Port identification method and device

Abstract

Disclosed are a port identification method and a device, relating to the technical field of optical communications. A service optical signal sent by an optical network central office device to an optical network unit is split into two different optical sub-signals, and the optical network unit can determine, on the basis of a port characteristic between the two different optical sub-signals, a port of an optical distribution network device to which the optical network unit is connected, avoiding the problem of low port identification efficiency caused by the need to manually scan QR codes, improving the efficiency of port identification. Moreover, since the port characteristic between different optical sub-signals is determined, the process of performing port identification by an optical network unit would not be affected by the degradation of QR codes or the improper operation of installation and maintenance personnel, improving the accuracy of port identification.

Description

Port identification method and device

[0001] The present application claims priority from the Chinese patent application No. 202410465597.0 filed on April 17, 2024, and entitled "A port identification method and device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of optical communication technology, and in particular to a port identification method and device. BACKGROUND

[0003] A passive optical network (PON) is an access network applied to optical fibers, and there is no electronic device powered by a power supply between an optical line terminal (OLT) and an optical network unit (ONU) in the PON. In the PON, the downlink transmission from the OLT to the ONU is in a broadcast mode, and the uplink transmission from the ONU to the OLT is in a time division multiple access (TDMA) mode. In order to effectively manage the PON, the OLT identifies the ports of different ONUs to realize the topology restoration of the PON.

[0004] Generally, when installing a new user ONU, a maintenance personnel of an optical distribution network (ODN) realizes port mapping by sequentially scanning the two-dimensional codes of each node in the ODN and manages the scanned port information through software. However, due to the fact that the nodes in the ODN are not concentrated in the physical location, the efficiency of manually scanning the ODN nodes is low; and moreover, affected by the aging of the two-dimensional codes and the non-standard operation of the maintenance personnel, the port identification accuracy of the OLT for the ODN nodes is low. SUMMARY

[0005] The present application provides a port identification method and device, which solves the problem of low port identification efficiency caused by manual scanning of two-dimensional codes, and also solves the problem of low port identification accuracy caused by the aging of the two-dimensional codes and the non-standard operation of the maintenance personnel.

[0006] The present application adopts the following technical solutions.

[0007] In a first aspect, the present application provides a port identification method. The port identification method is performed by an optical network unit, the optical network unit is connected to an optical network termination device through an optical distribution network device, and the port identification method comprises: the optical network unit receives a first sub-optical signal and a second sub-optical signal from the optical network termination device, the first sub-optical signal and the second sub-optical signal have a transmission time delay therebetween, and the first sub-optical signal and the second sub-optical signal carry the same service information; and the optical network unit determines port information of the optical distribution network device connected to the optical network unit according to the transmission time delay between the first sub-optical signal and the second sub-optical signal.

[0008] In the first aspect of the present application, the optical signal is transmitted between the optical network termination device and the optical network unit, the service optical signal sent by the optical network termination device to the optical network unit is split into two different sub-optical signals, and the optical network unit can determine the port information of the optical distribution network device connected to the optical network unit based on the transmission time delay between the two different sub-optical signals, thereby avoiding the problem of low port identification efficiency caused by manual scanning of the two-dimensional code, and facilitating improvement of the port identification efficiency. Moreover, since the transmission time delay between the different sub-optical signals carrying the same service information is determined, the process of port identification performed by the optical network unit is not affected by the aging of the two-dimensional code or the non-standard operation of the maintenance personnel, thereby facilitating improvement of the accuracy of port identification by the optical network unit.

[0009] In combination with the port identification method provided in the first aspect, in an optional implementation manner, the optical network unit determines the port information of the optical distribution network device connected to the optical network unit according to the transmission time delay between the first sub-optical signal and the second sub-optical signal, comprising: the optical network unit matches the transmission time delay with a port list to determine the port information of the optical distribution network device connected to the optical network unit. The port list comprises: a plurality of port characteristics of a plurality of output ports provided by the optical distribution network device, and one output port corresponds to one port characteristic.

[0010] In a feasible example, the optical network unit stores the port list.

[0011] In another feasible example, the optical network unit calls a configured application programming interface (API) to access the port list stored in the database.

[0012] In an optional implementation of the port identification method according to the first aspect, the port feature of the port information of the optical distribution network device to which the optical network unit is connected comprises one or a combination of the following: a transmission delay between the first sub-optical signal and the second sub-optical signal, an optical power difference between the first sub-optical signal and the second sub-optical signal, and a coded bit comprising a first bit value, the first bit value being determined according to the transmission delay between the first sub-optical signal and the second sub-optical signal.

[0013] The optical distribution network device in the port identification method according to the first aspect is further described below in combination with the second aspect.

[0014] According to the second aspect, the present application provides an optical distribution network device. The optical distribution network device comprises an input port, a processing module and a first output port. The input port is configured to receive a first service optical signal sent by an optical network terminal device. The processing module is configured to process the first service optical signal to obtain a first sub-optical signal and a second sub-optical signal, and send the first sub-optical signal and the second sub-optical signal to the first output port, the first service optical signal, the first sub-optical signal and the second sub-optical signal carrying the same service information. The output port is configured to output the first sub-optical signal and the second sub-optical signal.

[0015] In the second aspect of the present application, the service optical signal sent by the optical network terminal device to the optical network unit is split by the optical distribution network device into two sub-optical signals carrying the same service information, and the transmission delay between the two sub-optical signals is uniquely corresponding to the output port provided by the optical distribution network device, thereby avoiding the problem of low port identification efficiency caused by manual scanning of the two-dimensional code, and facilitating to improve the efficiency of port identification. Moreover, since the transmission delay between different sub-optical signals is determined, the process of port identification performed by the optical network unit is not affected by the aging of the two-dimensional code or the non-standard operation of the installation and maintenance personnel, thereby facilitating to improve the accuracy of port identification.

[0016] According to the service optical signal sent by the optical network terminal device to the optical network unit, for the service optical signal sent by the optical network unit to the optical network terminal device, the optical distribution network device splits the service optical signal into two sub-optical signals carrying the same service information, and the transmission delay between the two sub-optical signals is uniquely corresponding to the output port provided by the optical distribution network device, thereby avoiding the problem of low port identification efficiency caused by manual scanning of the two-dimensional code, and facilitating to improve the efficiency of port identification. Moreover, since the transmission delay between different sub-optical signals is determined, the process of port identification performed by the optical network terminal device is not affected by the aging of the two-dimensional code or the non-standard operation of the installation and maintenance personnel, thereby facilitating to improve the accuracy of port identification.

[0017] In an alternative implementation mode of the optical distribution network device provided in the second aspect, the processing module comprises: a splitting component and a combining component. The splitting component is configured to split the first service optical signal to obtain the first sub optical signal and the second sub optical signal. The combining component is configured to combine the first sub optical signal and the second sub optical signal to obtain the second service optical signal. The first output port is further configured to output the second service optical signal.

[0018] In an alternative implementation mode of the optical distribution network device provided in the second aspect, the optical distribution network device further comprises: a second output port, the port feature of the second output port being different from the port feature of the first output port.

[0019] In an alternative implementation mode of the optical distribution network device provided in the second aspect, the port feature of the first output port comprises one or a combination of the following: a transmission time delay between the first sub optical signal and the second sub optical signal, an optical power difference between the first sub optical signal and the second sub optical signal, an encoding bit comprising a first bit value, the first bit value being determined according to the transmission time delay between the first sub optical signal and the second sub optical signal.

[0020] In an alternative implementation mode of the optical distribution network device provided in the second aspect, the splitting component comprises: an i-th splitting component having a first input optical port, a first output optical port and a second output optical port. The combining component comprises: a j-th splitting component having a second input optical port, a third input optical port and a third output optical port. The first input optical port is configured to receive the first service optical signal. The first output optical port is configured to send the first sub optical signal to the second input optical port. The second output optical port is configured to send the second sub optical signal to the third input optical port. The third output optical port is configured to send the second service optical signal.

[0021] In an alternative implementation mode of the optical distribution network device provided in the second aspect, there is one or more levels of passive optical devices between the i-th passive optical device and the j-th passive optical device.

[0022] For example, the one or more levels of passive optical devices comprise: a first passive optical device and a second passive optical device at the same level. The first passive optical device is a 1:M splitter comprising: a first input / output port and M transmission ports; the first sub optical signal passes through the first output optical port, the first input / output port and a first transmission port of the M transmission ports to reach the second input optical port. The second passive optical device is a 1:N splitter comprising: a second input / output port and N transmission ports; the second sub optical signal passes through the second input optical port, the second input / output port and a second transmission port of the N transmission ports to reach the third input optical port.

[0023] For example, M=N=2.

[0024] For another example, M and N are positive integers greater than or equal to 2, and M≠N.

[0025] In an alternative implementation mode of the optical distribution network device provided in the second aspect, the first output port is connected to the second input port, and the second output port is connected to the third input port.

[0026] In an alternative implementation mode of the optical distribution network device provided in the second aspect, the beam splitting component and the beam combining component are separated by one or more beam splitters.

[0027] In an alternative implementation mode of the optical distribution network device provided in the second aspect, the optical path between the first output port and the second input port for the first sub-optical signal is of a first value, and the optical path between the second output port and the third input port for the second sub-optical signal is of a second value, and the difference between the first value and the second value indicates the transmission delay between the first sub-optical signal and the second sub-optical signal.

[0028] In an alternative implementation mode of the optical distribution network device provided in the second aspect, the processing module further comprises: a first optical fiber and a second optical fiber connected between the beam splitting component and the beam combining component. The first optical fiber is used for transmitting the first sub-optical signal, and the second optical fiber is used for transmitting the second sub-optical signal. The length difference between the first optical fiber and the second optical fiber indicates the transmission delay between the first sub-optical signal and the second sub-optical signal.

[0029] In an alternative implementation mode of the optical distribution network device provided in the second aspect, the processing module further comprises: one or more groups of delay passive optical devices. Each group of delay passive optical devices corresponds to a bit value in the encoded bits of the first output port.

[0030] In an alternative implementation mode of the optical distribution network device provided in the second aspect, the one or more groups of delay passive optical devices comprise a second group of delay passive optical devices. The input port of the second group of delay passive optical devices is configured to receive the second service optical signal. The output port of the second group of delay passive optical devices is configured to process the second service optical signal to obtain the first sub-optical signal and the second sub-optical signal, and transmit the first sub-optical signal and the second sub-optical signal to the first output port.

[0031] The second set of delay passive optical devices includes a first alpha-level splitter and a first beta-level splitter. The first alpha-level splitter has a fourth input port, a fourth output port and a fifth output port. The first beta-level splitter has a fifth input port, a sixth input port and a sixth output port. The fourth input port is configured to receive the second service optical signal. The first alpha-level splitter is configured to split the second service optical signal into a third sub optical signal and a fourth sub optical signal. The fourth output port is configured to transmit the third sub optical signal to the fifth input port. The fifth output port is configured to transmit the fourth sub optical signal to the sixth input port. The first beta-level splitter is configured to combine the third sub optical signal and the fourth sub optical signal to obtain a combined second service optical signal. The sixth output port is configured to output the combined second service optical signal.

[0032] In the second aspect, the i-th passive optical device and the j-th passive optical device form a set of delay passive optical devices, and the alpha-th passive optical device and the beta-th passive optical device form another set of delay passive optical devices. Each set of delay passive optical devices is used to represent a bit value. The output port of the optical distribution network device to which the optical network unit is connected can be represented by a code bit composed of multiple bit values, thereby avoiding the case that the transmission delay between the two sub optical signals may have errors, and further improving the accuracy of port identification.

[0033] In an optional implementation of the optical distribution network device provided in the second aspect, the processing module includes a first reflective end face close to the input port and a second reflective end face away from the input port. The first service optical signal passes through the first reflective end face and the second reflective end face to obtain the first sub optical signal. The first service optical signal passes through the first reflective end face, is reflected by the second reflective end face, is reflected by the first reflective end face, and passes through the second reflective end face to obtain the second sub optical signal. In this application, the transmission path of the same service optical signal changes in the optical waveguide (such as an optical fiber), so that the two sub optical signals have a transmission delay, which is beneficial to the optical network terminal device or the optical network unit to determine the port of the optical distribution network device to which the optical network unit is connected according to the transmission delay between the two sub optical signals, thereby improving the port identification efficiency in the optical distribution network device.

[0034] In an optional implementation of the optical distribution network device provided in the second aspect, the optical power of the first sub optical signal and the second sub optical signal is the same. In the case that the optical power of the two sub optical signals is the same, the optical network terminal device (or the optical network unit) determines the port connected by the optical network unit according to the transmission delay between the two sub optical signals or the code bit composed of the bit value corresponding to the transmission delay, thereby avoiding the problem of low port identification efficiency caused by manual scanning of the two-dimensional code, and being beneficial to improving the efficiency of port identification.

[0035] In an optional implementation of the optical distribution network device provided in the second aspect, the first sub-optical signal and the second sub-optical signal have different optical powers. In the case where the two sub-optical signals have different optical powers, the optical line terminal device (or the optical network unit) can accurately distinguish the two sub-optical signals and reduce the influence of the two sub-optical signals on the service optical signals between the optical line terminal device and the optical network unit, thereby the optical line terminal device (or the optical network unit) determines the port connected by the optical network unit according to the port characteristics of the two sub-optical signals, and the accuracy of port identification is further improved.

[0036] In an optional implementation of the optical distribution network device provided in the second aspect, the first output port is further configured to receive a third service optical signal. The processing module is further configured to process the third service optical signal to obtain a third sub-optical signal and a fourth sub-optical signal, and send the third sub-optical signal and the fourth sub-optical signal to the input port, the third sub-optical signal and the fourth sub-optical signal have a transmission time delay, and the third service optical signal, the third sub-optical signal and the fourth sub-optical signal carry the same service information. The input port is further configured to output the third sub-optical signal and the fourth sub-optical signal.

[0037] In the third aspect, the present application provides another port identification method. The port identification method is executed by an optical line terminal device, the optical line terminal device is connected with a plurality of optical network units through an optical distribution network device, and the port identification method provided by the present application includes: the optical line terminal device receives a plurality of groups of service optical signals from the plurality of optical network units, one group of service optical signals corresponds to one optical network unit in the plurality of optical network units, and one group of service optical signals includes: a first sub-optical signal and a second sub-optical signal carrying the same service information, and the first sub-optical signal and the second sub-optical signal have a transmission time delay. And, the optical line terminal device determines a first output port of the optical distribution network device to which an optical network unit is connected according to the transmission time delay between the first sub-optical signal and the second sub-optical signal.

