Weak light section determination method and device, and storage medium

Abstract

The application provides a weak light section determination method and device and a storage medium, relates to the technical field of optical communication, and can solve the error problem of the existing weak light determination method. The method comprises the following steps: determining the sending power of a first optical signal sent by a light emitting module of an OLT and the receiving power when the first optical signal is reflected back to a light receiving module of the OLT by a light splitter connected to the OLT; determining whether the average value of the sending power and the receiving power is less than a first preset threshold value; if the average value is less than the first preset threshold value, it is determined that there is a weak light section in the uplink path of a PON; the uplink path is a transmission path between the OLT and the light splitter. The application can quickly and accurately determine whether there is a weak light section in the transmission path of the passive optical fiber network.

Description

Technical Field

[0001] This application relates to the field of optical communication technology, and in particular to a method, apparatus and storage medium for determining weak light segments. Background Technology

[0002] With the development of optical fiber communication technology, Passive Optical Network (PON) systems have been widely used in broadband access networks. A PON consists of an optical line terminal (OLT) installed at a central control station and a number of supporting optical network units (ONUs) installed at user sites. During the process of the OLT broadcasting optical signals containing data to the ONUs, optical channel attenuation occurs due to losses in transmission equipment and lines, making timely location of weak optical segments extremely important.

[0003] Existing technology determines the presence of primary weak light by acquiring the received optical power of all ONUs under the same PON port, calculating the proportion and dispersion, and then acquiring the received optical power of all ONUs under the secondary splitter where the weak ONU is located, calculating the proportion and dispersion to determine the presence of secondary weak light, thereby identifying the fault point and determining whether there is an uplink weak light problem. This method of determining weak light fault points is based on ONU received optical power, using an algorithm to calculate the ONU optical channel attenuation value to obtain the proportion and dispersion of ONUs, thus determining whether there is an uplink weak light problem, and therefore contains errors. Summary of the Invention

[0004] This application provides a method, apparatus, and storage medium for determining weak light segments, which solves the problem of errors in existing weak light determination methods and can quickly and accurately determine whether there are weak light segments in the transmission path of passive optical fiber networks.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] In a first aspect, this application provides a method for determining a weak light segment, applied in a passive optical network (PON). The PON includes an optical line terminal (OLT) and a splitter. The method includes: determining the transmission power of a first optical signal transmitted by the light-emitting module of the OLT, and the received power of the first optical signal when reflected back to the receiving module of the OLT by the splitter connected to the OLT; determining whether the average value of the transmission power and the received power is less than a first preset threshold; if the average value is less than the first preset threshold, determining that a weak light segment exists in the uplink path of the PON; the uplink path is the transmission path between the OLT and the splitter.

[0007] In conjunction with the first aspect described above, in one possible implementation, the optical transmission network further includes at least one optical network unit (ONU); after determining whether the average value of the transmitted power and the received power is less than a first preset threshold, the method further includes: if the average value is greater than or equal to the first preset threshold, determining whether the target ONU is a weak-light ONU; the target ONU is one of at least one ONU; if the target ONU is a weak-light ONU, determining that there is a weak-light segment in the target downlink path of the PON; the target downlink path is the transmission path between the optical splitter and the target ONU.

[0008] In conjunction with the first aspect described above, in one possible implementation, the optical transmission network further includes at least one optical network unit (ONU). After determining whether the average value of the transmitted power and the received power is less than a first preset threshold, the method further includes: acquiring the received power when the second optical signal is received by the target ONU; the target ONU is one of the at least one ONUs; determining whether the difference between the received power of the second optical signal and the average value is less than a second preset threshold; if the difference is less than the second preset threshold, determining that there is a weak light segment in the target downlink path of the PON; the target downlink path is the transmission path between the splitter and the target ONU.

[0009] In conjunction with the first aspect described above, in one possible implementation, the method further includes: sending first indication information to the OLT; the first indication information is used to instruct the light-emitting module of the OLT to send a first optical signal at a first time point; sending second indication information to each of the at least one ONU; wherein the second indication information is used to instruct the ONU to send a second optical signal at a second time point; the first time point is before the second time point, and the time interval between the first time point and the second time point is greater than or equal to a first time difference; the first time difference is the time difference between the transmission time of the optical signal between the OLT and the splitter and the transmission time of the optical signal between the splitter and a preset ONU; the preset ONU is the ONU with the shortest distance from the splitter among the at least one ONUs.

[0010] In conjunction with the first aspect mentioned above, in one possible implementation, the method further includes: the first time difference T satisfies the following formula:

[0011] T = BC, A ≥ T

[0012] Where A is the time interval between the first time point and the second time point, B is the transmission time of the optical signal between the OLT and the splitter, and C is the transmission time of the optical signal between the splitter and the preset ONU.

[0013] Secondly, this application provides a weak light segment determination device, which includes: a communication unit and a processing unit; the communication unit is used to determine the emission power of the first optical signal transmitted by the light-emitting module of the OLT, and the reception power of the first optical signal when it is reflected back to the light-receiving module of the OLT by the optical splitter connected to the OLT; the processing unit is used to determine whether the average value of the emission power and the reception power is less than a first preset threshold; the processing unit is further used to determine that a weak light segment exists in the uplink path of the PON if the average value is less than the first preset threshold; the uplink path is the transmission path between the OLT and the optical splitter.

[0014] In conjunction with the second aspect above, in one possible implementation, the processing unit is further configured to: determine whether the target ONU is a weak-light ONU if the average value is greater than or equal to a first preset threshold; the target ONU is one of the at least one ONUs; if the target ONU is a weak-light ONU, determine that there is a weak-light segment in the target downlink path of the PON; the target downlink path is the transmission path between the optical splitter and the target ONU.

