Port identification method for splitter, and optical network system, electronic device and medium

Abstract

The present application belongs to the technical field of communications. Disclosed are a port identification method for a splitter, and an optical network system, an electronic device and a medium. The method in the present application comprises: acquiring an optical signal from an optical distribution network, and determining a power code combination for the optical signal, wherein the power code combination is a code combination which is formed, within a passband range of a filter in an optical network unit (ONU), for power ratios of different wavelengths, transmittance code combinations and power code combinations are mapped one by one, and a transmittance code combination is a code combination which is formed, within the passband range of the filter in the ONU, for transmittance ratios of different wavelengths; and on the basis of the power code combination, determining an optical link output port of a splitter to which the ONU is connected.

Description

Port identification method of optical splitter, optical network system, electronic equipment and medium

[0001] Cross-references

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 4, 2023, with application number 202311656483.6 and invention name “Port identification method of splitter, optical network system, electronic device and medium”. The entire contents of the application are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a port identification method for an optical splitter, an optical network system, an electronic device, and a medium. Background Art

[0004] With the development of fiber-optic communication technology, Passive Optical Network (PON) has been rapidly developed and deployed on a large scale. PON is a point-to-multipoint system, which is composed of an optical line terminal (OLT), an optical distribution network (ODN) and an optical network unit (ONU) connected in sequence. Among them, ODN is a passive optical network, which is composed entirely of passive components, mainly including optical fibers and splitters. Since ODN realizes the transmission of optical signals from OLT to ONU through a point-to-point connection method, it has the characteristics of wide coverage area, huge branch optical path data, and complex scenarios. In addition, it has no power supply, which makes it difficult to locate and troubleshoot ODN faults. The accuracy of fault location is particularly important. To achieve fault location, it is necessary to accurately identify the port to which the ONT is connected in the ODN.

[0005] In a passive optical network (PON), to obtain the actual link port information of an optical network unit (ONU) connection, it is necessary to collect ONU-side information for linkage. Based on the ONU optical path design, this information must be collected from the ONU's downstream received power or the ONU's non-service wavelength received power. To collect this information, the following technical solutions are used in related technologies:

[0006] (1) Remote pump amplification technology is used in the design of the optical splitter side. However, this method involves optical amplification technologies such as doping or Raman, and its design cost is also very expensive, which increases the cost of ODN.

[0007] (2) Changing the ONU design to add a receiver that can receive non-service wavelength signals. However, this method requires changing the ONU design, which increases the hardware cost of the ONU and also increases the cost of the ODN. Summary of the Invention

[0008] The main purpose of this application is to provide a port identification method for a splitter, an optical network system, an electronic device and a medium.

[0009] The present application provides a port identification method for an optical splitter, wherein the optical splitter includes M optical link output ports, each optical link output port having a different transmittance coding combination configured corresponding to an optical signal, wherein M is an integer greater than one. The method comprises: obtaining an optical signal from an optical distribution network and determining a power coding combination of the optical signal, wherein the power coding combination is a coding combination formed by power ratios for different wavelengths within a passband range of a filter in an optical network unit (ONU), the transmittance coding combination is mapped one-to-one with the power coding combination, and the transmittance coding combination is a coding combination formed by transmittance ratios for different wavelengths within the passband range of the filter in the ONU; and determining the optical link output port of the optical splitter connected to the ONU based on the power coding combination.

[0010] The present application also provides an optical network system, including an optical distribution network and an optical network unit (ONU), wherein the optical distribution network includes filters and N-level optical splitters, where N is a positive integer; each level of the N-level optical splitters includes at least one optical splitter, and the optical splitter includes M optical link output ports, at least M-1 of the M optical link output ports are correspondingly configured with different filters, and each optical link output port is correspondingly connected to one ONU, wherein M is an integer greater than 1; wherein different filters have different transmittance coding combinations for optical signals, and the transmittance coding combination is a coding combination formed by transmittance ratios for different wavelengths within the passband range of the filter in the ONU.

[0011] The present application also provides an electronic device, which includes: a memory, a processor, and a port identification program for a splitter stored in the memory and runnable on the processor. When the port identification program for the splitter is executed by the processor, the port identification method for the splitter as described above is implemented.

[0012] The present application also provides a computer-readable storage medium, on which a port identification program for an optical splitter is stored. When the port identification program for an optical splitter is executed by a processor, the above-mentioned port identification method for an optical splitter is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0014] FIG1 is a flow chart of a first embodiment of a method for identifying a port of an optical splitter according to the present invention;

[0015] FIG2 is a schematic diagram of the architecture of a PON network system according to an embodiment of the present application;

[0016] FIG3 is a schematic diagram of the structure of an optical network unit in an embodiment of the present application;

[0017] FIG4 is a schematic diagram of a change in received power of an optical network unit in an embodiment of the present application;

[0018] FIG5 is a schematic diagram of the filter property design of the optical splitter for each optical link output port in an embodiment of the present application;

[0019] FIG6 is a schematic diagram of the hardware structure of the electronic device involved in the embodiment of the present application.

[0020] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0026] Currently, in passive optical networks (PONs), obtaining the actual link port information of ONUs (optical network units) requires ONU-side information collection for linkage. Based on the ONU optical path design, this information collection requires the ONU's downstream received power or the ONU's non-service wavelength received power. To collect this information, the following technical solutions are used in related technologies:

[0027] (1) Remote pump amplification technology is used in the design of the optical splitter side. However, this method involves optical amplification technologies such as doping or Raman, and its design cost is also very expensive, which increases the cost of ODN.

[0028] (2) Changing the ONU design to add a receiver that can receive non-service wavelength signals. However, this method requires changing the ONU design, which increases the hardware cost of the ONU and also increases the cost of the ODN.

[0029] Based on this, an embodiment of the present application provides a port identification method for an optical splitter. Referring to FIG1 , FIG1 is a flow chart of an embodiment of a port identification method for an optical splitter of the present application. In this embodiment, the optical splitter includes M optical link output ports, each optical link output port having a different transmittance coding combination configured for an optical signal, wherein M is an integer greater than one, including:

[0030] Step S100: Acquire an optical signal from an optical distribution network and determine a power coding combination of the optical signal, wherein the power coding combination is a coding combination formed by power ratios for different wavelengths within the passband range of the filter in the optical network unit (ONU), and the transmittance coding combination is mapped one-to-one to the power coding combination.

[0031] In this embodiment, the transmittance coding combination is a coding combination formed by the transmittance ratios for different wavelengths within the passband range of the filter in the ONU.

[0032] Exemplarily, at least M-1 optical link output ports among the M optical link output ports are correspondingly configured with filters, and the filters configured for the respective optical link output ports have different transmittance coding combinations for optical signals.

