KR101968522B1 - Method and remote terminal unit for classifying and transmitting data with multi-channel at supervisory control and data acquisition system - Google Patents

Abstract

The present invention relates to a remote terminal unit (RTU) of a remote monitoring/control system. According to the present invention, the RTU: receives site data from any one of a plurality of site facilities and analyzes the site data to recognize a type of the received site data; determines at least one channel from a multichannel, which corresponds to a communication path from the RTU to a plurality of servers included in different local networks through a wide area network, in accordance with the type of the site data; acquires an address of at least one node among nodes of the at least one channel; and, based on the address of the at least one node, generates a packet for transmitting the site data to a server corresponding to the final destination of the received site data among the plurality of servers through the determined channel, and transmits the generated packet through the determined channel. Accordingly, the RTU recognizes a type of site data received from each site facility, determines a channel for transmitting the site data among the plurality of servers in accordance with the type of the site data, and classifies and transmits the site data to each server belonging to a different local network through the determined channel, thereby efficiently transmitting site data to each server in a remote monitoring/control system including the plurality of servers.

Description

[0001] The present invention relates to a method and a remote terminal unit for classifying and transmitting data using multi-channels in a remote monitoring control system, and a remote terminal unit for classifying and transmitting data using multi-

The present invention relates to a method and apparatus for classifying and transmitting data in a supervisory control and data acquisition system, and more particularly, to a method and apparatus for classifying and transmitting data in a supervisory control and data acquisition system. And a remote terminal unit.

Supervisory Control and Data Acquisition system collects the field data from the field facilities such as sensors and instruments installed in the remote site, which shows the measured values of the field facilities, by the Remote Terminal Unit (RTU) , And transmits the site data collected by the remote terminal unit to the server installed in the central monitoring center through the network, thereby monitoring and controlling the situation of the site on-line.

Generally, in the remote monitoring control system, the field facility transfers the field data of the field facility to the RTU, and the remote terminal unit transfers the field data transmitted from the plurality of field facilities to the server. The server can monitor and control the situation of the site through the field data transmitted from each site facility. The remote monitoring and control system can be composed of various types of field facilities. Various types of on-site facilities include, for example, pumps, pressure gauges, flow meters, water meters, water quality meters, cameras, and the like.

The remote terminal unit of the remote surveillance control system receives different types of field data from various types of field facilities to various types of field facilities. For example, the remote terminal unit receives field data representative of measured values of power, pressure, flow rate, etc. from the field facility and receives field data representative of the image from some other field facility. The remote terminal unit may receive different types of field data from the field facility, such as field data representative of measurements and field data representative of the image.

Conventional remote terminal units merely receive field data from the field facility or transmit control commands to the field facility, but do not have the capability to analyze or process the field data received from the field facility. In addition, the conventional remote terminal unit is connected only to a master relay device or a server which is one master device. The remote terminal unit 2 can transmit the received field data to each site facility only with one master relay apparatus connected thereto. Accordingly, the conventional remote terminal unit only transmits all the site data received from the field facility to the master relay device or the server, which is a connected master device. The master relay device or the server receiving the field data of each field facility from the remote terminal unit analyzes and classifies the field data of each received field facility and transmits the field data to the required server. Since the conventional remote terminal unit does not have the function of analyzing and classifying data and is capable of communicating with only one host device, it transmits the field data of all the field equipments to one connected host device and analyzes and classifies the data in the host device To another server located in another local area network.

Accordingly, a remote monitoring and control system including a conventional remote terminal unit essentially requires a master relay apparatus having a function of analyzing, classifying, and calculating field data for each local network. In addition, since the master relay apparatus classifies the field data received from the remote terminal unit and transmits it to the server of the other local network different from the master relay apparatus, communication resources are wasted and data processing is delayed.

Referring to FIG. 1, the conventional remote terminal unit 2 transmits the field data received from the field facility to the first master relay apparatus 4 of the first regional network, which is connected to the remote terminal unit 2, ). Accordingly, the conventional remote terminal unit 2 can not transmit the field data representing the image transmitted from the camera directly to the video server 10 of the second area network, and the first master relay apparatus 4 of the first area network , The first master relay device 4 classifies the field data representing the image in the field data received from the remote terminal unit 2 and transmits the field data representing the image back to the second master relay (5) and the second hub or switch device (7) to the video server (10).