[0015] In conjunction with the second aspect above, in one possible implementation, the communication unit is further configured to acquire the received power when the second optical signal is received by the target ONU; the target ONU is one of at least one ONU; the processing unit is further configured to determine whether the difference between the received power of the second optical signal and the average value is less than a second preset threshold; the processing unit is further configured to determine that if the difference is less than the second preset threshold, there is a weak light segment in the target downlink path of the PON; the target downlink path is the transmission path between the optical splitter and the target ONU.

[0016] In conjunction with the second aspect above, in one possible implementation, the communication unit is further configured to: send first indication information to the OLT; the first indication information is used to instruct the light-emitting module of the OLT to send a first optical signal at a first time point; send second indication information to each of at least one ONU; wherein the second indication information is used to instruct the ONU to send a second optical signal at a second time point; the first time point is before the second time point, and the time interval between the first time point and the second time point is greater than or equal to a first time difference; the first time difference is the time difference between the transmission time of the optical signal between the OLT and the splitter and the transmission time of the optical signal between the splitter and a preset ONU; the preset ONU is the ONU with the shortest distance from the splitter among at least one ONU.

[0017] In conjunction with the second aspect above, in one possible implementation, the first time difference T satisfies the following formula:

[0018] T = BC, A ≥ T

[0019] Where A is the time interval between the first time point and the second time point, B is the transmission time of the optical signal between the OLT and the splitter, and C is the transmission time of the optical signal between the splitter and the preset ONU.

[0020] Thirdly, this application provides a weak light segment determination apparatus, which includes: a processor and a communication interface; the communication interface and the processor are coupled, and the processor is used to run computer programs or instructions to implement the weak light segment determination method as described in the first aspect and any possible implementation of the first aspect.

[0021] Fourthly, this application provides a computer-readable storage medium storing instructions that, when executed on a terminal, cause the terminal to perform the weak light segment determination method as described in the first aspect and any possible implementation thereof.

[0022] Fifthly, this application provides a computer program product containing instructions that, when run on a low-light segment determination device, causes the low-light segment determination device to perform the low-light segment determination method as described in the first aspect and any possible implementation thereof.

[0023] In a sixth aspect, this application provides a chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run computer programs or instructions to implement the weak light segment determination method as described in the first aspect and any possible implementation thereof.

[0024] Specifically, the chip provided in this application also includes a memory for storing computer programs or instructions.

[0025] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the processor of the device, or it may be packaged separately from the processor of the device; this application does not impose any limitation on this.

[0026] In a seventh aspect, this application provides a weak light segment determination system, comprising: a weak light segment determination device, a data server, an optical line terminal, a beam splitter, and an optical network unit, wherein the weak light segment determination device is used to perform the weak light segment determination method as described in the first aspect and any possible implementation thereof.

[0027] The descriptions of aspects two through seven in this application can be referenced to the detailed description of aspect one; and the beneficial effects of the descriptions of aspects two through seven can be referenced to the analysis of the beneficial effects of aspect one, which will not be repeated here.

[0028] In this application, the name of the aforementioned low-light segment determination device does not limit the device or functional module itself. In actual implementation, these devices or functional modules may appear under other names. As long as the function of each device or functional module is similar to that of this application, it falls within the scope of the claims of this application and its equivalents.

[0029] These or other aspects of this application will become more readily apparent in the following description.

[0030] The above solution offers at least the following advantages: Based on the above technical solution, in the weak light segment determination method provided in this application, the weak light segment determination device determines the transmission power of the first optical signal sent by the OLT's light-emitting module and the received power when the first optical signal is reflected back to the OLT's receiving module by the beam splitter connected to the OLT. The weak light segment determination device determines whether the average value of the transmitted power and the received power is less than a first preset threshold. If the average value is less than the first preset threshold, it determines that a weak light segment exists in the transmission path between the OLT and the beam splitter. Compared with the prior art, which relies on the ONU's received power and calculates the ONU's optical channel attenuation value using an algorithm to determine the proportion and dispersion of the ONU and thus judge whether there is a weak light problem in the uplink, this method has the advantage of accuracy. Since the first optical signal is emitted by the OLT's light-emitting module along the direction of the beam splitter and reflected back to the OLT's receiving module by the beam splitter, the weak light segment determination device can quickly and accurately determine whether there is an uplink weak light segment in the transmission path between the OLT and the beam splitter by the signal power of the first optical signal during the reflection process in the uplink transmission. Attached Figure Description

[0031] Figure 1 A schematic diagram of the architecture of a low-light segment determination system provided in this application embodiment;

[0032] Figure 2 This is a schematic diagram of the structure of an optical line terminal provided in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the structure of a passive optical fiber network provided in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of a weak light segment determination device provided in an embodiment of this application;

[0035] Figure 5 A flowchart illustrating a method for determining a low-light segment provided in this application embodiment;

[0036] Figure 6 A flowchart illustrating another method for determining low-light segments provided in this application embodiment;

[0037] Figure 7 A flowchart illustrating another method for determining low-light segments provided in this application embodiment;

[0038] Figure 8 A flowchart illustrating another method for determining low-light segments provided in this application embodiment;

[0039] Figure 9 This is a schematic diagram of another weak light segment determination device provided in an embodiment of this application. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0042] The terms "first" and "second," etc., used in the specification and drawings of this application are used to distinguish different objects or to distinguish different treatments of the same object, rather than to describe a specific order of objects.

[0043] Furthermore, the terms "comprising" and "having," and any variations thereof, used in the description of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include other steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0044] It should be noted that in the embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0045] In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0046] With the development of optical fiber communication technology, PON systems have been widely used in broadband access networks. A passive optical fiber network includes an OLT installed at a central control station and a number of ONUs installed at user sites. During the process of the OLT broadcasting optical signals containing data to the ONUs, optical channel attenuation caused by weak light segments occurs due to losses in transmission equipment and lines. Timely location of weak light segments becomes extremely important.

