A high-speed ONU optical module switch optical control method and device

Abstract

The present application relates to a high-speed ONU optical module switch optical control method and device, the method comprising: obtaining the delay between the expected on / off light and the actual on / off light according to the original control signal for turning the optical module on / off and the on / off light indication signal fed back by the optical module; outputting an adjustment control signal according to the relationship between the delay and a preset threshold, the adjustment control signal is used to replace the original control signal to control the optical module to turn on or off. The on / off of the optical module of the ONU device can be accurately controlled, so that the overlap of the burst before and after the upstream is not caused on the basis of satisfying the overall burst overhead structure of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of passive optical access network, and in particular to a high-speed ONU optical module switch optical control method and equipment. Background Art

[0002] In the passive optical network (PON) system, the local equipment (OLT), optical distribution network (ODN) and remote equipment (ONU) are networked together to carry services. Among them, for the uplink service carrying, first, the OLT allocates the uplink bandwidth of the ONU in the downlink frame, and specifies the starting position and continuous data length of the ONU uplink burst in the uplink frame structure. Based on this, the ONU turns on the optical module at the specified time and sends the uplink burst. The starting position and continuous data length of the uplink burst are allocated by the OLT, so as to realize the transmission of the uplink service. On the other hand, in the PON system, the OLT and the ONU carry services in the uplink direction in a time-division multiplexing manner, such as Figure 2 As shown in the figure, multiple ONU upstream bursts need to be controlled according to the timing specified by the OLT to avoid conflicts between bursts and disorder of timing relationship. Figure 2 There is an interval between two bursts, which is called guard time (i.e., the time between two PHY bursts of OLT). If there is overlap between the two bursts, it will seriously affect the OLT's synchronization extraction of ONU and the analysis of upstream services.

[0003] For the remote ONU, the structure of a burst is as follows: Figure 3 As shown. The upstream physical synchronization block (PSBu) consists of two parts: the preamble and the delimiter. The length and mode of these two parts are specified by the OLT and are unified in the entire PON optical path. The OLT needs to be able to synchronize the timing of the upper ONU and extract the preamble and delimiter in the upstream physical synchronization block (PSBu) to stabilize the clock and locate the frame header for receiving subsequent key data of the burst. In the remote device ONU, the PON MAC outputs the TX_En control signal to control the light on and off of the ONU optical module to ensure that the burst sent by the ONU meets the timing requirements of the OLT.

[0004] For high-speed PON systems, strict timing relationships are required to maintain stable operation of the system. However, optical devices (optical modules) have their own individual differences, and their light on and light off have different delays, so their performance cannot be exactly the same. In related technologies, the burst overhead structure can support up to 4 preambles. When the performance of the optical module of an individual remote device ONU is slightly poor, a larger burst overhead (such as Figure 3 The length of the Burstmode overhead in the PON system is used to prevent the burst from affecting the upstream burst of other ONU devices, so as to ensure that the burst does not overlap with the upstream burst of other ONU devices before and after. However, since the burst overhead structure is global in the PON system, it will increase the overhead of the entire system and reduce the effective upstream bandwidth. Therefore, due to the strict timing relationship of the upstream burst of the high-speed PON system, the burst overhead is large, which reduces the effective bandwidth of the system; and the performance difference of the optical module of individual ONU devices leads to an increase in the overhead of the entire system or a decrease in the upstream stability of the entire system. In severe cases, the entire PON system cannot work normally. Summary of the invention

[0005] The embodiment of the present invention provides a high-speed ONU optical module switch optical control method and device, which can accurately control the on and off of the optical module of the ONU device, so that the overlap of the upstream front and rear bursts is not caused on the basis of meeting the overall burst overhead structure of the system.

[0006] On the one hand, an embodiment of the present invention provides a high-speed ONU optical module switch optical control method, characterized in that it includes:

[0007] Obtain the delay between the expected on / off light and the actual on / off light according to the original control signal for turning the light module on / off and the on / off light indication signal fed back by the light module;

[0008] An adjustment control signal is output according to the relationship between the delay condition and a preset threshold value, and the adjustment control signal is used to replace the original control signal to control the optical module to turn on or off.