[0033] In one example, M is equal to 5. In this case, at least 4 of the 5 optical link output ports are configured with filters, and the filters configured on each optical link output port have different transmittance coding combinations for optical signals. In another example, M is equal to 8. In this case, at least 7 of the 8 optical link output ports are configured with filters, and the filters configured on each optical link output port have different transmittance coding combinations for optical signals. This embodiment does not impose any specific limitation on this. It is easy to understand that in this embodiment, it is not necessary to configure filters for all optical link output ports. By not setting a filter for one of the optical link output ports, that is, 100% transmission for all wavelengths, and setting different filters for the remaining optical link output ports (different filters have different transmittance coding combinations for optical signals), the optical link output ports configured with filters can have different energy filtering ratios (or transmittance ratios) for specific wavelengths, or energy filtering for different wavelengths (the filtering ratios corresponding to energy filtering for different wavelengths can be the same or different. When the energy filtering ratios are the same, the energy filtering ratios are not 0% filtering or 100% transmission). This can achieve different power coding combinations for the optical signals transmitted from each optical link output port, wherein the power coding combination refers to the coding combination formed by the power ratios of different wavelengths in the optical signal.

[0034] After step S100, step S200 is executed to determine the optical link output port of the optical splitter to which the ONU is connected according to the power coding combination.

[0035] To facilitate understanding, in one example, filter A is provided at optical link output port 1. For an optical signal incident on optical link output port 1 and transmitted through filter A, the power coding combination of the optical signal should be mapped to the transmittance coding combination a corresponding to filter A. For example, the power coding combination mapped to transmittance coding combination a is S1. If the power coding combination of the optical signal transmitted by the optical fiber received by an optical network unit M1 is S1, the branch link port connected to the optical network unit M1 on the optical splitter can be determined to be optical link output port 1. In another example, filter B is provided at optical link output port 2. For an optical signal incident on optical link output port 2 and transmitted through filter B, the power coding combination of the optical signal should be mapped to the transmittance coding combination b corresponding to filter B. For example, the power coding combination mapped to transmittance coding combination b is S2. If the power coding combination of the optical signal transmitted by the optical fiber received by an optical network unit M2 is S2, the branch link port connected to the optical network unit M2 on the optical splitter can be determined to be optical link output port 2.

[0036] In this embodiment, at least M-1 optical link output ports among the M optical link output ports are configured with filters, wherein the filters configured for each optical link output port have different transmittance coding combinations for optical signals, so that when the optical signal incident to the splitter is split to each optical link output port, the filters configured by each optical link output port have different energy filtering ratios (or transmittance ratios) for specific wavelengths, or there is energy filtering for different wavelengths (the filtering ratios corresponding to energy filtering for different wavelengths may be the same or different), so that the optical signals transmitted from each optical link output port have different power coding combinations, and then the branch link port information to which the specified optical network unit is connected on the splitter can be accurately identified based on the power coding combinations of the optical signals transmitted from the optical fibers of different branch ports.

[0037] In one implementation, the optical splitter of the embodiment of the present application may be an optical splitter including N levels, wherein N may be one or an integer greater than or equal to two, and is not specifically limited in this embodiment. It should be noted that the transmittance coding combination configured for the optical signal corresponding to any optical link output port of the same level optical splitter is different. And when N is an integer greater than or equal to two, the transmittance coding combination configured for the optical signal corresponding to any optical link output port of the K-th level optical splitter is different from the transmittance coding combination configured for the optical signal corresponding to any optical link output port of the H-th level optical splitter, H and K are both positive integers, wherein the K-th level optical splitter and the H-th level optical splitter are any two levels in the N-level optical splitter. In this way, the embodiment of the present application can determine which optical link output port in which level of splitter the optical network terminal is connected to based on the power coding combination of the optical signal transmitted from the optical fiber of different branch ports, thereby accurately identifying the branch link port information to which the specified optical network unit is connected on the splitter, thereby solving the problem of link information identification connected to the ONU in the PON network passive ODN network, and can be used for dynamic visual management of ODN resources.

[0038] The present application proposes a port identification method for an optical splitter, an optical network system, an electronic device, and a medium. In the port identification method for an optical splitter, the optical splitter includes M optical link output ports, at least M-1 of the M optical link output ports are correspondingly configured with different filters, and different filters have transmittance coding combinations for optical signals, where M is an integer greater than 1. The technical solution of an embodiment of the present application is to obtain an optical signal from an optical distribution network and determine a power coding combination of the optical signal, wherein the power coding combination is a coding combination formed for power ratios of different wavelengths within the passband range of the filter in the optical network unit ONU, and the transmittance coding combination is consistent with the power coding combination. The transmittance coding combination is mapped one by one, and the transmittance coding combination is a coding combination formed by the transmittance ratio of different wavelengths within the passband range of the filter in the ONU. Then, based on the power coding combination, the optical link output port of the splitter connected to the ONU is determined, so that the embodiment of the present application utilizes the passband sideband effect of the filter to combine the branch ports with different reflectance ratios at the optical network unit (ONU) end and the optical distributed network (ODN) end to form different power change relationships (i.e., power coding combinations) for different branch ports, thereby facilitating accurate identification of the branch link port information to which the specified optical network unit is connected on the splitter based on the received different power change relationships.

[0039] Compared with the port identification scheme for the optical splitter in the related art, the embodiment of the present application can continue to use the hardware structure of the optical splitter and ONU in the original optical network system, without the need to design and adopt remote pump amplification technology on the splitter side, and without changing the original ONU structure design to add a receiver that can receive non-service wavelength signals, thereby achieving accurate identification of the port of the optical splitter connected to the ONU while reducing the cost of ODN.

[0040] In one possible embodiment, the passband range includes the operating band of the service light and the sideband bands distributed on both sides of the operating band. The transmittance coding combination is a coding combination formed by the transmittance ratio of different sideband wavelengths in the sideband band, and the power coding combination is a coding combination formed by the power ratio of different sideband wavelengths in the sideband band.

[0041] In this embodiment, the operating wavelength band of the service light refers to the wavelength range corresponding to the operating wavelength of the service light. Specifically, it can be based on the operating wavelength and fluctuate around a first preset wavelength. Due to the filter coating transition band and design redundancy of the filter in the optical network unit (ONU), the passband range of the filter, in addition to covering the operating wavelength, reserves additional wavelength bands above and below the operating wavelength. Specifically, it can be based on the operating wavelength and fluctuate around a second preset wavelength. This second preset wavelength range (i.e., the reserved wavelength band) is the sideband band. The sideband band refers to the wavelength range within the passband range of the filter other than the operating wavelength, and the sideband bands are located on both sides of the operating wavelength. To facilitate understanding, two examples are given. In one example, the filter in the optical network unit (ONU) not only provides 100% transmission of the operating wavelength λ±10nm of the OLT's TX (transmitter) transmitter (in this case, 10nm is the first preset wavelength), but also, due to the filter coating transition band and design redundancy, 100% transmission of the entire filter band of λ±14nm. In this case, the operating wavelength band is [λ-10nm, λ+10nm], and the sideband bands are [λ-14nm, λ-10nm) and (λ+10nm, λ+14nm]. Those skilled in the art will appreciate that wavelengths within the sideband band are optical energy without digital signals and are simply zero-level signals, without modulation signals.