[0047] Existing technology 1: When a weak light ONU occurs, the received light power of all ONUs under the same PON port is obtained, and the proportion and dispersion are calculated to determine whether there is a first-level weak light; then the received light power of all ONUs under the second-level splitter where the weak light ONU is located is obtained, and the proportion and dispersion are calculated to determine whether there is a second-level weak light, thereby determining the fault point.

[0048] Existing technology 2: By collecting the transmit and receive power of OLT and ONU, and forming a dynamic optical attenuation standard according to the different networking configurations of the corresponding lines of ONU, the weak light relationship of ONU under different devices is analyzed to determine whether there is weak light in the uplink.

[0049] Existing technology 3: Analyze and locate the user's optical attenuation by collecting time-dimensional data and time-dimensional data from the terminal beam splitter.

[0050] In summary, the three existing technologies mentioned above determine whether there is a weak uplink light problem by calculating the ONU optical channel attenuation value based on the collected ONU's transmit and receive power, which is prone to error.

[0051] Existing technology requires staff to go to the site to verify the existence of weak light areas after identifying them, which is labor-intensive and time-consuming.

[0052] In view of this, the weak light segment determination method provided in this application determines the transmission power of the first optical signal sent by the light-emitting module of the OLT, and the receiving power of the first optical signal reflected back to the receiving module of the OLT by the beam splitter connected to the OLT. The weak light segment determination device determines whether the average value of the transmitted power and the received power is less than a first preset threshold. If the average value is less than the first preset threshold, it determines that there is a weak light segment in the transmission path between the OLT and the beam splitter. Compared with the prior art, which is based on the received power of the ONU and calculates the proportion and dispersion of the ONU optical channel attenuation value through an algorithm to determine whether there is a weak light problem in the uplink, there is an error problem. Since the first optical signal is emitted by the light-emitting module of the OLT along the direction of the beam splitter and reflected back to the receiving module of the OLT by the beam splitter, the weak light segment determination device directly determines the signal power of the first optical signal in the reflection process of the uplink transmission, and quickly and accurately determines whether there is an uplink weak light segment in the transmission path between the OLT and the beam splitter by the signal power of the first optical signal in the reflection process of the uplink transmission.

[0053] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0054] Figure 1 This is an architecture diagram of a low-light segment determination system provided in an embodiment of this application. Figure 1 As shown, the weak light segment determination system 10 includes: a weak light segment determination device 101, a data server 102, an optical line terminal 103, a beam splitter 104, and an optical network unit 105.

[0055] The weak light segment determination device 101, data server 102, optical line terminal 103, beam splitter 104, and optical network unit 105 can be one or more, for ease of understanding. Figure 1 Only one is shown in the image.

[0056] The low-light segment determination device 101, data server 102, optical line terminal 103, and optical network unit 105 are connected via a communication link. This communication link can be a wired communication link or a wireless communication link, and this application does not limit it in this regard.

[0057] It should be noted that, as Figure 2 The diagram shows the structure of the optical line terminal 103. The optical line terminal 103 includes a first light-emitting module 1031, a light-receiving module 1032, and a second light-emitting module 1033. The first light-emitting module 1031 is used to emit 1310nm optical signals. The light-receiving module 1032 is used to receive 1310nm optical signals. The second light-emitting module 1033 is used to emit 1490nm optical signals.

[0058] It should be noted that, as Figure 3 The diagram shows the structure of a Passive Optical Network (PON). The PON includes an optical line terminal (OLT) 103, a beam splitter 104, and at least one optical network unit (ONU) 105. The beam splitter 104 is located between the OLT 103 and the at least one ONU 105. The first light-emitting module 1031 of the OLT 103 emits a 1310nm optical signal along the direction of the beam splitter 104, and the beam splitter 104 reflects the 1310nm optical signal back to the receiving module 1032 of the OLT 103. The second light-emitting module 1033 of the OLT 103 emits a 1490nm optical signal along the direction of the beam splitter 104.

[0059] It should be noted that the beam splitter 104 can reflect 1310nm optical signals in one direction and can pass 1490nm optical signals.

[0060] It should be noted that the optical network unit 105 can receive the 1490nm optical signal emitted from the optical line terminal 103 and measure the received power when the optical signal arrives at the optical network unit 105. Then, the optical network unit 105 transmits the received power as a 1310nm optical signal along the direction of the beam splitter 104 to the receiving module 1032 of the optical line terminal 103.

[0061] In one possible implementation, the weak light segment determination device 101 acquires the time T0 when an optical signal is emitted from the light-emitting module of the optical line terminal 103, reflected back to the light-receiving module of the optical line terminal 103 after passing through the beam splitter 104, and the time T1 when the optical signal is emitted from the optical network unit 105 and arrives at the light-receiving module of the optical line terminal 103. The weak light segment determination device 101 calculates the difference between the time T0 / 2 when the optical signal arrives at the beam splitter 104 and the time T1 when the optical signal emitted by the optical network unit 105, which is closest to the optical line terminal 103, arrives at the light-receiving module of the optical line terminal 103, as the transmission time ΔT of the optical signal from the beam splitter 104 to the optical network unit 105. The weak light segment determination device 101 instructs the light-emitting module of the optical line terminal 103 to send an optical signal at a first time point. The weak light segment determination device 101 determines the second time point when the optical network unit 105 sends an optical signal as a time interval T0 / 2 - ΔT + a preset transmission delay after the first time point. The weak light segment determination device 101 instructs multiple optical network units 105 to send optical signals at a second time point.

