WO2013097196A1

WO2013097196A1 - Method, device and system for detecting transmission link

Info

Publication number: WO2013097196A1
Application number: PCT/CN2011/085079
Authority: WO
Inventors: 魏纵横; 张航
Original assignee: 京信通信系统（中国）有限公司
Priority date: 2011-12-30
Filing date: 2011-12-30
Publication date: 2013-07-04
Also published as: CN104012020A

Abstract

Disclosed are a method, a device and a system for detecting a transmission link. The method comprises: in each preset time period, when it is detected that a receiving terminal receives data from the transmission link to be detected, performing a cyclic redundancy check CRC on the data received; and when the CRC result is incorrect, adding a preset value to an error counting value; and when the error counting value after the addition of the preset value is not less than a preset threshold, then sending out a transmission link adjusting instruction to indicate that the transmission link to be detected needs to be adjusted. The solution can monitor the quality of the transmission link in real time, and thereby can promptly discover a failure in the transmission link and solve the failure in time, which ensures the stability of the transmission link.

Description

Transmission link detection method, device and system

Technical field

The present invention relates to the field of communications technologies, and in particular, to a transmission link detection method, apparatus, and system.

BACKGROUND In the field of communications, a Cyclic Redundancy Check (CRC) is a commonly used error detection method. The basic principle is: The transmitting end performs frame check coding on a data code in a data frame, and The result of the encoding is added to the end of the data frame as a CRC check code and transmitted to the receiving end along with the data frame. After receiving the data frame with the CRC check code, the receiving end encodes the data code in the data frame in the same manner, and the obtained encoded result is compared with the data frame check code part. If they are consistent, the transmission is considered to be transmitted. Correct, otherwise it is considered that an error occurred in the transmission. With the continuous development of Ethernet technology, the network transmission rate continues to increase. At present, Gigabit Ethernet has developed into a mainstream network technology, which can provide lGbps communication bandwidth and can adapt to the ever-expanding network bandwidth requirements of users. However, in the specific application process, the high transmission rate of Gigabit Ethernet and the complex environment of the transmission link affect the stability of signal transmission. However, the existing transmission technology solidifies the timing of the transmission link, cannot monitor the transmission of the transmission link in real time, and cannot adjust the transmission link in real time, thereby failing to ensure the stability of the Gigabit Ethernet transmission.

In summary, the prior art lacks a method capable of real-time monitoring of the transmission shield of the transmission link. SUMMARY OF THE INVENTION Embodiments of the present invention provide a transmission link detection method, apparatus, and system for real-time monitoring of a transmission shield of a transmission link.

The technical solution provided by the embodiment of the present invention includes:

A transmission link detection method includes: performing cyclic redundancy check CRC on received data when detecting that the receiving end receives data through the to-be-detected transmission link in each set time period; When the result is incorrect, the error count value is increased by the set value; when the error count value after the set value is increased is not less than the set threshold, the transmission link adjustment instruction is issued to indicate that the to-be-detected transmission link needs to be adjusted. .

A transmission link detection method includes, when each time period is detected, when the receiving end receives data through the to-be-detected transmission link, increasing the count value of the received data times for characterizing the number of times of receiving data The first set value; and performing cyclic redundancy check CRC on the received data; when the CRC result is incorrect, increasing the error count value to the second set value; receiving data according to adding the first set value Determining whether to issue a transmission link adjustment according to the determined error rate according to the determined bit error rate and the error count value after adding the second set value The instruction indicates that the transmission link to be detected needs to be adjusted.

A transmission link detecting apparatus, comprising: a cyclic redundancy check unit, configured to perform, on a received time period, a received data when detecting that the receiving end receives data through the to-be-detected transmission link Cyclic redundancy check CRC; error counting unit, configured to increase the error count value by a set value when the CRC result is incorrect; and transmit a shield amount determining unit for adding the set value in the error technical unit When the error count value is not less than the set threshold, issuing a transmission link adjustment instruction indicates that the to-be-detected transmission link needs to be adjusted.