[0009] In some embodiments, it also includes:

[0010] After outputting the adjustment control signal for a burst, obtaining an on / off light indication signal fed back by an optical module corresponding to the burst;

[0011] The delay of the corresponding burst is determined based on the original control signal corresponding to the burst and the indication signal corresponding to the burst, and an adjustment control signal corresponding to the next burst is output according to the relationship between the delay of the corresponding burst and a preset threshold in the next burst.

[0012] In some embodiments, the method of obtaining the delay between the expected on / off light and the actual on / off light according to the original control signal for turning the light module on / off and the actual on / off light indication signal of the light module comprises the steps of:

[0013] Determine the original control signal according to the start and end time of a burst;

[0014] After outputting the original control signal to the optical module, a corresponding indication signal is obtained;

[0015] The delay of the burst is determined based on the original control signal and the corresponding indication signal.

[0016] In some embodiments, determining the delay of the burst based on the original control signal and the corresponding indication signal comprises the steps of:

[0017] The original control signal and the corresponding indication signal are subjected to an XOR operation to obtain an actual on / off optical delay value of the optical module.

[0018] In some embodiments, the step of outputting an adjustment control signal according to a relationship between the delay condition and a preset threshold comprises the following steps:

[0019] If the actual on / off optical delay value of the optical module corresponding to the current burst does not exceed the preset threshold, the original control signal of the next burst is directly output as the adjustment control signal;

[0020] If the actual on / off optical delay value of the optical module corresponding to this burst exceeds the preset threshold, the adjustment time unit is designed according to the actual on / off optical delay value of the optical module corresponding to this burst and the preset threshold, and an adjustment control signal is issued in advance of the adjustment time unit based on the original control signal of the next burst.

[0021] In some embodiments, the step of adjusting the time unit according to the actual on / off optical delay value of the optical module corresponding to the current burst and the preset threshold design includes the following steps:

[0022] The difference between the on / off light delay value and the preset threshold is multiplied by an adjustment coefficient to obtain the adjusted time unit, and the adjustment coefficient has a value range of (0, 1).

[0023] In some embodiments, the step of adjusting the time unit according to the actual on / off optical delay value of the optical module corresponding to the current burst and the preset threshold design includes the following steps:

[0024] The on / off light delay value is used as the adjustment time unit.

[0025] In some embodiments, the preset threshold is determined by a transmission interference warning or a window drift of the corresponding ONU.

[0026] In some embodiments, the preset threshold is determined by a protection time.

[0027] On the other hand, an embodiment of the present invention also provides a device, characterized in that the device includes: at least one processor; and a memory coupled to the at least one processor, the memory containing instructions stored therein, and the instructions are loaded and executed by the processor to implement a method as described in any one of the method embodiments.

[0028] The embodiment of the present invention provides a high-speed ONU optical module switch optical control method and device. In order to maintain the high efficiency and low overhead of the high-speed PON system, and ensure that the entire system can still work stably and normally under the condition of individual ONU performance differences, the embodiment of the present invention accurately controls the on and off of the PON optical module of the ONU device, so that on the basis of meeting the overall burstoverhead structure of the system, the overlap of the upstream front and rear bursts is not caused, resulting in the inability of OLT synchronization or frame delimitation, affecting the operation of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic flow chart of a high-speed ONU optical module switch optical control method provided by an embodiment of the present invention;

[0031] Figure 2 A timing relationship diagram of an uplink burst provided by an embodiment of the present invention;

[0032] Figure 3 A structural diagram of an uplink burst provided by an embodiment of the present invention;

[0033] Figure 4 A timing diagram of the ONU optical module provided in an embodiment of the present invention;

[0034] Figure 5 A schematic diagram of a high-speed ONU optical module switch optical control modularization provided by an embodiment of the present invention;

[0035] Figure 6 A schematic diagram of a specific control process after turning off the light provided by an embodiment of the present invention;

[0036] Figure 7 A schematic diagram of a specific control process after switching on provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1 As shown, an embodiment of the present invention provides a high-speed ONU optical module switch optical control method, characterized in that it includes:

[0039] S100: Obtaining the delay between the expected on / off light and the actual on / off light according to the original control signal for turning the light module on / off and the on / off light indication signal fed back by the light module;

[0040] S200: Outputting an adjustment control signal according to the relationship between the delay condition and a preset threshold, wherein the adjustment control signal is used to replace the original control signal to control the optical module to turn on or off.

