Port detection method and device

文档序号：1834445 发布日期：2021-11-12 浏览：20次中文

阅读说明：本技术 端口检测方法和装置 (Port detection method and device ) 是由林华枫周恩宇曾小飞于 2020-05-11 设计创作，主要内容包括：本申请提供了端口监测方法和装置,在本申请的技术方案中,OLT或ONU可以根据至少两个波长、以及预设的对应关系,确定ONU对应的分光器的端口信息。也就是说,与ONU直接或者间接连接的分支端通过至少两个波长来定义。这样,可以通过多个波长的组合来区分不同的分支端,从而实现用少量波长的自由组合,定义大量的分光器的分支端,有助于避免由于监控波长范围的限制而引起的监控波长数量不够的问题,实现准确地确定ONU与分光器的分支端的连接关系。(In the technical scheme of the application, the OLT or the ONU can determine the port information of the optical splitter corresponding to the ONU according to at least two wavelengths and a preset corresponding relation. That is, the branch end directly or indirectly connected to the ONU is defined by at least two wavelengths. Therefore, different branch ends can be distinguished through the combination of a plurality of wavelengths, so that free combination of a small number of wavelengths is realized, a large number of branch ends of the optical splitter are defined, the problem that the number of monitoring wavelengths is insufficient due to the limitation of the monitoring wavelength range is avoided, and the connection relation between the ONU and the branch ends of the optical splitter is accurately determined.)

1. A method for port detection, the method comprising:

an optical line terminal OLT sends optical signals with M wavelengths to at least one optical network unit ONU, wherein the M wavelengths are different from each other, and M is an integer greater than 1;

the OLT receives at least one piece of feedback information sent by a first ONU, wherein the at least one piece of feedback information is used for indicating that the first ONU receives the value of the optical power of the optical signal with the M wavelengths, and the first ONU is any one of the at least one ONU;

the OLT determines R wavelengths corresponding to the first ONU according to the value of the optical power of the optical signal with the M wavelengths, wherein R is an integer greater than or equal to 2;

and the OLT determines port information of a first optical splitter corresponding to the first ONU according to at least two wavelengths in the R wavelengths, wherein a first branch end of the first optical splitter corresponds to the at least two wavelengths.

2. The method of claim 1,

the optical power values of the optical signals corresponding to the R wavelengths are smaller than a first preset value; alternatively, the first and second electrodes may be,

the optical power values of the optical signals corresponding to the R wavelengths are greater than a second preset value; alternatively, the first and second electrodes may be,

the R wavelengths are wavelengths corresponding to minimum R optical power values among the optical power values of the optical signals of the M wavelengths; alternatively, the first and second electrodes may be,

the R wavelengths are wavelengths corresponding to maximum R values of optical power among values of optical power of the optical signals of the M wavelengths; alternatively, the first and second electrodes may be,

when a difference greater than a third preset threshold exists in the differences between the values of the optical power of the optical signals with the M wavelengths, the R wavelengths are the wavelengths corresponding to the minimum R values of the optical power of the optical signals with the M wavelengths; alternatively, the first and second electrodes may be,

when there is a difference greater than a third preset threshold in the differences between the values of the optical powers of the optical signals of the M wavelengths, the R wavelengths are the wavelengths corresponding to the maximum R values of the optical powers of the optical signals of the M wavelengths.

3. The method according to claim 1 or 2, wherein the first branch end is provided with a reflection point for reflecting the optical signals of the at least two wavelengths or for reflecting the optical signals of the wavelengths other than the at least two wavelengths of the M wavelengths.

4. The method according to any of claims 1 to 3, wherein the optical signals of M wavelengths and the at least one feedback information are carried in physical layer operation administration and maintenance, PLOAM, messages, optical network terminal management and control interface, OMCI, messages or data tunnels.

5. A method for port detection, the method comprising:

an optical network unit ONU receives an optical signal with M wavelengths sent by an optical line terminal OLT, wherein the M wavelengths are different from each other, and M is an integer greater than 1;

the ONU determines R wavelengths corresponding to the ONU according to the value of the optical power of the optical signal with the M wavelengths, wherein R is an integer greater than or equal to 2;

the ONU determines port information of the first optical splitter corresponding to the ONU according to at least two wavelengths in the R wavelengths, wherein a first branch end of the first optical splitter corresponds to the at least two wavelengths;

and the ONU sends feedback information to the OLT, wherein the feedback information is used for indicating the port information.

6. The method of claim 5,

the optical power values of the optical signals corresponding to the R wavelengths are smaller than a first preset value; alternatively, the first and second electrodes may be,

the optical power values of the optical signals corresponding to the R wavelengths are greater than a second preset value; alternatively, the first and second electrodes may be,

7. The method according to claim 5 or 6, wherein the first branch end is provided with a reflection point for reflecting the optical signals of the at least two wavelengths or for reflecting the optical signals of the wavelengths other than the at least two wavelengths of the M wavelengths.

8. The method according to any of claims 5 to 7, wherein the optical signals of M wavelengths and the feedback information are carried in physical layer operation administration and maintenance, PLOAM, messages, optical network terminal management and control interface, OMCI, messages or data tunnels.

9. A passive optical network, PON, system, the system comprising: an optical line terminal OLT and at least one optical network unit ONU;

the OLT is configured to send optical signals with M wavelengths to the at least one ONU, where the M wavelengths are different from each other, and M is an integer greater than 1;

a first ONU of the at least one ONU, configured to send at least one feedback information to the OLT, where the at least one feedback information is used to indicate that the first ONU receives the value of the optical power of the optical signal with the M wavelengths;

the OLT is configured to determine, according to the magnitude of the optical power value of the optical signal with the M wavelengths, R wavelengths corresponding to the first ONU, where R is a positive integer greater than or equal to 2;

the OLT is further configured to determine, according to at least two wavelengths of the R wavelengths, port information of the first ONU corresponding to a first optical splitter, where a first branch end of the first optical splitter corresponds to the at least two wavelengths.

10. The system of claim 9,

the optical power values of the optical signals corresponding to the R wavelengths are smaller than a first preset value; alternatively, the first and second electrodes may be,

the optical power values of the optical signals corresponding to the R wavelengths are greater than a second preset value; alternatively, the first and second electrodes may be,

11. The system of claim 9 or 10,

the first branch end is provided with a reflection point, and the reflection point is used for reflecting the optical signals with the at least two wavelengths, or the reflection point is used for reflecting the optical signals with the wavelengths except the at least two wavelengths in the M wavelengths.

12. The system according to any of claims 9 to 11, wherein the optical signals of M wavelengths and the at least one feedback information are carried in physical layer operation administration and maintenance, PLOAM, messages, optical network terminal management and control interface, OMCI, messages or data tunnels.

13. A passive optical network, PON, system, the system comprising: an optical line terminal OLT and at least one optical network unit ONU;

the OLT is configured to send optical signals with M wavelengths to the at least one ONU, where the M wavelengths are different from each other, and M is an integer greater than 1;

a first ONU of the at least one ONU is configured to determine, according to a value of optical power of the optical signal with the M wavelengths received, R wavelengths corresponding to the first ONU, where R is an integer greater than or equal to 2;

the first ONU is further configured to determine, according to at least two wavelengths of the R wavelengths, port information of the first ONU corresponding to a first optical splitter, where a first branch end of the first optical splitter corresponds to the at least two wavelengths;

the first ONU is further configured to send feedback information to the OLT, where the feedback information is used to indicate the port information;

and the OLT is used for determining the port information according to the feedback information.

14. The system of claim 13,

the optical power values of the optical signals corresponding to the R wavelengths are smaller than a first preset value; alternatively, the first and second electrodes may be,

the optical power values of the optical signals corresponding to the R wavelengths are greater than a second preset value; alternatively, the first and second electrodes may be,

15. The system of claim 13 or 14,

16. The system according to any of claims 13 to 15, wherein the optical signals of M wavelengths and the feedback information are carried in physical layer operation administration and maintenance, PLOAM, messages, optical network terminal management and control interface, OMCI, messages or data tunnels.

17. A beam splitter, comprising:

each first branch end of the N first branch ends is provided with a reflection point, the reflection point of each first branch end is used for reflecting optical signals with multiple wavelengths, the wavelengths of at least one optical signal between any two optical signals which are used for being reflected by the reflection points of the first branch ends are different, and N is an integer larger than 0.

18. The optical splitter of claim 17, further comprising:

the optical fiber coupler comprises K second branch ends, wherein each of the K second branch ends is provided with a reflection point, the reflection point of each second branch end is used for reflecting an optical signal with one wavelength, the wavelengths of the optical signals which are used for reflection by the reflection points of any two second branch ends are different, and K is an integer larger than 0.

19. The optical splitter of claim 17 or 18, further comprising:

a third branch end, the third branch end not provided with a reflection point.

20. The optical splitter according to any one of claims 17 to 19, wherein N1 of the N first branch ends are respectively provided with one reflection point for reflecting the optical signals of the plurality of wavelengths.

21. The optical splitter according to any one of claims 17 to 20, wherein N2 of the N first branch ends are respectively provided with a plurality of reflection points for reflecting the optical signals of the plurality of wavelengths.

22. A splitter as claimed in any one of claims 17 to 21, in which the reflecting dots are formed by etching gratings at the branch ends and/or by coating the end faces of the branch ends.

23. A port detection apparatus comprising a processor and a memory, wherein the processor is coupled to the memory and configured to read and execute instructions stored in the memory, to implement the method of any one of claims 1 to 4, or to implement the method of any one of claims 5 to 8.

24. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to carry out the method of any one of claims 1 to 4 or carry out the method of any one of claims 5 to 8.

Technical Field

The present application relates to the field of communications, and more particularly, to a port detection method and apparatus.

Background

In a Passive Optical Network (PON) system, at least three kinds of devices are included: an Optical Line Termination (OLT), an Optical Distribution Network (ODN), and an Optical Network Unit (ONU). Among other things, one or more splitters (splitters) may be included within the ODN, which may enable one or more levels of splitting of the ODN. For example, taking the second-stage splitting as an example, the first-stage splitter 1 equally divides the power of the received optical signal and transmits the power to the splitters 2 and 3 respectively connected to the branch ends of the first-stage splitter 1, where the splitters 2 and 3 are the second-stage splitters, and then the splitters 2 and 3 equally divide the power of the received optical signal and transmit the power to the connected ONUs respectively, the branch end of the last-stage splitter in the ODN is used as the output port of the ODN, and the ONUs are connected to the output port of the ODN.

