Signal rate adjusting system and method

Abstract

The invention provides a signal rate adjusting system and method, the system comprises a media access control (MAC) layer and a passive optical network (PON) system, the PON system comprises an optical network unit (ONU), an optical distribution network (ODN) and an optical line terminal (OLT); wherein the MAC layer is respectively connected with the ONU and the OLT, and is used for periodically detecting an optical link loss value of a link between the ODN and the ONU as well as between the ODN and the OLT under the condition that the ONU communicates with the OLT, and sending alarm information to the ONU based on the optical link loss value; and the ONU is used for adjusting the signal sending rate based on the alarm information. Through the optical link loss value periodically detected by the MAC layer, the change of the optical link loss value of the ODN is sensed, so that the ONU adjusts the signal sending rate according to the change of the optical link loss value, and normal communication of a communication link is ensured.

Description

Technical Field

[0001] This application relates to the field of optical access network technology, and in particular to a signal rate adjustment system and method. Background Technology

[0002] For uplink transmission in Passive Optical Networks (PONs) exceeding 100G, under good conditions of the Optical Distribution Network (ODN), the Optical Network Unit (ONU) can communicate normally with the Optical Line Terminal (OLT), and the OLT can guarantee complete reception of data in both polarization states sent by the ONU.

[0003] However, when the ODN deteriorates, i.e., when link impairments increase within the ODN, the OLT's receiving capability becomes insufficient to simultaneously receive the dual-polarization signals transmitted by the ONU. In this case, adjustments to the ONU are necessary. However, currently there is no relevant mechanism or technology to guide the ONU in adjusting its transmitting end based on the ODN's state.

[0004] Therefore, how the ONU adjusts the transmitting end according to the state of the ODN is a technical problem that needs to be solved for PONs exceeding 100G. Summary of the Invention

[0005] This application provides a signal rate adjustment system and method to solve the problem of how the ONU adjusts the transmitting end according to the state of the ODN.

[0006] This application provides a signal rate modulation system, including: a Media Access Control (MAC) layer and a Passive Optical Network (PON) system. The PON system includes an Optical Network Unit (ONU), an Optical Distribution Network (ODN), and an Optical Line Terminal (OLT). The MAC layer is connected to the ONU and the OLT respectively, and is used to periodically detect the optical link loss value of the link between the ODN and the ONU and the OLT when the ONU and the OLT are communicating, and send alarm information to the ONU based on the optical link loss value. The ONU is used to adjust the rate of signal transmission based on the alarm information.

[0007] According to an embodiment of this application, a signal rate adjustment system is provided in which the optical link loss value is obtained based on the first optical power of the pilot sequence transmitted by the ONU and the second optical power of the pilot sequence received by the OLT.

[0008] According to an embodiment of this application, a signal rate adjustment system is provided, wherein the MAC layer is specifically used to: send alarm information to the ONU based on the difference between the optical link loss value and the initial optical link loss value.

[0009] According to an embodiment of this application, a signal rate adjustment system is provided, wherein the MAC layer is further specifically used to: send alarm information to the ONU when the difference is greater than or equal to a preset threshold.

[0010] According to an embodiment of this application, a signal rate adjustment system is provided, wherein the initial optical link loss value is obtained based on the first optical power and the third optical power of the pilot sequence; the first optical power and the third optical power refer to the optical power of the ONU and the OLT during the initial communication phase.

[0011] According to an embodiment of this application, a signal rate adjustment system is provided, wherein the ONU is further specifically used to: randomly shut down an electrical signal amplifier of a polarization state based on the alarm information, so as to adjust the rate of the transmitted signal.

[0012] This application also provides a signal rate regulation method, applied to any of the signal rate regulation systems described above, including: When the ONU and OLT are communicating, the MAC layer periodically detects the optical link loss value of the link between the ODN and the ONU and the OLT, and sends alarm information to the ONU based on the optical link loss value. The ONU adjusts the rate of signal transmission based on the alarm information.