[0042] In another example, the filter in the optical network unit ONU can not only transmit the operating wavelength λ±10nm of the OLT's TX (Transmitter) transmitting end 100% (in this case, 10nm is the first preset wavelength), but also transmit the entire filter band λ±16nm 100% due to the filter coating transition band and design redundancy. At this time, the working band is [λ-10nm, λ+10nm], and the sideband band is [λ-16nm, λ-10nm), and (λ+10nm, λ+16nm]. It should be noted that the many details shown in the above two examples are only used to understand the embodiments of the present application and do not constitute a limitation on the embodiments of the present application. It is known to those skilled in the art that the wavelength within the sideband band is light energy without digital signals, only a 0-level signal, and no modulation signal. At this time, the BOSA (bi-directional optical sub-assembly, optical transmitting and receiving component) of each ONU not only receives the downlink service optical signal within the working band sent by the OLT (optical line terminal), but also receives the WDM (Wavelength Division Optical signals within the sideband band transmitted by a wavelength division multiplexing (WDM) laser or tunable laser are filtered for specific wavelengths within the sideband band according to filters configured at each optical link output port. (Since wavelengths within the sideband band do not carry digital signals, or in other words, do not carry service information, filtering of wavelengths within the sideband band does not affect the signal quality of the entire service optical signal.) Each optical link output port is configured with a different filter, and different filters form different coding combinations for the transmittance ratios of sideband wavelengths within the sideband band. As a result, the optical signals transmitted from each optical link output port have different power coding combinations. The power coding combination is a coding combination formed by the power ratios of different sideband wavelengths within the sideband band. Furthermore, based on the power coding combinations of optical signals transmitted from the optical fibers of different branch ports, the branch link port information to which a specified optical network unit is connected on the optical splitter can be accurately identified.

[0043] It is worth mentioning that the embodiments of the present application provide a method for causing fluctuations in the downstream received power on the ONU side by utilizing the passband sideband effect of the ONU-side receiving filter. This method does not require the deployment of expensive optical amplification equipment or changes to the ONU design. Compared to the port identification scheme for optical splitters in related technologies, the embodiments of the present application can continue to use the hardware structure of the optical splitter and ONU in the original optical network system, eliminating the need to design remote pump amplification technology on the optical splitter side and the need to change the original ONU structure design to add a receiver that can receive non-service wavelength signals. This achieves accurate identification of the port of the optical splitter connected to the ONU while reducing the cost of the ODN.

[0044] In this embodiment, different ONUs are connected to different ODN branch ports, each designed with different wavelength and reflectivity or transmittance coding combinations. When transmitting an optical signal at a different wavelength, the ONU's BOSA receives different optical signal powers. These different powers correspond to the port's reflectivity or transmittance design. Therefore, the combined transmitted wavelength and the power received by the ONU's BOSA can be mapped to the port's preset wavelength and reflectivity or transmittance coding, thereby locating the optical link output port of the optical link splitter to which the ONU is connected.

[0045] In one embodiment, the step of determining the optical link output port of the optical splitter to which the ONU is connected according to the power coding combination includes:

[0046] Step A10: determining first link port information of the power coding combination mapping based on a first preset mapping relationship, and determining an optical link output port of the optical splitter connected to the ONU according to the first link port information.

[0047] In this embodiment, the first preset mapping relationship includes a one-to-one mapping relationship between each power coding combination and the first link port information. Different power coding combinations are mapped to different first link port information. It is understood that the first preset mapping relationship can be pre-stored in the system of the electronic device that serves as the execution subject of the embodiment of the present application.

[0048] This embodiment determines the first link port information of the power coding combination mapping based on the first preset mapping relationship, and accurately determines the optical link output port of the optical splitter to which the ONU is connected according to the first link port information.

[0049] In another embodiment, the step of determining the optical link output port of the optical splitter to which the ONU is connected according to the power coding combination includes:

[0050] Step B10: Calculate the difference between the power coding combination and the power of the target coding combination belonging to the same sideband wavelength to obtain a difference coding combination.

[0051] Among them, the target coding combination is a coding combination formed by the power ratio of different sideband wavelengths in the sideband band in the optical signal input to the optical link input port of the optical splitter. The target coding combination is the coding combination formed by the power ratio of different sideband wavelengths in the sideband band of the input optical signal, wherein the input optical signal is the optical signal input to the filter configured at the output port of the optical link. It can be understood that the difference coding combination is the coding combination obtained by taking the difference between the power of the input optical signal and the output optical signal for the same sideband wavelength. Among them, the output optical signal is the optical signal output from the filter configured at the output port of the optical link. It is easy to understand that the difference coding combination can be used to characterize the filtering properties of the filter for filtering a specific wavelength, for example, it can be specifically characterized as the energy filtering ratio (or transmittance) of the filter for each wavelength in the sideband band.

[0052] Step B20: Determine the second link port information of the differential coding combination mapping based on the second preset mapping relationship, and determine the optical link output port of the optical splitter connected to the ONU according to the second link port information.

[0053] In this embodiment, the second preset mapping relationship includes a one-to-one mapping relationship between each difference code combination and the second link port information. Different difference code combinations map to different second link port information. It is understood that the second preset mapping relationship may be pre-stored in the system of the electronic device that serves as the execution subject of the embodiment of this application.

[0054] This embodiment determines the second link port information of the difference coding combination mapping based on the second preset mapping relationship, and accurately locates the optical link output port of the optical splitter to which the ONU is connected according to the second link port information.

[0055] In yet another embodiment, the step of determining the optical link output port of the optical splitter to which the ONU is connected according to the power coding combination includes:

[0056] Step C10: acquiring the power of the target sideband wavelength in the power coding combination, and determining third link port information of the power mapping of the target sideband wavelength based on a third preset mapping relationship;

[0057] Step C20: Determine the optical link output port of the optical splitter to which the ONU is connected according to the third link port information.

[0058] In this embodiment, the third preset mapping relationship includes a one-to-one mapping relationship between each power of the target sideband wavelength and the third link port information. Different power levels of the target sideband wavelength are mapped to different third link port information. It is understood that the third preset mapping relationship may be pre-stored in the system of the electronic device that serves as the execution subject of the embodiment of this application.

[0059] In this embodiment, it should be noted that different optical link output ports have different transmittances for the target sideband wavelength. Specifically, the filters configured for different optical link output ports have different filtering ratios for the target sideband wavelength, resulting in different powers of the target sideband wavelength transmitted from each optical link output port. This allows the power of the target sideband wavelength in the power coding combination to be obtained, and based on the third preset mapping relationship, the branch link port information to which the specified optical network unit is connected on the optical splitter can be accurately identified.

[0060] In yet another embodiment, the step of determining the optical link output port of the optical splitter to which the ONU is connected according to the power coding combination includes:

[0061] Step D10: Acquire the power of the target sideband wavelength in the power coding combination, and calculate the power difference between the power of the target sideband wavelength and the target power.

[0062] It should be noted that different optical link output ports have different transmittances for the target sideband wavelength. Specifically, the filters configured for different optical link output ports have different filtering ratios for the target sideband wavelength, so that the power of the target sideband wavelength transmitted from each optical link output port is different.

[0063] In this embodiment, the target power is the power of the target sideband wavelength in the optical signal input to the optical link input port of the optical splitter. The target power is also the power of the target sideband wavelength of the input optical signal, wherein the input optical signal is the optical signal input to the filter configured by the optical link output port. The power difference is the power value obtained by taking the difference between the power of the input optical signal and the output optical signal for the target sideband wavelength. The output optical signal is the optical signal output from the filter configured by the optical link output port. It is easy to understand that the power difference can be used to characterize the filtering properties of the filter for filtering the target sideband wavelength, for example, it can be specifically characterized as the energy filtering ratio (or transmittance) of the filter for the target sideband wavelength.