A transmission link detecting apparatus, comprising a cyclic redundancy check unit, configured to represent the received data when detecting that the receiving end receives data through the to-be-detected transmission link in each set time period set The number of received data counts of the number of times is increased by the first set value; and the cyclic redundancy check CRC is performed on the received data; the error count unit is configured to increase the error count value by the second when the CRC result is incorrect. a set value; a bit error rate determining unit, configured to determine a bit error rate of the transmission link according to the count value of the received data number after adding the first set value and the error count value after adding the second set value; And a quantity determining unit, configured to determine, according to the determined error rate, whether to issue a transmission link adjustment instruction to indicate that the to-be-detected transmission link needs to be adjusted.

A transmission link detection system includes: a transmitting end for transmitting data, a receiving end for receiving data, and a transmission link detecting device; and the transmission link detecting device includes the above-described transmission link detecting device.

The method and device for detecting a transmission link according to an embodiment of the present invention, when the receiving end receives the data through the to-be-detected transmission link in each set time period, the method repeatedly performs redundancy on the received data. The check CRC; when the CRC result is incorrect, the error count value is increased by the set value; when the error count value after the set value is increased is not less than the set threshold, the transmission link adjustment instruction is issued to indicate the to-be-detected The transmission link needs to be adjusted. The scheme determines the transmission shield of the transmission link by detecting the error count value of the data received within the set time period, and can set the length of the time period as needed, and when the data is received, the data can be CRC Verification, to determine the error count value, so as to achieve the purpose of monitoring the transmission shield of the transmission link in real time, once it is determined that the error count value reaches the set threshold, it can be determined that the transmission link is faulty, because the transmission link is monitored in real time. Therefore, the fault of the transmission link can be found in time, and the fault can be eliminated in time, which ensures the stability of the transmission link. DRAWINGS

1 is a flowchart of a method for detecting a transmission link by using an error count value according to an embodiment of the present invention; FIG. 2 is a flowchart of a method for detecting a transmission link by using a bit error rate according to an embodiment of the present invention;

3 is a schematic structural diagram of an apparatus for detecting a transmission link by using an error count value according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of an apparatus for detecting a transmission link by using a bit error rate according to an embodiment of the present invention; FIG. 5 is a schematic structural diagram of a transmission link detection system according to an embodiment of the present invention. The embodiment of the present invention provides a method for detecting a transmission link, and the process of the method is as shown in FIG. 1 , and the following steps are specifically performed:

S 10: Start.

At this time, the initialization process can be performed, and the following steps are started after the initialization is completed.

S 11 : Monitor whether the set time period expires. If it expires, execute S 18; otherwise, execute S 12.

For the time period for monitoring the setting of the transmission link to be detected, it can be set according to actual needs. For example: When the transmission link is busy, the set time period can be set shorter, which can be set to 20S ( That is, 20 seconds), 15S, 10S, etc.; during the period when the transmission link is idle, the set time period can be set longer, and can be set to 60S, 50S, 40S, and the like. Multiple consecutive time periods can be set to monitor the arrival of the next set time period at the end of a set time period.

S12: When it is detected that the receiving end receives the data through the to-be-detected transmission link, perform CRC check processing on the received data. When the CRC result is incorrect, execute S14; otherwise, execute S13.

When detecting a transmission shield of a transmission link to be detected, the transmitting end sends data to the receiving end through the to-be-detected transmission link, and when detecting that the receiving end receives the data, performs CRC check processing on the received data, where The specific implementation process of the CRC check processing is prior art and will not be described here.

S 13 : Keep the current error count value and return to continue execution S 12 .

When the CRC check result is correct, the error count value used to characterize the number of errors in the CRC check result remains unchanged, and the received new data can be subjected to CRC check processing.

S 14: Increase the error count value by the set value.

When the CRC check result is an error, the error count value used to represent the error number of the CRC check result is increased by a set value, and the set value may be set according to actual needs, for example, may be 1, 2, 3, etc. .

