Registration method and device based on WDM-PON system

Abstract

The invention provides a registration method and device based on a WDM-PON system, and the method comprises the steps: controlling a tunable filter to work in a current downlink wavelength channel, and monitoring the downlink data information of a local side system in a preset time window; under the condition that the downlink data information is not received in the preset time window, switching to the next downlink wavelength channel until the downlink data information is received; determining a channel control parameter of the downlink data information, and determining a target uplink wavelength channel matched with the channel control parameter; and controlling the tunable laser to work in the target uplink wavelength channel based on the driving module, and sending connection request information for registration to the local side system based on the target uplink wavelength channel. According to the invention, automatic search and alignment of wavelength channels are realized, so that the colorless optical network unit can flexibly adapt to different wavelength channels and complete network access registration, thereby realizing an efficient and automatic registration negotiation process under an adjustable WDM-PON system.

Description

Technical Field

[0001] This invention relates to the field of optical communication technology, and in particular to a registration method and apparatus based on a WDM-PON system. Background Technology

[0002] Wavelength Division Multiplexing-Passive Optical Network (WDM-PON) enables point-to-point connections, providing each user with a dedicated wavelength. Its key component is the WDM laser for photoelectric conversion. In optical communication networks, to achieve data transmission between the central office system and the terminal system, the terminal system must first register in the network and establish a link.

[0003] Existing WDM systems typically employ fiber optic communication technology in fixed-wavelength mode. In this mode, link connection registration negotiation is completed within a given wavelength channel. However, WDM-PON technology, due to its unique PON tree network structure, has a mandatory requirement for colorless optical network units. Therefore, how to complete registration negotiation in tunable WDM-PON systems with variable wavelengths is a crucial issue that the industry urgently needs to address. Summary of the Invention

[0004] This invention provides a registration method and apparatus based on a WDM-PON system, which enables the registration negotiation process to be completed in a tunable WDM-PON system with an unfixed wavelength.

[0005] This invention provides a registration method based on a WDM-PON system, comprising the following steps: The driving module based on the optical network unit controls the tunable filter of the optical network unit to operate in the current downlink wavelength channel, and listens for downlink data information of the central office system within a preset time window. If the downlink data information is not received within the preset time window, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel until the downlink data information is received. The downlink data information is parsed to determine the channel control parameters of the downlink data information, and a target uplink wavelength channel that matches the channel control parameters is determined. The drive module controls the tunable laser to operate on the target uplink wavelength channel and sends a connection request for registration to the central office system based on the target uplink wavelength channel.

[0006] According to a registration method based on a WDM-PON system provided by the present invention, the step of parsing the downlink data information and determining the channel control parameters of the downlink data information includes: Extract the digital preamble and channel control status information from the downlink data information, and determine whether the digital preamble matches the local preset preamble of the optical network unit; If the digital preamble matches the local preset preamble, the channel idle status identifier and channel code determined in the channel control status information are used as the channel control parameters.

[0007] According to a registration method based on a WDM-PON system provided by the present invention, before determining the target uplink wavelength channel that matches the channel control parameters, the method further includes: Based on the channel idle state identifier, it is determined that the wavelength channel corresponding to receiving the downlink data information is in an idle state.

[0008] According to a registration method based on a WDM-PON system provided by the present invention, the step of determining that the wavelength channel corresponding to receiving the downlink data information is in an idle state based on the channel idle state identifier further includes: When the wavelength channel corresponding to the received downlink data information is not idle, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel.

[0009] According to a registration method for a WDM-PON system provided by the present invention, after sending connection request information for registration to the central office system based on the target uplink wavelength channel, the method further includes: Listen for registration feedback commands from the central office system; If the registration feedback instruction is determined to be a registration success instruction, the registration of the optical network unit is determined to be complete; If the registration feedback instruction is determined to be a registration failure instruction or the registration success instruction is not received, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel.

[0010] According to a registration method for a WDM-PON system provided by the present invention, the driving module based on the optical network unit controls the tunable filter of the optical network unit to operate in the current downlink wavelength channel, comprising: Obtain the historical wavelength channel record used when the optical network unit last successfully registered; The wavelength channel corresponding to the historical wavelength channel is recorded as the current downlink wavelength channel, and the tunable filter is controlled to operate in the current downlink wavelength channel based on the driving module.

