CN118158571A - A method for generating topology information and related equipment - Google Patents

Abstract

The embodiment of the application discloses a method for generating topology information and related equipment. The method is applied to an optical communication system, and the optical communication system comprises a main gateway, at least one optical splitter and at least one slave gateway, wherein the main gateway is connected with the at least one optical splitter in a cascading mode, and each slave gateway is connected with a branch port of the corresponding optical splitter. Specifically, the master gateway sends a request message to the slave gateway for requesting the slave gateway to acquire and feed back the statistical information. The optical splitter performs disturbance on optical power of the slave gateway connected with each branch port, so that optical power change of the slave gateway is caused, the statistical information comprises optical power change parameters of the slave gateway, and the optical power change parameters of the slave gateway configured by the optical splitter for different branch ports are different. And the master gateway generates topology information according to the statistical information reported by each slave gateway, so that the connection relation between each slave gateway and the branch port of the corresponding optical splitter is determined, and topology restoration is realized.

Description

A method for generating topology information and related equipment

Technical Field

The present application relates to the FTTR field, and in particular to a method for generating topology information and related equipment.

Background technique

With the popularization of fixed access broadband and the emergence of various smart terminals, in order to solve the problem of home network WiFi coverage, fiber to the room (FTTR) technology has been proposed and received widespread attention. The main idea of FTTR is to extend the optical fiber further to the residents' rooms on the basis of fiber to the home (FTTH). The current FTTH network construction mode is to introduce the optical fiber into the weak current information box in the residents' room, and the user's WiFi access device is installed in the information box. Since the information box is usually located near the entrance door and far away from the user's daily activity area, the WiFi signal loss is large, resulting in limited user terminal access bandwidth. The main idea of FTTR is to extend the optical fiber further downward to the residents' room and install the WiFi access device inside the room, which shortens the distance between the user terminal device and the WiFi device, ensures the quality of the WiFi signal, and solves the problem of poor user terminal equipment caused by unstable WiFi access.

The FTTR network mainly includes a master gateway, at least one optical splitter and at least one slave gateway. The master gateway is connected to at least one optical splitter in a cascade manner, and each slave gateway is connected to the branch port of the corresponding optical splitter. In the FTTR network, how to obtain accurate network topology information in real time is an urgent problem to be solved.

Summary of the invention

The embodiment of the present application provides a method for generating topology information and related equipment, which can obtain the current topology information of the FTTR network in real time through the interaction between the master gateway and each slave gateway, thereby facilitating the effective management and maintenance of the FTTR network.

In a first aspect, an embodiment of the present application provides a method for generating topology information, and the method is applied to an optical communication system, wherein the optical communication system includes a master gateway, at least one optical splitter, and at least one slave gateway, wherein the master gateway is connected to the at least one optical splitter in a cascade manner, and each slave gateway is connected to a branch port of the corresponding optical splitter. The method includes the following steps: the master gateway sends a request message to each slave gateway, and the request message is used to request each slave gateway to obtain and feedback statistical information, and the statistical information includes an optical power change parameter of the slave gateway, wherein each optical splitter configures different optical power change parameters for slave gateways connected to different branch ports. The master gateway receives a response message sent by at least one slave gateway, and the response message includes statistical information. The master gateway generates topology information based on the response message, and the topology information includes a connection relationship between each slave gateway and the branch port of the corresponding optical splitter.

In this implementation, the master gateway sends a request message to the slave gateway to request the slave gateway to obtain and feedback statistical information. Among them, the optical splitter will disturb the optical power of the slave gateway connected to each branch port, thereby causing the optical power of the slave gateway to change. The statistical information includes the optical power change parameters of the slave gateway. The optical splitter configures different optical power change parameters for slave gateways connected to different branch ports. Then, the master gateway generates topology information based on the statistical information reported by each slave gateway, thereby determining the connection relationship between each slave gateway and the branch port of the corresponding optical splitter. In this way, the current topology information of the FTTR network can be obtained in real time through the interaction between the master gateway and each slave gateway, which is convenient for effective management and maintenance of the FTTR network.

In some possible implementations, at least one optical splitter includes a first optical splitter, the optical power variation parameter includes an optical power variation amplitude, and the first optical splitter configures different optical power variation amplitudes for slave gateways connected to different branch ports. In other words, the master gateway can identify the branch ports connected to each slave gateway based on the optical power variation amplitude reported by each slave gateway, so as to facilitate determination of topology information.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change amplitudes for slave gateways connected to different branch ports. The optical power change parameter also includes an optical power change frequency, wherein the first optical splitter configures a first optical power change frequency for slave gateways connected to all branch ports, and the second optical splitter configures a second optical power change frequency for slave gateways connected to all branch ports, and the first optical power change frequency is different from the second optical power change frequency. In other words, the master gateway can identify the optical splitters connected to each slave gateway based on the optical power change frequencies reported by each slave gateway, so as to facilitate determination of topology information.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power variation amplitudes for slave gateways connected to different branch ports, and the optical power variation amplitudes of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are the same. The statistical information also includes a received signal strength indicator (RSSI) and/or a round trip time (RTT) of the slave gateway, wherein the RSSI and/or RTT of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are different.

In this embodiment, each optical splitter has different optical power disturbance amplitudes for different branch ports, and different optical splitters have the same optical power disturbance amplitudes for branch ports with the same port number. Then the master gateway can first identify the same group of slave gateways with the same port number connected based on the different optical power variation amplitudes, and then distinguish the same group of slave gateways with the same port number connected based on RSSI and/or RTT, thereby identifying the optical splitters respectively connected to the same group of slave gateways to achieve topology restoration. For example, the larger the RSSI, the closer the cascade position of the optical splitter connected to the slave gateway is, and for another example, the smaller the RTT, the closer the cascade position of the optical splitter connected to the slave gateway is.

In some possible implementations, at least one optical splitter includes a first optical splitter, the optical power variation parameter includes an optical power variation frequency, and the first optical splitter configures different optical power variation frequencies for slave gateways connected to different branch ports. In other words, the master gateway can identify the branch ports connected to each slave gateway based on the optical power variation frequencies reported by each slave gateway, so as to facilitate determination of topology information.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change frequencies for slave gateways connected to different branch ports. The optical power change parameter also includes an optical power change amplitude, wherein the first optical splitter configures a first optical power change amplitude for slave gateways connected to all branch ports, and the second optical splitter configures a second optical power change amplitude for slave gateways connected to all branch ports, and the first optical power change amplitude is different from the second optical power change amplitude. In other words, the master gateway can identify the optical splitters connected to each slave gateway based on the optical power change amplitude reported by each slave gateway, so as to facilitate the determination of topology information.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change frequencies for slave gateways connected to different branch ports, and the optical power change frequencies of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are the same. The statistical information also includes the RSSI and/or RTT of the slave gateway, wherein the RSSI and/or RTT of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are different.

In this embodiment, each optical splitter has different optical power disturbance frequencies for different branch ports, and different optical splitters have the same optical power disturbance frequencies for branch ports with the same port number. Then the master gateway can first identify the same group of slave gateways with the same port number connected based on the different optical power change frequencies, and then distinguish the same group of slave gateways with the same port number connected based on RSSI and/or RTT, thereby identifying the optical splitters respectively connected to the same group of slave gateways to achieve topology restoration. For example, the larger the RSSI, the closer the cascade position of the optical splitter connected to the slave gateway is, and for another example, the smaller the RTT, the closer the cascade position of the optical splitter connected to the slave gateway is.

