CN115714936A - Method and device for sequential addressing of slave stations - Google Patents

Abstract

The application provides a method and a device for sequential addressing of slave stations, which are characterized in that the method and the device are applied to a first control system, the first control system comprises a Passive Optical Network (PON), a master station controller and a plurality of slave stations, the PON comprises an optical line terminal and a plurality of optical network units, the plurality of optical network units correspond to the plurality of slave stations one by one, and the method comprises the following steps: the optical line terminal determines the online sequence of a plurality of optical network units; and the optical line terminal informs the master station controller of configuring sequential logical addresses for the plurality of slave stations according to the online sequence of the plurality of optical network units, wherein the logical addresses of any two slave stations are different. The sequential logical addresses are sequentially distributed to the corresponding slave stations through the online of the optical network unit, and when the PON technology is applied to an industrial control system, the time delay and jitter of the slave stations can be reduced based on the point-to-multipoint architecture of the PON technology, and the communication performance of the system is improved.

Description

Sequential addressing method and device for slave stations

technical field

The present application relates to the field of optical communication, and more specifically, to a method and device for sequential addressing of slave stations.

Background technique

In the current fieldbus network structure, the upper computer is connected to the master station controller, and the master station controller is connected to multiple slave stations, and each slave station is connected hand in hand to form a daisy chain architecture. Wherein, in the networking of the hand-in-hand daisy chain, the logical location is consistent with the physical location.

Since each slave station is connected hand in hand, the delay and jitter of the slave stations are accumulated, which will lead to a relatively large delay and jitter of the slave station at the end of the daisy chain, which will lead to poor communication performance of the entire system.

Therefore, how to reduce the delay and jitter of the slave station, and then improve the communication performance of the system is an urgent problem to be solved.

Contents of the invention

The present application provides a sequential addressing method and device for slave stations, which can assign sequential logical addresses to slave stations, and the point-to-multipoint architecture based on PON technology can reduce the delay and jitter of slave stations, and improve the communication performance of the system.

In a first aspect, a sequential addressing method for slave stations is provided, which is applied to a first control system, and the first control system includes a passive optical network (passive optical network, PON), a master station controller (for example, a programmable logic Controller (programmable logic controller, PLC)) and multiple slave stations, PON includes optical line terminal (optical line terminal, OLT) and multiple optical network units (optical network unit, ONU), multiple ONUs and multiple slave stations One to one correspondence. The method may be executed by the OLT, or may also be executed by a chip or circuit for the OLT, which is not limited in the present application. For ease of description, the implementation by the OLT is taken as an example below.

The method includes: the OLT determines the online order of the multiple ONUs; the OLT notifies the PLC to configure sequential logical addresses for the multiple slave stations according to the online order of the multiple ONUs, and the logical addresses of any two slave stations are different.

According to the solution provided by the present application, sequential logical addresses are assigned to corresponding slave stations through the ONU online, thereby reducing the delay and jitter of the slave stations, and improving the communication performance of the system.

Exemplarily, the first control system may be an industrial control system, or other control systems, for allocating sequential addresses to the slave stations, which is not specifically limited in this application.

With reference to the first aspect, in some implementation manners of the first aspect, the OLT determines the online order of multiple ONUs, including: the OLT determines the online order of multiple ONUs according to the distance of multiple first distances, and the multiple first distances are the distances between the multiple ONUs and the OLT, and the multiple first distances correspond to the multiple ONUs one by one.

In this implementation mode, the sequence of ONUs is determined by the distance between the ONUs and the OLT, and sequential logical addresses are assigned to the corresponding slave stations in order to reduce the delay and jitter of the slave stations and improve the communication performance of the system.

Exemplarily, after all the ONUs connected to the entire network go online, the OLT scans each ONU distance, that is, the distance between the OLT and each ONU. For example, the OLT determines through scanning that the distances between ONU x, ONU y, ONU z and the OLT are the closest, the next closest, and the farthest, respectively. Then, the OLT can control each ONU to go online sequentially according to the distance from near to far, that is, ONU x, ONU y, and ONU z go online sequentially. Alternatively, the OLT can control each ONU to go online sequentially according to the distance, that is, ONU z, ONU y, and ONU x go online in sequence.

In this implementation, the logical addresses of multiple slave stations may be sequential, that is, gradually increasing. Alternatively, the sequential logical addresses of the slave stations can also be configured in a gradually decreasing manner.

Optionally, the sequential logical addresses of the slave stations may also be arranged in alphabetical order (for example, English letters), that is, A, B, C....

It should be understood that the above possible implementation manners are merely illustrative descriptions, and should not constitute any limitation to the technical solution of the present application.

With reference to the first aspect, in some implementation manners of the first aspect, the OLT determines the online order of the multiple optical network units according to the distance of the multiple first distances, including: when the i-th among the multiple first distances is the first When the distance is less than the i+1th first distance, the optical line terminal determines that the online sequence of the i-th optical network unit is better than that of the i+1-th optical network unit, and the i-th first distance corresponds to the i-th optical network unit , the i+1th first distance corresponds to the i+1th optical network unit, and i is an integer greater than zero.

In this implementation, the ONU closest to the OLT goes online first, and the corresponding slave station first assigns sequential logical addresses. This is only an exemplary description, and should not be construed as limiting the technical solution of the present application.

Optionally, the ONU farthest from the OLT may also go online first, that is, multiple ONUs go online sequentially from far to near.

It should be understood that in actual industrial scenarios, considering factors such as construction efficiency, labor cost, and technical difficulty, generally, multiple ONUs are controlled to go online sequentially in order of distance from near to far, and the slave stations connected to the ONU are sequentially allocated logical address.

Exemplarily, the distances between ONU x, ONU y, ONU z and the OLT are respectively the closest, the next closest and the farthest. Then, the OLT controls each ONU to go online sequentially in order of distance from near to far, that is, ONU x, ONU y, and ONU z.

With reference to the first aspect, in some implementation manners of the first aspect, the multiple first distances are preconfigured.

In this embodiment of the present application, the multiple first distances are multiple distances between the multiple ONUs and the OLT. The multiple first distances are artificially constructed and may be pre-configured so that the OLT can identify ONUs with different distances.

With reference to the first aspect, in some implementations of the first aspect, the multiple first distances are determined according to the extension length of the trunk optical fiber of the unequal beam splitter; or, the multiple first distances are determined according to the equal beam ratio The distance between the input port of the device and the multiple output ports is determined.

In this implementation manner, it is further explained that the artificially constructed distance difference can be realized by extending the length of the main optical fiber of the optical splitter. Exemplarily, based on the unequal ratio optical networking structure, the extension length of the trunk fiber of the optical splitter is the first distance; based on the equal ratio optical networking structure, the distance between the input port and the multiple output ports in the optical splitter can be Think of as multiple first distances.

With reference to the first aspect, in some implementation manners of the first aspect, the OLT controls the multiple ONUs to go online sequentially according to the online sequence of the multiple ONUs.

Exemplarily, it is assumed that the distance between the ONU and the OLT is ONU x, ONU y, and ONU z from near to far. Then, the OLT can first allocate a non-empty Bwmap to the nearest ONU x through software control, and allocate an empty Bwmap to the downlink ONU y and ONU z, so that ONU x can go online. After the PLC allocates a logical address for ONU x, it controls ONU y to go online by allocating a non-empty Bwmap. By analogy, until all ONUs are assigned logical addresses and so on.

In conjunction with the first aspect, in some implementations of the first aspect, the OLT configures a plurality of ONU IDs for a plurality of ONUs in sequence according to the online order of a plurality of ONUs, and a plurality of ONU IDs are associated with a plurality of slave stations one by one Correspondingly, multiple ONU IDs are in one-to-one correspondence with multiple ONUs, and any two optical network unit identifiers are different.

In other words, the OLT allocates the ONU ID corresponding to each ONU according to the multiple ONU distances obtained through scanning.

Exemplarily, an ID is assigned to each ONU according to the distance measured by the OLT. That is, the OLT identifies the nearest, the next closest, and the farthest ONU, and sorts each ONU in turn. For example, if the distance between ONU x and the OLT is the shortest, then the ONUID marked with ONU x is 1. Similarly, if the distance between ONU y and the OLT is the second closest, then the ONU ID marking ONU y is 2. If the distance between ONU z and the OLT is the farthest, then the ONU ID marked with ONU z is 3.

With reference to the first aspect, in some implementation manners of the first aspect, the multiple ONU IDs include a first ONU ID, the multiple slave stations include the first slave station, and the first ONU ID corresponds to the first slave station. Wherein, the corresponding relationship between the first ONU ID and the first slave station can be determined according to one or more of the serial number ONU SN of the first optical network unit, the distance between the first ONU and the OLT, and the first ONU is one of multiple ONUs One, the first ONU corresponds to the first slave station.

In conjunction with the first aspect, in some implementations of the first aspect, the OLT notifies the PLC to configure sequential logical addresses for the multiple slave stations according to the online order of the multiple ONUs, including: the OLT sends a notification message to the PLC, and the notification message includes For multiple ONU IDs, the notification message is used to instruct the PLC to configure sequential logical addresses for multiple slave stations according to the multiple ONU IDs.

