Optical network terminal detection device, optical network terminal detection method and optical network terminal detection system

Abstract

The invention discloses an optical network terminal detection device, an optical network terminal detection method and an optical network terminal detection system, and belongs to the technical field of communication. The detection device comprises a light splitting module, a management module and a detection module. The light splitting module is used for splitting light signals sent by the optical network terminal to obtain first light signals and second light signals; the management module is used for acquiring an identifier of an optical network terminal corresponding to the first optical signal; the detection module is used for detecting the second optical signal to obtain type information indicating the type of the optical network terminal; and the management module is also used for generating a detection result of the optical network terminal, wherein the detection result comprises an identifier and a type of the optical network terminal. According to the method, the identifier and the type information are determined according to the two parts of optical signals obtained by dividing the same optical signal, and the type of the optical network terminal corresponding to the identifier is accurately and efficiently determined.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a detection device, method and system for optical network terminals. Background Technology

[0002] Passive optical network (PON) is a fixed broadband access technology used to connect network backbones and end users. With the development of PON technology, different generations of PON technologies have emerged, such as gigabit passive optical network (GPON), 10G GPON, Ethernet passive optical network (EPON), and 10G EPON. The implementation of each generation of PON technology must consider compatibility with the previous generation, or even two generations prior, to protect network investment and promote smooth network evolution.

[0003] 50G PON is a new generation of PON technology defined by international standards. The deployment of 50G PON must consider the coexistence and evolution with EPON, 10GEPON, GPON, and 10G GPON. In PON, the signals emitted by 50G PON optical network terminals need to be wavelength divided multiplexed with the signals emitted by EPON and 10G EPON optical network terminals. That is, the wavelength range of the signals emitted by 50G PON optical network terminals needs to be different from the wavelength range of the signals emitted by EPON and 10G EPON optical network terminals to achieve coexistence and evolution.

[0004] The EPON optical network terminal and the 10G EPON optical network terminal include a first type of optical network terminal and a second type of optical network terminal. The wavelength range of the signal emitted by the first type of optical network terminal is different from that of the signal emitted by the 50G PON optical network terminal. Therefore, the signal emitted by the first type of optical network terminal can achieve wavelength division multiplexing (WDM) with the signal emitted by the 50G PON optical network terminal. However, the wavelength range of the signal emitted by the second type of optical network terminal may overlap with that of the 50G PON optical network terminal, making it impossible to reliably achieve WDM coexistence between the two.

[0005] Therefore, accurately detecting the type of optical network terminal and processing different types of optical network terminals according to evolution requirements to achieve smooth network evolution has become an urgent problem to be solved. Summary of the Invention

[0006] This application provides a detection device, a detection method, and a system for optical network terminals, so as to accurately and efficiently determine the type of optical network terminal. The technical solution is as follows.

[0007] In a first aspect, a detection device for an optical network terminal is provided. The detection device includes a beam splitting module, a management module, and a detection module. The beam splitting module is used to split the optical signal emitted by the optical network terminal to obtain a first optical signal and a second optical signal. The management module is used to obtain the identifier of the optical network terminal corresponding to the first optical signal. The detection module is used to detect the second optical signal and obtain type information, which indicates the type of the optical network terminal. The management module is also used to obtain the detection result of the optical network terminal, which includes the identifier and type of the optical network terminal.

[0008] In this application, a portion of the optical signal emitted by the optical network terminal is transmitted to the management module, enabling the management module to obtain the identifier of the optical network terminal that emitted this portion of the optical signal. Another portion of the optical signal emitted by the optical network terminal is transmitted to the detection module, enabling the detection module to detect the type information to indicate the type of the optical network terminal. The management module obtains the detection result based on the identifier and type information determined from the two portions of the optical signal, that is, accurately and efficiently determines the type of the optical network terminal corresponding to the identifier.

[0009] In one possible implementation, the detection module includes a partitioning unit and a determination unit. The partitioning unit is used to perform spectral partitioning on the second optical signal to obtain multiple sub-signals, each sub-signal having a different spectral range. The determination unit is used to determine the type information corresponding to the multiple sub-signals. Since the multiple sub-signals emitted by different types of optical network terminals are different, the type information can be accurately determined based on the multiple sub-signals.

[0010] In one possible implementation, the type of each optical network terminal to be detected includes a first type; if the number of sub-signals with an intensity greater than or equal to an intensity threshold is less than a first quantity threshold, the type information indicates that the type of the optical network terminal is the first type. In this application, the first type can be a narrowband type. The effective spectrum of the signal emitted by the optical network terminal of the narrowband type is narrow or the effective spectrum is concentrated. For example, the optical network terminal of the first type can be an optical network terminal using a distributed feed-back (DFB) laser. The effective spectrum of the signal emitted by the optical network terminal of the first type is less than 3 nanometers (nm). Since the intensity of the sub-signals corresponding to the effective spectrum is relatively large, the number of sub-signals with large intensity in the signal emitted by the optical network terminal of the first type is relatively small. Therefore, in this application, if the number of sub-signals with an intensity greater than or equal to the intensity threshold is less than the set first quantity threshold, and multiple sub-signals meet the characteristics of the sub-signals of the optical network terminal of the first type, the type information indicating that the type of the optical network terminal is the first type can be accurately determined.

[0011] In one possible implementation, if the number of sub-signals with an intensity greater than or equal to an intensity threshold is less than a first quantity threshold, and the spectrum of the sub-signals with an intensity greater than or equal to the intensity threshold belongs to a first type of wavelength range, the type information indicates that the optical network terminal is of type 1. The wavelength range of signals emitted by a type 1 optical network terminal is typically distributed within a certain range, such as 1260–1280 nm or 1290–1330 nm. Therefore, if the spectrum of a sub-signal with an intensity greater than or equal to the intensity threshold is detected to belong to a first type of wavelength range, and the number of sub-signals with an intensity greater than or equal to the intensity threshold is less than the first quantity threshold, the type information indicating that the optical network terminal is of type 1 can be determined more accurately.

[0012] In one possible implementation, the type includes a second type; when the number of sub-signals with an intensity greater than or equal to an intensity threshold is greater than or equal to a first quantity threshold, the type information indicates that the optical network terminal is of the second type. In this application, the second type can be a broadband type. A broadband optical network terminal emits a signal with a wider effective spectrum or a more dispersed effective spectrum. For example, a second-type optical network terminal can be an optical network terminal using a Fabry-Perot (FP) laser. The effective spectral width of the signal emitted by a second-type optical network terminal is typically greater than a certain width (e.g., greater than 10 nm). Since the intensity of the sub-signals corresponding to the effective spectrum is relatively large, the number of high-intensity sub-signals in the signal emitted by a second-type optical network terminal is relatively large. Therefore, in this application, if the number of sub-signals with an intensity greater than or equal to an intensity threshold is greater than or equal to a set first quantity threshold, and multiple sub-signals conform to the characteristics of sub-signals of a second-type optical network terminal, the type information can accurately determine that the optical network terminal is of the second type.

[0013] In one possible implementation, if the spectrum of a sub-signal with an intensity greater than or equal to an intensity threshold belongs to a second-type wavelength range, the type information indicates that the optical network terminal is of type two. The signals emitted by type two optical network terminals have a wider spectral distribution, for example, between 1260 and 1360 nm. However, 1280–1290 nm and 1330–1360 nm are wavelength ranges where signals from type one optical network terminals do not fall. Therefore, the second-type wavelength range can be set to 1280–1290 nm and 1330–1360 nm. If a sub-signal with an intensity greater than or equal to the intensity threshold is detected and its spectrum belongs to the second-type wavelength range, then regardless of the number of sub-signals with an intensity greater than or equal to the intensity threshold, the type information can be used to determine that the optical network terminal is of type two.

[0014] In one possible implementation, the determining unit is further configured to generate multiple electrical signals based on multiple sub-signals, wherein a sub-signal with an intensity greater than or equal to an intensity threshold is a sub-signal whose amplitude is greater than or equal to an amplitude threshold. In this application, multiple sub-signals are converted into multiple electrical signals, and the amplitude of different electrical signals indicates the intensity of different sub-signals. This method is relatively universal and can accurately determine the type information.

[0015] In one possible implementation, the type information includes the amplitudes of multiple electrical signals or the type of the optical network terminal. If the type information includes the amplitudes of multiple electrical signals, the management module can determine the type of the optical network terminal based on the amplitudes of these signals, reducing the power consumption of the detection module and improving its utilization. Furthermore, if the type information includes the type of the optical network terminal, the management module can quickly obtain the type of the optical network terminal upon receiving the type information, further improving the efficiency of the management module in obtaining detection results that include the type of the optical network terminal.