In the operation and maintenance process of the PON system, the accurate connection relationship between the ONU and the branch end of the optical splitter can provide correct resource management information for operators or customers, and is favorable for recycling and utilizing resources. For example, when a certain user unsubscribes from a service, the connection between the user and the optical splitter can be cancelled, and the idle optical splitter branch end can be provided for a new user to use, so that resource waste can be avoided.

A method for determining the connection relationship between an ONU and a branch end of an optical splitter is as follows: outside the service wavelength, in the monitoring wavelength range, each branch end of the optical splitter reflects an optical signal with a specific wavelength in the monitoring wavelength range, so that the optical signals received by each ONU are different, the corresponding relation between each ONU and the specific wavelength can be determined, and the connection relation between the ONU and the branch end of the optical splitter can be determined according to the corresponding relation between the wavelength and the branch end of the optical splitter when the optical splitter is factory set.

However, due to the limitation of the monitoring wavelength range, in some cases, sufficient wavelengths cannot be allocated to the optical splitter to distinguish different branch ends of the optical splitter, and thus the connection relationship between the ONU and the branch end of the optical splitter cannot be accurately determined.

Disclosure of Invention

The application provides a port detection method and a port detection device, which can realize that different branch ends of an optical splitter can be distinguished by fewer wavelengths, so that the connection relation between an ONU and the branch ends of the optical splitter can be accurately determined.

In a first aspect, the present application provides a port detection method, including: an optical line terminal OLT sends optical signals with M wavelengths to at least one optical network unit ONU, wherein the M wavelengths are different from each other, and M is an integer greater than 1; the OLT receives at least one piece of feedback information sent by a first ONU, wherein the at least one piece of feedback information is used for indicating that the first ONU receives the value of the optical power of the optical signal with the M wavelengths, and the first ONU is any one of the at least one ONU; the OLT determines R wavelengths corresponding to the first ONU according to the value of the optical power of the optical signal with the M wavelengths, wherein R is an integer greater than or equal to 2; and the OLT determines port information of a first optical splitter corresponding to the first ONU according to at least two wavelengths in the R wavelengths, wherein a first branch end of the first optical splitter corresponds to the at least two wavelengths.

Optionally, the OLT may determine port information of the first optical splitter corresponding to the first ONU, through a correspondence between the first branch end of the first optical splitter and the at least two wavelengths. The corresponding relationship between the first branch end of the first optical splitter and the at least two wavelengths may be pre-configured in the OLT, so that after the OLT determines the at least two wavelengths, it may be determined that the first ONU is connected to the first branch end of the first optical splitter according to the pre-configured corresponding relationship.

It should be noted that the OLT may send optical signals with M wavelengths to at least one ONU through a laser. The laser may be integrated in the OLT or may be set independently of the OLT. When the laser is set independently of the OLT, the laser may be a part of the OLT system, and thus, in the embodiment of the present application, it is collectively described that the OLT transmits optical signals of M wavelengths to at least one ONU.

In the above technical solution, the OLT determines port information of the first optical splitter corresponding to the first ONU according to at least two wavelengths. That is, in the above technical solution, the branch end directly or indirectly connected to the first ONU is defined by at least two wavelengths. Therefore, different branch ends can be distinguished through the combination of a plurality of wavelengths, so that free combination of a small number of wavelengths is realized, a large number of branch ends of the optical splitter are defined, the problem that the number of monitoring wavelengths is insufficient due to the limitation of the monitoring wavelength range is avoided, and the connection relation between the ONU and the branch ends of the optical splitter is accurately determined.

With reference to the first aspect, in a possible implementation manner, the optical power values of the optical signals corresponding to the R wavelengths are smaller than a first preset value; or, the optical power values of the optical signals corresponding to the R wavelengths are greater than a second preset value.

With reference to the first aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the R wavelengths are wavelengths corresponding to minimum R optical power values among optical power values of the optical signals with the M wavelengths; alternatively, the R wavelengths are wavelengths corresponding to the maximum R values of optical power among the values of optical power of the optical signals of the M wavelengths.

With reference to the first aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, when there is a difference greater than a third preset threshold in differences between values of optical powers of the optical signals with the M wavelengths, the R wavelengths are wavelengths corresponding to minimum values of R optical powers in the values of optical powers of the optical signals with the M wavelengths; or, when there is a difference greater than a third preset threshold in the differences between the values of the optical powers of the optical signals with the M wavelengths, the R wavelengths are the wavelengths corresponding to the largest R values of the optical powers of the optical signals with the M wavelengths.

With reference to the first aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the determining, by the OLT, R wavelengths corresponding to the first ONU according to the magnitude of the optical power value of the optical signal with M wavelengths includes: when the difference between the value of the first optical power and the value of the second optical power is greater than a third preset value and the value of the first optical power is greater than the value of the second optical power, the OLT determines that the wavelength of the optical signal corresponding to the value of the second optical power is the wavelength corresponding to the first ONU, and the value of the first optical power and the value of the second optical power are any two of the values of the optical powers of the optical signals with the M wavelengths; or when the difference between the first optical power value and the second optical power value is greater than a third preset value and the first optical power value is greater than the second optical power value, the OLT determines that the wavelength of the optical signal corresponding to the first optical power value is the wavelength corresponding to the first ONU, and the first optical power value and the second optical power value are any two of the optical power values of the optical signals with the M wavelengths.

With reference to the first aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, a reflection point is disposed at the first branch end, where the reflection point is used to reflect the optical signals with the at least two wavelengths, or the reflection point is used to reflect the optical signals with wavelengths other than the at least two wavelengths in the M wavelengths.

With reference to the first aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the optical signals with M wavelengths and the at least one feedback information are carried in a Physical Layer Operation Administration and Maintenance (PLOAM) message, an optical network terminal management and control interface (OMCI) message, or a data channel.

In a second aspect, the present application provides a port detection method, including: an optical network unit ONU receives an optical signal with M wavelengths sent by an optical line terminal OLT, wherein the M wavelengths are different from each other, and M is an integer greater than 1; the ONU determines R wavelengths corresponding to the ONU according to the value of the optical power of the optical signal with the M wavelengths, wherein R is an integer greater than or equal to 2; the ONU determines port information of the first optical splitter corresponding to the ONU according to at least two wavelengths in the R wavelengths, wherein a first branch end of the first optical splitter corresponds to the at least two wavelengths; and the ONU sends feedback information to the OLT, wherein the feedback information is used for indicating the port information.

Optionally, the ONU may determine, by using a correspondence between the first branch end of the first optical splitter and at least two wavelengths, port information of the first optical splitter corresponding to the ONU. The corresponding relationship between the first branch end of the first optical splitter and the at least two wavelengths may be pre-configured in the ONU, so that after the ONU determines the at least two wavelengths, it may be determined that the ONU is connected to the first branch end of the first optical splitter according to the pre-configured corresponding relationship.

In the above technical solution, the ONU determines port information of the first optical splitter corresponding to the ONU according to at least two wavelengths. That is, in the above technical solution, the branch end directly or indirectly connected to the ONU is defined by at least two wavelengths. Therefore, different branch ends can be distinguished through the combination of a plurality of wavelengths, so that free combination of a small number of wavelengths is realized, a large number of branch ends of the optical splitter are defined, the problem that the number of monitoring wavelengths is insufficient due to the limitation of the monitoring wavelength range is avoided, and the connection relation between the ONU and the branch ends of the optical splitter is accurately determined.

With reference to the second aspect, in a possible implementation manner, the optical power values of the optical signals corresponding to the R wavelengths are smaller than a first preset value; or, the optical power values of the optical signals corresponding to the R wavelengths are greater than a second preset value.

With reference to the second aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the R wavelengths are wavelengths corresponding to minimum R optical power values among the optical power values of the optical signals with the M wavelengths; alternatively, the R wavelengths are wavelengths corresponding to the maximum R values of optical power among the values of optical power of the optical signals of the M wavelengths.

With reference to the second aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, when there is a difference greater than a third preset threshold in differences between values of optical powers of the optical signals with the M wavelengths, the R wavelengths are wavelengths corresponding to minimum R values of optical powers in the values of optical powers of the optical signals with the M wavelengths; or, when there is a difference greater than a third preset threshold in the differences between the values of the optical powers of the optical signals with the M wavelengths, the R wavelengths are the wavelengths corresponding to the largest R values of the optical powers of the optical signals with the M wavelengths.

With reference to the second aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the determining, by the ONU, R wavelengths corresponding to the ONU according to the magnitude of the optical power value of the optical signal with the M wavelengths includes: when the difference value between the first optical power value and the second optical power value is greater than a third preset value and the first optical power value is greater than the second optical power value, the ONU determines that the wavelength of the optical signal corresponding to the second optical power value is the wavelength corresponding to the first ONU, and the first optical power value and the second optical power value are any two of the optical power values of the optical signals with the M wavelengths; or when the difference between the value of the first optical power and the value of the second optical power is greater than a third preset value and the value of the first optical power is greater than the value of the second optical power, the ONU determines that the wavelength of the optical signal corresponding to the value of the first optical power is the wavelength corresponding to the first ONU, and the value of the first optical power and the value of the second optical power are any two of the values of the optical powers of the optical signals with the M wavelengths.

With reference to the second aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, a reflection point is disposed at the first branch end, where the reflection point is used to reflect the optical signals with the at least two wavelengths, or the reflection point is used to reflect the optical signals with wavelengths other than the at least two wavelengths in the M wavelengths.

With reference to the second aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the optical signals with M wavelengths and the feedback information are carried in a PLOAM message, an OMCI message, or a data channel.

In a third aspect, the present application provides a passive optical network PON system, including: an optical line terminal OLT and at least one optical network unit ONU; the OLT is configured to send optical signals with M wavelengths to the at least one ONU, where the M wavelengths are different from each other, and M is an integer greater than 1; a first ONU of the at least one ONU, configured to send at least one feedback information to the OLT, where the at least one feedback information is used to indicate that the first ONU receives the value of the optical power of the optical signal with the M wavelengths; the OLT is configured to determine, according to the magnitude of the optical power value of the optical signal with the M wavelengths, R wavelengths corresponding to the first ONU, where R is a positive integer greater than or equal to 2; the OLT is further configured to determine, according to at least two wavelengths of the R wavelengths, port information of the first ONU corresponding to a first optical splitter, where a first branch end of the first optical splitter corresponds to the at least two wavelengths.

With reference to the third aspect, in a possible implementation manner, the optical power values of the optical signals corresponding to the R wavelengths are smaller than a first preset value; or, the optical power values of the optical signals corresponding to the R wavelengths are greater than a second preset value.