In some possible implementations, the optical power variation parameter is counted by the slave gateway in the first period, and RSSI and/or RTT is counted by the slave gateway in the second period. That is, the optical splitter performs optical power disturbance on each branch port in the first period, and stops detouring and restores normal optical power in the second period.

In some possible implementations, the request message and the response message use an optical network unit management and control interface (OMCI) message format or an operation administration and maintenance (OAM) message format to adapt to existing standards.

In some possible implementations, the optical fiber connected to each branch port of the optical splitter uses thermo-optical material, and different voltages are applied to the optical fibers connected to different branch ports of the optical splitter to achieve different optical power change parameters configured for slave gateways connected to different branch ports. It should be understood that this implementation provides a specific method for achieving optical power disturbance, which is relatively simple to implement and requires little change to the adopted structure.

In some possible implementations, the method further includes: the master gateway sends a configuration message to each optical splitter, the configuration message is used to instruct each optical splitter to configure corresponding optical power variation parameters for slave gateways connected to different branch ports. In other words, the optical splitter specifically performs optical power disturbance on each branch port according to the configuration of the master gateway, that is, centralized management through the master gateway is more conducive to real-time acquisition of topology information.

In a second aspect, an embodiment of the present application provides a method for generating topology information, and the method is applied to an optical communication system, wherein the optical communication system includes a master gateway, at least one optical splitter and at least one slave gateway, wherein the master gateway is connected to the at least one optical splitter in a cascade manner, and each slave gateway is connected to a branch port of the corresponding optical splitter. The method includes the following steps: the slave gateway receives a request message sent by the master gateway. The slave gateway obtains statistical information based on the request message, and the statistical information includes an optical power change parameter of the slave gateway, wherein each optical splitter has different optical power change parameters configured for slave gateways connected to different branch ports. The slave gateway sends a response message including the statistical information to the master gateway, so that the master gateway generates topology information based on the response message, and the topology information includes a connection relationship between each slave gateway and the branch port of the corresponding optical splitter.

In some possible implementations, the at least one optical splitter includes a first optical splitter, the optical power variation parameter includes an optical power variation amplitude, and the first optical splitter configures different optical power variation amplitudes for slave gateways connected to different branch ports.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change amplitudes for slave gateways connected to different branch ports. The optical power change parameter also includes an optical power change frequency, wherein the first optical splitter configures a first optical power change frequency for slave gateways connected to all branch ports, and the second optical splitter configures a second optical power change frequency for slave gateways connected to all branch ports, and the first optical power change frequency is different from the second optical power change frequency.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power variation amplitudes for slave gateways connected to different branch ports, and the optical power variation amplitudes of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are the same. The statistical information also includes the RSSI and/or RTT of the slave gateway, wherein the RSSI and/or RTT of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are different.

In some possible implementations, the at least one optical splitter includes a first optical splitter, the optical power variation parameter includes an optical power variation frequency, and the optical power variation frequencies configured by the first optical splitter for slave gateways connected to different branch ports are different.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change frequencies for slave gateways connected to different branch ports. The optical power change parameter also includes an optical power change amplitude, wherein the first optical splitter configures a first optical power change amplitude for slave gateways connected to all branch ports, and the second optical splitter configures a second optical power change amplitude for slave gateways connected to all branch ports, and the first optical power change amplitude is different from the second optical power change amplitude.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change frequencies for slave gateways connected to different branch ports, and the optical power change frequencies of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are the same. The statistical information also includes the RSSI and/or RTT of the slave gateway, wherein the RSSI and/or RTT of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are different.

In some possible implementations, the optical power variation parameter is counted by the slave gateway in a first time period, and the RSSI and/or RTT is counted by the slave gateway in a second time period.

In some possible implementations, the request message and the response message adopt the OMCI message format or the OAM message format.

In some possible implementations, the optical fiber connected to each branch port of the optical splitter uses thermo-optical material, and different voltages are applied to the optical fibers connected to different branch ports of the optical splitter to achieve different optical power variation parameters configured for slave gateways connected to different branch ports.

In a third aspect, an embodiment of the present application provides a master gateway, the master gateway comprising: a processing unit and a transceiver unit, wherein the master gateway is connected to at least one optical splitter in a cascade manner, and each slave gateway is connected to a branch port of the corresponding optical splitter. The transceiver unit is used to send a request message to each slave gateway, the request message is used to request each slave gateway to obtain and feedback statistical information, the statistical information includes an optical power change parameter of the slave gateway, wherein each optical splitter configures different optical power change parameters for slave gateways connected to different branch ports. The transceiver unit is used to receive a response message sent by at least one slave gateway, the response message includes statistical information. The processing unit is used to generate topology information based on the response message, the topology information includes a connection relationship between each slave gateway and the branch port of the corresponding optical splitter.

In some possible implementations, the at least one optical splitter includes a first optical splitter, the optical power variation parameter includes an optical power variation amplitude, and the first optical splitter configures different optical power variation amplitudes for slave gateways connected to different branch ports.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change amplitudes for slave gateways connected to different branch ports. The optical power change parameter also includes an optical power change frequency, wherein the first optical splitter configures a first optical power change frequency for slave gateways connected to all branch ports, and the second optical splitter configures a second optical power change frequency for slave gateways connected to all branch ports, and the first optical power change frequency is different from the second optical power change frequency.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power variation amplitudes for slave gateways connected to different branch ports, and the optical power variation amplitudes of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are the same. The statistical information also includes the RSSI and/or RTT of the slave gateway, wherein the RSSI and/or RTT of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are different.

In some possible implementations, the at least one optical splitter includes a first optical splitter, the optical power variation parameter includes an optical power variation frequency, and the optical power variation frequencies configured by the first optical splitter for slave gateways connected to different branch ports are different.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change frequencies for slave gateways connected to different branch ports. The optical power change parameter also includes an optical power change amplitude, wherein the first optical splitter configures a first optical power change amplitude for slave gateways connected to all branch ports, and the second optical splitter configures a second optical power change amplitude for slave gateways connected to all branch ports, and the first optical power change amplitude is different from the second optical power change amplitude.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change frequencies for slave gateways connected to different branch ports, and the optical power change frequencies of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are the same. The statistical information also includes the RSSI and/or RTT of the slave gateway, wherein the RSSI and/or RTT of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are different.

In some possible implementations, the optical power variation parameter is counted by the slave gateway in a first time period, and the RSSI and/or RTT is counted by the slave gateway in a second time period.

In some possible implementations, the request message and the response message adopt the OMCI message format or the OAM message format.

In some possible implementations, the optical fiber connected to each branch port of the optical splitter uses thermo-optical material, and different voltages are applied to the optical fibers connected to different branch ports of the optical splitter to achieve different optical power variation parameters configured for slave gateways connected to different branch ports.