[0013] This application also provides a signal rate adjustment device, applied to any of the signal rate adjustment systems described above, comprising: The detection module is used to periodically detect the optical link loss value of the link between the ODN and the ONU and the OLT when the ONU and OLT are communicating, and send alarm information to the ONU based on the optical link loss value. An adjustment module is used to adjust the rate of signal transmission based on the alarm information.

[0014] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the signal rate adjustment method as described above.

[0015] This application also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the signal rate regulation method as described above.

[0016] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the signal rate adjustment method as described above.

[0017] This application provides a signal rate adjustment system and method. The system includes a Media Access Control (MAC) layer and a Passive Optical Network (PON) system. The PON system includes an Optical Network Unit (ONU), an Optical Distribution Network (ODN), and an Optical Line Terminal (OLT). The MAC layer is connected to both the ONU and the OLT. When the ONU and OLT are communicating, it periodically detects the optical link loss value of the link between the ODN and both the ONU and OLT, and sends an alarm message to the ONU based on the optical link loss value. The ONU adjusts the transmission signal rate based on the alarm message. By periodically detecting the optical link loss value of the ODN through the MAC layer, changes in the ODN's optical link loss value are sensed, thereby enabling the ONU to adjust the transmission signal rate according to the changes in the optical link loss value, ensuring normal communication of the communication link. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a PON network provided by existing technology.

[0020] Figure 2 This is a schematic diagram of the uplink structure based on intensity modulation and coherent detection provided by existing technology.

[0021] Figure 3 This is a schematic diagram of the signal rate regulation system provided in the embodiments of this application.

[0022] Figure 4 This is a schematic flowchart of the signal rate adjustment method provided in the embodiments of this application.

[0023] Figure 5 This is a schematic diagram of a single-segment ODN failure in the backbone provided in this application.

[0024] Figure 6 This is a schematic diagram of a single-segment ODN failure on a branch provided in an embodiment of this application.

[0025] Figure 7This is a schematic diagram of the signal rate regulation device provided in the embodiments of this application.

[0026] Figure 8 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions 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, 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.

[0028] To provide a clear understanding of the various embodiments of this application, relevant background knowledge will be introduced first.

[0029] Passive Optical Networks (PON) are a type of point-to-multipoint (P2MP) optical transmission system. Figure 1 This is a schematic diagram of the structure of a PON network provided by existing technology, such as... Figure 1 As shown, a PON network generally consists of three parts: an Optical Line Terminal (OLT), an Optical Distribution Network (ODN), and an Optical Network Unit (ONU). The ODN is composed of passive optical devices such as single-mode fiber, optical splitters, and optical connectors, providing the optical transmission medium for the physical connection between the OLT and ONU. Typically, the transmission direction from the OLT to the ONU is defined as downlink, and the transmission direction from the ONU to the OLT is defined as uplink. Currently, single-carrier 50Gb / s PON networks have been standardized. For the evolution of next-generation optical access networks towards 50G PON, multiple international standards organizations, including the International Telecommunication Union Telecommunication Standardization Bureau (ITU-T), are currently promoting the standardization work related to single-carrier speeds exceeding 100Gb / s.

[0030] For PONs exceeding 100G, the uplink direction currently presents significant challenges, yet it remains a key area of ​​research. Currently, a system architecture with considerable potential advantages in the uplink direction... Figure 2 This is a schematic diagram of an uplink structure based on intensity modulation and coherent detection provided by existing technology, such as... Figure 2As shown, on the ONU side, the 4-ary pulse amplitude modulation (PAM4) signal is intensity modulated, then passed through a polarization beam combiner (PBC) and a semiconductor optical amplifier (SOA) before being sent to the ODN for transmission. At the receiving end (i.e., the OLT end), a standard coherent receiver receives the signal. The standard coherent receiver includes a balanced photodetector (BPD) and a double-polarized coherent hybrid (DP-Coh.Hybrid), which together achieve coherent detection. CW represents the continuous wave signal, PBS represents the polarization beam splitter, and LO represents the oscillator.