[0016] In one possible implementation, the partitioning unit includes multiple filters, each allowing signals with different spectra to pass through. A first filter among the multiple filters is used to filter the second optical signal, obtaining a sub-signal from among multiple sub-signals that corresponds to the spectrum of the signal allowed by the first filter. The first filter can be any one of the multiple filters. By using multiple filters with different allowed signal spectra, the second optical signal can be accurately divided into multiple spectrally different sub-signals.

[0017] In one possible implementation, multiple filters allow signals with the same spectral width; or, multiple filters allow signals with different spectral widths; or, multiple filters corresponding to a first type of wavelength range allow signals with the same spectral width, and the spectral widths of signals allowed by multiple filters corresponding to the first type of wavelength range differ from the spectral widths of signals allowed by filters corresponding to a second type of wavelength range. The spectral width of the signals allowed by the filters indicates the spectral width and granularity of different sub-signals. In this application, the spectral width of the signals allowed by multiple filters can be adjusted to achieve signal division at multiple granularities, providing greater flexibility and enabling precise detection according to detection requirements.

[0018] In one possible implementation, the spectral width of the signals allowed to pass through multiple filters corresponding to the first type of wavelength range is less than a first width threshold. Since the spectra of signals emitted by both the first type of optical network terminal and the second type of optical network terminal may be distributed within the first type of wavelength range, fine-grained segmentation of the optical signals within this range is necessary. That is, the spectral width of the signals allowed to pass through multiple filters corresponding to the first type of wavelength range needs to be set to a value less than the first width threshold. This ensures that the segmentation results of sub-signals within the first type of wavelength range corresponding to different types of optical network terminals are different, so as to accurately determine the type of optical network terminal based on the segmented sub-signals.

[0019] In one possible implementation, the partitioning unit includes a diffraction grating or an arrayed waveguide grating. Both diffraction gratings and arrayed waveguide gratings can accurately partition the second optical signal into multiple sub-signals with different spectra, thereby enabling accurate detection of the optical network terminal based on these multiple sub-signals.

[0020] In one possible implementation, the management module has a first interface deployed on it, through which it connects to the detection module. The detection module is also used to transmit type information to the management module via the first interface. The management module is used to obtain detection results including the type and identifier of the optical network terminal. The first interface deployed on the management module enables communication between the management module and the detection module, allowing the management module to receive the type information of the optical network terminal transmitted by the detection module. Since the identifier and type of the optical network terminal are determined based on the same optical signal, the type and identifier of the optical network terminal in the detection result both correspond to the same optical network terminal, thus accurately determining the type of the optical network terminal corresponding to the identifier.

[0021] In one possible implementation, the first type of wavelength range is either between 1260 and 1280 nanometers or between 1290 and 1330 nanometers, and the second type of wavelength range is either between 1280 and 1290 nanometers or between 1330 and 1360 nanometers. The first type of wavelength range is the intersection of the wavelength ranges of signals emitted by optical network terminals using DFB lasers and optical network terminals using FP lasers. The second type of wavelength range is another possible wavelength range of signals emitted by optical network terminals using FP lasers. By determining whether the wavelength range of the spectrum of a sub-signal with an intensity greater than or equal to an intensity threshold belongs to the first or second type of wavelength range, it is possible to determine whether the optical network terminal uses a DFB laser or an FP laser, thus accurately determining the type of optical network terminal.

[0022] Secondly, a method for detecting an optical network terminal is provided. The method includes: splitting an optical signal emitted by the optical network terminal to obtain a first optical signal and a second optical signal; obtaining an identifier of the optical network terminal corresponding to the first optical signal; detecting the second optical signal to obtain type information, the type information indicating the type of the optical network terminal; and obtaining a detection result of the optical network terminal, the detection result including the identifier and type of the optical network terminal.

[0023] In one possible implementation, detecting the second optical signal to obtain the type of the optical network terminal includes: dividing the second optical signal into multiple sub-signals, the multiple sub-signals having different spectra; and determining the type information corresponding to the multiple sub-signals.

[0024] In one possible implementation, the type includes a first type; when the number of sub-signals with an intensity greater than or equal to an intensity threshold is less than a first quantity threshold, the type information indicates that the type of the optical network terminal is the first type.

[0025] In one possible implementation, if the spectrum of a sub-signal with an intensity greater than or equal to an intensity threshold belongs to a first type of wavelength range, the type information indicates that the type of the optical network terminal is a first type.

[0026] In one possible implementation, the type includes a second type; when the number of sub-signals with an intensity greater than or equal to an intensity threshold is greater than or equal to a first quantity threshold, the type information indicates that the type of the optical network terminal is the second type.

[0027] In one possible implementation, if the spectrum of a sub-signal with an intensity greater than or equal to an intensity threshold belongs to the second type of wavelength range, the type information indicates that the type of the optical network terminal is the second type.

[0028] In one possible implementation, determining type information corresponding to multiple sub-signals includes: generating multiple electrical signals based on the multiple sub-signals, wherein a sub-signal with an intensity greater than or equal to an intensity threshold is a sub-signal that generates an electrical signal with an amplitude greater than or equal to an amplitude threshold; and determining type information based on the multiple electrical signals.

[0029] In one possible implementation, the type information includes the amplitude of multiple electrical signals or the type of optical network terminal.

[0030] In one possible implementation, the method is applied to a detection device including multiple filters, each of which allows different spectra of signals to pass through. The second optical signal is spectrally divided to obtain multiple sub-signals, including: filtering the second optical signal through a first filter to obtain a sub-signal among the multiple sub-signals that corresponds to the spectrum of the signal allowed to pass through the first filter, wherein the first filter is any one of the multiple filters.

[0031] In one possible implementation, the signals allowed to pass through by the multiple filters have the same spectral width; or, the signals allowed to pass through by the multiple filters have different spectral widths; or, the signals allowed to pass through by the multiple filters corresponding to a first type of wavelength range have the same spectral width, and the signals allowed to pass through by the multiple filters corresponding to the first type of wavelength range have different spectral widths than the signals allowed to pass through by the filters corresponding to a second type of wavelength range.

[0032] In one possible implementation, the spectral width of the signal allowed to pass through by a plurality of filters corresponding to the first type of wavelength range is less than a first width threshold.

[0033] In one possible implementation, the method is applied to a detection device, which includes a diffraction grating or an arrayed waveguide grating; the second optical signal is spectrally divided to obtain multiple sub-signals, including: dividing the second optical signal spectrally using a diffraction grating or an arrayed waveguide grating to obtain multiple sub-signals.

[0034] In one possible implementation, the first type of wavelength range is a wavelength range between 1260 and 1280 nanometers or a wavelength range between 1290 and 1330 nanometers, and the second type of wavelength range is a wavelength range between 1280 and 1290 nanometers or a wavelength range between 1330 and 1360 nanometers.

[0035] Thirdly, a detection system for an optical network terminal is provided. The detection system includes a detection device and an optical network terminal. The optical network terminal is used to send optical signals to the detection device. The detection device is used to execute the detection method for the optical network terminal in any possible implementation of the second aspect above.

[0036] Fourthly, a computer program (product) is provided, comprising: computer program code, which, when executed by a computer, causes the computer to perform the optical network terminal detection method in any possible implementation of the second aspect above.

[0037] Fifthly, a computer-readable storage medium is provided that stores a program or instructions, wherein when the program or instructions are run on a computer, the optical network terminal detection method in any possible implementation of the second aspect is executed.

[0038] In a sixth aspect, a chip is provided, including a processor for retrieving and executing instructions stored in a memory, such that a computer equipped with the chip executes the optical network terminal detection method in any possible implementation of the second aspect above.

[0039] In a seventh aspect, another chip is provided, comprising: an input interface, an output interface, a processor, and a memory, wherein the input interface, the output interface, the processor, and the memory are connected via an internal connection path, the processor is used to execute code in the memory, and when the code is executed, a computer with the chip installed executes the optical network terminal detection method in any possible implementation of the second aspect above.

[0040] It should be understood that the beneficial effects achieved by the technical solutions and corresponding possible implementations of the second to seventh aspects of this application can be found in the above description of the technical effects of the first aspect and its corresponding possible implementations, and will not be repeated here. The detection device for the optical network terminal provided in the first aspect may include the chip provided in the sixth or seventh aspect. Attached Figure Description

[0041] Figure 1 A schematic diagram of the spectrum of a signal emitted by an ONT using a DFB laser, provided for related technologies;

[0042] Figure 2 A schematic diagram illustrating a wavelength range provided in an embodiment of this application;

[0043] Figure 3 A schematic diagram of the spectrum of a signal emitted by an ONT using an FP laser, provided for related technologies;

[0044] Figure 4 A schematic diagram of the structure of a detection device for an optical network terminal provided in an embodiment of this application;

[0045] Figure 5 A schematic diagram illustrating an implementation scenario provided in this application.

