WO2021098330A1

WO2021098330A1 - Method for identifying connection port of optical network unit, related apparatuses, and system

Info

Publication number: WO2021098330A1
Application number: PCT/CN2020/112076
Authority: WO
Inventors: 杨素林
Original assignee: 华为技术有限公司
Priority date: 2019-11-19
Filing date: 2020-08-28
Publication date: 2021-05-27
Also published as: CN110996193B; CN110996193A

Abstract

Disclosed are a method for identifying a connection port of an ONU, an optical splitter supporting port identification, related devices such as an ONU and an OLT, a PON, and a communication system. When the ONU connected to a certain port of the optical splitter sends an uplink test optical signal, the uplink test optical signal is reflected by a reflector arranged at the port connected to the ONU to form an echo optical signal. There is a correlation between the intensity of the echo optical signal and the reflectivity of the reflector, and there is also a correlation between the reflectivity of the reflector and information of the port where the reflector is located, and therefore, there is a correlation between the intensity of the echo optical signal and the information of the port connected to the ONU. Thereby, the information of the port of the optical splitter connected to the ONU is obtained. Furthermore, a topological structure of the PON can be obtained for facilitating rapid fault positioning.

Description

Method, related device and system for identifying connection port of optical network unit

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 201911135661.4, and the invention title is "Methods, Related Devices and Systems for Identifying Optical Network Unit Connection Ports" on November 19, 2019. All of them The content is incorporated in this application by reference.

Technical field

This application relates to optical communication technology, and in particular, to a method, related devices, and systems for identifying connection ports of optical network unit (ONU) equipment.

Background technique

Passive Optical Network (PON) system includes optical line terminal (OLT), optical distribution network (ODN), and multiple ONUs or optical network terminals (Optical Network Terminals) located on the user side. Network Termination, ONT).

The upstream and downstream optical signals of the PON system can be transmitted in the same optical fiber. The optical signal in the downstream direction (from the OLT to the ONU) works in a time division multiplexing (TDM) mode. The data sent by the OLT will be broadcast to all branch fibers and reach all ONUs; the optical signal in the upstream direction (ONU to OLT) Signals work in Time Division Multiple Access (TDMA) mode, and ONUs only transmit in authorized time slots. Of course, the upstream and downstream optical signals can also be transmitted in different optical fibers.

ODN can transmit optical signals between the OLT and multiple ONUs. However, the ODN topology is relatively complicated, and the connection relationship between the ONU and the optical splitter in the ODN is also frequently changed, which brings difficulties to the operation and maintenance personnel to locate and eliminate the fault.

Summary of the invention

The embodiments of the present application provide a method, device, and system for identifying an ONU connection port of an optical network unit.

In the first aspect, an embodiment of the present application provides a method for identifying an ONU connection port of an optical network unit, including: the ONU sends a first upstream optical signal (upstream test optical signal), and receives the first upstream optical signal in an optical fiber network The generated echo optical signal, the optical fiber network may specifically be an ODN; the ONU obtains the intensity information of the echo optical signal, and determines the first optical splitter connected to the ONU according to the intensity information of the echo optical signal. The information of a port, wherein there is a corresponding relationship between the intensity information of the echo optical signal and the information of the first port. In the embodiment of the present application, the ONU receives the echo optical signal generated by the first upstream optical signal in the optical fiber network, and determines which port of the final optical splitter the ONU is connected to according to the intensity information of the echo optical signal, that is, the first port Information. If the ONU fails to connect to the network, the network signal is poor, etc., the operation and maintenance personnel can quickly locate the port connected to the ONU or the optical fiber link corresponding to the port based on the information of the first port of the ONU, which is convenient for fast Fault location and fault elimination.

In a possible design, the echo optical signal includes the first part of the optical signal reflected by the reflector provided at the first port in the first uplink optical signal, and the intensity information of the echo optical signal is compared with the first optical signal. The correspondence between the information of one port is based on the correspondence between the reflectivity of the reflector set at the first port and the information of the first port. The intensity of the first partial optical signal has a corresponding relationship with the reflectance of the reflector provided at the first port, so that the intensity information of the echo optical signal has a corresponding relationship with the reflectance of the reflector provided at the first port . The greater the reflectivity of the reflector provided at the first port, the greater the intensity of the echo optical signal. And because there is a corresponding relationship between the reflectance of the reflector provided at the first port and the information of the first port, the difference between the intensity information of the echo optical signal and the information of the first port can be obtained. Correspondence. By setting a reflector at the port of the last-stage optical splitter, and the reflectance of the reflector has a corresponding relationship with the information of the port where the reflector is located, the intensity information of the echo optical signal is also different from the information of the first port. There is a corresponding relationship, so that the ONU's determination result of the first port information is more accurate, and the influence of noise generated by other reflection points (such as mechanical connections) on the determination result is reduced.

In a possible design, the ONU sends a second upstream optical signal (upstream service optical signal) to the optical line terminal OLT, and the second upstream optical signal is used to request the OLT to authorize the ONU to send the first Uplink optical signal. The ONU requests the OLT to authorize the connection port test to ensure that the test can be performed normally and does not affect the transmission of service data.

In a possible design, the ONU receives the first downstream optical signal sent by the OLT, and the first downstream optical signal carries instruction information instructing the ONU to send the first upstream optical signal, and/or The ONU sends time information of the first upstream optical signal. The ONU sends the uplink test signal in the allocated time slot according to the instructions of the OLT, which can ensure the normal progress of the connection port test and improve the efficiency and accuracy of the test.

In a possible design, the ONU determines the connection relationship between the ONU and the optical fiber network according to the information of the first port. The ONU can further determine the connection relationship between the ONU and the ODN according to the information of the first port and the topology of the ODN stored in itself; or the ONU can determine the second optical splitter connected to the ONU according to the intensity information of the echo optical signal. The information of the port is further determined according to the information of the first port and the information of the second port to further determine the connection relationship between the ONU and the ODN. Such a method facilitates accurate and efficient acquisition of the PON topology, thereby facilitating fault location and fault elimination.

In a possible design, the ONU sends a third upstream optical signal (upstream service optical signal) to the OLT, and the third upstream optical signal carries the information of the first port or the connection between the ONU and the optical fiber network. Connection relationship. In this way, the OLT can obtain the connection relationship of the ONU, thereby facilitating the acquisition of the PON topology.

In a possible design, the wavelength of the first upstream optical signal is the same as the wavelength of the second upstream optical signal or the third upstream optical signal. That is, the uplink test signal and the uplink service signal have the same wavelength, and the transmitter that sends the uplink service signal in the ONU can also be used to send the uplink test signal.

In a possible design, the wavelengths of the first upstream optical signal and the second upstream optical signal or the third upstream optical signal are different. The uplink test signal and the uplink service signal have different wavelengths, and the ONU includes an uplink test optical signal transmitter and an uplink service optical signal transmitter. In this way, the service data transmission and the connection port test will not affect each other, even if the two are carried out at the same time.

In a possible design, the intensity information of the echo optical signal includes the height of the first reflection peak in the reflection curve of the echo optical signal, and the first reflection peak is based on the first reflection peak in the first upstream optical signal. The first part of the optical signal reflected by the reflector set at one port is formed. The height of the first reflection peak indicates the intensity of the first part of the optical signal; the ONU determines the first part of the optical signal according to the intensity information of the echo optical signal. The information of the port specifically includes: the ONU determines the information of the first port according to the height of the first reflection peak, wherein the correspondence between the height of the first reflection peak and the information of the first port The relationship is based on the corresponding relationship between the reflectivity of the reflector provided at the first port and the information of the first port. The ONU may store the corresponding relationship between the height of the first reflection peak and the information of the first port, and the ONU can then store the corresponding relationship between the height of the first reflection peak and the information of the first port. The correspondence between the information of the first port may determine the information of the first port.

In a possible design, the ONU determines the information of the first port according to the intensity information of the echo optical signal, and further includes: the ONU is connected to the last-stage optical splitter based on the distance of the first reflection peak The first reflection peak is determined by the distance difference of the corresponding attenuation event being less than the first distance threshold, wherein the distance of the first reflection peak indicates the distance between the ONU and the reflector provided at the first port . The first upstream optical signal passes through the final-stage optical splitter to form a corresponding attenuation event. The distance between the attenuation event and the first reflection peak caused by the reflector set at the port of the final-stage optical splitter is very close. Since the attenuation event is easier to distinguish on the reflection curve, the method for determining the first reflection peak is simple and accurate.

In a possible design, the intensity information of the echo optical signal further includes the height of a second reflection peak in the reflection curve of the echo optical signal, and the second reflection peak is based on the height of the second reflection peak in the first uplink optical signal. The second part of the optical signal reflected by the reflector at the second port is formed, the height of the second reflection peak indicates the intensity of the second part of the optical signal, and the distance of the second reflection peak indicates the ONU and the The distance between the reflectors provided at the second port, the distance of the second reflection peak is greater than the distance of the first reflection peak;

The ONU also determines the information of the second port connected to the last-stage optical splitter connected to the ONU according to the height of the second reflection peak, and the difference between the height of the second reflection peak and the information of the second port The corresponding relationship is based on the corresponding relationship between the reflectance of the reflector set at the second port and the information of the second port; the ONU is further based on the information of the first port and the information of the second port Determine the connection relationship between the ONU and the optical fiber network.

By setting a reflector at the port of the previous-stage optical splitter of the last-stage optical splitter, and the reflectivity of the reflector has a corresponding relationship with the information of the port of the previous-stage optical splitter where the reflector is located, the ONU The information of the second port corresponds to the height of the second reflection peak of the echo optical signal, so that it is convenient to determine which port of the previous-stage optical splitter the last-stage optical splitter connected to the ONU is connected to. Such a method facilitates accurate and efficient acquisition of the ODN topology and the PON topology.

In a second aspect, an embodiment of the present application provides a method for identifying an ONU connection port of an optical network unit, including: a device receiving intensity information of an echo optical signal sent by a first optical network unit ONU, where the echo optical signal is the first The echo optical signal generated in the optical fiber network by the first upstream optical signal sent by the ONU; the device determines the first optical splitter of the last-stage optical splitter connected to the first ONU according to the intensity information of the echo optical signal sent by the first ONU Port information. In the embodiment of the present application, the device determines which port of the last-stage optical splitter the first ONU is connected to according to the intensity information of the echo optical signal sent by the first ONU, that is, the information of the first port. If the first ONU has problems such as network connection failure, poor network signal, etc., the operation and maintenance personnel can quickly locate the port connected to the first ONU or the port corresponding to the first ONU based on the information of the first port of the first ONU. Optical fiber link facilitates rapid fault location and fault elimination.

In a possible design, there is a corresponding relationship between the intensity information of the echo optical signal sent by the first ONU and the information of the first port; The first part of the optical signal reflected by the reflector set at the first port, the corresponding relationship between the intensity information of the echo optical signal sent by the first ONU and the information of the first port is based on the set of the first port Correspondence between the reflectivity of the reflector and the information of the first port. By setting a reflector at the port of the last-stage optical splitter, and the reflectance of the reflector has a corresponding relationship with the information of the port where the reflector is located, the echo optical signal (including the first part of the optical signal reflected by the reflector) There is also a corresponding relationship between the intensity information of the first port and the information of the first port, so that the device determines the first port information of the first ONU more accurately, and reduces the occurrence of other reflection points (such as mechanical connections). The effect of noise on the determination result.

In a possible design, the device determines the connection relationship between the first ONU and the optical fiber network according to the information of the first port. The device may further determine the connection relationship between the first ONU and the ODN according to the information of the first port and the topological structure of the ODN stored in itself; or the device may further determine the connection relationship between the first ONU and the ODN according to the intensity information of the echo optical signal sent by the first ONU The information of the second port connected to the last-stage optical splitter connected to the first ONU is determined, and the connection relationship between the first ONU and the ODN is further determined according to the information of the first port and the information of the second port. Such a method facilitates accurate and efficient acquisition of the PON topology, thereby facilitating fault location and fault elimination.

In a possible design, the intensity information of the echo optical signal sent by the first ONU includes the height of the first reflection peak in the reflection curve of the echo optical signal, and the first reflection peak is based on the first upstream The optical signal is formed by the first part of the optical signal reflected by the reflector provided at the first port, and the height of the first reflection peak indicates the intensity of the first part of the optical signal;

The device determining the information of the first port according to the intensity information of the echo optical signal specifically includes: the device determining the information of the first port according to the height of the first reflection peak, wherein the first port There is a correspondence between the height of a reflection peak and the information of the first port, and the correspondence between the height of the first reflection peak and the information of the first port is based on the reflector set at the first port Correspondence between the reflectivity of and the information of the first port.

The device may store the corresponding relationship between the height of the first reflection peak and the information of the first port, and the device may then store the corresponding relationship between the height of the first reflection peak and the intensity information of the echo optical signal and the height of the first reflection peak. The correspondence relationship with the information of the first port may determine the information of the first port.

In a possible design, the device determines the information of the first port according to the intensity information of the echo optical signal, and further includes: the device is based on the distance between the first reflection peak and the last-stage optical splitter The distance between the corresponding attenuation events is less than a first distance threshold to determine the first reflection peak, wherein the distance of the first reflection peak indicates the distance between the first ONU and the reflector provided at the first port distance. The first upstream optical signal passes through the final-stage optical splitter to form a corresponding attenuation event. The distance between the attenuation event and the first reflection peak caused by the reflector set at the port of the final-stage optical splitter is very close. Since the attenuation event is easier to distinguish on the reflection curve, the method for determining the first reflection peak is simple and accurate.

In a possible design, the intensity information of the echo optical signal sent by the first ONU further includes the height of the second reflection peak in the reflection curve of the echo optical signal, and the second reflection peak is based on the first reflection peak. It is formed by the second part of the optical signal reflected by the reflector provided at the second port in the upstream optical signal, the height of the second reflection peak indicates the intensity of the second part of the optical signal, and the distance of the second reflection peak indicates The distance between the first ONU and the reflector provided at the second port, and the distance of the second reflection peak is greater than the distance of the first reflection peak;

The device further determines the information of the second port according to the height of the second reflection peak, where the second port is the port of the previous-stage optical splitter connected to the last-stage optical splitter connected to the first ONU , There is a correspondence between the height of the second reflection peak and the information of the second port, and the correspondence between the height of the second reflection peak and the information of the second port is based on the second port The corresponding relationship between the reflectance of the reflector and the information of the second port; the device determines the first ONU and the optical fiber according to the information of the first port and the information of the second port The connection of the network. Such a method facilitates accurate and efficient acquisition of the ODN topology and the PON topology.

In a possible design, the device also receives the intensity information of the echo optical signal sent by the second ONU. The second ONU is an ONU other than the first ONU in the optical network system; the device is based on The intensity information of the echo optical signal sent by the second ONU determines the third ONU that is connected to the same final-stage optical splitter as the first ONU; and the device is based on the intensity of the echo optical signal sent by the third ONU The information determines the information of the second port. Because the distance between the ONU and the reflector of the previous-stage optical splitter connected to the last-stage optical splitter is relatively long, the transmission distance of the upstream test optical signal and the echo optical signal is relatively long, so it is greatly affected by factors such as noise. The height of the reflection peak has a large error. The information of the second port is determined according to the intensity information of the echo optical signal of the third ONU connected to the same final optical splitter, which can reduce errors and make the determined information of the second port more accurate.

In a possible design, the device further determines a fourth ONU connected to the same final sub-splitter with the first ONU according to the intensity information of the echo optical signal sent by the second ONU, and the final sub-splitter The device is the last-stage sub-splitter in the last-stage optical splitter; the device determines the first-stage sub-splitter according to the intensity information of the echo optical signal sent by the first ONU and the intensity information of the echo optical signal sent by the fourth ONU Information about a port. The fourth ONU and the first ONU connected to the same final sub-splitter are regarded as a group of ONUs.

In a possible design, the device determining the information of the first port specifically includes: the device according to the intensity information of the echo optical signal sent by the first ONU and/or the echo sent by the fourth ONU The intensity information of the wave-light signal determines the identifier of the corresponding final sub-splitter connected to the first ONU, that is, the device determines which final sub-splitter the first ONU is connected to; the device further determines which sub-splitter is connected to the first ONU; The intensity information of the echo optical signal sent by the first ONU and the intensity information of the echo optical signal sent by the fourth ONU determine the information of the first port, for example, compare the sizes of the two. That is, the device further determines to which port of the final sub-splitter the first ONU is connected.

In a possible design, the device is an optical line terminal OLT, and the method further includes: the OLT sends a first downstream optical signal, and the first downstream optical signal carries an instruction to the first ONU to send The indication information of the first upstream optical signal, and/or the time information of the first ONU sending the first upstream optical signal. The ONU sends the uplink test signal in the allocated time slot according to the instructions of the OLT, which can ensure the normal progress of the connection port test and improve the efficiency and accuracy of the test.

In a possible design, the OLT sends a second downstream optical signal, and the second downstream optical signal carries instruction information that instructs the first ONU to obtain intensity information of the echo optical signal, and/or the first An ONU acquires time information of the intensity information of the echo optical signal.

In a possible design, the OLT sends a third downstream optical signal, and the third downstream optical signal carries instruction information that instructs the first ONU and the second ONU to obtain the intensity information of the echo optical signal, And/or time information for the first ONU and the second ONU to acquire the intensity information of the echo optical signal. The first ONU sends the uplink test signal, and all ONUs obtain the intensity information of the echo optical signal of the uplink test signal according to the instructions of the OLT, which can ensure the normal progress of the connection port test and improve the accuracy of the test.

In one possible design, the device is a network management server. The device receiving the intensity information of the echo optical signal sent by the first ONU specifically includes: the network management device receiving the intensity information of the echo optical signal obtained by the first ONU sent by the OLT.

In a third aspect, an embodiment of the present application provides an ONU of an optical network unit, which is characterized by comprising: an upstream optical signal transmitter, configured to send a first upstream optical signal; an echo optical signal receiver, configured to receive the first upstream optical signal The echo optical signal generated by the uplink optical signal in the optical fiber network; the processing module is used to obtain the intensity information of the echo optical signal, and determine the first optical splitter connected to the ONU according to the intensity information of the echo optical signal The information of a port, wherein there is a corresponding relationship between the intensity information of the echo optical signal and the information of the first port.

In a possible design, the echo optical signal includes the first part of the optical signal reflected by the reflector provided at the first port in the first uplink optical signal, and the intensity information of the echo optical signal is compared with the first optical signal. The correspondence between the information of one port is based on the correspondence between the reflectivity of the reflector set at the first port and the information of the first port.

In a possible design, the upstream optical signal transmitter is also used to send a second upstream optical signal to an optical line terminal OLT, and the second upstream optical signal is used to request the OLT to authorize the ONU to transmit the The first upstream optical signal.

In a possible design, the ONU further includes: a downstream optical signal receiver for receiving a first downstream optical signal sent by an optical line terminal OLT, and the first downstream optical signal carries an instruction to the ONU to send The indication information of the first upstream optical signal, and/or the time information of the ONU sending the first upstream optical signal.

In a possible design, the processing module is further configured to determine the connection relationship between the ONU and the optical fiber network according to the information of the first port.

In a possible design, the upstream optical signal transmitter is also used to send a third upstream optical signal to the OLT, and the third upstream optical signal carries the information of the first port or the ONU and the optical fiber The connection of the network.

In a possible design, the wavelengths of the first upstream optical signal, the second upstream optical signal, the third upstream optical signal, and the echo optical signal are the same.

In a possible design, the upstream optical signal transmitter includes a first upstream optical signal transmitter and a second upstream optical signal transmitter, and the first upstream optical signal transmitter is used to transmit the first upstream optical signal The second uplink optical signal transmitter is used to send the second uplink optical signal or the third uplink optical signal; the wavelengths of the first uplink optical signal and the echo optical signal are the same; the first The upstream optical signal has a different wavelength from the second upstream optical signal or the third upstream optical signal.

In a possible design, the intensity information of the echo optical signal includes the height of the first reflection peak in the reflection curve of the echo optical signal, and the first reflection peak is based on the first reflection peak in the first upstream optical signal. Formed by the first part of the optical signal reflected by a reflector provided at a port, and the height of the first reflection peak indicates the intensity of the first part of the optical signal;

The processing module is configured to determine the information of the first port according to the intensity information of the echo optical signal, and specifically includes: the processing module is configured to determine the first port according to the height of the first reflection peak , Wherein the correspondence between the height of the first reflection peak and the information of the first port is based on the relationship between the reflectivity of the reflector set at the first port and the information of the first port Correspondence.

In a possible design, the intensity information of the echo optical signal further includes the height of a second reflection peak in the reflection curve of the echo optical signal, and the second reflection peak is based on the height of the second reflection peak in the first uplink optical signal. The second part of the optical signal reflected by the reflector at the second port is formed, the height of the second reflection peak indicates the intensity of the second part of the optical signal, and the distance of the second reflection peak indicates the ONU and the The distance between the reflectors provided on the second port, the distance of the first reflection peak indicates the distance between the ONU and the reflector provided on the first port, and the distance of the second reflection peak is greater than the distance between the reflectors provided on the first port. The distance of the first reflection peak;

The processing module is further configured to determine information about the second port according to the height of the second reflection peak, where the second port is the previous-stage optical splitter connected to the last-stage optical splitter connected to the ONU The corresponding relationship between the height of the second reflection peak and the information of the second port is based on the corresponding relationship between the reflectivity of the reflector set at the second port and the information of the second port The processing module is further configured to determine the connection relationship between the ONU and the optical fiber network according to the information of the first port and the information of the second port.

Among them, the technical effects brought about by any of the solutions in the third aspect can be referred to the technical effects brought about by the different solutions in the first aspect, which will not be repeated here.

In a fourth aspect, an embodiment of the present application provides a device for identifying an ONU connection port of an optical network unit. The device includes a receiver for receiving intensity information of an echo optical signal sent by a first optical network unit ONU. The signal is the echo optical signal generated in the optical fiber network by the first upstream optical signal sent by the first ONU; the processing module is used to determine the first ONU connection according to the intensity information of the echo optical signal sent by the first ONU The information of the first port of the last-stage optical splitter.

In a possible design, there is a corresponding relationship between the intensity information of the echo optical signal sent by the first ONU and the information of the first port; The first part of the optical signal reflected by the reflector set at the first port, the corresponding relationship between the intensity information of the echo optical signal sent by the first ONU and the information of the first port is based on the set of the first port Correspondence between the reflectivity of the reflector and the information of the first port.

In a possible design, the processing module is further configured to determine the connection relationship between the first ONU and the optical fiber network according to the information of the first port.

The processing module is configured to determine the information of the first port according to the intensity information of the echo optical signal, and includes: the processing module is configured to determine the information of the first port according to the height of the first reflection peak Information, wherein there is a correspondence between the height of the first reflection peak and the information of the first port, and the correspondence between the height of the first reflection peak and the information of the first port is based on the Correspondence between the reflectivity of the reflector provided at the first port and the information of the first port.