Exemplarily, after the OLT makes the nearest ONU x go online through software control, the OLT needs to send the notification message to the PLC, which is used to indicate that the nearest ONU x is online, and is used to instruct the PLC to connect the slave station device connected to the ONU x Assign sequential logical addresses. Similarly, when the next nearest ONU y goes online, the OLT also needs to send a notification message to the PLC to indicate that the next closest ONU y is online, and notify the PLC to assign sequential logical addresses to the slave devices connected to the ONU y. And so on, until all ONUs obtain sequential logical addresses.

Specifically, the PLC sends allocation information to the slave stations. Wherein, the allocation information is used to allocate sequential logical addresses to each slave station, and the allocation information includes a plurality of logical address information. Wherein, there is a one-to-one correspondence relationship between each slave station and each logic address.

Exemplarily, the PLC sequentially assigns sequential logical addresses to the slave stations connected to the online ONUs until every slave station goes online. For example, the PLC assigns logical address 1 to the slave station 1 attached to the ONU x closest to the OLT. Then, the PLC assigns a logical address 2 to the slave station 2 attached to the ONU y closest to the OLT. The PLC assigns a logical address of 3 to the slave station 3 attached to the ONU z that is farthest from the OLT. By analogy, until all the slave stations are assigned sequential logical address information.

In a second aspect, a slave station sequential addressing device is provided, which is applied to a first control system, and the first control system includes a passive optical network (passive optical network, PON), a master station controller (for example, a programmable logic Controller (programmable logic controller, PLC)) and multiple slave stations, PON includes optical line terminal (optical line terminal, OLT) and multiple optical network units (optical network unit, ONU), multiple ONUs and multiple slave stations One to one correspondence.

The device includes a processing unit, which is used for: the OLT determines the online order of the multiple ONUs; the OLT notifies the PLC to configure the logical addresses of the multiple slave stations according to the online order of the multiple ONUs, and the logical addresses of any two slave stations The address is different.

According to the solution provided by the present application, sequential logical addresses are assigned to corresponding slave stations through the ONU online, thereby reducing the delay and jitter of the slave stations, and improving the communication performance of the system.

Exemplarily, the first control system may be an industrial control system, or other control systems, for allocating sequential addresses to the slave stations, which is not specifically limited in this application.

With reference to the second aspect, in some implementations of the second aspect, the OLT determining the online order of the multiple ONUs includes: the OLT determines the online order of the multiple ONUs according to the distance of the multiple first distances, and the multiple first distances are the distances between the multiple ONUs and the OLT, and the multiple first distances correspond to the multiple ONUs one by one.

In this implementation mode, the sequence of ONUs is determined by the distance between the ONUs and the OLT, and sequential logical addresses are assigned to the corresponding slave stations in order to reduce the delay and jitter of the slave stations and improve the communication performance of the system.

Exemplarily, after all the ONUs connected to the entire network go online, the OLT scans each ONU distance, that is, the distance between the OLT and each ONU. For example, the OLT determines through scanning that the distances between ONU x, ONU y, ONU z and the OLT are the closest, the next closest, and the farthest, respectively. Then, the OLT can control each ONU to go online sequentially according to the distance from near to far, that is, ONU x, ONU y, and ONU z go online sequentially. Alternatively, the OLT can control each ONU to go online sequentially according to the distance, that is, ONU z, ONU y, and ONU x go online in sequence.

In this implementation, the logical addresses of multiple slave stations may be sequential, that is, gradually increasing. Alternatively, the sequential logical addresses of the slave stations can also be configured in a gradually decreasing manner.

Optionally, the sequential logical addresses of the slave stations may also be arranged in alphabetical order (for example, English letters), that is, A, B, C....

It should be understood that the above possible implementation manners are merely illustrative descriptions, and should not constitute any limitation to the technical solution of the present application.

With reference to the second aspect, in some implementations of the second aspect, the processing unit is further configured to: when the i-th first distance among the multiple first distances is smaller than the i+1-th first distance, the optical line The terminal determines that the online order of the i-th optical network unit is better than that of the i+1-th optical network unit, the i-th first distance corresponds to the i-th optical network unit, and the i+1-th first distance corresponds to the i+1-th Corresponding to the optical network unit, i is an integer greater than zero.

In this implementation, the ONU closest to the OLT goes online first, and the corresponding slave station first assigns sequential logical addresses. This is only an exemplary description, and should not be construed as limiting the technical solution of the present application.

Optionally, the ONU farthest from the OLT may also go online first, that is, multiple ONUs go online sequentially from far to near.

It should be understood that in actual industrial scenarios, considering factors such as construction efficiency, labor cost, and technical difficulty, generally, multiple ONUs are controlled to go online sequentially in order of distance from near to far, and the slave stations connected to the ONU are sequentially allocated logical address.

Exemplarily, the distances between ONU x, ONU y, ONU z and the OLT are respectively the closest, the next closest and the farthest. Then, the OLT controls each ONU to go online sequentially in order of distance from near to far, that is, ONU x, ONU y, and ONU z.

With reference to the second aspect, in some implementation manners of the second aspect, the multiple first distances are preconfigured.

In this embodiment of the present application, the multiple first distances are multiple distances between the multiple ONUs and the OLT. The multiple first distances are artificially constructed and may be pre-configured so that the OLT can identify ONUs with different distances.

With reference to the second aspect, in some implementations of the second aspect, the multiple first distances are determined according to the extension length of the trunk optical fiber of the unequal beam splitter; or, the multiple first distances are determined according to the equal beam ratio The distance between the input port of the device and the multiple output ports is determined.

In this implementation manner, it is further explained that the artificially constructed distance difference can be realized by extending the length of the main optical fiber of the optical splitter. Exemplarily, based on the unequal ratio optical networking structure, the extension length of the trunk fiber of the optical splitter is the first distance; based on the equal ratio optical networking structure, the distance between the input port and the multiple output ports in the optical splitter can be Think of as multiple first distances.

With reference to the second aspect, in some implementation manners of the second aspect, the processing unit is further used for the OLT to control the multiple ONUs to go online sequentially according to the online sequence of the multiple ONUs.

Exemplarily, it is assumed that the distance between the ONU and the OLT is ONU x, ONU y, and ONU z from near to far. Then, the OLT can first allocate a non-empty Bwmap to the nearest ONU x through software control, and allocate an empty Bwmap to the ONU y and ONU z connected below, so that ONU x goes online first. After the PLC allocates a logical address for ONU x, it controls ONUy to go online by allocating a non-empty Bwmap. By analogy, until all ONUs are assigned logical addresses and so on.

In conjunction with the second aspect, in some implementations of the second aspect, the processing unit is also used for the OLT to sequentially configure multiple ONUs for multiple ONUs according to the online order of multiple ONUs. Multiple ONU IDs, multiple ONU IDs One-to-one correspondence with multiple slave stations, one-to-one correspondence between multiple ONU IDs and multiple ONUs, and any two optical network unit identifiers are different.

In other words, the OLT allocates the ONU ID corresponding to each ONU according to the multiple ONU distances obtained through scanning.

Exemplarily, an ID is assigned to each ONU according to the distance measured by the OLT. That is, the OLT identifies the nearest, the next closest, and the farthest ONU, and sorts each ONU in turn. For example, if the distance between ONU x and the OLT is the shortest, then the ONUID marked with ONU x is 1. Similarly, if the distance between ONU y and the OLT is the second closest, then the ONU ID marking ONU y is 2. If the distance between ONU z and the OLT is the farthest, then the ONU ID marked with ONU z is 3.

With reference to the second aspect, in some implementation manners of the second aspect, the multiple ONU IDs include a first ONU ID, the multiple slave stations include the first slave station, and the first ONU ID corresponds to the first slave station. Wherein, the corresponding relationship between the first ONU ID and the first slave station can be determined according to one or more of the serial number ONU SN of the first optical network unit, the distance between the first ONU and the OLT, and the first ONU is one of multiple ONUs One, the first ONU corresponds to the first slave station.

With reference to the second aspect, in some implementations of the second aspect, the device further includes a transceiver unit, configured for the OLT to send a notification message to the PLC, where the notification message includes multiple ONU IDs, and the notification message is used to instruct the PLC to An ONUD configures sequential logical addresses for multiple slave stations in turn.

Exemplarily, after the OLT makes the nearest ONU x go online through software control, the OLT needs to send the notification message to the PLC, which is used to indicate that the nearest ONU x is online, and is used to instruct the PLC to connect the slave station device connected to the ONU x Assign sequential logical addresses. Similarly, when the next nearest ONU y goes online, the OLT also needs to send a notification message to the PLC to indicate that the next closest ONU y is online, and notify the PLC to assign sequential logical addresses to the slave devices connected to the ONU y. And so on, until all ONUs obtain sequential logical addresses.

Specifically, the PLC sends allocation information to the slave stations. Wherein, the allocation information is used to allocate sequential logical addresses to each slave station, and the allocation information includes a plurality of logical address information. Wherein, there is a one-to-one correspondence relationship between each slave station and each logic address.

