KR20210047748A - Industiral communication system in 5g network - Google Patents

Abstract

The present invention relates to a converter that connects an industrial site and a 5G network using a time-sensitive networking (TSN) interface comprising: a format conversion device that determines a format type of data received from any one among an industrial equipment, a control device of the industrial equipment, or an arbitrary node of the 5G network, and converts a format of the received data according to a communication interface of a transmission target node; and a time synchronization device that synchronizes a time of the arbitrary node and the transmission target node, wherein the communication interface of the transmission target node is either the TSN interface or the 5G interface. Therefore, the present invention is capable of supporting new industrial services quickly.

Description

5G-based industrial communication system {INDUSTIRAL COMMUNICATION SYSTEM IN 5G NETWORK}

The present invention relates to a 5G-based industrial communication technology.

The 5G service market is currently an early market centering on enhanced mobile-broadband (eMBB) services, but as 5G networks evolve and become commercialized in the future, expectations for providing various 5G services are expected to exist. Typically, 5G in industrial communication is considered, with the characteristics of ultra-reliable and low latency communications (URLLC) and massive machine-type communications (mMTC).

Meanwhile, as the core of the 4th industrial revolution, the smart factory aims to innovatively improve the flexibility, scalability, resource efficiency, cost efficiency, worker support and stability, production products and logistics, and quality of distribution as the core of the 4th industrial revolution. .

Smart factories take a conservative position in the application of mobile communication due to problems such as product discontinuation and data billing, although the market is the widest among the various application fields of 5G, and many factories are still using serial communication. Therefore, it is necessary to move away from the production system based on the existing wired and short-range wireless networks and switch to a system based on a high-performance, high-quality wireless network provided by 5G communication.

Meanwhile, as it is connected with various objects and services inside/outside the factory, it requires a variety of domain solutions and interoperability technologies for networking and integration between companies.Therefore, a 5G network is established in consideration of various manufacturing devices and communication methods used in smart factories. It needs to be introduced.

The problem to be solved by the present invention is to provide a system for introducing a 5G network into an existing industrial communication system.

In addition, the problem to be solved by the present invention is to provide a converter applicable to an industrial communication system having various communication protocols.

A converter that connects an industrial site using a time-sensitive networking (TSN) interface and a 5G network according to an embodiment, among industrial equipment, a control device of the industrial equipment, or an arbitrary node of the 5G network. A format conversion device that determines the format type of data received from any one and converts the format of the received data according to the communication interface of the transmission target node, and time to synchronize the time between the random node and the transmission target node And a synchronization device, and the communication interface of the transmission target node is either the TSN interface or the 5G interface.

The time synchronization device may be directly connected or indirectly connected to the grand master clock of the TSN interface or the grand master clock of the 5G network.

The converter may further include a frequency conversion device for matching a dedicated frequency allocated to the TSN interface or an arbitrary common frequency with a frequency of the 5G network.

As a converter for connecting a 5G network with an industrial site using a unique Ethernet interface according to an embodiment, the format type of data received from any one of the industrial equipment, the control device of the industrial equipment, or any node of the 5G network A format conversion device for determining and converting the format of the received data according to a communication interface of a transmission target node, and a time synchronization device for synchronizing a time between the arbitrary node and the transmission target node, the transmission target node The communication interface of is either the native Ethernet interface or the 5G interface.

The converter detects an error in the received data, a Profinet network card physically connected to the industrial equipment or the control device, a 5G network card connected wirelessly or wiredly to an arbitrary node of the 5G network, and the A data link layer that corrects the detected error, an integration layer that processes the frame of the received data according to the communication interface of the transmission target node, and scheduling of the unique Ethernet interface and the 5G network based on the received data. It may include a responsible control layer.

As a converter that connects a 5G network with an industrial site using a fieldbus according to an embodiment, it determines the format type of data received from any one of the industrial equipment, the control device of the industrial equipment, or any node of the 5G network. And a format conversion device for converting the format of the received data according to a communication interface of a transmission target node, and a time synchronization device for synchronizing a time between the arbitrary node and the transmission target node, and The communication interface is one of the fieldbus or 5G interfaces.