In a possible design, the intensity information of the echo optical signal sent by the first ONU further includes the height of the second reflection peak in the reflection curve of the echo optical signal, and the second reflection peak is based on the first reflection peak. It is formed by the second part of the optical signal reflected by the reflector provided at the second port in the upstream optical signal, the height of the second reflection peak indicates the intensity of the second part of the optical signal, and the distance of the second reflection peak indicates The distance between the first ONU and the reflector provided at the second port, the distance of the first reflection peak indicates the distance between the first ONU and the reflector provided at the first port, so The distance of the second reflection peak is greater than the distance of the first reflection peak;

The processing module is further configured to determine the information of the second port according to the height of the second reflection peak. Wherein, the second port is the port of the previous-stage optical splitter connected to the last-stage optical splitter connected to the first ONU, and there is a correspondence between the height of the second reflection peak and the information of the second port , The correspondence between the height of the second reflection peak and the information of the second port is based on the correspondence between the reflectivity of the reflector set at the second port and the information of the second port; The processing module is further configured to determine the connection relationship between the first ONU and the optical fiber network according to the information of the first port and the information of the second port.

In a possible design, the receiver is further configured to receive intensity information of the echo optical signal sent by a second ONU, where the second ONU is an ONU other than the first ONU in the optical network system; The processing module is further configured to determine, according to the intensity information of the echo optical signal sent by the second ONU, a third ONU that is connected to the same final-stage optical splitter with the first ONU; the processing module is also configured to Determining the information of the second port according to the intensity information of the echo optical signal sent by the third ONU.

In a possible design, the processing module is further configured to determine, according to the intensity information of the echo optical signal sent by the second ONU, a fourth ONU connected to the same final sub-splitter as the first ONU, and The last-stage sub-splitter is the last-stage sub-splitter in the last-stage optical splitter; the processing module is also used for according to the intensity information of the echo optical signal sent by the first ONU and the echo sent by the fourth ONU The intensity information of the wave light signal determines the information of the first port.

In a possible design, the determining the information of the first port according to the intensity information of the echo optical signal sent by the first ONU and the intensity information of the echo optical signal sent by the fourth ONU specifically includes: The intensity information of the echo optical signal sent by the first ONU and/or the intensity information of the echo optical signal sent by the fourth ONU determines the identification of the corresponding final sub-splitter connected to the first ONU; The identification of the final sub-splitter connected to the ONU further determines the information of the first port according to the intensity information of the echo optical signal sent by the first ONU and the intensity information of the echo optical signal sent by the fourth ONU.

In a possible design, the device is an optical line terminal OLT, and the receiver is an upstream optical signal receiver. The OLT further includes: a downstream optical signal transmitter, configured to send a first downstream optical signal, the first downstream optical signal carrying instruction information instructing the first ONU to send the first upstream optical signal, and /Or time information of the first ONU sending the first upstream optical signal.

In a possible design, the downstream optical signal transmitter is further configured to send a second downstream optical signal, and the second downstream optical signal carries an instruction that instructs the first ONU to obtain intensity information of the echo optical signal Information, and/or time information for the first ONU to obtain the intensity information of the echo optical signal.

In a possible design, the downstream optical signal transmitter is also used to send a third downstream optical signal, and the third downstream optical signal carries an instruction to the first ONU and the second ONU to obtain the echo optical signal. Indication information of signal strength information, and/or time information for the first ONU and the second ONU to obtain the strength information of the echo optical signal.

In one possible design, the device is a network management server.

Among them, the technical effects brought about by any of the solutions in the fourth aspect can be referred to the technical effects brought about by the different solutions in the second aspect, which will not be repeated here.

In a fifth aspect, an embodiment of the present application provides an optical splitter that supports port identification. The optical splitter that supports port identification includes 1 or 2 first-side ports and N second-side ports; the first-side port It is used to connect the first-level optical splitter or OLT, and the second-side port is used to connect the subsequent-level optical splitter or ONU; among the N second-side ports, at least (N-1) second-side ports are provided with For the first reflector, the port information of the second side port has a corresponding relationship with the reflectivity of the first reflector of the second side port, where N is an integer greater than 1.

When the upward optical signal is transmitted to the first reflector, part of the optical signal is reflected, thereby forming an echo optical signal of the upward optical signal. The intensity information of the echo optical signal has a corresponding relationship with the reflectivity of the first reflector. Furthermore, according to the corresponding relationship between the reflectivity of the first reflector and the port information of the second side port where the first reflector is located, it can be determined that the intensity information of the echo optical signal is related to the first reflector where the first reflector is located. Correspondence of the port information of the ports on the two sides.

In a sixth aspect, an embodiment of the present application provides an optical splitter that supports port identification. The optical splitter that supports port identification includes 1 or 2 first-side ports and N second-side ports; the first-side port Used to connect to a previous-stage optical splitter or OLT, the second side port is used to connect to a later-stage optical splitter or ONU, and N is an integer greater than 1;

The optical splitter that supports port identification includes P final sub-splitters, the final sub-splitter is the last sub-splitter in the optical splitters that support port identification, and the final sub-splitter includes 1 One or two third-side ports and Q fourth-side ports, where the third-side port is used to connect the previous-stage sub-splitter or hang in the air, and the fourth-side port of the last-stage sub-splitter is the For the second side port of the optical splitter that supports port identification, P is a positive integer, and Q is an integer greater than 1;

Each of the last-stage sub-splitters has one of the third-side ports provided with a second reflector, and each of the last-stage sub-splitters has at least Q-1 fourth-side ports provided with a third reflector. Reflector; wherein, the identifier of the final sub-splitter and the reflectivity of the second reflector of the final sub-splitter have a corresponding relationship, or the identifier of the final sub-splitter and the final sub-splitter The reflectivity of the third reflector of the beam splitter has a corresponding relationship.

In a possible design, one third-side port of the last-stage sub-splitter is connected to the previous-stage sub-splitter, and the other third-side port of the last-stage sub-splitter is suspended; each One of the third side ports of the final sub-splitter is provided with a second reflector, which specifically includes: the suspended third side port of each of the final sub-splitters is provided with the second reflector Device.

In a seventh aspect, an embodiment of the present application provides a passive optical network system, including an optical line terminal OLT and an optical network unit ONU. The ONU is used to implement the method of any of the solutions in the first aspect; the OLT is used for Receiving the information of the first port of the last-stage optical splitter to which the ONU is connected or the connection relationship between the ONU and the optical fiber network reported by the ONU.

Among them, the technical effects brought about by any of the solutions in the seventh aspect can be referred to the technical effects brought about by the different solutions in the first aspect, which will not be repeated here.

In an eighth aspect, an embodiment of the present application provides a passive optical network system, including an optical line terminal OLT and a first optical network unit ONU, and the OLT is used to execute the method executed by the OLT in any of the solutions of the second aspect ; The first ONU is used to send a first upstream optical signal.

In a possible design, the passive optical network system further includes a second ONU, and the second ONU is an ONU other than the first ONU in the passive optical network system, and the second ONU is used for Reporting the intensity information of the echo optical signal generated by the first optical signal in the optical fiber network to the OLT.

Among them, the technical effects brought about by any one of the solutions in the eighth aspect can be referred to the technical effects brought about by different solutions in the second aspect, which will not be repeated here.

In a ninth aspect, an embodiment of the present application provides a passive optical network system, including an optical line terminal OLT, an optical distribution network ODN, and a plurality of optical network unit ONUs, the OLT is connected to the plurality of ONUs through the ODN At least one of the multiple ONUs is the ONU described in any one of the third aspect.

In a possible design, the ODN includes a final-stage optical splitter, the final-stage optical splitter includes a first side port and a second side port, wherein the first side port is used to connect the previous-stage optical splitter or In the OLT, the second side port is used to connect the multiple ONUs; the second side port to which the at least one ONU is connected is provided with a first reflector, and the port information of the second side port and the first The reflectivity of the first reflector of the two-side ports has a corresponding relationship; and the second-side port to which the at least one ONU is connected is the first port of the at least one ONU.

In a possible design, the ODN includes a final-stage optical splitter, the final-stage optical splitter includes a first side port and a second side port, wherein the first side port is used to connect the previous-stage optical splitter or In the OLT, the second side port is used to connect the multiple ONUs; the last-stage optical splitter includes P last-stage sub-splitters, and the last-stage sub-splitter is the last of the last-stage optical splitters. The first-stage sub-splitter, the last-stage sub-splitter includes one or two third-side ports, and Q fourth-side ports, the third-side ports are connected to the previous-stage sub-splitter or suspended, the The fourth side port of the final sub-splitter is the second side port of the final sub-splitter, P is a positive integer, and Q is an integer greater than 1; one of the final sub-splitters The third side port is provided with a second reflector, and at least Q-1 fourth side ports in each of the last-stage sub-splitters are provided with a third reflector; wherein, the identification and the location of the last-stage sub-splitter The reflectivity of the second reflector of the last-stage sub-splitter has a corresponding relationship, or the identifier of the last-stage sub-splitter has a corresponding relationship with the reflectivity of the third reflector of the last-stage sub-splitter.

Among them, the technical effects brought about by any of the solutions in the ninth aspect can be referred to the technical effects brought about by the different solutions in the first aspect, which will not be repeated here.

In a tenth aspect, an embodiment of the present application provides a passive optical network system, including an optical line terminal OLT, an optical distribution network ODN, and a plurality of optical network unit ONUs, the OLT is connected to the plurality of ONUs through the ODN , The OLT is used to execute the method executed by the OLT in any of the solutions of the second aspect.

In a possible design, the ODN includes a final-stage optical splitter, the final-stage optical splitter includes a first side port and a second side port, wherein the first side port is used to connect the previous-stage optical splitter or In the OLT, the second side port is used to connect the ONU; each second side port is provided with a first reflector, the port information of the second side port and the second side port The reflectivity of a reflector has a corresponding relationship; and the second side port to which the ONU is connected is the first port of the ONU.

In a possible design, the ODN includes a final-stage optical splitter, the final-stage optical splitter includes a first side port and a second side port, wherein the first side port is used to connect the previous-stage optical splitter or In the OLT, the second side port is used to connect to the ONU; the last-stage optical splitter includes P last-stage sub-splitters, and the last-stage sub-splitter is the last stage of the last-stage optical splitter A sub-splitter, the last-stage sub-splitter includes one or two third-side ports, and Q fourth-side ports, the third-side ports are connected to the previous-stage sub-splitter or are suspended, the last-stage The fourth side port of the sub-splitter is the second side port of the last-stage optical splitter, P is a positive integer, and Q is an integer greater than 1. In each of the last-stage sub-splitters, one of the third The side port is provided with a second reflector, and at least Q-1 of the fourth side ports in each of the final sub-splitters are provided with a third reflector; wherein the identifier of the final sub-splitter and the end of the sub-splitter There is a corresponding relationship between the reflectivity of the second reflector of the first-stage sub-spectroscope, or the identifier of the last-stage sub-spectroscope and the reflectivity of the third reflector of the last-stage sub-spectroscope have a corresponding relationship.

Among them, the technical effects brought about by any one of the solutions in the tenth aspect can be referred to the technical effects brought about by the different solutions in the first aspect, which will not be repeated here.

In an eleventh aspect, an embodiment of the present application provides a communication system, including a network management device and a passive optical network system, where the passive optical network system is used to send the first ONU and/or the first ONU to the network management device. 2. The intensity information of the echo optical signal generated in the optical fiber network by the first upstream optical signal obtained by the ONU, the first ONU is the ONU that sends the first upstream optical signal, and the second ONU is the passive optical signal Other ONUs in the network system except the first ONU; the network management device is used to execute any method of the second aspect.

Among them, the technical effects brought about by any of the solutions in the eleventh aspect can be referred to the technical effects brought about by the different solutions in the second aspect, which will not be repeated here.

In a twelfth aspect, an embodiment of the present application provides a device for identifying an ONU connection port of an optical network unit, which is characterized by including a memory and a processor; the memory is used to store computer execution instructions. When the device is running, the processing The device executes the computer-executable instructions stored in the memory, so that the device executes the method in any one of the solutions of the first aspect.

In a thirteenth aspect, an embodiment of the present application provides a device for identifying an ONU connection port of an optical network unit, which is characterized by including a memory and a processor; the memory is used to store execution instructions, and when the device is running, the processor The execution instruction stored in the memory is executed, so that the device executes the method in any of the solutions of the second aspect.

In a fourteenth aspect, the present application provides a readable storage medium in which an execution instruction is stored. When at least one processor of an ONU executes the execution instruction, the ONU executes any of the solutions in the first aspect method.

In a fifteenth aspect, the present application provides a readable storage medium in which an execution instruction is stored. When at least one processor of a device executes the execution instruction, the device executes any of the solutions in the second aspect method.

In a sixteenth aspect, this application provides a program product, which includes an execution instruction, and the execution instruction is stored in a readable storage medium. At least one processor of the ONU may read the execution instruction from a readable storage medium, and the execution of the execution instruction by the at least one processor causes the ONU to execute the method in any one of the solutions of the first aspect.

In a seventeenth aspect, the present application provides a program product. The program product includes an execution instruction, and the execution instruction is stored in a readable storage medium. At least one processor of the device can read the execution instruction from a readable storage medium, and the execution of the execution instruction by the at least one processor causes the device to execute the method in any one of the solutions of the second aspect.

Description of the drawings

FIG. 1 is a schematic structural diagram of a passive optical network system provided by an embodiment of this application;

FIG. 2 is a schematic diagram of a reflection curve obtained by an ONU according to an embodiment of the application;

3A is a schematic structural diagram of an optical splitter provided by an embodiment of the application;

3B is a schematic structural diagram of another optical splitter provided by an embodiment of the application;

FIG. 4 is a schematic structural diagram of an OLT provided by an embodiment of the application;

FIG. 5A is a schematic structural diagram of an ONU provided by an embodiment of this application;

FIG. 5B is a schematic structural diagram of another ONU provided by an embodiment of this application;

6A is a schematic structural diagram of a reflector provided by an embodiment of the application;

6B is a schematic structural diagram of another reflector provided by an embodiment of the application;

FIG. 7 is a method for identifying an ONU connection port provided by an embodiment of the application;

8A is a schematic diagram of reflection curves of multiple ONUs according to an embodiment of the application;

FIG. 8B is a schematic diagram of a reflection curve of an ONU 1 provided by an embodiment of the application; FIG.

FIG. 9 is another method for identifying an ONU connection port provided by an embodiment of the application;

FIG. 10 is a schematic diagram of a PON system provided by an embodiment of the application;

FIG. 11 is a schematic diagram of the intensity distribution of the echo optical signal of the ONU 4 measured by each ONU according to an embodiment of the application;

FIG. 12 is another method for identifying an ONU connection port provided by an embodiment of this application;

FIG. 13 is a schematic structural diagram of a device provided by an embodiment of this application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

Wherein, in the description of this application, unless otherwise specified, "plurality" means two or more than two. In addition, "/" indicates that the associated objects before and after are in an "or" relationship, for example, A/B can indicate A or B; the "and/or" in this application is only an association relationship that describes the associated objects. It means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. Moreover, in order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with substantially the same function and effect. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not limit the difference. It should also be noted that, unless otherwise specified, the specific description of some technical features in one embodiment can also be used to explain the corresponding technical features in other embodiments.

Please refer to FIG. 1, which is a schematic diagram of a system architecture provided by an embodiment of the application. The system includes: a passive optical network PON system 100 and a network management server 140 coupled with the passive optical network PON system 100. The network management server 140 may be the Internet, Community Access Television (CATV) network, Public Switched Telephone Network (PSTN), Network Operations Centre (NOC), cloud computing The server in the platform, etc.

The PON system 100 includes at least one optical line terminal OLT110, a plurality of optical network units ONU (equipment) 120, and an optical distribution network ODN130. It should be understood that the network management server 140 may also be a device in the PON system 100, and the network management server 140 is coupled with the OLT 110. In this application, the OLT 110 is connected to the multiple ONUs 120 through the ODN 130. Among them, the direction from the OLT 110 to the ONU 120 is defined as the downstream direction, and the direction from the ONU 120 to the OLT 110 is the upstream direction.

The PON system 100 may be a communication network that does not require any active devices to realize data distribution between the OLT 110 and the ONU 120. For example, in a specific embodiment, the data distribution between the OLT 110 and the ONU 120 may be implemented by passive optical devices (such as optical splitters) in the ODN 130. In addition, the PON system 100 may be a passive optical network (Asynchronous Transfer Mode Passive Optical Network, ATM PON) system or a broadband passive optical network (Broadband Passive Optical Network) defined by the ITU-T G.983 standard. BPON) system, Gigabit Passive Optical Network (GPON) system defined by ITU-T G.984 standard, Ethernet Passive Optical Network (EPON) defined by IEEE1002.3ah standard, Or Next-Generation Passive Optical Network (NG PON), such as 10 Gigabit Passive Optical Network (XGPON) or 10 Gigabit Ethernet Passive Optical Network (NG PON) Passive Optical Network, 10GEPON, etc. The entire contents of the various passive optical network systems defined by the above standards are incorporated in this application document by reference.

The OLT 110 is usually located in a central location (for example, Central Office, CO), and it can manage one or more ONUs 120 in a unified manner. The OLT 110 can act as an intermediary between the ONU 120 and the network management device 140, and forward the data received from the network management device 140 as downstream data to the ONU 120 through the ODN 130, and forward the upstream data received from the ONU 120 to the network management device 140.

The ONU 120 may be distributed in a user-side location (such as a user's premises). The ONU 120 may be a device used to communicate with the OLT 110 and the user. Specifically, the ONU 120 may serve as an intermediary between the OLT 110 and the user. For example, the ONU 120 may forward the downstream data received from the OLT 110 to the user, and forward the data received from the user to the OLT 110 through the ODN 130 as upstream data. It should be understood that optical network terminals (Optical Network Terminal, ONT) are generally applied to end users, such as optical modems, etc.; and ONU 120 may be applied to end users, and may also be connected to end users through other networks (such as Ethernet). In this application, the ONU 120 is taken as an example for description, and the ONU 120 and the ONT can be interchanged.

The ODN 130 may include optical fibers, optical couplers, optical splitters, and/or other devices. In an embodiment, the optical fiber, optical coupler, optical splitter and/or other equipment may be passive optical devices. That is, the optical fiber, optical coupler, optical splitter, and/or other devices may be devices that do not require power support for distributing data signals between the OLT 110 and the ONU 120. In addition, in other embodiments, the ODN 130 may also include one or more active devices, for example, an optical amplifier or a relay device. In the branch structure shown in Figure 1, the ODN130 can specifically extend from the OLT110 to the multiple ONUs 120 in the form of two-level splitting, but it can also be configured as any other point-to-multipoint (such as one-level splitting or multi-level splitting) or point To the point of the structure. The embodiment of the present application is described by taking two-level spectroscopy as an example. The first-level spectroscopy and multi-level spectroscopy (three-level and above spectroscopy) are similar, and this application is not limited thereto.

Please refer to Figure 1. ODN130 uses splitters to implement data distribution. For reliability and operation and maintenance considerations, ODN130 can be deployed in a two-stage splitter, including a first-stage splitter 131 and multiple second-stage splitters.器132. The common end of the first-stage optical splitter 131 is connected to the OLT 110 through a backbone fiber (Feed Fiber) 133, and its branch ends are respectively connected to the common end of the second-stage optical splitter 132 through a distribution fiber (Distribute Fiber) 134. At the end, the branch end of each second-stage optical splitter 132 is further connected to the corresponding uplink interface 1201 of the optical network terminal 120 through a drop fiber (Drop Fiber) 135 respectively. In the downstream direction, the downstream data signal sent by the OLT 110 passes through the first-stage optical splitter 131 for the first splitting, and then passes through the second-stage splitter 132 for the second splitting, thereby forming multiple downstream optical signals and transmitting them to Each ONU120. In the upstream direction, the upstream data signals sent by each ONU 120 are sequentially combined by the second-stage optical splitter 132 and the first-stage optical splitter 131 before being transmitted to the OLT 110. Among them, the first-level optical splitter 131 may be deployed in an optical distribution frame (ODF) closer to the central office, and the second-level optical splitter 132 may be deployed in a remote node (RN). Among them, for the deployment mode of the second-stage optical splitter, the second-stage optical splitter 132 is the final-stage optical splitter, and the first-stage optical splitter 131 is the previous-stage optical splitter connected to the last-stage optical splitter; and for the deployment of the first-stage optical splitter, The first-stage optical splitter is the last-stage optical splitter; for the deployment of three-stage optical splitter, the third-stage optical splitter is the last-stage optical splitter, and the second-stage optical splitter is the previous-stage optical splitter connected to the last-stage optical splitter. The first-stage optical splitter is the previous-stage optical splitter connected to the second-stage optical splitter. It can be seen from the above that the first-stage optical splitter in this application refers to the optical splitter closer to the OLT 110.

The following briefly introduces some terms that will be used in this application.

The echo optical signal is a signal generated by backscattering and/or reflection of the upstream test optical signal sent by the ONU 120 during the transmission of the ODN 130. The intensity information of the echo optical signal refers to measurement parameters that can characterize the power or amplitude of the echo optical signal, such as the instantaneous amplitude, instantaneous power, average power, and height of the reflection peak of the reflection curve of the echo optical signal. It should be understood that when the intensity information includes the instantaneous amplitude, the intensity information may further include the instantaneous amplitude time, for example, the time delay relative to the sending moment of the uplink test optical signal; when the intensity information includes In the case of the height of the reflection peak of the reflection curve, the intensity information may further include the distance of the reflection peak.

Those skilled in the art should understand that the reflection curve can record the transmission distance of the echo optical signal and the intensity of the echo optical signal. The reflection curve may be specifically called an optical time domain reflectometer (optical time domain reflectometer, OTDR) curve, or may have other names, which are not limited in this application. In this application, the echo optical signal is the echo optical signal generated by the uplink test optical signal in the optical fiber network.

FIG. 2 is a schematic diagram of the reflection curve obtained by the ONU 120. Exemplarily, the abscissa of the reflection curve is the transmission distance of the echo optical signal, and the ordinate is the power of the echo optical signal. It should be understood that the abscissa of the reflection curve can also be the transmission time of the echo optical signal, and the transmission time of the echo optical signal multiplied by the transmission speed is equal to the transmission distance of the echo optical signal. Therefore, it can be considered that the echo optical signal is transmitted. The transmission time of the wave light signal also characterizes the distance of the transmission of the echo light signal.