In some possible implementations, the transceiver unit is further used to: send a configuration message to each optical splitter, where the configuration message is used to instruct each optical splitter to configure corresponding optical power variation parameters for slave gateways connected to different branch ports.

In a fourth aspect, an embodiment of the present application provides a slave gateway, which includes: a processing unit and a transceiver unit, wherein the slave gateway is connected to the branch port of the corresponding optical splitter, and the master gateway is connected to at least one optical splitter in a cascade manner. The transceiver unit is used to: receive a request message sent by the master gateway. The processing unit is used to: obtain statistical information according to the request message, the statistical information includes an optical power change parameter of the slave gateway, wherein each optical splitter has different optical power change parameters configured for slave gateways connected to different branch ports. The transceiver unit is used to: send a response message including the statistical information to the master gateway, so that the master gateway generates topology information according to the response message, and the topology information includes the connection relationship between each slave gateway and the branch port of the corresponding optical splitter.

In some possible implementations, the at least one optical splitter includes a first optical splitter, the optical power variation parameter includes an optical power variation amplitude, and the first optical splitter configures different optical power variation amplitudes for slave gateways connected to different branch ports.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change amplitudes for slave gateways connected to different branch ports. The optical power change parameter also includes an optical power change frequency, wherein the first optical splitter configures a first optical power change frequency for slave gateways connected to all branch ports, and the second optical splitter configures a second optical power change frequency for slave gateways connected to all branch ports, and the first optical power change frequency is different from the second optical power change frequency.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power variation amplitudes for slave gateways connected to different branch ports, and the optical power variation amplitudes of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are the same. The statistical information also includes the RSSI and/or RTT of the slave gateway, wherein the RSSI and/or RTT of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are different.

In some possible implementations, the at least one optical splitter includes a first optical splitter, the optical power variation parameter includes an optical power variation frequency, and the optical power variation frequencies configured by the first optical splitter for slave gateways connected to different branch ports are different.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change frequencies for slave gateways connected to different branch ports. The optical power change parameter also includes an optical power change amplitude, wherein the first optical splitter configures a first optical power change amplitude for slave gateways connected to all branch ports, and the second optical splitter configures a second optical power change amplitude for slave gateways connected to all branch ports, and the first optical power change amplitude is different from the second optical power change amplitude.

In some possible implementations, at least one optical splitter further includes a second optical splitter, and the second optical splitter configures different optical power change frequencies for slave gateways connected to different branch ports, and the optical power change frequencies of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are the same. The statistical information also includes the RSSI and/or RTT of the slave gateway, wherein the RSSI and/or RTT of the slave gateways connected to the branch ports with the same port number on the first optical splitter and the second optical splitter are different.

In some possible implementations, the optical power variation parameter is counted by the slave gateway in a first time period, and the RSSI and/or RTT is counted by the slave gateway in a second time period.

In some possible implementations, the request message and the response message adopt the OMCI message format or the OAM message format.

In some possible implementations, the optical fiber connected to each branch port of the optical splitter uses thermo-optical material, and different voltages are applied to the optical fibers connected to different branch ports of the optical splitter to achieve different optical power variation parameters configured for slave gateways connected to different branch ports.

In an embodiment of the present application, the master gateway sends a request message to the slave gateway to request the slave gateway to obtain and feedback statistical information. Among them, the optical splitter will disturb the optical power of the slave gateways connected to each branch port, thereby causing the optical power of the slave gateway to change. The statistical information includes the optical power change parameters of the slave gateway, and the optical splitter configures different optical power change parameters for the slave gateways connected to different branch ports. Furthermore, the master gateway generates topology information based on the statistical information reported by each slave gateway, thereby determining the connection relationship between each slave gateway and the branch port of the corresponding optical splitter. In this way, the current topology information of the FTTR network can be obtained in real time through the interaction between the master gateway and each slave gateway, which is convenient for effective management and maintenance of the FTTR network.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the system architecture of FTTH;

Figure 2 is a schematic diagram of the system architecture of FTTR;

FIG3 is a schematic diagram of a first embodiment of a method for generating topology information in an embodiment of the present application;

FIG4 is a schematic diagram of a structure of an optical splitter in an embodiment of the present application;

FIG5 is a schematic diagram of a network topology structure in an embodiment of the present application;

FIG6 is a schematic diagram of a second embodiment of a method for generating topology information in an embodiment of the present application;

FIG7 is a schematic diagram of the structure of a possible master gateway in an embodiment of the present application;

FIG8 is a schematic diagram of the structure of another possible master gateway in an embodiment of the present application;

FIG9 is a schematic diagram of a possible structure of a slave gateway in an embodiment of the present application;

FIG10 is a schematic diagram of the structure of another possible slave gateway in an embodiment of the present application.

Detailed ways

The embodiment of the present application provides a method for generating topology information and related equipment. The current topology information of the FTTR network can be obtained in real time through the interaction between the master gateway and each slave gateway, which is convenient for effectively managing and maintaining the FTTR network. It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, rather than to limit a specific order or sequence. It should be understood that the above terms can be interchanged where appropriate, so that the embodiments described in this application can be implemented in an order other than the content described in this application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

Passive optical network (PON) is an implementation technology of optical access network. PON is an optical access technology for point-to-multipoint transmission. The current PON system is mainly used in fiber to the home (FTTH) scenarios, and each home user will only have one ONU.

Figure 1 is a schematic diagram of the system architecture of FTTH. The OLT is connected to the upper network side equipment (such as switches, routers, etc.), and the lower layer is connected to one or more optical distribution networks (ODN). The ODN includes a passive optical splitter for optical power distribution, a trunk optical fiber connected between the passive optical splitter and the OLT, and a branch optical fiber connected between the passive optical splitter and the ONU. When transmitting data downstream, the ODN transmits the downstream data of the OLT to each ONU through the splitter, and the ONU selectively receives the downstream data carrying its own identification. When transmitting data upstream, the ODN combines the optical signals sent by N ONUs into one optical signal and transmits it to the OLT. The ONU provides a user-side interface for the OAN and is connected to the ODN at the same time. If the ONU also provides a user port function, such as the ONU provides an Ethernet user port or a plain old telephone service (POTS) user port, it is called an optical network terminal (ONT).

On the basis of FTTH, in order to solve the problem of home network WIFI coverage, optical fiber can be further extended to the residents' rooms. ONU is installed inside the room, which shortens the distance between the user terminal and ONU and improves the signal quality. This application scenario is called fiber to the room (FTTR).

Figure 2 is a schematic diagram of the system architecture of FTTR. The FTTR network and the FTTH network can be regarded as a two-level PON system. The OLT in the first-level PON system (FTTH) is deployed in the central machine room, and the ONU is deployed in the information box of the home. The master gateway in the second-level PON system (FTTR) can replace the ONU in FTTH and be deployed in the information box of the home. The master gateway has similar functions as the OLT in the FTTH scenario in the FTTR scenario, and the master gateway can also have similar functions as the ONU in the FTTH scenario. In other words, the master gateway in the FTTR is a device that has both OLT and ONU functions, and can serve as a network device that connects FTTH and FTTR. The slave gateway in the FTTR can be deployed in each room of the home to connect with the user terminal. The slave gateway and the ONU in the FTTH are essentially the same type of network devices. The difference is that the ONU in the FTTH is generally deployed in the information box, and there is usually an access point (AP) between the user terminal. In FTTR, each room is accessed from a gateway, which also has the function of an AP and can directly establish a WiFi connection with the user terminal.