S 15 : Determine whether the error count value after increasing the set value is not less than the set threshold. If yes, execute S 16; otherwise, return to continue executing S 12 .

Determining whether the error count value after increasing the set value is not less than a set threshold value, and the set threshold value is used to represent that when the error count value of the CRC check result is wrong reaches the set threshold value within a set time period, Then, it can be determined that the transmission link to be detected is faulty; otherwise, it can be determined that the transmission link to be detected is in a normal state. The set threshold can be set according to actual needs. For example: When the transmission link is busy, the set threshold can be set larger; during the period when the transmission link is idle, the set threshold can be set smaller.

S 16: The transmission link adjustment command is issued to indicate that the transmission link to be detected needs to be adjusted.

When the error count value after the set value is increased is not set to the threshold value, it is determined that the transmission link to be detected is faulty, and a transmission link adjustment command is required to indicate that the transmission link to be detected needs to be adjusted. SI 7: Zero the error count value after increasing the set value, and execute S 19 .

After the transmission link adjustment command is issued, the error count value after the increase of the set value can be reset to zero, so that the error count value can be re-counted in the next set time period; The error count value is reset to zero, and the error count value in the next set time period is continuously accumulated. In this case, the set threshold value needs to be adjusted separately for each set time period. Of course, other methods can be used.

S 18: If the error count value 'J after increasing the set value is added, the error count value after increasing the set value is reset to zero.

When the set time period expires, and the error count value 'J after the set value is increased, when the set threshold is set, the error count value after the set value is increased can be reset to zero, so that the next set is The error count value is re-counted in the time period; of course, the error count value after the increase of the set value is not reset to zero, and the error count value in the next set time period is continuously accumulated, and then it is necessary to set each time. The set time value is adjusted separately for the determined time period, and of course other methods can be used.

S 19: After entering the next time period of the setting, return to continue to execute S l l.

When the error count value after increasing the set value is zeroed, the set next time period can be entered, and then the transmission link is continuously detected.

The scheme determines the transmission shield of the transmission link by detecting the error count value of the data received within the set time period, and can set the length of the time period as needed, so that when the receiver receives the data, it can The data is subjected to CRC check processing, and the error count value is determined according to the check result, so that the transmission shield of the transmission link can be monitored in real time, and once the error count value is determined to reach the set threshold, the transmission link may be determined to be faulty. Since the transmission link is monitored in real time, the fault of the transmission link can be found in time, and the fault can be eliminated in time, which ensures the stability of the transmission link.

The scheme for detecting the shield of the transmission link in real time by comparing the error count value with the set threshold is described above. The scheme for detecting the transmission link shield by comparing the bit error rate with the set threshold is described below.

Based on the same inventive concept, an embodiment of the present invention provides a method for detecting a transmission link. The process of the method is as shown in FIG. 2, and the following steps are specifically performed:

S20: Start.

S21: Monitor whether the set time period expires. If it expires, execute S29; otherwise, execute S22.

The time period set here can be referred to the setting of the time period in S11.

S22: When detecting that the receiving end receives the data through the to-be-detected transmission link, increase the count value of the received data times for characterizing the number of times of receiving the data by a first set value, and perform CRC check processing on the received data. When the CRC check result is incorrect, execute S24; otherwise, execute S23.

Here, the number of times the data received in a set time period is counted is counted, and the number of received data is counted. The value is used to represent the statistical result. When the data is received, the count value of the received data is increased by a first set value, and the first set value may be set according to actual needs, for example, may be 1, 2, 3 and many more. The specific implementation process for performing CRC check processing on the received data is prior art, and details are not described herein again.

S23: Keep the current error count value and the received data count value, and return to continue execution S22.

S24: Increase the error count value by the second set value.

When the CRC check result is an error, the error count value used to represent the error number of the CRC check result is added to the second set value, and the second set value may be set according to actual needs, for example, may be 1, 2 , 3 and so on.