[0011] The present invention also provides a registration device based on a WDM-PON system, comprising the following modules: The monitoring module is used to control the tunable filter of the optical network unit to operate in the current downlink wavelength channel based on the driving module of the optical network unit, and to monitor the downlink data information of the central office system within a preset time window. The switching module is used to control the tunable filter to switch to the next downlink wavelength channel based on the driving module when the downlink data information is not received within the preset time window, until the downlink data information is received. The parsing module is used to parse the downlink data information, determine the channel control parameters of the downlink data information, and determine the target uplink wavelength channel that matches the channel control parameters; The registration module is used to control the tunable laser to operate on the target uplink wavelength channel based on the driving module, and to send connection request information for registration to the central office system based on the target uplink wavelength channel.

[0012] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the registration method based on the WDM-PON system as described above.

[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the registration method based on the WDM-PON system as described above.

[0014] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the registration method based on any of the above-described WDM-PON systems.

[0015] The registration method and apparatus based on a WDM-PON system provided by this invention control a tunable filter through the optical network unit's driving module to scan and monitor downlink wavelength channels. After determining valid downlink data information, the channel control parameters are parsed and obtained, thereby accurately matching the target uplink wavelength channel. Finally, the tunable laser is controlled to send a connection request on the target channel. This effectively solves the problem of difficulty in registration negotiation between the central office and the terminal due to the non-fixed wavelength at the ONU end in WDM-PON systems. Through the automated tuning control of the transceiver devices by the driving module, automatic search and alignment of wavelength channels are achieved, enabling the colorless optical network unit to flexibly adapt to different wavelength channels and complete network registration, thus realizing an efficient and automated registration negotiation process in a tunable WDM-PON system. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the WDM network topology for related methods.

[0018] Figure 2 This is a flowchart illustrating the registration method based on the WDM-PON system provided by the present invention.

[0019] Figure 3 This is a schematic diagram of the hardware architecture of the ONU terminal provided by the present invention.

[0020] Figure 4 This is a schematic diagram of the topology of the adjustable WDM-PON system provided by the present invention.

[0021] Figure 5 This is a schematic diagram of the registration device based on the WDM-PON system provided by the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] like Figure 1The diagram illustrates the WDM network topology of the relevant method. The WDM system specifically includes an Optical Transponder Unit (OTU), an Optical Mux Unit (OMU), an Optical Demux Unit (ODU), a Power Amplifier (BA), a Line Amplifier (LA), a Pre-Amplifier (PA), and an Optical Supervisory Channel (OSC). Service signals from client devices (such as switches and routers) enter the OUT port. Optical signals of different wavelengths output from multiple OTUs converge at the OMU. The combined signal is first amplified by the BA before being sent to the fiber optic link. If the transmission distance is long, it will be relayed and amplified by the LA. Before reaching the receiver, the signal is amplified again by the PA to ensure receiver sensitivity. The OSC also transmits in parallel with the service signal in the fiber. Upon reaching the receiver, the ODU decomposes the mixed light in the fiber back into independent wavelength channels, which are then sent to the corresponding OTUs on the right, finally restoring the service signal for output.

[0025] In related methods, WDM systems employ fixed-wavelength optical fiber communication technology, where the link connection is negotiated and controlled within a given wavelength channel. Due to the unique PON tree network structure, WDM-PON technology has a mandatory requirement for colorless optical network units (ONUs), and therefore can generally only be implemented through tunable WDM systems. The wavelengths used by the ONUs may not be fixed, thus the registration and negotiation functions between the central office and the terminal differ from those in the WDM mode of related methods.

[0026] However, due to its unique PON tree network structure, WDM-PON technology has a mandatory requirement for colorless optical network units, which is typically achieved through tunable WDM systems. In this scenario, the wavelength used by the ONU may be variable (i.e., dynamic or unknown). Since the WDM mode in related methods heavily relies on fixed wavelengths for communication, when applied to a tunable WDM-PON system with variable wavelengths, the terminal cannot directly determine which wavelength to communicate on. This results in the central office and the terminal being unable to complete the registration negotiation function according to the fixed channel mode in the related methods, causing network connection establishment failure or inability to access the network.