Exemplarily, the PLC sequentially assigns sequential logical addresses to the slave stations connected to the online ONUs until every slave station goes online. For example, the PLC assigns logical address 1 to the slave station 1 attached to the ONU x closest to the OLT. Then, the PLC assigns a logical address 2 to the slave station 2 attached to the ONU y closest to the OLT. The PLC assigns a logical address of 3 to the slave station 3 attached to the ONU z that is farthest from the OLT. By analogy, until all the slave stations are assigned sequential logical address information.

In a third aspect, the present application provides an optical communication device, including at least one processor, and the at least one processor is used to execute instructions, so that the optical communication device performs the method in the first aspect or any possible implementation thereof .

In a fourth aspect, the present application provides an optical communication device, including a processor and a communication interface, the communication interface is used to receive a signal and transmit the received signal to the processor, and the processor processes the signal, The communication device is configured to execute the method in the first aspect or any possible implementation thereof.

Optionally, the above-mentioned communication interface may be an interface circuit, an input/output interface, etc., and the processor may be a processing circuit, a logic circuit, or the like.

Optionally, the communication device described in the fourth aspect may be a chip or an integrated circuit.

In a fifth aspect, an optical communication device is provided, including: various modules or units for implementing the method in the first aspect or any possible implementation manner of the first aspect.

In a sixth aspect, an optical communication system is provided, including: an optical line terminal, configured to execute the method in the foregoing first aspect or any possible implementation manner of the first aspect.

In a seventh aspect, the present application provides a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium, and when the computer instructions are run on a computer, as in the first aspect or any possible implementation thereof, method is executed.

In an eighth aspect, a chip is provided, including at least one processor, the at least one processor is coupled with a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the installed The optical line terminal of the system-on-a-chip executes the method in the foregoing first aspect or any possible implementation manner of the first aspect.

Wherein, the chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

In a ninth aspect, the present application provides a computer program product, the computer program product including computer program code, when the computer program code is run on a computer, the method in the first aspect or any possible implementation thereof be executed.

According to the solution of the embodiment of the present application, aiming at the problem that the communication performance of the entire system is not high due to the excessive delay and jitter of the slave station in the daisy chain networking, a method and device for sequential addressing of the slave station are provided, and PON technology is introduced One-hop direct feature. By artificially constructing the distance difference between the OLT and each ONU, when the master station controller scans the slave stations, it can assign sequential logical addresses to the connected slave stations according to the distance between the OLT and each ONU, ensuring the slave stations The physical address corresponds to the logical address. This implementation method assigns sequential logical addresses to the corresponding slave stations through the online of the optical network unit, and when PON technology is applied to the industrial control system, the point-to-multipoint architecture based on PON technology can reduce the delay and jitter of the slave stations. Improve the communication performance of the system.

Description of drawings

Fig. 1 is a schematic diagram of an example of the current field bus network structure.

FIG. 2 is a schematic diagram of an example of an industrial optical bus solution architecture applicable to the present application.

Fig. 3 is a schematic diagram of an example of a sequential addressing method for slave stations applicable to the present application.

Fig. 4 is a schematic diagram of another example of the sequential addressing method for slave stations applicable to the present application.

Fig. 5 is a schematic diagram of an example of determining the corresponding relationship between a logical address and a physical address of a slave station applicable to the present application.

Fig. 6 is a schematic diagram of another example of determining the corresponding relationship between a logical address and a physical address of a slave station applicable to the present application.

Fig. 7 is a schematic diagram of an example of an unequal-ratio optical networking structure applicable to the present application.

FIG. 8 is a schematic diagram of an example of an equal-ratio optical networking structure applicable to the present application.

Fig. 9 is a schematic diagram of an example of a slave station sequential addressing device to which this application is applied.

Fig. 10 is a schematic diagram of another example of a slave station sequential addressing device applicable to the present application.

Detailed ways

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

Passive optical network (PON) is a broadband optical access technology and a point-to-multipoint physical topology. Wherein, the PON network may be composed of an optical line terminal (optical line terminal, OLT), a passive optical distribution network (optical distribution network, ODN), and multiple optical network units (optical network unit, ONU). PON has the advantages of optical fiber resource sharing, OLT port sharing, saving equipment room investment, high equipment security, fast network construction speed, and low comprehensive network construction cost.

In the application of PON technology, the OLT device is the core component of the optical access network (OAN), which is equivalent to a switch or router in a traditional communication network, and is also a multi-service providing platform. It is generally placed at the central office to provide the optical fiber interface of the user-oriented passive optical fiber network. The main functions of the OLT equipment include: connecting to the upper layer network to complete the upstream access of the PON network; connecting to the user end equipment ONU through the ODN network (composed of optical fibers and passive optical splitters). Realize functions such as control, management, and distance measurement of the ONU at the user end.

The ONU device is the user end device in the optical network. It is placed at the user end and used in conjunction with the OLT to realize the functions of the second layer and the third layer of the Ethernet, and provide users with voice, data and multimedia services. Its main functions include: select to receive data sent by OLT; respond to management commands sent by OLT, and make corresponding adjustments; cache user's Ethernet data and send them in the upstream direction in the sending window allocated by OLT; and Additional user management features.

It should be understood that both the OLT device and the ONU device are devices integrating optoelectronics.

Fig. 1 is a schematic diagram of an example of the current field bus network structure. As shown in Figure 1, in the industrial field, the typical industrial control architecture of the field-level production network is that the host computer is connected to the master station controller, and the master station controller is connected to slave station 1, slave station 2, slave station 3, etc., and each slave station Connect hand in hand to form a daisy chain architecture. In an industrial application scenario, a master controller controls multiple slave slaves or input/output (IO). As it involves the control of mechanical devices, each slave station has a strict installation position and corresponding number. Among them, the installation location and number need to be accurately identified and marked in the master station controller.

First of all, after the construction workers connect the master station controller and multiple slave stations according to the physical drawings, the corresponding logical network diagram can be displayed on the host computer. Subsequently, the manufacturer's programmers debug the software according to the logical and physical locations of the equipment.

It should be noted that, at this time, the positions of the logical networking and the physical networking are in one-to-one correspondence. In addition, this daisy-chain network structure is easy for workers to construct. At the same time, it is not easy for programmers to make mistakes when debugging each slave station according to the daisy chain network structure.

At present, the connection between the Ethernet control automation technology EtherCAT master and slave devices often adopts a hand-in-hand daisy chain method. Among them, after the electrical engineer or electrician completes the communication connection according to the construction drawings, the initial state of each slave station is the same.

It should be noted that each slave station does not have an address when it goes online for the first time, and needs to be configured and addressed. In the specific implementation process, the controller debugger can scan out the slave stations subordinate to the master station controller one by one through the bus protocol (for example, EtherCAT) on the host computer, and automatically address each slave station, and then realize each slave station. One-to-one correspondence between physical relationship and logical relationship.

Specifically, the sequential logical address configuration of the slave station includes: first, scan the number of slave station devices and the network topology of the entire network through broadcast addressing; then, configure parameters for each slave station according to the results of broadcast addressing; finally, pass The location addressing method identifies each slave station sequentially, and assigns addresses to each slave station sequentially.

In the above implementation manner, the logical position and the physical position of the hand-in-hand daisy chain networking structure are consistent. However, since each slave station is connected hand in hand, in the daisy chain networking structure, the delay and jitter of the slave stations are accumulated. Then the delay and jitter of the slave station at the end of the daisy chain are relatively large, which leads to poor communication performance of the entire system.

Aiming at the problem of low communication performance in daisy chain networking, we can apply PON technology in industrial control systems to reduce system delay and jitter. Since the networking architecture of the PON system is a point-to-multipoint (point 2 multiple point, P2MP) connection, all slave stations are directly connected to the master station controller by one hop, so the delay and jitter of each slave station can be determined of. However, this PON architecture also presents construction challenges. Because the online sequence of the slave stations is uncertain, the master station controller scans the slave stations at random, and it is impossible to address the slave stations sequentially. This will result in a one-to-one correspondence between the physical relationship and the logical relationship of the slave stations, so human intervention in the master station is required for configuration.

Therefore, in view of the problem of sequential addressing of slave stations in the application of PON technology in industrial scenarios; the problems of high technical difficulty, low construction efficiency and increased labor costs in the application of PON technology in industrial scenarios; and the problem of slave stations at the end of the daisy chain structure chain There is currently no solution to the problem of large delay and jitter.

In view of this, this application proposes a method and device for sequential addressing of slave stations, that is, a technical solution that can automatically identify the sequence of each ONU in the PON system and address the slave stations sequentially, including:

First of all, artificially constructed distance difference. That is to extend the length of the backbone fiber of the unequal optical device in the unequal optical network structure and the length of the backbone optical fiber of the equal optical device in the equal optical network structure to artificially increase the distance difference between each ONU and the OLT. This enables the OLT to identify ONUs at different distances.