The first master relay device 4 transmits the field data to be transmitted to the HMI (Human Machine Interface) server 8 and the database server 9 disposed in the first area network to the first hub or switch device (6), and the first hub or switch device (6) classifies and transmits the data to the HMI server (8) and the database server (9).

In addition, the conventional remote terminal unit does not support a wireless communication function, and wirelessly communicates with a server or a master relay device via a separate wireless router. A conventional remote terminal unit transmits field data to a server through wired communication, and transmits field data to a server through wireless communication when a fault occurs in the wired communication. Since the conventional remote terminal unit wirelessly communicates with the server through a separate wireless router, even if the wired communication is restored after changing the communication method by wireless communication due to an error of the wired communication, the communication method can be automatically changed to wired communication There was no problem.

For example, referring to FIG. 1, a conventional remote terminal unit 2 is connected to the Internet through wired communication, and transmits the field data to the first master relay device 4 and the database server 9 via the Internet do. The remote terminal unit 2 transmits the field data to the wireless router 3 connected to the remote terminal unit 2 and transmits the field data to the wireless router 3 when the wireless terminal unit 2 can not transmit the field data through wired communication, Transmits the field data to the first master relay device (4) and the database server (9) through wireless communication. Since the conventional remote terminal unit 2 wirelessly communicates via the separate wireless router 3, the communication system can not be changed again from the wireless communication to the wired communication even if the wired communication of the remote terminal unit 2 is restored.

Korean Patent Laid-Open Publication No. 10-2018-0109566 entitled " Data Transfer Relay Device in SCADA System " relates to a data transfer relay device for relaying data transfer between a host server and a remote terminal of a Scada system, The protocol of the device data acquired from the terminal is converted into the protocol of the host server and the device data is transmitted to the host server through the communication service of the host server corresponding to the communication service of the remote terminal, And a method for integrally managing data acquired from a remote terminal. Such a conventional data transfer relay device converts protocols of various device data into protocol of the host server in the Scada system and transmits them to the host server but does not transmit them to different servers depending on the type of data. And has to be transmitted to different servers again. In addition, since the data transfer relay device does not have a function of changing to wireless communication when a fault occurs in the wired communication between the data transfer relay device and the host server, even if there is a problem in the wired communication between the data transfer relay device and the host server, There is a problem in that communication with the host server can not be maintained.

And a method for identifying and classifying the site data in the remote monitoring control system and transmitting the same to each of a plurality of servers and a remote terminal unit. Further, the present invention is not limited to the above-described technical problems, and another technical problem may be derived from the following description.

A remote terminal unit of a remote monitoring control system according to an embodiment of the present invention includes: a data receiving unit for receiving field data from any one of a plurality of field facilities; A data analyzer for identifying the type of the received field data by analyzing field data received by the data receiver; Determines at least one channel among multi-channels corresponding to a communication path from the remote terminal unit to a plurality of servers belonging to different local networks via the wide area network according to the type of the field data identified by the data analysis unit A channel management unit for obtaining an address of at least one of the nodes of the determined at least one channel; And a packet for transmitting the received field data to a server corresponding to a final destination of the received field data among the plurality of servers through the determined channel, based on the address of the at least one node obtained by the channel manager And transmits the generated packet.

Wherein the channel management unit refers to a channel table in which addresses of nodes for connecting to the respective local networks via the wide area network and addresses of any one of the plurality of servers are mapped by a plurality of data types, Determining at least one channel of the multi-channels according to the type of field data, and obtaining an address of at least one of the nodes of the determined at least one channel.

The address of the node for connecting to each local network is the address of the hub or switch of each local network or the address of the VPN server of each local network.

Wherein the IP address of the hub or switch of the local network to which the first server belongs and the TCP port number of the first server are recorded in the channel table, The IP address of the mapped VPN server and the address of at least one of the plurality of servers are recorded.

