CN108631864B - BURST drift detection method and device - Google Patents

Abstract

This paper discloses a burst BURST drift detection method and device, including: generating bandwidth mapping BWMAP information; for allocated bandwidth time slots, detecting alarm events and recording the alarm information of each BURST; according to the bandwidth mapping BWMAP information and Alarm information, analyze the abnormal situation of each BURST, and obtain the drift detection result of the BURST. The present application realizes the detection of excessive drift of the ONU BURST in the PON system.

Description

A kind of BURST drift detection method and device

technical field

The invention relates to the field of optical communication, in particular to a BURST drift detection method and device.

Background technique

In the Gigabit-Capable Passive Optical Network (GPON, Gigabit-Capable Passive Optical Network) and 10-Gigabit Gigabit Passive Optical Network (XGPON, XG-Passive Optical Network) protocols, the uplink uses time division multiplexing (TDM) to transmit data, The burst (BURST) of each optical network unit (ONU) has a separate time slot, as shown in (1) in Figure 1, and the dynamic bandwidth allocation (DBA) does not Sufficient time is reserved between the same time slots to ensure that the laser of the previous ONU is turned off and the laser of the next ONU is turned on, and a period of time is also reserved for each other's ONUs not to emit light. This entire period of time is called the protection time ( guardtime).

However, in practical engineering applications, with the change of temperature and the performance of the laser itself, the upstream BURST will drift in a small range (relative to the start time (starttime) before and after). If the drift range is smaller than the ONUi Transmission Interference Warning (TIWi, ONUi Transmission Interference Warning) and ONUi Drift of Window (DOWi, ONUi Drift of Window) alarm thresholds specified in the protocol, the optical line terminal (OLT, optical line terminal) will not receive any Influence; if the drift range is greater than the alarm threshold, TIWi and DOWi alarms will be generated, and the OLT needs to re-measure the ONU or directly kick the ONU and re-register.

The above drift conditions are still within the controllable range, because although the BURST drifts, the OLT can still be delimited to the delimter within the normal windowing range, so that the OLT can immediately and clearly perceive whether the An ONU is abnormal. However, if the BURST of an ONU drifts greatly, the front and rear drift range exceeds the OLT windowing range, or even the drift is larger than the guardtime, it will affect one or more adjacent ONUs, resulting in rogue ONU behavior. As shown in Fig. 1, drift (2) and drift (3) are cases where the forward drift is too large, and drift (4) and drift (5) are cases where the backward drift is too large.

At this time, the OLT sees that multiple ONUs are abnormal, and cannot accurately determine which ONU has the problem. Since an ONU with excessive drift does not always emit light for a long time, the OLT cannot accurately identify the behavior of the ONU by the method of long emission detection. It is difficult for the related art to detect the excessive BURST drift. Therefore, a BURST drift detection solution suitable for a passive optical network (PON, Passive Optical Network) system is required to solve this problem.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, embodiments of the present invention provide a BURST drift detection method and device.

This application provides the following solutions:

A burst pulse BURST drift detection method, comprising:

Generate bandwidth mapping BWMAP information;

For the allocated bandwidth time slot, detect the alarm event of each BURST and record the alarm information;

According to the BWMAP information and the alarm information, the abnormal situation of each BURST is analyzed, and the drift detection result of the BURST is obtained.

Among them, it also includes: for the unallocated bandwidth time slot, monitoring the upstream GPON transmission convergence layer GEM frame header data by means of blind scanning, and recording the searched port address number port_id information;

Analyzing the abnormal conditions of each BURST according to the BWMAP information and the alarm information, and obtaining the drift detection result of the BURST, includes: analyzing the abnormal conditions of each BURST according to the BWMAP information, the alarm information and the port_id information, and obtaining the BURST drift detection results.

The recording of the alarm information of each BURST includes: continuously storing the alarm information in the alarm information storage table based on the sequence of the BURSTs.

Wherein, the alarm information includes at least one of the following:

Inter-bit parity;

Delimited success indication;

signal loss;

Frame loss.

The recording of the searched port_id information includes: storing the port_id information in a monitoring information storage table.