Then, each ONU is sorted according to the distance difference between the OLT and each ONU. That is, the OLT measures the distance to each ONU, calculates and controls the online order of each ONU according to the distance (ONU distance). Generally, each ONU goes online according to the order of distance from shortest to farthest.

Finally, sequential addresses are assigned to the individual slaves in turn. That is, the addresses of the slave devices are identified in sequence according to the distance. That is to say, according to the order in which each ONU goes online, sequential addresses are assigned to the slave station devices connected downstream of the ONU in turn, so as to realize the one-to-one correspondence between the logical position and the physical position of each slave station.

Exemplarily, in this embodiment of the application, each ONU is subordinate to one slave station. That is to ensure that there is a one-to-one correspondence between each ONU and each slave station.

In order to facilitate understanding of the embodiments of the present application, the following descriptions are made.

In the present application, "for indicating" may include both for direct indicating and for indirect indicating. When describing a certain indication information for indicating A, it may include that the indication information directly indicates A or indirectly indicates A, but it does not mean that A must be carried in the indication information.

In addition, specific indication manners may also be various existing indication manners, such as but not limited to, the above indication manners and various combinations thereof. For specific details of various indication manners, reference may be made to the prior art, which will not be repeated herein. It can be known from the above that, for example, when multiple pieces of information of the same type need to be indicated, there may be a situation where different information is indicated in different ways. In the specific implementation process, the required indication method can be selected according to the specific needs. The embodiment of the present application does not limit the selected indication method. In this way, the indication method involved in the embodiment of the present application should be understood as covering the There are various methods by which a party can obtain the information to be indicated.

It can be understood that, in the embodiments shown below, "first", "second" and various numbers are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The sequence numbers of the processes below do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.

In this application, "at least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three kinds of relationships. For example, A and/or B may mean that A exists alone, A and B exist simultaneously, and B exists alone. Wherein, A and B may be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (one) of a, b and c may represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c. Wherein, a, b and c can be single or multiple.

In this embodiment of the application, descriptions such as "when", "in the case of ..." and "if" all refer to the corresponding processing by the device under certain objective circumstances, not a limited time, and Nor does it require that the device must have a judgment action during implementation, nor does it mean that there are other restrictions.

The method for sequential addressing of slave stations in the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 2 is a schematic diagram of an example of an industrial optical bus solution architecture applicable to the present application. As shown in Figure 2, in the actual industrial optical network application scenario, the OLT can be called the optical head end, the ONU can be called the optical terminal, and the optical head end is connected to multiple optical terminal modules. Each optical terminal module is connected with a slave station device.

Exemplarily, a master station controller (for example, programmable logic controller PLC) is connected with an optical head end, and an optical head end is connected with a plurality of optical terminal modules, and each optical terminal module is respectively connected to the slave station IO, Servo, sensor, etc.

In the framework of the industrial optical network, one PLC can control multiple slave stations, that is, the connection mode of point-to-multipoint P2MP.

Fig. 3 is a schematic diagram of an example of a sequential addressing method for slave stations applicable to the present application. Applied to a first control system comprising a passive optical network PON, a master station controller (e.g., a programmable logic controller PLC) and a plurality of slave stations, the PON comprising an optical line terminal OLT and a plurality of optical networks Unit ONU, multiple ONUs correspond to multiple slave stations one by one. The method may be executed by the OLT, or may also be executed by a chip or circuit for the OLT, which is not limited in the present application. For ease of description, the implementation by the OLT is taken as an example below.

Exemplarily, the first control system may be an industrial control system, or other control systems, for allocating sequential addresses to the slave stations, which is not specifically limited in this application.

As shown in Figure 3, the specific implementation step 300 includes:

S310, the OLT determines the online sequence of the multiple ONUs;

In a possible implementation, the OLT determines the online order of multiple ONUs according to the distances of multiple first distances, the multiple first distances are the distances between the multiple ONUs and the OLT, and the multiple first distances and multiple One-to-one correspondence between ONUs.

In this implementation mode, the sequence of ONUs is determined by the distance between the ONUs and the OLT, and sequential logical addresses are assigned to the corresponding slave stations in order to reduce the delay and jitter of the slave stations and improve the communication performance of the system.

Exemplarily, after all the ONUs connected to the entire network go online, the OLT scans each ONU distance, that is, the distance between the OLT and each ONU. For example, the OLT determines through scanning that the distances between ONU x, ONU y, ONU z and the OLT are the closest, the next closest, and the farthest, respectively. Then, the OLT can control each ONU to go online sequentially according to the distance from near to far, that is, ONU x, ONU y, and ONU z go online sequentially. Alternatively, the OLT can control each ONU to go online sequentially according to the distance, that is, ONU z, ONU y, and ONU x go online in sequence.

In this implementation, the logical addresses of multiple slave stations may be sequential, that is, gradually increasing. Alternatively, the sequential logical addresses of the slave stations can also be configured in a gradually decreasing manner.

In another possible implementation manner, the OLT determines the online order of multiple optical network units according to the distances of multiple first distances, including: when the i-th first distance among the multiple first distances is smaller than the i+1-th When the distance is 1, the optical line terminal determines that the online order of the i-th optical network unit is better than that of the i+1-th optical network unit, the i-th first distance corresponds to the i-th optical network unit, and the i+1-th optical network unit first The distance corresponds to the i+1th optical network unit, and i is an integer greater than zero.

In this implementation, the ONU closest to the OLT goes online first, and the corresponding slave station first assigns sequential logical addresses. This is only an exemplary description, and should not be construed as limiting the technical solution of the present application.

Optionally, the ONU farthest from the OLT may also go online first, that is, multiple ONUs go online sequentially from far to near.

It should be understood that in actual industrial scenarios, considering factors such as construction efficiency, labor cost, and technical difficulty, generally, multiple ONUs are controlled to go online sequentially in order of distance from near to far, and the slave stations connected to the ONU are sequentially allocated logical address.

Exemplarily, the distances between ONU x, ONU y, ONU z and the OLT are respectively the closest, the next closest and the farthest. Then, the OLT controls each ONU to go online sequentially in order of distance from near to far, that is, ONU x, ONU y, and ONU z.

It should be noted that the multiple first distances are pre-configured.

In this embodiment of the present application, the multiple first distances are multiple distances between the multiple ONUs and the OLT. The multiple first distances are artificially constructed and may be pre-configured so that the OLT can identify ONUs with different distances.

Exemplarily, the multiple first distances are determined according to the extended length of the trunk fiber of the unequal optical splitter; or, the multiple first distances are determined according to the distance between the input port and the multiple output ports of the equal optical splitter The distance is fixed.

In this implementation manner, it is further explained that the artificially constructed distance difference can be realized by extending the length of the main optical fiber of the optical splitter. Exemplarily, based on the unequal ratio optical networking structure, the extension length of the trunk fiber of the optical splitter is the first distance; based on the equal ratio optical networking structure, the distance between the input port and the multiple output ports in the optical splitter can be Think of as multiple first distances.

In yet another possible implementation manner, the OLT controls the multiple ONUs to go online sequentially according to the online sequence of the multiple ONUs.

Exemplarily, it is assumed that the distance between the ONU and the OLT is ONU x, ONU y, and ONU z from near to far. Then, the OLT can first assign a non-empty Bwmap to the nearest ONU x through software control, and assign an empty Bwmap to the ONU y and ONU z connected below, so that ONU x goes online first. After the PLC allocates a logical address for ONU x, it controls ONUy to go online by allocating a non-empty Bwmap. By analogy, until all ONUs are assigned logical addresses and so on.

In another possible implementation, the OLT configures multiple ONU IDs for multiple ONUs in sequence according to the online order of multiple ONUs. Multiple ONU IDs correspond to multiple slave stations one by one, and multiple ONU IDs correspond to multiple There is a one-to-one correspondence between each ONU, and any two optical network unit identifiers are different.

In other words, the OLT allocates the ONU ID corresponding to each ONU according to the multiple ONU distances obtained through scanning.

Exemplarily, an ID is assigned to each ONU according to the distance measured by the OLT. That is, the OLT identifies the nearest, the next closest, and the farthest ONU, and sorts each ONU in turn. For example, if the distance between ONU x and the OLT is the shortest, then the ONUID marked with ONU x is 1. Similarly, if the distance between ONU y and the OLT is the second closest, then the ONU ID marking ONU y is 2. If the distance between ONU z and the OLT is the farthest, then the ONU ID marked with ONU z is 3.

As an example but not a limitation, the multiple ONU IDs include a first ONU ID, the multiple slave stations include a first slave station, and the first ONU ID corresponds to the first slave station. Wherein, the corresponding relationship between the first ONU ID and the first slave station is determined according to one or more of the serial number ONU SN of the first optical network unit, the distance between the first ONU and the OLT, and the first ONU is a plurality of ONUs One of them, the first ONU corresponds to the first slave station.

S320, the OLT notifies the PLC to configure sequential logical addresses for the multiple slave stations according to the online order of the multiple ONUs.

Among them, the logical addresses of any two slave stations are different.