Wherein the communication unit comprises: a packet generation module for generating the packet; A wired communication module for transmitting the generated packet to the wide area network by wire, and transmitting the generated packet through the determined channel; A wireless communication module for wirelessly transmitting the generated packet to the wide area network to transmit the generated packet through the determined channel; A switching module for switching a communication mode of the remote terminal unit between the wired communication module and the wireless communication module; And a switching control module for controlling switching of a communication mode of the switching module.

Wherein the switching control module switches the communication mode of the remote terminal unit from wired communication by the wired communication module to wireless communication by the wireless communication module when wired communication by the wired communication module is disabled, And controls the switching module to switch the communication mode of the remote terminal unit from the wireless communication by the wireless communication module to the wired communication by the wired communication module when the wireless communication by the module is disabled.

The switching control module controls the switching module to switch the communication mode of the remote terminal unit to the wired communication when both the wired communication and the wireless communication are normal.

The switching control module controls the switching module to switch the communication mode to a communication mode with a higher communication quality during the wired communication and the wireless communication when both the wired communication and the wireless communication are normal.

A method for identifying and classifying data according to another embodiment of the present invention and transmitting the same to a plurality of servers, the method comprising: receiving field data from any one of a plurality of field facilities at a remote terminal unit; Identifying the type of field data by analyzing the field data received by the remote terminal unit; Determining at least one channel among a plurality of channels corresponding to a communication path from the remote terminal unit to a plurality of servers belonging to different local networks via the wide area network according to the type of the identified field data; Obtaining an address of at least one of the nodes of the determined at least one channel; Generating a packet for transmitting the received field data to a server corresponding to a final destination of the received field data among the plurality of servers through the determined channel based on the obtained address of the at least one node; And transmitting the generated packet through the determined channel.

A remote terminal unit in a remote monitoring control system sets a channel with each of a plurality of servers arranged in different local networks, analyzes data received from a plurality of field facilities to identify the type of data, A channel to transmit data is determined according to the type of data identified among the multi-channels, which is a communication path to each of a plurality of servers belonging to different local networks. By determining the channel through which the remote terminal unit transmits data according to the type of data, the remote terminal unit can classify and transmit the data of the field facility to each server requiring the corresponding data. Since each server can receive only necessary data from the remote terminal unit directly from the server, it is not necessary to classify the data into a server arranged in another local network and transmit it again or receive data again from another server. Accordingly, in the remote monitoring control system, the remote terminal unit can quickly distribute the data received from the plurality of field equipments to the respective servers belonging to different local networks, and each server receiving the data can use the data The status of the field and on-site facilities can be quickly provided to the manager of the remote monitoring and control system.

In addition, since the remote terminal unit classifies, analyzes, and computes the data of the field facility, and the remote terminal unit directly transmits the data to the server of each local network, the conventional remote monitoring and control system classifies, It may not be provided for each local network. Accordingly, it is not necessary to provide a master relay apparatus, which is an expensive apparatus, for each local network, so that it is possible to greatly reduce the cost required when installing the remote monitoring and control system.

In addition, since the remote terminal unit includes both the wireless communication function and the wired communication function, even if a failure occurs in either the wireless communication or the wired communication, the data is transmitted to the server through the other communication method, The data can be reliably transmitted to the server. Thus, the remote monitoring control system can always maintain the best communication state.

In addition, when the wired communication is restored while the remote terminal unit is transmitting data by wireless communication, it is possible to prevent excessive communication charges that may occur due to the wireless communication by switching the communication mode back to wired communication.

1 is a view showing a remote monitoring control system including a conventional remote terminal unit.
2 is a view illustrating a remote monitoring and control system including a remote terminal unit according to an embodiment of the present invention.
3 is a block diagram illustrating a configuration of a remote terminal unit shown in FIG. 2 of FIG. 3. FIG.
4 is a flowchart of a method of identifying and transmitting data in a remote monitoring and control system according to the embodiment of FIG. 2 of the present invention.
5 is a detailed flowchart of a step of transmitting a packet shown in FIG. 4 of the present invention through a channel.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Embodiments of the present invention will be described below. In a remote monitoring control system including a plurality of on-site facilities, a remote terminal unit (RTU), a master relay device, and a server, To each of the servers. As a person skilled in the art to which the embodiments of the present invention belong, those skilled in the art will appreciate that the " remote monitoring " control system, which will be described below, transmits various states and information at remote locations to a central monitoring and control system, (SCADA) system, a remote monitoring and control system, and the like, by analyzing and controlling information and effectively operating various facilities. The term " on-site facility " means a device installed on a site located at a remote location of a server, including devices for power devices, various sensors, and electronic devices for transmission and distribution, Quot; means an apparatus or a communication processing apparatus, and the " address " includes a fixed IP address, a private IP address, a TCP / UDP port number, and the like. Further, numerals (e.g., first, second, etc.) used in the description process of the present invention are used as an identifier for distinguishing one component from another component.