Wherein, analyzing the abnormal situation of each BURST according to the BWMAP information and the alarm information, and obtaining the drift detection result of the BURST, includes: according to the BWMAP information, and the alarm information storage table and the monitoring information storage table. The recorded information is analyzed to analyze the abnormal situation of each BURST, and the drift detection result of the BURST is obtained.

Wherein, the drift detection result of the BURST includes one of the following:

The port_id of the BURST that drifts when the drift affects adjacent ONUs and the ONU to which it belongs;

The port_id of the BURST that causes the drift when the drift affects multiple non-adjacent ONUs;

When there is one ONU long-lighting, the ONU belonging to the BURST that normally receives data is the long-lighting ONU.

A burst pulse BURST drift detection device, comprising:

A dynamic bandwidth allocation module for generating bandwidth mapping BWMAP information and sending it to the uplink data receiving module;

The uplink data receiving module is used to detect the alarm event of each BURST and record the alarm information for the allocated bandwidth time slot;

The analysis module is configured to analyze the abnormal situation of each BURST according to the BWMAP information and the alarm information, and obtain the drift detection result of the BURST.

Wherein, the dynamic bandwidth allocation module is further configured to send the bandwidth mapping BWMAP information to the blind scan monitoring module;

Described blind scan monitoring module is used for undistributed bandwidth time slot, monitors the upstream GPON transmission convergence layer GEM frame header data by the mode of blind scan, and the port address number port_id information searched is recorded;

The analysis module is specifically configured to analyze the abnormal situation of each BURST according to the BWMAP information, the alarm information and the port_id information, and obtain the drift detection result of the BURST.

The method further includes: an alarm information storage module, configured to continuously store the alarm information in the alarm information storage table based on the sequence of BURST.

Wherein, the alarm information includes at least one of the following:

Inter-bit parity;

Delimited success indication;

signal loss;

Frame loss.

The monitoring information storage module is configured to store the port_id information in the monitoring information storage table.

The analysis module is specifically configured to analyze the abnormal situation of each BURST according to the bandwidth mapping BWMAP information and the information recorded in the alarm information storage table and the monitoring information storage table, and obtain the drift detection result of the BURST .

Wherein, the drift detection result of the BURST obtained by the analysis module includes one of the following:

The port_id of the BURST that drifts when the drift affects adjacent ONUs and the ONU to which it belongs;

The port_id of the BURST that causes the drift when the drift affects multiple non-adjacent ONUs;

When there is one ONU long-lighting, the ONU belonging to the BURST that normally receives data is the long-lighting ONU.

The embodiments of the present invention provide a BURST drift detection method and device, which realize the detection of excessive BURST drift of an ONU in a PON system, so that the OLT can quickly locate the faulty ONU, so that the PON system can resume normal operation as soon as possible when the ONU is abnormal.

Other features and advantages of the present invention will be set forth in the description which follows, and, in part, will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the description, claims and drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the specification. They are used to explain the technical solutions of the present invention together with the embodiments of the present application, and do not limit the technical solutions of the present invention.

FIG. 1 is a schematic diagram of a common BURST forward and backward drift scenario in the related art;

Fig. 2 is the schematic flowchart of the BURST drift detection method in the present application;

3 is a schematic diagram of the composition of the BURST drift detection device in the present application;

4 is a schematic diagram of a BURST drift scenario where ONU drift affects multiple non-adjacent ONUs;

Fig. 5 is the schematic diagram of the BURST drift scene of ONU long luminescence;

FIG. 6 is a schematic flowchart of a specific implementation example of the BURST drift detection method of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other if there is no conflict.

The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that herein.

As shown in Figure 2, the present application provides a BURST drift detection method, comprising:

Step 101, generating bandwidth mapping BWMAP information;

Step 102, for the allocated bandwidth time slot, detect the alarm event of each BURST and record the alarm information;

Step 103, according to the BWMAP information and the alarm information, analyze the abnormal situation of each BURST, and obtain the drift detection result of the BURST.

