Colorless optical network unit and colorless optical network access method

Abstract

The invention provides a colorless optical network access method. The method comprises the following steps: a circulator in an ONU (Optical Network Unit) receives an initial downlink optical signal transmitted by an external optical fiber network; the RC in the ONU is used for screening out a first downlink optical signal of a first wavelength from the initial downlink optical signals and sending the first downlink optical signal to the GPON module; the POF in the ONU screens out a second downlink optical signal of a second wavelength from the initial downlink optical signal under the control of the LDD, and sends the second optical signal to a WDM PHY module, the second wavelength belonging to a preset wavelength range; a WDM PHY module in the ONU processes the second optical signal to obtain a digital signal, and sends the digital signal to an Ethernet control module in the ONU; the Ethernet control module initiates a registration request to an optical line terminal (OLT) based on the digital signal, and the colorless optical network access method provided by the invention realizes the colorless access of plug and play, can save resources and improve the resource utilization efficiency, and significantly simplifies the network deployment and operation and maintenance process.

Description

Technical Field

[0001] This invention relates to the field of colorless optical network technology, and in particular to a colorless optical network unit and a colorless optical network access method. Background Technology

[0002] Currently, fiber optic access networks are at a critical stage of evolution from traditional Time Division Multiplexing Passive Optical Networks (PONs) to next-generation Wavelength Division Multiplexing Passive Optical Networks (WDM-PONs). WDM-PONs, by allocating independent uplink and downlink wavelength pairs to each optical network unit, can provide high-bandwidth, low-latency, and physically isolated high-quality connections, making it a cutting-edge technology that meets the needs of high-value services such as 5G fronthaul and enterprise leased lines.

[0003] In related technologies, there are a large number of optical network units (ONUs) based on fixed wavelengths ("colored light") in existing networks. If upgraded to WDM-PON, it is usually necessary to preset and manually configure a specific wavelength "colored light" ONU for each user, which leads to complex operation and maintenance, difficult spare parts management, and inability to be plug-and-play, which seriously restricts the smooth introduction and large-scale application of the technology. Summary of the Invention

[0004] This invention provides a colorless optical network unit and a colorless optical network access method to solve the problems in the existing technology where there are a large number of ONUs based on fixed wavelengths ("colored light") in the existing network. If upgraded to WDM-PON, it is usually necessary to preset and manually configure a specific wavelength "colored light" ONU for each user, which leads to complicated operation and maintenance, difficult spare parts management, and no plug-and-play functionality. This invention achieves "plug-and-play" colorless access, saves resources, improves resource utilization efficiency, and significantly simplifies network deployment and operation and maintenance processes.

[0005] This invention provides a colorless optical network unit, which includes: a circulator, a thin-film filter (RC), a tunable optical filter (POF), a wavelength division multiplexing (WDM) physical layer (WHY) module, a laser diode driver (LDD), a gigabit passive optical network (GPON) module, and an Ethernet control module. The circulator's first port is connected to the external fiber optic network, the second port is connected to the RC, and the third port is connected to the POF. It is used to acquire the initial downlink optical signal from the external network fiber optic cable and send the downlink optical signal to the RC and POF. The RC and GPON modules are connected to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module. The POF is connected to the Ethernet control module. Under the control of the LDD, the POF is used to filter out the second downlink optical signal of the second wavelength from the initial downlink optical signal and send the second downlink optical signal to the WDM PHY module. The second wavelength is within a preset wavelength range. The WDM PHY module is connected to the Ethernet control module. The WDM PHY module is used to process the second downlink optical signal to obtain a digital signal, and then send the digital signal to the Ethernet control module. The Ethernet control module is used to initiate a registration request to the OLT based on digital signals.