With reference to the third aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the R wavelengths are wavelengths corresponding to minimum R optical power values among optical power values of the optical signals with the M wavelengths; alternatively, the R wavelengths are wavelengths corresponding to the maximum R values of optical power among the values of optical power of the optical signals of the M wavelengths.

With reference to the third aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, when there is a difference greater than a third preset threshold in differences between values of optical powers of the optical signals with the M wavelengths, the R wavelengths are wavelengths corresponding to minimum values of R optical powers in the values of optical powers of the optical signals with the M wavelengths; or, when there is a difference greater than a third preset threshold in the differences between the values of the optical powers of the optical signals with the M wavelengths, the R wavelengths are the wavelengths corresponding to the largest R values of the optical powers of the optical signals with the M wavelengths.

With reference to the third aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the OLT is specifically configured to: when the difference between the value of the first optical power and the value of the second optical power is greater than a third preset value and the value of the first optical power is greater than the value of the second optical power, the OLT determines that the wavelength of the optical signal corresponding to the value of the second optical power is the wavelength corresponding to the first ONU, and the value of the first optical power and the value of the second optical power are any two of the values of the optical powers of the optical signals with the M wavelengths; or when the difference between the first optical power value and the second optical power value is greater than a third preset value and the first optical power value is greater than the second optical power value, the OLT determines that the wavelength of the optical signal corresponding to the first optical power value is the wavelength corresponding to the first ONU, and the first optical power value and the second optical power value are any two of the optical power values of the optical signals with the M wavelengths.

With reference to the third aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, a reflection point is disposed at the first branch end, where the reflection point is used to reflect the optical signals with the at least two wavelengths, or the reflection point is used to reflect the optical signals with wavelengths other than the at least two wavelengths in the M wavelengths.

With reference to the third aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the optical signals with M wavelengths and the at least one feedback information are carried in a PLOAM message, an OMCI message, or a data channel.

In a fourth aspect, the present application provides a passive optical network PON system, comprising: an optical line terminal OLT and at least one optical network unit ONU; the OLT is configured to send optical signals with M wavelengths to the at least one ONU, where the M wavelengths are different from each other, and M is an integer greater than 1; a first ONU of the at least one ONU is configured to determine, according to a value of optical power of the optical signal with the M wavelengths received, R wavelengths corresponding to the first ONU, where R is an integer greater than or equal to 2; the first ONU is further configured to determine, according to at least two wavelengths of the R wavelengths, port information of the first ONU corresponding to the first optical splitter, where a first branch end of the first optical splitter corresponds to the at least two wavelengths; the first ONU is further configured to send feedback information to the OLT, where the feedback information is used to indicate the port information; and the OLT is used for determining the port information according to the feedback information.

With reference to the fourth aspect, in a possible implementation manner, the optical power values of the optical signals corresponding to the R wavelengths are smaller than a first preset value; or, the optical power values of the optical signals corresponding to the R wavelengths are greater than a second preset value.

With reference to the fourth aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the R wavelengths are wavelengths corresponding to minimum R optical power values among the optical power values of the optical signals with the M wavelengths; alternatively, the R wavelengths are wavelengths corresponding to the maximum R values of optical power among the values of optical power of the optical signals of the M wavelengths.

With reference to the fourth aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, when there is a difference greater than a third preset threshold in differences between values of optical powers of the optical signals with the M wavelengths, the R wavelengths are wavelengths corresponding to minimum R values of optical powers in the values of optical powers of the optical signals with the M wavelengths; or, when there is a difference greater than a third preset threshold in the differences between the values of the optical powers of the optical signals with the M wavelengths, the R wavelengths are the wavelengths corresponding to the largest R values of the optical powers of the optical signals with the M wavelengths.

With reference to the fourth aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the first ONU is specifically configured to: when the difference value between the first optical power value and the second optical power value is greater than a third preset value and the first optical power value is greater than the second optical power value, determining that the wavelength of the optical signal corresponding to the second optical power value is the wavelength corresponding to the first ONU, and the first optical power value and the second optical power value are any two of the optical power values of the optical signals with the M wavelengths; or when the difference between the value of the first optical power and the value of the second optical power is greater than a third preset value and the value of the first optical power is greater than the value of the second optical power, determining that the wavelength of the optical signal corresponding to the value of the first optical power is the wavelength corresponding to the first ONU, and determining that the value of the first optical power and the value of the second optical power are any two of the values of the optical powers of the optical signals with the M wavelengths.

With reference to the fourth aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, a reflection point is disposed at the first branch end, where the reflection point is used to reflect the optical signals with the at least two wavelengths, or the reflection point is used to reflect the optical signals with wavelengths other than the at least two wavelengths in the M wavelengths.

With reference to the fourth aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the optical signals with M wavelengths and the feedback information are carried in a PLOAM message, an OMCI message, or a data channel.

In a fifth aspect, the present application provides an optical splitter, comprising: each first branch end of the N first branch ends is provided with a reflection point, the reflection point of each first branch end is used for reflecting optical signals with multiple wavelengths, the wavelengths of at least one optical signal between any two optical signals which are used for being reflected by the reflection points of the first branch ends are different, and N is an integer larger than 0.

In the above technical solution, the optical splitter includes a branch end for reflecting optical signals with multiple wavelengths, so that different branch ends can be distinguished by combining multiple wavelengths, thereby implementing free combination with a small number of wavelengths, defining a large number of branch ends of the optical splitter, helping to avoid a problem of insufficient number of monitoring wavelengths due to limitation of a monitoring wavelength range, and helping to accurately determine a connection relationship between the ONU and the branch end of the optical splitter.

With reference to the fifth aspect, in a possible implementation manner, the optical splitter further includes: the optical fiber coupler comprises K second branch ends, wherein each of the K second branch ends is provided with a reflection point, the reflection point of each second branch end is used for reflecting an optical signal with one wavelength, the wavelengths of the optical signals which are used for reflection by the reflection points of any two second branch ends are different, and K is an integer larger than 0.

In the above technical solutions, the optical splitter may further include a branch end for reflecting an optical signal of one wavelength, so that there may be more combinations for the same number of wavelengths, and the requirement for monitoring the number of wavelengths may be further reduced.

With reference to the fifth aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the optical splitter further includes: a third branch end, the third branch end not provided with a reflection point.

In the above technical solutions, the optical splitter may further include a branch end that does not reflect the optical signal of any one wavelength, so that there may be more combinations for the same number of wavelengths, and the requirement for monitoring the number of wavelengths may be further reduced.

With reference to the fifth aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, one reflection point is respectively disposed at N1 first branch ends of the N first branch ends, and the one reflection point is used to reflect the optical signals with multiple wavelengths.

With reference to the fifth aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, a plurality of reflection points are respectively disposed on N2 first branch ends of the N first branch ends, and the plurality of reflection points are used to reflect the optical signals with the plurality of wavelengths.

With reference to the fifth aspect and any one of the foregoing possible implementation manners, in another possible implementation manner, the reflection point is formed by etching a grating on the branch end and/or plating a film on an end face of the branch end.

In a sixth aspect, the present application provides an OLT, which includes a module configured to implement the method according to the first aspect or any one of the possible implementation manners of the first aspect.

In a seventh aspect, the present application provides an ONU, where the ONU includes a module configured to implement the method according to the second aspect or any one of the possible implementation manners of the second aspect.

In an eighth aspect, the present application provides an OLT, where the OLT includes a processor and a communication interface, the processor and the interface circuit are coupled to each other, the communication interface is configured to communicate with other devices, and the processor is configured to implement the method according to the first aspect or any one of the implementation manners of the first aspect.

In a possible implementation manner, the OLT further includes a memory, configured to store instructions executed by the processor or input data required by the processor to execute the instructions or data generated after the processor executes the instructions.

In a ninth aspect, the present application provides an ONU, where the ONU includes a processor and a communication interface, where the processor and the interface circuit are coupled to each other, the communication interface is configured to communicate with other devices, and the processor is configured to implement the method according to the first aspect or any one of the implementation manners of the first aspect.

In a possible implementation manner, the ONU further includes a memory, configured to store an instruction executed by the processor, or store input data required by the processor to execute the instruction, or store data generated after the processor executes the instruction.

In a tenth aspect, the present application provides a port detection apparatus, where the port detection apparatus may be applied to an OLT or an ONU, and the port detection apparatus is coupled to a memory, and is configured to read and execute an instruction stored in the memory, so that the port detection apparatus implements the method according to the first aspect or any implementation manner of the first aspect, or implements the method according to any implementation manner of the second aspect or any implementation manner of the second aspect.

In one possible design, the port detection device is a chip or a system on a chip.

In an eleventh aspect, the present application provides a chip, where the chip includes a processor and a communication interface, where the processor and the interface circuit are coupled to each other, the communication interface is configured to communicate with other devices, and the processor is configured to implement the method according to the first aspect or any one of the implementation manners of the first aspect, or implement the method according to any one of the implementation manners of the second aspect or the second aspect.

In a possible implementation manner, the chip further includes a memory, configured to store instructions executed by the processor or input data required by the processor to execute the instructions or data generated after the processor executes the instructions.

In a twelfth aspect, embodiments of the present application provide a computer program product, which includes computer instructions that, when executed, cause a method in the foregoing first aspect or any possible implementation manner of the first aspect to be performed, or cause a method in the foregoing second aspect or any possible implementation manner of the second aspect to be performed.

In a thirteenth aspect, the present application provides a computer-readable storage medium storing computer instructions that, when executed, cause a method in the foregoing first aspect or any possible implementation manner of the first aspect to be performed, or cause a method in the foregoing second aspect or any possible implementation manner of the second aspect to be performed.

Based on the above, in the embodiment of the present application, the branch end of the optical splitter transmits or transmits at least two different wavelengths, and the ONU determines a branch end through at least two different wavelengths, so that the branch ends of a large number of optical splitters can be defined through a free combination of a small number of wavelengths, and further, the connection relationship between the ONU and the branch end of the optical splitter is accurately determined.

Drawings

Fig. 1 is a schematic diagram of a PON system architecture to which the technical solution of the embodiment of the present application can be applied.

Fig. 2 is a schematic diagram of a structure of a beam splitter.

Fig. 3 is a schematic diagram of a port detection method.

Fig. 4 is a schematic flow chart of a port detection method according to an embodiment of the present application.

Fig. 5 is an example of a PON system according to an embodiment of the present application.

Fig. 6 is an example of a port detection flow according to an embodiment of the present application.

Fig. 7 is another example of a PON system according to an embodiment of the present application.

Fig. 8 is a schematic flow chart of a port detection method according to another embodiment of the present application.

Fig. 9 is another example of a port detection flow according to an embodiment of the present application.