In this application, it can be determined whether the bandwidth time slot has been allocated according to the BWMAP information. In step 102, for the normal allocated bandwidth time slot, the method of monitoring and capturing alarm events may be adopted, and the alarm information of each BURST may be recorded in the alarm information storage table, and the alarm information may include bip error, sync, los and lof, etc., and can also record the error information of GEM HEC comparison and Ethernet packet Cyclic Redundancy Check (CRC, Cyclic Redundancy Check) in each BURST. In this way, by reading the information in the alarm information storage table, the BURST drift situation can be roughly analyzed according to the abnormal situation before and after the BURST, and the ONU where the BURST drift occurs can be located. In practical applications, the GEM HEC compares the CRC error information of the Ethernet packet, which can play an auxiliary analysis role to confirm whether the BURST really has a bit error. In general, referring to bip error is enough, but bip error also has a certain probability of false positives. At this time, it is possible to confirm whether the "BURST drift detection result obtained according to bip error" can be based on the GEM HEC check and the CRC error information of the Ethernet packet. precise.

Because the BURST drift situation is very complex, this method alone cannot fully confirm the drift situation, especially in the scenario where multiple BURSTs have large drift, the following methods need to be used for auxiliary analysis at the same time. Before step 103, the above method may further include: monitoring the GEM frame header data of the upstream GPON transmission convergence layer by means of blind scanning for the unallocated bandwidth time slot, and recording the searched port address number port_id information. Here, the abnormal situation of each BURST can be analyzed according to the BWMAP information, the alarm information and the port_id information, so as to obtain the drift detection result of the BURST.

Specifically, according to the BWMAP information, the upstream unassigned bandwidth time slot (including the guardtime between BURSTs) is identified, and the upstream data is monitored blindly in the unassigned bandwidth time slot without searching for the GPON Transmission Convergence (GTC, GPON Transmission Convergence layer). Layer) delimiter frame header, and directly perform the verification analysis of the GPON encapsulation mode (GEM, GPONEncapsulation_Method) frame header. If the hybrid error correction (HEC, Hybrid Error Correction) check is normal, the port address number (port_id) information is stored in the monitoring information storage table, and the current superframe counter time and intraframe counter time are recorded at the same time. In this way, by reading the information in the monitoring information storage table, combined with the BWMAP information allocated by Dynamic Bandwidth Allocation (DBA, Dynamic Bandwidth Allocation), and the mapping information between the allocation identifier (alloc_id) and port_id, some BURST can also be analyzed. , locate the ONU with BURST drift. In practical applications, the superframe counter time and the intraframe counter time are used to record the time information when the port_id is detected, and the location where the BURST drift occurs can be determined according to the superframe counter time and the intraframe counter time.

In practical applications, when the PON port is fully configured, there is no extra unallocated bandwidth time slot. At this time, if the existing network conditions permit, you can close some ONU time slots and set aside more time slots for port_id information monitoring. .

In the present application, analyzing the abnormal situation of each BURST to obtain the drift detection result of the BURST means: analyzing the abnormal situation of each BURST, and locating the ONU where the BURST drift occurs. In practical applications, under different drift conditions, it is possible to analyze which BURSTs have drifted according to the alarm information storage table and the monitoring information storage table, and determine which ONUs these BURSTs correspond to, so as to locate the ONUs that have BURST drifts.

In practical applications, when the OLT receives uplink data, there are generally four main alarm events as follows. Correspondingly, the alarm information of this application also mainly includes the following four types:

1) Bit Interleaved Parity (bip error, Bit Interleaved Parity): indicates that there is a bit error in the BURST data, and the parity result of the recalculation of the received data does not match the BIP field in the GTC frame structure.

2) Delimitation success indication (sync, synchronize): Indicates that the delimiter delimter of a BURST is successfully delimited.

3) Loss of frame (lof, loss of frame): Indicates that the delimiter delimter of a BURST is not delimited, but there is light input to the optical module within the windowed range.

4) Loss of signal (los, loss of signal): Indicates that the optical module has no optical input when the OLT is opening the window and delimiting.

In the present application, the above four types of alarm information may be mainly stored in the alarm information storage table, and the alarm information of each BURST may be continuously stored in the alarm information storage table based on the sequence of the BURSTs. The storage method and storage format of the alarm information in the alarm information storage table can be selected according to the actual situation.