2 is a view illustrating a remote monitoring and control system including a remote terminal unit according to an embodiment of the present invention. Referring to FIG. 2, the remote monitoring and control system includes a plurality of on-site facilities 1, a remote terminal unit 20, a first hub or switch device 6, a second hub or switch device 7, An HMI (Human Machine Interface) server 8, a database server 9, and a video server 10. 2 includes the HMI server 8, the database server 9 and the video server 10, but this is only one embodiment. In the remote monitoring control system according to another embodiment, the remote monitoring control system shown in FIG. But may include other servers than servers.

Referring to the embodiment shown in FIG. 2, a plurality of on-site facilities 1 are connected to the remote terminal unit 20, respectively. Each of the plurality of the field equipments 1 transmits the field data generated in each of the field equipments 1 through the set communication link with the remote terminal unit 20. The field facility 1 includes, for example, a pump, a pressure gauge, a flow meter, a water gauge, a water quality meter, a camera, and the like. For example, when the field facility 1 is a watt hour meter, the watt hour meter measures the power value used in the field, transmits the field data indicating the measured power value to the remote terminal unit 20, ) Is a camera, the camera generates field data representing an image of the field, and transmits the field data representing the generated image to the remote terminal unit 20.

The remote terminal unit 20 receives the field data of each field facility from each of the plurality of field facilities 1, analyzes the field data of the received field facility 1, identifies the type of field data, To a hub or switch device or server belonging to the < / RTI > The remote terminal unit 20 can classify and transmit the field data of the field facility to each server among a plurality of servers disposed in different regional networks in the remote monitoring control system. The remote terminal unit 20 receives control commands for the respective field equipments from the server and transmits the received control commands to the respective field equipments 1 so that the server can control each of the field equipments 1 Let's do it.

The remote terminal unit 20 establishes a communication link with each field facility 1 and receives field data from each field facility 1 via a set communication link. The remote terminal unit 20 can establish a communication link with each field facility 1 in various ways. For example, the remote terminal unit 20 can establish a communication link with the field facility 1 in a manner such as RS-232 communication, RS-485 communication, analog communication, digital communication, Ethernet, and the like.

Also, the remote terminal unit 20 can process the field data transmitted from each field facility 1 according to the type of each server. For example, the remote terminal unit 20 analyzes the field data transmitted from each field facility 1 to determine whether each field facility 1 is operating normally, and determines whether each field facility 1 The operation state data can be generated. The remote terminal unit 20 transmits the operation state data indicating the operation state of each field facility 1 to the HMI server 8 of the first area network and transmits the operation state of each field facility 1 to the remote monitoring control system It can be provided to the administrator.

According to another example, the remote terminal unit 20 may analyze the field data transmitted from each field facility 1 to generate a graph of the change in the measured values measured by each field facility 1. [ When the field facility is a flow meter, the remote terminal unit 20 can generate a graph showing the change in the flow rate flowing in the pipe in real time. In the case of the pressure gauge, the remote terminal unit 20 can change the pressure of the pipe in real time You can create a graph to represent. The remote terminal unit 20 transmits processing data representing the generated graph to the HMI server 8, and the HMI server 8 can output the graph and provide it to the manager. As described above, the remote terminal unit 20 can perform a process such as analyzing or calculating the field data of the field facility 1, and transmit the generated process data to the HMI server 8.