[0062] In one possible implementation, the weak light segment determination device 101 determines the luminous power of the optical signal at the moment it is emitted from the luminous module of the optical line terminal 103, and determines the luminous power of the optical signal at the moment it arrives at the luminous receiving module of the optical line terminal 103. The weak light segment determination device 101 determines the optical power of the optical signal at the moment it arrives at the beam splitter 104 as the average of the sum of the luminous power and the received power. The weak light segment determination device 101 receives a first preset threshold from the data server 102 and determines whether the average value is less than the first preset threshold. If the average value is less than the first preset threshold, the weak light segment determination device 101 determines that there is a weak light segment in the transmission path between the optical line terminal 103 and the beam splitter 104. If the average value is greater than or equal to the first preset threshold, the weak light segment determination device 101 determines that there is no weak light segment in the transmission path between the optical line terminal 103 and the beam splitter 104.

[0063] In one possible implementation, if the weak light segment determination device 101 determines that there is no weak light segment in the transmission path between the optical line terminal 103 and the optical splitter 104, the weak light segment determination device 101 acquires the received power when the optical signal is received by the optical network unit 105. The weak light segment determination device 101 receives a second preset threshold from the data server 102 and determines whether the received power when the optical signal is received by the optical network unit 105 is less than the second preset threshold. If the received power is less than the second preset threshold, it is determined that there is a weak light segment in the transmission path between the optical splitter 104 and the optical network unit 105.

[0064] In one possible implementation, the weak light segment determination device 101 acquires the received power of the optical signal when it is received by the optical network unit 105. The weak light segment determination device 101 receives a second preset threshold from the data server 102. The weak light segment determination device 101 determines the difference between the received power of the optical signal when it is received by the optical network unit 105 and the optical power of the optical signal at the moment it arrives at the beam splitter 104 as the optical power of the optical signal transmitted from the beam splitter 104 to the optical network unit 105. It then checks whether the optical power of the optical signal transmitted from the beam splitter 104 to the optical network unit 105 is less than the second preset threshold. If the difference between the received power and the optical power at the moment the optical signal arrives at the beam splitter 104 is less than the second preset threshold, then it is determined that a weak light segment exists in the transmission path between the beam splitter 104 and the optical network unit 105.

[0065] In one possible implementation, the data server 102 is used to send a first preset threshold, a second preset threshold, and a third preset threshold to the low-light segment determination device 101.

[0066] When implemented in hardware, the various modules of the low-light segment determination system 10 can be integrated into the low-light segment determination device. Specifically, such as... Figure 4 As shown, the basic hardware structure of the low-light segment determination device is introduced.

[0067] Figure 4 This is a schematic diagram of a low-light segment determination device provided in an embodiment of this application. Figure 4 As shown, the low-light segment determination device includes at least one processor 401, a communication line 402, and at least one communication interface 404, and may also include a memory 403. The processor 401, memory 403, and communication interface 404 can be connected via the communication line 402.

[0068] The processor 401 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application, such as one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs).

[0069] Communication line 402 may include a path for transmitting information between the aforementioned components.

[0070] Communication interface 404 is used to communicate with other devices or communication networks. It can use any transceiver-like device, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.

[0071] The memory 403 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of including or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto.

[0072] In one possible design, the memory 403 can exist independently of the processor 401, meaning the memory 403 can be an external memory of the processor 401. In this case, the memory 403 can be connected to the processor 401 via a communication line 402 to store execution instructions or application code, and its execution is controlled by the processor 401 to implement the low-light segment determination method provided in the following embodiments of this application. In another possible design, the memory 403 can also be integrated with the processor 401, meaning the memory 403 can be an internal memory of the processor 401. For example, the memory 403 can be a cache, which can be used to temporarily store some data and instruction information.

[0073] As one possible implementation, processor 401 may include one or more CPUs, for example Figure 4 CPU0 and CPU1 in the example. As another possible implementation, the low-light segment determination device may include multiple processors, such as... Figure 4 The processors 401 and 407 are included. As another possible implementation, the low-light segment determination device may also include an output device 405 and an input device 406.

[0074] It should be noted that the various embodiments of this application can be referenced or learned from each other. For example, the same or similar steps, method embodiments, system embodiments and device embodiments can be referenced from each other without limitation.

[0075] Figure 5 This is a flowchart illustrating a method for determining a low-light segment as provided in an embodiment of this application. Figure 5 As shown, the method includes the following steps S501-S503. This method is applied to a passive optical network (PON), which includes an optical line terminal (OLT) and a splitter.

[0076] S501, the weak light segment determination device determines the power of the first optical signal transmitted by the light-emitting module of the OLT, and the power of the first optical signal received when it is reflected back to the light-receiving module of the OLT by the beam splitter connected to the OLT.

[0077] For example, taking a 1310nm optical signal as the first optical signal, the OLT's light-emitting module sends a 1310nm optical signal in the direction of the beam splitter. The 1310nm optical signal is reflected back to the OLT's light-receiving module by the beam splitter and is received by the light-receiving module.

[0078] For example, the weak light segment determination device acquires the transmission power of a 1310nm optical signal when it is transmitted from the OLT's light-emitting module to the direction of the beam splitter. The weak light segment determination device acquires the reception power of the 1310nm optical signal when it is received by the OLT's light-receiving module.

[0079] S502, The weak light segment determination device determines whether the average value of the transmitted power and the received power is less than a first preset threshold.

[0080] It should be noted that the physical locations of the OLT's light-emitting module and light-receiving module are the same. Since the first optical signal is transmitted from the OLT's light-emitting module towards the beam splitter, reflected back to the OLT's light-receiving module, and received by the light-receiving module, the transmission distance of the first optical signal from the OLT's light-emitting module to the beam splitter is half the transmission distance from the light-emitting module to the light-receiving module. Therefore, the average of the transmitted power and the received power of the first optical signal is the power of the first optical signal when it reaches the beam splitter.

