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CN-122001464-A - Optical link monitoring method, device and network equipment

CN122001464ACN 122001464 ACN122001464 ACN 122001464ACN-122001464-A

Abstract

The application provides an optical link monitoring method, an optical link monitoring device and network equipment. In the embodiment, a first detection signal is acquired, wherein the first detection signal is a signal received by a receiving end after being transmitted by an optical link, and the operation and maintenance problems of the optical link are determined according to the peak value of the first detection signal at each frequency point. Therefore, the cost of optical link monitoring can be reduced, and the service operation efficiency can be improved.

Inventors

  • GONG HANG
  • LUO QINGYUN
  • FU ZIXIN
  • HU HONGFEI

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20241108

Claims (20)

  1. 1. A method of optical link monitoring, the method comprising: acquiring a first detection signal, wherein the first detection signal is a signal received by a receiving end after being transmitted through an optical link; and determining the operation and maintenance problem of the optical link according to the peak value of the first detection signal at each frequency point.
  2. 2. The method according to claim 1, wherein the method further comprises: acquiring the time when the first detection signal reaches the receiving end and the time when a reflected signal reaches the receiving end, wherein the reflected signal is a signal generated by the first detection signal in the transmission process of the optical link; And positioning the position of the operation and maintenance problem in the optical link according to the moment when the detection signal reaches the receiving end and the moment when the reflection signal reaches the receiving end.
  3. 3. The method according to claim 1 or 2, characterized in that the method further comprises: acquiring a second detection signal, wherein the second detection signal is the same signal as the first detection signal; The determining the operation and maintenance problem of the optical link according to the peak value of the first detection signal at each frequency point includes: superposing the first detection signal and the second detection signal to obtain a first signal; and determining the operation and maintenance problems of the optical link according to the peak value of the first signal at each frequency point.
  4. 4. A method according to claim 3, wherein the identification code carried by the first probe signal and the identification code carried by the second probe signal are the same, and the transmission interval between the first probe signal and the second probe signal is greater than a preset interval threshold, the interval threshold being associated with the length of the optical link; or the identification code carried by the first detection signal is different from the identification code carried by the second detection signal.
  5. 5. The method of claim 3 or 4, wherein determining the operational problem of the optical link based on the peak value of the first signal at each frequency point comprises: calculating the average value of the peak value of the first signal at each frequency point; and under the condition that the ratio of the peak value of the frequency point to the average value is larger than a preset threshold value, determining that the frequency point has an operation and maintenance problem.
  6. 6. The method according to any one of claims 1-5, further comprising: and generating and displaying monitoring result information, wherein the monitoring result information is used for indicating the operation and maintenance problems of the optical link.
  7. 7. The method according to any one of claims 1-6, wherein the method is applied to a controller or a network management device, The obtaining the first detection signal comprises receiving the first detection signal sent by the receiving end, or The method for acquiring the first detection signal comprises the steps of receiving a service signal sent by the receiving end, wherein the service signal comprises the first detection signal, and extracting the first detection signal from the service signal.
  8. 8. The method according to any one of claims 1-7, wherein the method is applied at the receiving end, The acquisition of the first detection signal comprises receiving the first detection signal sent by a sending end, wherein the receiving end and the sending end communicate through the optical link, or The method for acquiring the first detection signal comprises the steps of receiving a service signal sent by a sending end, wherein the service signal comprises the first detection signal, and extracting the first detection signal from the service signal.
  9. 9. The method according to any one of claims 1-8, wherein the first probe signal is a complementary sequence or a simplex code.
  10. 10. An optical link monitoring device, the device comprising: the acquisition module is used for acquiring a first detection signal, wherein the first detection signal is a signal received by a receiving end after being transmitted through an optical link; And the determining module is used for determining the operation and maintenance problems of the optical link according to the peak value of the first detection signal at each frequency point.
  11. 11. The apparatus of claim 10, wherein the obtaining module is further configured to obtain a time when the first probe signal arrives at the receiving end and a time when a reflected signal arrives at the receiving end, where the reflected signal is a signal generated by the first probe signal during the optical link transmission process; The apparatus further comprises: and the determining module is used for positioning the position of the operation and maintenance problem in the optical link according to the moment when the detection signal reaches the receiving end and the moment when the reflection signal reaches the receiving end.
  12. 12. The device according to claim 10 or 11, wherein, The acquisition module is further used for acquiring a second detection signal, and the second detection signal is the same signal as the first detection signal; The determining module is used for: superposing the first detection signal and the second detection signal to obtain a first signal; and determining the operation and maintenance problems of the optical link according to the peak value of the first signal at each frequency point.
  13. 13. The apparatus of claim 12, wherein the identification code carried by the first probe signal is the same as the identification code carried by the second probe signal, and wherein a transmission interval between the first probe signal and the second probe signal is greater than a preset interval threshold, the interval threshold being associated with a length of the optical link; or the identification code carried by the first detection signal is different from the identification code carried by the second detection signal.
  14. 14. The apparatus according to claim 12 or 13, wherein the determining module is configured to: calculating the average value of the peak value of the first signal at each frequency point; and under the condition that the ratio of the peak value of the frequency point to the average value is larger than a preset threshold value, determining that the frequency point has an operation and maintenance problem.
  15. 15. The apparatus according to any one of claims 10-14, wherein the apparatus further comprises: the display module is used for generating and displaying monitoring result information, and the monitoring result information is used for indicating the operation and maintenance problems of the optical link.
  16. 16. The apparatus according to any of claims 10-15, wherein the apparatus is applied to a controller or a network management device; The acquisition module is used for receiving the first detection signal sent by the receiving end, or The acquisition module is used for receiving the service signal sent by the receiving end, wherein the service signal comprises the first detection signal, and the first detection signal is extracted from the service signal.
  17. 17. The apparatus according to any of the claims 10-16, wherein the apparatus is applied at the receiving end, The acquisition module is used for receiving a first detection signal sent by a sending end, the receiving end and the sending end communicate through the optical link, or The acquisition module is used for receiving the service signal sent by the sending end, wherein the service signal comprises the first detection signal, and the first detection signal is extracted from the service signal.
  18. 18. The apparatus of any one of claims 10-17, wherein the first probe signal is a complementary sequence or a simplex code.
  19. 19. A network device, comprising: A memory for storing executable code; a processor for implementing the method of any of claims 1-9 when executing the executable code.
  20. 20. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed in a computer, causes the computer to perform the method of any of claims 1-9.