The hubs or switch devices 6 and 7 located in each local network receive data from the remote terminal unit 20 and route the received data to each server connected to the hub or switch device 6,7. The hub or switch devices (6, 7) serve to classify and relay the data transmitted from the remote terminal unit (20) to the server. More specifically, the first hub or switch device 6 of the first area network receives the field data and processing data transmitted from the remote terminal unit 20 via the wide area network, and transmits the received field data and the destination of the processing data And routes it to the database server 9 and the HMI server 8 based on the address of the server. The first hub or switch device 6 routes the on-site data representing the measured out of the data transmitted from the remote terminal unit 20 to the database server 9 and routes the processed data to the HMI server 8. A second hub or switch device (7) of the second area network receives the field data representative of the image from the remote terminal unit (20) and routes the received field data to the video server (10).

The first hub or switch device 6 located in the first area network transmits the field data representing the measured value transmitted from the remote terminal unit 20 to the database server 9 and transmits And transmits the processed data to the HMI server 8. The second hub or switch device 7 located in the second area network transmits the field data representing the image transmitted from the remote terminal unit 20 to the video server 10.

The database server 9 receives the field data transmitted from the first hub or switch device 6 and stores the measurements indicated by the received field data in the storage of the database server 9. The database server 9 receives data from a field facility 1 for measuring a specific state of a field such as a power meter, a hydraulic meter, a pressure gauge or the like among a plurality of the field equipments 1, Receives the data representing the measured value, and stores the received measured value in the storage of the database server 9. [ The database server 9 receives and stores the unprocessed data in the remote terminal unit 20.

The video server 10 receives the data transmitted from the second hub or the switch device 7 and outputs the received data through the output device connected to the video server 10 or stores the data in the storage of the video server 10 . The video server 10 receives on-site data representing an image from a field facility for photographing an image, such as a camera, among a plurality of the field facilities 1. The video server 10 may output the field data representing the received image to an administrator of the remote monitoring control system by using an output device such as a monitor, a printer, or the like.

The HMI server 8 receives the processing data processed from the remote terminal unit 20 and provides the received processing data to the manager of the remote monitoring control system through a graph, a diagram, an image, and the like. The HMI server 8 receives the processing data from the remote terminal unit 20 and outputs the current state of the remote monitoring control system based on the processing data. For example, the HMI server 8 receives the processing data for the pump and the flow meter in the field facility 1 from the remote terminal unit 20, and informs the manager of the fact that the pump is currently operating and the flow rate flowing in the present pump .

Also, the HMI server 8 can receive control commands for the respective field equipments 1 from the manager, and transmit control commands of the inputted field equipments 1 to the respective field equipments 1 through the master relay device and the remote terminal units (1). The HMI server 8 can control the operation of each field facility by transmitting the input control command to each field facility through the remote terminal unit 20. [

3 is a block diagram illustrating a configuration of a remote terminal unit shown in FIG. 2 of FIG. 3. FIG. 3, the remote terminal unit 20 includes a data receiving unit 201 for receiving data from a plurality of the field equipments 1, a data analyzing unit 202 for analyzing the field data received from each of the field equipments 1, A channel management unit 203 for managing multi-channels corresponding to communication paths to a plurality of servers, and a communication unit 204 for transmitting the packets to a plurality of servers arranged in different local networks via a wide area network.

The data receiving unit 201 of the remote terminal unit 20 receives the field data from any one of the plurality of the field equipments 1. The data receiving unit 201 receives the site data generated by each site facility 1 from each site facility 1 through a communication link established with each of the plurality of site facilities 1. The data receiving unit 201 inputs the field data received from each field facility 1 to the data analysis unit 210.

The data analysis unit 202 analyzes the field data of each field facility 1 inputted from the data reception unit 201, thereby identifying the type of field data. The data analysis unit 202 analyzes the field data and identifies the type of the field data. More specifically, the data analysis unit 202 analyzes the type of data represented by the field data of each field facility 1. For example, the field facility 1 includes on-site facilities for generating field data representative of measured values such as pressure gauges, flow meters, water gauges, etc., and on-site facilities for generating field data representative of images such as cameras. The data analysis unit 202 analyzes whether the field data of each field facility 1 is data indicating measured values such as pressure, electric power, water level, etc., data indicating an image, and the like. The data analysis unit 202 identifies the type of field data of each field facility 1 based on the analysis result. The data analysis unit 202 identifies whether the field data is a data type indicating a measurement value or a data type indicating an image. The data analysis unit 202 inputs the type of the identified field data to the channel management unit 203.