[0046] Figure 6 A schematic diagram illustrating another implementation scenario provided by the embodiments of this application;

[0047] Figure 7 A schematic diagram illustrating yet another implementation scenario provided by the embodiments of this application;

[0048] Figure 8 This is a schematic diagram of another detection device provided in an embodiment of this application;

[0049] Figure 9 A schematic diagram of equally spaced spectral dispersion provided in an embodiment of this application;

[0050] Figure 10 A schematic diagram of unequal-interval spectral dispersion provided in an embodiment of this application;

[0051] Figure 11 A schematic diagram illustrating a detection principle provided in an embodiment of this application;

[0052] Figure 12 A schematic diagram of a detection device provided in an embodiment of this application;

[0053] Figure 13 This is a flowchart of a detection method for an optical network terminal provided in an embodiment of this application. Detailed Implementation

[0054] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0055] With the development of PON, PON technology has gradually become the mainstream technology for fixed broadband access. PON includes an optical line termination (OLT), an optical distribution network (ODN), and multiple optical network terminations (ONTs). The OLT and multiple ONTs are connected through the ODN to form a point-to-multipoint passive architecture, realizing the connection between the network backbone and end users, i.e., the "last mile" of the optical network.

[0056] In PON, there are various types of ONTs. For example, according to the evolutionary generations of PON, ONTs include GPON ONTs, 10G GPON ONTs, EPON ONTs, 10G EPON ONTs, or 50G PON ONTs, etc. According to the type of laser used, ONTs include those using FP lasers and those using DFB lasers, etc. During the development of PON, different types of ONTs can be treated differently according to development needs and characteristics to meet the evolving requirements of PON.

[0057] For example, 50G PON is a new generation of PON technology established by international standards. It is the common choice for the next generation of PON in both GPON and EPON standard systems, achieving unification of PON generational evolution. The implementation of each generation of PON technology must consider compatibility with the previous generation, or even the two generations prior, to protect network investment and promote smooth network evolution. For instance, when deploying 10G GPON, which evolved from GPON, compatibility with GPON needs to be considered. This compatibility is achieved through wavelength division multiplexing (WDM), meaning that on the same PON network, terminals connected to both GPON and 10G GPON use different wavelengths for uplink and downlink, without interference. 10G EPON, which evolved from EPON, is slightly different. Its downlink coexists with EPON WDM, but its uplink coexists with EPON terminals using time division multiplexing (TDM).

[0058] Correspondingly, the deployment of 50G PON must also consider the issue of smooth evolution. Therefore, the standard defines different uplink and downlink wavelengths for 50G PON compared to GPON and 10G GPON. This means that the three generations of PON achieve coexistence and smooth evolution through wavelength division multiplexing (WDM). Since 50G PON is also the next-generation standard for EPON and 10G EPON, it must also consider coexistence and evolution with EPON and 10G EPON. Currently, EPON and 10G EPON use downlink WDM and uplink time division multiplexing, but the bandwidth allocation methods for 50G GPON and 10G EPON are different. Therefore, with 50G PON, its uplink must coexist with EPON and 10G EPON WDM. Thus, typically, within a 50G & 10G EPON & EPON OLT optical module, there are two receiving channels: one for receiving 50G uplink and the other for receiving 10G EPON and EPON uplink. To achieve wavelength division coexistence of 50GPON with EPON and 10G EPON, it is necessary to ensure that the uplink signal wavelength ranges of 50G PON, EPON and 10G EPON are different.

[0059] The signals emitted by the ONTs of EPON and 10G EPON exhibit multiple uplink wavelengths, including wavelengths between 1260 and 1280 nm or between 1290 and 1330 nm. These two wavelengths are those emitted by ONTs using DFB lasers. The effective spectral width of signals emitted by ONTs using DFB lasers is approximately 1 nm, and the signal contains only one dominant mode (i.e., only one dominant energy point). For example, see... Figure 1 This image shows a schematic diagram of the spectrum of a signal emitted by an ONT using a DFB laser, provided by related technologies. The schematic diagram illustrates the distribution characteristics of the signal emitted by the ONT using a DFB laser at different wavelengths, such as... Figure 1 As shown, the signal includes only one main mode, with a wavelength of approximately 1308 nm. Even if the wavelength range of the signal changes due to temperature, noise, or transmission, the main mode of the signal emitted by the ONT using a DFB laser remains between 1260–1280 nm or 1290–1330 nm, and the width of the effective spectrum remains between 1 and 2 nm, meaning the width of the main mode remains between 1 and 2 nm.

[0060] The wavelength range of the signal emitted by the ONT in a 50G PON is 1284–1288 nm, which differs from the wavelength range of the signal emitted by an ONT using a DFB laser. For example, see... Figure 2The schematic diagram shown in this application illustrates a wavelength range. The wavelength range of the signal emitted by the ONT using a DFB laser (1260–1280 or 1290–1330 nm) differs from and does not overlap with the wavelength range of the signal emitted by the ONT of a 50G PON (1284–1288 nm). Therefore, the ONT using a DFB laser can achieve uplink wavelength division multiplexing with the ONT of a 50G PON.

[0061] However, the signals emitted by the ONTs of EPON and 10G EPON also exhibit another uplink wavelength, namely, a wavelength between 1260 and 1360 (or expressed as 1310 ± 50) nm. This wavelength is the wavelength of signals emitted by ONTs using FP lasers, whose effective spectral width is 20–30 nm (possibly due to temperature drift). For example, see... Figure 3 This image shows a schematic diagram of the spectrum of a signal emitted by an ONT using an FP laser, provided by related technologies. The schematic diagram illustrates the distribution characteristics of the signal emitted by the ONT using an FP laser at different wavelengths, such as... Figure 3 As shown, the signal includes multiple longitudinal modes, and these modes are high-intensity, with their combined energy dominating. Typically, the interval between two adjacent longitudinal modes is 0.6–2 nm. Figure 3 The interval between any two adjacent longitudinal modes is 1.2 nm. Therefore, it can be seen that the effective spectrum of the ONT signal using an FP laser is wider than that of the ONT signal using a DFB laser. The effective spectrum of the ONT signal using an FP laser is 20-30 nm, and the effective spectrum of the ONT signal using an FP laser may be any 20-30 nm within the range of 1260-1360 nm.

[0062] Please continue reading Figure 2 The wavelength range (1260–1360 nm) of the signal emitted by the ONT using an FP laser overlaps with the wavelength range (1284–1288 nm) of the signal emitted by the ONT of a 50G PON. Therefore, the effective spectrum of the signal emitted by the ONT using an FP laser may also overlap with the effective spectrum of the signal emitted by the ONT of a 50G PON, making it difficult for the ONT using an FP laser to achieve reliable wavelength division multiplexing in the uplink direction with the ONT of a 50G PON.

[0063] To achieve wavelength division multiplexing (WDM) coexistence of 50G PON with EPON and / or 10G EPON, the 50G receiving channel within the OLT optical module receiving uplink signals receives signals with an effective spectrum between 1284 and 1288 nm, while the 10G EPON & EPON receiving channel receives signals with an effective spectrum between 1260 and 1280 nm or between 1290 and 1330 nm. During the deployment of such 50G PON & 10G EPON OLT boards and optical modules, operators aim to detect the type of the EPON and / or 10G EPON ONTs connected to the original 10G EPON & EPON boards before deploying 50G PON using the network management system. If an EPON or 10G EPON ONT using an FP laser is detected, it needs to be replaced. After replacement, the 10G EPON & EPON boards can be seamlessly transitioned to the 50G PON boards.

[0064] When detecting the type of ONT in EPON or 10G EPON, related technologies compare the equipment information reported by the ONT with the shipping information of the equipment manufacturer to identify ONTs using FP lasers. However, ONTs using FP lasers are generally older models, and many of these manufacturers are small, with information on many no longer available. Therefore, these technologies cannot completely identify all ONTs using FP lasers. Furthermore, the detection method is inefficient, time-consuming, and labor-intensive.

[0065] More importantly, ONTs using FP lasers are widely deployed in the current network, accounting for over 85%. Therefore, there is an urgent need for an efficient and accurate detection method to identify the type of ONTs in the current network, in order to identify ONTs using FP lasers and replace them accordingly, ensuring a smooth evolution of 50G PON.

[0066] This application provides a detection device for optical network terminals, capable of accurately and efficiently detecting the type of an optical network terminal. This detection device can be any device, device cluster, or component on a device in a PON environment capable of detecting the type of an optical network terminal. For example, the detection device can be a portable, miniaturized instrument.