[0041] It should be noted that, in general, the original control signal that turns the optical module on / off refers to the control signal output by the PON MAC (Passive Optical Network Media Access Control) to the ONU optical module to turn on / off the light.

[0042] It is understandable that for a single ONU device, Figure 4 As shown in the figure, when the control signal TX_En (original control signal) output by the PON MAC controls the turning on of the ONU optical module, if the light-emitting delay time of the optical module is too large, it will affect the normal output of the burst overhead, causing the OLT to be unable to synchronize normally to the ONU upstream burst or unable to delimit the frame header information; or after TX_En controls the light to be turned off, the optical module still leaks light for a long time, which will cause optical signal conflicts in the upstream optical link and affect the normal detection of the next burst.

[0043] The embodiments of the present invention take into account that with the external influences such as usage time, environment or temperature, the PON optical module, especially the high-speed PON optical module, has a greater impact, causing its performance to deteriorate, resulting in a gradual delay in the light-on and light-off time of the optical module, and the delay time will gradually increase with the degree of degradation. During this period, although the function of the optical module is basically normal, its performance gradually decreases. The degradation of the performance of an ONU optical module may cause the failure of the entire PON system. By outputting an adjustment control signal to replace the original control signal for light-on or light-off control, the light-on and light-off of the PON optical module of the ONU device can be accurately controlled, so that on the basis of meeting the overall burst overhead structure of the system, it does not cause the overlap of the upstream front and rear bursts, resulting in the OLT being unable to synchronize or frame delimit, affecting the operation of the entire system.

[0044] Some embodiments also include:

[0045] S300: After outputting the adjustment control signal for a burst, obtaining an on / off light indication signal fed back by an optical module corresponding to the burst;

[0046] S400: Determine the delay of the corresponding burst based on the original control signal of the corresponding burst and the indication signal of the corresponding burst, and output an adjustment control signal corresponding to the next burst according to the relationship between the delay of the corresponding burst and a preset threshold in the next burst.

[0047] It can be understood that in this embodiment, the adjustment control signal is determined based on the previous burst and then applied to the current burst, and then the adjustment control signal corresponding to the current burst is determined through the feedback indication signal, and this is repeated until the delay meets the demand. This embodiment takes into account the problem of burst overlap before and after the uplink due to environmental influences, performance degradation or performance differences of the optical module, and proposes a solution for continuously adjusting the delay based on the timing relationship.

[0048] In some embodiments, S100 includes the steps of:

[0049] S110: Determine the original control signal according to the start and end time of a burst;

[0050] S120: Outputting the original control signal to the optical module and obtaining a corresponding indication signal;

[0051] S130: Determine a delay of the burst based on the original control signal and the corresponding indication signal.

[0052] It is understandable that if Figure 4As shown, if the original control signal is recorded as TX_En, the moment when TX_En changes from a high level to a low level indicates the starting point of light emission, and the moment when TX_En changes from a low level to a high level indicates the starting point of light-off; the time from the starting point of light emission to the time when each device inside the optical module actually displays the data on the optical link through the light power can be marked as Ton, and the time from the starting point of light-off to the time when each device inside the optical module has no light power can be marked as Toff; the light-emitting indication signal fed back by the optical module can be recorded as Tx_SD, and the time period from TX_En jumping to Tx_SD changing from a low level to a high level is marked as Ti_on, and the time period from TX_En jumping to Tx_SD changing from a high level to a low level is Ti_off. Therefore, the delay determined in this embodiment can be reflected by the Ton or Toff value (the Ton or Toff value can be obtained by actual measurement).

[0053] Preferably, when determining the delay of the burst based on the original control signal and the corresponding indication signal in S130, the original control signal and the corresponding indication signal can be subjected to an XOR operation to measure the actual on / off optical delay value of the optical module. In this embodiment, the actual on / off optical delay value of the optical module is the Ton or Toff value.