[0031] Figure 3 This is a schematic diagram of the signal rate regulation system provided in an embodiment of this application, as shown below. Figure 3 As shown, the system includes: a Media Access Control (MAC) layer 301 and a Passive Optical Network (PON) system 302. The PON system 302 includes an Optical Network Unit (ONU) 3021, an Optical Distribution Network (ODN) 3022, and an Optical Line Terminal (OLT) 3023. The MAC layer 301 is connected to the ONU3021 and the OLT3023 respectively, and is used to periodically detect the optical link loss value of the link between the ODN3022 and the ONU3021 and the OLT3023 when the ONU3021 and the OLT3023 are communicating, and send alarm information to the ONU3021 based on the optical link loss value. The ONU3021 is used to adjust the rate of signal transmission based on the alarm information.

[0032] Specifically, when ONU3021 and OLT3023 are communicating, the Optical Path Loss (OPL) detection module in MAC layer 301 periodically detects the optical path loss value of the link between ODN3022 and ONU3021 and OLT3023, and determines whether ODN3022 has deteriorated based on the optical path loss value. That is, when the optical path loss value increases, it indicates that ODN3022 has deteriorated, and when the optical path loss value does not increase, it indicates that ODN3022 has not deteriorated.

[0033] If ODN3022 deteriorates, the ODN status alarm module in MAC layer 301 sends an alarm message to ONU3021; ​​if ODN3022 is not deteriorated, the ODN status alarm module in MAC layer 301 does not send an alarm message to ONU3021. If ODN3022 deteriorates, ONU3021 receives the alarm message and, based on the alarm message, determines that ODN3022 has deteriorated, adjusting the rate of the transmitted signal.

[0034] In this embodiment, the MAC layer 301 periodically evaluates the optical link loss and determines whether the ODN 3022 has deteriorated based on the optical link loss value. This allows the ONU 3021 to adjust the transmission signal rate according to the deterioration of the ODN 3022, i.e., reduce the transmission signal rate to achieve the purpose of speed reduction.

[0035] Optionally, the optical link loss value is obtained based on the first optical power of the pilot sequence transmitted by the ONU and the second optical power of the pilot sequence received by the OLT.

[0036] Specifically, the ONU periodically sends a pilot sequence to the OLT. The first optical power is the transmitted optical power P0 of the pilot sequence, and the second optical power is the received optical power PK of the pilot sequence after transmission through the ODN to the OLT. K represents the current time. Subtracting the first and second optical powers yields the optical link loss value. This optical link loss value can also be stored in the corresponding chip at the MAC layer.

[0037] The signal rate adjustment system provided in this application embodiment includes a Media Access Control (MAC) layer and a Passive Optical Network (PON) system. The PON system includes an Optical Network Unit (ONU), an Optical Distribution Network (ODN), and an Optical Line Terminal (OLT). The MAC layer is connected to both the ONU and the OLT. When the ONU and OLT are communicating, it periodically detects the optical link loss value of the link between the ODN and both the ONU and OLT, and sends an alarm message to the ONU based on the optical link loss value. The ONU adjusts the transmission signal rate based on the alarm message. By periodically detecting the optical link loss value of the ODN through the MAC layer, changes in the ODN's optical link loss value are sensed, thereby enabling the ONU to adjust the transmission signal rate according to the changes in the optical link loss value, ensuring normal communication of the communication link.

[0038] Optionally, the MAC layer is specifically used to: send alarm information to the ONU based on the difference between the optical link loss value and the initial optical link loss value.

[0039] Specifically, the MAC layer determines the difference between the optical link loss value and the initial optical link loss value, where the difference represents the degree of OPL degradation. Based on the difference between the optical link loss value and the initial optical link loss value, the MAC layer can further send alarm information to the ONU.