[0027] To address the shortcomings of related methods, this invention provides a registration method based on a WDM-PON system. Figure 2 This is a flowchart illustrating the registration method based on a WDM-PON system provided by the present invention, as shown below. Figure 2 As shown, the method includes: Step 210: The driving module based on the optical network unit controls the tunable filter of the optical network unit to work in the current downlink wavelength channel, and listens for downlink data information of the central office system within a preset time window. Step 220: If the downlink data information is not received within the preset time window, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel until the downlink data information is received. Step 230: parse the downlink data information, determine the channel control parameters of the downlink data information, and determine the target uplink wavelength channel that matches the channel control parameters; Step 240: Based on the driving module, control the tunable laser to operate on the target uplink wavelength channel, and send connection request information for registration to the central office system based on the target uplink wavelength channel.

[0028] The technical solution of this invention will be described in detail below, taking the Media Access Control (MAC) module in the optical network unit as an example to illustrate the registration method of the WDM-PON system provided by this invention.

[0029] It should be noted that the registration method based on the WDM-PON system in this invention is applied to ONUs.

[0030] The ONU terminal of this invention has adjustable optical channel for its transmitting and receiving modules, which directly interface with the MAC module to form a pair of transceiver interfaces on the optical path.

[0031] The specific hardware architecture of the ONU is as follows: Figure 3 The hardware architecture diagram of the ONU terminal provided by this invention is shown, specifically including: The Distributed Bragg Reflector (DBR) is mainly responsible for filtering specific wavelengths from the downlink WDM longitudinal wave according to the control instructions of the Laser Diode Driver (LDD) module. It selects a specific wavelength optical signal from multiple optical waves, converts it into a digital signal, and sends it to the MAC module. The Integrable Tunable Laser Assembly (iTLA) is mainly responsible for generating an optical signal of a specified wavelength in the uplink direction according to the control commands of the LDD drive module. It receives digital signals from the MAC module and sends them to the central office system through the specified wavelength channel. The MAC module is responsible for receiving and processing digital signals from the DBR, analyzing the relevant parameters of the current channel of the DBR, and transmitting the digital signals to be sent to the iTLA for transmission. At the same time, the MAC module drives the DBR and iTLA modules through the control driver module. The driver module is mainly responsible for controlling the tunable functions of the iTLA and DBR modules, that is, controlling the optical signals of each module to work in the specified wavelength channel, and is responsible for monitoring and diagnosing iTLA and DBR (such as whether the channel switching is successful, channel transmission and reception optical power, etc.).

[0032] In step 210, the driving module based on the optical network unit controls the tunable filter of the optical network unit to operate in the current downlink wavelength channel, and listens for downlink data information of the central office system within a preset time window.

[0033] The MAC module, as the core control unit, sends commands to the tunable filter through the driver module. Because WDM-PON technology mandates a colorless ONU, the wavelength used by the ONU may not be fixed, thus requiring wavelength negotiation.

[0034] During initialization, the LDD driver module controls the DBR to operate on the current downlink wavelength channel. On this channel, the MAC module enters listening mode, waiting to receive downlink data information from the central office system. The preset time window refers to a given waiting duration used to determine whether a valid central office signal exists on the current channel.

[0035] In step 220, if the downlink data information is not received within the preset time window, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel until the downlink data information is received.

[0036] If the MAC module does not receive valid data from the DBR within a given time window, it determines that the current downlink wavelength channel is unavailable or is not the target channel. At this point, the MAC module drives the LDD driver module to adjust the DBR, making it work in the next wavelength channel.

[0037] The channel switching process described above is a cyclic scanning process. That is, if there is no signal in the current channel, it will continuously switch to the next channel until the MAC module successfully receives data information from the DBR, thereby completing the initial synchronization of the downlink.

[0038] In step 230, the downlink data information is parsed to determine the channel control parameters of the downlink data information, and a target uplink wavelength channel that matches the channel control parameters is determined.