Fig. 10 is a schematic structural diagram of a port detection apparatus according to an embodiment of the present application.

Fig. 11 is a schematic structural diagram of a port detection apparatus according to another embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a PON system architecture to which the technical solution of the embodiment of the present application can be applied. The PON system shown in fig. 1 may include an Optical Line Terminal (OLT), an Optical Distribution Network (ODN), and at least one Optical Network Unit (ONU), where the ONU may also be replaced by an Optical Network Terminal (ONT).

The ODN may comprise at least one splitter (splitter) and may further comprise optical fibers, in particular, trunk fibers (feed fibers), distribution fibers (distribution fibers) and drop fibers (drop fibers). The trunk optical fiber is an optical fiber connected with the OLT and the ODN; the distribution optical fiber and the branch optical fiber may also be collectively referred to as a branch optical fiber, the branch optical fiber is an optical fiber connected between the optical splitter and the accessed ONU, and the distribution optical fiber is an optical fiber connected between the optical splitters in the ODN. When the ODN is first-order split (i.e., has only one-order splitter), only the trunk fiber and the branch fiber, and no distribution fiber, are present in the ODN; when the ODN is a two-stage optical splitter (i.e., having a first-stage optical splitter and a second-stage optical splitter) or an optical splitter with more than two stages (i.e., having a first-stage optical splitter and a second-stage optical splitter, …, an M-stage optical splitter), the ODN includes a trunk optical fiber, a multi-stage distribution optical fiber, and a branch optical fiber. For example, the ODN of fig. 1 is a two-stage optical splitter, and the ODN includes a trunk fiber, a multi-stage distribution fiber, and a branch fiber.

The ONU is configured to receive data transmitted from the OLT, respond to a management command from the OLT, buffer ethernet data of a user, and transmit the ethernet data in an uplink direction in a transmission window allocated by the OLT, and the like. The ONU may specifically include a Bi-direction Optical Subassembly (BOSA), and the BOSA may specifically include a Transmitter Optical Subassembly (TOSA) and a Receiver Optical Subassembly (ROSA). A TOSA may be used to transmit optical signals and a ROSA may be used to receive optical signals.

The OLT is a core component of the optical access network, and the OLT is used to provide data for one or more ONUs accessed, and to provide management and the like. The OLT may be configured to send an optical signal to at least one ONU, receive information fed back by the ONU, and process the information or other data fed back by the ONU.

The PON specifically may include a Gigabit Passive Optical Network (GPON), an Ethernet Passive Optical Network (EPON), a 10G Gigabit-capable passive optical network (10G-cable passive optical network, XGPON), a 10G Ethernet passive optical network (10G Ethernet passive optical network, 10G EPON), and the like, where the XGPON and the 10G EPON may be collectively referred to as a 10G PON. .

In a PON system, uplink and downlink optical signals may be transmitted in the same optical fiber by Time Division Multiplexing (TDM). The OLT may broadcast data in the form of optical signals through the laser and transmit the data to the ONUs accessing the ODN. If the wavelength of the optical signal transmitted in the downstream direction (from OLT to ONU) is lambda₁The wavelength of the optical signal transmitted in the upstream direction (from the ONU to the OLT) is lambda₂Then the wavelength is λ₁Optical signal of and wavelength of lambda₂The optical signals can be transmitted in the same optical fiber in different time slots respectively. For example, as shown in FIG. 1, the wavelength in the downstream direction is λ₁The optical network unit works in a TDM mode, and data sent by the OLT can be broadcasted to all branch optical fibers and can reach all the ONU; wavelength in upstream direction is λ₂Operating in a Time Division Multiple Access (TDMA) mode, the ONU transmits only in authorized time slots. In general, in a GPON system, 1310nm wavelength is used for the upstream, and 1490nm wavelength is used for the downstream. The 10G PON system adopts the wavelength of 1270nm in the uplink and 1577nm in the downlink. Of course, the upstream and downstream optical signals may be transmitted using different optical fibers.

In addition, the PON system may also establish a connection with a public switched telephone network (PTSN), the internet (internet), or a cable television (CATV) network or device.

It should be understood that at least one ONU in fig. 1 may include an Optical Network Terminal (ONT), a multiplexing unit (MXU), and the like. The at least one ONU may also be replaced with at least one ONT, or at least one device connected to the ODN may simultaneously include the ONU and the ONT. In this application, the steps performed by the ONU may be performed by the ONT instead.

Fig. 2 is a schematic diagram of a structure of a beam splitter. As shown in fig. 2, the splitting ratio of the splitter is 1: n, i.e. one common terminal C1, N branch terminals (P1, …, PN), N being a positive integer. In the PON network, the common port C1 of the optical splitter may be used to connect to the OLT through a trunk fiber or to connect to the branch ports of the first-stage optical splitter, and each of the branch ports (P1, …, PN) of the optical splitter may be connected to one ONU through a branch fiber or to the common port of the next-stage optical splitter.

The spectrometer may also be a spectrometer with other splitting ratios, for example, a splitting ratio of 2: n, 4: n beam splitters, and the like. The optical splitter with which structure is specifically adopted can be adjusted according to the actual application scene, and the application does not limit the optical splitter.

For example, as shown in fig. 3, the ODN implements first-order splitting by an optical splitter having a splitting ratio of 1:32, and each branch of the optical splitter reflects an optical signal of a specific wavelength in the monitoring wavelength range and transmits an optical signal of another wavelength. The emission wavelength of the tunable laser is lambda₁～λ₃₂Optical signal of ONU with reception wavelength of lambda₁～λ₃₂The optical signal of (1). When the ONU1 is used for reflecting the wavelength lambda₁When the branch ends of the optical signals are connected, the branch ends of the optical splitter have a wavelength of lambda₁The ONU1 cannot receive the optical signal of λ because the optical signal of (a) is reflected and transmits the optical signal of the other wavelength₁Of the optical signal or the received wavelength is lambda₁The optical power of the received optical signal is low, while the values of the optical power of the received optical signals of other wavelengths are normal. By analogy, the ONU32 cannot receive the wavelength λ₃₂Of the optical signal or the received wavelength is lambda₃₂The optical power of the received optical signal is low, while the values of the optical power of the received optical signals of other wavelengths are normal. Based on this, ONU N (N ═ 1, …, 32) and wavelength λ are known_nAccording to the corresponding relationship between the wavelength and the branch end of the optical splitter when the optical splitter is factory set, the corresponding relationship between the branch end of the optical splitter and the ONU can be known.

Since the splitter has 32 branch ends, 32 optical signals of different wavelengths are required. However, because Programmable Logic Controllers (PLCs) operate at-40 ℃ to 85 ℃ and the grating wavelength shifts 0.01 nm/DEG C, for optical signals of a particular wavelength to be reflected and optical signals of other wavelengths to be transmitted, the reflection bandwidth needs to be greater than >1.25nm, while taking into account the wavelength shift of the tunable laser +/-3GHz, the reflection grating fabrication variation 0.2nm, the reflection bandwidth of each wavelength being at least 1.6nm, the passband edge spacing being at least 0.4nm, so that each reflection wavelength spacing is at least 2nm, and then 64 nm. The standard definition can be used only when the monitoring wave band is more than 1625nm, and the wavelength range of an Optical Time Domain Reflectometer (OTDR) is 1650nm +/-5nm, which means that the wave band range of the adjustable laser can only be 1625nm to 1645nm, and 1625nm to 1689nm is required according to the analysis.

That is, due to the limitation of the monitoring wavelength range, in some cases, it is not possible to allocate enough wavelengths to the optical splitter to distinguish different branch ends of the optical splitter, and thus the connection relationship between the ONU and the branch end of the optical splitter cannot be accurately determined.

In order to solve the above problem, embodiments of the present application provide a port detection method and apparatus. In the present application, a reflection point for reflecting optical signals of a plurality of wavelengths may be provided at a branch end of at least one optical splitter in the ODN. Since the reflection point at the branch end of the optical splitter can reflect optical signals of multiple wavelengths, different branch ends of the optical splitter can be distinguished by different wavelength combinations. In this way, a free combination with a small number of wavelengths can be achieved, defining a large number of branch ends of the splitter. Further, the OLT or the ONU may determine the reflection wavelength of the branch end of the optical splitter corresponding to the ONU by analyzing the optical power of the optical signal received by the ONU, and then determine the correspondence between the ONU and the branch ends of the optical splitters according to the correspondence between the reflection wavelength and the branch end of the optical splitter.

The optical splitter provided in the embodiments of the present application will be described first.

In some embodiments, the optical splitter may include N first branch ends. Each of the N first branch ends is provided with a reflection point. The reflection point of each first branch end is used for reflecting optical signals with multiple wavelengths, the wavelength of at least one optical signal is different between the optical signals used for reflection by the reflection points of any two first branch ends, and N is an integer larger than 0.

In this way, the N different first branch ends of the optical splitter can be distinguished by different wavelength combinations.

Take the first branch end for reflecting the optical signals with two wavelengths as an example.

For example, as shown in Table 1, the optical splitter includes branch ends 7-16, and the branch ends 7-16 are all the first branch ends passing through λ₃～λ₈Any two wavelengths in the wavelength range are divided into branch ends 7-16. Wherein the wavelength corresponding to the branch end is the wavelength for reflection at the branch end, e.g. branch end 7 corresponds to λ₃λ₄Meaning that the branch end 7 is used for a wavelength λ₃And λ₄Is reflected. In this way, a passing through of λ can be achieved₃～λ₈The optical signal area branch ends of six wavelengths are 7-16 branch ends, and the total number is 10 branch ends.

TABLE 1

Port(s)	1	2	3	4	5	6	7	8
									Encoding	λ₃	λ₄	λ₅	λ₆	λ₇	λ₈	λ₃λ₄	λ₃λ₅
Port(s)	9	10	11	12	13	14	15	16
									Encoding	λ₃λ₆	λ₃λ₇	λ₃λ₈	λ₄λ₅	λ₄λ₆	λ₄λ₇	λ₄λ₈	λ₅λ₆

For another example, as shown in Table 2, the splitter includes branch ends 9-32, and the branch ends 9-32 are all the first branch ends passing through λ respectively₁～λ₈Any two wavelengths in the wavelength range are divided into branch ends 9-32. Wherein the wavelength corresponding to the branch end is the wavelength for reflection at the branch end, e.g. branch end 9 corresponds to λ₁λ₂Meaning that the branch end 9 is used for a wavelength λ₁And λ₂Is reflected. In this way, a passing through of λ can be achieved₁～λ₈The optical signal area branch ends 9-32 with eight wavelengths have 24 branch ends.