The curve area where the slope of the reflection curve changes can be called an event. For example, at attenuation event 1 and attenuation event 2 in the figure, the reflection curve drops, and the slope is greater than the first slope threshold. Attenuation events may be caused by the transmission of optical signals through optical splitters, fiber splicing, or fiber bending. For another example, at reflection event 1 and reflection event 2 in the figure, the reflection curve rises, and the slope is greater than the second slope threshold, forming a reflection peak. The reflection peak represents a reflection event, so in this application, the reflection peak and the reflection event can be interchanged. The reflection peak may be caused by the transmission of the upstream test optical signal through the reflection point, reflector, or mechanical connection. The distance of the reflection peak indicates the transmission distance of the echo optical signal forming the reflection peak. Specifically, the echo optical signal is received by the ONU 120 after being transmitted the distance of the reflection peak. The distance of the reflection peak can be represented by the abscissa of the reflection peak in the reflection curve, and specifically can be represented by the abscissa of the highest point, starting point, or center point of the reflection peak. The height of the reflection peak indicates the intensity of the echo optical signal, and it can be represented by the distance of the ordinate between the highest point and the starting point of the reflection peak in the reflection curve, or as the difference between the highest point and the end point of the reflection peak. The distance between the ordinates is expressed. For details, please refer to the reflection peak 1 in Figure 2.

FIG. 3A is a schematic structural diagram of an optical splitter 300-1 provided by an embodiment of the application. The optical splitter 300-1 may be any one-stage optical splitter in the ODN130. Specifically, the optical splitter 300-1 may be the first-stage optical splitter 131 in FIG. 1 or the second-stage optical splitter 132. The optical splitter 300-1 may include one first side port A1, or may include two first side ports A1 and A2; the optical splitter 300-1 includes N second side ports, specifically second side ports B1, B2 ,...BN, where N is an integer greater than 1. The optical splitter 300-1 may specifically be a Planar Lightwave Circuit Splitter (PLC Splitter), a Thin Film Filter, or a fusion taper splitter.

In an embodiment, the optical splitter 300-1 is the first-stage optical splitter 131 in FIG. 1, then the first side port A1 can be connected to the OLT 110 through the backbone fiber 133; the second side port B1-BN can be connected to the OLT 110 through the distribution fiber 134 is connected to a plurality of second-stage optical splitters 132. If the optical splitter 300-1 also includes a first side port A2, the first side ports A1 and A2 are respectively connected to two OLT 110 through two backbone fibers 133, or the first side ports A1 and A2 are connected through two backbone fibers 133 To an optical switch selector, and then connect to an OLT110. At this time, the optical splitter 300-1 can be used in the scene of light protection switching to realize backup protection. In addition, the first side port A2 can also be suspended. Each of the second side ports can be connected to a corresponding second-stage optical splitter 132 through a distribution optical fiber 134. It should be understood that one or more of the second side ports may also be suspended. In this application, floating refers to not connecting other devices, ports, etc. It should be understood that a protector can also be provided for the suspended port.

In an embodiment, if the optical splitter 300-1 is the second-stage optical splitter 132 in FIG. 1, the first side port A1 may be connected to the first-stage optical splitter 131 through the distribution fiber 134; the second side port B1 -BN can be connected to multiple ONUs 120 through branch fiber 135. It should be understood that the optical splitter 300-1 may also include a first side port A2, and the connection relationship is similar to the foregoing embodiment, and will not be repeated here.

The splitting ratio of the spectroscope 300-1 is 1×N or 2×N. It should be understood that the optical splitting ratio here refers to the ratio of the ports on both sides of the optical splitter. For example, the optical splitting ratio of the optical splitter 300-1 is 1×N, which means that the optical splitter 300-1 includes 1 first side port and N ports. The second side port, the optical splitter 300-1 may also be referred to as a 1-to-N optical splitter. In addition, the optical splitter mentioned in this application may be an equal-ratio optical splitter. For example, the optical powers of the N optical signals obtained by splitting by the optical splitter 300-1 are the same; the optical splitter mentioned in this application may be unequal. The optical power of the optical splitter, for example, the N paths of optical signals obtained by splitting by the optical splitter 300-1 are different. The comparison of this application is not limited.

As an optional manner, the optical splitter 300-1 may be composed of multiple sub-splitters, and the splitting ratio of the sub-splitters is generally 1×2 or 2×2, then the multiple sub-splitters include one first stage Sub-splitter S11, 2 second-stage sub-splitters S21, S22,..., and P final-stage sub-splitters SZ1, SZ2,...SZY,...SZP (Z-th sub-splitter, Z is a positive integer). Among them, P is a positive integer, and N=2P; Y is any positive integer from 1 to P.

One side port of the first-stage sub-splitter S11 is the first-side port of the optical splitter 300-1, and each of the other-side ports of the first-stage sub-splitter S11 is connected to the second-stage sub-splitter S21 and S22: One port of the second-level sub-splitter (S21, S22) is connected to the first-level sub-splitter S11, and each port on the other side is connected to the third-level sub-splitter (S31, S32, S33) , S34). The connection relationship of the other sub-splitters is similar, and will not be repeated here.

The last-stage sub-splitter S ZY is used for description, where Y is any positive integer from 1 to P, that is, the last-stage sub-splitter S ZY can be any last-stage sub-splitter. The last-stage sub-splitter S ZY may include one third-side port C1 and two fourth-side ports D1 and D2, the third-side port C1 is connected to the previous-stage sub-splitter, and the fourth-side port D1 And D2 is the second side port of the optical splitter 300-1. It should be noted that in the present application, the fourth side port of the final sub-splitter S ZY can be connected to the second side port of the optical splitter 300-1 through a waveguide or an optical fiber. For the convenience of description, this situation may be referred to as the terminal for short. The fourth side port of the sub-splitter S ZY is the second side port of the optical splitter 300-1. In the present application, the port information of the fourth side port is used to indicate which port in the final sub-splitter, such as D1, D2, etc., and the port information of the second side port is used to indicate Which one of the ports in the optical splitter 300-1 is the second side port, such as B1, B2...BX and so on.

The final sub-splitter SZY may also include another third side port C2, and the third side port C2 may be suspended.

It should be understood that the light splitting ratio of the sub-splitter may also be other light splitting ratios such as 1×3 or 2×3, and the connection relationship is similar, so it will not be repeated here.

In the present application, the second side port of the optical splitter 300-1 is provided with a first reflector. It should be understood that the first reflector may be a reflector built into the second side port of the optical splitter 300-1, or may be a reflector externally installed at the second side port of the optical splitter 300-1, for example, the first reflector The device is connected to the second side port through an optical fiber. The structure of the first reflector may refer to the reflector 600-1 shown in FIG. 6A or the reflector 600-2 shown in FIG. 6B.

In an embodiment, each of the N second side ports is provided with a first reflector. Specifically, the second side port BX is provided with a first reflector R1X, where X is a positive integer less than or equal to N, such as 1, 2, ..., N. The reflectivity of the first reflector has a corresponding relationship with the port information of the second side port where the first reflector is located. The corresponding relationship may specifically be a mapping relationship. In an embodiment, the corresponding relationship is an increasing function mapping relationship. As an example of a linear increasing function, the reflectance of the first reflector R1X of the BX port is RV1+(X-1)ΔRV1. For example, the reflectance of the first reflector R11 at the B1 port is RV1, and the reflectance of the first reflector R12 at the B2 port is RV1+ΔRV1. It should be understood that the increasing function relationship may also be other increasing function relationships other than the above linear increasing function, such as a power function with an exponent greater than 0, an exponential function with a base greater than 1, and the like. In an embodiment, the corresponding relationship is a subtractive function mapping relationship, such as a linear subtractive function, a power function with an exponent less than 0, and so on. In an embodiment, the correspondence is a one-to-one correspondence recorded in a table format. At this time, the corresponding relationship may not satisfy the functional relationship. Take Table 1 as an example. It should be understood that B1-BX is an exemplary representation of port information. The port information of the second side port is used to identify the second side port of the optical splitter 300-1, and may specifically include a port identifier, a port name, or an assigned port serial number, and so on. Since the reflectivity of the first reflector corresponds to the port information of the second side port where the first reflector is located, the reflectivity of the first reflector can also be used to identify the optical splitter 300-1. The second side port.

Table 1. Correspondence table between reflectivity of reflector and port information of the port where the reflector is located

端口信息Port information	反射率Reflectivity
B ₁ B ₁	-40dB-40dB
B ₂ B ₂	-35dB-35dB
B ₃ B ₃	-32dB-32dB
B ₄ B ₄	-30dB-30dB
……	……

When the upward optical signal is transmitted to the first reflector, part of the optical signal is reflected, thereby forming an echo optical signal of the upward optical signal. The intensity information of the echo optical signal has a corresponding relationship with the reflectivity of the first reflector. For example, the greater the reflectivity of the first reflector, the greater the intensity of the echo optical signal (for example, the greater the power/amplitude of the echo optical signal). Furthermore, according to the corresponding relationship between the reflectivity of the first reflector and the port information of the second side port where the first reflector is located, it can be determined that the intensity information of the echo optical signal is related to the first reflector where the first reflector is located. Correspondence of the port information of the ports on the two sides. Therefore, the port information of the second side port through which the uplink optical signal passes can be determined according to the intensity information of the echo optical signal.

In another embodiment, N-1 of the N second side ports are all provided with a first reflector. Regarding the N-1 ports, reference may be made to the description of the foregoing embodiment, which is not repeated here. In this case, only one second side port is not provided with a first reflector (equivalent to the second side port is provided with a first reflector with a reflectivity of 0), then the uplink optical signal generated by the second side port is returned The intensity of the wave optical signal is small, and the port information of the second side port can also be determined according to the intensity information of the echo optical signal of the uplink optical signal transmitted from the second side port.

In the optical splitter 300-1 provided in the embodiment of the present application, a first reflector is provided at the second side port, and the reflectivity of the first reflector is consistent with the port information of the second side port where the first reflector is located There is a corresponding relationship, therefore, the second side port of the optical splitter 300-1 can be identified by the reflectance of the first reflector at the port. Taking the last-stage optical splitter in the PON system as the optical splitter 300-1 as an example for description, the first ONU 120 is connected to a second side port of the optical splitter 300-1. The first ONU 120 sends an uplink test optical signal. When the uplink test optical signal is transmitted to the second side port, part of the optical signal is reflected by the first reflector at the second side port, thereby forming an echo optical signal. The intensity information of the echo optical signal has a corresponding relationship with the reflectivity of the first reflector, and the reflectivity of the first reflector has a corresponding relationship with the port information of the port where the first reflector is located, Therefore, the intensity information of the echo optical signal has a corresponding relationship with the port information of the port where the first reflector is located. Therefore, by acquiring the intensity information of the echo optical signal, the port information of the port where the first reflector is located, that is, the port information of the final optical splitter connected to the ONU 120 can be determined. Further, for each ONU 120 in the PON system, the port information of the last-stage optical splitter connected to it can be determined, and the PON topology can also be determined. This makes it possible to quickly and correctly determine the point of occurrence when the PON system fails, and improve the efficiency of troubleshooting.

FIG. 3B is a schematic structural diagram of another optical splitter 300-2 provided by an embodiment of the application. The structure of the optical splitter 300-2 is similar to that of the optical splitter 300-1. For the first side port, the second side port, the sub-splitter structure of the optical splitter 300-2, and the connection of the optical splitter 300-2, please refer to FIG. 3A The description of the illustrated embodiment will not be repeated here.

Here is a detailed introduction to the structure of the final sub-splitter SZ1-SZP, and how to set the second reflector R21-R2P and the third reflector R31-R3P.

In an embodiment, each final-stage sub-splitter includes two third-side ports C1, C2 and two fourth-side ports D1, D2, and one of the third-side ports C1 is connected to the previous-stage sub-splitter. For the optical splitter, the other third side port C2 may be suspended, and the two fourth side ports are the second side ports of the optical splitter 300-2.

As an optional manner, the suspended third side port C2 of each final sub-splitter is provided with a second reflector. The second reflector may be built-in or external to the suspended third side port, and the structure of the second reflector may refer to reflector 600-1 shown in FIG. 6A or shown in FIG. 6B The reflector 600-2. Setting a second reflector at the suspended third side port C2 of the final sub-splitter can reduce the optical signal loss introduced by the second reflector, thereby reducing the impact of the second reflector on the transmission of service optical signals in the ODN network. influences. Specifically, when the downstream optical signal is transmitted from the optical splitter 300-2, it will not pass through the suspended third side port C2, so the downstream optical signal will not be reflected by the second reflector, thus reducing the transmission loss of the downstream optical signal .

Optionally, the floating third side port C2 of each final sub-splitter is provided with a second reflector R2Y, where Y is any positive integer from 1 to P, such as 1, 2, ..., P. The reflectivity of the second reflector has a corresponding relationship with the identifier of the final sub-splitter where the second reflector is located. The corresponding relationship may specifically be a mapping relationship, such as an increasing function mapping relationship or a decreasing function mapping relationship. In an embodiment, the correspondence between the reflectivity of the second reflector and the identification of the final sub-splitter where the second reflector is located may also be a one-to-one correspondence recorded in a table format. For details, reference may be made to the description in the embodiment shown in FIG. 3A. As an example of a linear increasing function, the reflectivity of the second reflector R2Y of the final sub-splitter SZY is RV2+(Y-1)ΔRV2. For example, the reflectance of the second reflector R21 of the final sub-splitter SZ1 is RV2, and the reflectivity of the second reflector R22 of the final sub-splitter SZ2 is RV2+ΔRV2. Compared with the spectroscope 300-1, the reflectivity range of the second reflector of the spectroscope 300-2 is RV2-RV2+(P-1)ΔRV2, and the reflectivity range of the first reflector of the spectroscope 300-1 is RV1 -RV1+(N-1)ΔRV1. When the splitting ratio of the final sub-splitter is 1:2 or 2:2, P=N/2. Therefore, when the two reflectance change accuracy ΔRV2 and ΔRV1 are the same, the reflectance range of the second reflector of the beam splitter 300-2 is smaller than the reflectance range of the first reflector of the beam splitter 300-1, that is, RV2+( P-1) ΔRV2 is smaller, so that the optical signal loss caused by the reflector is smaller; when the reflectivity changes range of the two are the same, the reflectivity change accuracy of the second reflector of the optical splitter 300-2 is greater than that of the optical splitter 300- The reflectivity change accuracy ΔRV1 of the first reflector of 1 is greater, and thus the port measurement accuracy of the optical splitter 300-2 is higher, and the implementation cost of the measurement equipment (test equipment or ONU120 equipment) is also reduced.

It should be understood that the identifier of the last-stage sub-splitter may be used to identify the last-stage sub-splitter of the optical splitter 300-2, specifically including the serial number assigned to the last-stage sub-splitter, the number of the last-stage sub-splitter Port information of the third port, or port information of the fourth port of the final sub-splitter, etc. Since the reflectivity of the second reflector corresponds to the identification of the final sub-splitter, the reflectivity of the second reflector can also be used to identify the final sub-splitter of the optical splitter 300-2.

When the upward optical signal is transmitted to the second reflector, part of the optical signal is reflected to form an echo optical signal of the upward optical signal. The intensity information of the echo optical signal is related to the reflectivity of the second reflector. Correspondence. Furthermore, according to the correspondence between the reflectivity of the second reflector and the identification of the final sub-splitter where the second reflector is located, it can be determined that the intensity information of the echo optical signal is related to the location of the second reflector. The corresponding relationship of the identification of the final sub-splitter. In addition, the echo optical signal is transmitted from the fourth side port of the final sub-splitter where the second reflector is located, but not from the fourth side port of other final sub-splitters. Therefore, by acquiring the intensity information of the echo optical signals transmitted from multiple fourth side ports, it is also possible to determine the fourth side port belonging to the same final sub-splitter.

Any one of the fourth side ports of each final sub-splitter can be provided with a third reflector, and the reflectivity of the third reflector is used to distinguish different fourth side ports in the same final sub-splitter . It should be understood that in this case, the reflectivity of the third reflectors of different final sub-splitters in the same optical splitter 300-2 may be the same or different.

Specifically, the fourth side port D1 or D2 of the final sub-splitter SZY may be provided with a third reflector. Take the third reflector at the fourth side port D1 as an example for description. When the upstream optical signal transmitted from the fourth side port D1 is transmitted to the third reflector R3Y, the third part of the optical signal in the upstream optical signal is reflected by the third reflector R3Y, and then from the fourth side port D1 transmission; when the remaining optical signal in the upstream optical signal is transmitted to the second reflector R2Y of the final sub-splitter SZY, the fourth part of the remaining optical signal is reflected, and then the fourth part The fifth part of the optical signal in the optical signal is transmitted from the fourth side port D1, and the sixth part of the optical signal in the fourth part of optical signal is transmitted from the fourth side port D2. Therefore, the echo optical signal transmitted from the fourth side port D1 includes the third partial optical signal and the fifth partial optical signal, the echo optical signal transmitted from the fourth side port D2 includes the sixth partial optical signal, and The third part of the optical signal is not included. Therefore, the intensity of the echo optical signal transmitted from the fourth side port D2 is greater than the intensity of the echo optical signal transmitted from the fourth side port D1. Therefore, by comparing the intensity of the echo optical signals transmitted from the two fourth-side ports belonging to the same final sub-splitter, it can be determined which port of the final sub-splitter is the two fourth-side ports. .

It should be understood that if each final sub-splitter includes Q fourth-side ports, and Q is an integer greater than 1, then each of the Q fourth-side ports of each final sub-splitter can be set with a third port. reflector. Or each of the (Q-1) fourth-side ports of each final sub-splitter can be equipped with a third reflector, and the other fourth-side port is not equipped with a third reflector. In this case, also It can be considered that the other fourth side port is provided with a third reflector with a reflectivity of zero. And the reflectivity of the third reflectors of different fourth side ports in the same final sub-splitter is different, so that different fourth sides in the same final sub-splitter can be distinguished by the reflectivity of the third reflector port. Specifically, the reflectivity of the third reflector has a corresponding relationship with the port information of the fourth port where the third reflector is located. The corresponding relationship may specifically be a mapping relationship, such as an increasing function mapping relationship or a decreasing function mapping relationship. In addition, the correspondence is a one-to-one correspondence recorded in a table format. For details, reference may be made to the description in the embodiment shown in FIG. 3A.

Still consider the case of Q=2. Optionally, the suspended third side port C2 of each final sub-splitter is provided with a second reflector, and the reflectivity of the second reflector of each final sub-splitter may be the same or different . Any one of the two fourth side ports of each final sub-splitter can be provided with a third reflector, and the reflectivity of the third reflector is the same as the port of the second side port where the third reflector is located. The information has a corresponding relationship, that is, the reflectances of the third reflectors in different final sub-splitters in the same optical splitter 300-2 are different. The reflectivity of the third reflector can be used to distinguish different second side ports in the beam splitter 300-2. The reflectivity of the third reflector has a corresponding relationship with the port information of the second side port where the third reflector is located. The corresponding relationship may specifically be a mapping relationship, such as an increasing function mapping relationship or a decreasing function mapping relationship. In addition, the correspondence is a one-to-one correspondence recorded in a table format. For details, reference may be made to the description in the embodiment shown in FIG. 3A.

As an optional manner, a second reflector may be provided at the third side port C1 of each last-stage sub-splitter connected to the previous-stage sub-splitter. Similarly, the structure and reflectivity of the second reflector can be referred to the description of the foregoing embodiment.

As an optional manner, a second reflector (not shown in the figure) may be provided on the branch where the two third-side ports C1 and C2 are connected in each final sub-splitter. For ease of description, hereinafter, the branch where the two third-side ports C1 and C2 are both connected is simply referred to as the common branch of the third-side port. Wherein, the common branch of the third side port may specifically be an optical fiber or a waveguide. The specific content such as the structure and reflectivity of the second reflector are similar to the foregoing embodiment, and reference may be made to the description of the foregoing embodiment, which will not be repeated here.

In an embodiment, each final sub-splitter includes two third side ports C1, but does not include a floating third side port C2, then each final sub-splitter is connected to the previous sub-splitter The third side port C1 of the optical device may be provided with a second reflector, or the common branch of the third side port of each final sub-splitter may be provided with a second reflector. For details, please refer to the above description and will not be repeated here.

The optical splitter 300-2 provided in the embodiment of the present application is connected to the third side port of the last-stage sub-splitter, or the common branch connected to both third-side ports, or the third side of the previous sub-splitter. The side port is provided with a second reflector. If the upstream test optical signal is transmitted from a fourth side port of a final sub-splitter to the second reflector of the final sub-splitter, it is reflected to form an echo optical signal, and the echo optical signal can be transmitted from all The multiple fourth-side ports of the last-stage sub-splitters are transmitted, but the fourth-side ports of other last-stage sub-splitters are not transmitted. Thereby, multiple fourth-side ports connected to the same final sub-splitter can be determined.

FIG. 4 is a schematic structural diagram of an OLT 110 provided by an embodiment of the application. The specific structure and configuration of OLT110 may vary depending on the specific type of ODN100. As shown in FIG. 4, the OLT 110 may include a downstream interface 1101, a coupler 1102, a downstream optical signal transmitter 1103, an upstream optical signal receiver 1104, a storage module 1105, a processing module 1106, and a MAC module 1107.

Among them, the downstream interface 1101 may be an optical fiber adapter, which is used as an interface connected to the ODN 130 to send or receive upstream/downstream optical signals. The coupler 1102 is arranged on the main optical path along the extending direction of the downlink interface 1101 and has a certain included angle with the main optical path. The coupler 1102 can couple at least a part of the downstream optical signal transmitted by the downstream optical signal transmitter 1103 to the downstream interface 1101, and couple at least a part of the upstream optical signal input from the downstream interface 1101 to the upstream optical signal receiver 1104. The wavelength of the downstream optical signal is λ1. The wavelength of the upstream optical signal received by the OLT 110 is λ2, and the upstream optical signal is an upstream service optical signal, that is, an optical signal used to transmit data sent by the ONU 120 to the OLT 110 in the time slot allocated by the OLT 110. The upstream optical signal may be the second upstream optical signal and the third upstream optical signal mentioned below.

The downstream optical signal transmitter 1103 can send the downstream optical signal provided by the MAC module 1107 through the downstream optical signal transmitter 1103 to the ONU 120 through the coupler 1102, the downstream interface 1101, and the ODN130. The downstream optical signal may include a first downstream optical signal, a second downstream optical signal, a third downstream optical signal, and so on. The uplink optical signal receiver 1104 can receive the uplink optical signal sent by the ONU 120 through the ODN 130, and after converting the uplink optical signal into an uplink electrical signal, the uplink electrical signal is provided to the MAC module 1107 for data analysis and processing.