S25: Determine a bit error rate of the transmission link according to the count value of the received data after adding the first set value and the error count value after adding the second set value.

S26: Determine whether the determined bit error rate is not less than the first set threshold, and if yes, execute S27; otherwise, return to continue to execute S22.

Determining whether the determined bit error rate is not less than a first set threshold. The first set threshold is used to indicate that when the error rate of the transmission link reaches the first set threshold within a set time period, The transmission link to be detected is faulty; otherwise, the transmission link to be detected is in a normal state. The first set threshold may be set according to actual needs or set according to the busy state of the transmission link, and may be set according to other methods.

S27: Send a transmission link adjustment command to indicate that the transmission link to be detected needs to be adjusted.

When the error rate of the transmission link is not less than the first set threshold, it is determined that the transmission link to be detected is faulty, and a transmission link adjustment command is required to indicate that the transmission link to be detected needs to be adjusted.

After the transmission link is adjusted, when the transmission link is still in an unstable state, the error rate of the transmission link may reach the first set threshold, and the transmission link adjustment indication is sent back. The upper is in an unstable state, not a fault. In order to avoid misjudgment of the transmission link failure, in S26, it can be simultaneously determined whether the count value of the received data number after the first set value is increased is greater than the set second threshold value, and when it is greater than, the transmission link adjustment indication is issued again. This makes it more accurate to determine if the transmission link has failed.

S28: Zero the count value of the received data after increasing the first set value and the error count value after adding the second set value, respectively, and then execute S30.

After the transmission link adjustment command is issued, the count value of the received data count after adding the first set value and the error count value after increasing the set value may be reset to zero, so that the transmission may be re-transmitted in the next set time period. The error rate of the link is counted; of course, the count value of the received data after increasing the first set value and the error count value after the increase of the setting may not be reset to zero, and the accumulation of the next set time period is continued. Receiving the data count value and the error count value, of course, other methods can also be used.

S29: When the determined bit error rate is less than the set threshold, the bit error rate is reset to zero.

When the set time period expires, and the determined bit error rate is less than the set threshold, the bit error rate may be reset to zero, that is, after the first set value is added, the count value of the received data is increased and the setting is increased. The error count value is returned to zero, respectively. It is convenient to re-calculate the bit error rate in the next set time period; of course, the bit error rate may not be zeroed, and the bit error rate in the next set time period is continued to be counted, and then it is necessary to set each bit error rate. The set time threshold is adjusted for a fixed time period, and of course other methods can be used.

S30: After entering the set time period, continue to return to execution S21.

When the bit error rate is reset to zero, it can enter the set next time period and continue to detect the transmission link.

Specifically, in the foregoing S25, determining a bit error rate of the transmission link according to the count value of the received data number after adding the first set value and the error count value after adding the second set value, specifically including: adding the second The ratio of the error count value after the set value to the count value of the number of received data after increasing the first set value is determined as the bit error rate of the transmission link.

That is, in the set time period, the total number of received data, the number of times the CRC is processed to be determined as erroneous data as a percentage of the total number of received data, and the ratio is used to characterize the transmission. The transmission shield of the link. Of course, the smaller the ratio, the smaller the percentage of data received in the error data, and the better the transmission shield of the transmission link.

The scheme determines the transmission shield of the transmission link by detecting the bit error rate in the set time period, and can set the length of the time period according to the need, and when the receiving end receives the data, the received data can be performed. CRC check processing, and determine the bit error rate after receiving the data, thereby monitoring the transmission amount of the transmission link data in real time, and once the bit error rate reaches the set threshold, it can determine that the transmission link is faulty, because it is Real-time monitoring of the transmission link enables timely detection of faults on the transmission link and timely troubleshooting, which ensures the stability of the transmission link.

Based on the same inventive concept, an embodiment of the present invention provides a transmission link detecting apparatus. The structure of the apparatus is as shown in FIG. 3, and includes:

The cyclic redundancy check unit 31 is configured to perform a cyclic redundancy check CRC on the received data when detecting that the receiving end receives the data through the to-be-detected transmission link in each set time period.