TABLE 2

Port(s)	1	2	3	4	5	6	7	8
									Encoding	λ₁	λ₂	λ₃	λ₄	λ₅	λ₆	λ₇	λ₈
Port(s)	9	10	11	12	13	14	15	16
									Encoding	λ₁λ₂	λ₁λ₃	λ₁λ₄	λ₁λ₅	λ₁λ₆	λ₁λ₇	λ₁λ₈	λ₂λ₃
Port(s)	17	18	19	20	21	22	23	24
									Encoding	λ₂λ₄	λ₂λ₅	λ₂λ₆	λ₂λ₇	λ₂λ₈	λ₃λ₄	λ₃λ₅	λ₃λ₆
Port(s)	25	26	27	28	29	30	31	32
									Encoding	λ₃λ₇	λ₃λ₈	λ₄λ₅	λ₄λ₆	λ₄λ₇	λ₄λ₈	λ₅λ₆	λ₅λ₇

Take the first branch end for transmitting the optical signals with two wavelengths as an example.

For example, as shown in Table 1, the optical splitter includes branch ends 7-16, and the branch ends 7-16 are all the first branch ends passing through λ₃～λ₈Any two wavelengths in the wavelength range are divided into branch ends 7-16. Wherein the wavelength corresponding to the branch end is the wavelength that the branch end uses for transmission, e.g. branch end 7 corresponds to λ₃λ₄Meaning that the branch end 7 is used for a wavelength λ₃And λ₄Is transmitted. In this way, a passing through of λ can be achieved₃～λ₈The optical signal area branch ends of six wavelengths are 7-16 branch ends, and the total number is 10 branch ends.

For another example, as shown in Table 2, the splitter includes branch ends 9-32, and the branch ends 9-32 are all the first branch ends passing through λ respectively₁～λ₈Any two wavelengths in the wavelength range are divided into branch ends 9-32. WhereinThe wavelength corresponding to the branch end is the wavelength for reflection at the branch end, e.g. branch end 9 corresponds to λ₁λ₂Meaning that the branch end 9 is used for a wavelength λ₁And λ₂Is transmitted. In this way, a passing through of λ can be achieved₁～λ₈The optical signal area branch ends 9-32 with eight wavelengths have 24 branch ends.

Alternatively, the first branch end may reflect the optical signals with multiple wavelengths through one reflection point.

Optionally, the first branch end may reflect the optical signals with multiple wavelengths through multiple reflection points.

In other embodiments, the splitter may further include K second branch ends. Each of the K second branch ends is provided with a reflection point. The reflection point of each second branch end is used for reflecting the optical signal with one wavelength, the reflection points of any two second branch ends are used for reflecting the optical signals with different wavelengths, and K is an integer larger than 0.

For example, the branch ends 1-6 are shown in Table 1. In this way, a passing through of λ can be achieved₃～λ₈The optical signal area branch end of six wavelengths is 1 ~ 16 branch ends total 16 branch ends.

Also, for example, the branch ends 1-8 are shown in Table 2. In this way, a passing through of λ can be achieved₁～λ₈The optical signal area branch ends of eight wavelengths are 1-32 branch ends, and the number of the branch ends is 32.

In other embodiments, the splitter may further include a third branch end, and the third branch end is not provided with a reflection point.

That is, the optical splitter may include a branch end that does not reflect optical signals of any wavelength.

In some possible implementations, the reflection point may be formed by etching a grating on the branch end of the optical splitter and/or plating an end face of the branch end.

Table 1 and table 2 are merely examples, and do not limit the embodiments of the present application. For example, the first branch end may also be used to reflect optical signals of other numbers of wavelengths. For another example, the respective branch ends may have other correspondence with the wavelengths.

In this application, the correspondence between each branch end of the optical splitter and the wavelength may be preconfigured in the OLT or the ONU, so that the OLT or the ONU determines the correspondence between the ONU and the branch end of each optical splitter according to the correspondence. For example, the OLT or the ONU may store therein a correspondence table in the form shown in table 1 and table 2.

The following describes a port detection method according to an embodiment of the present application. In the method for port detection in the embodiment of the present application, port detection may be performed by an OLT, or may be performed by an ONU.

The method of port detection by the OLT is first described below.

Fig. 4 is a schematic flow chart of a port detection method according to an embodiment of the present application. The method shown in fig. 4 is applicable to a PON system, and an ODN of the PON system includes a first branch end of a first optical splitter of at least one optical splitter for reflecting or transmitting optical signals of at least two different wavelengths.

At 410, the OLT sends optical signals of M wavelengths to at least one ONU, the M wavelengths being different from each other.

Accordingly, at least one ONU receives optical signals of M wavelengths.

At least one ONU is an ONU accessing the PON system.

For convenience of description, the following describes an embodiment of the present application by taking a first ONU in at least one ONU as an example. It should be understood that the first ONU may be any one of at least one ONU accessing the PON system.

In general, the M wavelengths for port detection are different from the wavelength band for data transmission between the OLT and the ONU, and the optical signals of the M wavelengths for port detection may be hereinafter referred to as monitor light, and the optical signals for data transmission between the OLT and the ONU may be hereinafter referred to as service light. The monitoring light and the service light may be transmitted by different lasers, and hereinafter, the laser transmitting the monitoring light is referred to as a monitoring laser, and the laser transmitting the service light is referred to as a service laser. In some embodiments, the detection light and the service light may be multiplexed by a Wavelength Division Multiplexing (WDM) multiplexer. Specifically, the optical fiber between the service laser and the WDM combiner only passes service light, the monitoring laser and the WDM combiner only passes monitoring light, and the service light and the monitoring light are combined into one trunk optical fiber through the WDM. The interaction of the service laser and the monitoring laser with the ONU may be realized by scheduling of a management system (e.g., a Network Cloud Engine (NCE) system).

The embodiment of the present application does not specifically limit the manner in which the OLT sends the optical signals with M wavelengths. As an example, the OLT may broadcast optical signals of M wavelengths in sequence by monitoring the lasers. As another example, the OLT may broadcast optical signals of M wavelengths simultaneously by monitoring the lasers.

The monitoring laser can be a tunable laser and can emit optical signals with different wavelengths; or may be comprised of multiple lasers emitting different wavelengths. Alternatively, the monitoring laser may be integrated in the OLT, so that the OLT may directly control the monitoring laser to transmit the optical signal. Alternatively, the monitoring laser may be provided separately from the OLT, and the OLT may control the monitoring laser to emit the optical signal by sending a control signal directly to the monitoring laser or by sending a control signal to a management system (e.g., NCE system, etc.). It should be understood that the specific arrangement of the monitoring laser may be adjusted according to the actual application scenario, and the present application does not limit this.

It should be noted that, when the laser is set independently from the OLT, the laser may be a part of the OLT system, and therefore, in the embodiment of the present application, it is described collectively that the OLT sends optical signals with M wavelengths to at least one ONU.

The laser device of the embodiment of the present application may include a Distributed Bragg Reflector (DBR) laser device, a Direct Modulated Laser (DML) laser device, and the like.

In some embodiments, the OLT or management system needs to acquire the M wavelengths before the monitoring laser sends the optical signal of M wavelengths to the first ONU. In a possible implementation manner, the M wavelengths may be determined according to a specific setting condition of an optical splitter in an ODN in the PON system. For example, the required wavelengths are known through the preliminary planning of network construction, and the determined wavelengths are input to the OLT or the management system after the network construction is completed; when the OLT or the management system needs to drive the monitoring laser to emit the optical signal so as to carry out port detection, the OLT or the management system drives the monitoring laser to emit the optical signal according to the wavelength configured in advance.

For example, assume that the ODN is a two-stage splitter, and the one-stage splitter is a splitter with a splitting ratio of 1: 4, and the second-stage optical splitter has a splitting ratio of 1: the beam splitter of 16 is an example. For split ratio of 1: 4, can be freely combined by 2 different wavelengths (four branch ends can respectively correspond to lambda)₁Optical signal of (a)₂Optical signal of (a)₁And λ₂And not reflecting the optical signal) are distinguished; for a splitter with a splitting ratio of 1:16, it can be distinguished by a free combination of 6 different wavelengths. Therefore, 8 different wavelengths are required for this ODN. The 8 different wavelengths may be configured in advance in the OLT or management system. When the OLT or the management system needs to drive the monitoring laser to emit an optical signal so as to perform port detection, the OLT or the management system determines that the 8 optical signals with different wavelengths need to be transmitted, and drives the monitoring laser to emit an optical signal.

In some embodiments, before the OLT sends the optical signal of the first wavelength of the M wavelengths to the first ONU, the OLT may send information of the first wavelength to the first ONU in order for the first ONU to determine the wavelength of the optical signal to be received. Wherein the first wavelength is any one of M wavelengths.

In other embodiments, when the OLT sends the optical signal of the first wavelength of the M wavelengths to the first ONU, the optical signal of the first wavelength may be encoded so that the optical signal of the first wavelength carries information of the first wavelength, so that the first ONU determines the wavelength of the received optical signal. Wherein the first wavelength is any one of M wavelengths. In addition, encoding the optical signal at the first wavelength also helps to distinguish the optical signal at the first wavelength from noise light.

In 420, the first ONU sends at least one feedback information to the OLT, where the at least one feedback information is used to indicate R wavelengths corresponding to the first ONU, and R is a positive integer greater than or equal to 2.

Accordingly, the OLT receives at least one feedback information from the first ONU.

Alternatively, the R wavelengths corresponding to the first ONU may be optical signals reflected by reflection points at the branch ends of the optical splitter among optical signals of M wavelengths transmitted from the OLT to the first ONU.

Alternatively, the R wavelengths corresponding to the first ONU may be optical signals that are not reflected by reflection points at branch ends of the optical splitter among optical signals of the M wavelengths transmitted from the OLT to the first ONU.

In some embodiments, the at least one feedback information may comprise values of optical power of the optical signal at the M wavelengths. That is, the first ONU feeds back to the OLT the values of the optical powers of the optical signals of M wavelengths it receives. Optionally, the at least one feedback information may include information of M optical power values and M wavelengths, and the M optical power values correspond to the information of M wavelengths one to one.

In further embodiments, the at least one feedback message includes information on R wavelengths, the R wavelengths being information on R wavelengths corresponding to the first ONU. Alternatively, the information of the wavelength may be identification information of the wavelength, for example, λ₁～λ₈The marks are 0001-0008 respectively.

Optionally, from the OLT to the first ONU, a part of optical signals in the optical signals with M wavelengths sent by the OLT is reflected in the ODN, an optical power value of the part of optical signals received by the first ONU is lower or 0, and the wavelengths of the part of optical signals are the R wavelengths corresponding to the first ONU.

