiver module.

13. The apparatus according to claim 12, wherein, The first optical wave combining functional unit also includes a coupler. The coupler is configured to separate a preset proportion of the first optical signal from the input port to the detection port.

14. The apparatus according to claim 13, wherein, The device also includes: a port detection module. The port detection module is connected to the detection port and is configured to detect whether the first optical signal of the preset ratio is a matching signal.

15. The apparatus according to claim 12, wherein, The first optical transceiver module is located on the head-end device, and the first optical wave combining function unit is located independently of the head-end device; Alternatively, both the first optical transceiver module and the first optical wave combining functional unit may be located in the head-end device.

16. A wavelength adjustment device, comprising: Second optical transceiver module and second optical wave combiner functional unit; The second optical wave combining functional unit includes an input port and a detection port; The second optical transceiver module is configured to receive a second optical signal through the input port; The detection port is configured to send a second feedback signal to the second optical transceiver module, and the second feedback signal is configured to instruct the tail device to continue or stop adjusting the operating wavelength of the transmitter.

17. The apparatus according to claim 16, wherein, The second optical transceiver module is located in the tail end device, and the second optical wave combining function unit is located independently of the tail end device; Alternatively, both the second optical transceiver module and the second optical wave combining functional unit are located in the tail end device.

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