[0038] In the third aspect of the present application, for the service optical signals sent from the optical network unit to the optical line terminal device, the optical distribution network device splits the service optical signals into two sub-optical signals carrying the same service information, and the transmission time delay between the two sub-optical signals is uniquely corresponding to the output port provided by the optical distribution network device, thereby avoiding the problem of low port identification efficiency caused by manual scanning of the two-dimensional code, and facilitating to improve the efficiency of port identification. Moreover, since the transmission time delay between different sub-optical signals is determined, the process of port identification performed by the optical line terminal device will not be affected by the aging of the two-dimensional code or the non-standard operation of the maintenance personnel, thereby facilitating to improve the accuracy of port identification.

[0039] In an optional implementation of the port identification method provided in the third aspect, the optical network terminal device generates port mapping information of one optical network unit, and the port mapping information of one optical network unit comprises: port information of the first output port and identification information of the optical network unit.

[0040] In an optional implementation of the port identification method provided in the third aspect, the identification information of the one optical network unit comprises at least one of a serial number (SN) of the optical network unit and an identification (ID) of the optical network unit. In the present application, the SN or ID of the optical network unit is used to uniquely mark the optical network unit, which avoids the problem that the port is marked to different optical network units, and is beneficial to improving the accuracy of port identification.

[0041] In an optional implementation of the port identification method provided in the third aspect, the port identification method provided in the present application further comprises: the optical network terminal device matches the transmission delay with a port list to determine the first output port of the optical distribution network device to which the one optical network unit is connected. The port list comprises: the transmission delay corresponding to each port in a plurality of ports supported by the optical distribution network device for configuration. For example, the port list is stored in the optical network terminal device. For another example, the port list is stored in a storage device in communication with the optical network terminal device, which is not limited in the present application.

[0042] In an optional implementation of the port identification method provided in the third aspect, the port identification method provided in the present application further comprises: the optical network terminal device obtains the port mapping information of each optical network unit in the plurality of optical network units. And the optical network terminal device generates topology information of the optical distribution network device according to the plurality of port mapping information of the plurality of optical network units, and the topology information comprises: port information of the optical distribution network device to which the plurality of optical network units are connected.

[0043] In the third aspect of the present application, after the optical network terminal device identifies the output port of the optical distribution network device to which each of the plurality of optical network units is connected, the topology information (network topology) of the optical distribution network can be generated according to the output port used by each optical network unit, and in the case that some optical network units fail, these optical network units can be quickly located, which is beneficial to improving the maintenance efficiency of the optical distribution network.

[0044] In an optional implementation of the port identification method provided in the third aspect, the optical distribution network device comprises an input port, a processing module, and a first output port. The output port is configured to receive a first service optical signal sent by the optical network unit. The processing module is configured to process the first service optical signal to obtain a first sub-optical signal and a second sub-optical signal, and send the first sub-optical signal and the second sub-optical signal to the input port. The first service optical signal, the first sub-optical signal, and the second sub-optical signal carry the same service information. The input port is configured to output a group of service optical signals containing the first sub-optical signal and the second sub-optical signal to the optical network termination device.

[0045] In the third aspect of the present application, the service optical signal sent by the optical network unit to the optical network termination device is split by the optical distribution network device into two sub-optical signals carrying the same service information. The transmission delay between the two sub-optical signals corresponds to a unique output port provided by the optical distribution network device, thereby avoiding the problem of low port identification efficiency caused by manual scanning of the two-dimensional code and facilitating the improvement of the port identification efficiency.

[0046] In an optional implementation of the port identification method provided in the third aspect, the processing module comprises a splitting component and a combining component. The splitting component is configured to split the service optical signal (e.g., the first service optical signal) of the optical network unit to obtain the first sub-optical signal and the second sub-optical signal. The combining component is configured to combine the first sub-optical signal and the second sub-optical signal to obtain the second service optical signal. The input port is further configured to output the second service optical signal (e.g., the group of service optical signals) to the optical network termination device.

[0047] In an optional implementation of the port identification method provided in the third aspect, the optical distribution network device provided in the present application further comprises a second output port, the port features of the second output port being different from the port features of the first output port. The optical network termination device can determine different ports used by different optical network units to connect the optical distribution network according to different port features, thereby improving the efficiency and accuracy of port identification.

[0048] In an optional implementation of the port identification method provided in the third aspect, the port features of the first output port comprise one or a combination of the following: the transmission delay between the first sub-optical signal and the second sub-optical signal, the optical power difference between the first sub-optical signal and the second sub-optical signal, an encoding bit containing a first bit value, and the first bit value being determined according to the transmission delay between the first sub-optical signal and the second sub-optical signal.

[0049] In an optional implementation of the port identification method provided in the third aspect, the aforementioned light splitting component comprises: an i-th light splitter having a first input port, a first output port and a second output port. The aforementioned light combining component comprises: a j-th light splitter having a second input port, a third input port and a third output port. The first input port is configured to receive the first service optical signal. The first output port is configured to send the first sub-optical signal to the second input port. The second output port is configured to send the second sub-optical signal to the third input port. The third output port is configured to send the second service optical signal.

[0050] In an optional implementation of the port identification method provided in the third aspect, the first output port is connected to the second input port, and the second output port is connected to the third input port.

[0051] In an optional implementation of the port identification method provided in the third aspect, the light splitting component and the light combining component are separated by one or more light splitters.

[0052] In an optional implementation of the port identification method provided in the third aspect, an optical path between the first output port and the second input port for the first sub-optical signal has a first value, and an optical path between the second output port and the third input port for the second sub-optical signal has a second value. A difference between the first value and the second value indicates a transmission delay between the first sub-optical signal and the second sub-optical signal.

[0053] In an optional implementation of the port identification method provided in the third aspect, the processing module further comprises: a first optical fiber and a second optical fiber connected between the light splitting component and the light combining component. The first optical fiber is configured to transmit the first sub-optical signal, and the second optical fiber is configured to transmit the second sub-optical signal. A length difference between the first optical fiber and the second optical fiber indicates a transmission delay between the first sub-optical signal and the second sub-optical signal.

[0054] In an optional implementation of the port identification method provided in the third aspect, the processing module further comprises: one or more groups of delay passive optical devices. Each group of delay passive optical devices corresponds to a bit value in the encoded bits of the first output port.

[0055] In an optional implementation of the port identification method provided in the third aspect, the aforementioned one or more groups of delay passive optical devices comprise a second group of delay passive optical devices. An input port of the second group of delay passive optical devices is configured to receive the second service optical signal. An output port of the second group of delay passive optical devices is configured to process the second service optical signal to obtain the first sub-optical signal and the second sub-optical signal, and send the first sub-optical signal and the second sub-optical signal to the first output port.

[0056] Exemplarily, the second set of delay passive optical devices comprises: an alpha-level optical splitter and a beta-level optical splitter. The alpha-level optical splitter has a fourth input port, a fourth output port and a fifth output port; the beta-level optical splitter has a fifth input port, a sixth input port and a sixth output port. The fourth input port is configured to receive the second service optical signal; the alpha-level optical splitter is configured to split the second service optical signal to obtain a third sub-optical signal and a fourth sub-optical signal; the fourth output port is configured to transmit the third sub-optical signal to the fifth input port; the fifth output port is configured to transmit the fourth sub-optical signal to the sixth input port; the beta-level optical splitter is configured to combine the third sub-optical signal and the fourth sub-optical signal to obtain the combined second service optical signal; and the sixth output port is configured to output the combined second service optical signal.

[0057] In an optional implementation of the port identification method provided in the third aspect, the processing module comprises: a first reflective end face close to the input port and a second reflective end face away from the input port. The first service optical signal passes through the second reflective end face and the first reflective end face to obtain a first sub-optical signal. The first service optical signal passes through the second reflective end face, is reflected by the first reflective end face, is reflected by the second reflective end face, and passes through the first reflective end face to obtain a second sub-optical signal.

[0058] In an optional implementation of the port identification method provided in the third aspect, the optical powers of the first sub-optical signal and the second sub-optical signal are the same.

[0059] In an optional implementation of the port identification method provided in the third aspect, the optical powers of the first sub-optical signal and the second sub-optical signal are different.

[0060] In the port identification method provided in the first aspect or the third aspect, the optical distribution network device provided in the second aspect, the service optical signal can also be replaced by a test optical signal or other types of optical signals, that is, the service indicated by the service optical signal includes one or a combination of the following: test service, communication service and other possible services.

[0061] In the fourth aspect, the present application provides an optical network terminal device. The optical network terminal device comprises: a transceiver and a processor. The transceiver is configured to transmit a request optical signal or receive a service optical signal, and the transceiver and the processor are configured to cooperatively perform the operation steps of the method in the third aspect and any optional implementation of the third aspect.

[0062] In the fifth aspect, the present application provides an optical network unit. The optical network unit comprises: a transceiver and a processor. The transceiver is configured to receive a request optical signal or a service optical signal, and the transceiver and the processor are configured to cooperatively perform the operation steps of the method in the first aspect and any optional implementation of the first aspect.

[0063] In a sixth aspect, the present application provides a communication system. The communication system comprises the optical network distribution device of the second aspect, the optical line termination device of the fourth aspect, and the optical network unit of the fifth aspect. The optical line termination device and the optical network unit are connected through the optical network distribution device, and the optical network distribution device comprises: an input port close to the optical line termination device, and a plurality of output ports away from the optical line termination device, and a first output port of the plurality of output ports is connected to the optical network unit.

[0064] In a seventh aspect, the present application provides a computer program product. When the computer program product is executed by a communication device, the communication device can be used to implement the method in any of the optional implementation manners of the first aspect or the third aspect. For example, the communication device can be an optical line termination device or an optical network unit.

[0065] The beneficial effects of the fourth aspect to the seventh aspect can be referred to the description of any of the optional implementation manners of the first aspect to the third aspect, which will not be repeated here. On the basis of the implementation manners of the above aspects, the present application can be further combined to provide more implementation manners. BRIEF DESCRIPTION OF DRAWINGS

[0066] FIG. 1 is a structural schematic diagram of an optical communication network provided by the present application;

[0067] FIG. 2 is a structural schematic diagram of a PON provided by the present application;

[0068] FIG. 3 is a structural schematic diagram of an ONU and an OLT provided by the present application;

[0069] FIG. 4 is a flowchart of a port identification method provided by the present application;

[0070] FIG. 5 is a flowchart of another port identification method provided by the present application;

[0071] FIG. 6A is a structural schematic diagram of an ODN device provided by the present application;

[0072] FIG. 6B is a structural schematic diagram of another ODN device provided by the present application;

[0073] FIG. 7 is a structural schematic diagram of a third ODN device provided by the present application;

[0074] FIG. 8 is a structural schematic diagram of a fourth ODN device provided by the present application;

[0075] FIG. 9 is a structural schematic diagram of a fifth ODN device provided by the present application;

[0076] FIG. 10 is a structural schematic diagram of a sixth ODN device provided by the present application;

[0077] Fig. 11 is a structural schematic diagram of an ODN device provided in the present application;

[0078] Fig. 12 is a flowchart of a port identification method provided in the present application;

[0079] Fig. 13 is a flowchart of a port identification method provided in the present application;

[0080] Fig. 14 is a structural schematic diagram of an ODN device provided in the present application;

[0081] Fig. 15 is a structural schematic diagram of a port identification device provided in the present application. DETAILED DESCRIPTION

[0082] The present application provides a port identification method and device, which solves the problem of low port identification efficiency caused by manual scanning of a two-dimensional code, and also solves the problem of low port identification accuracy caused by aging of the two-dimensional code and non-standard operation of installation and maintenance personnel.

[0083] The service optical signal sent from the optical network terminal device to the optical network unit is split by the optical distribution network device into two sub-optical signals carrying the same service information, and the transmission delay between the two sub-optical signals uniquely corresponds to the output port provided by the optical distribution network device, avoiding the problem of low port identification efficiency caused by manual scanning of a two-dimensional code, and being conducive to improving the efficiency of port identification. Moreover, since the transmission delay between different sub-optical signals is determined, the process of port identification performed by the optical network unit will not be affected by the aging of the two-dimensional code or the non-standard operation of installation and maintenance personnel, which is conducive to improving the accuracy of port identification.

[0084] Corresponding to the service optical signal sent from the optical network terminal device to the optical network unit, for the service optical signal sent from the optical network unit to the optical network terminal device, the optical distribution network device splits the service optical signal into two sub-optical signals carrying the same service information, and the transmission delay between the two sub-optical signals uniquely corresponds to the output port provided by the optical distribution network device, avoiding the problem of low port identification efficiency caused by manual scanning of a two-dimensional code, and being conducive to improving the efficiency of port identification. Moreover, since the transmission delay between different sub-optical signals is determined, the process of port identification performed by the optical network terminal device will not be affected by the aging of the two-dimensional code or the non-standard operation of installation and maintenance personnel, which is conducive to improving the accuracy of port identification.

[0085] The technical solutions involved in the present application can be applied not only to current optical communication technology or point-to-multipoint communication scenarios, but also to future optical communication technology or point-to-multipoint communication scenarios, or communication networks including optical communication networks or point-to-multipoint communication scenarios. The terms used in the embodiment part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. Some concepts that can be involved in the present application will be briefly introduced below.

[0086] FIG. 1 is a schematic diagram of the structure of an optical communication network provided by the present application, which can also be referred to as an optical transmission network or an optical network. The optical communication network includes a plurality of network devices, one or more of which are used to connect terminals of users (such as terminals 111-116 shown in FIG. 1).

[0087] A terminal can also be referred to as a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc.

[0088] In some embodiments, a terminal can be a mobile phone (such as terminals 111 and 116 shown in FIG. 1), a tablet computer (such as terminal 112 shown in FIG. 1), a computer with wireless transceiver function (such as terminal 113 shown in FIG. 1), a personal communication service (PCS) phone (such as terminal 114 shown in FIG. 1), a desktop computer (such as terminal 115 shown in FIG. 1), a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.

[0089] In some embodiments, the terminal can also be a home gateway. The home gateway can be an optical network terminal (ONT) for example. The network device 121 shown in FIG. 1 can be an optical network terminal for example. The optical network terminal can access the Internet for user devices such as PCs, mobile phones, etc. The home gateway can transmit data of the following services: Internet access services (such as interactive network television services including video rate broadcast, live broadcast services and distance education, etc.), online game services (such as game terminals conducting game services through the home gateway), Internet protocol (IP) telephones, video telephones and video play services, etc. For another example, the home gateway can also implement home control and security service management on remote networks. For example, a user with a home gateway can access the automatic lighting, heating and security systems, etc. in the area covered by the home gateway during work or travel. Embodiments of the present application do not limit the specific technology and specific device form of the terminal.