[0067] See Figure 4 The diagram shows a structural schematic of a detection device for an optical network terminal according to an embodiment of this application. This detection device includes, but is not limited to, […]. Figure 4The diagram shows a beam splitting module 11, a management module 12, and a detection module 13. In this embodiment, the beam splitting module 11 splits the optical signal emitted by the optical network terminal to obtain a first optical signal and a second optical signal; the management module 12 obtains the identifier of the optical network terminal corresponding to the first optical signal; the detection module 13 detects the second optical signal to obtain type information, which indicates the type of the optical network terminal; the management module 12 also obtains the detection result of the optical network terminal, which includes the identifier and type of the optical network terminal. In an exemplary embodiment of this application, the detected type of the optical network terminal may include a first type and a second type, where the first type is a type using a DFB laser and the second type is a type using an FP laser.

[0068] The structure and function of each module are described below to further explain the process and principle of the detection device in detecting optical network terminals and obtaining detection results.

[0069] During the detection process, the beam splitter 11 can receive the optical signal emitted by the optical network terminal. This embodiment does not limit the method by which the beam splitter 11 receives the optical signal emitted by the optical network terminal. The method by which the detection device receives the optical signal emitted by the optical network terminal may be related to the type of detection device and the implementation environment in which the detection device is located.

[0070] See Figure 5 This diagram illustrates an implementation scenario provided by an embodiment of this application. The implementation scenario includes an OLT, a primary optical splitter, a secondary optical splitter, and multiple optical network terminals, such as optical network terminal 1 and optical network terminal 2. The optical network terminal can be an ONT or a terminal device deployed with an optical network unit (ONU) or an optical modem. A detection device can be positioned between the optical network terminal and the secondary optical splitter, or between the primary optical splitter and the OLT, to detect the uplink optical signal emitted by the optical network terminal. Depending on the location of the detection device, it can be... Figure 5 The implementation scenarios shown are further divided into two different implementation scenarios, which can be described as follows: Figure 6 and Figure 7 As shown.

[0071] See Figure 6The diagram illustrates another implementation scenario provided by this application. This implementation scenario is Scenario 1. In Scenario 1, the EPON is cut to a 50G ODN plane, so the detection device can detect it at the secondary splitter to prevent incorrect cutover. That is, at the secondary splitter, the branch fiber connecting the secondary splitter and the optical network terminal (which can be any optical network terminal to be cut over connected to the secondary splitter, such as optical network terminal 1 or optical network terminal 2) can be unplugged and connected to the detection device. In Scenario 1, the optical signal emitted by the optical network terminal can be transmitted to the detection device via the optical fiber between the optical network terminal and the detection device, so that the detection device can receive the optical signal emitted by the optical network terminal.

[0072] See Figure 7 The diagram illustrates another implementation scenario provided by this application. This implementation scenario is Scenario 2. In Scenario 2, detection is performed before the entire board replacement splice. The detection device can perform the detection at the first-stage optical splitter. That is, at the first-stage optical splitter, the branch optical fiber connecting the first-stage optical splitter and the OLT can be unplugged and connected to the detection device. In Scenario 2, after the optical network terminal with authorized bandwidth emits an optical signal, the optical signal is transmitted through the first-stage optical splitter, the second-stage optical splitter, and the optical fiber between the second-stage optical splitter and the detection device to reach the detection device, so that the detection device can receive the optical signal emitted by the optical network terminal.

[0073] The above-described implementation scenarios and the descriptions of the detection devices receiving optical signals from optical network terminals in each scenario are merely examples. Different detection devices in different implementation scenarios can also receive optical signals from optical network terminals in other ways.

[0074] After receiving the optical signal from the optical network terminal, the beam splitting module 11 in the detection device can divide the optical signal into a first optical signal and a second optical signal. For example, the beam splitting module 11 may include a coupler to divide the optical signal into the first optical signal and the second optical signal. Optionally, the beam splitting module 11 may divide the optical signal evenly or unevenly.

[0075] After receiving the first optical signal, the management module 12 can obtain the identifier of the optical network terminal corresponding to the first optical signal. The identifier of the optical network terminal can be any information that can indicate the identity of the optical network terminal, such as the serial number of the optical network terminal, the media access control (MAC) address, or the logical optical network unit identifier (LOID).

[0076] This application embodiment does not limit the method by which the management module 12 obtains the identifier of the optical network terminal corresponding to the first optical signal. For example, the management module 12 can send an online indication message to the optical network terminal before the optical network terminal sends the optical signal, thus instructing the optical network terminal to go online. After the optical network terminal goes online, the management module 12 can query the identifier of the already online optical network terminal through the optical network management platform or network management system to obtain the identifier of the optical network terminal. Alternatively, the detection device can also query the identifier of the optical network terminal through a Simple Network Management Protocol (SNMP) command.

[0077] Or, targeting Figure 7 In scenario 2, multiple optical network terminals may come online simultaneously. The detection device can obtain the identifiers of multiple optical network terminals after they come online. To accurately obtain the identifier of the optical network terminal being detected, the detection device can authorize uplink bandwidth to the optical network terminal being detected, but not to other online optical network terminals. This ensures that only the optical network terminal being detected can send optical signals to the detection device. Therefore, when the management module 12 receives the first optical signal, it can determine that the first optical signal was sent by the optical network terminal being detected, thereby identifying the identifier of the optical network terminal being detected from among the identifiers of multiple optical network terminals.

[0078] In addition, after the splitting module 11 obtains the second optical signal, the detection module 13 can receive the second optical signal and detect it to obtain information indicating the type of optical network terminal.

[0079] For example, see Figure 8 The schematic diagram shown below illustrates another detection device provided in an embodiment of this application. The detection module 13 may include a division unit 131 and a determination unit 132. The division unit 131 is used to perform spectral division on the second optical signal to obtain multiple sub-signals, and the multiple sub-signals have different spectra. The determination unit 132 is used to determine the type information corresponding to the multiple sub-signals.

[0080] This application embodiment does not limit the composition of the segmentation unit 131. For example, the segmentation unit 131 may include multiple filters, and different filters allow signals with different spectra to pass through. The segmentation unit 131 can segment the second optical signal using multiple filters to obtain multiple sub-signals. For example, a first filter among the multiple filters is used to filter the second optical signal to obtain a sub-signal among the multiple sub-signals that corresponds to the spectrum of the signal allowed to pass through the first filter. The first filter can be any one of the multiple filters. By using multiple filters with different allowed signal spectra, the second optical signal can be accurately divided into multiple sub-signals with different spectra.

[0081] This application does not limit the spectral width of the signals allowed to pass through the multiple filters. In one possible implementation, the signals allowed to pass through the multiple filters have the same spectral width, achieving equal-interval beam splitting (or equal-splitting) of the second optical signal. See also Figure 9 The diagram shows a schematic of an equally spaced spectral splitting method provided in an embodiment of this application. Figure 9 In this design, the width of the spectrum that each filter is allowed to pass through is set to 10 nm. One filter allows the spectrum of the signal to pass through to correspond to 1260–1270 nm, another filter allows the spectrum of the signal to pass through to correspond to 1270–1280 nm, and so on.

[0082] When setting the spectral width of signals allowed to pass through multiple filters, it can be set according to the characteristics of the effective spectrum of the optical signals emitted by each optical network terminal to be detected. The effective spectrum refers to the spectrum with high intensity, such as the spectrum of each longitudinal mode in a signal emitted by a broadband ONT, or the spectrum of the dominant mode in a signal emitted by a narrowband ONT. Optionally, when setting the spectral width of signals allowed to pass through multiple filters, the spectral width can be set to completely cover the effective spectral range of the DFB. For example, the spectral width can be set to 1nm, 2nm, 5nm, or 10nm. If the spectral width is not set appropriately, it may affect the detection results. For example, if the spectral width is set too wide, such as to 20nm, it will result in coarse detection granularity. For instance, when detecting signals emitted by a broadband optical network terminal, a spectral width set too wide may cause signals in other bands to be too weak to be detected. Conversely, if the spectral width is set too narrow, such as to 0.1nm, multiple detection bands may detect signals of the same wavelength, leading to misjudgment.

[0083] In another possible implementation, multiple filters allow signals with different spectral widths to pass through, achieving unequal-interval splitting of the second optical signal. For example, some filters allow signals with a spectral width of 1 nm, some allow signals with a spectral width of 5 nm, and some allow signals with a spectral width of 10 nm. In the case of unequal-interval splitting, the spectral width of the signals allowed by each filter can be set according to the characteristics of the effective spectrum of the optical signals emitted by each optical network terminal to be detected.