[0039] When the MAC module receives data on a certain channel, it needs to analyze the data content. Channel control parameters refer to the information carried by the central office system in the downlink message to indicate the current network status and configuration.

[0040] Based on the received information, the MAC module analyzes the channel control parameters of the current DBR channel, such as channel ID, channel idle status, and channel connection information. Based on these channel control parameters, the optical network unit can determine which uplink wavelength to transmit on, thus identifying the target uplink wavelength channel.

[0041] In step 240, the tunable laser is controlled to operate on the target uplink wavelength channel based on the driving module, and a connection request information for registration is sent to the central office system based on the target uplink wavelength channel.

[0042] After determining the correct target uplink wavelength channel, the MAC module again uses the LDD driver module to turn on and configure the tunable laser, so that its emission wavelength is precisely aligned with the target uplink wavelength channel.

[0043] The MAC module constructs connection request information containing the registration request, converts the connection request information into a digital signal and transmits it to iTLA, which then sends it to the central office system via the optical path, thereby initiating the formal registration process.

[0044] Optionally, the specific implementation architecture can be as follows: Figure 4 The topology diagram of the adjustable WDM-PON system provided by this invention is shown. The central office broadcasts a request on an idle channel. The terminal ONU uses the MAC module to control the LDD to drive the DBR to poll and scan the downlink wavelength. After capturing the signal, it automatically locks and drives the iTLA to adjust to the matching uplink wavelength to send registration confirmation, thereby completing the automatic wavelength negotiation and connection establishment between the colorless terminal and the central office.

[0045] The registration method based on a WDM-PON system provided by this invention uses the drive module of the optical network unit to control a tunable filter to scan and monitor downlink wavelength channels. After determining valid downlink data information, the method parses and obtains channel control parameters, then accurately matches the target uplink wavelength channel, and finally controls the tunable laser to send a connection request on the target channel. This effectively solves the problem of difficulty in registration negotiation between the central office and the terminal due to the non-fixed wavelength at the ONU end in WDM-PON systems. Through the automated tuning control of the transceiver devices by the drive module, automatic search and alignment of wavelength channels are achieved, enabling the colorless optical network unit to flexibly adapt to different wavelength channels and complete network registration, thus realizing an efficient and automated registration negotiation process in a tunable WDM-PON system.

[0046] In one embodiment, parsing the downlink data information to determine the channel control parameters of the downlink data information includes: Extract the digital preamble and channel control status information from the downlink data information, and determine whether the digital preamble matches the local preset preamble of the optical network unit; If the digital preamble matches the local preset preamble, the channel idle status identifier and channel code determined in the channel control status information are used as the channel control parameters.

[0047] When operating as a terminal system, the MAC module initializes to accept only connection requests from remote systems that conform to a specific format; packets that do not conform to the format are discarded. Downlink data sent by the central office system typically includes a digital preamble of a certain length, channel encoding, and channel control status information.

[0048] The MAC module first extracts the digital preamble from the received message header and compares it with a locally stored preset preamble. This comparison process ensures frame synchronization and verifies the signal, preventing noise or interference signals from being misinterpreted as valid data.

[0049] Only when the current preamble matches successfully does the MAC module confirm that a valid local exchange frame has been received. Subsequently, the MAC module further parses the channel control status information in the message, extracting key parameters, especially the channel idle status flag (indicating whether the current wavelength channel is occupied) and the channel code (indicating the current channel's ID or other configuration attributes). This extracted information constitutes the channel control parameters required for subsequent decisions.

[0050] By verifying the digital preamble, it is ensured that the optical network unit only responds to legitimate central office signals, effectively filtering out invalid messages and interference. At the same time, the channel idle state and encoding are accurately extracted, providing an accurate data foundation for subsequent collision avoidance and correct wavelength selection.

[0051] In one embodiment, before determining the target uplink wavelength channel that matches the channel control parameters, the method further includes: Based on the channel idle state identifier, it is determined that the wavelength channel corresponding to receiving the downlink data information is in an idle state.