For example, taking the example of two-stage optical splitting between the OLT and the first ONU, the first ONU accesses to the PON system through the branch end 1 of the first-stage optical splitter and the branch end 1 of the second-stage optical splitter, and it is assumed that the reflection point of the branch end 1 of the first-stage optical splitter is used for reflecting λ₁For reflecting lambda, the reflection point of the branch end 2 of the secondary splitter being used to reflect lambda₃And λ₄R wavelengths are λ₁、λ₃And λ₄。

Optionally, from the OLT to the first ONU, part of the optical signals with M wavelengths sent by the OLT is reflected in the ODN, the optical power value of the part of the optical signals received by the first ONU is lower or 0, and the wavelengths of the optical signals with M wavelengths other than the part of the optical signals are the R wavelengths corresponding to the first ONU.

For example, taking the case where the first-order splitting is performed between the OLT and the first ONU, the OLT transmits λ₁～λ₈The first ONU accesses the PON system through the branch end 1 of the optical splitter, assuming that the reflection point of the branch end 1 of the optical splitter is used to reflect λ₁～λ₆I.e. branch end 1 to lambda₇～λ₈R wavelengths are λ₇～λ₈。

In case the at least one feedback information comprises information of R wavelengths, the first ONU may perform step 450, i.e. the first ONU determines the R wavelengths.

In one possible implementation, when the R wavelengths are wavelengths of optical signals reflected by a reflection point at a branch end of the optical splitter, the first ONU compares a value of optical power of the received optical signals with a first preset threshold. Since part of the optical signals with M wavelengths sent by the OLT from the OLT to the first ONU will be reflected by the reflection point at the branch end of the optical splitter, the optical power value of the part of the optical signals received by the first ONU will be lower or 0. When the value of the optical power of the received optical signal is smaller than the first preset threshold, the optical signal is the reflected optical signal. Therefore, when the value of the optical power of the received optical signal is less than the first preset threshold, the first ONU determines that the wavelength of the optical signal is one of the wavelengths corresponding to the first ONU.

In one possible implementation manner, when the R wavelengths are wavelengths of optical signals transmitted by the branch end of the optical splitter, the first ONU compares a value of optical power of the received optical signals with a second preset threshold. Since part of the optical signals with M wavelengths sent by the OLT from the OLT to the first ONU will be reflected by the reflection point at the branch end of the optical splitter, the optical power value of the part of the optical signals received by the first ONU will be lower or 0. And when the value of the optical power of the received optical signal is greater than a second preset threshold value, the optical signal is an unreflected optical signal. Therefore, when the value of the optical power of the received optical signal is greater than the second preset threshold, the first ONU determines that the wavelength of the optical signal is one of the wavelengths corresponding to the first ONU.

In another possible implementation manner, when the R wavelengths are wavelengths of optical signals reflected by a reflection point at a branch end of the optical splitter, after receiving the optical signals with the M wavelengths, the first ONU compares optical powers of the M optical signals obtained. And if the difference value between two optical power values in the M optical power values is larger than a third preset threshold value, determining that the smaller optical power value is one of the wavelengths corresponding to the first ONU, and sequentially comparing until the R wavelengths are determined.

In another possible implementation manner, when the R wavelengths are wavelengths of optical signals transmitted by the branch end of the optical splitter, after receiving the optical signals with the M wavelengths, the first ONU compares optical powers of the M optical signals obtained. And if the difference value between two optical power values in the M optical power values is larger than a third preset threshold value, determining that the larger optical power value is one of the wavelengths corresponding to the first ONU, and sequentially comparing until the R wavelengths are determined.

In another possible implementation manner, when the R wavelengths are wavelengths of optical signals reflected by a reflection point at a branch end of the optical splitter, if each ONU corresponds to the R wavelengths, after the first ONU receives the optical signals with the M wavelengths, the values of the M optical powers may be sorted from small to large, and the R wavelength corresponding to the value of the first R optical powers is determined to be the R wavelengths corresponding to the first ONU.

In another possible implementation manner, when R wavelengths are wavelengths of optical signals transmitted by a branch end of the optical splitter, if each ONU corresponds to R wavelengths, after the first ONU receives the optical signals with M wavelengths, the values of the M optical powers may be sorted from small to large, and it is determined that the R wavelength corresponding to the value of the R optical power is the R wavelengths corresponding to the first ONU.

In another possible implementation manner, when the R wavelengths are wavelengths of optical signals reflected by a reflection point at the branch end of the optical splitter, if each ONU corresponds to the R wavelengths, the first ONU compares optical powers of the M optical signals obtained after receiving the optical signals with the M wavelengths. And if the difference between the M optical power values is larger than the difference of a third preset threshold, determining that the wavelength corresponding to the minimum R optical power values in the optical power values is the R wavelengths.

In another possible implementation manner, when the R wavelengths are wavelengths of optical signals transmitted by the branch end of the optical splitter, if each ONU corresponds to the R wavelengths, the first ONU compares optical powers of the M optical signals obtained after receiving the optical signals with the M wavelengths. And if the difference between the M optical power values is larger than the difference of a third preset threshold, determining that the wavelength corresponding to the minimum R optical power values in the optical power values is the R wavelengths.

In one possible embodiment, the first ONU further transmits to the OLT identification information of the first ONU, e.g. the first ONU's identification number, device name, etc. For example, the identification information may include an identification number allocated by the OLT to the ONU, or an existing identification number of the ONU.

In a possible implementation manner, the identification information of the first ONU may be sent to the OLT by the first ONU alone, or may be included in the at least one feedback information and sent to the OLT, so that the OLT may recognize that the at least one feedback information is fed back by the first ONU according to the identification information. For example, when the first ONU transmits the optical power information to the OLT, the optical power information may carry identification information of the first ONU; or when the first ONU sends the port information to the OLT, the port information may carry identification information of the first ONU.

The embodiment of the present application does not specifically limit the manner in which the first ONU transmits the at least one feedback information.

In some embodiments, the first ONU transmits a plurality of feedback information to the OLT indicating the R wavelengths corresponding to the first ONU.

As an example, each of the plurality of feedback information respectively corresponds to an optical signal of one wavelength. For example, the first ONU may feed back the value of the optical power of the optical signal to the OLT after receiving the optical signal with one wavelength, and transmit M pieces of feedback information to the OLT when at least one piece of feedback information includes the values of the optical powers of the optical signals with M wavelengths. For another example, in a case where the at least one feedback information includes information of R wavelengths or a value of optical power, the first ONU may transmit the R feedback information to the OLT.

As another example, each of the plurality of feedback information respectively corresponds to a plurality of wavelengths of the optical signal. Taking an example that each piece of feedback information corresponds to an optical signal with 2 wavelengths respectively, the first ONU may feed back the value of the optical power of the 2 optical signals to the OLT after receiving the optical signals with 2 wavelengths, and send M/2 pieces of feedback information to the OLT when at least one piece of feedback information includes the value of the optical power of the optical signal with M wavelengths; in case the at least one feedback information comprises information of R wavelengths or a value of optical power, the first ONU may send R/2 feedback information to the OLT.

In other embodiments, the first ONU may further send a feedback message to the OLT indicating the R wavelengths corresponding to the first ONU. For example, after receiving the optical signals with M wavelengths, the first ONU feeds back the values of the optical powers of the optical signals with M wavelengths to the OLT through one piece of feedback information. For another example, after receiving the optical signals with M wavelengths, the first ONU determines R wavelengths corresponding to the first ONU, and then feeds back information of the R wavelengths corresponding to the first ONU to the OLT by one piece of feedback information.

At 430, the OLT determines R wavelengths corresponding to the first ONU according to the at least one feedback information.

In some embodiments, when the at least one feedback information may include values of optical powers of optical signals with M wavelengths, the OLT determines the R wavelengths, and a specific implementation manner is the same as or similar to the determination manner of the first ONU, which may refer to the related description in step 450 and is not described herein again.

In other embodiments, when the at least one feedback message includes information of R wavelengths, the OLT may determine the R wavelengths corresponding to the first ONU directly according to the information of R wavelengths.

In 440, the OLT determines port information of the first ONU corresponding to the first optical splitter according to at least two wavelengths of the R wavelengths.

In some embodiments, the OLT may determine port information of the first ONU corresponding to the first optical splitter according to at least two wavelengths of the R wavelengths and a preset correspondence. The corresponding relationship may be the corresponding relationship between the wavelength and the branch end of the optical splitter. The corresponding relationship includes a corresponding relationship between the at least two wavelengths and the first branch end of the first optical splitter, so that the OLT may determine that the first ONU corresponds to the first branch end of the first optical splitter according to the corresponding relationship between the at least two wavelengths and the first branch end of the first optical splitter.

For example, the first beam splitter is a 1:16 splitting ratio beam splitter, passing through λ₃～λ₈To distinguish the 16 branch ends of the first optical splitter, the OLT is configured with the correspondence between the wavelengths and the branch ends as shown in table 1, taking the first branch end as the branch end 7 as an example, and at least two wavelengths are λ₃And λ₄When the OLT determines that the R wavelengths include lambda₃And λ₄The OLT can be based on λ₃And λ₄It is determined that the first ONU corresponds to the branch end 7, i.e. the branch end 7 of the first splitter is directly or indirectly connected to the first ONU.

In the above technical solution, the branch end of the optical splitter transmits or transmits at least two different wavelengths, and the OLT determines a branch end through at least two different wavelengths, so that the branch ends of a large number of optical splitters can be defined through free combination of a small number of wavelengths, and the connection relationship between the ONU and the branch end of the optical splitter is accurately determined.

The port detection method shown in fig. 4 will be described in detail below with reference to specific examples.

Example 1

Take the ODN as a two-level beam splitter, and the encoding mode is a mixed mode of a first-level encoding and a second-level encoding. X-level coding is understood to mean that the branch ends of the optical splitter are used to reflect or transmit optical signals of X different wavelengths, respectively. For example, the branch ends of the optical splitter adopting the primary coding are respectively used for reflecting or transmitting an optical signal with one wavelength, and different branch ends are distinguished through different wavelengths; the branch ends of the optical splitter adopting the secondary coding are respectively used for reflecting or transmitting optical signals with two wavelengths, and different branch ends are distinguished through pairwise combination of different wavelengths; part of branch ends of the optical splitter adopting a primary coding and secondary coding mixed mode are used for reflecting or transmitting optical signals with one wavelength, and part of branch ends are used for reflecting or transmitting optical signals with two wavelengths. In this example, the beam splitter is used for example to reflect the monitor light.