[0006] According to the present invention, a colorless optical network unit is provided, the optical network unit further comprising: a tunable laser; The tunable laser is connected to the fourth port of the circulator and the LDD respectively. The LDD is used to receive control commands from the GPON module and control the tunable laser to emit a first uplink optical signal of the second wavelength according to the control commands. The tunable laser is used to transmit the first uplink optical signal to the circulator.

[0007] According to the colorless optical network unit provided by the present invention, the GPON module is also used for: Generate a second uplink optical signal and send the second uplink optical signal to the circulator; The circulator is also used to perform multiplexing on the first and second uplink optical signals, and couple the combined uplink optical signal to an external fiber optic network for transmission. This invention also provides a colorless optical network access method, applied to an optical network unit (ONU), the method comprising: The circulator in the ONU receives the initial downlink optical signal transmitted from the external fiber optic network. The RC in the ONU is used to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module; Under the control of LDD, the POF in the ONU filters out the second downlink optical signal of the second wavelength from the initial downlink optical signal and sends the second optical signal to the WDM PHY module. The second wavelength is within the preset wavelength range. The WDM PHY module in the ONU processes the second optical signal to obtain a digital signal, and then sends the digital signal to the Ethernet control module in the ONU. The Ethernet control module initiates a registration request to the optical line terminal (OLT) based on digital signals.

[0008] According to the colorless optical network access method provided by the present invention, after the Ethernet control module initiates a registration request to the optical line terminal (OLT) based on digital signals, the method further includes: The process involves multiple wavelength scanning steps until an idle wavelength channel is identified. The Ethernet control module sends a wavelength locking command to the LDD to drive the POF to operate on the idle wavelength channel. The Ethernet control module then uses the LDD to control the tunable laser to adjust to the uplink wavelength channel corresponding to the idle wavelength channel. The wavelength scanning steps include: If it is determined that the current wavelength channel corresponding to the current wavelength is not idle, the Ethernet control module sends a wavelength switching command to the LDD. The LDD drives the POF to switch to a candidate wavelength within a preset wavelength range according to the wavelength switching command; Re-initiate the registration request based on the wavelength channel corresponding to the candidate wavelength; In the first round of wavelength scanning, the current wavelength is the second wavelength.

[0009] According to the present invention, a colorless optical network access method further includes: The LDD receives control commands from the GPON module and controls the tunable laser to emit a first uplink optical signal of a second wavelength according to the control commands. The tunable laser then sends the first uplink optical signal to the circulator. The GPON module in the ONU generates a second uplink optical signal and sends the second uplink optical signal to the circulator in the ONU. The circulator performs a multiplexing process on the first and second uplink optical signals, and couples the combined uplink optical signal to an external fiber optic network for transmission.

[0010] The present invention also provides a colorless optical network access device, comprising the following modules: The receiving module is used to control the circulator in the ONU to receive the initial downlink optical signal transmitted from the external fiber optic network. The first filtering module is used to control the RC in the ONU to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module. The second filtering module is used to control the POF in the ONU to filter out the second downlink optical signal of the second wavelength from the initial downlink optical signal under the control of the LDD, and send the second optical signal to the WDM PHY module, wherein the second wavelength belongs to the preset wavelength range; The first processing module is used to control the WDM PHY module in the ONU to process the second optical signal to obtain a digital signal, and then send the digital signal to the Ethernet control module in the ONU. The registration module is used to control the Ethernet control module to initiate a registration request to the optical line terminal (OLT) based on digital signals.

[0011] According to the present invention, a colorless optical network access device further includes: The scanning module, after the Ethernet control module initiates a registration request to the optical line terminal (OLT) based on digital signals, performs multiple wavelength scanning steps until an idle wavelength channel is identified. The Ethernet control module then sends a wavelength locking command to the LDD to drive the POF to operate on the idle wavelength channel. The Ethernet control module controls the tunable laser via the LDD to adjust to the uplink wavelength channel corresponding to the idle wavelength channel. The wavelength scanning steps include: If it is determined that the current wavelength channel corresponding to the current wavelength is not idle, the Ethernet control module sends a wavelength switching command to the LDD. The LDD drives the POF to switch to a candidate wavelength within a preset wavelength range according to the wavelength switching command; Re-initiate the registration request based on the wavelength channel corresponding to the candidate wavelength; In the first round of wavelength scanning, the current wavelength is the second wavelength.