[0090] The network device can be a routing and forwarding device, which can be a router or a switch, etc. and can be a core router (CR), a provider edge (PE), etc. The network device can also be a broadband network gateway (BNG) or a broadband remote access server (BRAS), etc.

[0091] The terminal can access the server through the network device. For example, in the room shown in FIG. 1, the first user can use the terminal 111 to establish a communication connection with the network device 121 through wireless-fidelity (WIFI) technology, so that the terminal 111 sends a service request to the server 130.

[0092] The server 130 can be an application server or an authentication and authorization server. The server 130 can provide video services, game services, message services, music services, authentication and authorization services, etc. In one example, the functions of multiple services can be integrated on the server 130, for example, game services and music services can be deployed on the server 130. In another example, the server 130 can also integrate the functions of part of the services, for example, the server 130 can deploy part of the game services and part of the video services. The server 130 can also provide multiple virtual machines through virtualization technology, and each virtual machine can provide a service. Embodiments of the present application do not limit the deployment form of the services.

[0093] The network device is connected with the server 130 through wireless or wired mode. FIG. 1 is only a schematic diagram, and other devices can also be included in the optical communication network, which are not shown in FIG. 1. Embodiments of the present application do not limit the number of terminal devices, network devices and servers included in the optical communication network.

[0094] The present application can be applied to PON, passive optical LAN (POL), industrial optical network, vehicle-mounted optical network, Internet of Things and the like. For example, in the PON scenario, the optical transmitting device (such as the network device 121) can be located in the user's home or user's corridor, and the optical receiving device (such as the network device 122) can be located in the operator's machine room. The optical transmitting device and the optical receiving device in the POL scenario can be located in a park (such as an enterprise, a campus, etc.). The optical transmitting device and the optical receiving device in the industrial optical network scenario can be located in an industrial manufacturing workshop. The optical transmitting device and the optical receiving device in the vehicle-mounted optical network scenario can be arranged in a vehicle. For example, in the PON scenario, the network device 121 can be an optical network unit (ONU) or an ONT, and the network device 122 can be an OLT. In the vehicle-mounted optical network scenario, the optical transmitting device can be a vehicle interface unit (VIU), and the optical receiving device can be a mobile data center (MDC), a vehicle dynamic control (VDC) or a cockpit data center (CDC). The technical solutions provided by the present application can also be applied to optical backbone transmission network, data center optical transmission, short-distance optical interconnection and wireless service front-haul / back-haul, etc. Specifically, the technical solutions provided by the present application can be used for optical transmitting devices and / or optical receiving devices corresponding to the above different networks.

[0095] Taking the PON as an example, embodiments of the present application can be applied to a time division multiple-passive optical network (TDM-PON), and can also be applied to a wavelength division multiplexing passive optical network (WDM-PON). FIG. 2 is a structural schematic diagram of a PON provided by the present application. As shown in FIG. 2, a plurality of ONUs (such as the ONUs 211 to 214 in FIG. 2) communicate with an OLT 220 through a splitter 230.

[0096] The signal frames transmitted by the ONUs 211 to 214 to the OLT 220 respectively are signal t1, signal t2, signal t3 and signal t4. After receiving the signals sent by the ONUs, the OLT 220 performs the service or operation indicated by the signals, such as registering, ranging or port identification, topology restoration of the ONUs, etc.

[0097] Fig. 3 is a schematic diagram of an ONU and an OLT provided by the present application, wherein the ONU 310 can be any one of the ONUs 211-214 shown in Fig. 2, the OLT 320 can be the OLT 220 shown in Fig. 2, and the ONU 310 and the OLT 320 are connected through an ODN 330.

[0098] As shown in Fig. 3, the ONU 310 includes an ONU media access control (MAC) 311, an ONU physical layer (PHY) 312, a laser 313, and a photodetector 314. In the transmitting direction, the ONU MAC 311 can control the turning on and off of the laser 313 through a transmit enable port (Tx_En, also referred to as a switch pin). For example, if the ONU 310 is currently in a light-emitting time slot (also referred to as an occupied time slot), the ONU MAC 311 controls the laser 313 to turn on through the transmit enable port, and if the ONU 310 is not in the light-emitting time slot, the ONU MAC 311 controls the laser 313 to turn off through the transmit enable port. The ONU PHY 312 can also adjust the physical parameters of the laser 313, such as the laser bias current and the modulation current, through a transmit control port (Tx_Ctr). The ONU MAC 311 can send a service packet to the ONU PHY 312 through a data port (Data), and the ONU PHY 312 transmits the service packet. The ONU PHY 312, also referred to as a driver or a driver chip of the laser 313, is used to drive the laser to generate an optical signal according to the instructions of the transmit enable port and / or the transmit control port of the ONU MAC 311. The laser 313 modulates the service packet into an optical signal under the control of the ONU PHY 312, and sends the uplink optical signal carrying the service packet to the OLT 320 through an optical fiber. In the receiving direction, the photodetector 314 receives a downlink optical signal from the OLT 320 and converts the downlink optical signal into an electrical signal. The ONU PHY 312 transmits the electrical signal, and the ONU MAC 311 analyzes the electrical signal to obtain the service packet. The ONU 310 can also include a wavelength division multiplexer 315, which is used to send the uplink optical signal generated by the laser 313 into the optical fiber, and send the downlink optical signal received from the optical fiber to the photodetector 314.

[0099] OLT 320 can include OLT MAC 321, OLT PHY 323, photodetector 324 and laser 325. In the receiving direction, photodetector 324 receives the upstream optical signal from ONU 310 and converts the upstream optical signal into an electrical signal. The electrical signal is filtered by OLT PHY 323 using a low-pass filter, and the filtered signal is processed to obtain binary bit information of the service message or the registration message, and the binary bit information is transmitted to OLT MAC 321, which performs a registration process or a service according to the binary bit information. Exemplarily, the signal processing included in the OLT includes one or a combination of the following: frequency sweeping, threshold judgment, information decision, port identification, and network topology restoration.

[0100] In the transmitting direction, OLT MAC 321 generates a service message or a registration authorization instruction, and OLT PHY 323 performs analog or digital correlation processing on the service message or the registration authorization instruction. Laser 325 modulates the service message or the registration authorization instruction into an optical signal under the control of OLT PHY 323, and transmits the downstream optical signal carrying the service message or the registration authorization instruction to ONU 310 through an optical fiber. OLT 320 can further include a wavelength division multiplexer 326 for transmitting the downstream optical signal generated by laser 325 into an optical fiber, and transmitting the upstream optical signal received from the optical fiber to photodetector 324.

[0101] ODN 330 includes one or more passive optical devices, such as one or more optical splitters, etc. These passive optical devices are used to split and combine the service optical signal, so that the sub-optical signals carrying the same service information as the service optical signal have a transmission delay, and then the port identification is performed by the ONU or the OLT based on the transmission delay, which will be described in the embodiments below.

[0102] Based on the ONU and OLT shown in FIG. 3, the present embodiment provides a port identification method, which can be performed by the OLT or the ONU, and the port identification method performed by the OLT will be described first.

[0103] As shown in FIG. 4, FIG. 4 is a flowchart of a port identification method provided by the present application, in which the OLT can be referred to as an optical receiving device, a second network device, an optical network device, an optical network terminal device, etc. The hardware implementation of the OLT can refer to the description of OLT 320, which will not be described here. ONU 1 to ONU 4 are all downstream (network) devices of the OLT, such as ONU 1, which can be referred to as an optical transmitting device, a first network device, an optical network unit, etc. The hardware implementation of the ONU can refer to the description of ONU 310, which will not be described here.

[0104] As shown in FIG. 4, the port method in the optical communication network provided by the embodiment includes the following steps S410-S440.

[0105] S410, the OLT sends a request optical signal to a plurality of optical network units in the optical communication network.

[0106] Corresponding to the process of S410, each optical network unit in the plurality of optical network units receives the request optical signal of the OLT. The following takes ONU 1 as an example for illustration, i.e., ONU 1 receives the request optical signal of the OLT.

[0107] In one possible example, the request optical signal can be an optical signal specially used for requesting port identification service.

[0108] In another possible example, the request optical signal can be other service optical signal between the OLT and ONU 1, such as a test optical signal.

[0109] The above two possible examples are only optional manners provided by the embodiment, and should not be understood as a limitation to the present application. In some optional implementation manners, ONU 1 can also perform the port identification process according to the request optical signal, which can be referred to the description of FIG. 12 and FIG. 13 below, and will not be described here.

[0110] It is worth noting that in the embodiment of the present application, the process of S410 is not a necessary step in the port identification process, but an optional step. In some optional embodiments, the OLT can start the port identification process according to the received optical signal, such as S420 and S430 below.

[0111] In the embodiment, after ONU 1 receives the request optical signal, it sends a service optical signal corresponding to the request optical signal to the OLT.

[0112] S420, ONU 1 sends the service optical signal to the OLT.

[0113] Corresponding to the process of S420, the OLT receives the service optical signal of ONU 1.

[0114] It is worth noting that since the OLT sends the request optical signal to a plurality of optical network units (ONUs), the OLT can not only receive the service optical signal of ONU 1, but also receive the service optical signal of other optical network units (ONUs).

[0115] The process of generating the optical signal inside ONU 1 can refer to the description of the foregoing FIG. 3, which will not be described here.

[0116] For example, one of the groups of service optical signals corresponds to ONU 1 of the plurality of optical network units. In this example, the service optical signal can also be a service optical signal sent by ONU 1 in a normal operation, which is not limited in the present application.

[0117] In S430, the OLT parses the service optical signal in S420 to obtain the first sub optical signal and the second sub optical signal from ONU 1.

[0118] In some optional examples, the step corresponding to S430 can also be selectively executed, which is not limited in the present application.

[0119] The service optical signal of ONU 1 includes the first sub optical signal and the second sub optical signal carrying the same service information, and the first sub optical signal and the second sub optical signal have a transmission time delay.

[0120] In some possible cases, the first sub optical signal and the second sub optical signal both carry identification information of ONU 1.

[0121] For the content contained in the identification information, several possible examples are provided below.

[0122] In one possible example, the identification information of ONU 1 includes a serial number (SN) of ONU 1.

[0123] In another possible example, the identification information of ONU 1 includes an identification (ID) of ONU 1, referred to as ONU ID.

[0124] In yet another possible example, the identification information of ONU 1 includes the SN and the ONU ID of ONU 1.

[0125] The above three possible examples are only optional ways of the identification information provided in the present embodiment, and the identification information can also be other labels or information for uniquely marking ONU 1, which is not limited in the present application.

[0126] In the present embodiment, the SN or ID of the optical network unit is used to uniquely mark the optical network unit, which avoids the problem that the port is marked to different optical network units, and is beneficial to improving the accuracy of port identification.

[0127] For the first sub optical signal and the second sub optical signal described above, two optional implementation manners are provided below.

[0128] In a first optional manner, the optical power of the first sub optical signal and the second sub optical signal is the same.

[0129] The optical power refers to the work done by the light in a unit of time. The optical power unit is commonly expressed in milliwatts (mw) and decibel-milliwatts (dBm), wherein 1 mw = 0 dBm, and the decibel-milliwatts less than 1 mw is negative. In some cases, the optical power of the aforementioned sub-optical signal can also be referred to as the energy of the sub-optical signal, which is not limited in the present application.

[0130] In the case that the optical powers of the two sub-optical signals are the same, the OLT determines the port of the ODN device to which the ONU is connected according to the transmission delay of the two sub-optical signals, thereby avoiding the problem of low port identification efficiency caused by manual scanning of the two-dimensional code, and facilitating the improvement of the efficiency of port identification.

[0131] In the second optional manner, the optical powers of the first sub-optical signal and the second sub-optical signal are different.

[0132] For example, it is assumed that the first sub-optical signal is a weak signal component, and the second sub-optical signal is a strong signal component, such as the energy ratio between the first sub-optical signal and the second sub-optical signal is a:b, wherein a+b = 1, for example, a = 5%, and b = 95%.

[0133] For example, it is assumed that the first sub-optical signal is a strong signal component, and the second sub-optical signal is a weak signal component, such as the energy ratio between the first sub-optical signal and the second sub-optical signal is a:b, wherein a+b = 1, for example, a = 95%, and b = 5%.

[0134] In the present implementation, “strong” and “weak” are relative concepts, and should not be understood as a limitation of the present application. In the case that the optical powers of the two sub-optical signals are different, the OLT can accurately distinguish the two sub-optical signals and reduce the influence of the two sub-optical signals on the service optical signal between the OLT and the ONU, thereby determining the port information of the ODN device to which the ONU is connected according to the transmission delay of the two sub-optical signals, and further improving the accuracy of port identification.

[0135] S440, the OLT determines the first output port (port 1) of the ODN device to which the ONU 1 is connected according to the transmission delay between the first sub-optical signal and the second sub-optical signal.

[0136] Optionally, regarding the specific implementation steps of S440, the following FIG. 5 provides an optional example, as shown in FIG. 5, which is a flow diagram of another method for identifying a port according to an embodiment of the present application. The processes of S410 to S430 can refer to the related description of FIG. 4, which will not be repeated here.

[0137] Please refer to FIG. 5, after S430, S440 in the method for identifying a port according to an embodiment of the present application includes the following S441.

[0138] S441. The OLT matches the transmission delay between the first optical sub-signal and the second optical sub-signal with the port list, and determines the first output port (port 1) of the ODN device to which the ONU 1 is connected.

[0139] The port list includes: port characteristics corresponding to each output port of the ODN device, including: transmission delays between different sub-signals carrying the same service information output from the same output port of the ODN device.

[0140] The following provides two optional examples for storing the port list.

[0141] In an optional example, the port list is stored in a memory in an optical network terminal device (OLT).

[0142] In another optional example, the port list is stored in a storage device that communicates with the optical network terminal (OLT), such as a storage server, a base station, or another storage system with a storage function.

[0143] The above two optional examples are merely optional ways of providing a port list in this embodiment and should not be understood as limiting the present application.

[0144] Regarding the data organization format of the information stored in the port list, two possible examples are provided below.

[0145] In a first feasible example, the port list includes: all ports supported by the OLT and the port feature corresponding to each port.