According to another embodiment of the present invention, the remote terminal unit 20 further includes a data processing unit (not shown). The data processing unit receives the field data of the field facility 1 received from the data receiving unit 201. The data processing section can collect the field data of each field facility 1 input from the data receiving section 201, perform arithmetic processing such as calculation and filing, and generate processing data indicating the arithmetic processing result. For example, the data processing unit may calculate the total amount of power used in the field by summing all the power values indicated by the field data transmitted from each of the plurality of power meters installed in the field, and generate the processing data indicating the total amount of power.

The data processing section determines whether or not each of the field equipments operates normally based on the field data transmitted from each of the field equipments (1), and based on the discrimination result, processing data indicating that each of the field equipments (1) Lt; / RTI > For example, the data processing unit can determine whether the measurement value indicated by the field data of the field facility 1 is compared with the normal range of the measured value of the field facility to determine whether the field facility is operating normally. The data processing unit determines that the operation of the relevant field facility is normal when the measured value indicated by the field data is within the normal range, and generates the process data indicating that the relevant field facility is normal. On the other hand, when the measured value indicated by the field data is outside the normal range, the data processing unit determines that the operation of the relevant field facility is abnormal and generates the process data indicating that the field facility is abnormal. The data processing unit inputs the generated processing data to the data analysis unit 202. The data analysis unit 202 analyzes the processing data generated by the data processing unit and identifies that the processing data is a processing data type indicating data processed by the data processing unit.

The channel management unit 203 manages a plurality of channels corresponding to communication paths from a remote terminal unit to a plurality of servers belonging to different local networks via a wide area network in accordance with the type of field data identified by the data analysis unit 202 Determine at least one channel to transmit each field data, and obtain the address of at least one of the nodes of the determined at least one channel. More specifically, the channel management unit 203 determines a channel through which data is to be transmitted according to the type of the field data identified by the data analysis unit 202. In this specification, a channel corresponds to a communication path for transmitting data, and may include at least one node having a source and a destination, and relaying data between the source and destination. In this embodiment, a channel means a communication path from the remote terminal unit 20 to each server belonging to a different local area network. For example, the remote surveillance control system shown in FIG. 2 may include a first channel, a first hub, or a switch device (not shown) connected to the first hub or switch device 6 and the HMI server 8 from the remote terminal unit 202 6 and a database server 9, and a third channel connected to the second hub or switch device 7 and the video server 10.

The channel management unit 203 determines at least one channel to transmit the field data among the multi-channels connected to the remote terminal unit 20 based on the type of the field data identified. The channel management unit 203 determines a server corresponding to a final destination to which each site data is to be transmitted according to the type of site data, and determines a channel including the determined server. More specifically, the channel management unit 203 refers to the channel table recorded by mapping the address of the node for connecting to each local network via the wide area network and the address of any one of the plurality of servers by data type And determines at least one of the multi-channels according to the type of field data identified. Here, the node is a terminal device or a communication processing device having a communication function, and in this specification includes a hub or a switch device, and servers.

The channel table can be stored in the storage (not shown) of the remote terminal unit 20. The channel table maps the channels for transmitting the field data and the addresses of the nodes included in each channel according to the type of field data. The channel table records the addresses of at least one node included in each channel (for example, a server, a node for connecting to a local network to which the server belongs, etc.). More specifically, the channel table stores a channel for transmitting the corresponding data type for each data type, records the address of the final destination server of each channel, and at least one node to be connected to the final destination server of the corresponding data type Address is recorded. A node for accessing each local network includes a hub or a switch device of each local network and a virtual private network (VPN) server of each local network. The address of a node for connecting to each local network includes a local area network The address of the hub or switch device of the local network and the address of the VPN server of each local network. Here, the address includes a fixed IP address, a private IP address, a MAC address, a TCP / UDP port number, and the like.