[0081] For example, taking the average of the emitted power and received power of the 1310nm optical signal as the power of the 1310nm optical signal when it reaches the beam splitter as an example, the weak light end determination device determines whether the power of the 1310nm optical signal when it reaches the beam splitter is less than a first preset threshold.

[0082] S503. If the average value of the weak light segment determination device is less than the first preset threshold, it determines that there is a weak light segment in the uplink path of the PON.

[0083] The uplink path is the transmission path between the OLT and the splitter.

[0084] For example, taking a first optical signal as a 1310nm optical signal, a transmitted power of 6dBm, a received power of 2dBm, and a first preset threshold of 5dBm as an example, the weak light segment determination device determines that the average value of the transmitted power and the received power of the 1310nm optical signal is 4dBm. The weak light segment determination device determines that the average value of the transmitted power and the received power of the 1310nm optical signal, 4dBm, is less than the first preset threshold of 5dBm, and therefore determines that a weak light segment exists in the uplink path of the PON.

[0085] For example, taking a first optical signal as a 1310nm optical signal, a transmitted power of 6dBm, a received power of 4dBm, and a first preset threshold of 5dBm as an example, the weak light segment determination device determines that the average value of the transmitted power and the received power of the 1310nm optical signal is 5dBm. The weak light segment determination device determines that the average value of the transmitted power and the received power of the 1310nm optical signal, 5dBm, is equal to the first preset threshold of 5dBm, and therefore determines that there is no weak light segment in the uplink path of the PON.

[0086] Based on the above technical solution, the weak light segment determination method provided in this application determines the transmission power of the first optical signal sent by the light-emitting module of the OLT, and the receiving power of the first optical signal reflected back to the receiving module of the OLT by the beam splitter connected to the OLT. The weak light segment determination device determines whether the average value of the transmitted power and the received power is less than a first preset threshold. If the average value is less than the first preset threshold, it determines that there is a weak light segment in the transmission path between the OLT and the beam splitter. Compared with the prior art, which is based on the received power of the ONU and calculates the attenuation value of the ONU optical channel to obtain the proportion and dispersion of the ONU and thus determine whether there is a weak light problem in the uplink, there is an error problem. Since the first optical signal is emitted by the light-emitting module of the OLT along the direction of the beam splitter and reflected back to the receiving module of the OLT by the beam splitter, the weak light segment determination device can quickly and accurately determine whether there is an uplink weak light segment in the transmission path between the OLT and the beam splitter by the signal power of the first optical signal during the reflection process in the uplink transmission. Compared to existing technologies that require staff to go to the site to verify the existence of weak light areas after they are identified, resulting in high labor costs and low timeliness, the above-mentioned technical solution can accurately determine the existence of weak light areas, avoiding the step of staff going to the site for verification, greatly reducing labor costs and improving timeliness.

[0087] The following describes the process by which the weak light segment determination device determines the existence of a weak light segment in the downstream path of the target.

[0088] As one possible embodiment of this application, combined with Figure 5 ,like Figure 6 As shown, following S502 above, it can also be implemented through the following S601-S602. The optical transmission network also includes at least one optical network unit (ONU).

[0089] S601. If the average value is greater than or equal to the first preset threshold, the weak light segment determination device determines whether the target ONU is a weak light ONU.

[0090] The target ONU is one of at least one ONU.

[0091] One possible implementation method is as follows: the weak light segment determination device determines whether the target ONU is a weak light ONU through the following process:

[0092] 1. The weak light segment determination device obtains the received power when the second optical signal is received by the target ONU.

[0093] For example, when the second optical signal is a 1490nm optical signal, the 1490nm optical signal is emitted by the second light-emitting module of the OLT along the direction of the beam splitter. The 1490nm optical signal passes through the beam splitter and is transmitted to the target ONU, where it is received. The weak light segment determination device determines the received power when the 1490nm optical signal is received by the target ONU.

[0094] 2. The weak light segment determination device determines whether the received power of the second optical signal received by the target ONU is less than the target threshold.

[0095] For example, consider a 1490nm optical signal received by a target ONU with a received power of 8dBm and a target threshold of 7dBm. The weak light segment determination device determines whether the received power of 8dBm when the optical signal is received by the target ONU is less than the target threshold of 7dBm.

[0096] 3. If the received power of the second optical signal received by the target ONU is less than the target threshold, the weak light segment determination device determines that the target ONU is a weak light ONU.

[0097] For example, taking a 1490nm optical signal received by the target ONU with a received power of 5dBm and a target threshold of 7dBm as an example, the weak light segment determination device determines that the received power of 5dBm when the optical signal is received by the target ONU is less than the target threshold of 7dBm, and thus determines that the target ONU is a weak light ONU.

[0098] 4. If the received power of the second optical signal received by the target ONU is greater than or equal to the target threshold, the weak light segment determination device determines that the target ONU is not a weak light ONU.

[0099] For example, taking a 1490nm optical signal received by the target ONU with a received power of 8dBm and a target threshold of 7dBm as an example, the weak light segment determination device determines that the received power of 8dBm when the optical signal is received by the target ONU is greater than the target threshold of 7dBm, and thus determines that the target ONU is not a weak light ONU.

[0100] S602. If the target ONU is a weak light ONU, the weak light segment determination device determines that there is a weak light segment in the target downstream path of the PON.

[0101] The target downstream path is the transmission path between the optical splitter and the target ONU.