[0012] According to the present invention, a colorless optical network access device further includes: The control module is used to control the LDD to receive control commands from the GPON module, and according to the control commands, control the tunable laser to emit a first uplink optical signal of a second wavelength. The tunable laser sends the first uplink optical signal to the circulator. The transmitting module is used to control the GPON module in the ONU to generate a second uplink optical signal and send the second uplink optical signal to the circulator in the ONU. The second processing module is used to control the circulator to perform multiplexing processing on the first uplink optical signal and the second uplink optical signal, and couple the multiplexed uplink hybrid optical signal to the external optical fiber network for transmission.

[0013] 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 any of the colorless optical network access methods described above.

[0014] 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 any of the colorless optical network access methods described above.

[0015] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements any of the colorless optical network access methods described above.

[0016] The present invention provides a colorless optical network unit that achieves the separation and processing of GPON signals and WDM signals through the coordinated work of a circulator, RC, POF and WDM PHY module. This allows the ONU to automatically receive and process downlink optical signals without pre-configuring specific wavelengths, realizing "plug and play" colorless access, saving resources, improving resource utilization efficiency, and significantly simplifying network deployment and maintenance processes. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of the colorless optical network unit provided by the present invention.

[0019] Figure 2 This is a flowchart illustrating the colorless optical network access method provided by the present invention.

[0020] Figure 3 This is a schematic diagram of the WDM-PON network topology provided by the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the colorless optical network access device provided by the present invention.

[0022] Figure 5 A schematic diagram of the physical structure of an electronic device is provided. 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] The following is combined with Figure 1 The colorless optical network unit of the present invention is described.

[0025] Figure 1 This is a schematic diagram of the structure of the colorless optical network unit provided by the present invention, as shown below. Figure 1As shown, the colorless optical network unit 10 includes the following: a circulator 101, a thin-film filter (RC) receiver channel module 102, a programmable optical filter (POF) 103, a wavelength division multiplexing physical layer module (WDM PHY) module 104, a laser diode driver (LDD) 105, a gigabit-capable passive optical network (GPON) module 106, and an Ethernet control module 107.

[0026] The circulator has a first port connected to the external fiber optic network, a second port connected to the RC, and a third port connected to the POF. It is used to acquire the initial downlink optical signal from the external network fiber optic cable and send the downlink optical signal to the RC and POF.

[0027] The RC and GPON modules are connected to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module.

[0028] The first wavelength can be, for example, 1310nm or 1490nm, and there is no limitation on it.

[0029] In other words, in this embodiment of the invention, the RC can filter the initial downlink optical signal, allowing only optical signals with wavelengths of 1310nm and 1490nm to pass through, and transmit the filtered signal to the GPON module.

[0030] The POF is connected to the Ethernet control module. Under the control of the LDD, the POF is used to filter out the second downlink optical signal of the second wavelength from the initial downlink optical signal and send the second downlink optical signal to the WDM PHY module.

[0031] The second wavelength is within a preset wavelength range, which is from 1524nm to 1544nm. The second wavelength is any wavelength within the preset wavelength range.

[0032] In other words, in this embodiment of the invention, the POF is used to filter out the second downlink optical signal of the second wavelength from the initial downlink optical signal under the control of the LDD, and send the second downlink optical signal to the WDM PHY module.

[0033] The WDM PHY module is connected to the Ethernet control module. The WDM PHY module is used to process the second downlink optical signal to obtain a digital signal, which is then sent to the Ethernet control module.