[0146] In a second feasible example, the port list includes typical port features and the ports corresponding to these port features. The typical port features may be set by the user or pre-configured by the OLT based on local computing capabilities, which is not limited in this application.

[0147] It is worth noting that the above two feasible examples are merely optional ways of providing the content in the port list provided in this embodiment and should not be understood as limiting the present application.

[0148] Regarding the physical form of multiple ports supported by the OLT, two optional scenarios are provided below.

[0149] In a first optional scenario, the multiple ports supported for configuration by the OLT are all physical ports integrated in the OLT.

[0150] In a second optional scenario, the multiple ports supported by the OLT for configuration are physical ports provided by the ODN device.

[0151] The above two optional cases are only examples provided by the embodiment and should not be construed as a limitation to the present application.

[0152] In the embodiment shown in FIG. 5, the OLT can quickly identify the port used by the ONU 1 based on the port list and the resolved port features, thereby avoiding the problem of low port identification efficiency caused by manual scanning of the two-dimensional code and facilitating the improvement of the port identification efficiency.

[0153] The port features of the output port and the structural design of the ODN device will be described below by way of example with reference to the accompanying drawings.

[0154] The port features of the above first output port (port 1) include one or a combination of the following: a transmission time delay between the first and second sub optical signals, an encoding bit containing a first bit value, and an optical power difference between the first and second sub optical signals. The first bit value may, for example, be determined according to the transmission time delay between the first and second sub optical signals.

[0155] In the embodiment, the port features and the output ports of the ODN device to which the ONU 1 is connected have a unique corresponding relationship, i.e., different output ports in the ODN device correspond to different port features.

[0156] The possible contents of the port features will be described below by way of example.

[0157] In a first optional implementation, the port features include an optical power difference between the two sub optical signals.

[0158] For example, the optical power difference can refer to a difference between the optical power (P1) of the first sub optical signal and the optical power (P2) of the second sub optical signal, i.e., optical power difference P△ = P1-P2. Alternatively, the optical power difference can refer to a difference between the optical power (P2) of the second sub optical signal and the optical power (P1) of the first sub optical signal, i.e., optical power difference P△ = P2-P1. Alternatively, the optical power difference can refer to an absolute value of the difference between the optical power (P1) of the first sub optical signal and the optical power (P2) of the second sub optical signal, i.e., optical power difference P△ = |P1-P2|. For example, P1 = P0 x 5%, P2 = P0 x 95%, P△ = |P1-P2| = |P0 x 5%-P0 x 95%| = 0.9P0.

[0159] For example, the optical power difference value can be a ratio between the optical power (P1) of the first sub optical signal and the optical power (P2) of the second sub optical signal, i.e., the optical power difference value PΔ = P1 / P2. Alternatively, the optical power difference value can be a ratio between the optical power (P2) of the second sub optical signal and the optical power (P1) of the first sub optical signal, i.e., the optical power difference value PΔ = P2 / P1.

[0160] It is worth noting that, since the first sub optical signal and the second sub optical signal are obtained after the passive optical device splits the service optical signal, the sum of the optical powers of the two sub optical signals is less than or equal to the optical power (P0) of the service optical signal emitted by the ONU, i.e., P0≥P1+P2.

[0161] For example, P1 = P0×5%, P2 = P0×95%, then PΔ = P1 / P2 = 5% / 95% = 1 / 19, or PΔ = P2 / P1 = 95% / 5% = 19.

[0162] The above optical power difference value is only an optional implementation of the port feature provided in the embodiments of the present application and should not be construed as a limitation of the present application. In the present embodiment, different sub optical signals with different optical powers are marked by different ports, which can effectively distinguish the sub optical signals with energy differences output by the same output port in the optical communication network to determine the output port of the ODN device connected by different ONUs. The OLT can quickly confirm the port used by the ONU by identifying the intensity between the two sub optical signals carrying the same identification information, thereby avoiding the problem of low efficiency caused by manual scanning of the ODN node. Moreover, the transmission of the sub optical signal is not affected by manual operation specifications, which is conducive to improving the accuracy of port identification.

[0163] In a second optional implementation, the port feature includes a transmission delay between the two sub optical signals.

[0164] For example, port 1-δt1, port 2-δt2,..., and port n-δtn. In the present example, port 1 refers to the first output port, and δt1 is the ID of ONU 1 (ONU ID = δt1). Port n refers to the nth port, and δtn is the ID of ONU n (ONU ID = δtn).

[0165] In the process of optical signal transmission, the service optical signal sent by ONU 1 to the OLT optical network terminal device becomes two different sub optical signals after being split. The OLT can determine the port used by the ONU 1 to connect the ODN based on the transmission delay between the two different sub optical signals, so that the port used by the ONU 1 is identified by the OLT, thereby avoiding the problem of low port identification efficiency caused by manual scanning of the two-dimensional code and being conducive to improving the efficiency of port identification.

[0166] Moreover, since the port characteristics between different sub-optical signals are determined, the process of port identification performed by the OLT is not affected by the aging of the two-dimensional code or the non-standard operation of the maintenance personnel, which is conducive to improving the accuracy of port identification by the OLT.

[0167] In the case where the OLT supports a plurality of ports configured to provide physical ports for the ODN, the ODN between the OLT and the ONU 1 is further described below with reference to the accompanying drawings.

[0168] FIG. 6A is a structural schematic diagram of an ODN device provided by the present application. The introduction of the OLT and the ONUs can refer to the description of the foregoing FIGS. 2 to 4, which will not be described here. In the present embodiment, the OLT and the plurality of ONUs are connected through the ODN device, and the passive optical device in the ODN device provides a plurality of optical channels, such as optical channel 1 to optical channel 4 in FIG. 6A. The optical channel 1 can also be referred to as the first optical channel, the optical channel 2 can also be referred to as the second optical channel, the optical channel 3 can also be referred to as the second optical channel, and the optical channel 4 can also be referred to as the fourth optical channel. The present application does not limit the optical channels that can be provided by the ODN device.

[0169] In FIG. 6A, the plurality of optical channels are connected to the OLT through an input port. Each optical channel further includes an output port for connecting to an ONU. For example, taking the optical channel 1 as an example: the optical channel includes an input port and an output port 1 (also referred to as a first output port). In FIG. 6A, the input port and the output port 1 are oppositely arranged.

[0170] In the present embodiment, the output ports of each optical channel are respectively connected to different ONUs, such as the output port 1 (also referred to as the first output port) included in the optical channel 1 connected to the ONU 1, the output port 2 (also referred to as the second output port) included in the optical channel 2 connected to the ONU 2, the output port 3 (also referred to as the third output port) included in the optical channel 3 connected to the ONU 3, and the output port 4 (also referred to as the fourth output port) included in the optical channel 4 connected to the ONU 4. It is worth noting that FIG. 6A only shows 4 optical channels and 4 output ports, but according to the capacity of the optical communication network, the ODN device can also provide more or fewer optical channels or output ports, which are not limited by the present application.

[0171] In some examples, the output port can also be referred to as a branch optical port, a branch output port, an ODN port, an ODN node, or an ODN branch node, etc., which are not limited by the present application.

[0172] Optionally, the input port and the output ports in FIG. 6A can be provided by passive optical devices, which refer to a kind of devices that do not have internal photoelectric energy conversion in the process of realizing their own functions in optical fiber communication, also known as optical passive devices. For example, the passive optical devices can include but are not limited to: optical splitters, optical fiber connectors, optical directional couplers, optical isolators, optical attenuators, wavelength division multiplexers, etc. The passive optical devices can realize fiber connection, optical power distribution, optical signal attenuation, and optical wavelength division multiplexing in an optical path or an optical channel, and have the characteristics of high return loss, low insertion loss, high reliability, stability, mechanical wear resistance and corrosion resistance, easy operation, etc.

[0173] Embodiments of the present application take a passive optical splitter as an example for illustration. The optical power transmitted by the passive optical splitter can realize splitting / combining or splitting / combining of optical signals of the same wavelength, so the passive optical splitter can also be referred to as an optical splitter. In terms of the working mechanism of the optical splitter, the optical splitter can also be referred to as a coupler, such as an X-type (2:2) optical splitter / coupler, a Y-type (1:2) optical splitter / coupler, a star-type (N:N) optical splitter / coupler, and a tree-type (1:N, N>2) optical splitter / coupler, etc. The Y-type (1:2) optical splitter can also be referred to as a one-to-two optical splitter, and the tree-type (1:N, N>2) optical splitter can also be referred to as a one-to-N optical splitter.

[0174] In some optional cases, the optical splitter provided by the embodiments of the present application can also be replaced by other passive optical devices such as a wavelength division multiplexer. For example, the wavelength division multiplexer is used for splitting / combining or splitting / combining of optical signals of different wavelengths, so the wavelength division multiplexer is also referred to as a wave division / combiner or a wavelength multiplexer / demultiplexer. The purpose of applying the wavelength division multiplexer in the passive optical network is to improve the capacity of the network to carry information. The capacity is increased by a multiple of the number of wavelengths multiplexed by the device. The more the number of multiplexed wavelengths, the greater the multiple of the information amount.

[0175] The structure included in the ODN device is exemplarily described below based on FIG. 6A. The present application provides a deployment design of an ODN device. FIG. 6B is a schematic structural diagram of an ODN device provided by the present application. The ODN device includes an input port, a processing module 610, and a plurality of output ports. The contents of the input port and the plurality of output ports can refer to the contents of the foregoing FIG. 6A, which are not described herein.

[0176] With reference to the embodiments of FIG. 4 to FIG. 6A, the functions of the input port, the processing module 610 and the first output port (port 1) associated with the ONU 1 are exemplarily described in the transmission of the service optical signal from the ONU 1 to the OLT.

[0177] The first output port (port 1) is configured to receive the first service optical signal from the ONU 1.

[0178] The processing module 610 is configured to: process the first service optical signal to obtain a first sub-optical signal and a second sub-optical signal, and send the first sub-optical signal and the second sub-optical signal to the input port, the first sub-optical signal and the second sub-optical signal having a transmission time delay therebetween, the first service optical signal, the first sub-optical signal and the second sub-optical signal carrying the same service information.

[0179] The input port is configured to output the first sub-optical signal and the second sub-optical signal to an optical line termination device (OLT).

[0180] The processing module 610 includes a splitting component 611 and a combining component 612, as shown in FIG. 6B.

[0181] The splitting component 611 is configured to split the first service optical signal from the ONU 1 to obtain the first sub-optical signal and the second sub-optical signal.

[0182] The combining component 612 is configured to combine the first sub-optical signal and the second sub-optical signal to obtain a combined service optical signal, such as the second service optical signal.

[0183] The input port is further configured to output the second service optical signal to the OLT, the second service optical signal being the service optical signal received by the OLT in S420.

[0184] Optionally, in FIG. 6B, the processing module 610 further includes a first optical fiber and a second optical fiber connecting the splitting component 611 and the combining component 612. The first optical fiber is configured to transmit the first sub-optical signal, and the second optical fiber is configured to transmit the second sub-optical signal.

[0185] In this embodiment, the length difference between the first optical fiber and the second optical fiber indicates the transmission time delay between the first sub-optical signal and the second sub-optical signal. For example, the first optical fiber and the second optical fiber adopt the same refractive index of optical transmission medium, and the length of the second optical fiber is 10 centimeters (cm) longer than that of the first optical fiber. Then, the optical path difference between the first sub-optical signal and the second sub-optical signal is 10 cm x the refractive index, and the transmission time delay between the first sub-optical signal and the second sub-optical signal can be obtained by dividing the optical path difference by the speed of light.

[0186] In the embodiment of the present application, the ODN device splits the service optical signal into two sub-optical signals carrying the same service information. The transmission delay between the two sub-optical signals corresponds to the output port provided by the optical distribution network device, avoiding the problem of low port identification efficiency caused by manual scanning of the two-dimensional code, and facilitating the improvement of the efficiency of port identification.

[0187] Moreover, since the transmission delay between different sub-optical signals is determined, the process of port identification performed by the optical network terminal device is not affected by the aging of the two-dimensional code or the non-standard operation of the installation and maintenance personnel, facilitating the improvement of the accuracy of port identification.

[0188] Based on FIG. 6A, the structure of the optical splitter included in the optical channel 1 is exemplarily described below. The present application provides a deployment design of an ODN device. FIG. 7 is a structural schematic diagram of an ODN device provided by the present application. The processing module in the ODN device includes a first-level optical splitter 710 and a plurality of groups of delay optical splitters.

[0189] It is worth noting that FIG. 7 shows four groups of delay optical splitters, but the ODN device can also include a larger or smaller number of delay optical splitters. The first-level optical splitter 710 is connected to the OLT and each group of delay optical splitters, respectively.

[0190] The first group of delay optical splitters in the plurality of groups of delay optical splitters is used to provide the optical path corresponding to the aforementioned optical channel 1. In FIG. 7, the first group of delay optical splitters corresponding to the optical channel 1 includes an i-level optical splitter 721 and a j-level optical splitter 722, which can also be collectively referred to as the first group of delay optical splitters.

[0191] The i-level optical splitter 721 includes an optical port 1 (first optical port), an optical port 2 (second optical port), and an optical port 3 (third optical port).

[0192] The j-level optical splitter 722 includes an optical port 4 (fourth optical port), an optical port 5 (fifth optical port), and an optical port 6 (sixth optical port).

[0193] In FIG. 7, the optical port 6 (sixth optical port) corresponds to the output port 1 (first output port).

[0194] For the process of optical signal transmission in the ODN device, the following takes the service optical signal being sent from the ONU 1 to the OLT as an example for description.

[0195] The optical port 6 is configured to receive the service optical signal of the ONU 1.

[0196] The j-level optical splitter 722 is configured to split the service optical signal of the ONU 1 to obtain a first sub-optical signal and a second sub-optical signal.

[0197] The optical port 5 is configured to transmit the second sub optical signal to the optical port 4.

[0198] The optical port 4 is configured to transmit the first sub optical signal to the optical port 2.

[0199] The i-th splitter 721 is configured to combine the first sub optical signal and the second sub optical signal to obtain a combined service optical signal. In the combined service optical signal, the port characteristic between the first sub optical signal and the second sub optical signal matches the output port 1 (the first output port). For example, the transmission delay between the first sub optical signal and the second sub optical signal is related to the hardware design of the j-th splitter 722. In addition, the optical power difference between the first sub optical signal and the second sub optical signal can refer to the first optional implementation manner of the foregoing S430, which is not described herein.