[0040] In this embodiment, the MAC layer determines the degree of OPL degradation by the difference between the optical link loss value and the initial optical link loss value, and then sends an alarm message to the ONU, so that the ONU adjusts the transmission signal rate according to the change of the optical link loss value to ensure normal communication of the communication link.

[0041] Optionally, the initial optical link loss value is obtained based on the first optical power and the third optical power of the pilot sequence; the first optical power and the third optical power refer to the optical power of the ONU and the OLT during the initial communication phase.

[0042] Specifically, during the initial communication phase between the ONU and the OLT, the ONU sends a pilot sequence to the OLT. The transmitted optical power of the pilot sequence is the first optical power, P0. After transmission through the ODN, the pilot sequence reaches the OLT, at which point the received optical power is the third optical power, P1. Therefore, the initial optical link loss value OPL can be calculated using OPL = P0 - P1. After obtaining the initial OPL, the MAC layer stores it in the corresponding chip for subsequent comparisons to determine whether the OPL has changed.

[0043] Optionally, the MAC layer is further configured to: send an alarm message to the ONU when the difference is greater than or equal to a preset threshold.

[0044] Specifically, the preset threshold is a threshold set according to the actual situation. For example, the preset threshold is 3dB, which means that the signal-to-noise ratio difference between dual-polarization and single-polarization of the same signal in the PON system is 3dB.

[0045] The MAC layer compares the difference with a preset threshold. If the difference is greater than or equal to the preset threshold, it indicates that the OPL has deteriorated or is significantly deteriorated, and the MAC layer can send an alarm message to the ONU.

[0046] Optionally, if the difference is less than a preset threshold, it indicates that the OPL has not deteriorated, and the MAC layer may not send alarm information to the ONU.

[0047] In this embodiment, the MAC layer sends an alarm message to the ONU when the difference between the optical link loss value and the initial optical link loss value is greater than or equal to a preset threshold. This allows the ONU to adjust the transmission rate of the signal according to the change in the optical link loss value, thus ensuring normal communication of the communication link.

[0048] Optionally, the ONU is further configured to: randomly shut down an electrical signal amplifier in a polarization state based on the alarm information, in order to adjust the rate of the transmitted signal.

[0049] Specifically, for ONUs that support dual polarization operation, the signal quality of the two polarization states is essentially the same. Therefore, when the ONU receives an alarm message from the MAC layer, it will randomly shut down the electrical signal amplifier of one polarization state, significantly reducing the amplitude of the transmitted signal of the adjusted polarization state, thereby shutting down the adjusted polarization state and adjusting the transmission signal rate to ensure communication between the ONU and the OLT.

[0050] It should be noted that an electrical signal amplifier refers to the device between the data amplifier and the intensity modulator.

[0051] In this embodiment, the ONU randomly shuts down an electrical signal amplifier in a polarization state via an alarm message to adjust the rate of the transmitted signal and ensure normal communication of the communication link.

[0052] Figure 4 This is a flowchart illustrating the signal rate adjustment method provided in an embodiment of this application, as shown below. Figure 4 As shown, the method is applied to a signal rate regulation system and includes steps 401-402.

[0053] Step 401: When the ONU and OLT are communicating, the MAC layer periodically detects the optical link loss value of the link between the ODN and the ONU and the OLT, and sends alarm information to the ONU based on the optical link loss value.

[0054] Specifically, during the initial communication phase between the ONU and the OLT, the ONU sends a pilot sequence to the OLT. The transmitted optical power of the pilot sequence is the first optical power, P0. After transmission through the ODN, the pilot sequence reaches the OLT, at which point the received optical power is the third optical power, P1. Therefore, the initial optical link loss value OPL can be calculated using OPL = P0 - P1. After obtaining the initial OPL, the MAC layer stores it in its corresponding chip for subsequent comparisons to determine whether the OPL has changed.