[0064] Step D20: determining fourth link port information of the power difference mapping based on a fourth preset mapping relationship, and determining the optical link output port of the optical splitter to which the ONU is connected according to the fourth link port information.

[0065] In this embodiment, the fourth preset mapping relationship includes a one-to-one mapping relationship between each power difference value and the fourth link port information. Different power differences are mapped to different fourth link port information. It is understood that the fourth preset mapping relationship can be pre-stored in the system of the electronic device that serves as the execution subject of the embodiment of the present application.

[0066] The embodiment of the present application obtains the power of the target sideband wavelength in the power coding combination, calculates the power difference between the power of the target sideband wavelength and the target power, and determines the fourth link port information mapped to the power difference based on the fourth preset mapping relationship. Then, based on the fourth link port information, the optical link output port of the splitter to which the ONU is connected is accurately determined.

[0067] In order to help understand the technical principles or technical concepts of the embodiments of the present application, a specific embodiment 1 is listed, in which:

[0068] The embodiment of the present application discloses a method for causing fluctuations in the downstream received power on the ONU side by utilizing the passband sideband effect of the ONU-end receiving filter. This method does not require the deployment of expensive equipment required for optical amplification, nor does it require changes to the ONU design. As shown in Figure 3, the ONU optical path design includes a 0-degree filter. The design of the 0-degree filter is generally slightly wider than the standard passband due to the production process. As shown in Figures 4 and 5, if a signal corresponding to the filter sideband wavelength is sent in the downstream direction, the signal will also be received, thereby increasing the DC component of the service signal, thereby causing changes in the received power on the ONU side. At the same time, due to the effect of AC coupling, it will not affect the judgment of the service signal.

[0069] As shown in Figure 2, Figure 2 is a schematic diagram of the architecture of the PON network system in an embodiment of the present application. In this embodiment, the OLT design can be used to control the WDM laser to emit different wavelengths within several channel sidebands, so that the passband sideband effect of the ONU-end receiving filter is combined with the branch ports with different reflectance ratios on the ODN end to form different power fluctuations at different branch ports. The branch link port information to which the specified ONU is connected is identified through the different power change values ​​received after the ONU end responds to the OLT transmission.

[0070] By cleverly utilizing the extended sideband effect of the filter in a PON (passive optical network) ONU BOSA (bi-directional optical sub-assembly), this embodiment eliminates the need for remote pump amplification technology on the optical splitter side, adds a receiver capable of receiving non-service wavelength signals without changing the original ONU structure, or adding wavelength shifting or gain components to increase overall costs. This allows accurate identification of the optical splitter port to which the ONU is connected, while reducing the cost of the ODN. This approach also eliminates any interference with service signals, resulting in a lossless upgrade that improves network intelligent management efficiency.

[0071] It should be noted that the above-mentioned specific embodiment 1 is only used to help understand the technical principles or technical concepts of the embodiments of this application, and does not constitute a limitation of this application. More simple transformations based on this technical concept should all be within the scope of protection of this application.

[0072] In one implementation, to help understand the technical principles or technical concepts of the embodiments of the present application, another specific embodiment 2 is listed, including:

[0073] An embodiment of the present application designs a method for implementing ONU (optical network unit) power perturbation in a PON network. The method is based on the sideband band of the passband range of the 0-degree receiving filter of the PON system ONU BOSA. The sideband band can be received by the ONU receiving system through the 0-degree filter, as shown in Figure 3, thereby increasing the DC component of the ONU (optical network unit) receiving signal, thereby achieving perturbation of the received signal power.

[0074] The downlink service signal passband is 4 to 6 nm on both sides. For example, the OLT TX service signal wavelength is λ±10 nm, and the sideband signal operating wavelength is λ-16 nm to λ-10 nm & λ+10 nm to λ+16 nm.

[0075] The above-mentioned receive signal is received by the ONU BOSA module, which does not need to be modified. Its single-fiber bidirectional BOSA receiving detector has a 0-degree filter at the front end. This filter not only provides 100% transmission of the OLT (Optical Line Terminal) TX transmitter operating wavelength λ±10nm, but also 100% transmission of the entire filter band of λ±14nm or λ±16nm due to the filter coating transition band and design redundancy.

[0076] The received signal is transmitted by a transmitter module designed by the OLT. This module uses a laser, a multi-laser array, or wavelength tuning technology to select one or more wavelengths within the sideband to transmit optical signals without data modulation. After being combined with the downstream service optical signal, it reaches the ONU BOSA module via the optical network. The transmitter module can be integrated into the OLT optical module, or it can be a standalone board or device.

[0077] Furthermore, since PON ODN is a typical passive point-to-multipoint method, in order to be able to identify the link port information to which a specified ONU is connected, combined with the design of the optical splitter in the optical network and the above-mentioned ONU power disturbance method, each different ONU generates a different power disturbance. According to the different power disturbance values ​​received by different ONUs, corresponding to the port design of the optical splitter, the port information where the ONU is located can be identified.

[0078] It should be noted that the above-mentioned specific embodiment 2 is only used to help understand the technical principles or technical concepts of the embodiments of this application, and does not constitute a limitation of this application. More simple transformations based on this technical concept should all be within the scope of protection of this application.

[0079] In addition, an embodiment of the present application further provides an optical network system, comprising an optical distribution network and an optical network unit (ONU), wherein the optical distribution network comprises a filter and N-level optical splitters, where N is a positive integer;

[0080] Each level of the N-level optical splitter includes at least one optical splitter, the optical splitter includes M optical link output ports, at least M-1 optical link output ports among the M optical link output ports are correspondingly configured with different filters, and each optical link output port is correspondingly connected to one ONU, wherein M is an integer greater than one;

[0081] Among them, different filters have different transmittance coding combinations for optical signals, and the transmittance coding combination is a coding combination formed by transmittance ratios for different wavelengths within the passband range of the filter in the ONU.

[0082] In one example, M is equal to 5. In this case, at least 4 of the 5 optical link output ports are configured with filters, and the filters configured on each optical link output port have different transmittance coding combinations for optical signals. In another example, M is equal to 8. In this case, at least 7 of the 8 optical link output ports are configured with filters, and the filters configured on each optical link output port have different transmittance coding combinations for optical signals. This embodiment does not impose any specific limitation on this. It is easy to understand that in this embodiment, it is not necessary to configure filters for all optical link output ports. By not setting a filter for one of the optical link output ports, that is, 100% transmission for all wavelengths, and setting different filters for the remaining optical link output ports (different filters have different transmittance coding combinations for optical signals), the optical link output ports configured with filters can have different energy filtering ratios (or transmittance ratios) for specific wavelengths, or energy filtering for different wavelengths (the filtering ratios corresponding to energy filtering for different wavelengths can be the same or different. When the energy filtering ratios are the same, the energy filtering ratios are not 0% filtering or 100% transmission). This can achieve different power coding combinations for the optical signals transmitted from each optical link output port, wherein the power coding combination refers to the coding combination formed by the power ratios of different wavelengths in the optical signal.