As an optional manner, the upstream optical signal may include the intensity information of the echo optical signal generated in the ODN 130 for the upstream test optical signal (also referred to as the first upstream optical signal) sent by the ONU 120 through the ODN 130. The storage module 1105 can store the corresponding relationship between the intensity information of the echo optical signal and the information of the first port, where the first port refers to the port of the last-stage optical splitter to which the ONU 120 is connected. Then, the processing module 1106 may determine the information of the first port for sending the ONU 120 according to the intensity information of the echo optical signal sent by the ONU 120 and the correspondence between the intensity information of the echo optical signal and the information of the first port. The storage module 1105 may also store the corresponding relationship between the intensity information of the echo optical signal and the information of the second port, where the second port refers to the port of the previous-stage optical splitter connected to the last-stage optical splitter connected to the ONU 120. Then the processing module 1106 may further determine the information of the second port of the ONU 120 according to the intensity information of the echo optical signal sent by the ONU 120. The processing module 1106 may also determine the connection relationship between the ONU 120 and the ODN 130 according to the information of the first port and the information of the second port. Alternatively, the storage module 1105 may also store the topology structure of the ODN 130, and the processing module 1106 may determine the connection relationship between the ONU 120 and the ODN 130 according to the information of the first port and the topology structure of the ODN 130. In addition, the storage module 1105 may also store the information of the first port, the information of the second port, or the connection relationship with the ODN 130 of the ONU 120 determined above. For details, refer to the description in the embodiment shown in FIG. 7-12.

As an optional manner, the upstream optical signal may include the information of the first port and the second port of the ONU 120 reported by the ONU 120, or the connection relationship between the ONU 120 and the ODN 130, and so on. The storage module 1105 can store the above-mentioned information reported by the ONU 120. For details, refer to the description in the embodiment shown in FIG. 7-12.

Among them, the downstream optical signal transmitter 1103 may be a laser diode (LD), which is used to transmit a downstream optical signal with the first wavelength λ1 (hereinafter referred to as the downstream optical signal λ1); the upstream optical signal receiver 1104 may be a photoelectric A photodiode (PD), such as an avalanche photodiode (APD), is used to receive an uplink service optical signal with a second wavelength λ2 (hereinafter referred to as the uplink service optical signal λ2).

In an embodiment, the coupler 1102 may be a thin film filter (TFF), which may transmit about 100% of the downstream optical signal λ1, and perform about 100% of the upstream service optical signal λ2. % Reflection.

In an embodiment, the OLT 110 may further include a communication interface for communicating with the network management device 140. The communication interface can use any device such as a transceiver to communicate with the network management device 140 through a communication network, such as Ethernet, wireless access network (RAN), wireless local area network (Wireless Local Area Networks, WLAN), etc. .

FIG. 5A is a schematic structural diagram of ONU 120-1 provided by an embodiment of this application. As shown in Figure 5A, ONU 120-1 can include uplink interface 1201, first coupler 1202, second coupler 1203, echo optical signal receiver 1204, uplink optical signal transmitter 1205, downlink optical signal receiver 1206, and storage module 1207, a processing module 1208, and a MAC module 1209.

Wherein, the uplink interface 1201 may be an optical fiber adapter, which is used as an interface connected to the ODN 130 to send or receive uplink/downlink optical signals. The transmitted light paths of the first coupler 1202 and the second coupler 1203 overlap. The uplink optical signal transmitter 1205 is coupled to the transmission optical path of the second coupler 1203. The echo optical signal receiver 1204 is coupled to the reflection optical path of the second coupler 1203. The downstream optical signal receiver 1206 is coupled to the reflection optical path of the first coupler 1202.

The uplink interface 1201 sends the uplink service optical signal with the second wavelength λ2 (uplink service optical signal λ2) or the uplink test optical signal with the second wavelength λ2 (uplink test optical signal λ2, which can also be called the first uplink optical signal) to the OLT 110 ), and receiving the downstream optical signal with the first wavelength λ1 (downstream optical signal λ1) or receiving the echo optical signal with the upstream test optical signal λ2 with the second wavelength λ2 (hereinafter referred to as the echo optical signal λ2). The first coupler 1202 may be a TFF, which reflects the downstream optical signal λ1 sent by the OLT 110 to couple the downstream optical signal λ1 to the downstream optical signal receiver 1206, and transmits the echo optical signal λ2 to the second coupler 1203. The second coupler 1203 may be a ring-type coupler, and couples the echo optical signal λ2 to the echo optical signal receiver 1204. The first coupler 1202 and the second coupler 1203 can also transmit the uplink optical signal (including the uplink service optical signal λ2 and/or the uplink test optical signal λ2) sent by the uplink optical signal transmitter 1205 to the uplink interface 1201.

Among them, the upstream service optical signal is an optical signal sent by ONU120 to OLT110 for data transmission, such as an upstream optical signal used to report the intensity information of the echo optical signal to OLT110, or a final-stage optical splitter connected to ONU120 to OLT110 The information of the first port of the port or the third upstream optical signal of the connection relationship between the ONU 120 and the optical fiber network, etc.; and the upstream test optical signal is an optical signal sent by the ONU 120 for testing, such as the first upstream optical signal. It should be understood that the upstream service optical signal can also be used as an upstream test optical signal. For example, a certain upstream optical signal is used to transmit data to the OLT 110 and can also be used to measure the ODN 130. Therefore, the uplink test optical signal may be an uplink service optical signal including normal communication data, or a specific uplink optical signal including specific data (for example, "0101..." or all "1"s or arbitrary coded information).

The downlink optical signal receiver 1206 is used to receive the downlink optical signal λ1 through the first coupler 1202, and convert the downlink optical signal λ1 into a downlink electrical signal. The first wavelength λ1 may be 1490 nm, 1577 nm, or the like. The upstream optical signal transmitter 1205 is configured to transmit the upstream service optical signal λ2 and/or the upstream test optical signal λ2 through the second coupler 1203 and the first coupler 1202, and through the upstream interface 1201. Specifically, the uplink optical signal transmitter 1205 may send the uplink test optical signal λ2 according to the indication information and/or time information for sending the uplink test optical signal in the downlink electrical signal parsed by the MAC module 1209, or the uplink optical signal transmitter 1205 may Send the uplink test optical signal λ2 according to the indication information and/or time information sent by the processing module. The wavelengths of the upstream service optical signal λ2 and the upstream test optical signal λ2 are the same, and λ2 can be 1310 nm or 1290 nm, and so on.

The echo optical signal receiver 1204 is used to receive the echo optical signal λ2 generated by the uplink test optical signal λ2 in the optical fiber network, and convert the echo optical signal λ2 into an echo electrical signal. The wavelength λ2 of the echo optical signal is the same as the wavelength λ2 of the upstream test optical signal. The processing module 1208 is configured to obtain the intensity information of the echo optical signal of the uplink test optical signal received by the echo optical signal receiver 1204. Specifically, the processing module 1208 may obtain the intensity information of the echo optical signal according to the test parameters in the downlink electrical signal parsed by the MAC module 1209. The storage module 1207 is used to store the test parameters and the intensity information of the echo optical signal.

The MAC module 1209 can be used to analyze the downlink electrical signal (such as the first downlink electrical signal converted from the first downlink optical signal) to obtain the instruction information and/or time information for sending the uplink test optical signal, and provide it to the processing Module 1208 or uplink optical signal transmitter 1205. The MAC module 1209 may also be used to analyze the downlink electrical signal (for example, the second downlink electrical signal obtained by conversion of the second downlink optical signal) to obtain test parameters and provide them to the processing module 1208.

As an optional manner, the upstream optical signal transmitter 1205 may further report the intensity information of the echo optical signal λ2 obtained by the processing module 1208 to the OLT 110 through the ODN130. The intensity information of the echo optical signal λ2 may specifically be obtained by the processing module 1208 measuring the echo optical signal λ2, or may be sent to the ONU 120-2 after the measuring device measures the echo optical signal λ2.

As an optional manner, the storage module 1207 may also store the corresponding relationship between the intensity information of the echo optical signal and the information of the first port, and the processing module 1208 may also determine the ONU 120-1's intensity information according to the intensity information of the echo optical signal acquired by itself. The information of the first port; the processing module 1208 may further determine the information of the second port of the ONU 120-1, the connection relationship between the ONU 120-1 and the ODN 130, and so on. The upstream optical signal transmitter 1205 may also report the determined information of the first port and the second port of the ONU 120-1, or the connection relationship between the ONU 120-1 and the ODN 130 to the OLT 110 through the ODN 130. For specific content, please refer to the description in the embodiment shown in FIG. 7-12 for details.

In the embodiment corresponding to FIG. 5A, the wavelength of the uplink test optical signal is the same as the wavelength of the uplink service optical signal.

FIG. 5B is a schematic structural diagram of another ONU 120-2 provided by an embodiment of the application. The ONU 120-2 provided in FIG. 5B includes an uplink interface 1201, a first coupler 1202, a downlink optical signal receiver 1206, a storage module 1207, a processing module 1208, and a MAC module 1209. The difference from the structure of the ONU 120-1 provided in FIG. 5A is that the ONU 120-2 includes a third coupler 1211, a fourth coupler 1212, an echo optical signal receiver 1213, and an upstream optical signal transmitter. Wherein, the uplink optical signal transmitter includes an uplink test optical signal transmitter 1214 (also referred to as a first uplink optical signal transmitter) and an uplink service optical signal transmitter 1215 (also referred to as a second uplink optical signal transmitter). ). It should be understood that the uplink test optical signal transmitter 1214 and the uplink service optical signal transmitter 1215 can be two independent transmitters, or they can be used to send the uplink test optical signal λ3 and can also be used to send the uplink test optical signal. A transmitter of λ2.

Wherein, the uplink interface 1201 may be an optical fiber adapter, which is used as an interface connected to the ODN 130 to send or receive uplink/downlink optical signals. The transmitted light paths of the first coupler 1202 and the third coupler 1211 overlap. The uplink service optical signal transmitter 1215 is coupled to the transmission optical path of the first coupler 1202. The downstream optical signal receiver 1206 is coupled to the reflection optical path of the first coupler 1202. The transmission light path of the third coupler 1211 overlaps with the reflection light path of the fourth coupler 1212. The upstream test optical signal transmitter 1214 is coupled to the reflected light path of the fourth coupler 1212. The echo optical signal receiver 1213 is coupled to the transmitted light path of the fourth coupler 1212.

Wherein, the uplink interface 1201 and the first coupler 1202 have the same functions as in FIG. 5A, and the details of the embodiment of the present application are omitted here. The first coupler 1202 is configured to transmit the uplink service optical signal (referred to as the uplink service optical signal λ2 for short) with the second wavelength λ2 and reflect the downlink optical signal (referred to as the downlink optical signal λ1 for short) with the first wavelength λ1. The third coupler 1211 is used to transmit the uplink test optical signal with the third wavelength λ3 (referred to as the uplink test optical signal λ3, which may also be referred to as the first uplink optical signal) and return to the received uplink test optical signal λ3. The reflection of the wave optical signal (referred to as the echo optical signal λ3) realizes the transmission of the third wavelength test signal of the same wavelength or wavelength band in two directions. The third coupler 1211 is also used to transmit the downstream optical signal λ1 and transmit the upstream service optical signal λ2. The fourth coupler 1212 is used to reflect the uplink test optical signal λ3 and transmit the echo optical signal λ3.

It should be understood that multiple couplers in the ONU120-2 can be combined into other optical paths, and the following conditions are sufficient: the downstream optical signal receiver 1206 receives the downstream optical signal λ1 sent by the upstream interface 1201, and the upstream service optical signal transmitter 1215 passes through The uplink interface 1201 sends the uplink service optical signal λ2, the uplink test optical signal transmitter 1214 sends the uplink test optical signal λ3 through the uplink interface 1201, and the echo optical signal receiver 1213 receives the echo optical signal λ3 sent by the uplink interface 1201.

The downstream optical signal receiver 1206 is configured to receive the downstream optical signal λ1 through the first coupler 1202 and the fourth coupler 1211, and convert the downstream optical signal λ1 into a corresponding downstream electrical signal. λ1 can be 1490 nm, 1577 nm, or the like. The upstream service optical signal transmitter 1215 is configured to send the upstream service optical signal λ2 to the OLT 110 through the first coupler 1202 and the fourth coupler 1211, and through the upstream interface 1201. λ2 can be 1310nm or 1290nm, etc. The echo optical signal receiver 1213 is used to receive the echo optical signal λ3 generated by the uplink test optical signal λ3 through the ODN130. λ3 can be 1650 nm or 1625 nm. The upstream test optical signal transmitter 1214 is used to send the upstream test optical signal λ3 to the OLT 110 (or ODN130) through the ODN130. The processing module 1208 is used to control the uplink test optical signal transmitter 1214 to send the uplink test optical signal λ3 or control the echo optical signal receiver 1211 to receive the echo optical signal λ3 according to the data (such as instruction information) in the downlink electrical signal parsed by the MAC module 1209 . The processing module 1208 may also be used to obtain the intensity information of the echo optical signal λ3. Specifically, the processing module 1208 may obtain the intensity information of the echo optical signal λ3 according to the test parameters in the downlink electrical signal parsed by the MAC module 1209. The storage module 1207 is used to store the test parameters and the acquired intensity information of the echo optical signal λ3. The MAC module 1209 is used to analyze the converted electrical signal to obtain data information and provide it to the processing module 1208, or the uplink test optical signal transmitter 1214, etc.

As an optional manner, the upstream service optical signal transmitter 1215 may further report the intensity information of the echo optical signal λ3 stored by the storage module 1207 to the OLT 110 through the ODN130.

As an optional manner, the storage module 1207 may store the corresponding relationship between the intensity information of the echo optical signal and the information of the first port, and/or the corresponding relationship between the intensity information of the echo optical signal and the information of the second port, and/ Or the topology of ODN130. The processing module 1208 may also determine the information of the first port, and/or the second port of the ONU 120-1, and/or the connection relationship with the ODN 130 according to the intensity information of the echo optical signal acquired by itself. The upstream optical signal transmitter 1215 may also report the determined first port information, second port information, or the connection relationship between the ONU 120-1 and the ODN 130 to the OLT 110 through the ODN 130. For specific content, please refer to the description in the embodiment shown in FIG. 7-12 for details.

In the embodiment corresponding to FIG. 5B, the wavelength of the uplink test optical signal λ3 is different from the wavelength of the uplink service signal λ2.

It is worth noting that, in FIGS. 5A and 5B, the ONU120 obtains the intensity signal of the echo optical signal can be obtained according to the echo optical signal measured by the ONU120 itself, or obtain the intensity of the echo optical signal according to the result of the echo optical signal measured by the OTDR information.

FIG. 6A is a schematic structural diagram of a reflector 600-1 provided by an embodiment of the application. The reflector 600-1 is applied to the beam splitter 300-1 or the beam splitter 300-2, such as a first reflector, a second reflector, or a third reflector. The reflector 600-1 may include a beam splitter 601, a first branch 602, a second branch 603, and a third branch 604.

Wherein, the optical splitter 601 may be a planar optical waveguide power splitter, a thin film filter, or a fusion tapered optical splitter, or the like. The first branch 602, the second branch 603, and the third branch 604 may be branches inside the ports of the optical splitter 300-1 or the optical splitter 300-2; they may also be the same as the ports of the optical splitter 300-1 or the optical splitter 300-2. Coupled branches. The above-mentioned branch may specifically be a waveguide, an optical fiber, or the like. In addition, the third branch 604 may be suspended, or may be set to include a reflective surface 605, for example, the reflective surface 605 is formed on the third branch 604 by an etched grating, or a coating.

The optical splitter 601 can split the uplink optical signal input from the first branch 602, and most of the optical signals in the uplink optical signal are output from the second branch 603, and then pass through the inside of the optical splitter 300-1 or 300-2, Furthermore, it outputs from the first side port A1 of the optical splitter 300-1 or 300-2. The other part of the optical signal in the upstream optical signal is transmitted from the third branch 604. When it is transmitted to the reflecting surface 605 or the floating point of the third branch 604, at least a part of the optical signal in the other part of the optical signal is reflected and then passes through The optical splitter 601 then transmits from the first branch 602 to form the echo optical signal of the upstream optical signal. Wherein, the uplink optical signal may specifically be an uplink test optical signal or an uplink service optical signal. It should be understood that the echo optical signal also includes other reflected signals or scattered signals, which can be ignored here.

The second branch 603 receives the downstream optical signal transmitted from the inside of the optical splitter 300-1 or 300-2. After the downstream optical signal passes through the optical splitter 601, at least a part of the optical signal is output from the first branch 602.

The reflectance Ref of the reflector 600-1 can be expressed by the following formula:

Wherein, Ra is the reflectivity of the reflective surface 605 or the reflectivity of the third branch 604 that is suspended; the ratio of the splitting power of the first branch 602 of the beam splitter 601 is 1:Sa. When the upstream optical signal is input from the first branch 602 and split by the optical splitter 601, the seventh part of the optical signal transmitted to the third branch 604 is 1/Sa of the upstream optical signal; the seventh part of the optical signal is reflected The eighth part of the optical signal formed by reflection from the floating point of the surface 605 or the third branch 604 is the Ra/Sa of the upstream optical signal, and the ninth part of the optical signal formed after the eighth part of the optical signal passes through the optical splitter 601 is the result of The Ra/(Sa×Sa) of the upstream optical signal, thus formula (1) is obtained. The reflectance Ref can also have other expressions, which are not limited in this application.

In this application, when the reflector 600-1 is applied to the optical splitter 300-1 or 300-2, the reflectance Ref of the reflector 600-1 corresponds to the port information of the port where the reflector 600-1 is located, and it can be specifically See the description of Figures 3A and 3B. It can be seen from formula (1) that the reflectivity Ref can be adjusted by adjusting the value of Ra and/or Sa, so that the reflectivity Ref of the reflector 600-1 meets the relationship between the port information described in FIGS. 3A and 3B Correspondence.

FIG. 6B is a schematic structural diagram of a reflector 600-2 provided by an embodiment of the application. The reflector 600-2 is applied to the beam splitter 300-1 or the beam splitter 300-2, such as a first reflector, a second reflector, or a third reflector. Wherein, FIG. 6B is a cross-sectional view of the reflector 600-2.

As an optional manner, the reflector 600-2 may be formed on the port of the beam splitter 300-1 or the beam splitter 300-2 by etching or photoetching. For example, a groove 607 is formed on the branch 605 inside the port of the optical splitter 300-1 or the optical splitter 300-2 by etching or photolithography, or the branch connected to the port of the optical splitter 300-1 or the optical splitter 300-2 A groove 607 is formed on 605 by etching or photolithography. The branch 605 may specifically be a waveguide or an optical fiber, and includes a core layer 606 and a cladding layer 608. There is a refractive index difference between the groove 607 and the core layer 606, so when the optical signal passes through the branch 605, part of the optical signal is reflected. The reflectivity of the reflector 600-2 is related to the number, size, and refractive index of the grooves 607.

Optionally, the reflector 600 can be controlled by adjusting the number of grooves 607 in the reflector 600-2 (the size of b in the figure) and the size of the grooves 607 (such as the length, width or height of the groove). The reflectivity of 2, so that the reflectivity of the reflector 600-2 has a corresponding relationship with the port information of the port where the reflector 600-2 is located. For details, please refer to the description of FIGS. 3A and 3B.

Optionally, the groove 607 can also be filled with a material with a refractive index different from that of the core waveguide 606, so that the number of grooves 607 and the size of the grooves 607 can be adjusted to control the reflector 600-2. The reflectivity, the reflectivity of the reflector 600-2 can also be controlled by setting the refractive index of the filling material.

Optionally, the reflectance of the reflector 600-2 is controlled by adjusting the refractive index of the core layer 606, for example, the refractive index of the core layer waveguide 606 is set to change periodically or change in sections. In this case, the groove 607 may be provided at the same time, or the groove 607 may not be provided.

FIG. 7 is a method for identifying an ONU connection port provided by an embodiment of the application, which is applied to a passive optical network system or an active optical network system. With reference to FIG. 1 to FIG. 6B, the method provided by the embodiment of the present application includes:

Step 701: The OLT 110 instructs the ONUi 120 to send an upstream test optical signal through the first downstream optical signal.

The first downstream optical signal may carry instruction information instructing the ONUi 120 to send the upstream test optical signal, and/or time information for the ONUi 120 to send the upstream test optical signal. For ease of presentation, the embodiment of the present application refers to the ONUi 120 that sends the upstream test optical signal as the first ONU 120.

The OLT 110 may select (for example, select randomly or in other ways) an ONU that has not sent an upstream test optical signal as the first ONU 120. For example, the OLT 110 identifies the ONU that has sent the upstream test optical signal, and determines the first ONU 120 that sends the upstream test optical signal next time from the ONUs that have not sent the upstream test optical signal. The first ONU 120 may also be the ONU 120 connected to the ODN 130 for the first time. For example, before step 701, the first ONU 120 sends a registration request to the OLT 110 through an upstream optical signal, and the OLT 110 determines that the first ONU 120 is the first time according to the registration request. Connected ONU120. As an optional manner, before step 701, the first ONU 120 requests the OLT 110 to authorize the port connection test through the upstream optical signal. For example, the first ONU 120 sends the second upstream optical signal to the OLT 110 to request the OLT 110 to authorize the first ONU 120 to send the upstream test optical signal, which specifically includes requesting the OLT 110 to allocate the test time, such as the time information for sending the upstream test optical signal.

The indication information may include the identification of the first ONU 120, such as the MAC address of the first ONU 120, the ONU ID allocated by the OLT 110 to the first ONU 120, and so on. The indication information may also include a control bit identifying whether to send an uplink test optical signal is a preset value, for example, the control bit is 1, indicating that an uplink test optical signal is sent.

The time information for sending the uplink test optical signal may include the start time of sending the uplink test optical signal, the end time of sending the uplink test optical signal, or the duration of sending the uplink test optical signal, etc.

Step 702: The OLT 110 instructs the first ONU 120 to obtain the intensity information of the echo signal of the upstream test optical signal through the second downstream optical signal.

The second downstream optical signal carries indication information that instructs the first ONU 120 to obtain the intensity information of the echo optical signal, and/or time information for the first ONU 120 to obtain the intensity information of the echo optical signal. Wherein, acquiring the intensity information of the echo optical signal by the first ONU 120 may specifically refer to that the first ONU 120 measures the received echo optical signal to obtain the intensity information of the echo optical signal, or may mean that the first ONU 120 receives and connects to the first ONU 120. The intensity information of the echo optical signal sent by the test equipment of an ONU 120. The test equipment is used to connect to the ONU120 and obtain the intensity information of the echo optical signal received by the ONU120, which can be specifically OTDR equipment, optical power meters, and other equipment. Test Equipment

The time information for acquiring the intensity information of the echo optical signal may indicate the time at which the first ONU 120 starts measuring the echo optical signal (for example, the time delay relative to the time when the first ONU 120 receives the second downstream optical signal), Or, the test equipment corresponding to the first ONU 120 may be instructed to start measuring the time of the echo optical signal. For example, the OLT 110 may obtain the round-trip time (Round Time Trip, RTT) or equivalent delay (Equalization Delay, Eqd) of the first ONU 120 before step 701, and determine the first ONU 120 according to the RTT and/or Eqd of the first ONU 120 The time delay of the echo optical signal is measured. The time delay may refer to the time difference from when the first ONU 120 starts to send the upstream test optical signal to when the first ONU starts to measure the echo optical signal. The method for the OLT 110 to obtain the RTT and/or Eqd of the first ONU 120 can refer to the existing standard technology (such as ITU-T G.984.3), which is not described in detail in the embodiments of the present application.