[0052] After parsing the channel control status information, the MAC module needs to determine whether the current channel is available. In a WDM-PON system, multiple terminals may be attempting to access the network, or the central office may be communicating with other terminals. Therefore, the MAC module must check the channel idle status flag. Only when this flag indicates that the current wavelength channel is idle will the MAC module continue with the subsequent calculation of the matching wavelength and transmission request process, i.e., driving the LDD to enable iTLA to the matching transmission wavelength channel.

[0053] In one embodiment, determining that the wavelength channel corresponding to receiving the downlink data information is in an idle state based on the channel idle state identifier further includes: When the wavelength channel corresponding to the received downlink data information is not idle, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel.

[0054] If the channel control status information indicates that the current channel is not idle, the MAC module will not send data on that channel to avoid signal collisions or interference with existing communication. At this time, the MAC module will drive the LDD driver module to start adjusting the DBR, making it work in the next wavelength channel, and then jump back to restart the listening and scanning process.

[0055] In one embodiment, after sending connection request information for registration to the central office system based on the target uplink wavelength channel, the method further includes: Listen for registration feedback commands from the central office system; If the registration feedback instruction is determined to be a registration success instruction, the registration of the optical network unit is determined to be complete; If the registration feedback instruction is determined to be a registration failure instruction or the registration success instruction is not received, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel.

[0056] After sending the connection request, the ONU cannot be certain that the registration is successful and must wait for confirmation from the central office. Upon receiving the connection request information from the terminal's MAC address, the central office MAC module will correctly process the digital preamble and channel control status information before determining whether the registration was successful. If successful, the central office will send a registration success command to the terminal system via the corresponding DBR; otherwise, it will send a registration failure command.

[0057] The terminal MAC module completes the registration process based on the received registration success instruction, and then can enter the normal data service transmission stage.

[0058] If a clear failure command is received, or if no feedback is received within a certain time limit, it indicates that registration for the current channel is not feasible. At this point, the MAC module jumps back to the scanning phase, that is, it drives the LDD driver module to control the DBR to switch to the next downlink wavelength channel and continue to attempt registration in other channels.

[0059] By processing the feedback commands from the central office, the optical network unit can clearly understand the registration result and has the ability to automatically recover and retry in case of failure, thus enhancing the robustness of the system.

[0060] In one embodiment, the driving module based on the optical network unit controls the tunable filter of the optical network unit to operate in the current downlink wavelength channel, including: Obtain the historical wavelength channel record used when the optical network unit last successfully registered; The wavelength channel corresponding to the historical wavelength channel is recorded as the current downlink wavelength channel, and the tunable filter is controlled to operate in the current downlink wavelength channel based on the driving module.

[0061] During initialization, the DBR can operate in either the default LDD controlled mode (e.g., scanning from the first in the wavelength list) or by resuming operation from the last successfully established optical channel.

[0062] Specifically, the MAC module or LDD driver module can store the configuration information of the last successful connection. When the system restarts or reinitializes, it will prioritize trying historical wavelength channels.

[0063] Receive information from the remote system. If the historical channel is available, registration time can be greatly reduced. If the historical channel is unavailable, for example, if no data is received after a timeout, switch to the next wavelength channel.

[0064] By optimizing the initial wavelength selection strategy using historical connection data, the wavelength scanning time can be significantly reduced, enabling rapid deployment of optical network units, even without drastic changes in the network topology.

[0065] The registration device based on the WDM-PON system provided by the present invention is described below. The registration device based on the WDM-PON system described below can be referred to in correspondence with the registration method based on the WDM-PON system described above.

[0066] like Figure 5 As shown, the device includes: The monitoring module 510 is used to control the tunable filter of the optical network unit to operate in the current downlink wavelength channel based on the driving module of the optical network unit, and to monitor the downlink data information of the central office system within a preset time window. The switching module 520 is used to control the tunable filter to switch to the next downlink wavelength channel based on the driving module when the downlink data information is not received within the preset time window, until the downlink data information is received. The parsing module 530 is used to parse the downlink data information, determine the channel control parameters of the downlink data information, and determine the target uplink wavelength channel that matches the channel control parameters. The registration module 540 is used to control the tunable laser to operate on the target uplink wavelength channel based on the driving module, and to send connection request information for registration to the central office system based on the target uplink wavelength channel.