[0084] For example, filters corresponding to the first type of wavelength range allow signals with the same spectral width, but the spectral width of signals allowed by filters corresponding to the first type of wavelength range differs from the spectral width of signals allowed by filters corresponding to the second type of wavelength range. The first type of wavelength range is either the wavelength range between 1260 and 1280 nm or the wavelength range between 1290 and 1330 nm, or a subset of the wavelength range between 1260 and 1280 nm or the wavelength range between 1290 and 1330 nm; the second type of wavelength range is either the wavelength range between 1280 and 1290 nm or the wavelength range between 1330 and 1360 nm, or a subset of the wavelength range between 1280 and 1290 nm or the wavelength range between 1330 and 1360 nm.

[0085] Since the spectrum distributed in the first type of wavelength range could be the spectrum of signals emitted by both the first type of optical network terminal and the second type of optical network terminal, the spectral width of the signals allowed to pass through the filters corresponding to the first type of wavelength range can be set to a smaller value. This allows for finer-grained segmentation of signals within the first type of wavelength range, thereby enabling more accurate detection of the type of optical network terminal. For example, the spectral width of the signals allowed to pass through multiple filters corresponding to the first type of wavelength range can be less than a first width threshold. The size of the first width threshold is determined by its ability to distinguish between the spectra of optical signals emitted by narrow-band ONTs and those emitted by wide-band ONTs; for example, the first width threshold could be set to 2 nm or 3 nm. In contrast, the spectrum distributed in the second type of wavelength range can only be the spectrum of signals emitted by the second type of optical network terminal. Therefore, as long as a sub-signal with a spectrum distributed in the second type of wavelength range is detected, the type of optical network terminal can be determined. Thus, the spectral width of the signals allowed to pass through the filters corresponding to the second type of wavelength range can be set to a larger value.

[0086] See Figure 10 This illustration shows a schematic diagram of unequal-spaced spectral splitting provided in an embodiment of this application. Spectroscopy within the first type of wavelength range is unequal-spaced spectral splitting. Each filter, whose allowed signal spectrum falls within the first type of wavelength range, has the same spectral width for the allowed signal. For example... Figure 10In this design, filters that allow signals with spectra within the range of 1260–1280 nm or 1290–1330 nm have a spectral width of 1 nm. For example, one filter corresponding to the first type of wavelength range allows signals with a spectrum of 1260–1261 nm, another filter corresponding to the first type of wavelength range allows signals with a spectrum of 1261–1262 nm, and so on. Correspondingly, the spectral splitting within the second type of wavelength range can be either equally spaced or unequally spaced. That is, the spectral widths of the signals allowed to pass through filters within the second type of wavelength range can be the same or different. Taking unequally spaced spectral splitting within the second type of wavelength range as an example... Figure 10 In this example, one filter, corresponding to the second type of wavelength range, allows signals with a spectrum of 1280–1290 nm to pass through, and the width of the allowed signal spectrum is 10 nm. The other filter, also corresponding to the second type of wavelength range, allows signals with a spectrum of 1330–1360 nm to pass through, and the width of the allowed signal spectrum is 30 nm.

[0087] In the embodiments of this application, the spectral width of the signal allowed to pass through the filter indicates the spectral width and division granularity of different sub-signals. In this application, the spectral width of the signal allowed to pass through multiple filters can be adjusted to achieve signal division of multiple granularities, which is more flexible and can achieve accurate detection according to detection requirements.

[0088] Alternatively, the dividing unit 131 may also include a diffraction grating, which can divide the second optical signal into multiple sub-signals. The diffraction grating comprises a series of parallel slits or grooves uniformly distributed on the surface of an optical material. The optical material can be transparent plastic, glass, or a thin metal film, etc. When the second optical signal reaches the diffraction grating, due to the wave nature of light, the second optical signal diffracts at each groove or slit on the diffraction grating. Since the second optical signal includes multiple wavelengths, signals of different wavelengths have different diffraction angles on the surface of the diffraction grating. Therefore, the second optical signal is dispersed into different angles after passing through the diffraction grating, resulting in multiple sub-signals with different spectra.

[0089] The granularity of the second optical signal can be adjusted by at least one of the following: the grating constant of the diffraction grating (i.e., the groove spacing), the incident angle of the second optical signal, or the material of the diffraction grating. For example, the incident angle of the second optical signal can be adjusted by changing the position of the diffraction grating, thereby increasing the diffraction order of the second optical signal through the diffraction grating, improving the resolution, and making the granularity of the second optical signal finer.

[0090] Alternatively, the dividing unit 131 may also include an arrayed waveguide grating, which can divide the second optical signal into multiple sub-signals. The arrayed waveguide grating includes multiple optical waveguides arranged in an array on a plane. These waveguides have different refractive indices for the optical signal, and adjacent waveguides are coupled through a junction point. After entering the arrayed waveguide grating, the second optical signal propagates through multiple waveguides. When the second optical signal reaches the junction point, the coupling between the waveguides causes signals of different wavelengths to propagate in different ways within the waveguides. Due to the different propagation characteristics of signals of different wavelengths, sub-signals corresponding to different spectra are dispersed at the output. That is, after the second optical signal enters the arrayed waveguide grating, it outputs multiple sub-signals with different spectra.

[0091] Optionally, the granularity of the second optical signal can be adjusted by changing the coupling strength between multiple waveguides or the material of multiple waveguides.

[0092] Regardless of the structure of the segmentation unit 131 or the method used to segment the second optical signal, the determination unit 132 can determine the type information corresponding to the multiple sub-signals after obtaining them. For example, the determination unit 132 can determine the type information using the following methods one and two.

[0093] Method 1: The determining unit 132 can detect the intensity of multiple sub-signals and determine type information based on the intensity of the multiple sub-signals. For example, the determining unit 132 may include an optical receiver (such as a photodetector) to measure the intensity of each received sub-signal. The intensity of each sub-signal may be represented by a received signal strength indicator (RSSI) or a signal detection indicator (SD). Optionally, the determining unit 132 may send type information including the intensity of multiple sub-signals to the management module 12, or it may send type information including the intensity of multiple sub-signals and the wavelength range of multiple sub-signals to the management module 12.

[0094] Furthermore, the determining unit 132 can also determine the type of the optical network terminal based on multiple sub-signals and send type information, including the type of the optical network terminal, to the management module 12. The determining unit 132 can determine the type of the optical network terminal in various ways. For example, the determining unit 132 can identify sub-signals among multiple sub-signals whose intensity is greater than or equal to an intensity threshold, and determine the type of the optical network terminal based on the number of sub-signals whose intensity is greater than or equal to the threshold. The intensity threshold is a value that can distinguish between noise and valid signals, and can be set based on experience or detection accuracy.

[0095] In this application embodiment, the type includes a first type, which can be a narrowband type, or in other words, the optical network terminal of the first type can be an optical network terminal using a DFB laser. Based on Figure 1 As can be seen from the description of the characteristics of the signals emitted by optical network terminals using DFB lasers, the effective spectral width of the signals emitted by the first type of optical network terminal is relatively small. Therefore, the number of sub-signals corresponding to the effective spectrum is relatively small, meaning the number of sub-signals with an intensity greater than or equal to the intensity threshold is relatively small. Thus, if the number of sub-signals with an intensity greater than or equal to the intensity threshold is less than a first quantity threshold, and multiple sub-signals conform to the characteristics of sub-signals of the first type of optical network terminal, the type of optical network terminal can be determined to be the first type, and the type information indicates that the type of optical network terminal is the first type. The first quantity threshold can be determined based on the beam splitting interval. For example, if the splitting interval when the dividing unit 131 divides the second optical signal is 1 nm, then the first quantity threshold can be set to 2 or 3; if the splitting interval when the dividing unit 131 divides the second optical signal is 2 nm, then the first quantity threshold can be set to 1 or 2.

[0096] Furthermore, the effective spectrum of the signal emitted by the first type of optical network terminal is usually distributed in the first type of wavelength range (1260-1280nm or 1290-1330nm). Therefore, when the number of sub-signals with intensity greater than or equal to the intensity threshold is less than the first quantity threshold and the spectrum of the sub-signals with intensity greater than or equal to the intensity threshold belongs to the first type of wavelength range, the type of optical network terminal can be more accurately determined to be the first type, and the type information indicating the type of optical network terminal can also be more accurately determined to be the first type.

[0097] Correspondingly, the type can also include a second type, which can be a broadband type, or in other words, the second type of optical network terminal can be an optical network terminal using an FP laser. Based on Figure 3 As can be seen from the description of the characteristics of the signals emitted by the optical network terminal using the FP laser, the second type of optical network terminal emits a wider effective spectrum, and therefore there are more sub-signals corresponding to the effective spectrum, that is, there are more sub-signals with an intensity greater than or equal to the intensity threshold. Therefore, if the number of sub-signals with an intensity greater than or equal to the intensity threshold is greater than or equal to the first quantity threshold, and multiple sub-signals meet the characteristics of the sub-signals of the second type of optical network terminal, the type of optical network terminal can be determined to be the second type, and the type information also indicates that the type of optical network terminal is the second type.