As shown in fig. 5, the OLT and the ONU use an operating wavelength (e.g., 1260 to 1625nm) and a monitoring wavelength (e.g., 1625nm to 1645nm) for interactive communication, the optical fiber between the OLT and the WDM only passes the operating wavelength, the tunable laser only passes the monitoring wavelength with the WDM, and the operating wavelength and the monitoring wavelength are combined into one trunk optical fiber through a WDM combiner.

The first-stage light splitter has a light splitting ratio of 1: 4, the optical splitter improves the common optical splitter, namely, a grating is etched on the branch end of each optical splitter or the end face of each branch end is coated with a film, the formed grating or the formed reflecting film transmits the optical signal with the working wavelength, reflects the optical signal with the specific monitoring wavelength and transmits the optical signals with other monitoring wavelengths. For example, the 4 branch ends of the first-stage optical splitter are the branch ends 1-4 from top to bottom in sequence. The branch end 1 is only used for the wavelength λ₁Is reflected, the branch end 2 is only used for the wavelength lambda₂Is reflected, the branch end 3 is only used for the wavelengths λ 1 and λ₂Is reflected and the branch end 4 does not reflect optical signals of any wavelength. The optical splitter has the characteristic of only equal division of optical power for optical signals with working wavelengths, and has the characteristic of equal division of optical power for optical signals with monitoring wavelengths, and each branch end is used for reflecting optical signals with 0, 1 or 2 monitoring wavelengths. Thus, only 2 different waves are requiredThe length can be defined as 1-4 branch ends. The correspondence between the branch end of the first-order splitter and the wavelength can be as shown in table 3.

TABLE 3

Port(s)	1	2	3	4
					Encoding	λ₁	λ₂	λ₁λ₂

The second-stage light splitter has a light splitting ratio of 1:16, and the optical splitter only has the optical splitter characteristic for the optical signal with the working wavelength, and the optical signal with the monitoring wavelength not only has the optical power equal-dividing characteristic, but also each branch end is used for reflecting the optical signals with 0, 1 or 2 monitoring wavelengths. Taking a mixed mode of primary coding and secondary coding as an example, through a mixed mode of the primary coding and the secondary coding, 6+5+4+3+2+ 1-21 kinds of codes can be realized through 6 different wavelengths, and 16 branch ends can be completely distinguished. 6 different wavelengths are lambda₃～λ₈The correspondence between the branch end of the secondary optical splitter and the wavelength can be as shown in table 1 above.

Thus, in this exampleOnly 8 different wavelengths are required, where λ₁～λ₂For defining the branch end of a first-order splitter, lambda₃～λ₈For defining the branch end of the two-stage optical splitter.

The following describes the port detection process of the ONU and the splitter branch end.

Fig. 6 is an example of a port detection flow according to an embodiment of the present application. In fig. 6, the OLT determines the correspondence between the ONU and the splitter port. After each ONU comes online and completes the registration process, the port detection process of each ONU and the branch end of the optical splitter is started, and the specific process is described as follows, taking ONU8 as an example.

In 601, the ONU8 comes online and completes the registration flow.

At 602, the ONU8 notifies the OLT to start the port detection flow.

At 603, after receiving the notification information from the ONU8, the OLT sends a broadcast signal with a working wavelength to notify all ONUs that the receiving wavelength is λ₁The reception time of the optical signal of (1) is x seconds(s).

At 604, the OLT notifies a management system (e.g., NCE) that the transmission wavelength is λ₁The management system drives the tunable laser to transmit light with a wavelength of lambda₁The optical signal of (1).

At 605, ONU8 prepares to receive at wavelength λ₁The reception time length of the optical signal of (1) is xs.

At 606, the management system determines λ needs to be sent based on the wavelength information input during pre-network-setup ODN planning₁～λ₈8 optical signals with different wavelengths are issued to the tunable laser to drive the tunable laser to transmit light with the wavelength of lambda₁The optical signal of (1).

Optionally, the wavelength is λ₁May carry encoded information to distinguish between noisy optical signals.

In 607, the ONU8 receives the wavelength λ during the reception time (e.g., 1s)₁ONU8 stores the optical signal with wavelength λ₁The value of the optical power of the optical signal.

Because the ONU8 is indirectly connected with the branch end 1 of the first-level optical splitterThen, the wavelength is λ₁Is reflected, and the optical power of the optical signal received by the ONU8 has a small value or 0.

At 608, OLT sends a query message to ONU1, querying ONU8 for stored wavelength λ₁The optical power of the optical signal.

In 609, the ONU8 sends feedback information to the OLT, and the wavelength received by the feedback ONU8 is λ₁The optical power of the optical signal. Optionally, the feedback information comprises λ₁Optical power of the optical signal, lambda₁And the identity of the ONU 8.

At 610, after receiving the feedback information, the OLT stores the feedback information, λ₁The wavelength sweep is complete.

Step 603 and 610 are repeatedly executed until the OLT completes the lambda₁～λ₈And scanning to obtain the corresponding optical power value and the ONU identification.

In some embodiments, the OLT may also send an inquiry message to the ONU8 after all the wavelengths are scanned, and inquire the optical power of the optical signal with all or part of the wavelengths received by the ONU 8; the ONU8 feeds back the optical power of the received optical signal of all or part of the wavelength through feedback information.

In 611, after all the wavelength scans are completed, the OLT analyzes that the ONU8 cannot receive the wavelength λ₁、λ₅And λ₆May receive optical signals at other monitoring wavelengths.

Optionally, the OLT may generate a netlist of the optical power value and the ONU identifier according to the obtained value of the optical power of each wavelength and the ONU identifier. For example, the netlist of the optical power values and the ONU identifications can be as shown in table 4. Where N indicates no reception and Y indicates reception.

TABLE 4

λ₁

λ₂

λ₃

λ₄

λ₅

λ₆

λ₇

λ₈

ONU1

ONU2

ONU3

ONU4

…

ONU31

ONU32

At 612, the OLT retrieves the correspondence table (tables 1 and 3) of the branch ends of the preconfigured splitters and the wavelengths, and knows λ₁Corresponding to branch end 1, lambda of first-order splitter₅λ₆Corresponding to the branch end 8 of the second-level optical splitter, so that the corresponding relation between the ONU8 and the branch ends of the optical splitters in each level is automatically established.

The other ONUs are similar to ONU8 and will not be described one by one here.

Example 2

The ODN is used as the first-level light splitting, the coding mode is a mixed mode of the first-level coding and the second-level coding, and the light splitter is used for monitoring light transmission as an example.

As shown in fig. 7, the OLT and the ONU use an operating wavelength (e.g., 1260 to 1625nm) and a monitoring wavelength (e.g., 1625nm to 1645nm) for interactive communication, the optical fiber between the OLT and the WDM only passes the operating wavelength, the tunable laser only passes the monitoring wavelength with the WDM, and the operating wavelength and the monitoring wavelength are combined into one trunk optical fiber by the WDM combiner.

The first-stage light splitter has a light splitting ratio of 1:32 modified from conventional splitters by etching a grating or pair of branches at the branch end of each splitterThe end face of the end is coated with a film, and the formed grating or reflecting film transmits the optical signal with the working wavelength, transmits the optical signal with the specific monitoring wavelength and reflects the optical signal with other monitoring wavelengths. The optical splitter has the characteristic of only equal optical power for the optical signal with the working wavelength, and has the characteristic of equal optical power for the optical signal with the monitoring wavelength, and each branch end is used for reflecting the optical signal with the partial monitoring wavelength. Taking a mixed mode of primary coding and secondary coding as an example, through a mixed mode of the primary coding and the secondary coding, 8+7+6+5+4+3+2+1 can be realized as 36 kinds of codes through 8 different wavelengths, and 32 branch ends can be completely distinguished. 8 different wavelengths are lambda₁～λ₈The 32 branch ends of the first-stage optical splitter are branch ends 1-32 from top to bottom, and the corresponding relationship between the branch ends of the first-stage optical splitter and the wavelength can be as shown in table 2 above. The correspondence between the branch end and the wavelength shown in table 2 may be a correspondence between the branch end and the wavelength for reflection at the branch end, or a correspondence between the branch end and the wavelength for transmission at the branch end.

Thus, in this example, only 8 different wavelengths are required.

The port detection procedure in this example is similar to that in example 1, and reference may be made to the description related to 601-612.

Taking ONU9 as an example, the difference is that after all the wavelengths are scanned, the OLT analyzes and knows that ONU9 receives only the wavelength λ₁And λ₂The optical signal of (2), the optical signal of other monitoring wavelength is not received, or the ONU9 receives the optical signal of wavelength lambda₃-λ₈Optical signal of wavelength λ not received₁And λ₂The optical signal of (1). The OLT retrieves a table (Table 2) of correspondence between the branch end of the optical splitter and the wavelength, which has been preliminarily arranged, and knows λ₁λ₂Corresponding to the branch end 9 of the first-stage optical splitter, so that the corresponding relation between the ONU9 and the branch end of each-stage optical splitter is automatically established. The other ONUs are similar to ONU9 and will not be described one by one here.

Optionally, the OLT may generate a netlist of the optical power value and the ONU identifier according to the obtained value of the optical power of each wavelength and the ONU identifier. For example, the netlist of the optical power values and the ONU identifications can be shown in table 5. Where N indicates no reception and Y indicates reception.

TABLE 5

λ₁

λ₂

λ₃

λ₄

λ₅

λ₆

λ₇

λ₈

ONU1

ONU2

ONU3

ONU4

ONU9

…

ONU31

ONU32

In the port detection methods shown in fig. 4 to 7, port detection is performed by the OLT, and a method of performing port detection by the ONU is described below.

Fig. 8 is a schematic flow chart of a port detection method according to another embodiment of the present application. The method shown in fig. 8 is applicable to a PON system, and an ODN of the PON system includes a first branch end of a first optical splitter of at least one optical splitter for reflecting or transmitting optical signals of at least two different wavelengths.

At 810, the OLT sends optical signals of M wavelengths to at least one ONU, the M wavelengths being different from each other.

At 820, the first ONU determines R wavelengths according to values of optical powers of the optical signals with the M wavelengths, where R is an integer greater than or equal to 2.

In 830, the first ONU determines port information of the first ONU corresponding to the first optical splitter according to at least two wavelengths of the R wavelengths.

In 840, the first ONU sends feedback information to the OLT, the feedback information indicating that the first ONU corresponds to port information of the first optical splitter.

In 850, the OLT determines port information of the first ONU corresponding to the first splitter according to the received feedback information.