It should be understood that multiple slave gateways can be deployed in the FTTR, and each slave gateway is connected to the branch port of the corresponding optical splitter. In addition, the present application does not limit the number of optical splitters in the FTTR, and the master gateway is connected to each optical splitter in a cascade manner. The master gateway can achieve unified management and configuration of all slave gateways. For example, as the control center of the home network, the master gateway can configure the WiFi hotspots of the whole house into a unified network, optimize the channels to avoid interference, and control the roaming and switching of user terminals, reduce network switching time, and improve user experience.

Fig. 3 is a schematic diagram of a first embodiment of a method for generating topology information in an embodiment of the present application. In this example, the method for generating topology information includes the following steps.

301. The main gateway sends a configuration message to the optical splitter.

In a possible implementation, the optical splitter can be locally configured according to the configuration message sent by the master gateway, so that the optical power of each branch port can be disturbed according to the configuration, so that each slave gateway detects the corresponding optical power change. It should be understood that in another possible implementation, the optical splitter can also complete the local configuration in advance, so that the master gateway does not need to send a configuration message to the optical splitter.

302. The optical splitter performs optical power disturbance on each branch port.

It should be noted that performing optical power disturbance on each branch port refers to adjusting the size of the optical power output by each branch port. Optical power disturbance includes, but is not limited to, the disturbance amplitude of optical power and the disturbance frequency of optical power. Among them, the optical splitter has different optical power disturbance rules for different branch ports, that is, the optical splitter configures different optical power change parameters for the slave gateways connected to different branch ports, and the optical power change parameters include, but are not limited to, the optical power change amplitude and the optical power change frequency. For example, the optical splitter has different disturbance amplitudes for optical power disturbances on different branch ports, that is, the optical power change amplitudes detected by different slave gateways are different. For another example, the optical splitter has different disturbance frequencies for optical power disturbances on different branch ports, that is, the optical power change frequencies detected by different slave gateways are different, or the number of optical power changes detected by different slave gateways within a unit period is different.

FIG4 is a schematic diagram of the structure of an optical splitter in an embodiment of the present application. As shown in FIG4 , a microcontroller unit (MCU) is added to the optical splitter. The MCU can burn the electrode program that disturbs different branch ports according to the configuration message sent by the main gateway or the pre-set configuration. In a possible implementation, the optical fiber connected to each branch port of the optical splitter adopts thermo-optical material. When a voltage is applied to the outer layer of the thermo-optical material, causing the temperature to change, part of the light field energy will escape from there, thereby achieving the purpose of adjusting the light attenuation by using the MCU. It should be understood that the intensity of the voltage applied by the MCU to each branch port determines the disturbance amplitude of the optical power, and the frequency of the voltage applied by the MCU to each branch port determines the disturbance frequency of the optical power.

303. The master gateway sends a request message to the slave gateway.

The master gateway sends a request message to the slave gateway to request the slave gateway to perform optical power detection, thereby obtaining an optical power variation parameter for reflecting an optical power disturbance situation.

304. Obtain statistical information from the gateway.

It should be noted that the statistical information obtained from the gateway includes but is not limited to the optical power change parameter. For example, the statistical information may also include the received signal strength indication (RSSI) and/or the round trip time (RTT) from the gateway. Other embodiments will be introduced below.

305. The slave gateway sends a response message carrying statistical information to the master gateway.

It should be noted that the present application does not limit the format of the interactive messages between the master gateway and the slave gateway. For example, an existing message format can be used to adapt to existing standards. As an example, when the master gateway and the slave gateway use the GPON standard, the request message and the response message can use the optical network unit management control interface (OMCI) message format. For example, as shown in Table 1 below, a new definition can be made in the corresponding field of the OMCI message to indicate the optical power change parameter.

Table 1

As another example, when the master gateway and the slave gateway use the EPON standard, the request message and the response message may adopt the Operation Administration and Maintenance (OAM) message format. For example, as shown in Table 2 below, a new field may be added to the OAM message to indicate the optical power change parameter.

Table 2

It should be understood that, in addition to the OMCI message and OAM message described above, the message format for interaction between the master gateway and the slave gateway may also be messages in other formats such as Ethernet messages. In addition, in some possible scenarios, the master gateway and the optical splitter and the optical splitter and the slave gateway may also be connected by an optoelectronic composite cable, so that the master gateway and the slave gateway may also interact through electrical signals.

306. The main gateway generates topology information according to the response message.

It should be noted that, since the optical splitter performs optical power disturbances on different branch ports in different rules, the optical power change parameters detected by each slave gateway are also different. Therefore, the master gateway can distinguish different slave gateways based on the statistical messages reported by each slave gateway, thereby determining the optical splitter connected to each slave gateway and the specific connected branch port, thereby achieving topology restoration. It should be understood that in actual applications, different strategies can be formulated to identify the optical splitter connected to each slave gateway and the specific connected branch port. Several possible implementation methods are introduced below.

Implementation method 1: different slave gateways connected to the same optical splitter are distinguished by the disturbance amplitude of the optical power, and different optical splitters are distinguished by the disturbance frequency of the optical power.

FIG5 is a schematic diagram of a network topology structure in an embodiment of the present application. As shown in FIG5, optical splitter 0, optical splitter 1 and optical splitter 2 are connected in cascade, port 0 of optical splitter 0 is connected to slave gateway 0, port 1 of optical splitter 0 is connected to slave gateway 1, port 0 of optical splitter 1 is connected to slave gateway 2, port 1 of optical splitter 1 is connected to slave gateway 3, port 0 of optical splitter 2 is connected to slave gateway 4, and port 1 of optical splitter 2 is connected to slave gateway 5.

Taking Figure 5 as an example, each optical splitter has the same optical power disturbance frequency for all branch ports, each optical splitter has different optical power disturbance amplitudes for different branch ports, and different optical splitters have different optical power disturbance frequencies. For example, the optical power disturbance frequency used by optical splitter 0 for all ports is f0, the optical power disturbance frequency used by optical splitter 1 for all ports is f1, and the optical power disturbance frequency used by optical splitter 2 for all ports is f2. The optical power disturbance amplitude used by optical splitter 0 for port 0 is p0, and the optical power disturbance amplitude used by optical splitter 0 for port 1 is p1. The optical power disturbance amplitude used by optical splitter 1 for port 0 is p2, and the optical power disturbance amplitude used by optical splitter 0 for port 1 is p3. The optical power disturbance amplitude used by optical splitter 2 for port 0 is p4, and the optical power disturbance amplitude used by optical splitter 2 for port 1 is p5.

It should be understood that f0, f1 and f2 are different from each other, so the master gateway can identify the optical splitter connected to each slave gateway according to the optical power change frequency reported by each slave gateway. Furthermore, p0 and p1 are different, p2 and p3 are different, and p4 and p5 are different, so the master gateway can identify the branch port connected to each slave gateway according to the optical power change amplitude reported by each slave gateway. In this way, the master gateway also knows which optical splitter each slave gateway is connected to and which specific port it is connected to.