[0102] Based on the above technical solution, the weak light segment determination device determines whether the target ONU is a weak light ONU when the average value is greater than or equal to a first preset threshold. If the target ONU is a weak light ONU, the weak light segment determination device determines that a weak light segment exists in the target downstream path of the PON. The target downstream path is the transmission path between the optical splitter and the target ONU. This technical solution can determine whether a weak light segment exists in the downstream path from the optical splitter to the target ONU by testing whether the target ONU is a weak light ONU, even when no weak light segment exists in the upstream path.

[0103] The following describes a method for determining the weak light problem in the downstream path when there is a weak light problem in the upstream path.

[0104] As one possible embodiment of this application, combined with Figure 5 ,like Figure 7 As shown, following S502 above, it can also be implemented through the following S701-S703. The optical transmission network also includes at least one optical network unit (ONU).

[0105] S701, The weak light segment determination device obtains the receiving power when the second optical signal is received by the target ONU.

[0106] The target ONU is one of at least one ONU.

[0107] For example, when the second optical signal is a 1490nm optical signal, the 1490nm optical signal is emitted by the second light-emitting module of the OLT along the direction of the beam splitter. The 1490nm optical signal passes through the beam splitter and is transmitted to the target ONU, where the target ONU receives the 1490nm optical signal. The weak light segment determination device determines the receiving power of the target ONU when it receives the 1490nm optical signal.

[0108] S702, The weak light segment determination device determines whether the difference between the received power of the second optical signal and the average value is less than a second preset threshold.

[0109] For example, taking a 1310nm optical signal as the first optical signal, the emitted power of the 1310nm optical signal as 6dBm, the received power of the 1310nm optical signal as 2dBm, the received power of the 1490nm optical signal when received by the target ONU as 8dBm, and a second preset threshold as 7dBm as the example: The weak light segment determination device determines that the average value of the emitted power and the received power of the 1310nm optical signal is 4dBm. The weak light segment determination device determines that the difference between the received power of the 1490nm optical signal (8dBm) received by the target ONU and the average value is 4dBm. The weak light segment determination device determines whether the difference of 4dBm is less than the second preset threshold of 7dBm.

[0110] S703. If the difference is less than the second preset threshold, the weak light segment determination device determines that there is a weak light segment in the target downlink path of the PON.

[0111] The target downstream path is the transmission path between the optical splitter and the target ONU.

[0112] For example, taking the case where the difference between the received power of 8dBm and the average value when the 1490nm optical signal is received by the target ONU is 4dBm, and the second preset threshold is 7dBm, the weak light segment determination device determines that the difference is less than the second preset threshold, thereby determining that there is a weak light segment in the target downlink path of the PON.

[0113] Based on the above technical solution, the weak light segment determination device acquires the received power of the second optical signal when it is received by the target ONU, and determines whether the difference between the received power of the second optical signal and the average value is less than a second preset threshold. By calculating the difference between the received power of the second optical signal and the average value, the power of the downstream transmission path from the optical signal to the splitter to the target ONU can be accurately obtained. If the difference is less than the second preset threshold, the weak light segment determination device determines that a weak light segment exists in the target downstream path of the PON. The above technical solution can accurately determine whether a weak light segment exists in the downstream path even when a weak light exists in the upstream path.

[0114] As one possible embodiment of this application, such as Figure 8 As shown, the method by which the weak light segment determination device controls the second optical signal emitted by the ONU to arrive at the splitter later than the time when the splitter reflects the first optical signal can also be implemented through the following S801-S802. The optical transmission network also includes at least one optical network unit (ONU).

[0115] S801, the low-light segment determination device sends the first indication information to the OLT.

[0116] The first indication information is used to instruct the light-emitting module of the OLT to send a first light signal at a first time point.

[0117] For example, taking a light-emitting module with a 1310nm light signal, a first time point of 1s, and a first light signal of 1310nm as an example, the weak light segment determination device sends a first indication message to the OLT, instructing the OLT's 1310nm light signal light-emitting module to send a 1310nm light signal along the direction of the beam splitter in 1s.

[0118] S802, The weak light segment determination device sends a second indication message to each of at least one ONU.

[0119] The second indication information is used to instruct the ONU to send a second optical signal at a second time point. The first time point is before the second time point, and the time interval between the first time point and the second time point is greater than or equal to the first time difference.

[0120] The first time difference is the time difference between the transmission time of the optical signal between the OLT and the splitter and the transmission time of the optical signal between the splitter and the preset ONU. The preset ONU is at least one ONU that is closest to the splitter.

[0121] One possible implementation is that the first time difference T satisfies the following formula:

[0122] T = BC, A ≥ T

[0123] Where A is the time interval between the first time point and the second time point, B is the transmission time of the optical signal between the OLT and the splitter, and C is the transmission time of the optical signal between the splitter and the preset ONU.

[0124] For example, the transmission time of the optical signal between the OLT and the splitter is 1 second, and the transmission time of the optical signal between the splitter and the preset ONU is 4 seconds. The weak light segment determination device determines that the time difference between the 1 second transmission time of the optical signal between the OLT and the splitter and the 4 second transmission time of the optical signal between the splitter and the preset ONU is 3 seconds, that is, the weak light segment determination device determines the first time difference to be 3 seconds.

[0125] For example, taking the first time point as the 1st second. The weak light segment determination device determines the second time point as a time interval of more than 3 seconds after the 1st second, that is, after the 4th second. The weak light segment determination device sends a second indication message to each of the at least one ONU, instructing the ONU to send a second optical signal after the 4th second.

[0126] For example, taking a preset delay compensation of 1 second as the first time point, the weak light segment determination device determines the second time point as the first second, and then after an interval of 3 seconds and the preset delay compensation of 1 second, the fifth second becomes the second time point. The weak light segment determination device sends a second indication message to each of the at least one ONU, instructing the ONU to send a second optical signal at the fifth second.