For example, the OLT can continuously store the above four kinds of alarm information of each BURST in a block of RAM. Of course, the OLT can also continuously store the above-mentioned four alarm information of multiple BURSTs in a block of RAM and classify them according to the different BURSTs to which they belong. In this regard, this article does not limit.

For example, the storage format of the alarm information storage table may take the form shown in Table 1. Of course, in practical applications, the storage format of the alarm information storage table may also take other forms, which are not limited in this article.

Alloc_id Onu_id Bip_err sync lof los 1 1 0 1 0 0 2 2 0 1 0 0

Table 1

As shown in Table 1, the alloc_id and onu_id correspond to the bwmap table information allocated by the DBA. In the alarm information, 1 indicates that an alarm event has occurred, and 0 indicates that an alarm event has not occurred. The depth setting of the RAM should be larger than the maximum number of transmission containers (TCONT, Transmission Container) that the OLT can support, covering the boundary conditions of the DBA cycle. The HEC error of the GEM frame header and the CRC error information of the Ethernet packet are not described in this embodiment.

In this application, when the correct GEM frame header is parsed during blind scan monitoring, the corresponding port_id is stored in the monitoring information storage table. The following table 2 is an example of the monitoring information storage table. In the monitoring information storage table, except for records The port_id fingerprint can also record the super frame counter (Supercnt) and the intra frame counter (Innercnt) at the current moment at the same time.

Port_id Supercnt Innrcnt 0x400 0x3FE 0x007F

Table 2

In practical applications, the drift detection result of BURST described in this application may include one of the following:

1) The port_id of the BURST that drifts when the drift affects adjacent ONUs and the ONU to which it belongs;

2) The port_id of the BURST that causes the drift when the drift affects multiple non-adjacent ONUs;

3) The ONU belonging to the BURST that normally receives data when there is one ONU glows for a long time is the ONU that glows for a long time.

The BURST drift detection method in this application is suitable for GPON and XGPON systems, and two analysis methods that need to work together are introduced: one is to detect BURST alarm events and store the corresponding alarm information; the other is to blindly scan and monitor The module monitors the upstream GEM frame header data by blind scanning in the unallocated bandwidth time slot, and stores the searched port_id and other information. In this way, in the drift detection process, the above two methods can verify each other and can improve the BURST drift detection. 's accuracy.

As shown in Figure 3, the present application also provides a BURST drift detection device, which may include:

Dynamic bandwidth allocation module 201, for generating bandwidth mapping BWMAP information and sending it to the uplink data receiving module;

The uplink data receiving module 202 is used to detect the alarm event of each BURST and record the alarm information for the allocated bandwidth time slot;

The analysis module 206 is configured to analyze the abnormal situation of each BURST according to the BWMAP information and the alarm information, and obtain the drift detection result of the BURST.

In addition, it may also include: a blind scan monitoring module 204, configured to monitor the upstream GPON transmission convergence layer GEM frame header data by means of blind scan for unallocated bandwidth time slots, and to search for the port address number port_id information record. Here, the dynamic bandwidth allocation module 201 can also be configured to send the bandwidth mapping BWMAP information to the blind scan monitoring module; the analysis module 206 can be specifically configured to, according to the BWMAP information, the alarm information and the port_id information, Analyze the abnormal situation of each BURST, locate the ONU with BURST drift, and obtain the BURST drift detection result.

In addition, the above apparatus may further include: an alarm information storage module 203, configured to continuously store the alarm information in the alarm information storage table based on the order of BURST.

In addition, the above apparatus may further include: a monitoring information storage module 205, configured to store the port_id information in the monitoring information storage table.

In an implementation manner, the process of cooperatively implementing BURST detection among various modules in the above-mentioned BURST drift detection device of the present application is as follows:

The dynamic bandwidth allocation module 201 generates bandwidth map (Bandwidth Map, BWMAP) information and sends it to the uplink data receiving module 202 and the blind scan monitoring module 204, respectively.