[0083] To facilitate understanding, in one example, filter A is provided at optical link output port 1. For an optical signal incident on optical link output port 1 and transmitted through filter A, the power coding combination of the optical signal should be mapped to the transmittance coding combination a corresponding to filter A. For example, the power coding combination mapped to transmittance coding combination a is S1. If the power coding combination of the optical signal transmitted by the optical fiber received by an optical network unit M1 is S1, the branch link port connected to the optical network unit M1 on the optical splitter can be determined to be optical link output port 1. In another example, filter B is provided at optical link output port 2. For an optical signal incident on optical link output port 2 and transmitted through filter B, the power coding combination of the optical signal should be mapped to the transmittance coding combination b corresponding to filter B. For example, the power coding combination mapped to transmittance coding combination b is S2. If the power coding combination of the optical signal transmitted by the optical fiber received by an optical network unit M2 is S2, the branch link port connected to the optical network unit M2 on the optical splitter can be determined to be optical link output port 2.

[0084] In this embodiment, at least M-1 optical link output ports among the M optical link output ports are configured with filters, wherein the filters configured for each optical link output port have different transmittance coding combinations for optical signals, so that when the optical signal incident to the splitter is split to each optical link output port, the filters configured by each optical link output port have different energy filtering ratios (or transmittance ratios) for specific wavelengths, or there is energy filtering for different wavelengths (the filtering ratios corresponding to energy filtering for different wavelengths may be the same or different), so that the optical signals transmitted from each optical link output port have different power coding combinations, and then the branch link port information to which the specified optical network unit is connected on the splitter can be accurately identified based on the power coding combinations of the optical signals transmitted from the optical fibers of different branch ports.

[0085] In one implementation, the optical splitter of the embodiment of the present application may be an optical splitter including N levels, wherein N may be one or an integer greater than or equal to two, and is not specifically limited in this embodiment. It should be noted that the transmittance coding combination configured for the optical signal corresponding to any optical link output port of the same level optical splitter is different. And when N is an integer greater than or equal to two, the transmittance coding combination configured for the optical signal corresponding to any optical link output port of the K-th level optical splitter is different from the transmittance coding combination configured for the optical signal corresponding to any optical link output port of the H-th level optical splitter, H and K are both positive integers, wherein the K-th level optical splitter and the H-th level optical splitter are any two levels in the N-level optical splitter. In this way, the embodiment of the present application can determine which optical link output port in which level of splitter the optical network terminal is connected to based on the power coding combination of the optical signal transmitted from the optical fiber of different branch ports, thereby accurately identifying the branch link port information to which the specified optical network unit is connected on the splitter, thereby solving the problem of link information identification connected to the ONU in the PON network passive ODN network, and can be used for dynamic visual management of ODN resources.

[0086] The present application proposes an optical network system including an optical distribution network and an optical network unit (ONU). The optical distribution network includes filters and N-level optical splitters, where N is a positive integer. Each level of the N-level optical splitters includes at least one optical splitter. The optical splitter includes M optical link output ports, at least M-1 of the M optical link output ports are correspondingly configured with different filters, and each optical link output port is connected to an ONU. M is an integer greater than one. Different filters have different transmittance coding combinations for optical signals. The transmittance coding combination is a coding combination formed by the transmittance ratio for different wavelengths within the passband range of the filter in the ONU. Therefore, the embodiments of the present application utilize the passband sideband effect of the filter to combine branch ports with different reflectances at the optical network unit (ONU) end and the optical distributed network (ODN) end, forming different power change relationships (i.e., power coding combinations) for different branch ports. This facilitates accurate identification of the branch link port information to which a specified optical network unit is connected on the splitter based on the received different power change relationships.

[0087] Compared with the port identification scheme for the optical splitter in the related art, the embodiment of the present application can continue to use the hardware structure of the optical splitter and ONU in the original optical network system, without the need to design and adopt remote pump amplification technology on the splitter side, and without changing the original ONU structure design to add a receiver that can receive non-service wavelength signals, thereby achieving accurate identification of the port of the optical splitter connected to the ONU while reducing the cost of ODN.

[0088] In one practicable manner, the optical network system further includes an optical line terminal; the optical line terminal is configured to: receive the power coding combination from the ONU; and determine, based on the power coding combination, an optical link output port of the optical splitter to which the ONU is connected.

[0089] Specifically, the optical line terminal may determine the first link port information of the power coding combination mapping based on the first preset mapping relationship, and determine the optical link output port of the optical splitter connected to the ONU according to the first link port information.

[0090] In this embodiment, the first preset mapping relationship includes a one-to-one mapping relationship between each power coding combination and the first link port information. Different power coding combinations are mapped to different first link port information. It is understood that the first preset mapping relationship can be pre-stored in the system of the electronic device that serves as the execution subject of the embodiment of the present application.

[0091] This embodiment determines the first link port information of the power coding combination mapping based on the first preset mapping relationship, and accurately determines the optical link output port of the optical splitter to which the ONU is connected according to the first link port information.

[0092] In one possible embodiment, the passband range includes the operating band of the service light and the sideband bands distributed on both sides of the operating band, and the transmittance coding combination is a coding combination formed by the transmittance ratio of different sideband wavelengths in the sideband band, wherein the filter is fully transparent for the operating wavelengths in the operating band.

[0093] In one implementation, the ONU is configured to respectively determine power coding combinations of optical signals from the optical distribution network, wherein the power coding combination is a coding combination formed by power ratios of different sideband wavelengths within the sideband band, and the transmittance coding combination is mapped one-to-one to the power coding combination;

[0094] The power coding combination is used to determine the optical link output port of the optical splitter to which the ONU is connected.

[0095] In this embodiment, the operating wavelength band of the service light refers to the wavelength range corresponding to the operating wavelength of the service light. Specifically, it can be based on the operating wavelength and fluctuate around a first preset wavelength. Due to the filter coating transition band and design redundancy of the filter in the optical network unit (ONU), the passband range of the filter, in addition to covering the operating wavelength, reserves additional wavelength bands above and below the operating wavelength. Specifically, it can be based on the operating wavelength and fluctuate around a second preset wavelength. This second preset wavelength range (i.e., the reserved wavelength band) is the sideband band. The sideband band refers to the wavelength range within the passband range of the filter other than the operating wavelength, and the sideband bands are located on both sides of the operating wavelength. To facilitate understanding, two examples are given. In one example, the filter in the optical network unit (ONU) not only provides 100% transmission of the operating wavelength λ±10nm of the OLT's TX (transmitter) transmitter (in this case, 10nm is the first preset wavelength), but also, due to the filter coating transition band and design redundancy, 100% transmission of the entire filter band of λ±14nm. In this case, the operating wavelength band is [λ-10nm, λ+10nm], and the sideband bands are [λ-14nm, λ-10nm) and (λ+10nm, λ+14nm]. Those skilled in the art will appreciate that wavelengths within the sideband band are optical energy without digital signals and are simply zero-level signals, without modulation signals.