Implementation method 2: different slave gateways connected to the same optical splitter are distinguished by the disturbance frequency of the optical power, and different optical splitters are distinguished by the disturbance amplitude of the optical power.

Taking Figure 5 as an example, the optical power disturbance amplitude of each optical splitter for all branch ports is the same, the optical power disturbance frequency of each optical splitter for different branch ports is different, and the optical power disturbance amplitudes of different optical splitters are different. For example, the optical power disturbance amplitude used by optical splitter 0 for all ports is p0, the optical power disturbance amplitude used by optical splitter 1 for all ports is p1, and the optical power disturbance amplitude used by optical splitter 2 for all ports is p2. The optical power disturbance frequency used by optical splitter 0 for port 0 is f0, and the optical power disturbance frequency used by optical splitter 0 for port 1 is f1. The optical power disturbance frequency used by optical splitter 1 for port 0 is f2, and the optical power disturbance frequency used by optical splitter 0 for port 1 is f3. The optical power disturbance frequency used by optical splitter 2 for port 0 is f4, and the optical power disturbance frequency used by optical splitter 2 for port 1 is f5.

It should be understood that p0, p1 and p2 are different from each other, so the master gateway can identify the optical splitter connected to each slave gateway according to the optical power change amplitude reported by each slave gateway. Furthermore, f0 and f1 are different, f2 and f3 are different, and f4 and f5 are different, so the master gateway can identify the branch port connected to each slave gateway according to the optical power change frequency reported by each slave gateway. In this way, the master gateway also knows which optical splitter each slave gateway is connected to and which specific port it is connected to.

Fig. 6 is a schematic diagram of a second embodiment of the method for generating topology information in an embodiment of the present application. In this example, the method for generating topology information includes the following steps.

601. The master gateway sends a request message 1 to the slave gateway.

The master gateway requests the slave gateway to detect RSSI and/or RTT by sending a request message 1 to the slave gateway. It should be understood that at this time, the optical splitter has not yet disturbed the optical power of each branch port, so each slave gateway detects RSSI and/or RTT in a normal state.

602. Obtain statistical information 1 from the gateway.

The slave gateway detects RSSI and/or RTT according to the request message 1 sent by the master gateway, thereby obtaining statistical information 1 including RSSI and/or RTT.

603. The slave gateway sends a response message 1 carrying statistical information 1 to the master gateway.

It should be noted that the present application does not limit the format of the interactive messages between the master gateway and the slave gateway. The specific formats of the request message 1 and the response message 1 can refer to the relevant introduction of step 305 in the embodiment shown in FIG. 3 , which will not be repeated here.

604. The main gateway sends a configuration message to the optical splitter.

605. The optical splitter performs optical power disturbance on each branch port.

Step 604-step 605 in this embodiment is similar to step 301-step 302 in the embodiment shown in FIG. 3 , and will not be described in detail here.

606. The master gateway sends a request message 2 to the slave gateway.

It should be understood that at this time, the optical splitter has begun to disturb the optical power of each branch port. Request message 2 is different from the above-mentioned request message 1. Request message 2 is used to request optical power detection from the gateway, so as to obtain optical power change parameters used to reflect the optical power disturbance. Among them, the optical power change parameters include but are not limited to the optical power change amplitude and the optical power change frequency.

607. Obtain statistical information 2 from the gateway.

It should be understood that the statistical information 2 is different from the statistical information 1 described above, and the statistical information 2 includes an optical power variation parameter detected from the gateway.

608. The slave gateway sends a response message 2 carrying statistical information 2 to the master gateway.

It should be noted that the present application does not limit the format of the interactive messages between the master gateway and the slave gateway. The specific formats of the request message 2 and the response message 2 can refer to the relevant introduction of step 305 in the embodiment shown in FIG. 3 , which will not be repeated here.

609. The main gateway generates topology information according to the response message 1 and the response message 2.

It should be noted that, since the optical splitter performs optical power disturbances of different rules on different branch ports, the optical power change parameters detected by each slave gateway connected to the same optical splitter are also different. Therefore, the master gateway can distinguish different slave gateways connected to the same optical splitter according to the statistical message 2 reported by each slave gateway, thereby determining the branch port connected to each slave gateway. Furthermore, the ports with the same port number on different optical splitters use the same rule of optical power disturbance, so the master gateway can also distinguish the same group of slave gateways with the same port number according to the statistical message 1 reported by each slave gateway, thereby identifying the optical splitters connected to the same group of slave gateways. For example, the larger the RSSI, the closer the cascade position of the optical splitter connected to the slave gateway is. For another example, the smaller the RTT, the closer the cascade position of the optical splitter connected to the slave gateway is. The master gateway can realize topology restoration by combining statistical information 1 and statistical information 2. It should be understood that in practical applications, different strategies can be formulated in combination with statistical information 1 and statistical information 2 to identify the optical splitters connected to each slave gateway and the specific connected branch ports. Several possible implementation methods are introduced below.

Implementation method 3: different slave gateways connected to the same optical splitter are distinguished by the disturbance amplitude of optical power, and the optical splitter connected to the slave gateway is identified by RSSI and/or RTT.

Taking Figure 5 as an example, each optical splitter has different optical power disturbance amplitudes for different branch ports, and different optical splitters have the same optical power disturbance amplitudes for branch ports with the same port number. For example, the optical power disturbance amplitude used by optical splitter 0 for port 0 is p0, and the optical power disturbance amplitude used by optical splitter 0 for port 1 is p1. The optical power disturbance amplitude used by optical splitter 1 for port 0 is p0, and the optical power disturbance amplitude used by optical splitter 0 for port 1 is p1. The optical power disturbance amplitude used by optical splitter 2 for port 0 is p0, and the optical power disturbance amplitude used by optical splitter 2 for port 1 is p1.

It should be understood that p0 and p1 are different from each other, so the master gateway can identify the branch ports connected to each slave gateway according to the optical power change amplitude reported by each slave gateway. It can be seen that the optical power change amplitude detected by slave gateway 0, slave gateway 2 and slave gateway 4 is p0, and the optical power change amplitude detected by slave gateway 1, slave gateway 3 and slave gateway 5 is p1. For the detected RSSI, slave gateway 0>slave gateway 2>slave gateway 4, slave gateway 1>slave gateway 3>slave gateway 5. For the detected RTT, slave gateway 0<slave gateway 2<slave gateway 4, slave gateway 1<slave gateway 3<slave gateway 5. Based on this, it can be inferred that slave gateway 0 and slave gateway 1 are connected to optical splitter 0, slave gateway 2 and slave gateway 3 are connected to optical splitter 1, and slave gateway 4 and slave gateway 5 are connected to optical splitter 2.

Embodiment 4: Different slave gateways connected to the same optical splitter are distinguished by the disturbance frequency of optical power, and the optical splitter connected to the slave gateway is identified by RSSI and/or RTT.