Further, the time information for acquiring the intensity information of the echo optical signal may also indicate the duration of measuring the echo optical signal of the first ONU 120, which may be referred to as the measurement duration. The measurement duration indicates the length of time or the amount of data for the first ONU 120 or the test equipment corresponding to the first ONU 120 to measure the echo optical signal. The length of time refers to the length of time for the first ONU 120 or the testing device to continuously test the echo optical signal, for example, 3 seconds. The amount of data refers to the number of times the echo optical signal is measured, such as once in the first second of the start of the test, once in the second second, and so on.

Further, the second downstream optical signal may also carry the type of acquired intensity information of the echo optical signal, such as the power of the echo optical signal, the reflection curve of the echo optical signal, and so on.

Wherein, the time information, or type, etc., of the acquired intensity information of the echo optical signal may be referred to as test parameters.

It should be understood that there is no time limit for step 702 and step 701. Wherein, the second downstream optical signal and the first downstream optical signal may be the same optical signal, that is, step 702 and step 701 are performed simultaneously.

Step 703: The first ONU 120 sends an upstream test optical signal according to the instruction of the OLT 110.

If the first downstream optical signal includes time information for sending the upstream test optical signal, the first ONU 120 starts to send the upstream test optical signal when it determines that the time for sending the upstream test optical signal arrives. Further, the first ONU 120 may also send the uplink test optical signal according to the end time or duration of sending the uplink test optical signal carried in the first downlink optical signal. The manner of sending the upstream test optical signal may also be configured in the first downstream optical signal, such as sending one or more short pulses, or sending long pulses, etc., and the pulse width may also be the first downstream optical signal. Configured in the signal. The strength of the uplink test optical signal may also be configured in the first downlink optical signal, for example, the average optical power of the uplink test optical signal is 0 dBm.

It should be understood that if the first downstream optical signal does not include the time information, the manner of sending the upstream test optical signal, or the strength of the upstream test optical signal, the first ONU 120 may be based on a preset time, manner, or strength. To send the upstream test optical signal. For example, the first ONU 120 immediately starts to send the upstream test optical signal after receiving the first downstream optical signal.

The wavelength of the uplink test optical signal may be the same as or different from the wavelength of the uplink service optical signal.

Step 704: The first ONU 120 obtains the intensity information of the echo optical signal of the upstream test optical signal according to the instruction of the OLT 110.

If the second downstream optical signal includes time information for acquiring the intensity information of the echo optical signal, the first ONU 120 or the test equipment corresponding to the first ONU 120 measures the echo optical signal according to the time information.

If the second downstream optical signal includes the type of the acquired intensity information of the echo optical signal, the first ONU 120 or the test equipment corresponding to the first ONU 120 measures the echo optical signal according to the type to obtain measurement data of the corresponding type.

It should be understood that if the first downstream optical signal does not include the time information, the first ONU 120 or the test equipment corresponding to the first ONU 120 may measure the echo optical signal at a preset time. The first ONU 120 or the test equipment corresponding to the first ONU 120 may also start measuring the echo optical signal immediately after receiving the echo optical signal. The same is true for the type of the intensity information of the acquired echo optical signal, for example, the measurement and data collection are performed according to a preset reflection curve.

Step 705: The OLT 110 instructs the first ONU 120 to report the acquired measurement result through the fourth downstream optical signal.

The fourth downstream optical signal may carry indication information instructing the first ONU 120 to report the intensity information of the echo optical signal, and/or time information for the first ONU 120 to report the intensity information of the echo signal.

It should be understood that step 702 and step 705 can be performed at the same time. Wherein, the second downstream optical signal and the fourth downstream optical signal may be the same optical signal. In addition, step 701, step 702, and step 705 may also be performed at the same time, and the first downstream optical signal, the second downstream optical signal and the fourth downstream optical signal may be the same optical signal.

Step 706: The first ONU 120 reports the measurement result to the OLT 110.

The measurement result may be the intensity information of the echo optical signal obtained by the first ONU 120. As an optional manner, the intensity information of the echo optical signal acquired by the first ONU 120 may include a reflection curve of the echo optical signal. It should be understood that the reflection curve reported by the first ONU 120 may be continuous or discrete. The first ONU 120 can report the entire acquired reflection curve; it can also report the curve segment where the event (reflection event, attenuation event, etc.) is located, such as the height and distance of the reflection peak corresponding to the reflection event, the attenuation value corresponding to the attenuation event, and distance. As an optional manner, the intensity information of the echo optical signal acquired by the first ONU 120 may also include information such as the average optical power of the echo optical signal.

The measurement result may also carry one or a combination of the following: the identification of the first ONU 120, the first ONU 120 or the OTDR corresponding to the first ONU 120 to measure the time information of the echo optical signal, and the uplink test sent by the first ONU 120 The intensity of the optical signal, the sending mode, the pulse width, or the time information for reporting the measurement result, etc.

Step 707: The OLT 110 determines the information of the first port of the first ONU 120 according to the intensity information of the echo optical signal reported by the first ONU 120. Wherein, the first port of the first ONU 120 refers to the port of the final-stage optical splitter to which the first ONU 120 is connected.

The intensity information of the echo optical signal corresponds to the information of the first port of the first ONU 120. Therefore, the OLT 110 compares the intensity information of the echo optical signal and the intensity information of the echo optical signal with the first ONU 120 The correspondence between the information of one port can determine the information of the first port of the first ONU 120.

The echo optical signal includes the first part of the optical signal reflected by the reflector provided at the first port of the first ONU 120 in the upstream test optical signal. The correspondence between the intensity information of the echo optical signal and the information of the first port is based on the correspondence between the reflectivity of the reflector and the information of the first port. The last-stage optical splitter may adopt the structure of the optical splitter 300-1 or the optical splitter 300-2, so that the port information of the last-stage optical splitter corresponds to the reflectivity of the reflector at the port, for details, please refer to FIG. 3A or FIG. 3B In the description of the embodiment. It should be understood that the reflector here may be a first reflector, and the first part of the optical signal is reflected by the first reflector; the reflector here may also be a second reflector and/or a third reflector , The first part of the optical signal is reflected by the second reflector and/or the third reflector.

Wherein, the intensity information of the echo optical signal reported by the first ONU 120 has a corresponding relationship with the reflectivity of the first port of the first ONU 120. The greater the reflectivity of the first port, the greater the intensity of the echo optical signal. The reflectivity of the first port can be regarded as the reflectivity of the reflector provided at the first port. Ignore the reflections caused by mechanical connections (such as fiber optic connectors). Further according to the correspondence between the intensity information of the echo optical signal and the reflectivity of the reflector set at the first port, and the relationship between the reflectivity of the reflector and the information of the first port where the reflector is located The corresponding relationship between, and the corresponding relationship between the intensity information of the echo optical signal and the information of the first port can be determined.

Taking the structure of the last-stage optical splitter using the optical splitter 300-1 as an example for description, the second side port of the last-stage optical splitter is provided with a first reflector. Then, the intensity information of the echo optical signal reported by the first ONU 120 has a corresponding relationship with the reflectivity of the first reflector provided at the second side port (that is, the first port) of the last-stage optical splitter connected to the first ONU 120. It can be seen from the embodiment shown in FIG. 3A that the reflectivity of the first reflector has a corresponding relationship with the information of the first port where the first reflector is located. Therefore, the intensity information of the echo optical signal has a corresponding relationship with the information of the first port of the first ONU 120.

Specifically, based on the corresponding relationship between the reflectance of the reflector and the information of the first port, the empirical calculation formula and the theoretical calculation formula are further deduced to obtain the information of the first port and the echo optical signal. The corresponding relationship of the intensity information. Or the corresponding relationship between the information of the first port and the intensity information of the echo optical signal can also be obtained through testing.

For example, in the process of ODN 130 construction (for example, optical fiber link establishment), the staff can record the ODN topology (such as the connection relationship between the optical splitters, the port information of the optical splitters, etc.). Further, the staff can also test the ODN130, for example, connect an ONU120 or a test device to a port with known port information, so that the ONU120 or the test device sends an uplink test optical signal, receives an echo optical signal, and obtains the The intensity information of the echo optical signal. The intensity information of the echo optical signal and the information of the port to which the ONU 120 or the test equipment is connected can be stored in the OLT 110, the network management server 140, the ONU 120, and the like. It should be understood that, in this case, the correspondence between the information of the first port and the intensity information of the echo optical signal is also based on the correspondence between the reflectivity of the reflector and the information of the first port. As an optional manner, the OLT 110 stores the correspondence between the information of the different ports of the final-stage optical splitter and the intensity information of the echo optical signal. The OLT 110 can determine the corresponding first port information of the first ONU 120 according to the intensity information of the echo optical signal reported by the first ONU 120.

As an example, the intensity information of the echo optical signal includes event information in the reflection curve. The intensity information of the echo optical signal reported by the first ONU 120 includes the height of the first reflection peak in the reflection curve of the echo optical signal. The first reflection peak is the transmission of the upstream test optical signal sent by the first ONU 120 to the first reflection peak. The reflection peak formed by the first port of the final-stage optical splitter connected to the ONU 120 is formed by the first part of the optical signal reflected by the reflector provided at the first port in the upstream test optical signal. Therefore, the correspondence between the height of the first reflection peak and the information of the first port is based on the correspondence between the reflectivity of the reflector and the information of the first port. The height of the first reflection peak indicates the intensity of the first partial optical signal; the distance of the first reflection peak indicates the distance between the first ONU 120 and the reflector provided at the first port. In other words, the distance of the first reflection peak indicates the distance that the first part of the optical signal is transmitted from the reflector provided at the first port to the first ONU 120. It should be understood that the distance of the first reflection peak also indicates the distance that the upstream test optical signal is transmitted from the first ONU 120 to the reflector provided at the first port.

When the intensity information of the echo optical signal includes multiple reflection peaks, the distance of the reflection peaks can be used to determine which is the first reflection peak. Also because the upstream test optical signal passes through the final-stage optical splitter, an attenuation event will be formed, and the distance between the attenuation event caused by the final-stage optical splitter and the first reflection peak caused by the reflector set at the port of the final-stage optical splitter is very close. It is also possible to determine which is the first reflection peak based on the reflection peak closest to the attenuation event of the final spectroscope, or based on the difference between the distance between the first reflection peak and the attenuation event of the final spectroscope being less than a certain distance threshold. judgment.

The OLT 110 stores the correspondence between the information of the different ports of the final-stage optical splitter and the height of the first reflection peak in the reflection curve. The OLT 110 determines the information of the first port of the first ONU 110 according to the height of the first reflection peak and the correspondence between the height of the first reflection peak and the information of the first port.

As an optional manner, the OLT 110 stores the correspondence between the information of the different ports of the final-stage optical splitter and the reflectivity of the uplink test optical signal transmitted from the ports. The OLT 110 may determine the reflectivity of the uplink test optical signal according to the intensity information of the echo optical signal reported by the first ONU 120 and the strength of the uplink test optical signal sent by the first ONU 120 (for example, the reflectivity is the optical power of the echo optical signal and the uplink optical signal. The ratio of the optical power of the test optical signal), and then the information of the corresponding first port of the first ONU 120 is determined according to the reflectivity of the upstream test optical signal.

As an optional manner, the OLT 110 stores the correspondence between the information of the different ports of the final-stage optical splitter and the reflectance of the reflector at the port. The OLT 110 can determine the reflectivity of the echo optical signal received by the first ONU 120 relative to the uplink test optical signal sent by the first ONU 120, and then determine the reflectance of the reflector of the first port of the first ONU 120 according to the reflectivity of the uplink test optical signal. The information of the first port of the corresponding first ONU 120 is determined according to the reflectivity of the reflector of the first port, for example, determined according to an empirical calculation formula.

It should be understood that, among the above-mentioned multiple alternatives, the intensity information of the echo optical signal reported by the first ONU 120 has a corresponding relationship with the information of the first port of the first ONU 120, and the difference lies in how the OLT 110 uses the corresponding relationship to determine the port information. .

Step 708: The OLT 110 may further determine the connection relationship between the first ONU 120 and the optical fiber network.

The connection relationship between the first ONU 120 and the optical fiber network refers to the connection between the first ONU 120 and each level of optical splitter in the ODN 130, which may specifically include which port of the final optical splitter is connected to the first ONU 120, and the final optical splitter is connected To which port of the previous stage, or to which optical fiber link in the ODN 130 the first ONU 120 is connected.

In step 707, the OLT 110 determines the information of the first port of the first ONU 120. Optionally, the OLT 110 may further determine the connection relationship between the first ONU 120 and the ODN 130 in combination with the topology of the ODN 130. The OLT110 can store the topology of the ODN130. For example, during the construction of the ODN130, the staff can record the connection relationship of the optical splitters in the ODN130 and upload it to the OLT110, or after the construction of the ODN130 is completed, the ODN130 can be tested to Get its topology. It should be understood that when the ODN 130 only includes the first-stage optical splitter, that is, the final-stage optical splitter, the connection relationship of the first ONU 120 has been determined in step 707.

In addition, the OLT 110 can also determine the second port information of the previous-stage optical splitter connected to the last-stage optical splitter connected to the first ONU 120 according to the intensity information of the echo optical signal reported by the first ONU 120, thereby obtaining the connection relationship of the first ONU 120 . The method for the OLT 110 to determine the information of the second port is similar to the method for determining the information of the first port in step 707, which will not be described in detail here.

The following is a further description based on the example in step 707. The intensity information of the echo optical signal reported by the first ONU 120 also includes the height of the second reflection peak in the reflection curve of the echo optical signal, and the second reflection peak is the transmission of the upstream test optical signal sent by the first ONU 120 to the second reflection peak. The reflection peak formed by the second port of an ONU 120 is formed by the second part of the optical signal reflected by the reflector provided at the second port in the upstream test optical signal. The height of the second reflection peak indicates the intensity of the second partial optical signal; the distance of the second reflection peak indicates the distance between the first ONU 120 and the reflector provided at the second port. In other words, the distance of the second reflection peak indicates the distance that the second part of the optical signal is transmitted from the reflector provided at the second port to the first ONU 120. The distance of the second reflection peak also indicates the distance that the upstream test optical signal is transmitted from the first ONU 120 to the reflector provided at the second port.

For ease of description, the previous-stage optical splitter connected to the final-stage optical splitter is referred to as the first-stage optical splitter (that is, the ODN 130 includes a two-stage optical splitter as an example for description). At this time, the intensity information of the echo optical signal reported by the first ONU 120 includes at least two reflection peaks corresponding to the first reflection peak and the second reflection peak. It can be judged which is the second reflection peak by the distance of the second reflection peak being greater than the distance of the first reflection peak. In addition, it is also possible to determine which is the second reflection peak based on the reflection peak closest to the attenuation event of the first-stage optical splitter, or based on the difference between the distance of the second reflection peak and the distance of the first-stage optical splitter's attenuation event is less than a certain The distance threshold is used to judge. The OLT 110 stores port information of different ports of the first-stage optical splitter and the reflection peak heights corresponding to the ports. The OLT 110 determines the corresponding second port information of the first ONU 120 according to the height of the second reflection peak. Further, the OLT 110 determines the connection relationship between the first ONU 120 and the ODN 130 according to the information of the first port of the first ONU 120 and the information of the second port.

It should be noted that the OLT 110 may first determine the information of the second port, and then determine the information of the first port, which is not limited in the embodiment of the present application.

It should be understood that when the ODN 130 adopts multi-level light splitting (for example, three-level light splitting), the OLT 110 may use a similar method to determine the port information of the first ONU connected to each level of optical splitter. In addition, in the embodiment of the present application, the front-stage optical splitter of the final-stage optical splitter may all adopt the structure of the optical splitter 300-1 or 300-2, or may be an optical splitter without a reflector.

In step 709, the OLT 110 and other ONUs 120 repeat steps 701-708 to determine the topology of the PON.

The OLT 110 determines the identity of the first ONU 120 that will send the uplink test optical signal next time, and carries the determined identity of the first ONU 120 in the instruction information of step 701. The OLT 110 may select (for example, select randomly or in other ways) the ONU 120 that has not sent the upstream test optical signal as the first ONU 120. For example, the OLT 110 can identify the ONU 120 that has sent the upstream test optical signal. Therefore, the OLT 110 can determine the first ONU 120 that sends the upstream test optical signal next time from the ONUs 120 that have not sent the upstream test optical signal. Furthermore, the OLT 110 and the determined first ONU 120 repeat steps 701 to 708 until the topological structure of the PON is determined.

Specifically, the OLT110 can determine which port of the last-stage optical splitter each ONU120 connected to the ODN130 is connected to, that is, the information of the first port of each ONU120; the OLT110 can also determine that each last-stage optical splitter in the ODN130 is connected to the previous Which port in the graded optical splitter, that is, the information of the second port of each ONU 120, determines the connection relationship between each ONU 120 and the ODN 130, that is, determines the topological structure of the PON.

As an alternative, steps 707-709 may not be executed first, and steps 709' and 710' may be executed. That is, repeating 701-706. After receiving the intensity of the respective echo optical signal sent by each ONU120, the OLT110 determines the information of the first port and the second port of each ONU120, and then determines the topological structure of the PON. For the method, refer to the description of steps 707-709.

Optionally, in this case, the OLT 110 may configure each ONU 120 through the first downstream optical signal in step 701, that is, the first downstream optical signal includes the instruction information for each ONU 120 to send the upstream test optical signal (for example, The identification of each ONU 120 that sends the upstream test optical signal, the time when each ONU 120 sends the upstream test optical signal), and the indication information for each ONU 120 to obtain the intensity information of the echo optical signal (e.g., the time delay and duration of measuring the intensity information of the echo optical signal) , And/or quantity), etc. For details, please refer to steps 701, 702, 705, etc., which will not be described in detail here.

Optionally, in this case, the OLT 110 may determine the ONU 120 connected to the same final optical splitter, and then determine that the final optical splitter is connected to the previous one according to the intensity information of the echo optical signal of the ONU 120 connected to the same final optical splitter. Which port of the optical splitter.

Still taking the first ONU 120 as an example for description. For ease of quotation, among all ONUs 120 managed by the OLT 110 in this application, the ONUs 120 other than the first ONU 120 are referred to as the second ONU 120. And the ONU 120 connected to the same final-stage optical splitter with the first ONU 120 is simply referred to as the third ONU 120. The OLT 110 determines the third ONU 120 according to the intensity information of the echo optical signal of the second ONU 120 and the intensity information of the echo optical signal of the first ONU 120. It should be understood that the echo optical signal of the second ONU 120 refers to the echo optical signal generated by the upstream test optical signal sent by the second ONU 120; the echo optical signal of the first ONU 120 refers to the echo generated by the upstream test optical signal sent by the first ONU 120 Wave light signal. The OLT 110 determines the information of the third ONU 120 and the second port of the first ONU 120 according to the intensity information of the echo optical signal of the third ONU 120 and/or the intensity information of the echo optical signal of the first ONU 120

As an example, the intensity information of the echo optical signal includes information about events in the reflection curve. The intensity information of the echo optical signal of the second ONU 120 includes the height and distance of the first reflection peak, and the height and distance of the second reflection peak, and the same is true for the echo optical signal of the first ONU 120. The difference between the distance between the first reflection peak and the second reflection peak is referred to as the first distance difference, and the first distance difference represents the distance between the reflector set by the last-stage optical splitter and the previous-stage optical splitter of the last-stage optical splitter. The distance between the reflectors. The first distance difference of the echo optical signal of the ONU 120 connected to the same final optical splitter is very close, so the OLT 110 can determine the first distance difference of the echo optical signal of the third ONU 120 and the first distance of the echo optical signal of the first ONU 120. The difference between the distance differences is less than the distance threshold. The height of the second reflection peak is related to the reflectivity of the reflector set in the previous-stage optical splitter connected to the final-stage optical splitter, so the height of the second reflection peak of the echo optical signal of the ONU120 of the same final-stage optical splitter is very close Therefore, the OLT 110 can determine that the difference between the height of the second reflection peak of the echo optical signal of the third ONU 120 and the height of the second reflection peak of the echo optical signal of the first ONU 120 is less than the height threshold.

The following takes a 2-level ODN130 as an example. FIG. 8A shows a schematic diagram of the reflection curves of the echo optical signals of three ONUs 120. Taking the curve 101 (solid line) as an example for description, 101-1 is the first reflection peak, and 101-2 is the second reflection peak. Among them, the distance between 101-1 and 101-2 is ΔL101, that is, the first distance difference mentioned above, which represents the second-stage optical splitter 132 and the first-stage optical splitter connected to the ONU 120 corresponding to the curve 101 The distance between 131 is the length of the distribution fiber 134. The curve 102 (dashed line) and the curve 103 (dotted line) are also similar, and will not be repeated here. ΔL101=6.01km, ΔL102=6km, ΔL101 is very close to ΔL102, that is, the difference between ΔL101 and ΔL102 is 0.01km less than the distance threshold 0.1km, so it can be determined that the ONU120 corresponding to curve 101 and the ONU120 corresponding to curve 102 are connected to the same first Secondary beam splitter 132. And ΔL103=8km, the difference between ΔL103 and ΔL101, ΔL102 is greater than the distance threshold 0.1km, so it can be determined that the ONU120 corresponding to curve 103 and the ONU120 corresponding to

curves

101 and 102 are not connected to the same second-stage optical splitter 132. In addition, the judgment can also be made by comparing the height of the second reflection peak, which will not be repeated here.

Further, the OLT 110 determines the information of the second port of the first ONU 120 according to the height of the second reflection peak of the echo optical signal of the third ONU 120 and the first ONU 120, which is also the information of the second port of the third ONU 120. For example, the OLT 110 determines according to the average value of the height of the second reflection peak of the echo optical signal of the third ONU 120 and the first ONU 120, and the stored correspondence between the height of the second reflection peak and the information of the second port. For details, refer to the description of step 708. Or the OLT 110 may also remove the maximum value and the minimum value of the height of the second reflection peak in the third ONU 120 and the first ONU 120, and then take the average value, which will not be repeated here.

Since the distance between the ONU120 and the reflector of the previous-stage optical splitter connected to the final-stage optical splitter is relatively long, the transmission distance of the upstream test optical signal and the echo optical signal is relatively long, so it is greatly affected by factors such as noise. The height of the reflection peak has a large error. The information of the second port is determined according to the intensity information of the echo optical signals of the multiple ONUs 120 connected to the same final optical splitter, which can reduce errors and make the determined information of the second port more accurate.

As an optional manner, in this embodiment of the present application, steps 705-709 may not be executed, but steps 711-714 may be executed.