[0200] The optical port 1 is configured to transmit the combined service optical signal to an optical network terminal device (such as an OLT). For example, after the first splitter 710 receives the combined service optical signal, the first splitter 710 forwards the combined service optical signal to the OLT through the input port.

[0201] The above embodiment describes the transmission process of the service optical signal in combination with the optical ports in the i-th splitter 721 and the j-th splitter 722. The following example describes the optical path of the first service sub optical signal and the second service sub optical signal by taking the transmission path of the sub optical signal as an example.

[0202] For example, the optical path of the first sub optical signal includes: the first sub optical signal passes through the optical port 4, the optical port 2, the optical port 1, the first splitter 710, and the input port, and then reaches the OLT.

[0203] For another example, the optical path of the second sub optical signal includes: the second sub optical signal passes through the optical port 5, the optical port 3, the optical port 1, the first splitter 710, and the input port, and then reaches the OLT.

[0204] In the signal transmission direction from the ONU 1 to the OLT, the optical port 6 is the input optical port of the j-th splitter, the optical port 4 and the optical port 5 are the output optical ports of the j-th splitter, the optical port 1 is the output optical port of the i-th splitter, and the optical port 2 and the optical port 3 are the input optical ports of the i-th splitter.

[0205] In FIG. 7, the input port in the ODN device is close to the optical port 1 (the first optical port) and far away from the optical port 6 (the sixth optical port). However, in some optional implementation manners, the input port in the ODN device is close to the optical port 6 (the sixth optical port) and far away from the optical port 1 (the first optical port), that is, the positions of the i-th splitter and the j-th splitter are interchanged.

[0206] In FIG. 7, taking the signal transmission direction from ONU 1 to OLT as an example, the input port of the ODN device is connected to the light outlet of the first-level optical splitter 710, and one of the multiple light inlets of the first-level optical splitter 710 is connected to the light port 1 (first light port). However, in some feasible cases, the first-level optical splitter 710 can also be deployed at other positions in the ODN device, which can be specifically described with reference to the related description of FIG. 8 below, and the present application is not limited in this regard.

[0207] The sub-optical signals are transmitted in the ODN device, but for the connection mode between the light port 2 and the light port 4 and the connection mode between the light port 3 and the light port 5, two optional examples are provided as follows.

[0208] In the first optional example, the light port 2 (second light port) input port 4 (fourth light port), and the light port 3 (third light port) input port 5 (fifth light port). That is, there is no other optical splitter between the i-th level optical splitter 721 and the j-th level optical splitter 722, and the light port 2 is directly connected to the light port 4, and the light port 3 is directly connected to the light port 5.

[0209] In the second optional example, one or more other optical splitters can be further included between the i-th level optical splitter 721 and the j-th level optical splitter 722.

[0210] The structure of the ODN device is further described below, taking the ODN device not including the first-level optical splitter 710 and one optical splitter being included between the i-th level optical splitter 721 and the j-th level optical splitter 722 as an example.

[0211] FIG. 8 is a structural schematic diagram of an ODN device provided by the present application, and the one or more optical splitters include a first optical splitter 731 and a second optical splitter 732 at the same level.

[0212] For example, the optical splitters at the same level in the ODN device refer to that the number of optical splitters through which the multiple optical signals transmitted from the optical transmitting end are the same before the multiple optical signals reach the optical receiving end.

[0213] For another example, the optical splitters at the same level in the ODN device refer to that the number of optical splitters through which the multiple optical signals reaching the same optical receiving end are the same.

[0214] For example, the optical transmitting end refers to the ONU 1, and the optical receiving end refers to the OLT; or, the optical transmitting end refers to the OLT, and the optical receiving end refers to the ONU 1. It should be noted that the above two examples are only exemplary descriptions of the “optical splitters at the same level” provided by the present embodiment, and should not be construed as a limitation of the present application.

[0215] Please refer to Fig. 8, the first optical splitter 731 is a 1 :M optical splitter, which comprises a first in-out optical port and M transmission optical ports. M≥2 and M is a positive integer. For example, the first sub optical signal passes through the optical port 4 (the fourth optical port), the first transmission optical port of the M transmission optical ports, the first in-out optical port and reaches the optical port 2 (the second optical port).

[0216] The second optical splitter 732 is a 1 :N optical splitter, which comprises a second in-out optical port and N transmission optical ports. N≥2 and N is a positive integer. For example, the second sub optical signal passes through the optical port 5 (the fifth optical port), the second transmission optical port of the N transmission optical ports, the second in-out optical port and reaches the optical port 3 (the third optical port).

[0217] In one possible example, M≠N, i.e. the first optical splitter 731 and the second optical splitter 732 are two different optical splitters. As shown in Fig. 8, M=6 and N=5.

[0218] In another possible example, M=N, i.e. the first optical splitter 731 and the second optical splitter 732 are the same optical splitter. For example, M=N=2. As shown in Fig. 9, which is a structural schematic diagram of an ODN device provided by the present application, the first optical splitter 731 and the second optical splitter 732 are both 1 :2 optical splitters.

[0219] In Fig. 9, the jth-stage optical splitter 722 splits the service optical signal from the ONU 1 into a first sub optical signal and a second sub optical signal.

[0220] The first sub optical signal sent by the jth-stage optical device 722 is transmitted to the ith-stage optical splitter 721 through the first optical splitter 731.

[0221] The second sub optical signal sent by the jth-stage optical device 722 is transmitted to the ith-stage optical splitter 721 through the second optical splitter 732.

[0222] The first sub optical signal and the second sub optical signal pass through different optical splitters respectively and then are combined into a combined service optical signal at the ith-stage optical splitter 721.

[0223] The optical paths of the first sub optical signal and the second sub optical signal obtained in Fig. 9 are exemplarily described below in combination with the positions of the optical ports in the ith-stage optical splitter 721 and the jth-stage optical splitter 722 shown in Fig. 7: the first sub optical signal passes through the optical port 4, the first optical splitter 731, the optical port 2 and reaches the ith-stage optical splitter 721; the second sub optical signal passes through the optical port 5, the second optical splitter 732, the optical port 2 and reaches the ith-stage optical splitter 721.

[0224] It is worth noting that Figure 9 is only an example of a 1:2 optical splitter provided by the present embodiment, and should not be construed as a limitation of the present application. There can be more stages of optical splitters (such as optical splitters, wavelength division multiplexers, etc.) between the i-th stage optical splitter 721 and the j-th stage optical splitter 722, or there can be no other optical splitters between the i-th stage optical splitter 721 and the j-th stage optical splitter 722 (as in the example provided in Figure 7), which is not limited by the present application.

[0225] In addition, in Figure 9, the i-th stage optical splitter 721 and the input port also include other optical splitters, such as a plurality of 1:2 optical splitters cascaded, which can be used to implement the function of the first stage optical splitter 710 in the aforementioned Figure 7, i.e., to forward the service optical signal transmitted in the optical port 1 to the OLT. For the specific implementation of using a plurality of 1:2 optical splitters in a tree shape to implement a 1:N optical splitter, please refer to the description of the prior art, which will not be repeated here. Considering that the optical communication function of the 1:N optical splitter can be realized by a tree structure of multiple stages of 1:2 optical splitters, each 1:2 optical splitter in the first stage optical splitter 710 can expand the number of input ports from one to 2^ k , k is the number of the last stage of the plurality of 1:2 optical splitters cascaded. Among them, one of the 2^ k transmission optical ports is connected to the optical port 1 (first optical port) of the i-th stage optical splitter 721.

[0226] Corresponding to the structure design between the aforementioned i-th stage optical splitter 721 and the input port, there can also be one or more optical splitters between the j-th stage optical splitter 722 and the output port 1 (first output port), which are used to transmit the service optical signal from the ONU 1 to the optical port 6 (sixth optical port). The specific implementation of the one or more optical splitters can also be seen in the aforementioned first stage optical splitter 710 in Figure 7, or in the description of the plurality of 1:2 optical splitters cascaded between the i-th stage optical splitter 721 and the input port in Figure 9, which will not be repeated here.

[0227] As can be seen from the above Figures 7 to 9, in Figures 7 and 8, the service optical signal is split and combined in the main optical channel (located in the preceding low-order optical splitter) of the optical distribution network (ODN device), and the difference between Figures 8 and 7 is that in Figure 7, the output port label (output port serial number) is formed by splitting / combining the branch output port and adding a delay to one of them, and in Figure 8, the ODN device main trunk is first split by 1:2, and then each of the two branches is split by 1:M and 1:N, and the two branches are paired to add transmission delay and combine light.

[0228] Compared with the schemes in FIG. 7 and FIG. 8, the light splitting process in FIG. 9 is performed after a plurality of light splitters in cascade, that is, as long as the i-th light splitter and the j-th light splitter can perform light splitting and light combining operations in the process of a service optical signal, respectively, no matter whether the i-th light splitter and the j-th light splitter are close to an optical network terminal device (or an optical network unit) or the i-th light splitter and the j-th light splitter are at a middle position of the ODN device, the i-th light splitter and the j-th light splitter can assist in implementing the output port identification method provided in the embodiments of the present application, that is, the j-th light splitter for light splitting and the i-th light splitter for light combining can be deployed at any one of the plurality of light splitters in the ODN device.

[0229] It is worth noting that, on the basis of the embodiments provided in FIG. 7 to FIG. 9 above, as long as the i-th light splitter and the j-th light splitter can be used to implement the functions of light splitting and light combining, respectively, the ODN device containing the i-th light splitter and the j-th light splitter should be within the protection scope of the present application, and the present application does not repeat the more settable positions of the i-th light splitter and the j-th light splitter in the ODN device.

[0230] The first and second optional implementation manners above respectively illustrate the output port identification method provided in the embodiments of the present application based on the port features including the optical power difference between the two sub-optical signals and the transmission delay between the two sub-optical signals. The embodiments of the present application further provide another implementation manner, which is further illustrated below with reference to the accompanying drawings.

[0231] In the third optional implementation manner, the port feature includes an encoding bit composed of bit values corresponding to the transmission delay between different sub-optical signals.

[0232] FIG. 7 to FIG. 9 above exemplarily illustrate how to achieve the transmission delay between different sub-optical signals based on the structure design of the ODN device, and the specific manner of indicating the output port of the ODN device to which the ONU is connected based on the transmission delay is further provided below based on FIG. 7, as shown in FIG. 10, which is a structure diagram of an ODN device provided in the present application.

[0233] The α-th light splitter 723 has an optical port 7 (seventh optical port), an optical port 8 (eighth optical port), and an optical port 9 (ninth optical port).

[0234] The β-th light splitter 724 has an optical port 10 (tenth optical port), an optical port 11 (eleventh optical port), and an optical port 12 (twelfth optical port), and the optical port 12 (twelfth optical port) corresponds to an output port 1 (first output port).

[0235] optical port 12 (twelfth optical port), configured to receive the combined service optical signal. For example, the combined service optical signal refers to the optical signal sent by the optical port 1 in the aforementioned i-th optical splitter 721.

[0236] the third optical signal and the fourth optical signal. It is worth noting that the "secondary splitting" here is described in comparison with the splitting of the service optical signal by the i-th optical splitter, that is, the β-th optical splitter 724 splits the combined service optical signal received by the optical port 12. However, in some feasible cases, the service optical signal can be split and combined in other optical splitters, and the "secondary splitting" should not be understood as a limitation of the embodiments of the present application.

[0237] optical port 10 (tenth optical port), configured to send the third optical signal to the optical port 8 (eighth optical port).

[0238] optical port 11 (eleventh optical port), configured to send the fourth optical signal to the optical port 9 (ninth optical port).

[0239] the third optical signal and the fourth optical signal to obtain a secondary combined service optical signal.

[0240] optical port 7 (seventh optical port), configured to send the secondary combined service optical signal.

[0241] In the secondary combined service optical signal, the port characteristic between the first optical signal and the second optical signal indicates a first bit value (first bit value or bit_1), the port characteristic between the third optical signal and the fourth optical signal indicates a second bit value (second bit value or bit_2), and the encoding bits containing the first bit value and the second bit value indicate a first output port.

[0242] Taking the port characteristic between the first optical signal and the second optical signal as the transmission time delay between the first optical signal and the second optical signal, and the port characteristic between the third optical signal and the fourth optical signal as the transmission time delay between the third optical signal and the fourth optical signal as an example, the encoding bits containing the first bit value and the second bit value are exemplarily described below in combination with the output port 1 to the output port 4 provided in Table 1 and FIG. 10.

[0243] Table 1

[0244] The output port sequence number can also be referred to as an output port identifier, an output port label, a port identifier, a port label, or label information of an output port, and the present application does not limit the same.

[0245] bit x = 0, x = 1 or 2, means that the group of optical splitters corresponding to the bit x has not processed the two sub optical signals in the optical signal with delay; bit x = 1, x = 1 or 2, means that the group of optical splitters corresponding to the bit x has processed the two sub optical signals in the optical signal with delay.

[0246] Alternatively, bit x = 0, x = 1 or 2, means that the group of optical splitters corresponding to the bit x has processed the two sub optical signals in the optical signal with delay, and the optical path difference corresponding to the transmission delay between the two sub optical signals is a first value; bit x = 1, x = 1 or 2, means that the group of optical splitters corresponding to the bit x has processed the two sub optical signals in the optical signal with delay, and the optical path difference corresponding to the transmission delay between the two sub optical signals is a second value. The optical path difference means the difference between the optical paths of two beams of light, and the optical path is the product of the geometric path of light propagation and the refractive index of the medium.

[0247] The first value and the second value can be preset or adjusted according to the user's needs.

[0248] For example, the first value and the second value are different.

[0249] In one possible case, the first value is greater than the second value. For example, the first value is 4 cm, and the second value is 2 cm.

[0250] In another possible case, the first value is less than the second value. For example, the first value is 2 cm, and the second value corresponds to a transmission delay of 3 cm.

[0251] In this embodiment, the encoding bit containing the first bit value and the second bit value can also be referred to as bit information, encoding bit information or other names. Table 1 above is only an example of the information provided in this embodiment in conjunction with FIG. 10, and should not be understood as a limitation of the information provided by the present embodiment using the transmission delay to indicate the output port. The encoding bit (encoding bit) containing the first bit value and the second bit value can include not only two bits, but also a larger number of bits (such as k bits), that is, k bits are used to describe each output port. Take k = 4 as an example, as shown in Table 2.