[0034] In other words, in this embodiment of the invention, the WDM PHY module can be used to perform general processing such as photoelectric conversion on the second downlink optical signal of the POF to obtain a digital signal, and then send the digital signal to the WDM PHY module.

[0035] The Ethernet control module is used to initiate a registration request to the OLT based on digital signals.

[0036] Among them, the Ethernet control module, based on the ONU involved in the embodiments of the present invention, can support multiple access methods (1G / 2.5G / 10G).

[0037] Optionally, in some embodiments, the optical network unit further includes a tunable laser 108; The tunable laser is connected to the fourth port of the circulator and the LDD. The LDD is used to receive control commands from the GPON module and control the tunable laser to emit a first uplink optical signal of the second wavelength according to the control commands.

[0038] The tunable laser is used to transmit the first uplink optical signal to the circulator.

[0039] In other words, in this embodiment of the invention, the LDD is used to receive control commands from the GPON module, translate the control commands into control signals for the tunable laser, and control the tunable laser to emit a first uplink optical signal of a second wavelength.

[0040] Optionally, in some embodiments, in the uplink direction, the GPON module is also used for: Generate a second uplink optical signal and send the second uplink optical signal to the circulator; The circulator is also used to perform multiplexing of the first and second uplink optical signals, and couple the multiplexed uplink hybrid optical signal to an external optical fiber network for transmission.

[0041] The second uplink optical signal can be, for example, an uplink optical signal with a wavelength of 1310nm, and there are no restrictions on this.

[0042] In other words, in this embodiment of the invention, in the uplink direction, the GPON module can generate a TX wave signal and a WDM TX optical wave signal output by a tunable laser. These signals are then combined using a LOOP three-terminal circulator, and the combined uplink hybrid optical signal is coupled into the same optical fiber for transmission. This achieves single-fiber multi-wave reception and transmission, thereby effectively saving optical fiber lines.

[0043] In this embodiment of the invention, in the downlink direction, the different optical channels of GPON and WDM are filtered by a thin-film filter and a tunable optical filter, and then sent to the GPON or WDM PHY for processing; in the uplink direction, the GPON TX wave signal and the WDM TX wave signal output by the tunable laser are combined by a LOOP three-terminal circulator.

[0044] The present invention provides a colorless optical network unit that achieves the separation and processing of GPON signals and WDM signals through the coordinated work of a circulator, RC, POF and WDM PHY module. This allows the ONU to automatically receive and process downlink optical signals without pre-configuring specific wavelengths, realizing "plug and play" colorless access, saving resources, improving resource utilization efficiency, and significantly simplifying network deployment and maintenance processes.

[0045] Figure 2 This is a flowchart illustrating the colorless optical network access method provided by the present invention, as shown below. Figure 2 As shown, the method includes the following: Step 201: The circulator in the ONU receives the initial downlink optical signal transmitted from the external fiber optic network.

[0046] The colorless optical network access method described in this embodiment of the invention is applied to an optical network unit (ONU).

[0047] The Optical Network Unit (ONU) includes: a circulator, a thin-film filter (RC), a tunable optical filter (POF), a wavelength division multiplexing (WDM) physical layer (WDM) PHY module, a laser diode driver (LDD), a gigabit passive optical network (GPON) module, and an Ethernet control module.

[0048] In this embodiment of the invention, the circulator in the ONU receives the initial downlink optical signal transmitted from the external optical fiber network.

[0049] Step 202: The RC in the ONU is used to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module.

[0050] In this embodiment of the invention, the RC in the ONU is used to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module so that the GPON module can work normally.

[0051] Step 203: Under the control of LDD, the POF in ONU selects the second downlink optical signal of the second wavelength from the initial downlink optical signal and sends the second optical signal to the WDM PHY module. The second wavelength belongs to the preset wavelength range.

[0052] In this embodiment of the invention, the POF in the ONU, under the control of the LDD, filters out a second downlink optical signal of a second wavelength from the initial downlink optical signal and sends the second optical signal to the WDM PHY module. Figure 3 piece.