Step 711: The first ONU 120 determines the port of the final-stage optical splitter to which the first ONU 120 is connected according to the acquired intensity information of the echo optical signal.

Step 712: The first ONU 120 further determines the connection relationship between the first ONU 120 and the optical fiber network. The first ONU 120 may also determine the information of the second port of the first ONU 120 according to the acquired intensity information of the echo optical signal.

Steps 711-712 are similar to those described in steps 707-708, except that the execution subject is changed from the OLT 110 to the first ONU 120, which will not be detailed here.

Step 713: The first ONU 120 sends a third upstream optical signal to the OLT 110 to report the connection relationship between the first ONU 120 and the optical fiber network.

The first ONU 120 sends the third upstream optical signal to the OLT 110. The third upstream optical signal may carry one or a combination of the following: information about the first port of the first ONU 120, information about the second port of the first ONU 120, and information about the optical fiber link in the ODN 130 connected to the first ONU 120 ID, or ID of the first ONU 120.

In step 714, the OLT 110 and other ONUs 120 repeat steps 701-704 and 711-713 until the topology of the PON is determined.

For details, refer to the description of step 709. In addition, in this case, the OLT110 can receive the information of which port of the last-stage optical splitter reported by each ONU120 of the ODN130, that is, the first port of each ONU120; the OLT110 can also receive the connection of each last-stage optical splitter in the ODN130 Information about which port in the previous-stage optical splitter, that is, the second port of each ONU 120. Further, the OLT 110 can determine the connection relationship between each ONU 120 and the ODN 130, that is, determine the topological structure of the PON.

As an optional manner, steps 707-709 or step 714 are not executed by the OLT 110, but are executed by the network management server 140 that is communicatively connected with the OLT 110. After the OLT 110 receives the intensity information of the echo optical signal reported by the first ONU 120, it sends the intensity information of the echo optical signal to the network management server 140. The network management server 140 then sends the information of the echo optical signal reported by the first ONU 120 to the network management server 140. The intensity information determines the information of the first port of the first ONU 120, and can also determine the information of the second port of the last-stage optical splitter. In addition, the network management server 140 or the OLT 110 determines the identity of the ONU that sends the upstream test optical signal. Further, the network management server 140 may determine the connection relationship between each ONU 120 and the ODN 130, that is, determine the topological structure of the PON. For details, please refer to the aforementioned steps, which will not be described in detail here.

In addition, the OLT 110 may also send the received intensity information to the network management server 140 after receiving the intensity information of the echo optical signal reported by each ONU 120, which is not limited in this application.

As an optional manner, steps 708, 709, 712, 713, and 714 may not be performed in this embodiment of the present application, that is, steps 708, 709, 712, 713, or 714 are optional.

As an example, the ODN 130 includes a 2-stage optical splitter, the optical splitter adopts the optical splitter 300-1 structure, and the optical splitting ratio of each stage optical splitter is 1×4 (that is, N is 4). The length of the backbone fiber in ODN130, the port number of the first-stage optical splitter 131 (information of the second port), the reflectance of the reflector at each port of the first-stage optical splitter 131 (the reflectance of the reflector of the second port) , The length of the distributed fiber, the port number of the second-stage optical splitter 132 (information of the first port), the length of the branch fiber, and the reflectance of the reflector at each port of the second-stage optical splitter 131 (the reflector of the first port) The reflectivity) is shown in Table 2.

Table 2. Information of Level 2 1×16ODN130 System

It should be understood that the port information here is a simple example and does not limit the application.

The OLT 110 stores the information of the first port and the corresponding first reflection peak height and first reflection peak distance, and the information of the second port and the corresponding second reflection peak height and second reflection peak distance, as shown in Table 3. Among them, the pulse width of the upstream test optical signal corresponding to this table is 10 ns.

Table 3. Correspondence between port information and reflection peak

It should be understood that the OLT 110 may obtain the information of the foregoing Table 2 and Table 3 through a test before executing the embodiment of the present application, that is, before step 701. In addition, the OLT 110 can also derive the corresponding reflection peak height based on the reflectivity of the reflector at each port of the optical splitter to obtain the information in Table 3. For example, according to the following formula to derive:

Among them, H is the reflection peak height of the echo optical signal, RV is the reflectivity of the reflector at the port, Bns is the optical fiber characteristic value (a certain constant), and D is the pulse width of the upstream test optical signal. It should be understood that whether Table 3 is obtained through testing or is further calculated according to Table 2, the correspondence between the height of the first reflection peak in Table 3 and the information of the first port is based on the first port in Table 2. The corresponding relationship between the reflectivity of the reflector and the information of the first port. Similarly, the correspondence between the height of the second reflection peak and the information of the second port in Table 3 is also based on the correspondence between the reflectivity of the reflector of the second port and the information of the second port in Table 2.

In step 701, the OLT 110 authorizes any ONU (such as ONU1) as the first ONU 120 to send an upstream test optical signal through the first downstream optical signal, and instructs the pulse width of the upstream test optical signal to be 10 ns. In step 702, the OLT 110 informs the ONU 1 to measure the intensity of the echo optical signal of the upstream test optical signal. In step 703, the ONU1 sends an uplink test optical signal, and the average optical power of the uplink test optical signal is 0 dBm, the pulse width is 10 ns, and the transmission frequency is once per millisecond.

In step 704, the ONU1 measures the intensity of the echo signal of the upstream test optical signal according to the instruction. Optionally, the ONU1 may perform repeated measurements according to the transmission frequency to improve sensitivity. The measured reflection curve of ONU1 is shown in Figure 8B. The upstream test optical signal is transmitted to the port of the second-stage optical splitter through the branch fiber 135, and the first part of the optical signal is reflected by the first reflector at the port, thereby forming the first reflection peak in the reflection curve. The height of a reflection peak is about 18.2 dB, and the distance of the first reflection peak is about 1.9 km. Then, the remaining upstream test optical signal passes through the second-stage optical splitter. Due to the attenuation characteristics of the optical splitter, the first attenuation event in the reflection curve is formed. The height of the first attenuation event is about 7dB. The distance is about 1.9km. The attenuated upstream test optical signal is transmitted to the port of the first-stage optical splitter through the distribution fiber 134, and a second part of the optical signal is reflected by the second reflector at the port, thereby forming the second reflection peak in the reflection curve The height of the second reflection peak is about 15dB, and the distance of the second reflection peak is about 8km. The upstream test optical signal passing through the second reflector continues to transmit, and then passes through the first-stage optical splitter to form a second attenuation event in the reflection curve. The height of the second attenuation event is about 7dB, and the first attenuation event The distance is about 8km.

It should be understood that, in the embodiments of the present application, the distance between the first attenuation event and the first reflection peak is taken as an example for description, and the distance difference may also be within a certain distance threshold range. For example, the OTDR test sensitivity is very high, and the test distance The accuracy can reach centimeters; or the first-stage reflector is an external reflector, and there is a distance between the first-stage beam splitter, and so on. The relationship between the second attenuation event and the distance of the second reflection peak is also the same, and will not be repeated here.

In step 706, the ONU1 reports the measurement result to the OLT 110 according to the instruction. The ONU1 can report the reflection curve, and the OLT 110 obtains the reflection curve shown in FIG. 8B. In steps 707-708, the OLT 110 can judge the events in the reflection curve. The distance of the first reflection peak is equal to the distance of the first attenuation event, the distance of the second reflection peak is equal to the distance of the second reflection peak, and the distance of the first reflection peak is equal to the distance of the second reflection peak. The distance of the peak is smaller than the distance of the second reflection peak. Therefore, the OLT 110 determines that the first reflection peak is caused by the first reflector of the second-stage optical splitter, and the second reflection peak is caused by the second reflector of the first-stage optical splitter. The OLT 110 may determine the information of the first port of the second-stage optical splitter connected to the ONU1 according to the measurement result reported by the ONU1. Specifically, the OLT 110 looks up Table 3 according to the 18.2dB height of the first reflection peak, and it can be obtained that the ONU1 is connected to the third port of the second-stage optical splitter. It should be understood that the difference between the measured 18.2dB and the 18dB recorded in Table 3 is 0.2dB, which may be caused by other reflections or noise in the optical path. When the OLT 110 compares the reflection peak data of the measured reflection curve with the stored reflection peak data, the error within the threshold range is allowed between the two. The threshold range may be preset in the OLT 110, or may be a default value, for example, 0.5 dB.

The OLT 110 may further determine the connection relationship between the ONU1 and the ODN 130. As an optional manner, if the OLT 110 has stored the topology structure of the ODN 130, the OLT 110 determines the connection relationship of the ONU 1 according to the stored topology structure and the determined first port information. For example, if the ONUs in the street where ONU1 is located are all connected to the first port of the first-stage optical splitter, the information of the second port of ONU1 is B1. Furthermore, the OLT 110 can determine that the ONU1 is connected to the B13 port of the ODN 130 according to the first port of the ONU1 connected to the first-stage optical splitter and the third port of the ONU1 connected to the second-stage optical splitter. As an optional manner, the OLT 110 may also determine the information of the second port connected to the ONU1 according to the measurement result reported by the ONU1, and then determine the connection relationship of the ONU1 according to the information of the second port of the ONU1 and the information of the first port. Specifically, the OLT 110 looks up Table 3 according to the height of the second reflection peak 15 dB, and can obtain the information of the second port of the ONU 1 as B1. Furthermore, the OLT 110 can determine that the ONU 1 is connected to the B13 port of the ODN 130.

In addition, the OLT 110 may also determine the above-mentioned information according to the distance of the first reflection peak and the distance of the second reflection peak. In addition, the OLT 110 may first determine the information of the second port of the ONU1, and then further determine the information of the first port of the ONU1, which is not limited in the embodiment of the present application.

1.1.1.1. FIG. 9 is a method for identifying an ONU connection port provided by an embodiment of the application, which is applied to a passive optical network system or an active optical network system. In the embodiment provided in FIG. 7, the ONUi 120 sends the upstream test optical signal under the instruction of the OLT 110, and then the ONUi 120 measures and reports the intensity of the echo optical signal of the upstream test optical signal, and the OLT 110 is based on the intensity of the echo optical signal. Determine the information of the first port of ONUi. In the embodiment shown in Figure 9, the ONUi 120 sends the upstream test optical signal under the instruction of the OLT 110, and all ONUs 120 managed by the OLT 110 measure and report the intensity of the echo optical signal of the upstream test optical signal. The OLT 110 is based on the The intensity of the echo optical signal sent by all ONUs 120 is determined by the fourth ONU 120 connected to the same final sub-splitter with ONUi 120, and then according to the intensity information of the echo optical signal sent by the fourth ONU 120 and the echo optical signal sent by ONUi 120 The signal strength information determines the information of the first port of the ONUi. With reference to FIG. 1 to FIG. 6B, the method provided by the embodiment of the present application includes:

Step 901: The OLT 110 instructs the first ONU 120 (that is, ONUi) to send an upstream test optical signal through the first downstream optical signal.

The content of step 901 is similar to that of step 701, and will not be repeated here.

Step 902: The OLT 110 instructs the first ONU 120 and the second ONU 120 to obtain the intensity information of the echo signal of the upstream test optical signal through the third downstream optical signal.

For ease of quotation, the echo optical signal of the upstream test optical signal sent by the first ONU 120 is referred to as the echo optical signal of the first ONU 120. Hereinafter, the echo optical signal without special description refers to the echo optical signal of the first ONU 120.

The second downstream optical signal carries instruction information that instructs each ONU 120 (first ONU 120 and second ONU 120) to obtain the intensity information of the echo optical signal, and/or each ONU 120 obtains the intensity information of the echo optical signal Time information. Wherein, that each ONU 120 obtains the intensity information of the echo optical signal may specifically refer to that each ONU 120 measures the received echo optical signal to obtain the intensity information of the echo optical signal, or may refer to that each ONU 120 receives the intensity information of the echo optical signal. Strength information of the echo optical signal sent by the test equipment connected to itself.

The time information for acquiring the echo optical signal may indicate the time (for example, time delay) when each ONU 120 starts measuring the echo optical signal, or may indicate the time when the test equipment corresponding to each ONU 120 measures the echo optical signal. The measurement time of each ONU 120 or the test equipment corresponding to each ONU 120 to the echo optical signal of the first ONU 120 may be the same or different.

Further, the time information for acquiring the intensity information of the echo optical signal may also indicate the duration of measuring the echo optical signal of the first ONU 120, which may be abbreviated as the measurement duration; the third downstream optical signal may also carry the acquired echo optical signal. The type of signal strength information, such as the power of the echo optical signal, the reflection curve of the echo optical signal, etc. For specific content, please refer to the content described in step 702, which will not be repeated here.

It should be understood that step 902 and step 901 are not limited in time sequence. Wherein, the third downstream optical signal and the first downstream optical signal may be the same optical signal, that is, step 902 and step 901 are performed at the same time.

The content of step 903 is similar to that of step 703, and will not be repeated here.

Step 904: The first ONU 120 and the second ONU 120 obtain the strength information of the echo signal of the uplink test optical signal sent by the first ONU 120 according to the instruction of the OLT 110.

If the third downstream optical signal includes time information for acquiring the intensity information of the echo optical signal, each ONU 120 or the test equipment corresponding to each ONU 120 measures the echo optical signal of the first ONU 120 according to the time information.

If the third downstream optical signal includes the type of the acquired intensity information of the echo optical signal, each ONU 120 or the test equipment corresponding to each ONU 120 measures the echo optical signal of the first ONU 120 according to the type to obtain a corresponding type of measurement data.

It should be understood that if the first downstream optical signal does not include the time information, each ONU 120 or the test equipment corresponding to each ONU 120 may also start measuring the echo light immediately after receiving the echo optical signal of the first ONU 120 signal. The same is true for the type of the intensity information of the acquired echo optical signal, for example, the measurement and data collection are performed according to a preset reflection curve.

Step 905: The OLT 110 instructs the first ONU 120 and the second ONU 120 to report the acquired measurement results through the fifth downstream optical signal.

The fifth downstream optical signal may carry indication information that instructs each ONU 120 to report intensity information of the echo optical signal of the first ONU 120, and/or time information reported by each ONU 120.

It should be understood that step 902 and step 905 can be performed at the same time. Wherein, the third downstream optical signal and the fifth downstream optical signal may be the same optical signal. In addition, step 901, step 902, and step 905 may also be performed at the same time, and the first downstream optical signal, the third downstream optical signal and the fifth downstream optical signal may be the same optical signal.

Step 906: The first ONU 120 and the second ONU 120 report the measurement result to the OLT 110.

The measurement result may be the intensity information of the echo optical signal of the first ONU 120 acquired by each ONU 120. As an optional manner, the acquired intensity information of the echo optical signal may include a reflection curve of the echo optical signal. It should be understood that the reflection curve reported by each ONU 120 may be continuous or discrete. Each ONU120 can report the entire acquired reflection curve; it can also report the curve segment where the event (reflection event, attenuation event, etc.) is located, such as the height and distance of the reflection peak corresponding to the reflection event, and the attenuation value and distance corresponding to the attenuation event . In addition, part of the second ONU 120 may not report the measurement result. For example, the power value in the intensity information of the echo optical signal obtained by the part of the ONU 120 is lower than a certain preset threshold, or the height of no reflection peak in the reflection curve is greater than a certain threshold. Preset threshold. As an optional manner, the acquired intensity information of the echo optical signal may also include information such as the average optical power of the echo optical signal.

The measurement result may also carry one or a combination of the following: the identification of each ONU 120, the time information of each ONU 120 or the OTDR corresponding to each ONU 120 measuring the echo optical signal of the first ONU 120, etc., so that the OLT 110 can determine each ONU 120. The intensity information of the echo optical signal of the first ONU 120 sent by the ONU 120.

Step 907: The OLT 110 determines the ONU 120 connected to the same final sub-splitter with the first ONU 120 according to the intensity information of the echo optical signal of the first ONU 120 reported by the second ONU 120. The second ONU 120 connected to the same final sub-splitter with the first ONU 120 may be referred to as the fourth ONU 120 for short.

It should be noted that the last-stage optical splitter in the embodiment of the present application adopts the structure of the optical splitter 300-2, and the last-stage sub-splitter refers to the last-stage sub-splitter in the last-stage optical splitter 300-2, for example, as shown in FIG. 3B. SZ1, SZ2,... SZY,... SZP are shown, wherein the splitting ratio of the final sub-splitter is 1×Q or 2×Q, and Q is an integer greater than 1, for example, Q is 2. For the specific structure, refer to the description of the embodiment shown in FIG. 3B.

For the uplink test optical signal sent by the first ONU 120, the echo optical signal received by the first ONU 120 includes the optical signal reflected by the third reflector of the final sub-splitter in the uplink test optical signal, and the optical signal reflected by the final sub-splitter. The optical signal reflected by the second reflector of the sub-spectroscope; and the echo optical signal received by the fourth ONU 120 includes the optical signal reflected by the upstream test optical signal by the second reflector of the last-stage sub-spectroscope; and the second The echo optical signal received by the ONU 120 other than the fourth ONU 120 in the ONU 120 does not include the optical signal reflected by the second reflector or the third reflector of the final sub-splitter.

As an optional manner, the OLT 110 stores the threshold value of the intensity difference of the echo optical signals sent by the ONU 120 connected to the same final sub-splitter, which may be simply referred to as the intensity difference threshold of the ONU 120 of the same group. The OLT 110 determines that the difference between the intensity information of the echo optical signal of the first ONU 120 sent by the fourth ONU 120 and the intensity information of its own echo optical signal sent by the first ONU 120 is less than the intensity difference threshold. For example, the OLT 110 determines that the difference between the average power of the echo optical signal sent by the first ONU 120 and the average power of the echo optical signal sent by the first ONU 120 is smaller than the intensity difference threshold of the same group of ONUs 120 (here specifically, the average power difference threshold). Then the ONUh120 can be determined as the ONU 120 in the same group as the first ONU 120, that is, the fourth ONU 120.

As an optional manner, the OLT 110 determines that the intensity information of the echo optical signal of the first ONU 120 sent by the fourth ONU 120 is the intensity information of the echo optical signal of the first ONU 120 sent by the second ONU 120 with the highest intensity. The maximum intensity here can specifically refer to the instantaneous amplitude, instantaneous power, or maximum average power of the echo optical signal; it can also refer to the maximum height of the reflection peak of the reflection curve, or the maximum number of reflection peaks reaching a certain height threshold. For example, the average power of the echo optical signal sent by the ONUj120 is -40dB, while the average power of the echo optical signal sent by the other second ONU120 is lower than -55dB. Therefore, the OLT110 determines that the intensity of the echo optical signal sent by the ONUj120 is in the second ONU120. The largest, ONUj120 can be determined as the fourth ONU120.

It should be noted that the ONU 120 with the highest intensity may refer to one ONU 120 with the highest intensity, or may refer to multiple ONUs 120 with the highest intensity. Specifically, a sub-final optical splitter is connected to Q ONUs 120, one of which is the first ONU 120, then the ONU 120 with the highest intensity at this time refers to the (Q-1) ONU 120 with the highest intensity.

As an optional manner, the OLT 110 determines that the intensity information of the echo optical signal of the first ONU 120 sent by the fourth ONU 120 includes the first reflection peak, and the distance between the first reflection peak sent by the fourth ONU 120 and the first ONU 120 The difference between the distances of the transmitted first reflection peaks is less than the distance threshold. The port of the final-stage optical splitter to which the first ONU 120 is connected is called the first port. Then the distance of the first reflection peak sent by the fourth ONU 120 indicates the distance between the fourth ONU 120 and the reflector provided on the first port, and the distance of the first reflection peak sent by the first ONU indicates the distance between the fourth ONU 120 and the reflector provided on the first port. The distance between the first ONU 120 and the reflector provided at the first port.

Step 908: The OLT 110 determines the information of the first port of the first ONU 120 according to the intensity information of the echo optical signal of the first ONU 120 reported by the fourth ONU 120 and the intensity information of its own echo optical signal reported by the first ONU 120.

As an optional manner, the OLT 110 determines which final sub-splitter is connected to the first ONU 120 according to the intensity information of the echo optical signal reported by the fourth ONU 120 and/or the intensity information of the echo optical signal reported by the first ONU 120. It is called the identification of the final sub-splitter. The intensity information of the echo optical signal reported by the fourth ONU 120 and the intensity information of the echo optical signal reported by the first ONU 120 have a corresponding relationship with the identifier of the final sub-splitter.

Optionally, the OLT 110 stores the correspondence between the identifiers of different final sub-splitters and the intensity information of the echo optical signal. The OLT 110 can determine the identifier of the final sub-splitter connected to the first ONU 120 according to the intensity information of the echo optical signal reported by the fourth ONU 120 and/or the intensity information of the echo optical signal reported by the first ONU 120, and the corresponding relationship. Before step 901, the OLT 110 may acquire and store the correspondence between the identifier of the final sub-spectroscope and the intensity information of the echo optical signal. Since there is a correspondence between the identifier of the final sub-splitter and the reflectivity of the second reflector of the final sub-splitter (for details, see the description of the embodiment in FIG. 3B), the uplink test optical signal transmitted by the first ONU 120 is transmitted When reaching the second reflector, part of the optical signal is reflected by the second reflector to form the echo optical signal, and the intensity information of the echo optical signal has a corresponding relationship with the reflectivity of the second reflector, and then Based on the correspondence between the identifier of the final sub-spectroscope and the reflectivity of the second reflector, the correspondence between the identifier of the final sub-spectroscope and the intensity information of the echo optical signal can be obtained relationship. Specifically, the correspondence relationship between the last-stage sub-spectroscope identifier and the intensity information of the echo optical signal can be obtained by further derivation of empirical calculation formulas and theoretical calculation formulas or by testing.

Optionally, the OLT 110 stores the correspondence between the identifier of the final sub-splitter and the reflectivity of the uplink test optical signal transmitted from the final sub-splitter. Or the OLT 110 stores the corresponding relationship between the identifier of the final sub-splitter and the reflectivity of the second reflector of the final sub-splitter. The specific content is similar to the description in step 707. You can refer to step 707, which will not be repeated here. Go into details.

It should be noted that the OLT 110 can determine the identification of the final sub-splitter connected to the first ONU 120 according to the intensity information of the echo optical signal reported by one of the fourth ONUs 120, or according to the echo optical signal reported by the first ONU 120 itself. The intensity information can be determined, or it can be determined according to the intensity information of the echo optical signals reported by the fourth ONU 120 and the first ONU 120, for example, according to the average value of the intensity information of the echo optical signals reported by the fourth ONU 120 and the first ONU 120.

Further, the OLT 110 determines which port of the final sub-splitter the first ONU 120 is connected to, and combined with the determined identifier of the final sub-splitter, the OLT 110 can determine the information of the first port of the first ONU 120.