According to the solution provided by the present application, sequential logical addresses are assigned to corresponding slave stations through the ONU online, thereby reducing the delay and jitter of the slave stations, and improving the communication performance of the system.

Optionally, the sequential logical addresses of the slave stations may also be arranged in alphabetical order (for example, English letters), that is, A, B, C....

It should be understood that the above possible implementation manners are merely illustrative descriptions, and should not constitute any limitation to the technical solution of the present application.

In a possible implementation, the OLT notifies the PLC to configure sequential logical addresses for multiple slave stations according to the online order of multiple ONUs, including: the OLT sends a notification message to the PLC, the notification message includes multiple ONU IDs, and the notification message uses It is used to instruct the PLC to configure sequential logical addresses for multiple slave stations according to multiple ONU IDs.

Exemplarily, after the OLT makes the nearest ONU x go online through software control, the OLT needs to send the notification message to the PLC, which is used to indicate that the nearest ONU x is online, and is used to instruct the PLC to connect the slave station device connected to the ONU x Assign sequential logical addresses. Similarly, when the next nearest ONU y goes online, the OLT also needs to send a notification message to the PLC to indicate that the next closest ONU y is online, and notify the PLC to assign sequential logical addresses to the slave devices connected to the ONU y. And so on, until all ONUs obtain sequential logical addresses.

Specifically, the PLC sends allocation information to the slave stations. Wherein, the allocation information is used to allocate sequential logical addresses to each slave station, and the allocation information includes a plurality of logical address information. Wherein, there is a one-to-one correspondence relationship between each slave station and each logic address.

Exemplarily, the PLC sequentially assigns sequential logical addresses to the slave stations connected to the online ONUs until every slave station goes online. For example, the PLC assigns logical address 1 to the slave station 1 attached to the ONU x closest to the OLT. Then, the PLC assigns a logical address 2 to the slave station 2 attached to the ONU y closest to the OLT. The PLC assigns a logical address of 3 to the slave station 3 attached to the ONU z that is farthest from the OLT. By analogy, until all the slave stations are assigned sequential logical address information.

Fig. 4 is a schematic diagram of another example of the sequential addressing method for slave stations applicable to the present application. According to the artificially constructed distance difference between the OLT and each ONU, and according to the distance difference to control the online order of the ONUs in the entire network, and according to the order in which the ONUs go online, the sequential logical addresses are assigned to the slave devices connected downstream of the ONU to realize the slave station There is a one-to-one correspondence between the logical location of the device and the physical location. Among them, the optical head end and the optical terminal belong to a one-to-many P2MP architecture. As shown in Figure 4, the specific interactive process 400 of the master station controller (for example, taking the programmable logic controller PLC as an example), the optical head end OLT, the optical terminal ONU, and the sequential address assignment of the slave station includes:

S410, the programmable logic controller PLC sends configuration information to the OLT at the optical head end.

Correspondingly, the OLT receives configuration information from the PLC.

Wherein, the configuration information includes the slave station authentication information and the slave station ID. This implementation can determine the correspondence between the ONU ID and the slave station ID.

S420, the optical terminal ONU goes online.

It should be noted that, in the embodiment of the present application, the success of the ONU online means that the ONU can be identified on the OLT. At this point, the OLT and the ONU can communicate normally.

Wherein, the specific implementation manner of the ONU going online may include: first, the OLT sends a downlink frame to the ONU, including network configuration parameters. Then, the OLT sends a request message to the ONU for requesting the serial number ONU SN. After the OLT receives the ONU SN, the OLT continues to send downlink frames to the ONU, including the ONU ID. At the same time, the OLT sends a ranging request to the ONU until the OLT receives the ranging result from the ONU.

S430. The OLT separately scans the ONU distance of each ONU connected to the entire network.

Exemplarily, after all the ONUs connected to the entire network go online, the OLT scans each ONU distance, that is, the distance between the OLT and each ONU. For example, the OLT determines through scanning that the distances between ONU x, ONU y, ONU z and the OLT are the closest, the next closest, and the farthest, respectively.

It should be noted that, considering the accuracy and error of PON ranging, the distance between each ONU and the OLT may be relatively close. Then, there may still be errors in the subsequent ranging and logical address allocation sequence. Therefore, before step S430, it is necessary to artificially construct the distance difference between the OLT and each ONU.

As an example but not a limitation, the distance difference between each ONU and the OLT is increased by extending the length of the main optical fiber in the optical splitter (eg, unequal optical splitter or equal optical splitter).

S440. The OLT allocates an ONU ID corresponding to each ONU according to the multiple ONU distances obtained through scanning.

Exemplarily, an ID is assigned to each ONU according to the distance measured by the OLT. That is, the OLT identifies the nearest, the next closest, and the farthest ONU, and sorts each ONU in turn. For example, if the distance between ONU x and the OLT is the shortest, then the ONUID marked with ONU x is 1. Similarly, if the distance between ONU y and the OLT is the second closest, then the ONU ID marking ONU y is 2. If the distance between ONU z and the OLT is the farthest, then the ONU ID marked with ONU z is 3.

S450, the OLT sends the corresponding ONU ID to each ONU.

Correspondingly, each ONU receives multiple ONU IDs from the OLT.

It should be understood that each ONU corresponds to an ONU ID, and any two ONU IDs are different.

Exemplarily, this implementation can achieve ONU x, ONU y, and ONU z to obtain ONU IDs of 1, 2, and 3 respectively, and further determine the distance between the OLT and each ONU from near to far.

S460, the OLT controls each ONU through software to go online sequentially according to the ONU ID from small to large.

In other words, the OLT assigns the online order of each ONU according to the distance between each ONU and the OLT, from near to far.

Exemplarily, the OLT controls the ONU x to go online first by allocating a non-empty Bwmap to the downstream ONU x and allocating an empty Bwmap to the downstream ONU y and ONU z. For example, the nearest ONU x is first brought online through software control. After ONU x is assigned a logical address, a non-empty Bwmap is assigned to ONU y to control ONU y to go online. By analogy, until all ONUs are assigned logical addresses and so on.

S470, the OLT sends a notification message to the PLC.

Correspondingly, the PLC receives the notification message from the OLT.

Wherein, the notification message is used to indicate that the ONU goes online successfully, and to notify the PLC to sequentially assign addresses to the slave stations connected to the ONU.

Exemplarily, in the above step S460, after the nearest ONU x goes online through software control, the OLT needs to send the notification message to the PLC, which is used to indicate that the nearest ONU x goes online, and is used to instruct the PLC to go online for the ONU x. Linked slave devices are assigned sequential logical addresses. Similarly, when the next nearest ONU y goes online, the OLT also needs to send a notification message to the PLC to indicate that the next closest ONU y is online, and notify the PLC to assign sequential logical addresses to the slave devices connected to the ONU y. And so on, until all ONUs obtain sequential logical addresses.

S480, the slave station sends data dictionary information to the PLC.

Correspondingly, the PLC receives the data dictionary information from the slave station.

It should be noted that, by exchanging data dictionary information between the PLC and the slave trunk, the PLC can obtain the capabilities of the slave station, and then ensure that when the PLC assigns a logical address to the slave station, the clock synchronization with the slave station can be realized.

S490, the PLC sends allocation information to the slave station.

Correspondingly, the slave station receives the allocation information from the PLC.

Wherein, the allocation information is used to indicate that sequential logical addresses are allocated to each slave station, and the allocation information includes a plurality of logical address information. Wherein, there is a one-to-one correspondence relationship between each slave station and each logical address, and any two logical addresses are not the same.

Exemplarily, the PLC sequentially assigns sequential logical addresses to the slave stations connected to the online ONUs until every slave station goes online. For example, the PLC assigns logical address 1 to the slave station 1 attached to the ONU x closest to the OLT. Then, the PLC assigns a logical address 2 to the slave station 2 attached to the ONU y closest to the OLT. The PLC assigns a logical address of 3 to the slave station 3 attached to the ONU z that is farthest from the OLT. By analogy, until all the slave stations are assigned sequential logical address information. In this implementation, the logical addresses of multiple slave stations are sequential, that is, in a gradually increasing manner.

Optionally, the sequential logical addresses of the slave stations may also be configured in a gradually decreasing manner.

Optionally, the sequential logical addresses of the slave stations may also be arranged in alphabetical order (for example, English letters), that is, A, B, C....

The several implementation manners given above are only illustrative descriptions, and should not constitute any limitation to the technical solution of the present application.

It should be noted that, in the embodiment of the present application, before step S490, the PLC needs to determine the corresponding relationship between the logical address and the physical address of the slave station, so as to realize that the PLC assigns logical addresses to the slave stations sequentially.

In a possible implementation manner, the corresponding relationship is found through different ONU serial numbers (serial number, SN). Fig. 5 is a schematic diagram of an example of determining the corresponding relationship between a logical address and a physical address of a slave station applicable to the present application. As shown in Figure 5, the upper computer can determine the corresponding relationship between the ONU ID and the secondary station N through the corresponding relationship between the ONU ID and the ONU SN, and the corresponding relationship between the ONU SN and the secondary station N.