[0054] In some embodiments, outputting an adjustment control signal according to a relationship between the delay condition and a preset threshold in S200 includes the steps of:

[0055] S210: If the actual on / off optical delay value of the optical module corresponding to the current burst does not exceed the preset threshold, the original control signal of the next burst is directly output as the adjustment control signal;

[0056] S220: If the actual on / off optical delay value of the optical module corresponding to this burst exceeds the preset threshold, an adjustment time unit is designed according to the actual on / off optical delay value of the optical module corresponding to this burst and the preset threshold, and an adjustment control signal is issued in advance of the adjustment time unit based on the original control signal of the next burst.

[0057] It can be understood that in S210, the original control signal of the next burst is directly output as the adjustment control signal, which means that the delay condition is met at this time, and no additional adjustment is performed, and the original control signal can be directly output to the optical module. In S220, the adjustment time unit is a time interval. After the start and end time of the next burst (i.e., the time when the original control signal is sent) is determined, the time when the original control signal is sent is used as a reference, and a time interval (adjustment time unit) is advanced and the adjustment control signal is sent at this time point. The adjustment control signal replaces the original control signal to pull the level from low to high (control off the light) or from high to low (control on the light).

[0058] In some embodiments, when the adjustment time unit is designed in S220 according to the actual on / off light delay value of the optical module corresponding to this burst and the preset threshold, the difference between the on / off light delay value and the preset threshold can be multiplied by the adjustment coefficient as the adjustment time unit, and the value range of the adjustment coefficient is (0,1]. It can be understood that the preset threshold can be taken separately for the process of turning on / off the light. The preset threshold for the turning on process can be set to the turning on preset threshold, and the preset threshold for the turning off process can be set to the turning off preset threshold.

[0059] Preferably, when the coefficient is 0.5, the adjustment time unit is set to half of (Toff-Td_off), where Toff is the light-off delay value (which can be obtained through actual measurement) and Td_off is the light-off preset threshold. When the coefficient is 1, the adjustment time unit is set to (Toff-Td_off).

[0060] In some embodiments, when the adjustment time unit is designed in S220 according to the actual on / off light delay value of the optical module corresponding to this burst and the preset threshold, the on / off light delay value is directly used as the adjustment time unit. That is, in some more radical adjustment strategies, the adjustment time unit can be directly set to the on / off light delay value, for example, in the light off control, the adjustment time unit is set to Toff.

[0061] In some embodiments, the preset threshold is determined by the transmission interference warning (TIWi) or window drift (DOWi) of the corresponding ONU; it can also be determined by the guard time. It should be noted that TIWi, DOWi, and guard time are system-internal setting values ​​and can be set by the system in the ONU. Since it reflects the impact of the system on the drift of the burst in the optical link or the conflict (overlap) of the previous and next bursts on the transmission quality, when setting it, the overhead can be minimized to increase the uplink effective bandwidth without affecting the transmission quality.

[0062] like Figure 4 , Figure 5As shown, in a specific embodiment, the switch optical control is implemented in the control logic of the PON MAC. The original control signal TX_En of the PON MAC to control the ONU optical module to turn on and off the light is introduced into the logic control block, and the light indication signal Tx_SD fed back by the optical module is also introduced into the logic control block. The Tx_En of the PON MAC controls the switch enable of the optical module (low effective). Ideally, after the rising edge of Tx_En is pulled up, the optical module should appear in the optical link without light. However, in actual applications, optical devices have the process of turning on and off. In 50G ONU, Toff is generally required to be within 128ns. If the performance of the optical module deteriorates due to temperature or other reasons, or the performance of the optical module is different, causing Toff to exceed the guard time, it will overlap with the subsequent burst appearing on the optical link, affecting the leading and delimiting of the next burst of the optical link.