[0096] In another example, the filter in the optical network unit ONU can not only transmit the operating wavelength λ±10nm of the OLT's TX (Transmitter) transmitting end 100% (in this case, 10nm is the first preset wavelength), but also transmit the entire filter band λ±16nm 100% due to the filter coating transition band and design redundancy. At this time, the working band is [λ-10nm, λ+10nm], and the sideband band is [λ-16nm, λ-10nm), and (λ+10nm, λ+16nm]. It should be noted that the many details shown in the above two examples are only used to understand the embodiments of the present application and do not constitute a limitation on the embodiments of the present application. It is known to those skilled in the art that the wavelength within the sideband band is light energy without digital signals, only a 0-level signal, and no modulation signal. At this time, the BOSA (bi-directional optical sub-assembly, optical transmitting and receiving component) of each ONU not only receives the downlink service optical signal within the working band sent by the OLT (optical line terminal), but also receives the WDM (Wavelength Division Optical signals within the sideband band transmitted by a wavelength division multiplexing (WDM) laser or tunable laser are filtered for specific wavelengths within the sideband band according to filters configured at each optical link output port. (Since wavelengths within the sideband band do not carry digital signals, or in other words, do not carry service information, filtering of wavelengths within the sideband band does not affect the signal quality of the entire service optical signal.) Each optical link output port is configured with a different filter, and different filters form different coding combinations for the transmittance ratios of sideband wavelengths within the sideband band. As a result, the optical signals transmitted from each optical link output port have different power coding combinations. The power coding combination is a coding combination formed by the power ratios of different sideband wavelengths within the sideband band. Furthermore, based on the power coding combinations of optical signals transmitted from the optical fibers of different branch ports, the branch link port information to which a specified optical network unit is connected on the optical splitter can be accurately identified.

[0097] It is worth mentioning that the embodiments of the present application provide a method for causing fluctuations in the downstream received power on the ONU side by utilizing the passband sideband effect of the ONU-side receiving filter. This method does not require the deployment of expensive optical amplification equipment or changes to the ONU design. Compared to the port identification scheme for optical splitters in related technologies, the embodiments of the present application can continue to use the hardware structure of the optical splitter and ONU in the original optical network system, eliminating the need to design remote pump amplification technology on the optical splitter side and the need to change the original ONU structure design to add a receiver that can receive non-service wavelength signals. This achieves accurate identification of the port of the optical splitter connected to the ONU while reducing the cost of the ODN.

[0098] In this embodiment, different ONUs are connected to different ODN branch ports, each designed with different wavelength and reflectivity or transmittance coding combinations. When transmitting an optical signal at a different wavelength, the ONU's BOSA receives different optical signal powers. These different powers correspond to the port's reflectivity or transmittance design. Therefore, the combined transmitted wavelength and the power received by the ONU's BOSA can be mapped to the port's preset wavelength and reflectivity or transmittance coding, thereby locating the optical link output port of the optical link splitter to which the ONU is connected.

[0099] In one embodiment, the optical network system further includes a tunable wavelength laser, and the optical line terminal is further used to: receive the power coding combination from the ONU; perform a difference between the power coding combination and the power belonging to the same sideband wavelength in the target coding combination to obtain a difference coding combination, wherein the target coding combination is a coding combination formed by the power ratio of different sideband wavelengths in the sideband band in the optical signal emitted by the tunable wavelength laser to the optical link input port of the optical splitter; based on a second preset mapping relationship, determine the second link port information mapped by the difference coding combination, and determine the optical link output port of the optical splitter connected to the ONU according to the second link port information.

[0100] Among them, the target coding combination is a coding combination formed by the power ratio of different sideband wavelengths in the sideband band in the optical signal input to the optical link input port of the optical splitter. The target coding combination is the coding combination formed by the power ratio of different sideband wavelengths in the sideband band of the input optical signal, wherein the input optical signal is the optical signal input to the filter configured at the output port of the optical link. It can be understood that the difference coding combination is the coding combination obtained by taking the difference between the power of the input optical signal and the output optical signal for the same sideband wavelength. Among them, the output optical signal is the optical signal output from the filter configured at the output port of the optical link. It is easy to understand that the difference coding combination can be used to characterize the filtering properties of the filter for filtering a specific wavelength, for example, it can be specifically characterized as the energy filtering ratio (or transmittance) of the filter for each wavelength in the sideband band.

[0101] In this embodiment, the second preset mapping relationship includes a one-to-one mapping relationship between each difference code combination and the second link port information. Different difference code combinations map to different second link port information. It is understood that the second preset mapping relationship may be pre-stored in the system of the electronic device that serves as the execution subject of the embodiment of this application.

[0102] This embodiment determines the second link port information of the difference coding combination mapping based on the second preset mapping relationship, and accurately locates the optical link output port of the optical splitter to which the ONU is connected according to the second link port information.

[0103] In another embodiment, the optical line terminal is further used to: receive the power coding combination from the ONU; obtain the power of the target sideband wavelength in the power coding combination, and determine the third link port information of the power mapping of the target sideband wavelength based on a third preset mapping relationship; and determine the optical link output port of the splitter connected to the ONU according to the third link port information.

[0104] In this embodiment, the third preset mapping relationship includes a one-to-one mapping relationship between each power of the target sideband wavelength and the third link port information. Different power levels of the target sideband wavelength are mapped to different third link port information. It is understood that the third preset mapping relationship may be pre-stored in the system of the electronic device that serves as the execution subject of the embodiment of this application.

[0105] In this embodiment, it should be noted that different optical link output ports have different transmittances for the target sideband wavelength. Specifically, the filters configured for different optical link output ports have different filtering ratios for the target sideband wavelength, resulting in different powers of the target sideband wavelength transmitted from each optical link output port. This allows the power of the target sideband wavelength in the power coding combination to be obtained, and based on the third preset mapping relationship, the branch link port information to which the specified optical network unit is connected on the optical splitter can be accurately identified.

[0106] In yet another embodiment, the optical network system further includes a tunable wavelength laser, and the optical line terminal is further configured to:

[0107] Receive the power coding combination from the ONU; obtain the power of the target sideband wavelength in the power coding combination, and calculate the power difference between the power of the target sideband wavelength and the target power, wherein the target power is the power of the target sideband wavelength in the optical signal emitted by the tunable wavelength laser to the optical link input port of the optical splitter; based on a fourth preset mapping relationship, determine the fourth link port information of the power difference mapping, and determine the optical link output port of the optical splitter connected to the ONU according to the fourth link port information.

[0108] It should be noted that different optical link output ports have different transmittances for the target sideband wavelength. Specifically, the filters configured for different optical link output ports have different filtering ratios for the target sideband wavelength, so that the power of the target sideband wavelength transmitted from each optical link output port is different.

[0109] In this embodiment, the target power is the power of the target sideband wavelength in the optical signal input to the optical link input port of the optical splitter. The target power is also the power of the target sideband wavelength of the input optical signal, wherein the input optical signal is the optical signal input to the filter configured by the optical link output port. The power difference is the power value obtained by taking the difference between the power of the input optical signal and the output optical signal for the target sideband wavelength. The output optical signal is the optical signal output from the filter configured by the optical link output port. It is easy to understand that the power difference can be used to characterize the filtering properties of the filter for filtering the target sideband wavelength, for example, it can be specifically characterized as the energy filtering ratio (or transmittance) of the filter for the target sideband wavelength.

[0110] In this embodiment, the fourth preset mapping relationship includes a one-to-one mapping relationship between each power difference value and the fourth link port information. Different power differences are mapped to different fourth link port information. It is understood that the fourth preset mapping relationship can be pre-stored in the system of the electronic device that serves as the execution subject of the embodiment of the present application.