[0252] Table 2

[0253] Wherein, one bit in the encoding bit corresponds to a set of delay optical splitters, such as bit_1 corresponds to the i-th splitter and the j-th splitter in the foregoing embodiment, bit_2 corresponds to the a-th splitter and the b-th splitter in the foregoing embodiment, and the specific implementation of other bits can refer to the related description of the i-th splitter, the j-th splitter, the a-th splitter and the b-th splitter in the foregoing embodiment, which is not described here.

[0254] It is worth noting that the above Figure 10 is illustrated by taking the optical signal transmission process between the OLT and the ONU 1 as an example, and the OLT and other ONUs can also be designed and implemented in a similar manner as described in the above Figures 7 to 10, the difference is that the port characteristics corresponding to different ONUs are different, which is not described here.

[0255] In combination with the first to third optional implementation manners, it can be seen that the encoding bits representing the transmission delay or multiple transmission delays of the same optical signal are realized by adding splitters in the ODN device to describe the output ports of the ODN device, and in some optional embodiments, the ODN device can also integrate the above functions in the existing splitters, such as adding a reflective end face in the optical waveguide corresponding to the optical channel, to perform light combining and splitting on the same optical signal. The specific implementation of the reflective end face is described below with reference to Figure 11, which is a structural schematic diagram of an ODN device provided by the present application.

[0256] In Figure 11, the optical distribution network (ODN device) includes an optical waveguide 740, which can be used to provide the optical channel 1 in the embodiment shown in Figure 4. In terms of structural design, the optical waveguide 740 includes a first reflective end face 741 close to the input port and a second reflective end face 742 away from the input port.

[0257] Wherein, the optical waveguide refers to a medium device that guides the propagation of broadcast therein, also known as a medium optical waveguide. The optical waveguide can be divided into two categories: integrated optical waveguide and cylindrical optical waveguide. The integrated optical waveguide includes planar (thin film) medium optical waveguide and strip-shaped medium optical waveguide, etc., and the integrated optical waveguide is usually part of an optoelectronic integrated device (or system). The cylindrical optical waveguide may, for example, be an optical fiber. In hardware implementation, the optical waveguide is a guiding structure for transmitting optical frequency electromagnetic waves composed of optically transparent medium (such as quartz glass). The transmission principle of the optical waveguide is different from that of the metal closed waveguide. On the interface between different refractive index media, the total reflection of electromagnetic waves makes the light wave propagate in the waveguide and its surrounding limited area.

[0258] The two reflective end faces have different functions in different optical signal transmission directions. The following describes the two signal transmission directions in combination with FIG. 11, that is, the transmission of service optical signals from the ONU 1 to the OLT and the transmission of service optical signals from the OLT to the ONU 1.

[0259] In the signal transmission direction 1 shown in FIG. 11, the service optical signals are emitted from the ONU 1 and finally arrive at the OLT. The service optical signals are split at the second reflective end face 742 and combined at the first reflective end face 741. The first sub-optical signal is obtained by the service optical signals of the ONU 1 penetrating the second reflective end face 742 and the first reflective end face 741, and the second sub-optical signal is obtained by the service optical signals of the ONU 1 penetrating the second reflective end face 742, being reflected by the first reflective end face 741, being reflected by the second reflective end face 742, and penetrating the first reflective end face 741.

[0260] In the signal transmission direction 2 shown in FIG. 11, the service optical signals are emitted from the OLT and finally arrive at the ONU 1. The service optical signals are split at the first reflective end face 741 and combined at the second reflective end face 742. The first sub-optical signal is obtained by the service optical signals of the OLT penetrating the first reflective end face 741 and the second reflective end face 742, and the second sub-optical signal is obtained by the service optical signals of the OLT penetrating the first reflective end face 741, being reflected by the second reflective end face 742, being reflected by the first reflective end face 741, and penetrating the second reflective end face 742.

[0261] Whether it is the signal transmission direction 1 or the signal transmission direction 2, the service optical signals can be split at one reflective end face and split at another reflective end face opposite to the one reflective end face, so that there is a transmission time delay between the two sub-optical signals after the combination, which can be used to describe the corresponding output port 1 of the optical waveguide, avoiding the problem of low output port recognition efficiency caused by manual scanning of the two-dimensional code, and being conducive to improving the efficiency of output port recognition. Moreover, the transmission time delay between different sub-optical signals in the same optical waveguide is determined, so that the process of output port recognition is not affected by the aging of the two-dimensional code or the non-standard operation of the maintenance personnel, and the accuracy of the output port recognition is improved.

[0262] Unlike the combination and splitting operation in the ODN device in FIGS. 7 to 10, the embodiment provided in FIG. 11 proposes that two reflective end faces can be integrated in the ODN device, and one of the optical signals is reflected to form a delay signal superposition between the two sub-optical signals, that is, when the optical signal passes through the first reflective end face, part of the light is transmitted, and the other part of the light is reflected by the first reflective end face. After two reflections, the reflected sub-optical signal is transmitted in the original path direction after being delayed.

[0263] In FIG. 11, the first reflective end face 741 and the second reflective end face 742 form a beam splitter, and other beam splitters can also be included in the optical waveguide 740, each beam splitter including two oppositely arranged reflective end faces, and each beam splitter can be used to perform one-time delay (beam splitting + beam combining) on the service optical signal. In the case where multiple beam splitters (each beam splitter including two oppositely arranged reflective end faces) are included in the optical waveguide 740, each beam splitter can be used to perform one-time delay on the service optical signal, each beam splitter corresponds to one bit value, and multiple bit values corresponding to multiple beam splitters form a coded bit, and the coded bit is used to describe the output port 1 corresponding to the optical waveguide 740. For specific implementation of the coded bit, refer to the related description of the foregoing Table 1 and Table 2, which will not be described here.

[0264] The above, in combination with the accompanying drawings, the first to third alternative implementations, the information included in the port characteristics between different sub-optical signals is exemplarily described, but should not be understood as the port characteristics can only be represented by one kind of information, and the port characteristics can also be a combination of two or more kinds of information.

[0265] In the fourth alternative implementation, the port characteristics include: an optical power difference between different sub-optical signals, and a transmission delay between different sub-optical signals.

[0266] Exemplarily, the serial number of the output port includes: first indication information and second indication information. The first indication information is determined according to the optical power difference between different sub-optical signals, and the second indication information is determined according to the transmission delay between different sub-optical signals.

[0267] For example, the serial number of the output port T = T1-T2, T1 is the first indication information, and T2 is the second indication information. For example, the serial number of the output port is 1-12, where T1 = 1 and T2 = 12.

[0268] For another example, the serial number of the output port T = T2-T1, T1 is the first indication information, and T2 is the second indication information. For example, the serial number of the output port is 2-13, where T1 = 13 and T2 = 2.

[0269] In the fifth alternative implementation, the port characteristics include: an optical power difference between different sub-optical signals, and a coded bit composed of a position corresponding to the transmission delay.

[0270] Exemplarily, the serial number of the output port includes: first indication information and third indication information. The first indication information is determined according to the optical power difference between different sub-optical signals, and the third indication information is determined according to the coded bit composed of the position corresponding to the transmission delay.

[0271] For example, the output port serial number T = T1-T3, T1 is the first indication information, and T3 is the third indication information. For example, the output port serial number is 1-12, wherein T1 = 1 and T3 = 12.

[0272] For example, the output port serial number T = T3-T1, T1 is the first indication information, and T3 is the third indication information. For example, the output port serial number is 2-13, wherein T1 = 13 and T3 = 2.

[0273] In a sixth optional implementation, the port characteristics include: transmission time delays between different sub-optical signals, and encoding bits composed of positions corresponding to the transmission time delays.

[0274] For example, the output port serial number includes: the second indication information and the third indication information. The second indication information is determined according to the transmission time delays between different sub-optical signals, and the third indication information is determined according to the encoding bits composed of positions corresponding to the transmission time delays.

[0275] For example, the output port serial number T = T2-T3, T2 is the second indication information, and T3 is the third indication information. For example, the output port serial number is 1-12, wherein T1 = 2 and T3 = 12.

[0276] For example, the output port serial number T = T3-T2, T2 is the second indication information, and T3 is the third indication information. For example, the output port serial number is 2-13, wherein T2 = 13 and T3 = 2.

[0277] In a seventh optional implementation, the port characteristics include: optical power difference values between different sub-optical signals, transmission time delays between different sub-optical signals, and encoding bits composed of positions corresponding to the transmission time delays.

[0278] For example, the output port serial number includes: the first indication information (T1), the second indication information (T2), and the third indication information (T3). The first indication information is determined according to the optical power difference values between different sub-optical signals, the second indication information is determined according to the transmission time delays between different sub-optical signals, and the third indication information is determined according to the encoding bits composed of positions corresponding to the transmission time delays.

[0279] For example, the output port serial number (output port label) can be organized in the manner shown in Table 3.

[0280] Table 3

[0281] It is worth noting that the organization of the output port number in the above fourth to seventh optional implementation manners is only an example provided by the embodiment and should not be construed as a limitation of the present application. For the specific implementation of the different port features in the fourth to seventh optional implementation manners, refer to the first to third optional implementation manners described above, which will not be repeated here.

[0282] In addition, in the embodiments shown in FIGS. 7 to 11, the implementation of the port features and the implementation of the ODN device between the OLT and the ONU 1 are described by taking the transmission of the service optical signal from the ONU 1 to the OLT as an example. Based on FIGS. 4 to 11, the present embodiment further provides an implementation of restoring the network topology based on the result of the output port identification, as shown in FIG. 12, which is a flowchart of a third output port identification method provided by the present application. After S440 described above, the output port identification method provided by the present embodiment can further include the following S450 and S460.

[0283] S450, the OLT generates the port mapping information of the ONU 1.

[0284] The port mapping information of the ONU 1 includes the identification information of the ONU 1 and the identification of the output port 1 (the first output port). The identification information of the ONU 1 includes at least one of the SN of the ONU 1 and the ID of the ONU 1, and the identification of the output port 1 is "1" or "00" or "01", etc.

[0285] S460, after the OLT obtains the plurality of port mapping information of the plurality of optical network units (ONUs), the OLT generates the topology information according to the plurality of port mapping information.

[0286] The topology information includes the output port adopted by each optical network unit in the optical distribution network device to connect to the ODN device.

[0287] In the present embodiment, after the optical line termination device (OLT) identifies the output port adopted by each of the plurality of optical network units (ONUs), the OLT can generate the topology information (network topology) of the optical distribution network according to the output port adopted by each of the plurality of optical network units (ONUs), and quickly locate the optical network units (ONUs) in the case of failure of some of the optical network units (ONUs), which is conducive to improving the maintenance efficiency of the optical distribution network.

[0288] As in the corresponding embodiments of the foregoing FIG. 4 to FIG. 12, no additional transceiver device needs to be added in the optical transmitting end (such as OLT) and the optical receiving end (such as ONU 1), and the optical transmitting end and the optical receiving end can realize the output port identification process by multiplexing the existing optical signal transceiver device (such as the wavelength division multiplexer, the laser and the photodetector in FIG. 3), use the port characteristics between different sub-optical signals to describe the output port, and improve the accuracy of the output port identification while reducing the cost caused by the need to add special devices in the optical transmitting end and the optical receiving end.

[0289] Moreover, the optical splitter is added in the optical distribution network (ODN device) (such as the related embodiments of FIG. 7 to FIG. 10) or integrated in the optical distribution network (ODN device) (such as the related embodiments of FIG. 11), and the ODN device can provide transmission channels (such as the foregoing optical channel 1 to optical channel 4) for multiple ONUs or different users at the same time, and only a limited hardware cost needs to be added in the ODN device to solve the problem of low efficiency of the output port identification caused by the need for manual scanning of the two-dimensional code, and also solve the problem of reduced accuracy of the output port identification caused by the aging of the two-dimensional code or the non-standard operation of the installation and maintenance personnel.

[0290] Corresponding to the optical line terminal device (OLT) performing the output port identification method provided in the present application, in other optional cases, the optical network unit can also perform the output port identification method provided in the present application, as shown in FIG. 13, which is a flowchart of a fourth output port identification method provided in the present application. The OLT and the ONU 1 are connected through the optical distribution network (ODN device), and the hardware implementation of the ONU 1 and the OLT can refer to the related contents of the foregoing FIG. 2 to FIG. 4, and the specific implementation of the ODN device can refer to the related contents of the foregoing FIG. 6A to FIG. 11, which will not be repeated here.

[0291] Referring to FIG. 13, the output port identification method provided in the embodiments of the present application includes the following steps S510 to S540.

[0292] S510, the OLT sends a service optical signal to the ONU 1.

[0293] Corresponding to the process of S510, the ONU 1 receives the service optical signal of the OLT.

[0294] The service optical signal can be the request optical signal in the foregoing S410, or other optical signals transmitted between the OLT and the ONU 1, which is not limited in the present application.

[0295] The service optical signal includes a first sub-optical signal and a second sub-optical signal.

[0296] S520, the ONU 1 parses the service optical signal to obtain a transmission delay between the first sub optical signal and the second sub optical signal.

[0297] The port delay is a kind of content contained in a port feature between the first sub optical signal and the second sub optical signal.

[0298] The port feature between the first sub optical signal and the second sub optical signal indicates that the OLT adopts an output port 1 (first output port) to connect the ONU 1 through the ODN device. The port feature includes one or a combination of the following: a transmission delay between the two sub optical signals, an encoding bit composed of a bit value corresponding to the transmission delay, and an optical power difference between the two sub optical signals. For specific information contained in the port feature, refer to the foregoing first to seventh optional implementation manners, which will not be described here.

[0299] S530, the ONU 1 determines port information of the ODN device to which the ONU 1 is connected according to the transmission delay between the first sub optical signal and the second sub optical signal.

[0300] If the port information indicates the first output port (port 1), the port information is also referred to as a port label of the first output port, and specific descriptions can be referred to the foregoing embodiments, which will not be described here.

[0301] S540, the ONU 1 sends a response optical signal to the OLT.

[0302] Corresponding to the process of S530, the OLT receives the response optical signal of the ONU 1.

[0303] The response optical signal includes identification information of the ONU 1 and identification (such as a port label or a port serial number, etc.) of the output port 1 (first output port), and the identification information includes at least one of a serial number SN or an identification ID of the optical network unit.

[0304] In a feasible example, the response optical signal is port mapping information established by the ONU 1 according to the determined output port 1 and the identification information of the ONU 1. For the port mapping information, refer to the foregoing description of FIG. 12, which will not be described here.