[0098] Since the second type of wavelength range is the wavelength range in which the spectrum of the signal emitted by the first type of optical network terminal will not be distributed, even if the signal emitted by the first type of optical network terminal is affected by noise, the effective spectrum of the signal emitted by the first type of optical network terminal will still not be distributed in the second type of wavelength range. Therefore, if the spectrum of the sub-signal with an intensity greater than or equal to the intensity threshold belongs to the second type of wavelength range, regardless of whether the number of sub-signals with an intensity greater than or equal to the intensity threshold is greater than the first quantity threshold, the type of optical network terminal can be determined to be the second type.

[0099] For example, see Figure 11 The diagram illustrates a detection principle provided by an embodiment of this application. Both spectra in the diagram represent the spectra of signals emitted by a second-type optical network terminal. It can be seen that the effective spectrum of the signal emitted by the second-type optical network terminal is wider, corresponding to a larger number of sub-signals with intensities greater than or equal to an intensity threshold. Furthermore, the effective spectrum may be distributed within the second-type wavelength range. Therefore, if the number of sub-signals with intensities greater than or equal to the intensity threshold is greater than or equal to a first quantity threshold, or if the spectrum of the sub-signals with intensities greater than or equal to the intensity threshold belongs to the second-type wavelength range, the type of optical network terminal can be determined to be second-type.

[0100] In this application, the width of the effective spectrum is indicated by the number of sub-signals with an intensity greater than or equal to an intensity threshold. By comparing the number of sub-signals with an intensity greater than or equal to an intensity threshold with a first quantity threshold, the type of optical network terminal can be determined quickly and accurately.

[0101] Method 2: The determining unit 132 can generate multiple electrical signals based on multiple sub-signals; then, based on the multiple electrical signals, it determines the type information.

[0102] The generated multiple electrical signals can be electrical signals obtained by converting multiple sub-signals, or electrical signals obtained by further processing based on the converted electrical signals. The processing can be of different types, such as noise reduction, amplification, or analog-to-digital conversion. For example, the determining unit 132 may include a receiving optical sub-assembly (ROSA) array. The number of ROSAs in the ROSA array is the same as the number of filters, waveguides, or grooves on the diffraction grating in the dividing unit 131, so that each divided sub-signal can have its own corresponding ROSA. Each ROSA converts the received sub-signal into an electrical signal.

[0103] Because the spectral range of the second optical signal is limited, only some ROSAs can receive the sub-signal and convert the received sub-signal into the corresponding electrical signal. Other ROSAs, although unable to receive the sub-signal, may receive noise and convert the received noise into an invalid electrical signal.

[0104] In one possible implementation, the amplitude of the electrical signal generated by ROSA based on the sub-signal is relatively small. Therefore, the determining unit 132 can further amplify the electrical signal obtained from ROSA conversion and use the amplified electrical signal as the generated electrical signal. Optionally, the determining unit 132 can amplify the electrical signal obtained from ROSA conversion in one stage or multiple stages using an amplifier (e.g., a limited amplifier (LA) or a linear amplifier) ​​to obtain multiple amplified electrical signals, which are the multiple electrical signals generated by the determining unit 132. Optionally, the multiple electrical signals generated by the determining module 132 can be analog signals or digital signals. For example, the electrical signal amplified by the limited amplifier can be a digital signal, and the amplitude of the electrical signal can be represented by a decision value (e.g., 0 or 1). If the signal input to the limited amplifier is weak, the output electrical signal is low (or represented as 0); if the signal input to the limited amplifier is strong, the output electrical signal is high (or represented as 1). The electrical signal amplified by the linear amplifier can be an analog signal, and the amplitude of the electrical signal can be a voltage value or a current value.

[0105] Furthermore, the determining unit 132 can also determine the type of the optical network terminal based on multiple electrical signals. For example, the determining unit 132 can measure the amplitude of the electrical signals and determine electrical signals whose amplitude is greater than or equal to an amplitude threshold. If any electrical signal is a digital signal and the amplitude threshold is the value corresponding to a high-level electrical signal, then if the electrical signal is high-level or its decision value is 1, it can be determined that the electrical signal has an amplitude greater than or equal to the amplitude threshold. Conversely, it can be determined that the electrical signal has an amplitude less than or equal to the amplitude threshold.

[0106] If the amplitude of any electrical signal is greater than or equal to an amplitude threshold, then the intensity of the sub-signal that generated that electrical signal can be determined to be greater than or equal to an intensity threshold. That is, a sub-signal with an intensity greater than or equal to an intensity threshold is a sub-signal that generates an electrical signal with an amplitude greater than or equal to an amplitude threshold. After determining the sub-signals with an intensity greater than or equal to an intensity threshold based on the amplitudes of multiple electrical signals, the determining unit 132 can determine the type of optical network terminal based on the number of sub-signals with an intensity greater than or equal to an intensity threshold, following the method described in Method 1.

[0107] In some cases, the determining unit 132 can also determine the type of the optical network terminal based on the number of electrical signals with amplitudes greater than or equal to an amplitude threshold. For example, if the number of electrical signals with amplitudes greater than or equal to the amplitude threshold is less than a first quantity threshold, the type of the optical network terminal can be determined to be a first type; while if the number of electrical signals with amplitudes greater than or equal to the amplitude threshold is greater than or equal to the first quantity threshold, the type of the optical network terminal can be determined to be a second type. Alternatively, the type of the optical network terminal can be determined more accurately by combining the number of electrical signals with amplitudes greater than or equal to the amplitude threshold with the spectrum of the generated electrical signals with amplitudes greater than or equal to the amplitude threshold.

[0108] Optionally, the type information may include one or more of the following: multiple electrical signals, the values ​​of multiple electrical signals, the spectra of multiple sub-signals that generate multiple electrical signals, or the type of optical network terminal.

[0109] Regardless of how the detection module 13 determines the type information, it can send the type information to the management module 12. The management module 12 can then generate the detection result of the optical network terminal, which includes the identifier and type of the optical network terminal.

[0110] For example, the management module 12 is equipped with a first interface, through which it connects to the detection module 13. The detection module 13 can transmit type information to the management module 11 via the first interface. The first interface on the management module enables communication between the management module and the detection module, allowing the management module to receive the type information of the optical network terminal transmitted by the detection module. The management module 12 can then obtain a detection result including the type and identifier of the optical network terminal. Before obtaining the detection result, the management module 12 can also determine the type of the optical network terminal based on the type information. If the type information includes the type of the optical network terminal, the management module 12 can directly determine the type in the type information as the type of the optical network terminal. If the type information does not include the type of the optical network terminal, but includes the intensity of multiple sub-signals, or includes the intensity of multiple sub-signals and the wavelength range of multiple sub-signals, the management module 12 can determine the type of the optical network terminal in the manner described in Method 1. If the type information does not include the type of the optical network terminal, but includes multiple electrical signals, or includes the spectrum of multiple electrical signals and the sub-signals that generate the multiple electrical signals, then the management module 12 can determine the type of the optical network terminal in the manner described in Method 2.

[0111] After obtaining the type of the optical network terminal, the management module 12 acquires the detection results, including the type and identifier of the optical network terminal. For example, it summarizes the type and identifier of the optical network terminal to obtain the detection results. Since the identifier and type of the optical network terminal are determined based on the same optical signal, the type and identifier of the optical network terminal in the detection results both correspond to the same optical network terminal, thus accurately determining the type of the optical network terminal corresponding to the identifier.

[0112] The detection process of the optical network terminal detection device provided in this application embodiment will be further described below with reference to the accompanying drawings and complete examples. See also Figure 12 The diagram illustrates a detection device according to an embodiment of this application. The detection device includes a 3dB coupler, a beam splitter filter, a ROSA array, an LA array, an MCU, and an OLT board. The OLT board includes an optical port (or test fiber interface), an OLT optical module, an FPGA, a microcontroller, and a Bluetooth module. This detection device is small in size and easy to carry.

[0113] In this embodiment, the 3dB coupler corresponds to the beam splitting module 11, the OLT board corresponds to the management module 12, and the beam splitting filter, ROSA array, LA array, and MCU correspond to the detection module 13. There can be multiple beam splitting filters, corresponding to multiple filters in the partitioning unit 131. The ROSA array, LA array, and MCU correspond to the determination unit 132.

[0114] After the fiber insertion detection device, the optical signal emitted by the optical network terminal reaches the 3dB coupler, which divides the received optical signal into a first optical signal and a second optical signal. The first optical signal is transmitted to the OLT board. Specifically, the first optical signal is transmitted to the OLT optical module through the optical port, and the OLT optical module sends the first optical signal to the FPGA. The FPGA can not only receive the first optical signal transmitted by the OLT optical module, but also has a built-in 10G EPON and / or EPON MAC. It can manage the online status and bandwidth authorization of the optical network terminal before the optical network terminal sends optical signals, and can also obtain the identification of the optical network terminal.