[0063] like Figure 6 As shown, the specific light-off control process is as follows:

[0064] S01: Set the preset light-off threshold Td_off, which can be determined by the TIWi or DOWi threshold, or set by the system itself, such as 1 / 2 of the guard time, or 2 / 3, and jump to S02;

[0065] S02: Calculate the start and end time of the burst according to PON MAC, that is, determine the time when the original control signal Tx_En changes from low to high, so as to determine the time when the original control signal Tx_En of this burst is sent, and jump to S03;

[0066] S03: Assuming that no adjustment is required, the logic control block outputs Tx_En as the adjustment control signal Tx_Ctl. After the logic control block detects the indication signal Tx_SD fed back by the optical module, it compares it with the Tx_En signal, that is, it detects whether the actual light-off process is consistent with the expected light-off process. Specifically, the logic control block can measure the Toff value (delay value) of the actual light module turning off the light through the XOR method of Tx_SD and Tx_En, and check whether the Toff value exceeds Td_off. If not, jump to S04, if yes, jump to S05;

[0067] S04: The TX_En output of a subsequent burst is directly output to the optical module as Tx_Ctl, that is, the process of pulling up Tx_Ctl from low to high in a subsequent burst is the same as the process of pulling up Tx_En, and the process returns to S03;

[0068] S05: Apply the delay value (Toff value) to the next burst; specifically, calculate the adjustment time unit Toff_cut based on the Toff value and the Td_off value, and output a level-raising signal from low to high in advance of Toff_cut based on the Tx_En sending time of the next burst, and jump to S06;

[0069] S06: Obtain Tx_SD fed back by the burst optical module and determine the Toff value of this burst according to Tx_En of this burst, and adjust S07;

[0070] S07: Check whether the Toff value of this burst exceeds Td_off. If not, jump to S04. If yes, jump to S05.

[0071] It should be noted that the XOR method described in S03 includes: in a logic circuit, through an XOR gate circuit, its two inputs are Tx_SD and Tx_En, and the signal output after passing through the gate circuit is Toff. The measurement time is determined according to how many clock pulses the output signal lasts, and each clock pulse is known in the circuit, that is, the delay time can be obtained. Specifically, in the process of turning off the light, the jump from low to high of Tx_En is used as a trigger condition, and the time (clock pulse) Toff when Tx_En^TX_SD (XOR) is 0 is measured.

[0072] It should be noted that, in step S05, the method for determining the Toff_cut value includes: making the Toff_cut value equal to 1 / 2 of (Toff-Td_off), or making Toff_cut equal to (Toff-Td_off), or making the Toff_cut value equal to the Toff value.

[0073] It should be noted that, when determining the Toff value of the current burst according to Tx_En of the current burst in S06, the XOR method as described in S03 may be used.

[0074] like Figure 7 As shown in the figure, the specific opening control process is as follows:

[0075] S11: Set the preset threshold Td_on for switching on. Td_on can be determined by the TIWi or DOWi threshold, or the system can set it by itself, and jump to S12;

[0076] S12: Calculate the start and end time of the burst according to PON MAC, that is, determine the time when the original control signal Tx_En changes from high to low, so as to determine the time when the original control signal Tx_En of this burst is sent, and jump to S13;

[0077] S13: Assuming that no adjustment is required, the logic control block outputs Tx_En as the adjustment control signal Tx_Ctl. After the logic control block detects the indication signal Tx_SD fed back by the optical module, it compares it with the Tx_En signal, that is, it detects whether the actual opening process is consistent with the expected opening process. Specifically, the logic control block can measure the Ton value (delay value) of the actual opening of the optical module by using the XOR method with Tx_SD and Tx_En, and check whether the Ton value exceeds Td_on. If not, jump to S14, if yes, jump to S15;

[0078] S14: The TX_En output of a subsequent burst is directly output to the optical module as Tx_Ctl, that is, the process of pulling down Tx_Ctl from high to low in a subsequent burst is the same as the process of pulling down Tx_En, and the process returns to S13;

[0079] S15: Apply the delay value (Ton value) to the next burst; specifically, calculate the adjustment time unit Ton_cut based on the Ton value and the Td_on value, and output a level pull-down signal from high to low in advance of Ton_cut based on the Tx_En sending time of the next burst, and jump to S16;

[0080] S16: Obtain Tx_SD fed back by the burst optical module and determine the Ton value of this burst according to Tx_En of this burst, and adjust S17;

[0081] S17: Check whether the Ton value of this burst exceeds Td_on. If not, jump to S14. If yes, jump to S15.

[0082] It should be noted that, in step S15, the method for determining the Ton_cut value includes: making the Ton_cut value equal to 1 / 2 of (Ton-Td_on), or making Ton_cut equal to (Ton-Td_on), or making the Ton_cut value equal to the Ton value.