[0055] When the ONU and OLT are communicating, the Optical Path Loss (OPL) detection module in the MAC layer periodically detects the optical path loss value of the link between the ODN and the ONU and OLT3023. Based on the optical path loss value, it determines whether the ODN has degraded. If the ODN has degraded, the ODN status alarm module in the MAC layer sends an alarm message to the ONU; if the ODN has not degraded, the ODN status alarm module in the MAC layer does not send an alarm message to the ONU. When the ODN has degraded, the ONU receives the alarm message and, based on the alarm message, determines that the ODN has degraded and adjusts the rate of the transmitted signal.

[0056] In this embodiment, the optical link loss is periodically evaluated by the MAC layer, and the ODN is determined to be degraded based on the optical link loss value. This allows the ONU to adjust the transmission rate of the signal according to the degradation of the ODN, i.e., reduce the transmission rate of the signal to achieve the purpose of speed reduction.

[0057] The ONU periodically sends pilot sequences to the OLT. The first optical power is the transmitted optical power P0 of the pilot sequence, and the second optical power is the received optical power PK of the pilot sequence after transmission through the ODN to the OLT. K represents the current time. Subtracting the first and second optical powers yields the optical link loss value. This optical link loss value can also be stored in the corresponding chip at the MAC layer.

[0058] The MAC layer determines the difference between the optical link loss value and the initial optical link loss value, where the difference represents the degree of OPL degradation. The MAC layer compares the difference with a preset threshold. If the difference is greater than or equal to the preset threshold, it indicates that the OPL has degraded or is significantly degraded, and the MAC layer sends an alarm message to the ONU. If the difference is less than the preset threshold, it indicates that the OPL has not degraded, and the MAC layer does not send an alarm message to the ONU. The preset threshold is set according to actual conditions; for example, a preset threshold of 3dB means that the signal-to-noise ratio difference between dual-polarization and single-polarization signals of the same signal in the PON system is 3dB.

[0059] Step 402: The ONU adjusts the rate of signal transmission based on the alarm information.

[0060] Specifically, for ONUs that support dual polarization operation, the signal quality of the two polarization states is essentially the same. Therefore, when the ONU receives an alarm message from the MAC layer, it will randomly shut down the electrical signal amplifier of one polarization state, significantly reducing the amplitude of the transmitted signal of the adjusted polarization state, thereby shutting down the adjusted polarization state and adjusting the transmission signal rate to ensure communication between the ONU and the OLT.

[0061] It should be noted that an electrical signal amplifier refers to the device between the data amplifier and the intensity modulator.

[0062] The signal rate adjustment method provided in this application involves periodically detecting the optical link loss value of the link between the ODN and the ONU and OLT when communication is occurring between the ONU and OLT at the MAC layer. Based on the optical link loss value, an alarm message is sent to the ONU. The ONU adjusts the transmission signal rate based on the alarm message. By periodically detecting the optical link loss value at the MAC layer, changes in the optical link loss value of the ODN are sensed, thereby enabling the ONU to adjust the transmission signal rate according to the changes in the optical link loss value, ensuring normal communication of the communication link.

[0063] The signal rate adjustment method provided in this application will be described below with two specific embodiments.

[0064] Example 1: Failure of a single segment of the backbone ODN Figure 5 This is a schematic diagram illustrating a fault in a single segment of the backbone ODN provided in an embodiment of this application, as shown below. Figure 5 As shown, an ODN interruption occurs between ONU2 and ONU3. In this scenario, the data sent to the OLT by ONU3 and ONU4 will be affected, resulting in the OLT being unable to receive it completely. However, this does not affect the normal communication between ONU1 and ONU2 and the OLT.