Exemplarily, firstly, the electrician installs all the slave stations according to the construction drawings, and successfully connects all the power supply and communication cables. Secondly, the controller debugger needs to record the ONU SN number of each ONU and the information of the corresponding slave station N. Then, the ONU SN of each ONU and its corresponding ONU ID can be queried on the OLT. In this way, the corresponding relationship between the slave station N and the ONU ID can be determined through the ONU SN, and a specific slave station can be found. Similarly, electricians or programmers then mark the correspondence between the logical addresses and physical locations of all slave stations in turn, and finally perform programming and debugging.

In another possible implementation manner, the corresponding relationship is found through different ONU distances (ONU distance). Fig. 6 is a schematic diagram of another example of determining the corresponding relationship between a logical address and a physical address of a slave station applicable to the present application. As shown in FIG. 6 , the host computer can successively determine the corresponding relationship between the ONU ID and the secondary station N through the corresponding relationship between the ONU ID and the ONU distance, and the corresponding relationship between the ONU distance and the secondary station N.

Exemplarily, firstly, the electrician installs all the slave stations according to the construction drawings, and successfully connects all the power supply and communication cables. Wherein, the ONU distance of each ONU and the physical location information of the corresponding slave station N need to be recorded during installation. Then, according to the principle of PON ranging, the distance between the OLT and each ONU can be queried on the OLT. Find the corresponding ONU ID by ONU distance. In this way, the corresponding relationship between the slave station N and the ONU ID can be determined through the ONU distance, and a specific slave station can be found. Similarly, electricians or programmers then mark the correspondence between the logical addresses and physical locations of all slave stations in turn, and finally perform programming and debugging.

In yet another possible implementation manner, the electrician installs all slave stations according to the construction drawings, and successfully connects all power supply and communication cables. The controller debugger directly connects to the slave stations one by one, and configures a sequential logical address for each slave station.

Exemplarily, in the technical solution of the present application, the distance difference between each ONU and the OLT is increased by extending the length of the main optical fiber in the optical splitter (for example, an unequal optical splitter or an equal optical splitter). The following describes how to perform sequential addressing for the slave stations by extending the length of the trunk optical fiber of the optical splitter in the unequal-ratio optical networking structure and the equal-ratio optical networking structure.

As a possible implementation manner, FIG. 7 is a schematic diagram of an example of an unequal-ratio optical networking structure applicable to this application. As shown in Figure 7, the host computer is connected to the master station controller, the master station controller is connected to the OLT, the OLT is connected to multiple ONUs, and the multiple ONUs are respectively connected to the corresponding slave stations. Among them, each slave station is connected hand in hand in turn to form a daisy chain architecture.

In the unequal optical network structure, each ONU is connected to an unequal optical switch with extended optical fiber. Wherein, the unequal optical splitter with extended optical fiber includes trunk optical fiber and branch optical fiber. In the embodiment of the present application, the distance between each ONU and the OLT is artificially increased by extending the length of the trunk optical fiber of the unequal optical splitter, thereby constructing a distance difference. In the embodiment of the present application, each slave station needs to be equipped with an unequal optical splitter to achieve different distance differences.

It should be noted that the specifications of the unequal ratio optical filters corresponding to different ONUs and the length of the extension fiber are the same. Exemplarily, the unequal optical splitter 1 with extended fiber corresponding to ONU x, the unequal optical splitter 2 with extended optical fiber corresponding to ONU y, and the unequal optical splitter with extended optical fiber corresponding to ONU z 3 have the same specification, and the length of the extended trunk fiber is the same. For example, the length of the extended optical fiber is 5 meters, which is not specifically limited in the present application.

Optionally, in the embodiment of the present application, the extension lengths of the trunk optical fibers extended by each unequal optical splitter may not be exactly the same. As long as the relatively obvious distance difference between each ONU and the OLT can be determined through the backbone optical fiber, this application does not specifically limit it.

It should be noted that there are errors in the PON ranging in actual measurement. The longer the distance, the smaller the measurement error. In the embodiment of the present application, the artificially constructed distance difference can be regarded as an ideal measurement result.

Among them, in the unequal ratio optical networking structure, the method of sequential addressing by extending the length of the fiber can include:

First, use an unequal optical splitter and add a core of the same length, for example, 5 to 10 meters, at the end of the main fiber. The present application does not specifically limit the length of the fiber core, which is mainly determined according to the accuracy of PON distance measurement. That is, the longer the PON ranging distance, the smaller the ranging error. However, due to the relatively large volume of the unequal beam splitter, it also depends on the actual situation. In short, extending the trunk fiber through unequal optical splitters can form a hand-in-hand daisy-chain structure (but in fact it is still a P2MP structure).

Then, the OLT judges the ONU closest to the OLT through distance measurement, and controls it to go online first through software (the OLT controls the order of ONUs going online by sending an empty Bwmap to the ONU), and assigns the ONU ID as 1. Assign ONUID 2 to the next closest ONU. By analogy, ensure that all ONU IDs are numbered sequentially according to distance.

Finally, the OLT notifies the master station controller that the downlink nodes go online, and the master station controller can configure numbers for the downlink slave stations in sequence.

In another possible implementation manner, FIG. 8 is a schematic diagram of an example of an equal-ratio optical networking structure applicable to this application. As shown in Figure 8, multiple slaves can be connected simultaneously on one equal-ratio splitter with extended fiber optics.

Wherein, the equal ratio beam splitter includes 1 input port and 8 output ports, as shown in Figures 1 to 8, it can be understood that the 8 output ports of the equal ratio beam splitter with extended optical fiber. The 8 ports are respectively connected to 8 ONUs, and each ONU is connected to the corresponding slave station. Exemplarily, a plurality of ports of an equal optical splitter with extended optical fibers corresponds to a plurality of ONUs one by one. For example, port 1 corresponds to ONU 1, and ONU 1 corresponds to slave station 1. Similarly, port 2 corresponds to ONU 2, and ONU 2 corresponds to slave station 2. Port 3 corresponds to ONU 3, and ONU 3 corresponds to slave station 3. And so on, no more details here.

In the equal ratio optical network, the equal splitter with extended fiber includes trunk fiber and branch fiber. In the embodiment of the present application, the distance between each ONU and the OLT is artificially increased by extending the length of the trunk optical fiber of the equalizer, thereby constructing a distance difference. In the embodiment of the present application, each slave station corresponds to a port of the equalizer.

It should be noted that, in the equal-ratio optical networking structure, the lengths of the trunk extension fibers corresponding to each port are different. Exemplarily, the trunk fiber extension length of port 1 corresponding to ONU 1 is 1, the trunk fiber extension length of port 2 corresponding to ONU 2 is 2, the trunk fiber extension length of port 3 corresponding to ONU 3 is 3, etc. . That is, the lengths of the extension trunk fibers corresponding to each port in the equal optical splitter with extended optical fiber are different, and with the increase of ONU ID and slave station ID, the length of the port optical fiber of each equal optical splitter also gradually increases of. The extension length of the above-mentioned trunk optical fiber is only an exemplary description, and shall not constitute any limitation to the technical solution of the present application.

Among them, in the equal-ratio optical networking structure, the method of sequential addressing by extending the length of the optical fiber may include:

First, add 5-10 meters of fiber cores one by one in each port of the equalizer, or a larger distance difference can be constructed. In this application, the extension length of the optical fiber is not fixed, and this application does not specifically limit the length of the fiber core, which is mainly determined according to the accuracy of PON distance measurement. That is, the longer the PON ranging distance, the smaller the ranging error. However, due to the relatively large volume of the unequal beam splitter, it also depends on the actual situation. That is, the extension length of the main fiber is determined according to the volume of the equalizer and the distance measurement error to form a P2MP star structure.

Then, the OLT judges the ONU closest to the OLT through distance measurement, and controls it to go online first through software (the OLT controls the order of ONUs going online by sending an empty Bwmap to the ONU), and assigns the ONU ID as 1. Assign ONUID 2 to the next closest ONU. By analogy, ensure that all ONU IDs are numbered sequentially according to distance.

Finally, the OLT notifies the master station controller that the downlink nodes go online, and the master station controller can configure numbers for the downlink slave stations in sequence.

To sum up, this application provides a technical solution for sequential addressing of slave stations, using the artificially constructed distance difference of extended optical fibers to allow the OLT to identify the sequence of ONUs connected to the downstream, and cooperate with upper-layer software to realize automatic sequential addressing of slave stations.

In the case of ensuring low latency and low jitter at the slave stations at the end of the daisy chain structure chain, each slave station can be addressed in sequence to ensure a one-to-one correspondence between the logical networking and the physical networking of the slave stations. Moreover, it reduces the construction difficulty of workers, reduces labor costs, and reduces the requirements for construction personnel. In addition, during construction and laying, there is no need to manually record data, which has higher efficiency and improved accuracy. That is to say, the above solution solves the problem that the slave stations cannot be sequentially addressed when the PON technology is applied in the industrial scene, and improves the construction efficiency. Moreover, for the one-hop direct networking structure of PON technology, the problem of large delay and jitter of the slave station at the end of the chain of the daisy chain structure is solved.