The port detection performed by the ONU is similar to the port detection performed by the OLT, and the difference is that the ONU determines port information of the first ONU corresponding to the first optical splitter according to at least two wavelengths of the R wavelengths, and feeds back the port information to the OLT through feedback information, and the OLT does not need to analyze optical power of optical signals of the wavelengths received by the ONU. Specifically, step 810 is similar to step 410, and reference may be made to the description related to step 410; the way for determining R wavelengths by the first ONU is similar to step 450, and reference may be made to the related description of step 450; step 840 is similar to step 440 and reference may be made to the description relating to step 440.

The port detection method shown in fig. 8 will be described in detail below with reference to specific examples.

Example 3

Also taking the PON system shown in fig. 5 as an example, the specific structure of the ODN may refer to the description related to fig. 5, and is not described herein again.

Fig. 9 is another example of a port detection flow according to an embodiment of the present application. In fig. 9, the ONU determines the correspondence between the ONU and the splitter port. After each ONU comes online and completes the registration process, the port detection process of each ONU and the branch end of the optical splitter is started, and the specific process is described as follows, taking ONU8 as an example.

In 901, the ONU8 comes online and completes the registration flow.

At 902, the ONU8 notifies the OLT to start the port detection flow.

In 903, after receiving the notification information of the ONU8, the OLT transmits a broadcast signal of an operating wavelength to notify all ONUs that the receiving wavelength is λ₁The reception time of the optical signal of (2) is xs.

At 904, the OLT notifies a management system (e.g., NCE) that the transmit wavelength is λ₁The management system drives the tunable laser to transmit light with a wavelength of lambda₁The optical signal of (1).

In 905, ONU8 prepares to receive at wavelength λ₁The reception time length of the optical signal of (1) is xs.

At 906, the management system determines λ needs to be sent based on the wavelength information input during pre-network-setup ODN planning₁～λ₈8 optical signals with different wavelengths are sent to the tunable laser to driveThe transmitting wavelength of the dynamically adjustable laser is lambda₁The optical signal of (1).

Optionally, the wavelength is λ₁May carry encoded information to distinguish between noisy optical signals.

In 907, the ONU8 receives the signal with wavelength λ during the reception time (e.g. 1s)₁ONU8 stores the optical signal with wavelength λ₁The value of the optical power of the optical signal. Since the ONU8 is indirectly connected to the branch end 1 of the first-order splitter, the wavelength is λ₁Is reflected, and the optical power of the optical signal received by the ONU8 has a small value or 0.

Step 903-₁～λ₈And the ONU8 obtains the corresponding optical power value and ONU identification.

At 908, after the optical signals with all wavelengths are received, the ONU8 analyzes that the ONU8 cannot receive the optical signal with the wavelength λ₁、λ₅And λ₆May receive optical signals at other monitoring wavelengths.

In 909, the ONU8 retrieves a correspondence table (tables 1 and 3) between the branch end of the preconfigured splitter and the wavelength, and finds λ₁Corresponding to branch end 1, lambda of first-order splitter₅λ₆Corresponding to the branch end 8 of the second-stage optical splitter, thereby determining the corresponding relation between the ONU8 and the branch end of each stage of optical splitter.

At 910, ONU8 transmits feedback information to the OLT, and feeds back to the OLT the correspondence between ONU8 and the branch end of each stage of the optical splitter specified by ONU 8.

At 911, the OLT determines OUU8 the correspondence with the branch ends of the optical splitters at each stage based on the received feedback information.

The other ONUs are similar to ONU8 and will not be described one by one here.

Example 4

Also taking the PON system shown in fig. 7 as an example, the specific structure of the ODN may refer to the description related to fig. 7, and is not described herein again. The port detection procedure of this example is similar to that of example 3, and reference may be made to the description of 901-911.

Take ONU9 as an example, differentAfter all the wavelength scanning is finished, the ONU9 analyzes and determines that the ONU9 only receives the wavelength lambda₁And λ₂The optical signal of (2), the optical signal of other monitoring wavelength is not received, or the ONU9 receives the optical signal of wavelength lambda₃-λ₈Optical signal of wavelength λ not received₁And λ₂The optical signal of (1). The ONU9 retrieves a correspondence table (table 2) of the wavelength and the branch end of the preconfigured splitter, and finds λ₁λ₂Corresponding to the branch end 9 of the first-stage optical splitter, the corresponding relation between the ONU9 and the branch end of each-stage optical splitter is determined, and the determined correspondence is sent to the OLT through feedback information. The other ONUs are similar to ONU9 and will not be described one by one here.

In the application, the branch end of the optical splitter transmits or transmits at least two different wavelengths, and the ONU determines one branch end through at least two different wavelengths, so that the branch ends of a large number of optical splitters can be defined through free combination of a small number of wavelengths, and the connection relationship between the ONU and the branch end of the optical splitter is accurately determined.

It should be noted that, in the above embodiment, the optical signals with M wavelengths, the query message, and the feedback information may be carried by a PLOAM message, an OMCI message, or a data channel.

It should be noted that the above embodiments may be implemented individually or may be implemented in combination as appropriate.

It is to be understood that, in order to implement the functions of the above-described embodiments, the communication apparatus includes a corresponding hardware structure and/or software module that performs each function. Those of skill in the art will readily appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software driven hardware depends on the particular application scenario and design constraints imposed on the solution.

Fig. 10 and 11 are schematic structural diagrams of a port detection device according to an embodiment of the present application.

The devices can be used for realizing the functions of the OLT or the ONU in the above method embodiments, and therefore, the beneficial effects of the above method embodiments can also be realized. In the embodiment of the present application, the communication device may be an OLT or an ONU, and may also be a module (e.g., a chip) applied to the OLT or the ONU.

As shown in fig. 10, the port detection apparatus 1000 includes a processing unit 1010 and a transceiver unit 1020. The port detection apparatus 1000 is used to implement the functions of the OLT or the ONU in the above method embodiments.

When the port detection apparatus 1000 is used to implement the function of the OLT in the embodiment of the method shown in fig. 4:

the transceiver unit 1020 is configured to send optical signals with M wavelengths to at least one ONU, where the M wavelengths are different from each other, and M is an integer greater than 1; receiving at least one feedback message sent by a first ONU, where the at least one feedback message is used to indicate that the first ONU receives the value of the optical power of the optical signal with the M wavelengths, and the first ONU is any one of the at least one ONU.

The processing unit 1010 is configured to determine, according to the magnitude of the value of the optical power of the optical signal with the M wavelengths, R wavelengths corresponding to the first ONU, where R is an integer greater than or equal to 2; determining port information of a first optical splitter corresponding to the first ONU according to at least two wavelengths of the R wavelengths, where a first branch end of the first optical splitter corresponds to the at least two wavelengths.

When the port detection apparatus 1000 is used to implement the functions of the ONU in the embodiment of the method shown in fig. 4:

the transceiver unit 1020 is configured to receive optical signals with M wavelengths sent by the OLT, where the M wavelengths are different from each other, and M is an integer greater than 1; and sending at least one piece of feedback information to the OLT, wherein the at least one piece of feedback information is used for indicating the value of the optical power of the optical signal with the M wavelengths received by the first ONU.

Optionally, the processing unit 1010 is configured to determine the R wavelengths according to values of optical powers of optical signals of M wavelengths received by the ONU.

When the port detection apparatus 1000 is used to implement the function of the OLT in the embodiment of the method shown in fig. 8:

the transceiver unit 1020 is configured to send optical signals with M wavelengths to at least one ONU, where the M wavelengths are different from each other, and M is an integer greater than 1; receiving feedback information sent by a first ONU, wherein the feedback information is used for indicating port information of the first ONU corresponding to the first optical splitter.

The processing unit 1010 is configured to determine, according to the feedback information, port information of the first ONU corresponding to the first optical splitter.

When the port detection apparatus 1000 is used to implement the functions of the ONU in the embodiment of the method shown in fig. 8:

the transceiver unit 1020 is configured to receive optical signals with M wavelengths sent by the OLT, where the M wavelengths are different from each other, and M is an integer greater than 1;

the processing unit 1010 is configured to determine, according to the magnitude of the value of the optical power of the optical signal with the M wavelengths, R wavelengths corresponding to the ONU, where R is an integer greater than or equal to 2; determining port information of the first optical splitter corresponding to the ONU according to at least two wavelengths of the R wavelengths, where a first branch end of the first optical splitter corresponds to the at least two wavelengths;

the transceiver unit 1020 is further configured to send feedback information to the OLT, where the feedback information is used to indicate the port information.

More detailed descriptions about the processing unit 1010 and the transceiver unit 1020 can be directly obtained by referring to the related descriptions in the method embodiments, which are not repeated herein.

As shown in fig. 11, the port detection apparatus 1100 includes a processor 1110 and an interface circuit 1120. The processor 1110 and the interface circuit 1120 are coupled to each other. It is understood that the interface circuit 1120 may be a transceiver or an input-output interface. Optionally, the port detection apparatus 1100 may further include a memory 1130 for storing instructions executed by the processor 1110 or storing input data required by the processor 1110 to execute the instructions or storing data generated by the processor 1110 after executing the instructions.

When the port detection apparatus 1100 is used to implement the method shown in fig. 4 or fig. 8, the processor 1110 is configured to perform the functions of the processing unit 1010, and the interface circuit 1120 is configured to perform the functions of the transceiver unit 1020.

When the port detection apparatus 1100 is a chip applied to the OLT, the chip implements the function of the OLT in the above method embodiment. The chip receives information from other modules in the OLT, and the information is sent to the OLT by other equipment; alternatively, the chip sends information to other modules in the OLT, and the information is sent by the OLT to other devices.

When the port detection device 1100 is a chip applied to an ONU, the chip implements the function of the ONU in the above method embodiment. The chip receives information from other modules in the ONU, and the information is sent to the terminal equipment ONU by other equipment; or the chip sends information to other modules in the ONU, and the information is sent by the ONU to other equipment.

It is understood that the Processor in the embodiments of the present Application may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The general purpose processor may be a microprocessor, but may be any conventional processor.

The method steps in the embodiments of the present application may be implemented by hardware, or may be implemented by software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read-Only Memory (ROM), Programmable ROM (PROM), Erasable PROM (EPROM), Electrically EPROM (EEPROM), registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may be located in the OLT or the ONU. Of course, the processor and the storage medium may reside as discrete components in the OLT or the ONU.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer program or instructions may be stored in or transmitted over a computer-readable storage medium. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server that integrates one or more available media. The usable medium may be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; or an optical medium, such as a DVD; it may also be a semiconductor medium, such as a Solid State Disk (SSD).

In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the text of the present application, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship; in the formula of the present application, the character "/" indicates that the preceding and following related objects are in a relationship of "division".

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

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