The converter generates and manages a bridge table in which logical addresses corresponding to nodes constituting the industrial site and the 5G network and actual physical addresses of the nodes are matched, and the transmission target node included in the received data The logical address of can be converted into a physical address according to the bridge table.

The time synchronization device may periodically transmit an arbitrary message to the transmission target node.

According to the present invention, it is possible to rapidly support a new industrial service not only for industrial equipment currently used but also for industrial equipment to which a standard is applied later.

In addition, it is possible to contribute to 5G standardization activities related to smart factories by verifying in advance whether the smart factory where the 5G network is introduced can accommodate the services of various protocols that exist.

1 is an exemplary view showing an existing industrial communication system.
2 is a block diagram of an industrial communication system according to an embodiment.
3 is a block diagram showing a communication interface of an industrial communication system of a TSN network type according to an embodiment.
4 is an explanatory diagram illustrating a time synchronization method of an industrial communication system according to an embodiment.
5 is a block diagram showing a converter and its surroundings according to an embodiment.
6 is a block diagram showing a hierarchy of a converter according to an embodiment.
7 is an exemplary diagram of a data structure used in a fieldbus network.
8 is a flowchart of a method of operating a converter according to an embodiment.
9 is a block diagram of industrial equipment according to an embodiment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

In the present specification, a terminal is a user device, and a device, a user equipment (UE), a mobile equipment (ME), a mobile station (MS), a mobile terminal (MT), a subscriber station, SS), a portable subscriber station (PSS), a user equipment (UE), an access terminal (AT), etc., and may be referred to as a mobile terminal, a subscriber station, a mobile subscriber station, It may include all or part of functions such as user equipment.

The terminal of the present specification is a gateway (gateway), a base station (BS), an access point (AP), a radio access station (Radio Access Station, RAS), a node B (Node B), an advanced node B (evolved NodeB, eNodeB), a base transceiver station (BTS), a mobile multihop relay (MMR)-BS, a 5G NB (gNB), and the like, and can be connected to a remote server.

In this specification, a base station refers to a 5G mobile communication NR (New Radio) base station established by 3GPP, and a 5G radio access network NG-RAN (Next Generation-Radio Access Network) is configured to be connected to a plurality of gNodeBs. eNodeB may also be included.

Embodiments of the present invention may be supported by standard documents related to a 3rd Generation Partnership Project (3GPP) 5th Generation (5G) system such as a Study on Architecture for Next Generation System (FS_NextGen). That is, among the embodiments of the present invention, steps or parts not described to clearly reveal the technical idea of the present invention may be supported by the above document. In addition, all terms disclosed in this document can be described by the standard document.

On the other hand, specific use cases where 5G communication is applied to smart factories are as follows.

Through the 5G network, the controller can control one or more actuators, report the results of the actuators, and direct the next action.

As another example, when internal control of a large-scale production facility or a number of individual facilities share a single process, communication is performed between multiple PLCs (Programmable Logic Controller) and controllers through a 5G network, and in real time between synchronized controllers. By passing the data through, it is possible to divide and perform continuous tasks.

As another use case, it is possible to perform control and motion control of a production robot using a 5G network for transport of intermediate or final products within a factory.

As another use case, for the purpose of monitoring the status of the manufacturing process, the factory can be monitored by collecting inventory status data such as manufacturing environment, process status, and raw materials through multiple sensors connected to the 5G network.

In addition, a 5G network may be used for data transmission and sharing of various sensors, devices, robots, terminals, etc. installed in a manufacturing plant.

Hereinafter, an industrial communication system 1000 for applying 5G communication to a smart factory will be described.

1 is an exemplary view showing an existing industrial communication system.

Referring to FIG. 1, the industrial equipment 100 installed in the factory and the control device 200 in the factory may be connected through various industrial communication interfaces.

Although there are various types of industrial communication networks, this specification describes time-sensitive networking, which is an extended version of industrial Ethernet, Profinet, an industrial Ethernet protocol led by industrial equipment manufacturers, and industrial devices that control field-level devices. Three cases of the network system Fieldbus will be described.

Time-Sensitive Networking (hereinafter referred to as'TSN') is an extended function of the Ethernet standard defined by IEEE, and is used in industries that require real-time communication such as automobiles, industrial, and high-performance audio. .