It should be noted that the technical solution of this application is also applicable to scenarios in which IDs need to be allocated in other fields, and the technical solution for solving sequential addressing can also be applied to other fields. Wherein, both software and hardware fields are applicable, which is not specifically limited in this application.

The method side embodiment of the slave station sequential addressing of the present application is described in detail above with reference to FIG. 1 to FIG. 8 , and the device side embodiment of the slave station sequential addressing of the present application will be described in detail below in conjunction with FIG. 9 and FIG. 10 . It should be understood that the descriptions of the device embodiments correspond to the descriptions of the method embodiments, therefore, for parts that are not described in detail, reference may be made to the foregoing method embodiments.

Fig. 9 is a schematic block diagram of a slave station sequential addressing device provided by an embodiment of the present application. As shown in FIG. 9 , the apparatus 1000 may include a processing unit 1100 and a transceiver unit 1200 .

Optionally, the apparatus 1000 may correspond to the optical line terminal (optical line terminal, OLT) in the above method embodiment. For example, it may be an OLT, or a component (such as a circuit, a chip, or a chip system, etc.) configured in the OLT.

It should be understood that the apparatus 1000 may correspond to the OLT in the method 300 or 400 according to the embodiment of the present application, and the apparatus 1000 may include a unit for performing the method 300 in FIG. 3 or the OLT execution method in the method 400 in FIG. 4 . Moreover, each unit in the apparatus 1000 and the above-mentioned other operations and/or functions are respectively intended to implement the corresponding flow of the method 300 in FIG. 3 or the method 400 in FIG. 4 .

Exemplarily, the processing unit 1100 is used for the OLT to determine the online sequence of the multiple ONUs;

The OLT notifies the PLC to configure sequential logical addresses for the multiple slave stations according to the online order of the multiple ONUs, and any two slave stations have different logical addresses.

According to the solution provided by the present application, sequential logical addresses are assigned to corresponding slave stations through the ONU online, thereby reducing the delay and jitter of the slave stations, and improving the communication performance of the system.

Optionally, the processing unit 1100 is also used for the OLT to determine the online order of multiple ONUs according to the distances of multiple first distances, where the multiple first distances are the distances between the multiple ONUs and the OLT, and the multiple first distances are respectively the distances between the multiple ONUs and the OLT. A distance is in one-to-one correspondence with multiple ONUs.

Optionally, the processing unit 1100 is further configured to: when the i-th first distance among the multiple first distances is smaller than the i+1-th first distance, the optical line terminal determines that the online sequence of the i-th optical network unit is optimal In the on-line sequence of the i+1th ONU, the i-th first distance corresponds to the i-th ONU, the i+1-th first distance corresponds to the i+1-th ONU, and i is an integer greater than zero .

Optionally, the multiple first distances are preconfigured.

Exemplarily, the multiple first distances are determined according to the extended length of the trunk fiber of the unequal optical splitter; or, the multiple first distances are determined according to the distance between the input port and the multiple output ports of the equal optical splitter The distance is fixed.

Optionally, the processing unit 1100 is also used for the OLT to control multiple ONUs to go online sequentially according to the online sequence of the multiple ONUs.

Optionally, the processing unit 1100 is also used for the OLT to configure a plurality of optical network unit identification ONU IDs for a plurality of ONUs in sequence according to the online order of a plurality of ONUs, and a plurality of ONU IDs are in one-to-one correspondence with a plurality of slave stations, and a plurality of The ONU ID corresponds to multiple ONUs one by one, and any two optical network unit identifiers are different.

Exemplarily, the multiple ONU IDs include a first ONU ID, the multiple slave stations include a first slave station, and the first ONU ID corresponds to the first slave station. Wherein, the corresponding relationship between the first ONU ID and the first slave station is determined according to one or more of the serial number ONUSN of the first optical network unit, the distance between the first ONU and the OLT, and the first ONU is one of multiple ONUs One, the first ONU corresponds to the first slave station.

Exemplarily, the transceiver unit 1200 is used for the OLT to send indication information to the PLC, the indication information includes multiple ONUIDs, and the indication information is used to instruct the PLC to configure sequential logical addresses for multiple slave stations according to the multiple ONU IDs.

It should also be understood that when the apparatus 1000 is an OLT, the transceiver unit 1200 in the apparatus 1000 may be implemented by a transceiver, and the processing unit 1100 in the apparatus 1000 may be implemented by at least one processor.

It should also be understood that when the device 1000 is a chip or chip system configured in the OLT, the transceiver unit 1200 in the device 1000 can be realized through an input/output interface, a circuit, etc., and the processing unit 1100 in the device 1000 can be implemented through the chip Or the implementation of integrated processors, microprocessors or integrated circuits on chip systems.

Fig. 10 is another schematic block diagram of a slave station sequential addressing device 2000 provided by an embodiment of the present application. As shown in FIG. 10 , the device 2000 includes a processor 2010 and a transceiver 2020 . Wherein, the processor 2010 and the transceiver 2020 communicate with each other through an internal connection path, and the processor 2010 is used to execute instructions to control the transceiver 2020 to send signals and/or receive signals.

Optionally, the device 2000 further includes a memory 2030 . Wherein, the memory 2030 communicates with the processor 2010 and the transceiver 2020 through an internal connection path, the memory 2030 is used to store instructions, and the processor 2010 is used to execute the instructions stored in the memory 2030 to control the transceiver 2020 to send signals and /or to receive a signal.

Exemplary, the processor 2010 is used for the OLT to determine the online order of the multiple ONUs; the OLT indicates the logical address of the PLC for the multiple slave stations according to the online order of the multiple ONUs, and any two slave stations The logical addresses are different.

According to the solution provided by the present application, sequential logical addresses are assigned to corresponding slave stations through the ONU online, thereby reducing the delay and jitter of the slave stations, and improving the communication performance of the system.

Optionally, the processor 2010 is also used for the OLT to determine the online order of the multiple ONUs according to the distances of the multiple first distances, the multiple first distances are the distances between the multiple ONUs and the OLT, and the multiple first distances are the distances between the multiple ONUs and the OLT. A distance is in one-to-one correspondence with multiple ONUs.

Optionally, the processor 2010 is further configured to: when the i-th first distance among the multiple first distances is smaller than the i+1-th first distance, the optical line terminal determines that the online sequence of the i-th optical network unit is optimal In the on-line sequence of the i+1th ONU, the i-th first distance corresponds to the i-th ONU, the i+1-th first distance corresponds to the i+1-th ONU, and i is an integer greater than zero .

Optionally, the multiple first distances are preconfigured.

Exemplarily, the multiple first distances are determined according to the extended length of the trunk fiber of the unequal optical splitter; or, the multiple first distances are determined according to the distance between the input port and the multiple output ports of the equal optical splitter The distance is fixed.

Optionally, the processor 2010 is also used for the OLT to control multiple ONUs to go online sequentially according to the online sequence of the multiple ONUs.

Optionally, the processor 2010 is also used for the OLT to configure a plurality of optical network unit identification ONU IDs for a plurality of ONUs in sequence according to the online order of a plurality of ONUs. The ONU ID corresponds to multiple ONUs one by one, and any two optical network unit identifiers are different.

Exemplarily, the multiple ONU IDs include a first ONU ID, the multiple slave stations include a first slave station, and the first ONU ID corresponds to the first slave station. Wherein, the corresponding relationship between the first ONU ID and the first slave station is determined according to one or more of the serial number ONUSN of the first optical network unit, the distance between the first ONU and the OLT, and the first ONU is one of multiple ONUs One, the first ONU corresponds to the first slave station.

Exemplarily, the processor 2010 is used for the OLT to send indication information to the PLC, the indication information includes multiple ONU IDs, and the indication information is used to instruct the PLC to sequentially configure sequential logical addresses for multiple slave stations according to the multiple ONU IDs.

It should be understood that the apparatus 2000 may correspond to the OLT in the above method embodiments, and may be used to execute various steps and/or processes performed by the OLT in the above method embodiments.

Optionally, the memory 2030 may include read-only memory and random-access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. The memory 2030 may be an independent device, or may be integrated in the processor 2010 . The processor 2010 may be used to execute the instructions stored in the memory 2030, and when the processor 2010 executes the instructions stored in the memory, the processor 2010 is used to execute the various steps and/or process.

Optionally, the apparatus 2000 is the optical line terminal OLT in the foregoing embodiments.

Wherein, the transceiver 2020 may include a transmitter and a receiver. The transceiver 2020 may further include antennas, and the number of antennas may be one or more. The processor 2010, the memory 2030 and the transceiver 2020 may be devices integrated on different chips. For example, the processor 2010 and the memory 2030 may be integrated in a baseband chip, and the transceiver 2020 may be integrated in a radio frequency chip. The processor 2010, the memory 2030 and the transceiver 2020 may also be devices integrated on the same chip. This application is not limited to this.

Optionally, the apparatus 2000 is a component configured in an optical line terminal OLT, such as a circuit, a chip, a chip system, and the like.