[0111] The embodiment of the present application obtains the power of the target sideband wavelength in the power coding combination, calculates the power difference between the power of the target sideband wavelength and the target power, and determines the fourth link port information mapped to the power difference based on the fourth preset mapping relationship, and then accurately determines the optical link output port of the optical splitter connected to the ONU based on the fourth link port information.

[0112] In order to help understand the technical principles or technical concepts of the embodiments of the present application, a specific embodiment 3 is listed with reference to FIG5 , in which:

[0113] (1) Implementation method 1 includes:

[0114] As shown in Figure 5, two independent WDM lasers are used. Both emit optical energy without digital signals, representing a zero-level signal, without modulation. The operating wavelengths λ1 and λ2 of the two WDM lasers have an accuracy of ±0.2nm. The GPON (Gigabit-capable passive optical networks) OLT TX transmitter operates at a wavelength of 1490±10nm, and the XGS (X-gigabit-capable passive optical networks) PON TX operates at a wavelength of 1575-1581nm. λ1 is within the extended receive passband of the GPON (Gigabit-capable passive optical networks) ONU. The GPON ONU BOSA receives the λ1 optical signal with an insertion loss of less than 0.3dB (7%), and the wavelengths are 1473nm≤λ1≤1480nm or 1500nm≤λ1≤1507nm. The XGS PON ONU BOSA receives λ2 optical signals with an insertion loss of less than 0.3dB (7%), and the wavelengths are 1571nm≤λ2≤1575nm or 1581nm≤λ2&λ4≤1588nm. The ODN uses splitters with equal or unequal splitting ratios (splitters can be 1:2, 1:4, or 1:8), which can be cascaded. Each splitter is designed with a GPON (Gigabit Passive Optical Network) ONU or XGS PON ONU wavelength filter structure, and at least one splitter branch has energy filtering or transmittance design for the λ1&λ2 wavelengths. Finally, when the GPON OLT TX end is working and transmitting 1490±10nm service optical signals, and the WDM laser is not turned on, each ODN end branch transmits 100% of the service wavelength signal and is received by each branch GPON ONU. Each GPON ONU responds to this received optical signal energy as P0 and records it in the ONU's MCU (Microcontroller Unit) address table.

[0115] When the WDM laser transmits the λ1 and λ2 wavelength signals respectively, the GPON ONU BOSA on each output branch fiber has a 100% transmittance for this wavelength. Since each branch fiber has a different transmittance for a specific wavelength, the response gain at each ONU is also different. In this state, the response power of each GPON ONU is P1, which is recorded in a separate address on the ONU's MCU. Ultimately, by uploading the △P-GPONi change and encoding method to the OLT, the system can identify the optical link status of the GPON ONU attached to each fiber. Similarly, by uploading the △XGSPON (passive optical network)i of the power gain change generated by the λ2 wavelength optical signal on the XGSP-PON ONU BOSA and the encoding method to the OLT, the system can identify the optical link status of the GPON ONU attached to each fiber. The two independent lasers can also be tunable lasers.

[0116] (2) Implementation method 2 includes:

[0117] As shown in Figure 5, eight independent WDM lasers are first used. Each of them emits optical energy without digital signals, only zero-level signals, and no modulation. The operating wavelengths λ1 to λ8 of the eight WDM lasers have an accuracy of ±0.2nm. The operating wavelength of the GPON OLT TX transmitter is 1490±10nm, and the wavelength of the XGS PON TX end is 1575~1581nm.

[0118] Among them, λ1, λ2, λ5, and λ6 are all within the extended receive passband of the terminal GPON ONU. The GPON ONU BOSA receives optical signals with an insertion loss of less than 0.3dB (7%) for λ1, λ2, λ5, and λ6, and the wavelengths 1473nm ≤ λ1, λ2, λ5, and λ6 ≤ 1480nm or 1500nm ≤ λ1, λ2, λ5, and λ6 ≤ 1507nm. The XGS PON ONU BOSA receives optical signals with an insertion loss of less than 0.3dB (7%) for λ3, λ4, λ7, and λ8, and the wavelengths 1571nm ≤ λ3, λ4, λ7, and λ8 ≤ 1575nm or 1581nm ≤ λ3, λ4, λ7, and λ8 ≤ 1588nm. Secondly, the ODN end uses an optical splitter with equal or unequal splitting ratio (the optical splitter can be 1:2, 1:4 or 1:8), and can appear in cascade form. Each splitter is equipped with a GPON ONU or XGS PON ONU wavelength filter structure design, and at least one splitter branch has the function of filtering or transmittance design for the wavelength energy of λ1 to λ8. Finally, when the GPON OLT TX end is working and transmitting a 1490±10nm service optical signal, and the WDM laser is not turned on, each ODN end branch transmits 100% of the service wavelength signal and is received by each branch GPON ONU. Each GPON ONU responds to this received optical signal energy as P0 and records it in the ONU's MCU address table.

[0119] When the WDM laser transmits wavelength signals at λ1, λ2, λ5, and λ6, the GPON ONU BOSA on each branch fiber has a 100% transmittance for these wavelengths. Since each branch fiber has different transmittances for a specific wavelength, the response gain at each ONU is also different. In this state, the response power of each GPON ONU is P1, which is recorded in a different address on the ONU's MCU. Ultimately, this information is uploaded to the OLT through changes in △P-GPONi and encoding. This allows the system to identify the optical link status of the GPON ONU attached to each fiber.

[0120] Similarly, the power gain change ΔP-XGSPONi generated by the λ3, λ4, λ7, and λ8 wavelength optical signals on the XGS PON ONU BOSA (Optical Transmitter and Receiver Assembly) is transmitted to the OLT along with the encoding method. This allows the system to identify the optical link status of the GPON ONU attached to each fiber. The eight independent lasers can also be tunable.

[0121] It should be noted that the above-mentioned specific embodiment three is only used to help understand the technical principles or technical concepts of the embodiments of this application, and does not constitute a limitation of this application. More simple transformations based on this technical concept should all be within the scope of protection of this application.

[0122] In addition, an embodiment of the present application further provides an electronic device, please refer to Figure 6, which is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application. As shown in Figure 6, the electronic device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and in one implementation, the user interface 1003 may also include a standard wired interface and a wireless interface. In one implementation, the network interface 1004 may include a standard wired interface and a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk storage. In one implementation, the memory 1005 may also be a storage device independent of the aforementioned processor 1001 .

[0123] Those skilled in the art will appreciate that the structure shown in FIG6 does not limit the electronic device and may include more or fewer components than shown, or combine certain components, or arrange the components differently. As shown in FIG6 , the memory 1005 as a readable storage medium may include an operating system, a data storage module, a network communication module, a user interface module, and a port identification program for the optical splitter.

[0124] In the electronic device shown in Figure 6, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in this embodiment can be set in the communication device, and the communication device calls the port identification program of the splitter stored in the memory 1005 through the processor 1001, and executes the port identification method applied to the splitter provided in any of the above embodiments.

[0125] The terminal proposed in this embodiment and the port identification method applied to the splitter proposed in the above embodiment belong to the same inventive concept. The technical details not fully described in this embodiment can be referred to any of the above embodiments, and this embodiment has the same beneficial effects as the port identification method of executing the splitter.