Profinet is an industrial communication protocol that uses the Ethernet standard, and is an industrial standard for processing automation, factory automation and motion control. It is divided into NRT (non-real time), RT (real time) and IRT (isochronous real time) grades.

Fieldbus is a collective term for a set of industrial computer network protocols used for real-time distributed control of measurement/control devices within a factory.

In the existing industrial sites, communication methods such as TSN, Profinet, and fieldbus are mixed and used, so the present invention is applicable to all of the above methods and proposes an industrial communication system 1000 capable of constructing a 5G network. .

On the other hand, the technology for introducing a 5G network using the converter 300 to the existing industrial communication system proposed by the present invention is a non-public network related to a smart factory in a future related standard through a technology verification (Proof Of Concept, PoC). Network, NPN) standards.

2 is a block diagram of an industrial communication system according to an embodiment.

Referring to FIG. 2, the industrial communication system 1000 includes industrial equipment 100, a control device 200, a converter 300, a terminal 410, a base station 420, and a 5G core network 430.

The industrial equipment 100 refers to production facilities such as actuators and controllers or various sensors installed in an industrial site.

The control device 200 refers to a central device that remotely controls the industrial equipment 100 in the industrial site or senses the operating state of facilities installed in the industrial site through a sensor.

The converter 300 is a device that converts equipment using the existing industrial communication system in the present invention to be connected to the 5G network 400, and is the subject of the operation described in this specification.

The converter 300 may create a wireless section in an existing industrial network by accessing the 5G network 400. In addition, it is possible to automatically detect the data format used for communication required according to the specific application and convert it to fit the required format.

The converter 300 has a time synchronization function to minimize the occurrence of delay or jitter when connecting the industrial equipment 100, the control device 200 and the 5G network 400. In addition, it has a frequency conversion function for matching industrial communication, which is expected to be assigned a dedicated frequency, with the 5G network 400. The structure and role of the converter 300 that varies according to each communication method will be described in detail with reference to FIGS. 5 to 7.

Meanwhile, the industrial communication system 1000 proposed by the present invention in FIG. 2 includes two converters 300. One is connected to the industrial equipment 100 in the industrial site, and the other is connected to the control device 200 in the control center in the factory. However, it is natural that only one converter 300 may be included when the industrial site and the control center are physically close to each other or are located at the same location.

The physical structure of the converter 300 varies according to the type of the existing industrial communication system to be replaced by the 5G network 400, as well as communication between the converter 300 and the industrial equipment 100, the converter 300 and the control device ( The communication method between 200) will also be different. Hereinafter, a communication interface according to each communication system will be described with reference to FIG. 3. Meanwhile, the physical structure of the converter will be described in detail with reference to FIG. 6.

The terminal 410 is connected to the converter 300 in the industrial site, receives data of the industrial equipment 100 and transmits it to the base station 420, or the control device 200 wirelessly received from the base station 420 Data or control signals may be transmitted to the industrial equipment 100 through the converter 300.

The base station 420 wirelessly communicates with the terminal 410 and is connected to the 5G core network 430 to transmit the data of the industrial site and the data of the control center. Specifically, in this specification, the base station 420 refers to a 5G NR base station, exchanges user plane and control plane data with the terminal 410 through a radio protocol, and is connected to the 5G core network 430 through an NG interface.

The 5G core network 430 is connected to the base station 420 through an NG interface, and is connected to the converter 300 in the control center in the factory.

3 is a block diagram showing a communication interface of an industrial communication system using a TSN network according to an embodiment.

Referring to FIG. 3, a communication interface of entities in a 5G network 400 is a general IP-based interface such as GPRS Tunneling Protocol (GTP) capable of carrying an IP frame. Since this corresponds to a technology already known through related standard documents, the description will be omitted, and the communication interface between the converter 300 and the industrial site, and the converter 300 and the control center will be mainly described.

Looking at the industrial site first, the converter 300 connected to the industrial equipment 100 may communicate through an interface used in an existing industrial communication system. For example, existing industrial Ethernet such as Ethernet and Profinet can be accommodated as Ethernet over 5G.