[0053] For example, after a POF receives optical signals at 2490nm and 2524-2544nm, the specific wavelength signal it selects is determined by its current filtering parameters. For instance, if it is currently operating in the 2524nm channel, it will only allow 2524nm waves to pass through, discarding other optical wave information.

[0054] Step 204: The WDM PHY module in the ONU processes the second optical signal to obtain a digital signal, and sends the digital signal to the Ethernet control module in the ONU.

[0055] In other words, in this embodiment of the invention, after the WDM PHY receives the POF 2524nm light wave, it converts the photoelectric signal into a digital signal and submits it to the Ethernet switching module.

[0056] Step 205: The Ethernet control module initiates a registration request to the optical line terminal (OLT) based on digital signals.

[0057] In this embodiment of the invention, after receiving the digital signal sent by the WDM PHY module, the SWITCH module can initiate a registration request to the optical line terminal (OLT) based on the digital signal.

[0058] In this embodiment of the invention, see Figure 3 , Figure 3 This is a schematic diagram of the WDM-PON network topology provided by the present invention. WDM-PON is a scenario where the central office corresponds to multiple ONU terminals. Therefore, each ONU is in a competitive relationship with the above-mentioned wave channel. That is, each ONU has a dedicated wave channel, but if the channel is detected to be occupied, it is necessary to actively switch to other channels for detection.

[0059] Therefore, optionally, in some embodiments, after the Ethernet control module initiates a registration request to the optical line terminal (OLT) based on digital signals, multiple wavelength scanning steps may be performed until an idle wavelength channel in an idle state is determined. The Ethernet control module sends a wavelength locking command to the LDD to drive the POF to work in the idle wavelength channel. The Ethernet control module controls the tunable laser through the LDD to adjust to the uplink wavelength channel corresponding to the idle wavelength channel.

[0060] The wavelength scanning steps include: if it is determined that the current wavelength channel corresponding to the current wavelength is not idle, the Ethernet control module sends a wavelength switching command to the LDD; the LDD drives the POF to switch to a candidate wavelength within the preset wavelength range according to the wavelength switching command; and the registration request is re-initiated according to the wavelength channel corresponding to the candidate wavelength.

[0061] In the first round of wavelength scanning, the current wavelength is the second wavelength.

[0062] In other words, in this embodiment of the invention, when the current channel is detected to be non-idle, the SWITCH module can send a switching command to the LDD to drive the tunable filter POF to work on the next working channel. If multiple switchings to the next working channel fail to find an idle channel, it indicates that all available channels in the remote system are not idle. The SWITCH module then enters a silent state, sets a timeout period, and then rescans for an idle channel.

[0063] In this embodiment of the invention, when the local optical channel is detected to be idle during registration, the SWITCH module can send a switching command to the LDD to control the tunable laser to switch to the uplink optical channel corresponding to the downlink optical channel, and the SWITCH module will then send a registration request to the remote system via this uplink optical channel.

[0064] Optionally, in some embodiments, the LDD receives control commands from the GPON module and controls the tunable laser to emit a first uplink optical signal of a second wavelength according to the control commands. The tunable laser sends the first uplink optical signal to the circulator. The GPON module in the ONU generates a second uplink optical signal and sends the second uplink optical signal to the circulator in the ONU. The circulator performs a multiplexing process on the first uplink optical signal and the second uplink optical signal, and couples the combined uplink optical signal to an external optical fiber network for transmission.

[0065] In other words, in this embodiment of the invention, the LDD receives the control command from the GPON module and controls the tunable laser to emit a first uplink optical signal of a second wavelength according to the control command. The tunable laser sends the first uplink optical signal to the circulator. The GPON module in the ONU generates a second uplink optical signal and sends the second uplink optical signal to the circulator in the ONU. The circulator performs a multiplexing process on the first uplink optical signal and the second uplink optical signal and couples the combined uplink optical signal to an external optical fiber network for transmission.