[0127] Based on the above technical solution, the weak light segment determination device sends a first indication message to the OLT. This first indication message instructs the OLT's light-emitting module to send a first optical signal at a first time point. The weak light segment determination device sends a second indication message to each of the at least one ONU. This second indication message instructs the ONU to send a second optical signal at a second time point. The first time point is before the second time point, and the time interval between the first and second time points is greater than or equal to a first time difference. The first time difference is the time difference between the transmission time of the optical signal between the OLT and the splitter and the transmission time of the optical signal between the splitter and a preset ONU. The preset ONU is the ONU with the shortest distance to the splitter among the at least one ONU. This technical solution can control the arrival time of the optical signal emitted by at least one ONU at the splitter to be later than the arrival time of the first optical signal at the splitter, thereby avoiding interference between the optical signal emitted by at least one ONU and the first optical signal.

[0128] One possible implementation is that the weak light segment determination device determines the transmission distance of the optical signal between the OLT and the beam splitter based on the transmission time of the optical signal between the OLT and the beam splitter, which is the product of the transmission time of the optical signal between the OLT and the beam splitter and a preset optical speed. Alternatively, the weak light segment determination device determines the transmission distance of the optical signal between the beam splitter and a preset ONU based on the transmission time of the optical signal between the beam splitter and the preset ONU, which is the product of the transmission time of the optical signal between the beam splitter and the preset ONU and a preset optical speed.

[0129] For example, assuming the speed of light is 300,000 km / s, and the transmission time of the optical signal between the OLT and the splitter is 1 second, and the transmission time between the splitter and the preset ONU is 4 seconds, the weak light segment determination device determines the transmission distance between the optical signal and the preset ONU based on the 1-second transmission time between the splitter and the preset ONU as the product of the 1-second transmission time and the speed of light 300,000 km / s, i.e., the transmission distance between the optical signal and the preset ONU is determined to be 300,000 km. Similarly, based on the 4-second transmission time between the optical signal and the preset ONU, the device determines the transmission distance between the optical signal and the preset ONU as the product of the 4-second transmission time and the preset speed of light 300,000 km / s, i.e., the transmission distance between the optical signal and the preset ONU is 1,200,000 km.

[0130] This application embodiment can divide the low-light segment determination device into functional modules or functional units according to the above method example. For example, each function can be divided into a separate functional module or functional unit, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or in software functional modules or functional units. The module or unit division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0131] like Figure 9 The diagram shown is a structural schematic of a weak light segment determination device 90 provided in an embodiment of this application. The weak light segment determination device 90 includes a communication unit 901 and a processing unit 902.

[0132] The communication unit 901 is used to determine the transmission power of the first optical signal transmitted by the light-emitting module of the OLT, and the reception power of the first optical signal reflected back to the light-receiving module of the OLT by the optical splitter connected to the OLT; the processing unit 902 is used to determine whether the average value of the transmission power and the reception power is less than a first preset threshold; the processing unit 902 is also used to determine that there is a weak light segment in the uplink path of the PON if the average value is less than the first preset threshold; the uplink path is the transmission path between the OLT and the optical splitter.

[0133] The processing unit 902 is further configured to determine whether the target ONU is a weak light ONU if the average value is greater than or equal to a first preset threshold; the target ONU is one of the at least one ONUs; if the target ONU is a weak light ONU, it is determined that there is a weak light segment in the target downlink path of the PON; the target downlink path is the transmission path between the optical splitter and the target ONU.

[0134] The communication unit 901 is further configured to acquire the received power when the second optical signal is received by the target ONU; the target ONU is one of at least one ONU; the processing unit 902 is further configured to determine whether the difference between the received power of the second optical signal and the average value is less than a second preset threshold; the processing unit 902 is further configured to determine that there is a weak light segment in the target downlink path of the PON if the difference is less than the second preset threshold; the target downlink path is the transmission path between the optical splitter and the target ONU.

[0135] The communication unit 901 is further configured to: send first indication information to the OLT; the first indication information is used to instruct the light-emitting module of the OLT to send a first optical signal at a first time point; send second indication information to each of the at least one ONU; wherein the second indication information is used to instruct the ONU to send a second optical signal at a second time point; the first time point is before the second time point, and the time interval between the first time point and the second time point is greater than or equal to a first time difference; the first time difference is the time difference between the transmission time of the optical signal between the OLT and the splitter and the transmission time of the optical signal between the splitter and a preset ONU; the preset ONU is the ONU with the shortest distance from the splitter among the at least one ONUs.

[0136] The first time difference T satisfies the following formula:

[0137] T = BC, A ≥ T

[0138] Where A is the time interval between the first time point and the second time point, B is the transmission time of the optical signal between the OLT and the splitter, and C is the transmission time of the optical signal between the splitter and the preset ONU.

[0139] In one possible implementation, the weak light segment determination device 90 may further include a storage unit 903. Figure 9 (shown in dashed box) The storage unit 903 stores a program or instruction. When the processing unit 902 executes the program or instruction, the weak light segment determination device 90 can perform the weak light segment determination method described in the above method embodiment.

[0140] Through the above description of the embodiments, those skilled in the art will clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0141] This application provides a computer program product containing instructions that, when run on a computer, cause the computer to execute the weak light segment determination method in the above method embodiments.

[0142] This application also provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the weak light segment determination method in the method flow shown in the above method embodiment.