The converter 300 and the terminal 410 communicate through a new interface, the N60 interface, to receive data from the industrial equipment 100 or transmit a control signal of the control device 200 to the industrial equipment 100. Meanwhile, the N60 interface is only an example, and the communication interface may vary according to the type of terminal, and for example, Ethernet can be accommodated.

Looking at the control center side, the converter 300 on the control plane serves to convert and transmit a control (Signaling) signal. In addition, content related to quality of service (QoS) can be accommodated, for example, Guaranteed Bit Rate (GBR) operating for TSN network, Delay Critical GBR, 5G QoS Identifier (5QI), Allocation and Retention It may include parameters such as priority (ARP).

The converter 300 on the user plane serves to convert and transmit data information.

Meanwhile, as shown in FIG. 3, the roles of the converter 300 in the control plane and the converter 300 in the user plane may be divided and operated, and only one converter 300 in the user plane may be operated.

The converter 300 of the control plane and the converter 300 of the user plane connected to the control device 200 may also use an existing industrial communication network as it is. That is, the data format of the control device 200 according to the TSN protocol may be received.

4 is an explanatory diagram illustrating a time synchronization method of an industrial communication system according to an embodiment.

Referring to FIG. 4, IEEE 1588 Precision Time Protocol (PTP), which is a protocol defining synchronization between Ethernet network devices, may be used. In IEEE 1588, the grand master clock refers to the highest clock used as a reference for time synchronization among devices on the network. In addition, the time provided from the port in the master state becomes the standard of other ports, and the time provided from the port in the slave state is synchronized with the state of the master port.

Specifically, in the case of the TSN network, entities other than the terminal 410 in the 5G network 400, that is, the base station 420 and the 5G core network 430 are directly connected or indirectly connected to the TSN grand master clock 500 to Is synchronized.

In the case of direct connection, the 5G grand master clock 440 or the TSN grand master clock 500 synchronizes time information of each entity including the terminal 410, thereby reducing delay time and reducing jitter.

In the case of indirect connection, a time aware relay 600 is used, and entities on the TSN network may be indirectly connected to the 5G grand master clock 440 or the TSN grand master clock 500 to be time-synchronized. The method in which the base station 420 and the 5G core network 430 are connected to the TSN grand master clock 500 is described as an example and is not limited to any one.

Meanwhile, time synchronization of a radio section between the terminal 410 and the base station 420 may be synchronized using a frame structure below the symbol level of the physical layer when the terminal initially accesses.

In the case of the fieldbus, time synchronization and scheduling may be performed by periodically transmitting a message to a specific destination or by transmitting a message in a token passing method that adjusts the priority.

Hereinafter, the structure and role of the converter 300 will be described.

5 is a block diagram showing a converter and its surroundings according to an embodiment.

Referring to FIG. 5, the converter 300 serves to convert protocols for data transmission between different networks, and includes a format conversion device 370, a time synchronization device 380, and a frequency conversion device 390. .

The converter 300 collects data collected from the industrial equipment 100, for example, the result of an actuator, sensing data of the manufacturing environment installed in the factory, and transmits it to the control device 200 of the control center, or the control device 200 ) From the actuator control signal, the motion control signal of the robot in the factory, and the like may be received and transmitted to the industrial equipment 100.

The format conversion device 370 automatically detects the format of the collected data and converts the data to be transmitted according to a communication method. A data transmission method and a protocol conversion process using Ethernet will be described in detail with reference to FIG. 6.

When data is exchanged between the 5G network 400 connected to the industrial equipment 100 or the control device 200, the time synchronization device 380 synchronizes the time of each entity receiving the data to reduce the delay time, Jitter can be minimized. As an example, as described with reference to FIG. 4, it may be synchronized with the IEEE 1588 protocol.

The frequency conversion device 390 matches the dedicated frequency of the industrial communication network and the frequency used in the 5G network 400 in the case of industrial communication using a dedicated frequency assigned. For example, when the terminal and the converter 300 are connected by wireless communication, a dedicated frequency of a communication network used, or a common frequency of Wi-Fi when using Wi-Fi may be matched.