[0066] The colorless optical network unit provided by this invention achieves the separation and processing of GPON signals and WDM signals through the coordinated work of circulator, RC, POF and WDM PHY module. This allows the ONU to automatically receive and process downlink optical signals without pre-configuring specific wavelengths, thereby achieving "colorless" operation, simplifying network deployment and maintenance, and supporting flexible wavelength allocation and expansion.

[0067] The colorless optical network access device provided by the present invention is described below. The colorless optical network access device described below and the colorless optical network access method described above can be referred to in correspondence.

[0068] The colorless optical network access method provided by this invention receives composite downlink optical signals through an internal circulator of the ONU, and extracts GPON wavelength signals for use by a fixed filter RC. At the same time, a tunable optical filter POF dynamically selects WDM wavelength signals under the control of LDD and sends them to the WDM PHY module for conversion into digital signals. Finally, it drives the Ethernet control module to automatically initiate registration with the OLT. This enables the ONU to automatically identify, separate and process multi-wavelength services without knowing specific wavelengths in advance, thereby achieving "plug and play" colorless access. It can also save resources, improve resource utilization efficiency, and significantly simplify network deployment and maintenance processes.

[0069] Figure 4 This is a schematic diagram of the structure of the colorless optical network access device provided by the present invention, as shown below. Figure 4 As shown, the device includes the following: The receiving module 401 is used to control the circulator in the ONU to receive the initial downlink optical signal transmitted from the external optical fiber network. The first filtering module 402 is used to control the RC in the ONU to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module. The second filtering module 403 is used to control the POF in the ONU to filter out the second downlink optical signal of the second wavelength from the initial downlink optical signal under the control of the LDD, and send the second optical signal to the WDM PHY module, wherein the second wavelength belongs to the preset wavelength range; The first processing module 404 is used to control the WDM PHY module in the ONU to process the second optical signal to obtain a digital signal and send the digital signal to the Ethernet control module in the ONU. The registration module 405 is used to control the Ethernet control module to initiate a registration request to the optical line terminal (OLT) based on digital signals.

[0070] According to the present invention, a colorless optical network access device further includes: The scanning module (not shown in the figure) is used to perform multiple wavelength scanning steps after the Ethernet control module initiates a registration request to the optical line terminal (OLT) based on digital signals, until an idle wavelength channel is identified. The Ethernet control module sends a wavelength locking command to the LDD to drive the POF to work in the idle wavelength channel. The Ethernet control module controls the tunable laser through the LDD to adjust to the uplink wavelength channel corresponding to the idle wavelength channel. The wavelength scanning steps include: If it is determined that the current wavelength channel corresponding to the current wavelength is not idle, the Ethernet control module sends a wavelength switching command to the LDD. The LDD drives the POF to switch to a candidate wavelength within a preset wavelength range according to the wavelength switching command; Re-initiate the registration request based on the wavelength channel corresponding to the candidate wavelength; In the first round of wavelength scanning, the current wavelength is the second wavelength.

[0071] According to the present invention, a colorless optical network access device further includes: The control module (not shown in the figure) is used to control the LDD to receive control commands from the GPON module, and according to the control commands, control the tunable laser to emit a first uplink optical signal of a second wavelength. The tunable laser sends the first uplink optical signal to the circulator. The transmitting module (not shown in the figure) is used to control the GPON module in the ONU to generate a second uplink optical signal and send the second uplink optical signal to the circulator in the ONU. The second processing module (not shown in the figure) is used to control the circulator to perform multiplexing processing on the first uplink optical signal and the second uplink optical signal, and couple the multiplexed uplink hybrid optical signal to the external optical fiber network for transmission.