[0065] In this scenario, the OLT will perform a comprehensive analysis of the data received from all ONUs: First, ONU1 and ONU2 can communicate normally with the OLT. According to the topology, the ODN between ONU2 and the OLT is currently functioning correctly. Then, the OLT continues to check the corresponding ODN status of ONU3 and ONU4 according to the topology. Figure 5In the scenario shown, communication between ONU3 and ONU4 and the OLT will be affected. However, since the physical connection location of ONU3 is closer to the OLT than that of ONU4, it can be determined that the ODN link between ONU2 and ONU3 has failed. Therefore, both ONU3 and ONU4 affected by this link need to use signal rate adjustment.

[0066] The MAC layer periodically detects the optical link loss corresponding to the first optical power of the pilot sequence transmitted by ONU3 and ONU4 and the second optical power of the pilot sequence received by the OLT. It determines the difference between the optical link loss value and the initial optical link loss value, and compares the difference with a preset threshold. If the difference is greater than or equal to the preset threshold, an alarm message is sent to ONU3 and ONU4. Based on the alarm message, ONU3 and ONU4 can randomly turn off one polarization state electrical signal amplifier, which significantly reduces the amplitude of the transmitted signal of the adjusted polarization state, thereby achieving the purpose of turning off the adjusted polarization state, adjusting the transmission signal rate, and achieving the purpose of ensuring communication between ONU3 and ONU4 and the OLT.

[0067] Example 2: Single-segment ODN failure on a branch line Figure 6 This is a schematic diagram of a single-segment ODN failure on a branch provided in an embodiment of this application, such as... Figure 6 As shown, the ODN link on one side of ONU2 is interrupted. In this scenario, the data sent by ONU2 to the OLT will be affected, resulting in the OLT being unable to receive it completely. However, this does not affect the normal communication between ONU1, ONU3, and ONU4 and the OLT.

[0068] In this scenario, the OLT will perform a comprehensive analysis of the data received from all ONUs: First, ONU1, ONU3, and ONU4 can communicate normally with the OLT, but ONU2 cannot. Normally, if there is a fault in the main ODN between ONU2 and the OLT, ONU2, ONU3, and ONU4 will all be unable to communicate. However, since ONU3 and ONU4 can communicate normally, it is determined that the tributary fiber of ONU2 is faulty. Therefore, ONU2, affected by this link segment, needs to use signal rate adjustment.

[0069] The MAC layer periodically detects the optical link loss value corresponding to the first optical power value of the pilot sequence transmitted by ONU2 and the second optical power value of the pilot sequence received by OLT, determines the difference between the optical link loss value and the initial optical link loss value, and compares the difference with a preset threshold. If the difference is greater than or equal to the preset threshold, the MAC layer sends an alarm message to ONU2. Based on the alarm message, ONU2 can randomly turn off an electrical signal amplifier of a polarization state, which significantly reduces the amplitude of the transmitted signal of the adjusted polarization state, thereby achieving the purpose of turning off the adjusted polarization state, adjusting the transmission signal rate, and achieving the purpose of ensuring communication between ONU2 and OLT.

[0070] The signal rate adjustment device provided in the embodiments of this application is described below. The signal rate adjustment device described below can be referred to in correspondence with the signal rate adjustment method described above.

[0071] Figure 7 This is a schematic diagram of the signal rate regulation device provided in the embodiments of this application, as shown below. Figure 7 As shown, the signal rate regulation device 700, applied to a signal rate regulation system, includes: a detection module 701 and a regulation module 702; wherein, The detection module 701 is used to periodically detect the optical link loss value of the link between the ODN and the ONU and the OLT when the ONU and the OLT are communicating, and send alarm information to the ONU based on the optical link loss value. The adjustment module 702 is used to adjust the rate of signal transmission based on the alarm information.

[0072] The signal rate adjustment device provided in this application embodiment periodically detects the optical link loss value of the link between the ODN and the ONU and OLT when communication is being conducted between the ONU and OLT, and sends alarm information to the ONU based on the optical link loss value. Based on the alarm information, the transmission signal rate is adjusted. By periodically detecting the optical link loss value, changes in the optical link loss value of the ODN are sensed, thereby adjusting the transmission signal rate according to the changes in the optical link loss value to ensure normal communication of the communication link.