[0067] The registration device based on a WDM-PON system provided by this invention controls a tunable filter through the optical network unit's drive module to scan and monitor downlink wavelength channels. After determining valid downlink data information, it parses and obtains channel control parameters, then accurately matches the target uplink wavelength channel, and finally controls the tunable laser to send a connection request on the target channel. This effectively solves the problem of difficulty in registration negotiation between the central office and the terminal due to the non-fixed wavelength at the ONU end in WDM-PON systems. Through the automated tuning control of the transceiver devices by the drive module, automatic search and alignment of wavelength channels are achieved, enabling the colorless optical network unit to flexibly adapt to different wavelength channels and complete network registration, thus realizing an efficient and automated registration negotiation process in a tunable WDM-PON system.

[0068] In one embodiment, the parsing module 530 is specifically used for: The step of parsing the downlink data information to determine the channel control parameters of the downlink data information includes: Extract the digital preamble and channel control status information from the downlink data information, and determine whether the digital preamble matches the local preset preamble of the optical network unit; If the digital preamble matches the local preset preamble, the channel idle status identifier and channel code determined in the channel control status information are used as the channel control parameters.

[0069] In one embodiment, the parsing module 530 is further specifically used for: Before determining the target uplink wavelength channel that matches the channel control parameters, the method further includes: Based on the channel idle state identifier, it is determined that the wavelength channel corresponding to receiving the downlink data information is in an idle state.

[0070] In one embodiment, the parsing module 530 is further specifically used for: The step of determining that the wavelength channel corresponding to receiving the downlink data information is in an idle state based on the channel idle state identifier further includes: When the wavelength channel corresponding to the received downlink data information is not idle, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel.

[0071] In one embodiment, the registration module 540 is specifically used for: After sending the connection request information for registration to the central office system based on the target uplink wavelength channel, the method further includes: Listen for registration feedback commands from the central office system; If the registration feedback instruction is determined to be a registration success instruction, the registration of the optical network unit is determined to be complete; If the registration feedback instruction is determined to be a registration failure instruction or the registration success instruction is not received, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel.

[0072] In one embodiment, the listening module 510 is specifically used for: The driving module based on the optical network unit controls the tunable filter of the optical network unit to operate in the current downlink wavelength channel, including: Obtain the historical wavelength channel record used when the optical network unit last successfully registered; The wavelength channel corresponding to the historical wavelength channel is recorded as the current downlink wavelength channel, and the tunable filter is controlled to operate in the current downlink wavelength channel based on the driving module.

[0073] Figure 6 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 6 As shown, the electronic device may include: a processor 610, a communications interface 620, a memory 630, and a communication bus 640, wherein the processor 610, the communications interface 620, and the memory 630 communicate with each other through the communication bus 640. The processor 610 can call logical instructions in the memory 630 to execute a registration method based on a WDM-PON system. This method includes: controlling the tunable filter of the optical network unit to operate in the current downlink wavelength channel based on the driving module of the optical network unit, and listening to the downlink data information of the central office system within a preset time window; If the downlink data information is not received within the preset time window, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel until the downlink data information is received. The downlink data information is parsed to determine the channel control parameters of the downlink data information, and a target uplink wavelength channel that matches the channel control parameters is determined. The drive module controls the tunable laser to operate on the target uplink wavelength channel and sends a connection request for registration to the central office system based on the target uplink wavelength channel.

[0074] Furthermore, the logical instructions in the aforementioned memory 630 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0075] On the other hand, the present invention also provides a computer program product, the computer program product including a computer program, the computer program being stored on a non-transitory computer-readable storage medium, the computer program being executed by a processor, the computer being able to execute the registration method based on the WDM-PON system provided by the above methods, the method including: controlling the tunable filter of the optical network unit to work in the current downlink wavelength channel based on the driving module of the optical network unit, and listening to the downlink data information of the central office system within a preset time window; If the downlink data information is not received within the preset time window, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel until the downlink data information is received. The downlink data information is parsed to determine the channel control parameters of the downlink data information, and a target uplink wavelength channel that matches the channel control parameters is determined. The drive module controls the tunable laser to operate on the target uplink wavelength channel and sends a connection request for registration to the central office system based on the target uplink wavelength channel.