The uplink data receiving module 202 records the alarm information of each BURST in the alarm information storage table of the alarm information storage module 203 by adopting the method of monitoring and capturing alarm events for the normal allocated bandwidth time slot, and the alarm information may include bip error , sync, los and lof, etc., and can also record the GEM HEC and Ethernet packet Cyclic Redundancy Check (CRC, Cyclic Redundancy Check) error information in each BURST. The analysis module 206 reads the information in the alarm information storage table of the alarm information storage module 203, and can roughly analyze the drift of the BURST according to the abnormal conditions of the BURST before and after.

The blind-scan monitoring module 204 identifies the upstream unassigned bandwidth time slot (including guardtime between BURSTs) according to the BWMAP information, and blindly scans and monitors the upstream data in the unassigned bandwidth time slot, without searching for the GPON transmission convergence layer (GTC, GPON Transmission Convergence Layer) delimiter frame header, and directly perform the verification and analysis of the GPON encapsulation mode (GEM, GPONEncapsulation_Method) frame header. If the hybrid error correction (HEC, Hybrid Error Correction) is normal, the port_id information is stored in the monitoring information storage table of the monitoring information storage module 205, and the current superframe counter time and Intra frame counter time. The analysis module 206 can read the information of the monitoring information storage table in the monitoring information storage module 205, and in combination with the above-mentioned BWMAP information and the mapping information of the allocation identifier (alloc_id) and the port_id, it can also analyze the drift of some BURSTs and locate them. ONUs with BURST drift.

In practical applications, there is a correspondence between port_id, alloc_id, and onu_id (representing the ONU identifier), and the OLT can obtain it by looking up the table. It can also be configured by the OLT after it is obtained from other devices.

In the present application, the analysis module 206 analyzes the abnormal situation of each BURST, and obtains the drift detection result of the BURST, which means: analyze the abnormal situation of each BURST, and locate the ONU in which the BURST drift occurs. In practical applications, under different drift conditions, it is possible to analyze which BURSTs have drifted and which ONUs these BURSTs correspond to according to the alarm information storage table and the monitoring information storage table, so as to locate the ONUs that have BURST drift.

In practical applications, the BURST drift detection method of the present application may be performed by an OLT, and the BURST drift detection device may be provided in the OLT, or may be implemented by the OLT. The present application can be applied to systems such as GPON and XGPON, and certainly can also be applied to other similar systems, which is not limited herein.

In practical applications, the related traditional positioning methods require several hours of positioning time. If the situation is complicated, engineers need to check one by one at the user's home, which often takes longer. With the detection of this application, the problem ONU can be automatically located within a few minutes.

The following example illustrates how to analyze and identify several common drift scenarios in combination with the contents of the alarm information storage table and the monitoring information storage table to implement BURST drift detection. Here, a detailed description is given by taking the example that the drift before and after the BURST affects the adjacent ONU, the non-adjacent ONU, and the identification of the ONU's long emission.

Example 1

In this embodiment, the detection and analysis process in which the drift affects adjacent ONUs is described in detail.

According to this alarm information storage table, various drift situations can be analyzed. The information listed in Table 1 is the data when BURST1 and BURST2 are normally received, the delimiter can be found, and there is no bip error.

Alloc_id Onu_id Bip_err sync lof los 1 1 0 1 0 0 2 2 0 0 1 0

table 3

When the drift (2) in FIG. 1 occurs, the content of the alarm information table is as shown in Table 3. Among them, BURST1 receives normal, BURST2 has lof due to forward drift, but because the drift is less than guard_time, the drift of ONU2 only affects its own service interruption. In this case, the BURST2 frame header part falls within the unassigned time slot, and the port_id of BURST2 can be monitored.

Table 4

When the drift (3) in FIG. 1 occurs, the content of the alarm information table is as shown in Table 4. Among them, BURST2 has drifted to the end of BURST1, so that BURST1 can be successfully delimited, but a bip error occurs; while BURST2 has lof, and ONU2's own services are interrupted. In this case, although the BURST2 frame header overlaps with BURST1, there is a segment in the middle of BURST2 in the unallocated bandwidth time slot, and the blind scan monitoring module has a certain probability to search for the port_id.