[0143] The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: electrical connections having one or more wires; portable computer disks; hard disks; random access memory (RAM); read-only memory (ROM); erasable programmable read-only memory (EPROM); registers; hard disks; optical fibers; portable compact disc read-only memory (CD-ROM); optical storage devices; magnetic storage devices; or any suitable combination thereof; or any other form of computer-readable storage medium known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium may also be a component of the processor. The processor and the storage medium may reside in an application-specific integrated circuit (ASIC). In the embodiments of this application, the computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0144] Since the weak light segment determination device, computer-readable storage medium, and computer program product in the embodiments of this application can be applied to the above method, the technical effects that can be obtained can also be referred to the above method embodiments. The embodiments of this application will not be repeated here.

[0145] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0146] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0147] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0148] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for determining a weak light segment, characterized in that, The method is applied in a passive optical fiber network (PON), wherein the PON includes an optical line terminal (OLT), a splitter, and an optical transmission network, and the optical transmission network further includes at least one optical network unit (ONU); the method includes: Determine the emission power of the first optical signal transmitted by the light-emitting module of the OLT, and the reception power of the first optical signal when it is reflected back to the light-receiving module of the OLT by the beam splitter connected to the OLT. Determine whether the average value of the transmitted power and the received power is less than a first preset threshold; If the average value is less than the first preset threshold, it is determined that there is a weak light segment in the uplink path of the PON; the uplink path is the transmission path between the OLT and the splitter. If the average value is greater than or equal to the first preset threshold, and the received power of the second optical signal sent by the light-emitting module of the OLT when it is received by the target ONU is less than the target threshold, the target ONU is determined to be a weak light ONU; the target ONU is one of the at least one ONU. It is determined that there is a weak light segment in the target downstream path of the PON; the target downstream path is the transmission path between the optical splitter and the target ONU.

2. The method according to claim 1, characterized in that, The optical transmission network further includes at least one optical network unit (ONU). After determining whether the average value of the transmitted power and the received power is less than a first preset threshold, the method further includes: The received power when the second optical signal is received by the target ONU is obtained; the target ONU is one of the at least one ONU. Determine whether the difference between the received power of the second optical signal and the average value is less than a second preset threshold. If the difference is less than the second preset threshold, it is determined that there is a weak light segment in the target downlink path of the PON; the target downlink path is the transmission path between the optical splitter and the target ONU.

3. The method according to claim 1, characterized in that, The method further includes: Send a first indication message to the OLT; the first indication message is used to instruct the light-emitting module of the OLT to send the first light signal at a first time point; A second indication message is sent to each of the at least one ONU; wherein the second indication message is used to instruct the ONU to send a second optical signal at a second time point; the first time point is before the second time point, and the time interval between the first time point and the second time point is greater than or equal to a first time difference; the first time difference is the time difference between the transmission time of the optical signal between the OLT and the splitter and the transmission time of the optical signal between the splitter and a preset ONU; the preset ONU is the ONU with the shortest distance from the splitter among the at least one ONUs.

4. The method according to claim 3, characterized in that, The first time difference T satisfies the following formula: T = BC, A ≥ T Where A is the time interval between the first time point and the second time point, B is the transmission time of the optical signal between the OLT and the splitter, and C is the transmission time of the optical signal between the splitter and the preset ONU.

5. A device for determining weak light range, characterized in that, The device includes: a communication unit and a processing unit; The communication unit is used to determine the power of the first optical signal emitted by the light-emitting module of the OLT, and the power of the first optical signal received when it is reflected back to the light-receiving module of the OLT by the beam splitter connected to the OLT. The processing unit is used to determine whether the average value of the transmitted power and the received power is less than a first preset threshold. The processing unit is further configured to determine that there is a weak light segment in the uplink path of the PON if the average value is less than the first preset threshold; the uplink path is the transmission path between the OLT and the optical splitter. The processing unit is further configured to determine that the target ONU is a weak-light ONU if the average value is greater than or equal to the first preset threshold and the received power of the second optical signal sent by the light-emitting module of the OLT when it is received by the target ONU is less than the target threshold; the target ONU is one of the at least one ONU; determine that there is a weak-light segment in the target downstream path of the PON; the target downstream path is the transmission path between the beam splitter and the target ONU.

6. The apparatus according to claim 5, characterized in that, The communication unit is also used to acquire the received power when the second optical signal is received by the target ONU; the target ONU is one of at least one ONU. The processing unit is further configured to determine whether the difference between the received power of the second optical signal and the average value is less than a second preset threshold. The processing unit is further configured to determine that there is a weak light segment in the target downstream path of the PON if the difference is less than the second preset threshold; the target downstream path is the transmission path between the optical splitter and the target ONU.

7. The apparatus according to claim 5, characterized in that, The communication unit is further used for: Send a first indication message to the OLT; the first indication message is used to instruct the light-emitting module of the OLT to send the first light signal at a first time point; A second indication message is sent to each of the at least one ONU; wherein the second indication message is used to instruct the ONU to send a second optical signal at a second time point; the first time point is before the second time point, and the time interval between the first time point and the second time point is greater than or equal to a first time difference; the first time difference is the time difference between the transmission time of the optical signal between the OLT and the splitter and the transmission time of the optical signal between the splitter and a preset ONU; the preset ONU is the ONU with the shortest distance from the splitter among the at least one ONUs.

8. The apparatus according to claim 7, characterized in that, The first time difference T satisfies the following formula: T = BC, A ≥ T Where A is the time interval between the first time point and the second time point, B is the transmission time of the optical signal between the OLT and the splitter, and C is the transmission time of the optical signal between the splitter and the preset ONU.

9. A device for determining weak light range, characterized in that, include: A processor and a communication interface; the communication interface is coupled to the processor, the processor being used to run computer programs or instructions to implement the weak light segment determination method as described in any one of claims 1-4.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed by a computer, perform the weak light segment determination method as described in any one of claims 1-4.

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