The error counting unit 32 is configured to increase the error count value by a set value when the CRC result is incorrect.

The transmission shield determining unit 33, when the error count value after adding the set value in the error technical unit is not less than the set threshold, issues a transmission link adjustment command indicating that the transmission link to be detected needs to be adjusted.

Preferably, the transmission shield determining unit 33 is further configured to: when each set time period expires, if the error count value after adding the set value is less than the set threshold, the set value is increased. The error count value is reset to zero; or after the transmission link adjustment command is issued, the error count value after the set value is increased is reset to zero.

Based on the same inventive concept, an embodiment of the present invention provides a transmission link detecting apparatus. The structure of the apparatus is as shown in FIG. 4, and includes:

The cyclic redundancy check unit 41 is configured to: when each time period is detected, when the receiving end receives the data through the to-be-detected transmission link, the count value of the received data used to represent the number of times the received data is received Adding a first set value; performing a cyclic redundancy check CRC on the received data;

The error counting unit 42 is configured to increase the error count value by a second set value when the CRC result is incorrect; The bit error rate determining unit 43 is configured to determine a bit error rate of the transmission link according to the count value of the received data number after adding the first set value and the error count value after adding the second set value;

The transmission shield determining unit 44 is configured to determine, according to the determined error rate, whether to issue a transmission link adjustment instruction, indicating that the transmission link to be detected needs to be adjusted.

Specifically, the error rate determining unit 43 is specifically configured to: determine, as a transmission link, a ratio of an error count value after adding the second set value to a count value of the received data number after adding the first set value. Bit error rate.

Specifically, the transmission shield quantity determining unit 44 is configured to: when the determined error rate is not less than the first set threshold, issue a transmission link adjustment instruction to indicate that the to-be-detected transmission link needs to be adjusted; or in the determined error When the code rate is not less than the first set threshold, and the count value of the received data number after the first set value is increased is greater than the second set threshold, the transmission link adjustment command is issued to indicate that the transmission link to be detected needs to be adjusted.

Preferably, the transmission shield determination unit 44 is further configured to: when each of the set time periods expires, when the determined error rate is less than the set threshold, zero the error rate; or send the transmission. After the link adjustment command, the count value of the received data number after increasing the first set value and the error count value after adding the second set value are respectively zeroed.

Based on the same inventive concept, an embodiment of the present invention provides a transmission link detection system. The structure of the device is as shown in FIG. 5, and includes:

A transmitting end 51 for transmitting data, a receiving end 52 for receiving data, and a transmission link detecting device 53 are included; the transmission link detecting device includes the link detecting device as shown in FIG. 3 and/or as shown in FIG. Link detection device.

Preferably, the above transmission link detecting device 52 is disposed in the receiving end 52.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The device is implemented in a flow or a flow or a block diagram of a block or multiple The function specified in the box.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and modifications of the inventions

Claims

Rights request

A transmission link detection method, comprising:

During each set time period, when it is detected that the receiving end receives data through the to-be-detected transmission link, the received data is subjected to a cyclic redundancy check CRC;

When the CRC result is incorrect, the error count value is increased by the set value;

When the error count value after the set value is increased is not less than the set threshold, the transmission link adjustment instruction is issued to indicate that the transmission link to be detected needs to be adjusted.

2. The method of claim 1, further comprising:

When the set time period expires, if the error count value 'J after the set value is increased, the error count value after the set value is increased is reset to zero; or

After the transmission link adjustment command is issued, the error count value after the set value is increased is reset to zero.

3. A transmission link detection method, characterized in that it comprises:

During each set time period, when it is detected that the receiving end receives the data through the to-be-detected transmission link, the count value of the received data used to characterize the number of times of receiving the data is increased by the first set value;

Performing a cyclic redundancy check on the received data CRC;

When the CRC result is incorrect, the error count value is increased to the second set value;

Determining the bit error rate of the transmission link according to the count value of the received data after increasing the first set value and the error count value after increasing the second set value;

And determining, according to the determined bit error rate, whether to issue a transmission link adjustment command to indicate that the to-be-detected transmission link needs to be adjusted.