Taking Figure 5 as an example, each optical splitter has different optical power disturbance frequencies for different branch ports, and different optical splitters have the same optical power disturbance frequencies for branch ports with the same port number. For example, the optical power disturbance frequency used by optical splitter 0 for port 0 is f0, and the optical power disturbance frequency used by optical splitter 0 for port 1 is f1. The optical power disturbance frequency used by optical splitter 1 for port 0 is f0, and the optical power disturbance frequency used by optical splitter 0 for port 1 is f1. The optical power disturbance frequency used by optical splitter 2 for port 0 is f0, and the optical power disturbance frequency used by optical splitter 2 for port 1 is f1.

It should be understood that f0 and f1 are different from each other, so the master gateway can identify the branch port connected to each slave gateway according to the optical power change frequency reported by each slave gateway. It can be seen that the optical power change frequency detected by slave gateway 0, slave gateway 2 and slave gateway 4 is f0, and the optical power change frequency detected by slave gateway 1, slave gateway 3 and slave gateway 5 is f1. For the detected RSSI, slave gateway 0>slave gateway 2>slave gateway 4, slave gateway 1>slave gateway 3>slave gateway 5. For the detected RTT, slave gateway 0<slave gateway 2<slave gateway 4, slave gateway 1<slave gateway 3<slave gateway 5. Based on this, it can be inferred that slave gateway 0 and slave gateway 1 are connected to optical splitter 0, slave gateway 2 and slave gateway 3 are connected to optical splitter 1, and slave gateway 4 and slave gateway 5 are connected to optical splitter 2.

To summarize the above introduction, in an embodiment of the present application, the master gateway sends a request message to the slave gateway to request the slave gateway to obtain and feedback statistical information. Among them, the optical splitter will disturb the optical power of the slave gateways connected to each branch port, thereby causing the optical power of the slave gateway to change, and the statistical information includes the optical power change parameters of the slave gateway, and the optical splitter configures different optical power change parameters for the slave gateways connected to different branch ports. Furthermore, the master gateway generates topology information based on the statistical information reported by each slave gateway, thereby determining the connection relationship between each slave gateway and the branch port of the corresponding optical splitter. In this way, the current topology information of the FTTR network can be obtained in real time through the interaction between the master gateway and each slave gateway, which is convenient for effective management and maintenance of the FTTR network.

The master gateway and slave gateway provided in the embodiment of the present application are introduced below.

FIG7 is a schematic diagram of the structure of a possible master gateway in an embodiment of the present application. The master gateway includes a processing unit 701 and a transceiver unit 702. Specifically, the transceiver unit 702 is used to perform the operations of the master gateway in sending and receiving messages in the embodiments shown in FIG3 and FIG6, and the processing unit 701 is used to perform other operations of the master gateway in addition to sending and receiving messages in the embodiments shown in FIG3 and FIG6.

FIG8 is a schematic diagram of the structure of another possible master gateway in an embodiment of the present application. The master gateway includes a processor 801 and a transceiver 802, and the processor 801 and the transceiver 802 are interconnected through lines. It should be noted that the transceiver 802 is used to perform the operations of the master gateway in sending and receiving messages in the embodiments shown in FIG3 and FIG6 above. The processor 801 is used to perform other operations of the master gateway in addition to sending and receiving messages in the embodiments shown in FIG3 and FIG6 above. In some possible implementations, the processor 801 includes the above-mentioned processing unit 701, and the transceiver 802 includes the above-mentioned transceiver unit 702. Optionally, the master gateway may also include a memory 803, wherein the memory 803 is used to store program instructions and data.

FIG9 is a schematic diagram of a possible structure of a slave gateway in an embodiment of the present application. The slave gateway includes a processing unit 901 and a transceiver unit 902. Specifically, the transceiver unit 902 is used to perform the operations of sending and receiving messages by the slave gateway in the embodiments shown in FIG3 and FIG6, and the processing unit 901 is used to perform other operations of the slave gateway in addition to sending and receiving messages in the embodiments shown in FIG3 and FIG6.

Figure 10 is a schematic diagram of the structure of another possible slave gateway in an embodiment of the present application. The slave gateway includes a processor 1001 and a transceiver 1002, and the processor 1001 and the transceiver 1002 are interconnected by lines. It should be noted that the transceiver 1002 is used to perform the operations of sending and receiving messages from the slave gateway in the embodiments shown in Figures 3 and 6 above. The processor 1001 is used to perform other operations of the slave gateway except sending and receiving messages in the embodiments shown in Figures 3 and 6 above. In some possible implementations, the processor 1001 includes the above-mentioned processing unit 901, and the transceiver 1002 includes the above-mentioned transceiver unit 902. Optionally, the slave gateway may also include a memory 1003, wherein the memory 1003 is used to store program instructions and data.

It should be noted that the processor shown in Figures 8 and 10 above can adopt a general central processing unit (CPU), a microprocessor, an application-specific integrated circuit ASIC, or at least one integrated circuit to execute relevant programs to implement the technical solution provided in the embodiment of the present application. The memory shown in Figures 8 and 10 above can store an operating system and other applications. When the technical solution provided in the embodiment of the present application is implemented by software or firmware, the program code for implementing the technical solution provided in the embodiment of the present application is stored in the memory and executed by the processor. In one embodiment, the processor may include a memory inside. In another embodiment, the processor and the memory are two independent structures.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

Those of ordinary skill in the art will appreciate that all or part of the steps to implement the above-mentioned embodiments can be completed by hardware, or can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium mentioned above can be a read-only memory, a random access memory, etc. Specifically, for example: the above-mentioned processing unit or processor can be a central processing unit, a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. Whether the above-mentioned functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

When software is used for implementation, the method steps described in the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, a computer, a server, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk (SSD)), etc.

Claims (42)

1. A method of generating topology information, the method being applied to an optical communication system including a master gateway, at least one optical splitter, and at least one slave gateway, the master gateway being connected to the at least one optical splitter in a cascade, each of the slave gateways being connected to a branch port of a corresponding optical splitter, the method comprising:

The master gateway sends a request message to each slave gateway, wherein the request message is used for requesting each slave gateway to acquire and feed back statistical information, the statistical information comprises optical power change parameters of the slave gateway, and each optical splitter is different in optical power change parameters configured for the slave gateway connected with different branch ports;

the master gateway receives a response message sent by the at least one slave gateway, wherein the response message comprises the statistical information;

and the master gateway generates topology information according to the response message, wherein the topology information comprises the connection relation between each slave gateway and a branch port of the corresponding optical splitter.

2. The method of claim 1, wherein the at least one optical splitter comprises a first optical splitter, the optical power variation parameter comprising an optical power variation magnitude, the first optical splitter configured to vary the optical power variation magnitude from the gateway for different branch port connections.

3. The method of claim 2, wherein the at least one optical splitter further comprises a second optical splitter configured to vary in amplitude of optical power variation from the gateway for different branch port connections;

The optical power variation parameters further comprise optical power variation frequencies, wherein the first optical splitter configures first optical power variation frequencies for slave gateways connected with all branch ports, the second optical splitter configures second optical power variation frequencies for slave gateways connected with all branch ports, and the first optical power variation frequencies are different from the second optical power variation frequencies.