In one embodiment of the present invention, the channel table is configured such that the first channel is mapped to the first data type, the IP address of the hub or switch device of the local network to which the first server, which is the final destination, And the TCP / UDP port number of the first server are recorded together in the first channel, the second channel is mapped to the second data type, and the second server, which is the final destination, belongs to the second channel among the plurality of servers The IP address of the VPN server of the virtual private network, and the private IP address of the second server are recorded together in the first channel.

For example, in the channel table, a first channel composed of the first hub or the switch device 6 and the database server 9 is mapped to the type of the field data indicating the measured value, and the first channel included in the first channel The address of the hub or switch device 6 and the address of the database server 9 are recorded together in the first channel portion to which they are mapped. Here, the final destination server of the first channel is the database server 9, and the first hub or switch device 6 is the node which must go through to access the database server 9. [ A second channel composed of the second hub or switch device 7 and the image server 10 is mapped to the type of field data representing the image in the channel table and the second hub switch device 7 And the address of the video server 10 are mapped to the address of the video server 10, and the first hub or switch device 6 and the HMI server 8 are connected to the type of process data processed and processed by the data processor, And the address of the first hub or switch device 6 included in the third channel and the address of the HMI server 8 are mapped together in the third channel part.

The channel management unit 203 determines a channel for transmitting the field data based on the type of field data identified and the channel table. For example, when the identified type of field data is a data type indicating a measured value, the channel management unit 203 determines the database server 9 as the final destination of the field data indicating the measured value with reference to the channel table, The second channel including the database server 9 can be determined as a channel for transmitting the field data. The channel management unit 203 determines the video server 10 as the final destination of the field data representing the image by referring to the channel table when the identified type of field data is a data type representing the image, It is possible to determine the third channel including the channel as the channel for transmitting the field data. The channel management unit 203 determines the HMI server 8 as the final destination of the processing data by referring to the channel table when it is identified by the processing data generated by the data processing unit, The channel can be determined as a channel for transmitting processing data.

Also, the channel management unit 203 obtains the address of at least one node included in the determined channel by referring to the channel table. The channel management unit 203 obtains the address of the hub or the switch device and the server included in the channel determined according to the type of the identified field data. 2, when the channel management unit 203 determines that the first channel including the first hub or the switch device 6 and the database server 9 is a channel for transmitting the field data representing the measured value, 1 address of the hub or switch device 6 and the address of the database server 9 are acquired. The channel management unit 203 inputs the acquired address of at least one node to the communication unit 204.

The communication unit 204 acquires, via the channel determined by the field data received from the field facility 1, a packet to be transmitted to the server corresponding to the final destination of the field data received among the plurality of servers by the channel management unit 203 Based on the address of at least one node that has been determined, and transmits the generated packet through the determined channel. The communication unit 204 establishes a channel for transmitting data through a plurality of servers belonging to different local networks and a wide area network (WAN) such as the Internet. The communication unit 204 includes an address of at least one node included in the determined channel in the header of the packet, and generates a packet including the field data in the body of the packet. The communication unit 204 transmits the generated packet to the final destination server through the determined channel. For example, when the type of the field data is field data indicating a measured value, the communication unit 204 includes the address of the first hub or the switch device 6 and the address of the database server 9 in the header of the packet, And generates a packet including the measured value in the body of the packet. Then, the communication unit 204 transmits the packet generated through the second channel including the first hub or the switch device 6 and the database server 9.

More specifically, the communication unit 204 includes a packet generation module 2041, a wired communication module 2043, a wireless communication module 2044, a switching module 2043, and a switching control module 2045. The packet generation module 2041 includes an address of at least one node obtained by the channel management unit 203, and generates a packet including each field data. The packet generation module 2041 includes an address of a node to be connected to at least one node included in a channel determined according to the type of each field data, i.e., a node to which the final destination server and the final destination server belong, in the header portion , And generates a packet including the field data in the body part.

For example, in the channel management unit 203, the field data is identified as a type indicating the measured value, so as to determine a first channel constituted by the first hub or switch device 6 and the database server 9, When the address of the device 6 and the database server 9 are acquired, the packet generation module 2041 generates a packet for transmitting the field data representing the measured value to the database server 9 via the first channel. The packet for transmission to the database server 9 includes the address of the first hub or switch device 6 and the address of the database server 9 in the header part and includes the field data indicating the measured value in the body part. The packet generation module 2041 inputs the generated packet to the switching module 2042.