[0076] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a registration method for a WDM-PON system provided by the above methods, the method comprising: controlling a tunable filter of an optical network unit to operate in the current downlink wavelength channel based on a driving module of the optical network unit, and listening to downlink data information of the central office system within a preset time window; If the downlink data information is not received within the preset time window, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel until the downlink data information is received. The downlink data information is parsed to determine the channel control parameters of the downlink data information, and a target uplink wavelength channel that matches the channel control parameters is determined. The drive module controls the tunable laser to operate on the target uplink wavelength channel and sends a connection request for registration to the central office system based on the target uplink wavelength channel.

[0077] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0078] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A registration method based on a WDM-PON system, characterized in that, include: The driving module based on the optical network unit controls the tunable filter of the optical network unit to operate in the current downlink wavelength channel, and listens for downlink data information of the central office system within a preset time window. If the downlink data information is not received within the preset time window, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel until the downlink data information is received. The downlink data information is parsed to determine the channel control parameters of the downlink data information, and a target uplink wavelength channel that matches the channel control parameters is determined. The drive module controls the tunable laser to operate on the target uplink wavelength channel and sends a connection request for registration to the central office system based on the target uplink wavelength channel.

2. The registration method based on a WDM-PON system according to claim 1, characterized in that, The step of parsing the downlink data information to determine the channel control parameters of the downlink data information includes: Extract the digital preamble and channel control status information from the downlink data information, and determine whether the digital preamble matches the local preset preamble of the optical network unit; If the digital preamble matches the local preset preamble, the channel idle status identifier and channel code determined in the channel control status information are used as the channel control parameters.

3. The registration method based on a WDM-PON system according to claim 2, characterized in that, Before determining the target uplink wavelength channel that matches the channel control parameters, the method further includes: Based on the channel idle state identifier, it is determined that the wavelength channel corresponding to receiving the downlink data information is in an idle state.

4. The registration method based on a WDM-PON system according to claim 3, characterized in that, The step of determining that the wavelength channel corresponding to receiving the downlink data information is in an idle state based on the channel idle state identifier further includes: When the wavelength channel corresponding to the received downlink data information is not idle, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel.

5. The registration method based on a WDM-PON system according to claim 1, characterized in that, After sending the connection request information for registration to the central office system based on the target uplink wavelength channel, the method further includes: Listen for registration feedback commands from the central office system; If the registration feedback instruction is determined to be a registration success instruction, the registration of the optical network unit is determined to be complete; If the registration feedback instruction is determined to be a registration failure instruction or the registration success instruction is not received, the tunable filter is controlled by the driving module to switch to the next downlink wavelength channel.

6. The registration method based on a WDM-PON system according to claim 1, characterized in that, The driving module based on the optical network unit controls the tunable filter of the optical network unit to operate in the current downlink wavelength channel, including: Obtain the historical wavelength channel record used when the optical network unit last successfully registered; The wavelength channel corresponding to the historical wavelength channel is recorded as the current downlink wavelength channel, and the tunable filter is controlled to operate in the current downlink wavelength channel based on the driving module.

7. A registration device based on a WDM-PON system, characterized in that, include: The monitoring module is used to control the tunable filter of the optical network unit to operate in the current downlink wavelength channel based on the driving module of the optical network unit, and to monitor the downlink data information of the central office system within a preset time window. The switching module is used to control the tunable filter to switch to the next downlink wavelength channel based on the driving module when the downlink data information is not received within the preset time window, until the downlink data information is received. The parsing module is used to parse the downlink data information, determine the channel control parameters of the downlink data information, and determine the target uplink wavelength channel that matches the channel control parameters; The registration module is used to control the tunable laser to operate on the target uplink wavelength channel based on the driving module, and to send connection request information for registration to the central office system based on the target uplink wavelength channel.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the registration method based on the WDM-PON system as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the registration method based on the WDM-PON system as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the registration method based on the WDM-PON system as described in any one of claims 1 to 6.

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