[0072] The colorless optical network access method provided by this invention receives composite downlink optical signals through an internal circulator of the ONU, and extracts GPON wavelength signals for use by a fixed filter RC. At the same time, a tunable optical filter POF dynamically selects WDM wavelength signals under the control of LDD and sends them to the WDM PHY module for conversion into digital signals. Finally, it drives the Ethernet control module to automatically initiate registration with the OLT. This enables the ONU to automatically identify, separate and process multi-wavelength services without knowing specific wavelengths in advance, thereby achieving "plug and play" colorless access. It can also save resources, improve resource utilization efficiency, and significantly simplify network deployment and maintenance processes.

[0073] Figure 5 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 5As shown, the electronic device may include: a processor 510, a communications interface 520, a memory 530, and a communication bus 540, wherein the processor 510, the communications interface 520, and the memory 530 communicate with each other via the communication bus 540. The processor 510 can call logical instructions in the memory 530 to execute a colorless optical network access method, which includes: The circulator in the ONU receives the initial downlink optical signal transmitted from the external fiber optic network. The RC in the ONU is used to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module; Under the control of LDD, the POF in the ONU filters out the second downlink optical signal of the second wavelength from the initial downlink optical signal and sends the second optical signal to the WDM PHY module. The second wavelength is within the preset wavelength range. The WDM PHY module in the ONU processes the second optical signal to obtain a digital signal, and then sends the digital signal to the Ethernet control module in the ONU. The Ethernet control module initiates a registration request to the optical line terminal (OLT) based on digital signals.

[0074] Furthermore, the logical instructions in the aforementioned memory 530 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 of 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, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer is able to execute the colorless optical network access method provided by the above methods, the method including: The circulator in the ONU receives the initial downlink optical signal transmitted from the external fiber optic network. The RC in the ONU is used to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module; Under the control of LDD, the POF in the ONU filters out the second downlink optical signal of the second wavelength from the initial downlink optical signal and sends the second optical signal to the WDM PHY module. The second wavelength is within the preset wavelength range. The WDM PHY module in the ONU processes the second optical signal to obtain a digital signal, and then sends the digital signal to the Ethernet control module in the ONU. The Ethernet control module initiates a registration request to the optical line terminal (OLT) based on digital signals.

[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, is implemented to perform the colorless optical network access method provided by the methods described above, the method comprising: The circulator in the ONU receives the initial downlink optical signal transmitted from the external fiber optic network. The RC in the ONU is used to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module; Under the control of LDD, the POF in the ONU filters out the second downlink optical signal of the second wavelength from the initial downlink optical signal and sends the second optical signal to the WDM PHY module. The second wavelength is within the preset wavelength range. The WDM PHY module in the ONU processes the second optical signal to obtain a digital signal, and then sends the digital signal to the Ethernet control module in the ONU. The Ethernet control module initiates a registration request to the optical line terminal (OLT) based on digital signals.

[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 colorless optical network unit, characterized in that, The optical network unit includes: a circulator, a thin-film filter (RC), a tunable optical filter (POF), a wavelength division multiplexing physical layer (WDM) PHY module, a laser diode driver (LDD), a gigabit passive optical network (GPON) module, and an Ethernet control module. The circulator's first port is connected to an external fiber optic network, its second port is connected to the RC, and its third port is connected to the POF. It is used to acquire the initial downlink optical signal of the external network fiber optic cable and send the downlink optical signal to the RC and the POF. The RC and the GPON module are connected and used to filter out a first downlink optical signal of a first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module. The POF is connected to the Ethernet control module. The POF is used to filter out a second downlink optical signal with a second wavelength from the initial downlink optical signal under the control of the LDD, and send the second downlink optical signal to the WDMPHY module. The second wavelength belongs to a preset wavelength range. The WDM PHY module is connected to the Ethernet control module. The WDM PHY module is used to process the second downlink optical signal to obtain a digital signal and send the digital signal to the Ethernet control module. The Ethernet switching module is used to initiate a registration request to the OLT based on the digital signal.