[0115] The second optical signal is transmitted to a beam splitter filter, which divides the second optical signal into multiple sub-signals and sends these sub-signals to the ROSA array connected to the component filter pigtail. The ROSA array performs photoelectric conversion on the multiple sub-signals and transmits them to the LA array. The LA array amplifies the photoelectric converted signals to obtain multiple electrical signals generated by the detection module 13. After receiving the multiple electrical signals, the MCU can determine the type of the optical network terminal based on the amplitude (corresponding to the linear amplifier) ​​or level decision value (corresponding to the limiting amplifier) ​​of the multiple electrical signals, and send type information including the type of the optical network terminal to the FPGA through the first interface connected to the MCU on the FPGA. Alternatively, the MCU can also send type information including multiple electrical signals to the FPGA through the first interface, and the FPGA can determine the type of the optical network terminal based on the multiple electrical signals.

[0116] After acquiring the type and identifier of the optical network terminal, the FPGA summarizes the information to obtain a detection result including the type and identifier of the optical network terminal. Optionally, the FPGA can transmit the detection result to a microcontroller. The microcontroller connects to Bluetooth via a serial port and transmits the detection result to a display device via the Bluetooth protocol. The display device can be, for example, a mobile phone, a computer, or a software system on the device, such as an app on a mobile phone. The display device can display the detection result. Furthermore, after the detection is completed, the optical fiber inserted into the detection device is reconnected to the first or second optical splitter to restore the optical network terminal's service.

[0117] After determining the detection results of the optical network terminal, the optical network terminal can be processed based on these results. For example, in... Figure 6 In the scenario shown, if the optical network terminal is of type 2, it will not be cut over to the 50G splitter port. Figure 7 In the scenario shown, if the optical network terminal is type II, the detection results can be reported to the network resource management system, allowing the operator to arrange replacements based on the results, replacing the type II optical network terminal with other types. After the replacement of the entire board of optical network terminals connected to the secondary splitter is completed, the entire board is spliced.

[0118] In summary, a portion of the optical signal emitted by the optical network terminal is transmitted to the management module, enabling the management module to obtain the identifier of the optical network terminal that emitted this portion of the optical signal. The other portion of the optical signal emitted by the optical network terminal is transmitted to the detection module, enabling the detection module to detect the type information of the optical network terminal. Based on the identifier and type information determined by the two portions of the optical signal, the management module obtains a detection result in which the identifier and type of the optical network terminal are accurately matched, that is, accurately and efficiently determining the type of optical network terminal corresponding to the identifier.

[0119] Furthermore, the optical network terminal detection device provided in this application embodiment can be modified from other devices (such as fiber optic dumb resource checkers), resulting in a low cost. Moreover, the detection device can be portable, enabling rapid and accurate detection of optical network terminals during inspections.

[0120] In an exemplary embodiment, a method for detecting an optical network terminal is provided. See also Figure 13 The illustrated flowchart illustrates a method for detecting an optical network terminal, which includes, but is not limited to, steps S1301 to S1304 below. This method can be executed by any of the aforementioned possible optical network terminal detection devices.

[0121] S1301 splits the optical signal emitted by the optical network terminal to obtain a first optical signal and a second optical signal.

[0122] S1302, Obtain the identifier of the optical network terminal corresponding to the first optical signal.

[0123] S1303, detect the second optical signal to obtain type information, which indicates the type of the optical network terminal.

[0124] In one possible implementation, detecting the second optical signal and obtaining type information includes: dividing the second optical signal into multiple sub-signals, the multiple sub-signals having different spectra; and determining the type information corresponding to the multiple sub-signals.

[0125] For example, this method can be applied to a detection device that includes multiple filters, each allowing a different spectrum of signal to pass through. In this case, spectral division of the second optical signal to obtain multiple sub-signals includes: filtering the second optical signal through a first filter to obtain a sub-signal among the multiple sub-signals that corresponds to the spectrum of the signal allowed to pass through the first filter, wherein the first filter is any one of the multiple filters.

[0126] Optionally, the signals allowed to pass through by the multiple filters have the same spectral width; or, the signals allowed to pass through by the multiple filters have different spectral widths; or, the signals allowed to pass through by the filters corresponding to the first type of wavelength range have the same spectral width, and the spectral width of the signals allowed to pass through by the filters corresponding to the first type of wavelength range is different from the spectral width of the signals allowed to pass through by the filters corresponding to the second type of wavelength range. Further, the spectral width of the signals allowed to pass through by the multiple filters corresponding to the first type of wavelength range is less than a first width threshold.

[0127] The first type of wavelength range is the wavelength range between 1260 and 1280 nanometers or between 1290 and 1330 nanometers, and the second type of wavelength range is the wavelength range between 1280 and 1290 nanometers or between 1330 and 1360 nanometers.

[0128] Alternatively, the method can be applied to a detection device, which includes a diffraction grating or an arrayed waveguide grating. In this case, the second optical signal is spectrally divided to obtain multiple sub-signals, including: dividing the second optical signal spectrally using a diffraction grating or an arrayed waveguide grating to obtain multiple sub-signals.

[0129] In one possible implementation, determining type information corresponding to multiple sub-signals includes: generating multiple electrical signals based on the multiple sub-signals, wherein a sub-signal with an intensity greater than or equal to an intensity threshold is a sub-signal that generates an electrical signal with an amplitude greater than or equal to an amplitude threshold; and determining type information based on the multiple electrical signals.

[0130] The type includes a first type; when the number of sub-signals with an intensity greater than or equal to an intensity threshold is less than a first quantity threshold, the type information indicates that the optical network terminal is of the first type. Alternatively, when the spectrum of a sub-signal with an intensity greater than or equal to an intensity threshold belongs to a first type of wavelength range and the number of sub-signals with an intensity greater than or equal to an intensity threshold is less than the first quantity threshold, the type information indicates that the optical network terminal is of the first type.

[0131] Furthermore, the type also includes a second type; if the number of sub-signals with an intensity greater than or equal to an intensity threshold is greater than or equal to a first quantity threshold, the type information indicates that the optical network terminal is of the second type. Alternatively, if the spectrum of a sub-signal with an intensity greater than or equal to an intensity threshold belongs to a second type of wavelength range, the type information indicates that the optical network terminal is of the second type.

[0132] S1304, Obtain the detection results of the optical network terminal, including the identification and type of the optical network terminal.

[0133] For an explanation of the execution process and beneficial effects of the optical network terminal detection method provided in the embodiments of this application, please refer to the explanation of the optical network terminal detection device and beneficial effects in the above embodiments, which will not be repeated here.

[0134] In an exemplary embodiment, a detection system for an optical network terminal is provided. The system includes an optical network terminal and a detection device for the optical network terminal. The optical network terminal is used to send optical signals to the detection device, and the detection device is used to perform the above-described detection method for the optical network terminal.

[0135] In an exemplary embodiment, a computer program (product) is provided, comprising: computer program code, which, when executed by a computer, causes the computer to perform... Figure 13 The method in the middle.

[0136] In an exemplary embodiment, a computer-readable storage medium is provided that stores a program or instructions, which, when executed on a computer, cause the computer to perform the aforementioned actions. Figure 13 The method in the middle.

[0137] In an exemplary embodiment, a chip is provided, including a processor for recalling and executing instructions stored in memory, causing a computer with the chip installed to perform... Figure 13 The method in the middle.

[0138] In an exemplary embodiment, another chip is provided, including: an input interface, an output interface, a processor, and a memory. The input interface, output interface, processor, and memory are connected via internal interconnection paths. The processor is used to execute code in the memory. When the code is executed, a computer with the chip installed performs... Figure 13 The method in the middle.

[0139] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive).

[0140] In this application, the terms "first," "second," etc., are used to distinguish identical or similar items with substantially the same function. It should be understood that there is no logical or temporal dependency between "first," "second," and "nth," nor does it limit the quantity or order of execution. It should also be understood that although the following description uses the terms "first," "second," etc., to describe various elements, these elements should not be limited by the terms. These terms are merely used to distinguish one element from another.

[0141] It should also be understood that, in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0142] In this application, the term "at least one" means one or more, and the term "multiple" means two or more. For example, multiple second devices means two or more second devices. The terms "system" and "network" are often used interchangeably herein.

[0143] It should be understood that the terminology used in the description of the various examples herein is for the purpose of describing particular examples only and is not intended to be limiting. As used in the description of the various examples and the appended claims, the singular forms “a” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0144] It should also be understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items. The term "and / or" describes an association between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects are in an "or" relationship.