Meanwhile, when the terminal and the converter 300 are integrated, the frequency conversion device 390 may be omitted from the configuration of the converter 300.

6 is a block diagram showing a hierarchy of a converter according to an embodiment, and FIG. 7 is an exemplary diagram of a data structure used in a fieldbus network.

Referring to FIG. 6, the converter 300 includes network cards 310 and 320, data link layers 330 and 340, an integration layer 350, and a control layer 360. Hereinafter, a hierarchical structure of three types of converters 300a, 300b, and 300c for connecting the 5G network 400 and different communication methods used in the smart factory will be described.

6A shows the structure of a converter 300a used to introduce a 5G network 400 in a factory using a TSN network, which is an extended version of Industrial Ethernet.

The TSN network card 310a is physically connected to the industrial equipment 100 or the control device 200 using the TSN network, and the 5G network card 320 is a terminal 410 or a 5G core network 430 and wireless or It can be connected by wire. As the TSN network card 310a and the 5G network card 320 are connected, data may be substantially exchanged through hardware called a converter 300a.

Meanwhile, the network cards 310 and 320 may be referred to as Ethernet cards or network adapters, and the 5G network card 320 may be replaced with a 5G LAN network card when 3GPP supports 5G LAN as standardization progresses.

The TSN data link layer 330a and the 5G data link layer 340 are industrial equipment 100 and terminal 410 directly connected by a converter 300a, which is a physical transmission medium, or a control device 200 and a 5G core network. 430) is detected and corrected, and the difference in speed between the transmitting side and the receiving side is compensated. This is already known as the Error Control and Flow Control functions of the Open System Interconnection (OSI) 7-layer model, and a detailed description will be omitted.

Meanwhile, as standardization proceeds, the 5G data link layer 340 may be replaced with a 5G LAN data link layer when 3GPP supports 5G LAN.

The integration layer 350 serves to divide or reassemble a frame of received data. For example, Ethernet frames or Profinet frames can be divided and reassembled.

The control layer 360 manages dynamic messages. When a message received from a node such as the industrial equipment 100 connected to the converter 300a is added or changed, the control layer 360 is responsible for scheduling between the existing TSN network scheme and the 5G network 400. In this case, the node may refer to the industrial equipment 100 or the control device 200 of the industrial equipment 100.

In addition, the control layer 360 maps the logical address of the destination to which data is transmitted to the address of the converter 300a, and configures and manages a bridge table. The logical address and bridge table will be described in detail with reference to (c) of FIG. 6.

Meanwhile, when real-time transmission is required according to the characteristics of transmitted data, the control layer 360 may be responsible for scheduling to ensure real-time transmission in Ethernet. Through scheduling, data can be delivered in real time to homogeneous or heterogeneous remote networks, and remote control and monitoring are also possible.

6(b) shows the structure of a converter 300b specialized for a factory that communicates in a Profinet manner.

The PROFINET network card 310b is physically connected to the industrial equipment 100 or the control device 200 using the PROFINET communication method, and the 5G network card 320 is the terminal 410 or the 5G core network 430 And can be connected wirelessly or wired.

The PROFINET data link layer 330b and the 5G data link layer 340 transmit data between physically connected hosts.

Hereinafter, since the roles of the integration layer 350 and the control layer 360 are the same as those of the converter 300 of the TSN network described in (a) of FIG. 6, a description thereof will be omitted.

6(c) shows the structure of a converter 300c that is used in a factory communicating with a fieldbus protocol and connects to the 5G network 400. Hereinafter, as a specific example, a conversion process between the CAN or Profibus interface and Ethernet in the fieldbus series will be described.

The fieldbus network card 310c and the 5G network card 320 may be directly connected to nodes of each network, like converters 300a and 300b of other communication methods.

In the fieldbus, each node has a logical address and a physical address. The logical address refers to a unique address of each node in the entire network connected to the converter 300c by Ethernet, and the physical address refers to an address of an existing fieldbus protocol, that is, an Ethernet address.

When using the CAN interface, the transmitted CAN frame does not contain the address of the node, so a logical address corresponding to the message ID can be assigned to each node.

The fieldbus data link layer 330c and the 5G data link layer 340 perform error control and flow control functions as described in FIG. 6A.