Description

Optical link monitoring method, device and network equipment Technical Field The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, and a network device for monitoring an optical link. Background In the transmission process of the optical signal in the optical link, the return loss occurs in the optical fiber link due to factors such as Fresnel reflection, rayleigh scattering and the like. For example, the end face of the connector in the optical link is dirty, the connector is not tightly matched (such as the air gap and the fiber core are not aligned or loose), the fiber is cracked, the fiber end is open, and the fiber core is introduced into impurities in the manufacturing process, etc., which all cause fresnel reflection or rayleigh scattering of the optical link, so that the optical link has return loss, that is, the optical link has faults. Currently, in order to identify and locate optical link failures, optical time domain reflectometer (Optical Time Domain Reflectometer, OTDR) techniques are commonly employed. OTDR techniques require the addition of custom-made laser diodes in the optical module. Injecting high power optical pulses into the fiber through a custom made laser diode increases the cost of optical link monitoring. And, because the power of the optical pulse is high, the traffic between the network devices needs to be stopped. Therefore, a scheme for monitoring the optical link without adding any hardware to the optical module and without stopping the operation of the service is needed. Disclosure of Invention The embodiment of the application provides an optical link monitoring method, an optical link monitoring device and network equipment, which can reduce the cost of optical link monitoring and improve the service operation efficiency. In a first aspect, an embodiment of the present application provides an optical link monitoring method, including: acquiring a first detection signal, wherein the first detection signal is a signal received by a receiving end after being transmitted through an optical link; and determining the operation and maintenance problem of the optical link according to the peak value of the first detection signal at each frequency point. According to the scheme, the first detection signal is transmitted from the transmitting end to the receiving end through the optical link, and if the optical link has an operation and maintenance problem, the first detection signal is fixedly interfered. Thus, the first probe signal carries information of fixed interference. The peak value of the first detection signal at each frequency point can be used for determining the operation and maintenance problems of the optical link. Therefore, the operation and maintenance problem is determined through the first detection signal received by the receiving end, and the optical module of the receiving end does not need to be suspended, so that the monitoring of the optical link can be completed without suspending the operation of the service, and the operation efficiency of the service is improved. Moreover, through the scheme, the monitoring of the optical link can be realized on the basis of the original structure of the optical module, any hardware is not required to be added on the optical module, and the monitoring cost of the optical link is reduced. In one possible implementation, the method further includes: acquiring the time when the first detection signal reaches the receiving end and the time when a reflected signal reaches the receiving end, wherein the reflected signal is a signal generated by the first detection signal in the transmission process of the optical link; And positioning the position of the operation and maintenance problem in the optical link according to the moment when the detection signal reaches the receiving end and the moment when the reflection signal reaches the receiving end. Therefore, the first detection signal received by the receiving end not only can determine whether the optical link has the operation and maintenance problem, but also can position the operation and maintenance problem at the specific position of the optical link according to the receiving time of the first detection signal and the receiving time of the reflection signal generated by the first detection signal, thereby improving the operation and maintenance efficiency of the optical link and further improving the service operation efficiency. In one possible implementation, the method further includes: acquiring a second detection signal, wherein the second detection signal is the same signal as the first detection signal; The determining the operation and maintenance problem of the optical link according to the peak value of the first detection signal at each frequency point includes: superposing the first detection signal and the second detection signal to obtain a first signal; and determining the operatio