[0145] It should also be understood that the terms “if” and “if” can be interpreted as meaning “when” or “upon”, or “in response to determination” or “in response to detection”. Similarly, depending on the context, the phrases “if determination…” or “if detection [the stated condition or event]” can be interpreted as meaning “when determination…”, or “in response to determination…”, or “when detection [the stated condition or event]” or “in response to detection [the stated condition or event]”.

[0146] The above description is merely an embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.

Claims

1. A detection device for an optical network terminal, characterized in that, The detection device includes a beam splitting module (11), a management module (12), and a detection module (13); The beam splitting module (11) is used to split the optical signal emitted by the optical network terminal to obtain a first optical signal and a second optical signal; The management module (12) is used to obtain the identifier of the optical network terminal corresponding to the first optical signal; The detection module (13) is used to detect the second optical signal and obtain type information, wherein the type information indicates the type of the optical network terminal; The management module (12) is also used to obtain the detection results of the optical network terminal, the detection results including the identifier and type of the optical network terminal.

2. The detection device according to claim 1, characterized in that, The detection module (13) includes a division unit (131) and a determination unit (132); The partitioning unit (131) is used to perform spectral partitioning on the second optical signal to obtain multiple sub-signals, wherein the multiple sub-signals have different spectra; The determining unit (132) is used to determine the type information corresponding to the plurality of sub-signals.

3. The detection device according to claim 2, characterized in that, The type includes a first type; when the number of sub-signals with an intensity greater than or equal to an intensity threshold is less than a first quantity threshold, the type information indicates that the type of the optical network terminal is the first type.

4. The detection device according to claim 3, characterized in that, If the number of sub-signals with an intensity greater than or equal to an intensity threshold is less than the first quantity threshold and the spectrum of the sub-signals with an intensity greater than or equal to the intensity threshold belongs to a first type of wavelength range, the type information indicates that the type of the optical network terminal is a first type.

5. The detection device according to claim 2, characterized in that, The type includes a second type; when the number of sub-signals with an intensity greater than or equal to an intensity threshold is greater than or equal to a first quantity threshold, the type information indicates that the type of the optical network terminal is the second type.

6. The detection device according to claim 2 or 5, characterized in that, When the spectrum of a sub-signal with an intensity greater than or equal to an intensity threshold belongs to the second type of wavelength range, the type information indicates that the type of the optical network terminal is the second type.

7. The detection device according to any one of claims 3-6, characterized in that, The determining unit (132) is further configured to generate multiple electrical signals based on the multiple sub-signals, wherein the sub-signals with an intensity greater than or equal to an intensity threshold are sub-signals that generate electrical signals with an amplitude greater than or equal to an amplitude threshold.

8. The detection device according to claim 7, characterized in that, The type information includes the amplitude of the plurality of electrical signals or the type of the optical network terminal.

9. The detection device according to any one of claims 2-8, characterized in that, The partitioning unit (131) includes multiple filters, and different filters allow different spectra of signals to pass through; The first filter among the plurality of filters is used to filter the second optical signal to obtain a sub-signal among the plurality of sub-signals that corresponds to the spectrum of the signal allowed to pass by the first filter. The first filter is any one of the plurality of filters.

10. The detection device according to claim 9, characterized in that, The multiple filters allow signals with the same spectral width to pass through; or, the multiple filters allow signals with different spectral widths to pass through. Alternatively, the signals allowed to pass through multiple filters corresponding to the first type of wavelength range have the same spectral width, and the spectral width of the signals allowed to pass through multiple filters corresponding to the first type of wavelength range is different from the spectral width of the signals allowed to pass through filters corresponding to the second type of wavelength range.

11. The detection device according to claim 10, characterized in that, The width of the spectrum of the signal allowed to pass through by the multiple filters corresponding to the first type of wavelength range is less than the first width threshold.

12. The detection device according to any one of claims 2-8, characterized in that, The dividing unit (131) includes a diffraction grating or an arrayed waveguide grating.

13. The detection device according to any one of claims 1-12, characterized in that, The management module (12) is equipped with a first interface, and the management module (12) is connected to the detection module (13) through the first interface; The detection module (13) is also used to transmit the type information to the management module (12) through the first interface; The management module (12) is used to obtain the detection results, including the type and identifier of the optical network terminal.

14. The detection device according to claim 4, 6, 10 or 11, characterized in that, The first type of wavelength range is the wavelength range between 1260 and 1280 nanometers or the wavelength range between 1290 and 1330 nanometers, and the second type of wavelength range is the wavelength range between 1280 and 1290 nanometers or the wavelength range between 1330 and 1360 nanometers.

15. A method for detecting an optical network terminal, characterized in that, The method includes: The optical signal emitted by the optical network terminal is split to obtain a first optical signal and a second optical signal; Obtain the identifier of the optical network terminal corresponding to the first optical signal; The second optical signal is detected to obtain type information, which indicates the type of the optical network terminal. Obtain the detection result of the optical network terminal, the detection result including the identifier and type of the optical network terminal.

16. The method according to claim 15, characterized in that, The detection of the second optical signal to obtain type information includes: The second optical signal is spectrally divided to obtain multiple sub-signals, and the multiple sub-signals have different spectra; Determine the type information corresponding to the plurality of sub-signals.

17. The method according to claim 16, characterized in that, The type includes a first type; when the number of sub-signals with an intensity greater than or equal to an intensity threshold is less than a first quantity threshold, the type information indicates that the type of the optical network terminal is the first type.

18. The method according to claim 17, characterized in that, If the number of sub-signals with an intensity greater than or equal to an intensity threshold is less than the first quantity threshold and the spectrum of the sub-signals with an intensity greater than or equal to the intensity threshold belongs to a first type of wavelength range, the type information indicates that the type of the optical network terminal is a first type.

19. The method according to claim 16, characterized in that, The type includes a second type; when the number of sub-signals with an intensity greater than or equal to an intensity threshold is greater than or equal to a first quantity threshold, the type information indicates that the type of the optical network terminal is the second type.

20. The method according to claim 16 or 19, characterized in that, If the spectrum of a sub-signal with an intensity greater than or equal to an intensity threshold belongs to the second type of wavelength range, the type information indicates that the type of the optical network terminal is the second type.

21. The method according to any one of claims 16-20, characterized in that, Determining the type information corresponding to the plurality of sub-signals includes: Multiple electrical signals are generated based on the multiple sub-signals, wherein the sub-signal with an intensity greater than or equal to an intensity threshold is the sub-signal that generates an electrical signal with an amplitude greater than or equal to an amplitude threshold; The type information is determined based on the plurality of electrical signals.

22. The method according to claim 21, characterized in that, The type information includes the amplitude of the plurality of electrical signals or the type of the optical network terminal.

23. The method according to any one of claims 16-22, characterized in that, The method is applied to a detection device, which includes multiple filters, and different filters allow different spectra of signals to pass through. The second optical signal is spectrally divided to obtain multiple sub-signals, including: The second optical signal is filtered by the first filter to obtain a sub-signal among the plurality of sub-signals that corresponds to the spectrum of the signal allowed to pass by the first filter. The first filter is any one of the plurality of filters.

24. The method according to claim 23, characterized in that, The multiple filters allow signals with the same spectral width to pass through; or, the multiple filters allow signals with different spectral widths to pass through. Alternatively, the signals allowed to pass through multiple filters corresponding to the first type of wavelength range have the same spectral width, and the spectral width of the signals allowed to pass through multiple filters corresponding to the first type of wavelength range is different from the spectral width of the signals allowed to pass through filters corresponding to the second type of wavelength range.

25. The method according to claim 24, characterized in that, The width of the spectrum of the signal allowed to pass through by the multiple filters corresponding to the first type of wavelength range is less than the first width threshold.

26. The method according to any one of claims 16-22, characterized in that, The method is applied to a detection device, which includes a diffraction grating or an arrayed waveguide grating. The second optical signal is spectrally divided to obtain multiple sub-signals, including: The second optical signal is spectrally divided using the diffraction grating or the arrayed waveguide grating to obtain the plurality of sub-signals.

27. The method according to claim 18, 20, 24 or 25, characterized in that, The first type of wavelength range is the wavelength range between 1260 and 1280 nanometers or the wavelength range between 1290 and 1330 nanometers, and the second type of wavelength range is the wavelength range between 1280 and 1290 nanometers or the wavelength range between 1330 and 1360 nanometers.

28. A detection system for an optical network terminal, characterized in that, The detection system includes a detection device and an optical network terminal; The optical network terminal is used to send optical signals to the detection device; The detection device is used to perform the detection method for an optical network terminal according to any one of claims 15-27.

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