[0073] Figure 8 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 8As shown, the electronic device may include a processor 810, a communications interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communications interface 820, and the memory 830 communicate with each other via the communication bus 840. The processor 810 can call logical instructions in the memory 830 to execute a signal rate adjustment method, which includes: when the ONU and OLT are communicating, the MAC layer periodically detects the optical link loss value of the link between the ODN and the ONU and the OLT, and sends an alarm message to the ONU based on the optical link loss value; the ONU adjusts the rate of signal transmission based on the alarm message.

[0074] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0075] On the other hand, embodiments of this application also provide a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the signal rate adjustment method provided by the above methods. The method includes: when the ONU and OLT are communicating, the MAC layer periodically detects the optical link loss value of the link between the ODN and the ONU and the OLT, and sends an alarm message to the ONU based on the optical link loss value; the ONU adjusts the rate of signal transmission based on the alarm message.

[0076] In another aspect, embodiments of this application also provide a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements a signal rate adjustment method provided by the methods described above. The method includes: when the ONU and OLT are communicating, the MAC layer periodically detects the optical link loss value of the link between the ODN and the ONU and the OLT, and sends an alarm message to the ONU based on the optical link loss value; the ONU adjusts the rate of signal transmission based on the alarm message.

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

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

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

Claims

1. A signal rate regulation system, characterized in that, include: The system includes a Media Access Control (MAC) layer and a Passive Optical Network (PON) system, wherein the PON system comprises an Optical Network Unit (ONU), an Optical Distribution Network (ODN), and an Optical Line Terminal (OLT); wherein... The MAC layer is connected to the ONU and the OLT respectively, and is used to periodically detect the optical link loss value of the link between the ODN and the ONU and the OLT when the ONU and the OLT are communicating, and send alarm information to the ONU based on the optical link loss value. The ONU is used to adjust the rate of signal transmission based on the alarm information.

2. The signal rate regulation system according to claim 1, characterized in that, The optical link loss value is obtained based on the first optical power of the pilot sequence transmitted by the ONU and the second optical power of the pilot sequence received by the OLT.

3. The signal rate regulation system according to claim 1, characterized in that, The MAC layer is specifically used to send alarm information to the ONU based on the difference between the optical link loss value and the initial optical link loss value.

4. The signal rate regulation system according to claim 3, characterized in that, The MAC layer is also specifically used to send alarm information to the ONU when the difference is greater than or equal to a preset threshold.

5. The signal rate regulation system according to claim 3, characterized in that, The initial optical link loss value is obtained based on the first optical power and the third optical power of the pilot sequence; the first optical power and the third optical power refer to the optical power of the ONU and the OLT during the initial communication phase.

6. The signal rate regulation system according to claim 1, characterized in that, The ONU is also specifically used to: randomly shut down an electrical signal amplifier in a polarization state based on the alarm information, so as to adjust the rate of the transmitted signal.

7. A signal rate adjustment method, characterized in that, The signal rate regulation system according to any one of claims 1 to 6 comprises: When the ONU and OLT are communicating, the MAC layer periodically detects the optical link loss value of the link between the ODN and the ONU and the OLT, and sends alarm information to the ONU based on the optical link loss value. The ONU adjusts the rate of signal transmission based on the alarm information.

8. A signal rate adjustment device, characterized in that, The signal rate regulation system according to any one of claims 1 to 6 comprises: The detection module is used to periodically detect the optical link loss value of the link between the ODN and the ONU and the OLT when the ONU and OLT are communicating, and send alarm information to the ONU based on the optical link loss value. An adjustment module is used to adjust the rate of signal transmission based on the alarm information.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the signal rate adjustment method as described in any one of claims 7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the signal rate adjustment method as described in claim 7.

11. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the signal rate adjustment method as described in claim 7.

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