2. The optical network unit according to claim 1, characterized in that, The optical network unit also includes: a tunable laser; The tunable laser is connected to the fourth port of the circulator and the LDD respectively. The LDD is used to receive the control command of the GPON module and control the tunable laser to emit the first uplink optical signal of the second wavelength according to the control command. The tunable laser is used to transmit the first uplink optical signal to the circulator.

3. The optical network unit according to claim 2, characterized in that, The GPON module is also used for: Generate a second uplink optical signal and send the second uplink optical signal to the circulator; The circulator is also used to perform multiplexing processing on the first uplink optical signal and the second uplink optical signal, and couple the multiplexed uplink hybrid optical signal to the external optical fiber network for transmission.

4. A colorless optical network access method, characterized in that, Applied to an optical network unit (ONU), the method includes: The circulator in the ONU receives the initial downlink optical signal transmitted from the external fiber optic network; The RC in the ONU is used to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module; The POF in the ONU, under the control of the LDD, filters out a second downlink optical signal of a second wavelength from the initial downlink optical signal and sends the second optical signal to the WDM PHY module, wherein the second wavelength belongs to a preset wavelength range; The WDM PHY module in the ONU processes the second optical signal to obtain a digital signal, and then sends the digital signal to the Ethernet control module in the ONU. The Ethernet control module initiates a registration request to the optical line terminal (OLT) based on the digital signal.

5. The method according to claim 4, characterized in that, After the Ethernet control module initiates a registration request to the optical line terminal (OLT) based on the digital signal, the method further includes: The process involves performing multiple wavelength scanning steps until an idle wavelength channel is identified. The Ethernet control module then sends a wavelength locking command to the LDD to drive the POF to operate on the idle wavelength channel. The Ethernet control module uses the LDD to control the tunable laser to adjust to the uplink wavelength channel corresponding to the idle wavelength channel. The wavelength scanning steps include: If it is determined that the current wavelength channel corresponding to the current wavelength is not idle, the Ethernet control module sends a wavelength switching command to the LDD. The LDD drives the POF to switch to a candidate wavelength within the preset wavelength range according to the wavelength switching command; Re-initiate the registration request based on the wavelength channel corresponding to the candidate wavelength; In the first round of wavelength scanning, the current wavelength is the second wavelength.

6. The method according to claim 1, characterized in that, The method further includes: The LDD receives the control command from the GPON module and controls the tunable laser to emit a first uplink optical signal of the second wavelength according to the control command. The tunable laser then sends the first uplink optical signal to the circulator. The GPON module in the ONU generates a second uplink optical signal and sends the second uplink optical signal to the circulator in the ONU. The circulator performs a multiplexing process on the first uplink optical signal and the second uplink optical signal, and couples the combined uplink optical signal to the external optical fiber network for transmission.

7. A colorless optical network access device, characterized in that, The device includes: The receiving module is used to control the circulator in the ONU to receive the initial downlink optical signal transmitted from the external optical fiber network; The first filtering module is used to control the RC in the ONU to filter out the first downlink optical signal of the first wavelength from the initial downlink optical signal and send the first downlink optical signal to the GPON module; The second filtering module is used to control the POF in the ONU to filter out a second downlink optical signal of a second wavelength from the initial downlink optical signal under the control of the LDD, and send the second optical signal to the WDM PHY module, wherein the second wavelength belongs to a preset wavelength range; The first processing module is used to control the WDM PHY module in the ONU to process the second optical signal to obtain a digital signal, and send the digital signal to the Ethernet control module in the ONU. The registration module is used to control the Ethernet control module to initiate a registration request to the optical line terminal (OLT) based on the digital signal.

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 colorless optical network access method as described in any one of claims 4 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 colorless optical network access method as described in any one of claims 4 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 colorless optical network access method as described in any one of claims 4 to 6.

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