Optionally, when Q is 2, that is, the number of the fourth ONU 120 is 1, the OLT 110 can determine the intensity by comparing the intensity information of the echo optical signal sent by the first ONU 120 with the intensity information of the echo optical signal sent by the fourth ONU 120 Which port of the final sub-splitter is connected to the first ONU 120. For example, the OLT 110 determines that the intensity information of the echo optical signal sent by the fourth ONU 120 is less than the intensity information of the echo optical signal sent by the first ONU 120, thereby determining that the fourth side port of the final sub-splitter connected to the first ONU 120 is provided with a third reflection. The fourth side port of the final sub-splitter connected to the fourth ONU 120 is a port without a third reflector.

It should be understood that if the fourth port of the final sub-splitter connected to the first ONU 120 is not provided with a third reflector, the intensity information of the echo optical signals reported by the first ONU 120 and the fourth ONU 120 are almost equal. At this time, the OLT 110 can determine whether the fourth side port of the final sub-splitter connected to the first ONU 120 is not provided with the third reflector according to the difference in the intensity of the echo optical signal reported by the first ONU 120 and the fourth ONU 120 is less than the intensity difference threshold. The fourth side port of the final sub-splitter connected to the fourth ONU 120 is the port where the third reflector is provided.

Optionally, when Q is greater than 2, each of the Q fourth side ports on the fourth side of the final sub-splitter is provided with a third reflector, and the reflectivity of the third reflector is equal to that of the fourth side port. The port information of the port has a corresponding relationship. The OLT 110 may sort the intensity information of the echo optical signals sent by the fourth ONU 120 and the first ONU 120, and then determine that the first ONU 120 is connected to the corresponding relationship between the reflectivity of the third reflector and the port information of the fourth side port Which port of the final sub-splitter. For example, if the average power of the echo optical signal sent by the first ONU 120 is the lowest, the OLT 110 determines that the fourth side port of the final sub-splitter connected to the first ONU 120 is the port with the lowest reflectance of the third reflector. The OLT 110 can also obtain the corresponding relationship between the intensity information of the echo optical signal and the port information of the fourth side port according to the corresponding relationship between the reflectivity of the third reflector and the port information of the fourth side port, and then according to the corresponding relationship sent by the first ONU 120 The intensity information of the echo optical signal and the corresponding relationship between the intensity information of the echo optical signal and the port information of the fourth side port determine which port of the final sub-splitter to which the first ONU 120 is connected.

As an optional manner, the OLT 110 determines the information of the first port of the last-stage optical splitter port to which the first ONU 120 is connected according to the strength information of the echo optical signal reported by the fourth ONU 120 and the first ONU 120, that is, the optical splitter 300- Port information of the second side port of 2. Optionally, the OLT 110 stores the correspondence between the port information of the second side port of the optical splitter 300-2 and the intensity information of the echo optical signal. For details, refer to the description of the embodiment shown in FIG. 3B.

Optionally, when Q is 2, and one of the two fourth side ports of the final sub-splitter is provided with a third reflector, the other is not provided with a third reflector. Then the OLT 110 can determine whether the fourth side port of the final sub-splitter connected to the first ONU 120 is set by comparing the intensity information of the echo optical signal sent by the first ONU 120 with the intensity information of the echo optical signal sent by the fourth ONU 120. The third reflector.

If the intensity information of the echo optical signal reported by the first ONU 120 is greater than the intensity information of the echo optical signal sent by the fourth ONU 120, it means that the fourth side port connected to the first ONU 120 is provided with a third reflector, and the OLT 110 transmits according to the first ONU 120 The corresponding relationship between the intensity information of the echo optical signal and the port information of the second side port and the intensity information of the echo optical signal determines the port information of the second side port connected to the first ONU 120, that is, the port information of the first ONU 120 Information about the first port. Then the OLT 110 may further determine the information of the first port of the fourth ONU 120.

If the intensity information of the echo optical signal reported by the first ONU 120 is less than or equal to the intensity information of the echo optical signal sent by the fourth ONU 120, it means that the fourth side port connected to the first ONU 120 is not equipped with a third reflector, and the OLT 110 temporarily The port information to which the first ONU 120 is connected cannot be determined. The OLT 110 determines that the ONU 120 sending the upstream test optical signal is the fourth ONU 120, and then repeats steps 901-906. The OLT 110 receives the intensity information of the echo optical signal of the upstream test optical signal of the fourth ONU 120 reported by the fourth ONU 120, and according to the first The intensity information of the echo optical signal of the fourth ONU 120 reported by the fourth ONU 120 determines the port information of the second side port to which the fourth ONU 120 is connected, that is, the information of the first port of the fourth ONU 120, thereby further determining the first port of the first ONU 120 Information.

Optionally, when Q is 2 or Q is greater than 2, and each fourth side port of the final sub-splitter is provided with a third reflector. Then the OLT 110 determines the port of the second side port connected to the first ONU 120 according to the intensity information of its own echo optical signal reported by the first ONU 120 and the correspondence between the port information of the second side port and the intensity information of the echo optical signal. information. At this time, the specific method is similar to that described in step 707, and will not be repeated here. The OLT 110 may further determine the port information of the second side port to which the fourth ONU 120 is connected, and the determination method is similar to the method for determining the first ONU 120.

Step 909: The OLT 110 may further determine the connection relationship between the first ONU 120 and the optical fiber network.

Step 909 is similar to step 708, and the specific content can be referred to step 708, etc., which will not be repeated here.

For ease of quotation, the following takes a 2-stage optical splitter as an example for description. The multi-stage optical splitter ODN130 system is also similar. Therefore, the previous stage optical splitter of the last stage optical splitter is simply referred to as the first stage optical splitter. If the first-stage optical splitter adopts the optical splitter 300-2 shown in FIG. 3B, the OLT first determines the multiple ONUs 120 connected to the final sub-splitter of the same first-stage optical splitter, and then according to the multiple ONUs 120 sent The intensity information of the echo optical signal of the first ONU 120 determines the information of the second port of the first-stage optical splitter to which the multiple ONUs 120 are connected, and further determines the connection relationship between the multiple ONUs 120 and the optical fiber network. For specific content, please refer to steps 907 and 908, which will not be repeated here.

In step 910, the OLT 110 and other ONUs 120 repeat steps 901-909 to determine the PON topology.

The OLT 110 determines the identity of the first ONU 120 that sends the upstream test optical signal next time, and determines the topology of the PON. The specific method is similar to that described in step 709, and you can refer to step 709, which will not be repeated here. In addition, the OLT 110 may also select the fourth ONU 120 as the first ONU 120 to send the upstream test optical signal next time; or the OLT 110 may also select the ONU 120 whose connection relationship has not been determined as the first ONU 120 to send the upstream test optical signal next time.

As an alternative, steps 907-909 may not be executed first, and steps 910' and 911' may be executed. That is to repeat 901-906, that is, after receiving the intensity information of the echo optical signal of the upstream test optical signal sent by all ONUs 120, the OLT 110 determines the information of the first port and the second port of each ONU 120, and then determines the PON Topology. Optionally, in this case, the OLT 110 may configure each ONU 120 through the first downstream optical signal in step 901, that is, the first downstream optical signal includes the instruction information for each ONU 120 to send the upstream test optical signal (for example, The identification of each ONU 120 that sends the upstream test optical signal, the time when each ONU 120 sends the upstream test optical signal), and the indication information for each ONU 120 to obtain the intensity information of the echo optical signal (e.g., the time delay and duration of measuring the intensity information of the echo optical signal) , And/or quantity), etc. For details, please refer to steps 901, 902, 905, etc., which will not be described in detail here.

As an optional way, steps 907-909 and 911' are not executed by the OLT 110, but executed by the network management server 140 connected in communication with the OLT 110. After receiving the intensity information of the echo optical signal reported by each ONU 120, the OLT 110 sends the intensity information of the echo optical signal to the network management server 140, and the network management server 140 determines that the first ONU 120 is connected to the same final sub-splitter The fourth ONU120; determine which port of the last-stage optical splitter is connected to the first ONU120, that is, the information of the first port; and also determine which port of the previous-stage optical splitter is connected to the last-stage optical splitter, that is, the second Port information. In addition, the network management server 140 or the OLT 110 determines the identity of the ONU that sends the upstream test optical signal. Further, the network management server 140 may determine the connection relationship between each ONU 120 and the ODN 130, that is, determine the topological structure of the PON. For details, please refer to the aforementioned steps, which will not be described in detail here.

In addition, the OLT 110 may also send the received intensity information to the network management server 140 after receiving the intensity information of the echo optical signal for the uplink test optical signals sent by all ONUs, which is not limited in this application.

As an example, in the embodiment corresponding to FIG. 9, ODN130 includes a 2-stage optical splitter, the first-stage optical splitter 131 has a splitting ratio of 1×2, and the second-stage optical splitter 132-1, 132-2 (that is, the final stage The splitting ratio of the optical splitter is 1×4, and the second-stage optical splitter 300-2 structure is adopted. FIG. 10 is a schematic diagram of a PON system provided by an embodiment of the application. Among them, the topological structure of the ODN130 is known. For example, the second-stage optical splitter 132-1 is connected to the B1 port of the first-stage optical splitter 131, and the second-stage optical splitter 132-2 is connected to the B2 of the first-stage optical splitter 131. port. The connection between the ONU and the ODN 130 is still unknown, and the connection between each ONU and the ODN 130 has been marked in FIG. 10 to make the method and structure of the embodiment of the present application clearer. The port number of the second-stage optical splitter 132 in the ODN130 (information of the first port), the last-stage sub-splitter identification of the second-stage optical splitter 132, and the second reflector of the second-stage optical splitter 132 (sub-splitter S21, The information of the reflector provided on the floating third side port of S22), the information of the third reflector of the second-stage optical splitter 132 (the reflector provided on the fourth side port of the sub-splitters S21 and S22), such as Table 4 shows.

Table 4. Information of the second stage splitter 132 in ODN130

The OLT 110 stores the identification of the final sub-splitter and the intensity of the corresponding echo optical signal, as shown in Table 5. Among them, the intensity of the uplink test optical signal corresponding to this table is 0dBm, and the loss of the branch fiber is assumed to be about 3dB.

Table 5. Correspondence between port information and the intensity of the echo optical signal

It should be understood that the OLT 110 may obtain the information in the foregoing Table 4 and Table 5 through methods such as testing, calculation derivation, or manual recording before executing the embodiment of the present application, that is, before step 901.

In step 901, the OLT 110 authorizes any ONU (such as ONU 4) as the first ONU 120 to send an upstream test optical signal through the first downstream optical signal, and the first downstream optical signal is configured with the strength of the upstream test optical signal (Average optical power) is 0dBm. In step 902, the OLT 110 notifies each ONU (ONU 1-8 in this example) to measure the intensity of the echo optical signal of the upstream test optical signal. In step 903, the ONU 4 transmits an uplink test optical signal, and the average optical power of the uplink test optical signal is 0 dBm, the pulse width is 1 ns, and the transmission frequency is once per millisecond.

When the uplink test optical signal sent by the ONU4 fills the backbone and distribution fibers, the ONU1-ONU8 or the corresponding test equipment measures the intensity of the echo optical signal of the uplink test optical signal according to the measurement time information in step 902. For example, ONU1-ONU8 or corresponding test equipment can measure the echo optical signal of ONU4 one or more times according to the time information in the third downstream optical signal, and then ONU1-ONU8 can obtain the measured intensity of the echo optical signal. As an example, if each ONU or OTDR is measured for multiple times, the intensity of the multiple measurements can be averaged, and the average value is used as the intensity value of the echo optical signal of the upstream test optical signal.

The upstream test optical signal sent by the ONU4 is transmitted to the third reflector R32 through the branch fiber 135. The third part of the upstream test optical signal is reflected by the third reflector R32 and returns to the ONU4; the remaining upstream test optical signal passes through After the sub-splitter S22, a fourth part of the optical signal is reflected by the second reflector R22. The fourth part of the optical signal passes through the sub-splitter S22 and is divided into the fifth part of the optical signal transmitted to the ONU4 and the optical signal transmitted to the ONU3. The sixth part of the optical signal. Therefore, the echo optical signal received by the ONU 4 includes the third part of the optical signal, the fifth part of the optical signal, and the optical signal reflected by other reflection points (such as the sub-splitter S11, the optical splitter 131), and the Rayleigh scattered optical signal. Wait. The echo optical signal received by the ONU 3 includes the sixth part of the optical signal and the optical signal reflected by other reflection points (such as the sub-splitter S11 and the optical splitter 131), the Rayleigh scattered optical signal, and the like. The optical signals received by ONU1 and ONU2 only include optical signals reflected by other reflection points (such as sub-splitter S11 and optical splitter 131), Rayleigh scattered optical signals, and so on. The optical signals received by the ONU5-ONU8 only include optical signals reflected by other reflection points (such as the optical splitter 131), Rayleigh scattered optical signals, and so on.

Therefore, the intensity of the echo optical signal measured by the fourth ONU (i.e. ONU3) of the same final sub-splitter (i.e. S22) connected to the first ONU (i.e. ONU4) that sends the upstream test optical signal is greater than that of the first ONU connected to the first ONU. The intensity of the echo optical signal measured by other ONUs of different final sub-splitters.

In step 906, each ONU (such as ONU1-ONU8) reports the measurement result of the echo optical signal of the first ONU to the OLT 110. The intensity distribution of the echo optical signal of the ONU 4 measured by each ONU obtained by the OLT 110 is shown in FIG. 11. In step 907, the OLT110 determines that the fourth ONU connected to the same final sub-splitter as the first ONU is ONU3, and the intensity of the echo optical signal of the first ONU120 sent by ONU3 is that of the second ONU120 (that is, ONU1-ONU3, ONU5-ONU8). The intensity of the echo optical signal sent in) is the strongest. Therefore, the OLT 110 determines that ONU3 and ONU4 are connected to the same final sub-splitter. In addition, the OLT 110 may also determine that the third ONU connected to the same second-stage optical splitter with the first ONU is ONU1-ONU3.

In step 908, the OLT 110 may determine the identification of the final sub-splitter connected to the ONU3 and the ONU4 according to the intensity of the echo optical signal of the ONU4 measured by the ONU3. For example, the echo optical signal intensity measured by the OLT 110 according to the ONU 3 in FIG. 11 is -42 dB. Look up Table 5 to determine that the identifier of the final sub-splitter connected to the ONU 3 and the ONU 4 is S22. Furthermore, by comparing the magnitude of the echo optical signal intensity measured by ONU3 and ONU4, it is determined which port of the final subdivision optical device S22 the ONU3 and ONU4 are connected to. For example, according to the echo optical signal strength measured by ONU3 -42dB is less than the echo optical signal strength measured by ONU4 -36dB, it is determined that the port of the final sub-splitter connected to ONU4 is provided with a third reflector. Then the OLT 110 can determine that the ONU 4 is connected to the fourth port of the second-stage optical splitter, and the ONU 3 is connected to the third port of the second-stage optical splitter. Further, in step 909, the OLT 110 may also determine the connection relationship between the ONU 4, the ONU 3 and the ODN 130, and the specific method will not be repeated here.

FIG. 12 is a method for determining ONU connection provided by an embodiment of this application, which is applied to a passive optical network system or an active optical network system. In the embodiment shown in FIG. 12, similar to the embodiment shown in FIG. 9, the ONUi 120 sends the upstream test optical signal under the instruction of the OLT 110, and then all the ONUs 120 in the ODN130 measure and report the echo optical signal of the upstream test optical signal. Strength of. The difference from the embodiment shown in FIG. 9 is that the OLT 110 determines the third ONU 120 connected to the same final-stage optical splitter with the ONUi 120 based on the intensity of the echo optical signals sent by all the ONUs 120, and then transmits according to the third ONU 120. The intensity information of the echo optical signal and the intensity information of the echo optical signal sent by the ONUi 120 determine the information of the second port of the previous-stage optical splitter to which the last-stage optical splitter of the ONUi is connected. In addition, the method for determining the information of the first port of the final-stage optical splitter connected to the ONUi is similar to the embodiment shown in FIG. 7 and FIG. 9. With reference to FIG. 1 to FIG. 6B, the method provided by the embodiment of the present application includes:

Steps 1201-1206 are similar to steps 901-906, and will not be repeated here.

For the specific content of step 1207, refer to step 907 or step 707, which will not be repeated here.

Step 1208: The OLT 110 determines the third ONU 120 connected to the same final-stage optical splitter with the first ONU 120 according to the intensity information of the echo optical signal of the first ONU 120 reported by the second ONU 120.

It should be noted that the various levels of optical splitters in the embodiments of the present application can adopt the structure of the optical splitter 300-1 or 300-2. The following takes the optical splitter 300-1 as an example for description, and the optical splitter 300-2 is also similar. .

For the upstream test optical signal sent by the first ONU 120, the echo optical signal received by the first ONU 120 includes the first part of the optical signal reflected by the reflector of the last-stage optical splitter in the upstream test optical signal, and the first part of the optical signal reflected by the last-stage optical splitter. The second part of the optical signal reflected by the reflector of the previous-stage optical splitter; the echo optical signal received by the third ONU 120 includes the second part of the upstream test optical signal reflected by the reflector of the previous-stage optical splitter Optical signal; the echo optical signal received by other ONUs 120 in the second ONU 120 except the third ONU 120 does not include the first partial optical signal and the second partial optical signal.

As an optional manner, the OLT 110 determines that the difference between the intensity information of the echo optical signal of the first ONU 120 sent by the third ONU 120 and the intensity information of its own echo optical signal sent by the first ONU 120 is less than the first intensity difference threshold. The first intensity difference threshold may be preset (for example, obtained through a test), or may be determined according to the reflectivity of the last-stage optical splitter.

As an optional manner, the OLT 110 determines that the difference between the intensity information of the echo optical signal of the first ONU 120 sent by the third ONU 120 and the intensity information of the echo optical signal sent by other ONUs in the second ONU 120 is greater than the second intensity difference threshold. The second intensity difference threshold may be preset (for example, obtained through a test), or may be determined according to the reflectivity of the previous-stage optical splitter of the final stage optical splitter.

As an optional manner, the OLT 110 determines that the intensity information of the echo optical signal of the first ONU 120 sent by the third ONU 120 is the intensity information of the echo optical signal of the first ONU 120 sent by the second ONU 120 with the highest intensity. Refer to the description of step 907 for the maximum intensity here.

As an optional manner, the OLT 110 determines that the intensity information of the echo optical signal of the first ONU 120 sent by the third ONU 120 includes the second reflection peak, and the distance between the second reflection peak sent by the third ONU 120 and the first ONU 120 The difference between the distances of the transmitted second reflection peaks is less than the distance threshold. The second reflection peak is formed based on the second part of the optical signal reflected by the reflector provided at the second port in the upstream test optical signal sent by the first ONU 120. The distance of the second reflection peak sent by the third ONU 120 indicates the distance between the third ONU 120 and the reflector provided at the second port. The distance of the second reflection peak sent by the first ONU 120 indicates the distance between the first ONU 120 and the reflector provided at the second port.

Step 1209: The OLT 110 may further determine the connection relationship between the first ONU 120 and the optical fiber network.

For specific content, refer to step 708 and step 909.

Here, an optional method for determining the information of the second port of the first ONU 120 is introduced. It should be understood that the information of the second port of the first ONU 120 and the third ONU 120 is the same.

As an optional manner, the OLT 110 determines the information of the second port according to the intensity information of the echo optical signal of the first ONU 120 sent by the third ONU 120. For example, the intensity information of the echo optical signal includes the average power of the echo optical signal, the OLT 110 sends the average power of the echo optical signal according to the average power of the multiple third ONUs 120, and the stored information of the second port and the corresponding The average power of the echo optical signal is determined. Or the OLT 110 may also determine the reflectivity of the uplink test optical signal according to the average power of the echo optical signal sent by the plurality of third ONUs 120 and the average power of the uplink test optical signal, and then according to the stored second port The information and the reflectivity of the corresponding upstream test optical signal are determined and so on. The specific content is similar to step 708, please refer to step 708.

As an optional manner, the OLT 110 determines the information of the second port according to the third ONU 120 and the intensity information of the echo optical signal of the first ONU 120 sent by the first ONU 120. For example, the intensity information of the echo optical signal includes the height of the second reflection peak. The OLT 110 determines according to the average value of the height of the second reflection peak sent by the third ONU 120 and the first ONU 120, and the stored information of the second port and the height of the corresponding second reflection peak. In addition, the OLT 110 may also determine the reflectivity of the upstream test optical signal according to the average value of the height of the second reflection peak sent by the third ONU 120 and the first ONU 120, and then determine the information of the second port and so on. For details, please refer to steps 708 and 710'.

The information of the second port is determined according to the intensity information of the echo optical signals of multiple ONUs 120 connected to the same final-stage optical splitter, which can reduce errors. For details, refer to the description of step 710'.

Steps 1210, 1210', and 1011' are similar to steps 910, 910', and 911', and will not be repeated here.

As an optional manner, steps 1207-1209 and 1011' are not executed by the OLT 110, but executed by the network management server 140 that is in communication with the OLT 110. After the OLT 110 receives the intensity information of the echo optical signal of each ONU 120 reported by each ONU 120, it sends the intensity information of the echo optical signal to the network management server 140, and the network management server 140 can then according to the intensity information of the echo optical signal Determine which port of the last-stage optical splitter the first ONU 120 is connected to, that is, the information of the first port of the first ONU 120; the network management server 140 may also determine the third ONU 120 that is connected to the same last-stage optical splitter with the first ONU 120; network management The server 140 may also determine to which port of the previous-stage optical splitter the last-stage optical splitter is connected, that is, information about the second port of the first ONU 120. In addition, the network management server 140 or the OLT 110 determines the identity of the ONU that sends the upstream test optical signal. Further, the network management server 140 may determine the connection relationship between each ONU 120 and the ODN 130, that is, determine the topological structure of the PON. For details, please refer to the aforementioned steps, which will not be described in detail here.

In addition, the OLT 110 may also send the received intensity information to the network management server 140 after receiving the intensity information of the echo optical signal of the upstream test optical signal sent by all ONUs, which is not limited in this application.

FIG. 13 is a schematic structural diagram of a device provided by this application. The OLT 110, the ONU 120 or the network management server 140 in this application can also be implemented by the device in FIG. 13.

The device includes one or more processors 1301. The processor 1301 may also be referred to as a processing unit, which may implement certain control functions. The processor 601 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of this application .

As an optional manner, the processor 1301 may also store instructions 1304, and the instructions 1304 may be executed by the processor 1301, so that the device executes the instructions corresponding to the OLT 110, the ONU 120, or the network management server 140 described in the foregoing method embodiments. method.

As an optional manner, the device may further include one or more memories 1302. The memory 1302 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact Disc Read-Only Memory, CD-ROM) or other optical disc storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this.