Alloc_id Onu_id Bip_err sync lof los 1 1 0 0 0 1 2 2 0 1 0 0

table 5

When the drift (4) in FIG. 1 occurs, the content of the alarm information table is as shown in Table 5. Backward drift occurs in BURST1, the OLT search delimiter window cannot detect optical input, and a los alarm is generated. However, since the drift is less than guard_time, the normal reception of BURST2 is not affected. In this case, the tail of BURST1 is in the unassigned time slot, and the blind scan monitoring module can search for the port_id.

Alloc_id Onu_id Bip_err sync lof los 1 1 0 0 0 1 2 2 0 0 1 0

Table 6

When the drift (5) in FIG. 1 occurs, the content of the alarm information table is as shown in Table 6. Among them, the backward drift of BURST1 is too large. In addition to generating a los alarm, the tail of BURST1 overlaps with the head of BURST2, resulting in a lof alarm that cannot be delimited by BURST2. In this case, the middle section of BURST1 is in the unassigned time slot, and the blind scan monitoring module can search for port_id.

Embodiment 2

The method of the present application is still effective in the case where the drift affects multiple ONUs, or even multiple rogue ONUs exist at the same time. In this embodiment, the detection and analysis process in which the drift affects multiple non-adjacent ONUs is described in detail.

As shown in FIG. 3 , BURST4 drifts forward between BURST1 and BURST2, and the content of the alarm information storage table is shown in Table 7. Among them, BURST1 and BURST2 both belong to ONU1, and the method of the present application is also applicable to a situation where one ONU has multiple BURSTs.

Alloc_id Onu_id Bip_err sync lof los 1 1 1 1 0 0 2 1 0 0 1 0 3 2 0 1 0 0 4 3 0 0 0 1 5 4 0 1 0 0

Table 7

In the above table, although BURST1 can be delimited, but the tail is covered by BURST4, so a bip error occurs; the head of BURST2 is covered by BURST4, so the delimiter is not delimited and lof appears; BURST3 is not affected and can be synced normally; BURST4 Due to a large amount of drift, no light input can be detected in the search window, resulting in los; BURST5 can receive normally. The blind scan monitoring module searches for the port_id belonging to BURST4 in the guardtime idle time slot between BURST1 and BURST2, which can accurately indicate that the behavior in the alarm information storage table is caused by BURST4.

Embodiment 3

The present application can also be used for long luminescence detection, provided that there is only one ONU long luminescence. In this embodiment, the long luminescence detection and analysis process is described in detail.

As shown in Figure 4, ONU4 normally emits light in its own BWMAP time slot, but it also lights up in other ONU time slots. As a result, all other ONUs are disconnected, and only itself is online. Generally, in this situation, only ONU4 is online on the network element. It is not certain that ONU4 is a long-light ONU. It can only be analyzed by querying the alarm information storage table.

Alloc_id Onu_id Bip_err sync lof los 1 1 0 0 1 0 2 2 0 0 1 0 3 3 0 0 1 0 4 4 0 1 0 0 5 5 0 0 1 0

Table 8

In the above table, only BURST4 can receive data normally, and the other four BURSTs are covered by light all the time, and all have lof alarms. In this case, it can be basically determined that the ONU4 has long luminescence. To be on the safe side, it can also be combined with the long luminescence detection function of the OLT for repeated confirmation.

Since the data of the long glow is random, the blind scan monitoring module generally cannot search for the port_id.

In practical applications, the above method of the present application can be implemented by a software program. For example, the above method of the present application can be implemented by the software flow shown in FIG. 6 . The software flow shown in FIG. 6 adopts the method of cyclic grabbing and setting trigger conditions to realize the BURST drift detection of the present application, and accurately grabs before the failure occurs. abnormal data, the detection results are more accurate. Of course, other software programs may also be used in practical applications to implement the method of the present application, which is not limited herein.

The software flow shown in FIG. 6 will be described in detail below.