In the case of using a fieldbus, like the converters 300a and 300b applied to other communication methods, the integration layer 350 serves to divide or reassemble a frame of received data.

Meanwhile, a general data format used in a fieldbus network has the frame structure of FIG. 7A. As a representative data format of the fieldbus series, the structure of the CAN data frame is shown in Fig. 7(b), and the structure of the Profibus data frame is shown in Fig. 7(c).

The fieldbus integration layer 350 serves to maintain the logical addresses of nodes. In addition, when a new control application is started, it serves to deliver the message requirements required by the application to the converter 300c. And it serves to inform the converter 300 when a new message is added or deleted, or when a request for a message is changed. In addition, it provides an API that enables the control application program to transmit and receive data in an integrated environment.

The control layer 360 is in charge of scheduling over the fieldbus and Ethernet based on information on addition, change, and deletion of messages received from the node. In addition, the logical address of the destination node is mapped to the physical address of the corresponding converter 300c, and a bridge table is formed and managed.

On the other hand, in the fieldbus, when data to be transmitted is generated, each node configures an integrated layer frame in which the logical address of the corresponding node is used as the source address and the logical address of the destination node is the destination address. To determine the logical address of each node, the address translation table of Table 1 may be used.

Node address Logical address 0x123 0x0A000123 0x124 0x0A000124 0x125 0x0A000125 0x126 0x0A000126

Thereafter, the sending node sends a message by putting a message in the data field of the fieldbus frame. The converter 300c receives this and converts the received Ethernet frame to fit the fieldbus frame of the destination node in order to transmit the received Ethernet frame to the other converter 300c. In this case, the logical address and physical address mapping table of Table 2 may be used. On the other hand, Table 2 may be referred to as a bridge table.

Logical address Physical address 0x0A000123 0x000001010123 0x0A000124 0x000001010456 0x0A000125 0x000001010789 0x0A000126 0x000001010ABC

8 is a flowchart of a method of operating a converter according to an embodiment.

Referring to FIG. 8, the communication method of the industrial equipment 100 as a source node is CAN, and the communication method of the control device 200, which is a destination node, is Profibus, and the industrial equipment 100 transmits a message to the control device 200. Suppose the situation is.

The industrial equipment 100, which is the starting node, requests data transmission to the converter 300 (S101). Specifically, when the application of the source node requests data transfer, the integration layer of the node constructs a frame and delivers it to the data link layer, and the data link layer generates a fieldbus frame and transmits it to the converter 300 at the source node. .

The source node side converter 300 searches its own bridge table to find the physical address of the destination node side converter 300 and converts it into an Ethernet frame (S102).

The source node-side converter 300 identifies the physical address of the control device 200, which is a destination node, and notifies the Ethernet master of the 5G network 400 that there is data to be transmitted through a polling message (S103).

At this time, the Ethernet master may exist in the Application Function (AF) in the 5G network 400 for scheduling, as shown in FIG. 8, and as another example, any one of the converters 300 on the destination node serves as the Ethernet master. Can be in charge. At this time, the converter acting as the Ethernet master can perform the operation of the converter and at the same time take charge of overall scheduling.

The Ethernet master performs scheduling based on the received polling message, configures a trigger message as a result of the scheduling (S104), and broadcasts it to the entire network (S105).

The source node-side converter 300 can know the time when it is scheduled through a trigger message, and transmits data to the destination node-side converter 300 at this time (S106).

The converter 300 to the destination node, which has received the data, searches the address conversion table that it has, finds the address of the control device 200, which is the destination node to receive the data, and converts it into a Profibus frame (S107). It is transmitted to the network (S108).

On the other hand, the specific method for converting various communication protocols by the converter 300 may vary depending on the delay time and reliability required by specific industrial applications, and may also vary according to the requirements of the manufacturer of the industrial equipment 100. have.

9 is a block diagram of industrial equipment according to an embodiment.

Referring to FIG. 9, the industrial equipment 100 constituting the industrial communication system 1000 or the control device 200 for controlling the industrial equipment 100 is a network card 110 similar to the converter 300 of FIG. 6. , The data link layer 120 and the integration layer 130, and, unlike the control layer 360 of the converter 300, includes an application layer 140. The industrial equipment 100 or the control device 200 of the industrial equipment 100 may be referred to as a node.