4. The method of claim 2, wherein the at least one optical splitter further comprises a second optical splitter, the second optical splitter being configured to have different magnitudes of optical power variation for slave gateways to which different branch ports are connected, the magnitudes of optical power variation for slave gateways to which the same port numbers on the first optical splitter and the second optical splitter are connected being the same;

The statistical information also comprises the received signal strength indication RSSI and/or round trip time RTT of the slave gateway, wherein the RSSIs and/or RTTs of the slave gateways connected by the branch ports with the same port numbers on the first optical splitter and the second optical splitter are different.

5. The method of claim 1, wherein the at least one optical splitter comprises a first optical splitter, the optical power variation parameter comprising an optical power variation frequency, the first optical splitter configured to be different from a gateway for different branch port connections.

6. The method of claim 5, wherein the at least one optical splitter further comprises a second optical splitter configured to vary the frequency of optical power changes from the gateway for different branch port connections;

The optical power variation parameters further comprise optical power variation amplitude, wherein the first optical splitter configures first optical power variation amplitude for the slave gateways connected with all branch ports, the second optical splitter configures second optical power variation amplitude for the slave gateways connected with all branch ports, and the first optical power variation amplitude is different from the second optical power variation amplitude.

7. The method of claim 5, wherein the at least one optical splitter further comprises a second optical splitter, the second optical splitter having different frequencies of optical power variation configured for slave gateways to which different branch ports are connected, the first optical splitter and the second optical splitter having the same frequency of optical power variation from the slave gateways to which the same port number of the branch ports is connected;

The statistical information also comprises the received signal strength indication RSSI and/or round trip time RTT of the slave gateway, wherein the RSSIs and/or RTTs of the slave gateways connected by the branch ports with the same port numbers on the first optical splitter and the second optical splitter are different.

8. The method according to claim 4 or 7, characterized in that the optical power variation parameter is counted by the slave gateway during a first period of time, and the RSSI and/or the RTT is counted by the slave gateway during a second period of time.

9. The method according to any one of claims 1 to 8, wherein the request message and the response message are in an optical network unit management control interface OMCI message format or an operation maintenance administration OAM message format.

10. The method according to any one of claims 1 to 9, wherein the optical fiber accessed by each branch port of the optical splitter is made of thermo-optical material, and the optical fiber accessed by different branch ports of the optical splitter is configured from a gateway to have different optical power variation parameters by applying different voltages to achieve different branch port connections.

11. The method according to any one of claims 1 to 10, further comprising:

And the master gateway sends a configuration message to each optical splitter, wherein the configuration message is used for indicating each optical splitter to configure corresponding optical power change parameters for slave gateways connected with different branch ports.

12. A method of generating topology information, the method being applied to an optical communication system including a master gateway, at least one optical splitter, and at least one slave gateway, the master gateway being connected to the at least one optical splitter in a cascade, each of the slave gateways being connected to a branch port of a corresponding optical splitter, the method comprising:

The slave gateway receives a request message sent by the master gateway;

The slave gateway acquires statistical information according to the request message, wherein the statistical information comprises optical power change parameters of the slave gateway, and each optical splitter is different in optical power change parameters configured by the slave gateway and connected with different branch ports;

and the slave gateway sends a response message comprising statistical information to the master gateway so that the master gateway generates topology information according to the response message, wherein the topology information comprises the connection relation between each slave gateway and a branch port of a corresponding optical splitter.

13. The method of claim 12, wherein the at least one optical splitter comprises a first optical splitter, the optical power variation parameter comprising an optical power variation magnitude, the first optical splitter configured to vary the optical power variation magnitude from the gateway for different branch port connections.

14. The method of claim 13, wherein the at least one optical splitter further comprises a second optical splitter configured to vary in amplitude of optical power variation from the gateway for different branch port connections;

The optical power variation parameters further comprise optical power variation frequencies, wherein the first optical splitter configures first optical power variation frequencies for slave gateways connected with all branch ports, the second optical splitter configures second optical power variation frequencies for slave gateways connected with all branch ports, and the first optical power variation frequencies are different from the second optical power variation frequencies.

15. The method of claim 13, wherein the at least one optical splitter further comprises a second optical splitter, the second optical splitter being configured to have different magnitudes of optical power variation for slave gateways to which different branch ports are connected, the magnitudes of optical power variation for slave gateways to which the same port numbers on the first optical splitter and the second optical splitter are connected being the same;

The statistical information also comprises the received signal strength indication RSSI and/or round trip time RTT of the slave gateway, wherein the RSSIs and/or RTTs of the slave gateways connected by the branch ports with the same port numbers on the first optical splitter and the second optical splitter are different.

16. The method of claim 12, wherein the at least one optical splitter comprises a first optical splitter, the optical power variation parameter comprising an optical power variation frequency, the first optical splitter configured to vary the optical power variation frequency from the gateway for different branch port connections.

17. The method of claim 16, wherein the at least one optical splitter further comprises a second optical splitter configured to vary the frequency of optical power changes from the gateway for different branch port connections;

The optical power variation parameters further comprise optical power variation amplitude, wherein the first optical splitter configures first optical power variation amplitude for the slave gateways connected with all branch ports, the second optical splitter configures second optical power variation amplitude for the slave gateways connected with all branch ports, and the first optical power variation amplitude is different from the second optical power variation amplitude.

18. The method of claim 16, wherein the at least one optical splitter further comprises a second optical splitter, the second optical splitter having different frequencies of optical power variation configured for slave gateways to which different branch ports are connected, the first optical splitter and the second optical splitter having the same frequency of optical power variation from the slave gateways to which the same port number of the branch ports is connected;

The statistical information also comprises the received signal strength indication RSSI and/or round trip time RTT of the slave gateway, wherein the RSSIs and/or RTTs of the slave gateways connected by the branch ports with the same port numbers on the first optical splitter and the second optical splitter are different.

19. The method according to claim 15 or 18, wherein the optical power variation parameter is counted by the slave gateway during a first period of time, and wherein the RSSI and/or the RTT is counted by the slave gateway during a second period of time.

20. The method according to any one of claims 12 to 19, wherein the request message and the response message are in an optical network unit management control interface OMCI message format or an operation maintenance administration OAM message format.

21. A method according to any one of claims 12 to 20, wherein the fibres accessed by each branch port of the optical splitter are of thermo-optic material, and the fibres accessed by different branch ports of the optical splitter are configured from the gateway to have different optical power variation parameters by applying different voltages to effect different branch port connections.

22. A primary gateway, comprising: the system comprises a processing unit and a receiving and transmitting unit, wherein the main gateway is connected with at least one optical splitter in a cascading mode, and each slave gateway is connected with a branch port of the corresponding optical splitter;

The receiving and transmitting unit is used for: sending a request message to each slave gateway, wherein the request message is used for requesting each slave gateway to acquire and feed back statistical information, and the statistical information comprises optical power change parameters of the slave gateway, and each optical splitter is different in optical power change parameters configured for the slave gateway connected with different branch ports;

Receiving at least one response message sent from a gateway, wherein the response message comprises the statistical information;

The processing unit is used for: and generating topology information according to the response message, wherein the topology information comprises the connection relation between each slave gateway and a branch port of the corresponding optical splitter.

23. The primary gateway of claim 22, wherein the at least one optical splitter comprises a first optical splitter, the optical power variation parameter comprises an optical power variation magnitude, and the first optical splitter is configured to vary the optical power variation magnitude for slave gateways connected to different branch ports.