[0305] In the embodiment of the present application, the request optical signal sent by the OLT to the ONU is split into two different sub optical signals, and the ONU can determine the output port through which the ONU connects the OLT based on the port characteristics between the two different sub optical signals, avoiding the problem of low efficiency of output port identification caused by manual scanning of the two-dimensional code, and being conducive to improving the efficiency of output port identification. Moreover, since the port characteristics between different sub optical signals are determined, the process of output port identification performed by the ONU will not be affected by the aging of the two-dimensional code or the non-standard operation of the installation and maintenance personnel, which is conducive to improving the accuracy of output port identification by the ONU.

[0306] In the transmission process of the service optical signal in the optical distribution network (ODN device) in S510, the following will be described in conjunction with the drawings.

[0307] In the case of the service optical signal being sent from the OLT to the ONU 1, the optical port 1 is configured to receive the service optical signal of the OLT. The i-th optical splitter 721 is configured to split the service optical signal to obtain a first sub optical signal and a second sub optical signal. The optical port 2 is configured to send the first sub optical signal to the optical port 4. The optical port 3 is configured to send the second sub optical signal to the optical port 5.

[0308] The j-th optical splitter 722 is configured to combine the first sub optical signal and the second sub optical signal to obtain a combined service optical signal. In the combined service optical signal, the port characteristics between the first sub optical signal and the second sub optical signal match the output port 1 (the first output port), and the port characteristics include one or a combination of the following: the transmission delay between the two sub optical signals, the encoding bits composed of the bit values corresponding to the transmission delay, and the optical power difference between the two sub optical signals. The optical port 6 is configured to send the combined service optical signal to the ONU 1.

[0309] In the signal transmission direction from the OLT to the ONU 1, the optical port 1 is the first input optical port of the i-th optical splitter, the optical port 2 is the first output optical port of the i-th optical splitter, the optical port 3 is the second output optical port of the i-th optical splitter, the optical port 4 is the second input optical port of the j-th optical splitter, the optical port 5 is the third input optical port of the j-th optical splitter, and the optical port 6 is the third output optical port of the j-th optical splitter.

[0310] In FIG. 7, the optical port 2 input port 4, and the optical port 3 input port 5. For the splitting and combining process of the service optical signal in the ODN device and other possible examples, reference can be made to the description of FIG. 7 above, which will not be repeated here.

[0311] In addition, one or more splitters are arranged between the i-th splitter 721 and the j-th splitter 722. As shown in FIG. 8, between the i-th splitter 721 and the j-th splitter 722, there are a first splitter 731 and a second splitter 732 at the same level. For example, the first sub-optical signal described above reaches the optical port 4 via the optical port 2, a first transmission optical port of the M transmission optical ports, and the first in-out optical port; and the second sub-optical signal described above reaches the optical port 5 via the optical port 3, a second transmission optical port of the N transmission optical ports, and the second in-out optical port. For more information about the first splitter 731 and the second splitter 732, please refer to the foregoing description of FIG. 8, which will not be repeated here.

[0312] It is worth noting that when the ODN device between the OLT and the ONU 1 is in the structure shown in FIG. 9, the transmission direction of the service optical signal is opposite to the direction of the service optical signal sent by the foregoing ONU 1 to the OLT, which will not be repeated here.

[0313] In the process of sending the service optical signal by the foregoing OLT to the ONU 1, the ODN device can perform multiple delay operations (splitting and combining operations) on the service optical signal, and use the encoding bits composed of the bit values corresponding to the transmission delays between different sub-optical signals to describe the output ports. Correspondingly, please refer to FIG. 14, which is a structural schematic diagram of an ODN device provided by the present application. In addition to the structure of the ODN device described in FIG. 7, the optical distribution network (ODN device) shown in FIG. 14 further includes a second set of delay splitters, which includes an α-th splitter 723 and a β-th splitter 724. The α-th splitter 723 has an optical port 7, an optical port 8, and an optical port 9. The β-th splitter 724 has an optical port 10, an optical port 11, and an optical port 12, and the optical port 12 corresponds to an output port 1 (a first output port).

[0314] After the service optical signal sent by the OLT reaches the input port and the first splitter 710, it reaches the optical port 1.

[0315] The i-th splitter 721 splits the service optical signal to obtain a first sub-optical signal and a second sub-optical signal. The first sub-optical signal is sent to the optical port 4 via the optical port 2, and the second sub-optical signal is sent to the optical port 5 via the optical port 3.

[0316] The j-th splitter 722 combines the first sub-optical signal and the second sub-optical signal to obtain a combined service optical signal, and sends the combined service optical signal to the optical port 7 via the optical port 6.

[0317] The optical port 7 is configured to receive the combined service optical signal. The α-level optical splitter 723 is configured to split the combined service optical signal to obtain a third sub optical signal and a fourth sub optical signal. The optical port 8 is configured to transmit the third sub optical signal to the optical port 10, and the optical port 9 is configured to transmit the fourth sub optical signal to the optical port 11.

[0318] The β-level optical splitter 724 is configured to combine the third sub optical signal and the fourth sub optical signal to obtain a second combined service optical signal. The optical port 12 is configured to transmit the second combined service optical signal.

[0319] It is worth noting that in the second combined service optical signal, the port characteristic between the first sub optical signal and the second sub optical signal indicates a first bit value, the port characteristic between the third sub optical signal and the fourth sub optical signal indicates a second bit value, and the encoding bits containing the first bit value and the second bit value indicate the output port 1 (the first output port). For details of the second combined optical signal and optional modes, refer to the related description of the foregoing FIG. 10, which will not be described here.

[0320] The difference between FIG. 14 and FIG. 10 is that the positions of the second set of delay optical splitters are different: in FIG. 10, the second set of delay optical splitters is close to the input port; in FIG. 14, the second set of delay optical splitters is close to the output port 1. Both FIG. 10 and FIG. 14 are examples of an optical channel containing multiple sets of delay optical splitters provided by the embodiments of the present application, and should not be construed as a limitation of the present application. For example, according to different scales or capacities of ODN devices, in some feasible modes, the positions of the first set of delay optical splitters and the second set of delay optical splitters in FIG. 10 and FIG. 14 can be adjusted, and more sets of delay optical splitters can be included in the ODN device, which is not limited by the present application.

[0321] When the ODN device adopts the structure shown in FIG. 14 or FIG. 10, the output port 1 can use different encoding bits to represent, which include the bit values corresponding to the transmission delays between different sub optical signals carrying the same service information output in the output port 1. For details, refer to the related content of the foregoing tables 1 to 3, which will not be described here.

[0322] In a feasible example, if the ODN device adopts an integrated passive optical device to combine and split the service optical signal, the integrated passive optical device can include a first reflective end face close to the input port and a second reflective end face away from the input port. As shown in the signal transmission direction 2 in FIG. 11, the first sub optical signal is obtained by the OLT service optical signal penetrating the first reflective end face 741 and the second reflective end face 742, and the second sub optical signal is obtained by the OLT service optical signal penetrating the first reflective end face 741, reflecting through the second reflective end face 742, reflecting through the first reflective end face 741, and penetrating the second reflective end face 742.

[0323] In another possible example, the ODN device described above can also adopt the structure design of adding passive optical devices + integrated passive optical devices. For example, after one-time splitting / combining of the service optical signals by the i-th passive optical device and the j-th passive optical device, the combined service optical signals are subjected to two-time splitting / splitting by the oppositely arranged reflective end faces. The transmission process of the combined service optical signals in the optical waveguide can refer to the description of FIG. 11, which is not described herein. The two-time splitting / combining corresponds to the same or different transmission delays, and the sequence number (i.e., port information) of the output port is represented by the encoding bits of the bit values of the two transmission delays including the two-time splitting / combining. For details, refer to the related content of the foregoing Tables 1 to 3, which is not described herein.

[0324] It can be understood that, in order to implement the functions in the above-described embodiments, the optical line terminal device and the optical network unit include corresponding hardware structures and / or software modules for performing various functions. Those skilled in the art should easily realize that, in combination with the units and method steps of the examples described in the embodiments disclosed in the present application, the present application can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in hardware or computer software driven hardware depends on the specific application scenario and design constraints of the technical solution.

[0325] As shown in FIG. 15, FIG. 15 is a structural schematic diagram of a port identification apparatus provided by the present application. The port identification apparatus can be an optical line terminal device or an optical network unit, or can be a chip (or chip system) or other components or assemblies that can be arranged in the optical line terminal device or the optical network unit. As shown in FIG. 15, the port identification apparatus 1500 can include a receiving module 1510, a processing module 1520, and a sending module 1530.

[0326] When the port identification apparatus 1500 is used to implement the functions of the optical line terminal device or the OLT in the foregoing embodiments, the sending module 1530 is configured to send a request optical signal, the receiving module 1510 is configured to receive a plurality of groups of service optical signals of a plurality of optical network units, and the processing module 1520 is configured to parse one group of service optical signals of the plurality of groups of service optical signals to obtain identification information of an optical network unit corresponding to the one group of service optical signals and a port feature of the one group of service optical signals, the port feature indicating a first output port of the optical line terminal device to which the optical network unit is connected.

[0327] When the port identification apparatus 1500 is used to implement the functions of the optical network unit or ONU (e.g., ONU 1) in the foregoing embodiments, the receiving module 1510 is configured to receive a service optical signal of the optical network termination device, and the processing module 1520 is configured to parse the service optical signal to obtain a port feature between the first sub optical signal and the second sub optical signal in the service optical signal, the port feature indicating a first output port adopted by the optical network unit to connect the optical network termination device. Optionally, the sending module 1530 is configured to send a response optical signal, the response optical signal carrying identification information of the optical network unit and an identifier of the first output port.

[0328] The port identification apparatus 1500 according to the embodiments of the present application can be implemented by a software module. The port identification apparatus 1500 according to the embodiments of the present application can correspond to the execution of the method described in the embodiments of the present application, and the above and other operations and / or functions of each module in the port identification apparatus 1500 are respectively for implementing the method flow in the foregoing figures, and for brevity, will not be described here.

[0329] It is worth noting that if the port identification apparatus 1500 is implemented by a software module, for example, the software module can be provided to users for use through a cloud service subscription mode, and users can select different subscription levels according to needs; for another example, the software module can also provide enterprise-level customized services with professional domain customization, interface personalization and expansion functions according to the needs of users or enterprises.

[0330] In addition, the port identification apparatus 1500 provided by the present application can also be provided to users as a value-added service, which is not limited by the present application. When the port identification apparatus 1500 is implemented by a software module, the port identification apparatus 1500 can also be embedded into a network topology restoration tool system.

[0331] The port identification apparatus 1500 according to the embodiments of the present application can also be implemented by hardware, such as the hardware refers to the optical network termination device (e.g., OLT) or the optical network unit (e.g., ONU), and the specific implementation of the optical network termination device (e.g., OLT) or the optical network unit (e.g., ONU) can be referred to the description of FIG. 2 and FIG. 3, which will not be described here.

[0332] For example, the optical network termination device (e.g., OLT) includes a processor and a transceiver, the transceiver is configured to send or receive a service optical signal, and the transceiver and the processor are configured to cooperatively implement the functions of the OLT in the foregoing embodiments. In combination with FIG. 3, the functions of the transceiver can be implemented by the photodetector 324, the laser 325 and the wavelength division multiplexer 326, and the functions of the processor can be implemented by the OLT PHY 323 and the OLT MAC 321.

[0333] For example, an optical network unit (e.g., an ONU) includes a processor and a transceiver for transmitting or receiving service optical signals, and the transceiver and the processor are configured to cooperatively implement the functions of the OLT in the foregoing embodiments. In combination with FIG. 3, the functions of the transceiver can be implemented by the photodetector 314, the laser 313, and the wavelength division multiplexer 315, and the functions of the processor can be implemented by the ONU PHY 312 and the ONU MAC 311.

[0334] The processor provided by the embodiments of the present application is one processor, and can also be a collective term of a plurality of processing elements. For example, the processor is one or more central processing units (CPUs), and can also be an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, for example, one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs).

[0335] Optionally, the processor can execute various functions of the port identification apparatus 1500 by running or executing a software program stored in the memory and calling data stored in the memory. In a specific implementation, as an embodiment, the processor can include one or more CPUs. The memory is used to store a software program for implementing the scheme of the present application, and is controlled by the processor to execute, and the specific implementation manner can refer to the method embodiments described above, and details are not described herein. For example, the memory can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, an optical disk storage (including a compact disk, a laser disk, an optical disk, a digital versatile disk, a Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0336] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are performed. The computer can be a general purpose computer, a special purpose computer, a computer network, a network device, a user equipment or other programmable apparatus. The computer programs or instructions can 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 programs or instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center through wired or wireless manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center and the like integrated with one or more available media. The available media can be a magnetic medium, for example, a floppy disk, a hard disk, a magnetic tape; or an optical medium, for example, a digital video disc (digital video disc, DVD); or a semiconductor medium, for example, a solid state disk (solid state drive, SSD).

[0337] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed in the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A port identification method, characterized in that: The method is executed by an optical network unit connected with an optical network termination through an optical distribution network device, and comprises: The optical network unit receives a first sub optical signal and a second sub optical signal from the optical network termination, the first sub optical signal and the second sub optical signal have a transmission time delay therebetween, and the first sub optical signal and the second sub optical signal carry the same service information; The optical network unit determines port information of the optical distribution network device connected with the optical network unit according to the transmission time delay between the first sub optical signal and the second sub optical signal.

2. The method according to claim 1, characterized in that The optical network unit determines port information of the optical distribution network device connected with the optical network unit according to the transmission time delay between the first sub optical signal and the second sub optical signal, comprising: The optical network unit matches the transmission time delay with a port list to determine the port information of the optical distribution network device connected with the optical network unit; the port list comprises a plurality of port characteristics of a plurality of output ports provided by the optical distribution network device, one output port corresponding to one port characteristic.

3. The method according to claim 2, characterized in that The optical network unit stores the port list.

4. The method according to claim 2 or 3, characterized in that The port characteristic of the port information of the optical distribution network device connected with the optical network unit comprises one or a combination of the following: the transmission time delay between the first sub optical signal and the second sub optical signal, the optical power difference between the first sub optical signal and the second sub optical signal, and a coded bit comprising a first bit value, the first bit value being a bit value determined according to the transmission time delay between the first sub optical signal and the second sub optical signal.

5. The method according to any one of claims 1 to 4, characterized in that The optical distribution network device comprises: An input port for receiving a first service optical signal sent by the optical network termination; A processing module for processing the first service optical signal to obtain a first sub optical signal and a second sub optical signal, and sending the first sub optical signal and the second sub optical signal to a first output port, the first service optical signal, the first sub optical signal and the second sub optical signal carrying the same service information; The output port is used for outputting the first sub optical signal and the second sub optical signal.