[0126] In addition, an embodiment of the present application also proposes a computer-readable storage medium, which can be a non-volatile computer-readable storage medium. The computer-readable storage medium stores a port identification program for the optical splitter. When the port identification program for the optical splitter is executed by the processor, the port identification method for the optical splitter of the present application as described above is implemented.

[0127] The various embodiments of the electronic device and the computer-readable storage medium of the present application may refer to the various embodiments of the port identification method of the optical splitter of the present application, and will not be repeated here.

[0128] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0129] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0130] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling an electronic device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0131] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for identifying a port of an optical splitter, wherein: The optical splitter includes M optical link output ports, each optical link output port has a different transmittance coding combination configured corresponding to the optical signal, wherein M is an integer greater than one, including: Acquire an optical signal from an optical distribution network, and determine a power coding combination of the optical signal, wherein the power coding combination is a coding combination formed by power ratios for different wavelengths within a passband range of a filter in an optical network unit (ONU). The transmittance coding combination is mapped one-to-one with the power coding combination, and the transmittance coding combination is a coding combination formed by the transmittance ratios of different wavelengths within the passband range of the filter in the ONU; An optical link output port of the optical splitter to which the ONU is connected is determined according to the power coding combination.

2. The method for identifying a port of an optical splitter according to claim 1, wherein: At least M-1 optical link output ports among the M optical link output ports are correspondingly configured with filters, and the filters configured for the respective optical link output ports have different transmittance coding combinations for optical signals.

3. The method for identifying a port of an optical splitter according to claim 1, wherein: The passband range includes the working band of the service light and the sideband bands distributed on both sides of the working band. The transmittance coding combination is a coding combination formed by the transmittance ratios of different sideband wavelengths in the sideband band. The power coding combination is a coding combination formed by the power ratios of different sideband wavelengths in the sideband band.

4. The method for identifying a port of an optical splitter according to claim 3, wherein: The step of determining the optical link output port of the optical splitter connected to the ONU according to the power coding combination comprises: Based on a first preset mapping relationship, first link port information of the power coding combination mapping is determined, and according to the first link port information, an optical link output port of the optical splitter connected to the ONU is determined.

5. The method for identifying a port of an optical splitter according to claim 3, wherein: The step of determining the optical link output port of the optical splitter connected to the ONU according to the power coding combination comprises: The power coding combination and the power belonging to the same sideband wavelength in the target coding combination are respectively subtracted to obtain a difference coding combination, wherein the target coding combination is a coding combination formed by the power ratio of different sideband wavelengths in the sideband band in the optical signal input to the optical link input port of the optical splitter; Based on a second preset mapping relationship, second link port information of the difference coding combination mapping is determined, and according to the second link port information, an optical link output port of the optical splitter connected to the ONU is determined.

6. The method for identifying a port of an optical splitter according to claim 3, wherein: The step of determining the optical link output port of the optical splitter connected to the ONU according to the power coding combination comprises: Acquire the power of the target sideband wavelength in the power coding combination, and determine the third link port information of the power mapping of the target sideband wavelength based on a third preset mapping relationship; An optical link output port of the optical splitter to which the ONU is connected is determined according to the third link port information.

7. The method for identifying a port of an optical splitter according to claim 3, wherein: The step of determining the optical link output port of the optical splitter connected to the ONU according to the power coding combination comprises: Acquire the power of the target sideband wavelength in the power coding combination, and calculate the power difference between the power of the target sideband wavelength and the target power, wherein the target power is the power of the target sideband wavelength in the optical signal input to the optical link input port of the optical splitter; Based on a fourth preset mapping relationship, fourth link port information of the power difference mapping is determined, and according to the fourth link port information, an optical link output port of the optical splitter connected to the ONU is determined.

8. An optical network system, wherein: It includes an optical distribution network and an optical network unit ONU, wherein the optical distribution network includes a filter and N-level optical splitters, where N is a positive integer; Each level of the N-level optical splitter includes at least one optical splitter, and the optical splitter includes M optical link output ports, at least M-1 optical link output ports among the M optical link output ports are correspondingly configured with different filters, and each optical link output port is correspondingly connected to one ONU, wherein M is an integer greater than one; Among them, different filters have different transmittance coding combinations for optical signals, and the transmittance coding combination is a coding combination formed by transmittance ratios for different wavelengths within the passband range of the filter in the ONU.

9. The optical network system according to claim 8, wherein: The passband range includes the working band of the service light and the sideband bands distributed on both sides of the working band. The transmittance coding combination is a coding combination formed by the transmittance ratio of different sideband wavelengths in the sideband band, wherein the filter is fully transmittive for the working wavelengths in the working band.

10. The optical network system according to claim 9, wherein: The ONU is used to respectively determine the power coding combination of the optical signal from the optical distribution network, wherein the power coding combination is a coding combination formed by the power ratio of different sideband wavelengths in the sideband band, and the transmittance coding combination is mapped one-to-one with the power coding combination; wherein the power coding combination is used to determine the optical link output port of the splitter to which the ONU is connected.

11. The optical network system according to claim 10, wherein: The optical network system also includes an optical line terminal; The optical line terminal is used for: receiving the power coding combination from the ONU; An optical link output port of the optical splitter to which the ONU is connected is determined according to the power coding combination.

12. The optical network system according to claim 11, wherein: The optical network system further comprises a tunable wavelength laser, and the optical line terminal is further used for: receiving the power coding combination from the ONU; The power coding combination and the power belonging to the same sideband wavelength in the target coding combination are respectively subtracted to obtain a difference coding combination, wherein the target coding combination is a coding combination formed by the power ratio of different sideband wavelengths in the sideband band in the optical signal emitted from the tunable wavelength laser to the optical link input port of the optical splitter; Based on a second preset mapping relationship, second link port information of the difference coding combination mapping is determined, and according to the second link port information, an optical link output port of the optical splitter connected to the ONU is determined.

13. The optical network system according to claim 11, wherein: The optical line terminal is further used for: receiving the power coding combination from the ONU; Acquire the power of the target sideband wavelength in the power coding combination, and determine the third link port information of the power mapping of the target sideband wavelength based on a third preset mapping relationship; An optical link output port of the optical splitter to which the ONU is connected is determined according to the third link port information.

14. The optical network system according to claim 11, wherein: The optical network system further comprises a tunable wavelength laser, and the optical line terminal is further used for: receiving the power coding combination from the ONU; Acquire the power of the target sideband wavelength in the power coding combination, and calculate the power difference between the power of the target sideband wavelength and the target power, wherein the target power is the power of the target sideband wavelength in the optical signal emitted by the tunable wavelength laser to the optical link input port of the optical splitter; Based on a fourth preset mapping relationship, fourth link port information of the power difference mapping is determined, and according to the fourth link port information, an optical link output port of the optical splitter connected to the ONU is determined.

15. An electronic device, wherein: include: A memory, a processor, and a port identification program for an optical splitter stored in the memory and executable on the processor, wherein the port identification program for the optical splitter implements the port identification method for the optical splitter according to any one of claims 1 to 7 when executed by the processor.

16. A computer-readable storage medium, wherein: The computer-readable storage medium stores a port identification program for an optical splitter, and when the port identification program for an optical splitter is executed by a processor, the port identification method for an optical splitter according to any one of claims 1 to 7 is implemented.

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