Since the roles of the network card 110 and the data link layer 120 of the node are the same as those of the converter 300 of FIG. 6, a description thereof will be omitted.

The integration layer 130 of the node is a layer that maintains the logical address of each device. And when a new control application is started, it transmits the message requirements required by the application to the converter 300. In addition, when a new message is added or deleted, and when the requirements of the message are changed, it is transmitted to the converter 300. In addition, it provides an API that enables the control application program to transmit and receive data in an integrated environment.

The application layer 140 of the node provides various application services required in a process control and factory automation environment such as remote variable input/output, program and data file transmission, program remote management, and various event processing.

Through the industrial communication system 1000 proposed by the present invention, it is possible to verify whether the smart factory can be accommodated through 5G communication, and then, specific cases for each field may be individually verified.

For example, in the case of delay time, condition monitoring, non-real-time applications targeting a delay time of 100 ms or less for process automation (Non Real Time, NRT), real-time applications targeting a delay time of 10 ms or less for factory automation ( Real Time, RT), and Isochronous Real Time targeting a delay time of less than 1ms for motion control, etc.

In addition, new equipment that allows easy IP application such as non-real-time facility status monitoring, emergency control, cloud machine vision, robot collaboration, etc., by prioritizing and verifying cases suitable for IP communication such as control/video data. It can provide useful services by verifying, etc.

According to the present invention, it is possible to rapidly support a new industrial service not only for industrial equipment currently used but also for industrial equipment to which a standard is applied later.

In addition, it is possible to contribute to 5G standardization activities related to smart factories by verifying in advance whether the smart factory where the 5G network is introduced can accommodate the services of various protocols that exist.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (8)

As a converter that connects 5G networks with industrial sites using a time-sensitive networking (TSN) interface,
Format conversion for determining the format type of data received from any one of the industrial equipment, the control device of the industrial equipment, or any node of the 5G network, and converting the format of the received data according to the communication interface of the transmission target node Device, and
A time synchronization device for synchronizing time between the arbitrary node and the transmission target node,
The communication interface of the transmission target node is one of the TSN interface or the 5G interface. In claim 1,
The time synchronization device,
A converter that is directly connected or indirectly connected to the grand master clock of the TSN interface or the grand master clock of the 5G network. In claim 1,
The converter,
The converter further comprising a frequency conversion device for matching the frequency of the 5G network with a dedicated frequency or any common frequency allocated to the TSN interface. As a converter that connects 5G networks with industrial sites using a unique Ethernet interface,
Format conversion for determining the format type of data received from any one of the industrial equipment, the control device of the industrial equipment, or any node of the 5G network, and converting the format of the received data according to the communication interface of the transmission target node Device, and
A time synchronization device for synchronizing time between the arbitrary node and the transmission target node,
The communication interface of the transmission target node is one of the unique Ethernet interface or 5G interface, the converter. In claim 4,
The converter,
Profinet network card physically connected to the industrial equipment or the control device,
5G network card connected wirelessly or wired to any node of the 5G network,
A data link layer that detects an error in the received data and corrects the detected error,
An integration layer that processes the frame of the received data according to the communication interface of the transmission target node, and
And a control layer responsible for scheduling the unique Ethernet interface and the 5G network based on the received data. As a converter that connects 5G networks with industrial sites using fieldbuses,
Format conversion for determining the format type of data received from any one of the industrial equipment, the control device of the industrial equipment, or any node of the 5G network, and converting the format of the received data according to the communication interface of the transmission target node Device, and
A time synchronization device for synchronizing time between the arbitrary node and the transmission target node,
The communication interface of the transmission target node is one of the fieldbus or 5G interface, the converter. In paragraph 6,
The converter,
Create and manage a bridge table that matches logical addresses corresponding to nodes constituting the industrial site and the 5G network with actual physical addresses of the nodes,
A converter for converting a logical address of the transmission target node included in the received data into a physical address according to the bridge table. In paragraph 6,
The time synchronization device,
A converter that periodically transmits a random message to the transmission target node.

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