[0083] It can be understood that the XOR method described in S13 is similar to that in S03. In the switching process, the jump from high to low of Tx_En is used as a trigger condition, and the time (clock pulse) Ton when Tx_En^TX_SD (XOR) is 0 is measured;

[0084] It should be noted that, when determining the Toff value of the current burst according to Tx_En of the current burst in S16, the XOR method described in S13 may be used for determination.

[0085] The above-mentioned light-off control processing process and light-on control processing process correspond to the process of pulling Tx_En from low to high, and correspond to the process of the logic control block controlling the light-off and light-on of the optical module.

[0086] The above logic control block can be placed in the PON MAC control logic, in the optical module device or in other logic devices of the ONU device.

[0087] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In a hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable storage medium, which may include a computer-readable storage medium (or a non-transitory medium) and a communication medium (or a temporary medium).

[0088] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0089] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A high-speed ONU optical module switch optical control method, characterized in that: It includes: Obtain the delay between the expected on / off light and the actual on / off light according to the original control signal for turning the light module on / off and the on / off light indication signal fed back by the light module; Outputting an adjustment control signal according to the relationship between the delay condition and a preset threshold, wherein the adjustment control signal is used to replace the original control signal to control the light module to turn on or off; The step of outputting an adjustment control signal according to the relationship between the delay condition and a preset threshold comprises the following steps: If the actual on / off optical delay value of the optical module corresponding to the current burst does not exceed the preset threshold, the original control signal of the next burst is directly output as the adjustment control signal; If the actual on / off optical delay value of the optical module corresponding to this burst exceeds the preset threshold, the adjustment time unit is designed according to the actual on / off optical delay value of the optical module corresponding to this burst and the preset threshold, and an adjustment control signal is issued in advance of the adjustment time unit based on the original control signal of the next burst.

2. The high-speed ONU optical module switch optical control method as claimed in claim 1, characterized in that: Also includes: After outputting the adjustment control signal for a burst, obtaining an on / off light indication signal fed back by an optical module corresponding to the burst; The delay of the corresponding burst is determined based on the original control signal corresponding to the burst and the indication signal corresponding to the burst, and an adjustment control signal corresponding to the next burst is output according to the relationship between the delay of the corresponding burst and a preset threshold in the next burst.

3. The high-speed ONU optical module switch optical control method as claimed in claim 1, characterized in that: The method of obtaining the delay between the expected on / off light and the actual on / off light according to the original control signal for turning the light module on / off and the actual on / off light indication signal of the light module comprises the following steps: Determine the original control signal according to the start and end time of a burst; Outputting the original control signal to the optical module and obtaining a corresponding indication signal; The delay of the burst is determined based on the original control signal and the corresponding indication signal.

4. The high-speed ONU optical module switch optical control method as described in claim 3 is characterized in that: The method of determining the delay of the burst based on the original control signal and the corresponding indication signal comprises the steps of: The original control signal and the corresponding indication signal are subjected to an XOR operation to obtain an actual on / off optical delay value of the optical module.

5. The high-speed ONU optical module switch optical control method as claimed in claim 1, characterized in that: The step of adjusting the time unit according to the actual on / off optical delay value of the optical module corresponding to the current burst and the preset threshold value comprises the following steps: The difference between the on / off light delay value and the preset threshold is multiplied by an adjustment coefficient to obtain the adjusted time unit, and the adjustment coefficient has a value range of (0, 1).

6. The high-speed ONU optical module switch optical control method as claimed in claim 1, characterized in that: The step of adjusting the time unit according to the actual on / off optical delay value of the optical module corresponding to the current burst and the preset threshold value comprises the following steps: The on / off light delay value is used as the adjustment time unit.

7. The high-speed ONU optical module switch optical control method as claimed in claim 1, characterized in that: The preset threshold is determined by a transmission interference warning or a window drift of the corresponding ONU.

8. The high-speed ONU optical module switch optical control method as claimed in claim 1, characterized in that: The preset threshold is determined by the protection time.

9. A device, characterized in that: The device comprises: at least one processor; and a memory coupled to the at least one processor, wherein the memory contains instructions stored therein, and the instructions are loaded and executed by the processor to implement the method according to any one of claims 1 to 8.

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