The method according to claim 3, wherein the error rate of the transmission link is determined according to the count value of the received data after increasing the first set value and the error count value after adding the second set value Specifically, including:

The ratio of the error count value after the second set value is increased to the count value of the received data number after the first set value is increased is determined as the bit error rate of the transmission link.

The method of claim 3, wherein determining, according to the determined error rate, whether to issue a transmission link adjustment instruction, indicating that the to-be-detected transmission link needs to be adjusted, includes:

And when the determined bit error rate is not less than the first set threshold, sending a transmission link adjustment instruction to indicate that the to-be-detected transmission link needs to be adjusted; or

Sending a transmission link adjustment instruction to indicate the to-be-detected transmission when the determined bit error rate is not less than the first set threshold, and the received data number count value after the first set value is increased is greater than the second set threshold The link needs to be adjusted.

6. The method of claim 3, further comprising:

When the set time period expires, when the determined bit error rate is less than the set threshold, the bit error rate is reset to zero; or

After the transmission link adjustment command is issued, the count value of the received data number after increasing the first set value and the error count value after adding the second set value are respectively zeroed.

7. A transmission link detecting apparatus, comprising:

a cyclic redundancy check unit, configured to perform a cyclic redundancy check CRC on the received data when detecting that the receiving end receives data through the to-be-detected transmission link in each time period set;

An error counting unit, configured to: when the CRC result is incorrect, increase the error count value by a set value; and transmit a shield amount determining unit, where the error count value after adding the set value in the error technical unit is not less than When the threshold is set, a transmission link adjustment command is issued to indicate that the transmission link to be detected needs to be adjusted.

The device according to claim 7, wherein the transmission shield determining unit is further configured to: when the set time period expires, if the error value is increased after the set value is increased The value 'J, after setting the threshold, resets the error count value after increasing the set value; or

9. A transmission link detecting apparatus, comprising:

a cyclic redundancy check unit, configured to increase a count value of the number of received data used to characterize the number of times of receiving data when detecting that the receiving end receives data through the to-be-detected transmission link in each set time period a first set value; and performing cyclic redundancy check CRC on the received data;

An error counting unit, configured to: when the CRC result is incorrect, increase the error count value by a second set value; the error rate determining unit is configured to: according to the count value of the received data after adding the first set value, and increase the number The error count value after the second set value determines the bit error rate of the transmission link;

And a transmission shield determining unit, configured to determine, according to the determined error rate, whether to issue a transmission link adjustment command, indicating that the to-be-detected transmission link needs to be adjusted.

The apparatus according to claim 9, wherein the error rate determining unit is specifically configured to: receive an error count value after adding the second set value and receive data after adding the first set value The ratio of the count values is determined as the bit error rate of the transmission link.

The device according to claim 9, wherein the transmission shield determining unit is specifically configured to: issue a transmission link adjustment command when the determined error rate is not less than a first set threshold Instructing the transmission link to be detected to be adjusted; or

Counting the number of received data after the determined bit error rate is not less than the first set threshold and the first set value is increased When the value is greater than the second set threshold, issuing a transmission link adjustment command indicates that the to-be-detected transmission link needs to be adjusted.

The device according to claim 9, wherein the transmission shield determining unit is further configured to: when each set time period expires, when the determined bit error rate is less than a setting Zeroing the bit error rate when the threshold is reached; or

A transmission link detection system, comprising: a transmitting end for transmitting data, a receiving end for receiving data, and a transmission link detecting device; wherein the transmission link detecting device comprises the following claim 7 A transmission link detecting apparatus according to any of the preceding claims, and/or a transmission link detecting apparatus according to any one of claims 9-12.

14. The system according to claim 13, wherein the transmission link detecting device is disposed in the receiving end.