The memory 1302 may store an instruction 1305, and the instruction 1305 may be executed on the processor 1301, so that the device executes the method corresponding to the OLT 110, the ONU 120 or the network management server 140 described in the foregoing method embodiment. The memory 1302 may also store data, such as the intensity information of the echo optical signal obtained by the ONU 120 and so on. The memory 1302 may exist independently and is connected to the processor 1301 through a bus. The memory 1302 may also be integrated with the processor 1301.

As an optional manner, the device may further include a transceiver 1303. The transceiver 1303 may also be referred to as a transceiver unit, or a transceiver circuit, etc., which can implement the function of transceiving optical signals. For details, refer to the description in the foregoing method embodiment.

This application also provides a readable storage medium for storing execution instructions used by the device (OLT 110, ONU 120, or network management server 140) shown in FIG. 13 above. The foregoing method can be implemented when the stored execution instruction is executed by at least one processor of the device.

This application also provides a program product. The program product includes an execution instruction, and the execution instruction can be stored in a readable medium. At least one processor of the device (OLT 110, ONU 120, or network management server 140) shown in FIG. 13 can read the execution instruction from the readable medium to implement the above method.

The present application also provides a system for determining ONU connection. The system includes an OLT 110, an ODN 130 and a plurality of ONUs 120, and the OLT 110 is connected to the plurality of ONUs 120 through the ODN 130. Among them, the OLT 110 can perform any steps performed by the OLT 110 in the foregoing embodiment; the ONU 120 can perform any steps performed by the ONU 120 in the foregoing embodiment. The last-stage optical splitter in ODN130 can be the optical splitter 300-1 or the optical splitter 300-2; as an optional way, each stage of the optical splitter in the ODN130 can be the optical splitter 300-1 or the optical splitter 300-2 . For specific content, please refer to the foregoing embodiment, which will not be repeated here.

This application also provides a system for determining ONU connection. The system includes a network management server 140 and a passive optical network PON system 100. The PON system 100 can send the intensity information of its own echo optical signal obtained by the first ONU 120 to the network. The management server 140, the network management server 140 may determine the information of the first port of the first ONU 120 according to the intensity information of its own echo optical signal of the first ONU 120, and the network management server 140 may further determine the connection relationship of the first ONU 120 in the ODN 130.

As an optional manner, the PON system 100 may also send the intensity information of the echo optical signal of the first ONU 120 obtained by the second ONU 120 to the network management server 140, and the network management server 140 may also use the information of the first ONU 120 of the second ONU 120. The intensity information of the echo optical signal determines the third ONU 120 connected to the same final-stage optical splitter as the first ONU 120. The network management server 140 may also determine the fourth ONU 120 connected to the same final sub-splitter with the first ONU 120 according to the intensity information of the echo optical signal of the first ONU 120 of the second ONU 120. For specific content, please refer to the foregoing embodiment, which will not be repeated here.

The various numerical numbers involved in the embodiments of the present application are only for easy distinction for description, and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the foregoing processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art may realize that the various illustrative logical blocks and steps described in the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. achieve. Whether these functions are performed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division, and there may be other divisions in actual implementation, for example, multiple modules or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or modules, and may be in electrical, mechanical or other forms.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for identifying an ONU connection port of an optical network unit, characterized in that it is applied to an ONU, and the method includes:

Sending the first upstream optical signal;

Receiving the echo optical signal generated by the first uplink optical signal in the optical fiber network;

Acquire the intensity information of the echo optical signal, and determine the information of the first port of the last-stage optical splitter connected to the ONU according to the intensity information of the echo optical signal, wherein the intensity information of the echo optical signal is the same as that of the There is a correspondence between the information of the first port.
The method according to claim 1, wherein the echo optical signal comprises the first part of the optical signal reflected by the reflector provided at the first port in the first upstream optical signal, and the echo optical signal is The correspondence between the intensity information and the information of the first port is based on the correspondence between the reflectivity of the reflector provided at the first port and the information of the first port.
The method according to claim 1 or 2, further comprising:

Sending a second upstream optical signal to an optical line terminal OLT, where the second upstream optical signal is used to request the OLT to authorize the ONU to send the first upstream optical signal.
The method according to any one of claims 1-3, further comprising:

Receiving a first downstream optical signal sent by the OLT, where the first downstream optical signal carries instruction information instructing the ONU to send the first upstream optical signal, and/or the ONU sends the first upstream optical signal Time information of the optical signal.
The method according to any one of claims 1-4, further comprising:

The connection relationship between the ONU and the optical fiber network is determined according to the information of the first port.
The method according to any one of claims 1-5, further comprising: sending a third upstream optical signal to the OLT, the third upstream optical signal carrying information of the first port or the ONU The connection relationship with the optical fiber network.
The method according to claim 4 or 6, further comprising: the first uplink optical signal and the second uplink optical signal have the same wavelength, or the first uplink optical signal and the third uplink optical signal have the same wavelength. The wavelength of the upstream optical signal is the same; or the first upstream optical signal is different from the second upstream optical signal, or the wavelength of the first upstream optical signal is different from the third upstream optical signal.
The method according to any one of claims 1-7, wherein the intensity information of the echo optical signal comprises the height of the first reflection peak in the reflection curve of the echo optical signal, and the first reflection peak is based on The first upstream optical signal is formed by the first part of the optical signal reflected by the reflector provided at the first port, and the height of the first reflection peak indicates the intensity of the first part of the optical signal,

The determining the information of the first port according to the intensity information of the echo optical signal includes:

The information of the first port is determined according to the height of the first reflection peak, wherein the correspondence between the height of the first reflection peak and the information of the first port is based on the reflection set by the first port The corresponding relationship between the reflectance of the device and the information of the first port.
8. The method according to claim 8, wherein the intensity information of the echo optical signal further comprises the height of a second reflection peak in the reflection curve of the echo optical signal, and the second reflection peak is based on the first reflection peak. An upstream optical signal is formed by the second part of the optical signal reflected by the reflector provided at the second port, the height of the second reflection peak indicates the intensity of the second part of the optical signal, and the distance of the second reflection peak Indicates the distance between the ONU and the reflector provided at the second port, the distance of the first reflection peak indicates the distance between the ONU and the reflector provided at the first port, and the second The distance of the reflection peak is greater than the distance of the first reflection peak,

The method also includes:

The information of the second port is determined according to the height of the second reflection peak, where the second port is the port of the previous-stage optical splitter connected to the last-stage optical splitter connected to the ONU, and the second reflection The correspondence between the height of the peak and the information of the second port is based on the correspondence between the reflectivity of the reflector set at the second port and the information of the second port;

The connection relationship between the ONU and the optical fiber network is determined according to the information of the first port and the information of the second port.
A method for identifying an ONU connection port of an optical network unit, characterized in that the method includes:

The device receives intensity information of the echo optical signal sent by the first optical network unit ONU, where the echo optical signal is the echo optical signal generated in the optical fiber network by the first upstream optical signal sent by the first ONU;

The device determines the information of the first port of the last-stage optical splitter connected to the first ONU according to the intensity information of the echo optical signal sent by the first ONU.
The method according to claim 10, wherein there is a correspondence between the intensity information of the echo optical signal sent by the first ONU and the information of the first port; and the echo optical signal includes the first port In an upstream optical signal, the first part of the optical signal reflected by the reflector set at the first port, and the corresponding relationship between the intensity information of the echo optical signal sent by the first ONU and the information of the first port is based on all The corresponding relationship between the reflectivity of the reflector provided at the first port and the information of the first port.
The method according to claim 10 or 11, further comprising:

The device determines the connection relationship between the first ONU and the optical fiber network according to the information of the first port.
The method according to any one of claims 10-12, wherein the intensity information of the echo optical signal sent by the first ONU includes the height of the first reflection peak in the reflection curve of the echo optical signal, and the second A reflection peak is formed based on the first part of the optical signal reflected by the reflector provided at the first port in the first upstream optical signal, and the height of the first reflection peak indicates the intensity of the first part of the optical signal,

The device determining the information of the first port according to the intensity information of the echo optical signal includes:

The device determines the information of the first port according to the height of the first reflection peak, wherein there is a correspondence between the height of the first reflection peak and the information of the first port, and the first reflection The correspondence between the height of the peak and the information of the first port is based on the correspondence between the reflectivity of the reflector provided at the first port and the information of the first port.
The method according to claim 13, wherein the intensity information of the echo optical signal sent by the first ONU further comprises the height of the second reflection peak in the reflection curve of the echo optical signal, and the second reflection peak It is formed based on the second part of the optical signal reflected by the reflector provided at the second port in the first upstream optical signal, and the height of the second reflection peak indicates the intensity of the second part of the optical signal. The distance between the two reflection peaks indicates the distance between the first ONU and the reflector provided at the second port, and the distance between the first reflection peak indicates the distance between the first ONU and the reflector provided at the first port The distance between the second reflection peak is greater than the distance between the first reflection peak,

The method also includes:

The device determines the information of the second port according to the height of the second reflection peak, where the second port is the port of the previous-stage optical splitter connected to the last-stage optical splitter connected to the first ONU, There is a correspondence between the height of the second reflection peak and the information of the second port, and the correspondence between the height of the second reflection peak and the information of the second port is based on the second port setting The corresponding relationship between the reflectivity of the reflector and the information of the second port;

The device determines the connection relationship between the first ONU and the optical fiber network according to the information of the first port and the information of the second port.
The method according to any one of claims 10-14, further comprising:

Receiving, by the device, intensity information of the echo optical signal sent by a second ONU, where the second ONU is an ONU other than the first ONU in the optical network system;

Determining, by the device, according to the intensity information of the echo optical signal sent by the second ONU, a third ONU that is connected to the same final-stage optical splitter as the first ONU;

The device determines the information of the second port according to the intensity information of the echo optical signal sent by the third ONU.
The method according to any one of claims 10-15, further comprising:

The device determines, according to the intensity information of the echo optical signal sent by the second ONU, a fourth ONU that is connected to the same final sub-splitter as the first ONU, and the final sub-splitter is the final sub-splitter The last sub-splitter in

The device determines the information of the first port according to the intensity information of the echo optical signal sent by the first ONU and the intensity information of the echo optical signal sent by the fourth ONU.
The method according to claim 16, further comprising: determining the information of the first port by the device, which specifically includes:

The device determines, according to the intensity information of the echo optical signal sent by the first ONU and/or the intensity information of the echo optical signal sent by the fourth ONU, the identifier of the corresponding final sub-splitter connected to the first ONU ；

Based on the identification of the last-stage sub-splitter connected to the first ONU, the device further determines the output signal according to the intensity information of the echo optical signal sent by the first ONU and the intensity information of the echo optical signal sent by the fourth ONU. Describe the information of the first port.
The method according to any one of claims 10-17, wherein the device is an optical line terminal OLT, and the method further comprises: the OLT sends a first downstream optical signal, and the first downstream optical signal The signal carries instruction information that instructs the first ONU to send the first upstream optical signal, and/or time information for the first ONU to send the first upstream optical signal.
The method according to claim 18, further comprising:

The OLT sends a second downstream optical signal, and the second downstream optical signal carries instruction information that instructs the first ONU to obtain the intensity information of the echo optical signal, and/or the first ONU obtains the echo optical signal Time information of signal strength information.
The method according to claim 18, further comprising: the OLT sending a third downstream optical signal, and the third downstream optical signal carries and instructs the first ONU and the second ONU to obtain the return The indication information of the intensity information of the wave optical signal, and/or the time information for the first ONU and the second ONU to obtain the intensity information of the echo optical signal.
The method according to any one of claims 10-17, wherein the device is a network management server.
An ONU of an optical network unit, which is characterized in that it comprises:

Uplink optical signal transmitter for sending the first uplink optical signal;

An echo optical signal receiver, configured to receive an echo optical signal generated by the first uplink optical signal in an optical fiber network;

The processing module is used to obtain the intensity information of the echo optical signal, and determine the information of the first port of the last-stage optical splitter connected to the ONU according to the intensity information of the echo optical signal, wherein the echo optical signal There is a corresponding relationship between the intensity information and the information of the first port.
The ONU according to claim 22, wherein the echo optical signal comprises a first part of the optical signal reflected by the reflector provided at the first port in the first upstream optical signal, and the echo optical signal is The correspondence between the intensity information and the information of the first port is based on the correspondence between the reflectivity of the reflector provided at the first port and the information of the first port.
The ONU according to claim 22 or 23, further comprising:

The upstream optical signal transmitter is further configured to send a second upstream optical signal to an optical line terminal OLT, and the second upstream optical signal is used to request the OLT to authorize the ONU to transmit the first upstream optical signal.
The ONU according to any one of claims 22-24, further comprising:

The downstream optical signal receiver is configured to receive a first downstream optical signal sent by the OLT, where the first downstream optical signal carries instruction information instructing the ONU to send the first upstream optical signal, and/or The ONU sends time information of the first upstream optical signal.
The ONU according to any one of claims 22-25, further comprising:

The processing module is further configured to determine the connection relationship between the ONU and the optical fiber network according to the information of the first port.
The ONU according to any one of claims 22-26, further comprising:

The upstream optical signal transmitter is further configured to send a third upstream optical signal to the OLT, where the third upstream optical signal carries the information of the first port or the connection relationship between the ONU and the optical fiber network.
The ONU according to any one of claims 22-27, wherein the wavelengths of the first upstream optical signal, the second upstream optical signal, the third upstream optical signal, and the echo optical signal are the same.
The ONU according to any one of claims 22-27, wherein the upstream optical signal transmitter comprises a first upstream optical signal transmitter and a second upstream optical signal transmitter, and the first upstream optical signal transmitter For sending the first upstream optical signal; the second upstream optical signal transmitter for sending the second upstream optical signal or the third upstream optical signal; the first upstream optical signal and the return Wavelength optical signals have the same wavelength; the first uplink optical signal, the second uplink optical signal, and the third uplink optical signal have different wavelengths.
The ONU according to any one of claims 22-29, wherein the intensity information of the echo optical signal comprises the height of a first reflection peak in the reflection curve of the echo optical signal, and the first reflection peak is based on The first upstream optical signal is formed by the first part of the optical signal reflected by the reflector provided at the first port, and the height of the first reflection peak indicates the intensity of the first part of the optical signal,

The processing module, configured to determine the information of the first port according to the intensity information of the echo optical signal, includes:

The processing module is configured to determine the information of the first port according to the height of the first reflection peak, wherein the correspondence between the height of the first reflection peak and the information of the first port is based on the information of the first port. The corresponding relationship between the reflectivity of the reflector provided at the first port and the information of the first port.
The ONU according to any one of claims 22-30, wherein the intensity information of the echo optical signal further comprises the height of a second reflection peak in the reflection curve of the echo optical signal, and the second reflection peak is It is formed based on the second part of the optical signal reflected by the reflector provided at the second port in the first upstream optical signal. The height of the second reflection peak indicates the intensity of the second part of the optical signal. The distance of the reflection peak indicates the distance between the ONU and the reflector provided at the second port, and the distance of the first reflection peak indicates the distance between the ONU and the reflector provided at the first port, The distance of the second reflection peak is greater than the distance of the first reflection peak;

The processing module is further configured to determine information about the second port according to the height of the second reflection peak, where the second port is the previous-stage optical splitter connected to the last-stage optical splitter connected to the ONU The corresponding relationship between the height of the second reflection peak and the information of the second port is based on the corresponding relationship between the reflectivity of the reflector set at the second port and the information of the second port ；

The processing module is further configured to determine the connection relationship between the ONU and the optical fiber network according to the information of the first port and the information of the second port.
A device for identifying an ONU connection port of an optical network unit, which is characterized in that it comprises:

A receiver, configured to receive intensity information of an echo optical signal sent by a first optical network unit ONU, where the echo optical signal is an echo optical signal generated in an optical fiber network by a first upstream optical signal sent by the first ONU;

The processing module is configured to determine the information of the first port of the last-stage optical splitter connected to the first ONU according to the intensity information of the echo optical signal sent by the first ONU.
The device according to claim 32, wherein there is a correspondence between the intensity information of the echo optical signal sent by the first ONU and the information of the first port; and the echo optical signal includes the first port In an upstream optical signal, the first part of the optical signal reflected by the reflector set at the first port, and the corresponding relationship between the intensity information of the echo optical signal sent by the first ONU and the information of the first port is based on all The corresponding relationship between the reflectivity of the reflector provided at the first port and the information of the first port.
The device according to claim 32 or 33, wherein the intensity information of the echo optical signal sent by the first ONU includes the height of the first reflection peak in the reflection curve of the echo optical signal, and the first reflection The peak is formed based on the first part of the optical signal reflected by the reflector provided at the first port in the first upstream optical signal, and the height of the first reflection peak indicates the intensity of the first part of the optical signal,

The processing module, configured to determine the information of the first port according to the intensity information of the echo optical signal, includes:

The processing module is configured to determine the information of the first port according to the height of the first reflection peak, wherein there is a correspondence between the height of the first reflection peak and the information of the first port, so The correspondence between the height of the first reflection peak and the information of the first port is based on the correspondence between the reflectivity of the reflector provided at the first port and the information of the first port.
The device according to claim 34, wherein the intensity information of the echo optical signal sent by the first ONU further comprises the height of the second reflection peak in the reflection curve of the echo optical signal, and the second reflection peak It is formed based on the second part of the optical signal reflected by the reflector provided at the second port in the first upstream optical signal, and the height of the second reflection peak indicates the intensity of the second part of the optical signal. The distance between the two reflection peaks indicates the distance between the first ONU and the reflector provided at the second port, and the distance between the first reflection peak indicates the distance between the first ONU and the reflector provided at the first port The distance between the second reflection peak is greater than the distance between the first reflection peak;

The processing module is further configured to determine information about the second port according to the height of the second reflection peak, where the second port is the previous stage connected to the last-stage optical splitter connected to the first ONU For the port of the optical splitter, there is a correspondence between the height of the second reflection peak and the information of the second port, and the correspondence between the height of the second reflection peak and the information of the second port is based on the corresponding relationship between the height of the second reflection peak and the information of the second port. The correspondence between the reflectivity of the reflector provided at the second port and the information of the second port;

The processing module is further configured to determine the connection relationship between the first ONU and the optical fiber network according to the information of the first port and the information of the second port.
The device according to any one of claims 32-35, further comprising:

The receiver is further configured to receive intensity information of the echo optical signal sent by a second ONU, where the second ONU is another ONU in the optical network system other than the first ONU;

The processing module is further configured to determine, according to the intensity information of the echo optical signal sent by the second ONU, a third ONU that is connected to the same final-stage optical splitter as the first ONU;

The processing module is further configured to determine the information of the second port according to the intensity information of the echo optical signal sent by the third ONU.
The device according to any one of claims 32-36, further comprising:

The processing module is further configured to determine, according to the intensity information of the echo optical signal sent by the second ONU, a fourth ONU that is connected to the same final sub-splitter as the first ONU, and the final sub-splitter is the final sub-splitter. The last sub-splitter in the sub-splitter;

The processing module is further configured to determine the information of the first port according to the intensity information of the echo optical signal sent by the first ONU and the intensity information of the echo optical signal sent by the fourth ONU.
The device according to any one of claims 32-37, wherein the device is an optical line terminal OLT, and the OLT further comprises: a downstream optical signal transmitter for sending a first downstream optical signal, the The first downstream optical signal carries instruction information that instructs the first ONU to send the first upstream optical signal, and/or time information for the first ONU to send the first upstream optical signal.
The device according to any one of claims 32-38, further comprising:

The downstream optical signal transmitter is further configured to send a third downstream optical signal, and the third downstream optical signal carries instruction information that instructs the first ONU and the second ONU to obtain the intensity information of the echo optical signal , And/or time information for the first ONU and the second ONU to acquire the intensity information of the echo optical signal.
The device according to any one of claims 32-37, wherein the device is a network management server.
A passive optical network system, characterized by comprising an optical line terminal OLT, an optical distribution network ODN, and a plurality of optical network unit ONUs, the OLT is connected to the plurality of ONUs through the ODN, and the plurality of ONUs At least one ONU in is the ONU according to any one of claims 22-31.
The system according to claim 41, wherein the ODN includes a final optical splitter, the final optical splitter includes a first side port and a second side port, wherein the first side port is used to connect For the first-stage optical splitter or the OLT, the second side port is used to connect the multiple ONUs;

The second side port connected to the at least one ONU is provided with a first reflector, and the port information of the second side port has a corresponding relationship with the reflectivity of the first reflector of the second side port;

And the second side port of the last-stage optical splitter to which the at least one ONU is connected is the first port of the at least one ONU.
A passive optical network system, characterized by comprising an optical line terminal OLT, an optical distribution network ODN, and a plurality of optical network unit ONUs, the OLT is connected to the plurality of ONUs through the ODN, and the OLT is a right Requires any of the equipment described in 32-39.
A communication system, characterized in that it includes a network management device, a passive optical network system,

The passive optical network system is configured to send to the network management device the intensity information of the echo optical signal generated in the optical fiber network by the first upstream optical signal obtained by the first ONU and/or the second ONU, the first ONU Is an ONU that sends the first upstream optical signal, and the second ONU is another ONU in the passive optical network system other than the first ONU;

The network management device is used to execute the method according to any one of claims 10-17.
An optical splitter that supports port identification. The optical splitter includes N second-side ports, and the second-side ports are used to connect a subsequent-stage optical splitter or ONU; among the N second-side ports, at least (N -1) The second side port is provided with a first reflector, and the port information of the second side port has a corresponding relationship with the reflectivity of the first reflector of the second side port, where N is greater than 1. Integer.
An optical splitter that supports port identification, the optical splitter that supports port identification includes N second-side ports; the second-side port is used to connect a subsequent-stage optical splitter or ONU, and N is an integer greater than 1; The optical splitter supporting port identification includes P final sub-splitters, the final sub-splitter being the last sub-splitter in the optical splitters that support port identification, and the final sub-splitter includes one Or 2 third-side ports and Q fourth-side ports, where the third-side port is used to connect the previous-stage sub-splitter or is suspended, and the fourth-side port of the last-stage sub-splitter is the support For the second side port of the optical splitter identified by the port, P is a positive integer, and Q is an integer greater than 1. One of the third side ports of each of the final sub-splitters is provided with a second reflector, and each At least Q-1 fourth side ports in the final sub-splitter are provided with a third reflector; wherein the identification of the final sub-splitter and the reflection of the second reflector of the final sub-splitter There is a corresponding relationship between the efficiency, or the identifier of the last-stage sub-splitter and the reflectance of the third reflector of the last-stage sub-splitter have a corresponding relationship.
The optical splitter that supports port identification according to claim 46, wherein the final sub-splitter includes two third-side ports, and one third-side port of the final sub-splitter is connected to the previous one. One-stage sub-splitter, the other third side port of the last-stage sub-splitter is suspended;

One of the third side ports of each of the final sub-splitters is provided with a second reflector, which specifically includes: the suspended third side port of each of the final sub-splitters is provided with the The second reflector.