24. The primary gateway of claim 23, wherein the at least one optical splitter further comprises a second optical splitter configured to vary in amplitude of optical power variation for slave gateways connected to different branch ports;

The optical power variation parameters further comprise optical power variation frequencies, wherein the first optical splitter configures first optical power variation frequencies for slave gateways connected with all branch ports, the second optical splitter configures second optical power variation frequencies for slave gateways connected with all branch ports, and the first optical power variation frequencies are different from the second optical power variation frequencies.

25. The primary gateway of claim 23, wherein the at least one optical splitter further comprises a second optical splitter, the second optical splitter having different magnitudes of optical power variation configured for the secondary gateway connected to different branch ports, the magnitudes of optical power variation for the secondary gateway connected to the same branch port on the first optical splitter and the second optical splitter being the same;

The statistical information also comprises the received signal strength indication RSSI and/or round trip time RTT of the slave gateway, wherein the RSSIs and/or RTTs of the slave gateways connected by the branch ports with the same port numbers on the first optical splitter and the second optical splitter are different.

26. The primary gateway of claim 22, wherein the at least one optical splitter comprises a first optical splitter, the optical power variation parameter comprises an optical power variation frequency, and the first optical splitter is configured to be different from the gateway for different branch port connections.

27. The primary gateway of claim 26, wherein the at least one optical splitter further comprises a second optical splitter configured to vary the frequency of optical power changes for slave gateways connected to different branch ports;

The optical power variation parameters further comprise optical power variation amplitude, wherein the first optical splitter configures first optical power variation amplitude for the slave gateways connected with all branch ports, the second optical splitter configures second optical power variation amplitude for the slave gateways connected with all branch ports, and the first optical power variation amplitude is different from the second optical power variation amplitude.

28. The primary gateway of claim 26, wherein the at least one optical splitter further comprises a second optical splitter, the second optical splitter having different frequencies of optical power variation configured for the secondary gateway to which different branch ports are connected, the first optical splitter and the second optical splitter having the same frequency of optical power variation for the secondary gateway to which the same port number of the branch ports is connected;

The statistical information also comprises the received signal strength indication RSSI and/or round trip time RTT of the slave gateway, wherein the RSSIs and/or RTTs of the slave gateways connected by the branch ports with the same port numbers on the first optical splitter and the second optical splitter are different.

29. The master gateway according to claim 25 or 28, wherein the optical power variation parameter is counted by the slave gateway during a first period of time, and wherein the RSSI and/or the RTT is counted by the slave gateway during a second period of time.

30. The primary gateway of any of claims 22 to 29, wherein the request message and the response message are in an optical network unit management control interface, OMCI, message format or an operation maintenance administration, OAM, message format.

31. The primary gateway of any one of claims 22 to 30, wherein the optical fiber accessed by each branch port of the optical splitter is made of thermo-optic material, and the optical power variation parameters configured from the gateway for different branch port connections by applying different voltages to the optical fibers accessed by different branch ports of the optical splitter are different.

32. The primary gateway of any of claims 22-31, wherein the transceiver unit is further configured to: and sending a configuration message to each optical splitter, wherein the configuration message is used for indicating each optical splitter to configure corresponding optical power variation parameters for slave gateways connected with different branch ports.

33. A slave gateway, comprising: the system comprises a processing unit and a receiving and transmitting unit, wherein the slave gateway is connected with a branch port of a corresponding optical splitter, and the master gateway is connected with at least one optical splitter in a cascading manner;

The receiving and transmitting unit is used for: receiving a request message sent by the main gateway;

the processing unit is used for: acquiring statistical information according to the request message, wherein the statistical information comprises optical power change parameters of the slave gateway, and each optical splitter is different in optical power change parameters configured for the slave gateway connected with different branch ports;

The receiving and transmitting unit is used for: and sending a response message comprising statistical information to the master gateway, so that the master gateway generates topology information according to the response message, wherein the topology information comprises the connection relation between each slave gateway and a branch port of a corresponding optical splitter.

34. The slave gateway according to claim 33, wherein the at least one optical splitter comprises a first optical splitter, the optical power variation parameter comprises an optical power variation amplitude, and the first optical splitter is configured to be different from the slave gateway for different branch port connections.

35. The slave gateway according to claim 34, wherein the at least one optical splitter further comprises a second optical splitter configured to vary in amplitude of optical power variation for slave gateways to which different branch ports are connected;

The optical power variation parameters further comprise optical power variation frequencies, wherein the first optical splitter configures first optical power variation frequencies for slave gateways connected with all branch ports, the second optical splitter configures second optical power variation frequencies for slave gateways connected with all branch ports, and the first optical power variation frequencies are different from the second optical power variation frequencies.

36. The slave gateway according to claim 34, wherein the at least one optical splitter further comprises a second optical splitter, the second optical splitter is configured to have different optical power variation amplitudes for slave gateways connected to different branch ports, and the optical power variation amplitudes for slave gateways connected to the same branch ports on the first optical splitter and the second optical splitter are the same;

The statistical information also comprises the received signal strength indication RSSI and/or round trip time RTT of the slave gateway, wherein the RSSIs and/or RTTs of the slave gateways connected by the branch ports with the same port numbers on the first optical splitter and the second optical splitter are different.

37. The slave gateway according to claim 33, wherein the at least one optical splitter comprises a first optical splitter, the optical power variation parameter comprising an optical power variation frequency, the first optical splitter configured to be different from the slave gateway for different branch port connections.

38. The slave gateway according to claim 37, wherein the at least one optical splitter further comprises a second optical splitter configured to vary the frequency of optical power changes for slave gateways to which different branch ports are connected;

The optical power variation parameters further comprise optical power variation amplitude, wherein the first optical splitter configures first optical power variation amplitude for the slave gateways connected with all branch ports, the second optical splitter configures second optical power variation amplitude for the slave gateways connected with all branch ports, and the first optical power variation amplitude is different from the second optical power variation amplitude.

39. The slave gateway according to claim 37, wherein the at least one optical splitter further comprises a second optical splitter, the second optical splitter is configured to have different optical power change frequencies for slave gateways connected to different branch ports, and the optical power change frequencies for slave gateways connected to the same branch ports on the first optical splitter and the second optical splitter are the same;

The statistical information also comprises the received signal strength indication RSSI and/or round trip time RTT of the slave gateway, wherein the RSSIs and/or RTTs of the slave gateways connected by the branch ports with the same port numbers on the first optical splitter and the second optical splitter are different.

40. A slave gateway according to claim 36 or 39, wherein the optical power variation parameter is counted by the slave gateway during a first period of time and the RSSI and/or RTT is counted by the slave gateway during a second period of time.

41. The slave gateway according to any one of claims 33 to 40, wherein the request message and the response message are in an optical network unit management control interface OMCI message format or an operation maintenance administration OAM message format.

42. The slave gateway according to any one of claims 33 to 41, wherein the optical fiber accessed by each branch port of the optical splitter is made of thermo-optic material, and the optical power variation parameters configured by the slave gateway for different branch port connections by applying different voltages to the optical fibers accessed by different branch ports of the optical splitter are different.