As shown in Figure 6, the detection process of BURST drift can include:

Step 600, obtain the BWMAP entry, and determine whether the current time slot has been allocated in the BWMAP entry; if the current time slot has been allocated in the BWMAP entry, the upstream data receiving module performs bip error, sync, los when the capture enable is turned on. and lof and other alarm analysis, and record the alarm information obtained by the alarm analysis in the alarm information storage table. When the capture is disabled, the uplink data receiving module does not write the alarm information storage table; if the current time slot is in the BWMAP entry If it is not allocated, the blind scan monitoring module will continue to detect the GEM frame header information in this data, and store the port_id and other information in the GEM frame header that is correctly checked by HEC in the monitoring information storage table when the capture enable is turned on. , the blind scan monitoring module does not write to the monitoring information storage table when the grab enable is turned off.

Step 601, configure whether to grab circularly (GRAB_CIRCLE_EN), grab condition (GRAB_TYPE) and grab enable (GRAB_EN);

Step 602, determine whether the grab enable (GRAB_EN) is turned on, if so, continue to step 603, otherwise return to step 601;

Step 603, read the captured data from the alarm information storage table and the monitoring information storage table;

Step 604, analyzing and processing the captured data to obtain a detection result of BURST drift;

Specifically, the relevant information of the BWMAP entry, the alarm information storage table, and the monitoring information storage table can be combined to read the data therein and perform analysis and processing to obtain and output the BURST detection result.

Step 605, output the detection result.

It should be noted that, in this example, step 600 may be continuously performed during the execution of steps 601 to 605 . When the grab condition is satisfied, the hardware part (the part in the dashed box in Figure 6) will automatically end grab and clear GRAB_EN to 0. The software program (the execution flow on the right side in FIG. 6 ) waits for the capture to end, and then reads the data in the alarm information storage table and the monitoring information storage table.

In the live network environment, when a project failure occurs, it is generally static monitoring data, and it is difficult to infer various abnormal conditions at the moment before the failure based on these printing statistics. In the present application, the abnormal data at the moment before the fault occurs is stored in the alarm information storage table.

In this example, the cyclic grab enable (GRAB_CIRCLE_EN) can be set, that is, when an alarm storage table is filled, it can return to the initial address and continue to overwrite and write until the grab enable (GRAB_EN) is turned off. The closing method of grab enable can be configured by yourself. You can turn off grab enable manually or through software control method. For example, grab condition (GRAB_TYPE) can be set, when some kind of failure occurs , if the grab condition (GRAB_TYPE) is met, the grab will be automatically ended and the abnormal data will be latched. In practical applications, the crawling conditions can be customized according to user needs, corresponding to different codes. For example, if you need to set the condition to "end the crawl when los occurs in BURST", you can configure GRAB_TYPE as 0001, so that when a matching condition occurs (that is, los appears in BURST) and waits for a certain period of time, the crawl will be automatically ended and the abnormal data will be deleted. latched.

The following table 9 is the configuration information of cyclic grab enable (GRAB_CIRCLE_EN), grab enable (GRAB_EN), grab condition (GRAB_TYPE), etc. in the process shown in FIG. 6 .

Table 9

In practical applications, certain engineering events can be repeatedly confirmed and analyzed by multiple grabbing methods, and the grabbing conditions can also be flexible and diverse, and can be configured in a targeted manner in combination with specific events.

In addition, an embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions, which implement the BURST drift detection method when the computer-executable instructions are executed.

Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic Various media that can store program codes, such as discs or optical discs.

Optionally, in this embodiment, the processor executes the method steps of the foregoing embodiments according to program codes stored in the storage medium.

Optionally, for specific examples in this embodiment, reference may be made to the examples described in the foregoing embodiments and optional implementation manners, and details are not described herein again in this embodiment.

Those of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing relevant hardware (such as a processor) through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk or an optical disk Wait. Optionally, all or part of the steps in the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above-mentioned embodiments can be implemented in the form of hardware, for example, an integrated circuit to implement its corresponding function, or it can be implemented in the form of a software function module, for example, a program stored in a memory is executed by a processor. / directive to implement its corresponding function. The present application is not limited to any particular form of combination of hardware and software.

The above shows and describes the basic principles and main features of the present application and the advantages of the present application. The present application is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only describe the principles of the present application. Without departing from the spirit and scope of the present application, the present application will also have various changes and improvements. These changes and improvements are within the scope of the claimed application.