Wherein, the transceiver 2020 may also be a communication interface, such as an input/output interface, a circuit, and the like. The transceiver 2020, the processor 2010 and the memory 2020 may be integrated into the same chip, such as a baseband chip.

Optionally, the memory and the processor in the foregoing apparatus embodiments may be physically independent units, or the memory and the processor may also be integrated together, which is not limited in the present application.

In addition, the present application also provides a chip, the chip includes a processor, the memory for storing the computer program is set independently of the chip, the processor is used for executing the computer program stored in the memory, so that the controller installed with the chip Execute the operations and/or processes performed by the control device in any one method embodiment.

Further, the chip may further include a communication interface. The communication interface may be an input/output interface, or an interface circuit or the like.

Further, the chip may further include the memory.

In addition, the present application also provides a communication device (for example, a chip), including a processor and a communication interface, the communication interface is used to receive signals and transmit the signals to the processor, and the processor processes The signal enables the operation and/or processing performed by the controller in any method embodiment to be performed.

In addition, the present application also provides a communication device, including at least one processor, the at least one processor is coupled to at least one memory, and the at least one processor is configured to execute computer programs or instructions stored in the at least one memory, The operation and/or processing performed by the controller in any method embodiment is executed.

In addition, the present application also provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are run on the computer, the computer is made to execute the above-mentioned controller in each method embodiment of the present application. operations and/or processes.

In addition, the present application also provides a computer program product. The computer program product includes computer program codes or instructions. When the computer program codes or instructions are run on the computer, the operations performed by the controller in each method embodiment of the present application and/or or process is executed.

It should be understood that the specific examples in the embodiments of the present application are only to help those skilled in the art better understand the technical solutions of the present application. example range.

In each embodiment of the present application, if there is no special explanation and logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referred to each other, and the technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

The processor in this embodiment of the present application may be an integrated circuit chip capable of processing signals. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The processor can be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (application-specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable Logic devices, discrete gate or transistor logic devices, discrete hardware components. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, and the like. The steps of the methods disclosed in the embodiments of the present application may be directly implemented by a hardware coded processor, or executed by a combination of hardware and software modules in the coded processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

The memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasablePROM, EPROM), electrically erasable In addition to programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM ), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and Direct memory bus random access memory (direct rambusRAM, DRRAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only schematic illustrations. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the technical solutions of the embodiments of the present application.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (23)

1. A slave station sequential addressing method, characterized in that it is applied to a first control system, said first control system comprising a passive optical fiber network PON, a master station controller and a plurality of slave stations, said PON comprising optical A line terminal and a plurality of optical network units, the plurality of optical network units correspond to the plurality of slave stations one by one, and the method includes: The optical line terminal determines the online sequence of the plurality of optical network units; The optical line terminal notifies the master station controller to configure sequential logical addresses for the plurality of slave stations according to the online order of the plurality of optical network units, and any two slave stations have different logical addresses. 2. The method according to claim 1, wherein the optical line terminal determining the online sequence of the plurality of optical network units comprises: The optical line terminal determines the online order of the multiple optical network units according to the distances of multiple first distances, and the multiple first distances are distances between the multiple optical network units and the optical line terminal, respectively. distance, the multiple first distances correspond to the multiple optical network units one by one. 3. The method according to claim 2, wherein the optical line terminal determines the online order of the multiple optical network units according to the distances of the multiple first distances, comprising: When the i-th first distance among the plurality of first distances is smaller than the i+1-th first distance, the optical line terminal determines that the online order of the i-th ONU is higher than that of the i-th ONU The on-line sequence of the i+1 optical network unit, the i-th first distance corresponds to the i-th optical network unit, the i+1-th first distance corresponds to the i+1-th optical network unit, i is an integer greater than zero. 4. The method according to claim 2 or 3, wherein the plurality of first distances are pre-configured. 5. The method according to any one of claims 2 to 4, wherein the multiple first distances are determined according to the extension length of the trunk optical fiber of the unequal optical splitter; or, The plurality of first distances are determined according to the distances between the input port and the plurality of output ports of the equalizing beam splitter. 6. The method according to any one of claims 1 to 5, further comprising: The optical line terminal controls the multiple optical network units to go online sequentially according to the online order of the multiple optical network units. 7. The method according to any one of claims 1 to 6, wherein the method further comprises: The optical line terminal sequentially configures multiple optical network unit identifiers for the multiple optical network units according to the online order of the multiple optical network units, and the multiple optical network unit identifiers are one by one with the multiple slave stations Correspondingly, the multiple optical network unit identifiers are in one-to-one correspondence with the multiple optical network unit identifiers, and any two optical network unit identifiers are different. 8. The method according to claim 7, wherein the multiple optical network unit identifiers include a first optical network unit identifier, the plurality of slave stations include a first slave station, and the first optical network unit The identifier corresponds to the first slave station, wherein the correspondence between the first optical network unit identifier and the first slave station is based on the serial number of the first optical network unit, the first optical network unit and the first slave station The first optical network unit is one of the plurality of optical network units, and the first optical network unit corresponds to the first slave station. 9. The method according to claim 7 or 8, wherein the optical line terminal notifies the master station controller to configure the order of the plurality of slave stations according to the online order of the plurality of optical network units Logical address, including: The optical line terminal sends a notification message to the main station controller, the notification message includes the identifications of the multiple optical network units, and the notification message is used to instruct the main station controller to The unit identifiers sequentially configure sequential logical addresses for the plurality of slave stations. 10. A slave station sequential addressing device, characterized in that it is applied to a first control system, the first control system includes a passive optical network PON, a master station controller and a plurality of slave stations, and the PON includes an optical A line terminal and a plurality of optical network units, the plurality of optical network units correspond to the plurality of slave stations one by one, and the device includes a processing unit for: The optical line terminal determines the online sequence of the plurality of optical network units; The optical line terminal notifies the master station controller to configure sequential logical addresses for the plurality of slave stations according to the online order of the plurality of optical network units, and any two slave stations have different logical addresses. 11. The apparatus of claim 10, wherein: The processing unit is further used for the optical line terminal to determine the online order of the multiple optical network units according to the distance between the multiple first distances, and the multiple first distances are respectively the distance between the multiple optical network units and the The distance between the optical line terminals, the multiple first distances correspond one-to-one to the multiple optical network units. 12. The apparatus of claim 11, wherein: The processing unit is further configured to, when the i-th first distance among the plurality of first distances is smaller than the i+1-th first distance, the optical line terminal determines that the i-th optical network unit The on-line order of the i+1th optical network unit is better than that of the i+1th optical network unit, the i-th first distance corresponds to the i-th optical network unit, and the i+1-th first distance corresponds to the i-th optical network unit i+1 corresponds to the optical network unit, and i is an integer greater than zero. 13. The apparatus according to claim 11 or 12, wherein the plurality of first distances are pre-configured. 14. The device according to any one of claims 11 to 13, wherein the plurality of first distances are determined according to the extended length of the trunk optical fiber of the unequal optical splitter; or, The plurality of first distances are determined according to the distances between the input port and the plurality of output ports of the equalizing beam splitter. 15. Apparatus according to any one of claims 10 to 14, characterized in that The processing unit is further used for the optical line terminal to control the multiple optical network units to go online sequentially according to the online order of the multiple optical network units. 16. Apparatus according to any one of claims 10 to 15, wherein The processing unit is further used for the optical line terminal to sequentially configure multiple optical network unit identifiers for the multiple optical network units according to the online order of the multiple optical network units, and the multiple optical network unit identifiers are related to The multiple slave stations are in one-to-one correspondence, the multiple ONU identifiers are in one-to-one correspondence with the multiple ONUs, and any two ONU identifiers are different. 17. The device according to claim 16, wherein the multiple optical network unit identifiers include a first optical network unit identifier, the multiple slave stations include a first slave station, and the first optical network unit The identifier corresponds to the first slave station, wherein the correspondence between the first optical network unit identifier and the first slave station is based on the serial number of the first optical network unit, the first optical network unit and the first slave station The first optical network unit is one of the plurality of optical network units, and the first optical network unit corresponds to the first slave station. 18. The device according to claim 16 or 17, further comprising: a transceiver unit, configured for the optical line terminal to send a notification message to the master station controller, where the notification message includes the identifiers of the multiple optical network units, and the notification message is used to instruct the master station controller according to The plurality of optical network unit identifiers are sequentially configured logical addresses of the plurality of slave stations. 19. An optical communication system, comprising: the optical line terminal according to any one of claims 1 to 9. 20. An optical communication device, characterized by comprising: a processor and a communication interface, the processor is configured to execute instructions, so that the optical communication device executes the method according to any one of claims 1 to 9. 21. A chip, characterized in that it includes: a communication interface, a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the installed The optical line terminal of the chip executes the method according to any one of claims 1-9. 22. A computer storage medium, characterized by comprising: a computer program is stored on the computer storage medium, and when the computer program is run, the computer is made to execute the computer according to any one of claims 1 to 9. Methods. 23. A computer program, characterized in that, when the computer program is executed on a computer, it causes the computer to execute the method according to any one of claims 1 to 9.

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