6. The method according to claim 5, characterized in that The processing module comprises: An optical splitting component for splitting the first service optical signal to obtain a first sub optical signal and a second sub optical signal; An optical combining component for combining the first sub optical signal and the second sub optical signal to obtain a second service optical signal; The first output port is also used for outputting the second service optical signal.

7. The method according to claim 6, characterized in that The optical splitting component comprises an i-th level optical splitter having a first input optical port, a first output optical port and a second output optical port; The optical combining component comprises a j-th level optical splitter having a second input optical port, a third input optical port and a third output optical port; The first input optical port is used for receiving the first service optical signal; The first output optical port is used for sending the first sub optical signal to the second input optical port; The second output optical port is used for sending the second sub optical signal to the third input optical port; The third output optical port is used for sending the second service optical signal.

8. The method according to claim 6 or 7, characterized in that The processing module further comprises: a first optical fiber and a second optical fiber connected between the light splitting component and the light combining component; the first optical fiber is configured to transmit the first sub optical signal; the second optical fiber is configured to transmit the second sub optical signal, and a length difference between the first optical fiber and the second optical fiber indicates a transmission time delay between the first sub optical signal and the second sub optical signal.

9. The method according to any one of claims 6 to 8, characterized in that The processing module further includes one or more groups of delay passive optical devices, each group of delay passive optical devices corresponding to a bit value in the encoded bits of the first output port.

10. The method according to claim 9, characterized in that The one or more groups of delay passive optical devices include a second group of delay passive optical devices. An input port of the second group of delay passive optical devices is configured to receive a second service optical signal. An output port of the second group of delay passive optical devices is configured to process the second service optical signal to obtain a first sub optical signal and a second sub optical signal, and transmit the first sub optical signal and the second sub optical signal to the first output port.

11. The method of claim 5, wherein, The processing module includes a first reflective end face close to the input port and a second reflective end face away from the input port. The first service optical signal passes through the first reflective end face and the second reflective end face to obtain the first sub optical signal. The first service optical signal passes through the first reflective end face, is reflected by the second reflective end face, is reflected by the first reflective end face, and passes through the second reflective end face to obtain the second sub optical signal.

12. The method of any of claims 1-11, wherein: the first sub optical signal and the second sub optical signal have the same optical power; or the first sub optical signal and the second sub optical signal have different optical powers.

13. An optical distribution network device, characterized by comprises: an input port configured to receive a first service optical signal; a processing module configured to process the first service optical signal to obtain a first sub optical signal and a second sub optical signal, and transmit the first sub optical signal and the second sub optical signal to a first output port, the first sub optical signal and the second sub optical signal having a transmission time delay therebetween, the first service optical signal, the first sub optical signal, and the second sub optical signal carrying the same service information; the first output port is configured to output the first sub optical signal and the second sub optical signal.

14. An optical distribution network apparatus according to claim 13, characterised in that, The processing module comprises: a light splitting component configured to split the first service optical signal to obtain a first sub optical signal and a second sub optical signal; a light combining component configured to combine the first sub optical signal and the second sub optical signal to obtain a second service optical signal; the first output port is further configured to output the second service optical signal.

15. An optical distribution network apparatus as claimed in claim 13 or 14, characterised in that, Further comprising: a second output port, a port feature of the second output port being different from a port feature of the first output port.

16. An optical distribution network apparatus according to any one of claims 13-15, characterised in that, The port feature of the first output port includes one or a combination of the following: a transmission time delay between the first sub optical signal and the second sub optical signal, an optical power difference between the first sub optical signal and the second sub optical signal, and an encoded bit containing a first bit value, the first bit value being determined according to the transmission time delay between the first sub optical signal and the second sub optical signal.

17. The optical distribution network device of claim 14, wherein, The light splitting assembly comprises: an i-th light splitter having a first light inlet, a first light outlet and a second light outlet; The light combining assembly comprises: a j-th light splitter having a second light inlet, a third light inlet and a third light outlet; The first light inlet is configured to receive the first service optical signal; The first light outlet is configured to transmit the first sub-optical signal to the second light inlet; The second light outlet is configured to transmit the second sub-optical signal to the third light inlet; The third light outlet is configured to transmit the second service optical signal.

18. An optical distribution network apparatus according to claim 17, characterised in that, The first light outlet is connected to the second light inlet, and the second light outlet is connected to the third light inlet.

19. The optical distribution network device of claim 17, wherein, The light splitting assembly and the light combining assembly are separated by one or more light splitters.

20. An optical distribution network apparatus according to any one of claims 17-19, characterised in that, A difference between a first value of an optical path from the first light outlet to the second light inlet and a second value of an optical path from the second light outlet to the third light inlet indicates a transmission time delay between the first sub-optical signal and the second sub-optical signal.

21. An optical distribution network apparatus according to any one of claims 14, 17-20, wherein, The processing module further comprises: First and second optical fibers connecting the light splitting assembly and the light combining assembly; The first optical fiber is configured to transmit the first sub-optical signal; The second optical fiber is configured to transmit the second sub-optical signal, and a length difference between the first optical fiber and the second optical fiber indicates a transmission time delay between the first sub-optical signal and the second sub-optical signal.

22. An optical distribution network apparatus according to any one of claims 17-21, characterised in that, The processing module further comprises: one or more groups of delay passive optical devices, each group of delay passive optical devices corresponding to a bit value in the encoded bits of the first output port.

23. An optical distribution network apparatus according to claim 22, characterised in that, The one or more groups of delay passive optical devices comprise a second group of delay passive optical devices; An input port of the second group of delay passive optical devices is configured to receive a second service optical signal; An output port of the second group of delay passive optical devices is configured to process the second service optical signal to obtain a first sub-optical signal and a second sub-optical signal, and transmit the first sub-optical signal and the second sub-optical signal to the first output port.

24. The optical distribution network device of claim 13, wherein, The processing module comprises: a first reflective end face close to the input port and a second reflective end face away from the input port; The first service optical signal passes through the first reflective end face and the second reflective end face to obtain the first sub-optical signal; The first service optical signal passes through the first reflective end face, is reflected by the second reflective end face, is reflected by the first reflective end face, and passes through the second reflective end face to obtain the second sub-optical signal.

25. The optical distribution network device of any one of claims 13-24, wherein: optical powers of the first sub-optical signal and the second sub-optical signal are the same; or optical powers of the first sub-optical signal and the second sub-optical signal are different.

26. The optical distribution network device of any one of claims 13-25, wherein: the first output port is further configured to receive a third service optical signal; The processing module is further configured to process the third service optical signal to obtain a third sub-optical signal and a fourth sub-optical signal, and send the third sub-optical signal and the fourth sub-optical signal to the input port, wherein the third sub-optical signal and the fourth sub-optical signal have a transmission time delay therebetween, and the third service optical signal, the third sub-optical signal and the fourth sub-optical signal carry the same service information. The input port is further configured to output the third sub-optical signal and the fourth sub-optical signal.

27. A port identification method, comprising: The method is performed by an optical network termination device, the optical network termination device is connected to a plurality of optical network units through an optical distribution network device, and the method comprises: The optical network termination device receives a plurality of groups of service optical signals from the plurality of optical network units, one group of service optical signals corresponds to one optical network unit of the plurality of optical network units, and the one group of service optical signals comprises a first sub-optical signal and a second sub-optical signal carrying the same service information, wherein the first sub-optical signal and the second sub-optical signal have a transmission time delay therebetween; The optical network termination device determines a first output port of the optical distribution network device to which the one optical network unit is connected according to the transmission time delay between the first sub-optical signal and the second sub-optical signal.

28. The method of claim 27, wherein, The method further comprises: The optical network termination device generates port mapping information of the one optical network unit, and the port mapping information of the one optical network unit comprises port information of the first output port and identification information of the one optical network unit.

29. The method of claim 28, wherein, The identification information of the one optical network unit comprises a serial number (SN) of the one optical network unit and / or an identification (ID) of the one optical network unit.

30. The method of claim 28 or 29, wherein, The method further comprises: The optical network termination device acquires port mapping information of each optical network unit of the plurality of optical network units; The optical network termination device generates topology information of the optical distribution network device according to the plurality of port mapping information of the plurality of optical network units, and the topology information comprises port information of the optical distribution network device to which the plurality of optical network units are connected.

31. The method of any one of claims 27-30, wherein, The port characteristics of the first output port comprise one or a combination of the following: the transmission time delay between the first sub-optical signal and the second sub-optical signal, the optical power difference between the first sub-optical signal and the second sub-optical signal, and a coding bit comprising a first bit value, wherein the first bit value is determined according to the transmission time delay between the first sub-optical signal and the second sub-optical signal.

32. The method of any one of claims 27-31, wherein, The optical distribution network device comprises: A first output port configured to receive a first service optical signal sent by the one optical network unit; A processing module configured to process the first service optical signal to obtain a first sub-optical signal and a second sub-optical signal, and send the first sub-optical signal and the second sub-optical signal to an input port, wherein the first service optical signal, the first sub-optical signal and the second sub-optical signal carry the same service information; The input port is further configured to output the first sub-optical signal and the second sub-optical signal.

33. An optical network unit, comprising: The method is performed by an optical network termination device, the optical network termination device is connected to a plurality of optical network units through an optical distribution network device, and the method comprises: The optical network termination device receives a plurality of groups of service optical signals from the plurality of optical network units, one group of service optical signals corresponds to one optical network unit of the plurality of optical network units, and the one group of service optical signals comprises a first sub-optical signal and a second sub-optical signal carrying the same service information, wherein the first sub-optical signal and the second sub-optical signal have a transmission time delay therebetween; The optical network termination device determines a first output port of the optical distribution network device to which the one optical network unit is connected according to the transmission time delay between the first sub-optical signal and the second sub-optical signal. The method further comprises: The optical network termination device generates port mapping information of the one optical network unit, and the port mapping information of the one optical network unit comprises port information of the first output port and identification information of the one optical network unit. The identification information of the one optical network unit comprises a serial number (SN) of the one optical network unit and / or an identification (ID) of the one optical network unit. The method further comprises: The optical network termination device acquires port mapping information of each optical network unit of the plurality of optical network units; The optical network termination device generates topology information of the optical distribution network device according to the plurality of port mapping information of the plurality of optical network units, and the topology information comprises port information of the optical distribution network device to which the plurality of optical network units are connected. The port characteristics of the first output port comprise one or a combination of the following: the transmission time delay between the first sub-optical signal and the second sub-optical signal, the optical power difference between the first sub-optical signal and the second sub-optical signal, and a coding bit comprising a first bit value, wherein the first bit value is determined according to the transmission time delay between the first sub-optical signal and the second sub-optical signal. The optical distribution network device comprises: A first output port configured to receive a first service optical signal sent by the one optical network unit; A processing module configured to process the first service optical signal to obtain a first sub-optical signal and a second sub-optical signal, and send the first sub-optical signal and the second sub-optical signal to an input port, wherein the first service optical signal, the first sub-optical signal and the second sub-optical signal carry the same service information; The input port is further configured to output the first sub-optical signal and the second sub-optical signal. The method is performed by an optical network termination device, the optical network termination device is connected to a plurality of optical network units through an optical distribution network device, and the method comprises: The optical network termination device receives a plurality of groups of service optical signals from the plurality of optical network units, one group of service optical signals corresponds to one optical network unit of the plurality of optical network units, and the one group of service optical signals comprises a first sub-optical signal and a second sub-optical signal carrying the same service information, wherein the first sub-optical signal and the second sub-optical signal have a transmission time delay therebetween; The optical network termination device determines a first output port of the optical distribution network device to which the one optical network unit is connected according to the transmission time delay between the first sub-optical signal and the second sub-optical signal. The method further comprises: The optical network termination device generates port mapping information of the one optical network unit, and the port mapping information of the one optical network unit comprises port information of the first output port and identification information of the one optical network unit. The identification information of the one optical network unit comprises a serial number (SN) of the one optical network unit and / or an identification (ID) of the one optical network unit. The method further comprises: The optical network termination device acquires port mapping information of each optical network unit of the plurality of optical network units; The optical network termination device generates topology information of the optical distribution network device according to the plurality of port mapping information of the plurality of optical network units, and the topology information comprises port information of the optical distribution network device to which the plurality of optical network units are connected. The port characteristics of the first output port comprise one or a combination of the following: the transmission time delay between the first sub-optical signal and the second sub-optical signal, the optical power difference between the first sub-optical signal and the second sub-optical signal, and a coding bit comprising a first bit value, wherein the first bit value is determined according to the transmission time delay between the first sub-optical signal and the second sub-optical signal. The optical distribution network device comprises: A first output port configured to receive a first service optical signal sent by the one optical network unit; A processing module configured to process the first service optical signal to obtain a first sub-optical signal and a second sub-optical signal, and send the first sub-optical signal and the second sub-optical signal to an input port, wherein the first service optical signal, the first sub-optical signal and the second sub-optical signal carry the same service information; The input port is further configured to output the first sub-optical signal and the second sub-optical signal. The method is performed by an optical network termination device, the optical network termination device is connected to a plurality of optical network units through an optical distribution network device, and the method comprises: The optical network termination device receives a plurality of groups of service optical signals from the plurality of optical network units, one group of service optical signals corresponds to one optical network unit of the plurality of optical network units, and the one group of service optical signals comprises a first sub-optical signal and a second sub-optical signal carrying the same service information, wherein the first sub-optical signal and the second sub-optical signal have a transmission time delay therebetween; The optical network termination device determines a first output port of the optical distribution network device to which the one optical network unit is connected according to the transmission time delay between the first sub-optical signal and the second sub-optical signal. The method further comprises: The optical network termination device generates port mapping information of the one optical network unit, and the port mapping information of the one optical network unit comprises port information of the first output port and identification information of the one optical network unit. The identification information of the one optical network unit comprises a serial number (SN) of the one optical network unit and / or an identification (ID) of The transceiver is configured to receive the service optical signal, and the transceiver and the processor are configured to jointly perform the method of any one of claims 1-12.

34. An optical network terminal device, comprising: Comprising: a transceiver and a processor; the transceiver is configured to transmit or receive the service optical signal, and the transceiver and the processor are configured to jointly perform the method of any one of claims 27-32.

35. A computer program product, characterised in that, When the computer program product is executed by a communication device, the communication device performs the method of any one of claims 1-12, 27-32.

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