Claims (12)

1. A BURST drift detection method, comprising:

generating bandwidth mapping BWMAP information;

detecting an alarm event of each BURST and recording alarm information aiming at the allocated bandwidth time slot;

analyzing the abnormal condition of each BURST according to the BWMAP information and the alarm information to obtain a drift detection result of the BURST;

monitoring GEM frame header data of an uplink GPON transmission convergence layer in a blind scanning mode aiming at unallocated bandwidth time slots, and recording port address number port _ id information which is searched;

and analyzing the abnormal condition of each BURST according to the BWMAP information, the alarm information and the port _ id information to obtain the drift detection result of the BURST.

2. The method of claim 1, wherein the recording the alarm information of each BURST comprises:

and continuously storing the alarm information in an alarm information storage table based on the sequence of the BURST.

3. The method of claim 2, wherein the alert information includes at least one of:

inter-bit parity checking;

delimiting a success indication;

loss of signal;

the frame is lost.

4. The method of claim 1, wherein the recording the searched port _ id information comprises:

and storing the port _ id information in a monitoring information storage table.

5. The method according to any one of claims 2 to 3, wherein the analyzing the abnormal condition of each BURST according to the BWMAP information and the alarm information to obtain the drift detection result of the BURST comprises:

and analyzing the abnormal condition of each BURST according to the BWMAP information and the information recorded in the alarm information storage table and the monitoring information storage table to obtain the drift detection result of the BURST, wherein the monitoring information storage table is used for storing the searched port _ id information.

6. The method of claim 5, wherein the drift detection of the BURST comprises one of:

port _ id of BURST drifting when drifting affects adjacent ONU and ONU to which the BURST belongs;

port _ id of BURST causing drift when the drift affects a plurality of non-adjacent ONUs;

and when one ONU emits light for a long time, the ONU which normally receives the BURST of the data belongs to is the ONU emitting light for a long time.

7. A BURST drift detection apparatus, comprising:

the dynamic bandwidth allocation module is used for generating bandwidth mapping BWMAP information and sending the bandwidth mapping BWMAP information to the uplink data receiving module;

the uplink data receiving module is used for detecting an alarm event of each BURST and recording alarm information aiming at the allocated bandwidth time slot;

the analysis module is used for analyzing the abnormal condition of each BURST according to the BWMAP information and the alarm information to obtain the drift detection result of the BURST;

the dynamic bandwidth allocation module is further configured to send the bandwidth mapping BWMAP information to a blind scan monitoring module;

the blind scanning monitoring module is used for monitoring GEM frame header data of an uplink GPON transmission convergence layer in a blind scanning mode aiming at the time slot without the allocated bandwidth, and recording the searched port address number port _ id information;

the analysis module is specifically configured to analyze an abnormal condition of each BURST according to the BWMAP information, the alarm information, and the port _ id information, so as to obtain a drift detection result of the BURST.

8. The BURST drift detection device of claim 7, further comprising:

and the alarm information storage module is used for continuously storing the alarm information in an alarm information storage table based on the sequence of the BURST.

9. The BURST drift detection device of claim 8, wherein the alarm information comprises at least one of:

inter-bit parity checking;

delimiting a success indication;

loss of signal;

the frame is lost.

10. The BURST drift detection device of claim 7, further comprising:

and the monitoring information storage module is used for storing the port _ id information in a monitoring information storage table.

11. BURST drift detection device according to any one of claims 8 to 9,

the analysis module is specifically configured to analyze an abnormal condition of each BURST according to the bandwidth map BWMAP information and information recorded in the alarm information storage table and the monitored information storage table, so as to obtain a drift detection result of the BURST, where the monitored information storage table is used to store the searched port _ id information.

12. The BURST drift detection device according to claim 11, wherein the drift detection result of the BURST obtained by the analysis module includes one of:

port _ id of BURST drifting when drifting affects adjacent ONU and ONU to which the BURST belongs;

port _ id of BURST causing drift when the drift affects a plurality of non-adjacent ONUs;

and when one ONU emits light for a long time, the ONU which normally receives the BURST of the data belongs to is the ONU emitting light for a long time.

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