It is also possible to determine in the channel management section 203 the second channel in which the field data is identified as a type representing the image and which is constituted by the second hub or switch device 7 and the video server 10 and the second hub or switch device 7 And the address of the video server 10, the packet generation module 2041 generates a packet for transmitting the field data representing the image to the video server 10 through the second channel. The packet for transmission to the video server 10 includes the address of the second hub or switch device 7 and the address of the video server 10 in the header portion and includes the field data representing the image in the body portion.

It is also possible to determine a third channel identified by the type of process data in the channel management unit 203 and constituted by the first hub or switch device 6 and the HMI server 8 and to determine the third channel constituted by the first hub or switch device 6 and the HMI When the address of the server 8 is acquired, the packet generation module 2041 generates a packet for transferring the processing data to the HMI server 8 via the third channel. The packet to be transmitted to the HMI server 8 includes the address of the first hub or switch device 6 and the address of the HMI server 8 in the header part and includes processing data in the body part.

The switching module 2042 switches the communication method between the wired communication and the wireless communication so that the remote terminal unit 20 is communicably connected to the wide area network. The switching module 2042 switches the communication mode between the wired communication and the wireless communication and inputs a packet input from the packet generation module 2041 to the wired communication module 2043 or the wireless communication module 2044. The switching module 2042 is controlled by the switching control module 2045. When the switching module 2042 changes the communication mode to wired communication, the switching module 2042 inputs the packet input from the packet generation module 2041 to the wired communication module 2043. When the switching module 2042 changes the communication mode to wireless communication, the switching module 2042 inputs the packet input from the packet generation module 2041 to the wireless communication module 2044.

The switching control module 2045 controls switching of the communication mode of the switching module 2042. [ The switching control module 2045 determines whether to switch the communication mode to either wired communication or wireless communication based on the state of the wired communication by the wired communication module 2043 and the wireless communication by the wireless communication module 2044. [ More specifically, when the wired communication by the wired communication module 2043 is disabled, the switching control module 2045 switches the communication mode from wired communication to wireless communication, and wireless communication by the wireless communication module 2044 is disabled The switching module 2042 is controlled to switch the communication mode from wireless communication to wired communication.

When the switching module 2042 is connected to the wired communication module 2043, the wired communication module 2043 determines whether a data request frame or an acknowledgment frame is received from any of the plurality of servers It is determined whether the wired communication by the wired communication module 2043 is normal or not. When the switching module 2042 is connected to the wireless communication module 2044, the switching control module 2045 determines whether the wireless communication module 2044 receives a data request frame or an acknowledgment frame from any one of the plurality of servers Determines whether the wireless communication by the wireless communication module 2044 is normal or impossible. The switching control module 2045 is connected to the switching module 2042 when the data request frame or the acknowledgment frame is not received from the wired communication module 2043 or the wireless communication module 2044 to which the switching module 2042 is connected, It is determined that the communication by the module 2043 or the wireless communication module 2044 is disabled.

The switching control module 2045 controls the switching module 2042 to switch the communication mode from wired communication to wireless communication when wired communication by the wired communication module 2043 is disabled. The switching control module 2045 controls the switching module 2042 to switch the communication mode from wireless communication to wired communication when wireless communication by the wireless communication module 2044 is disabled. When the wired communication by the wired communication module 2043 is disabled, the remote terminal unit according to the present invention switches the communication mode by wireless communication and wirelessly transmits the packet to each server. On the other hand, when the wireless communication module 2044 When the wireless communication is impossible, the communication method is switched by wired communication and the packet is transmitted to each server by wire. When either one of the wired communication and the wireless communication is disabled, the communication method is switched to another communication which is normal, so that the packet can be transmitted stably even if some communication is impossible. Even if some communication function of the remote terminal unit 20 is disabled, the communication connection with the server can be maintained.

The switching control module 2045 controls the switching module 2042 to switch the communication mode to wired communication when both the wired communication by the wired communication module 2043 and the wireless communication by the wireless communication module 2043 are normal do. When both the wired communication and the wireless communication are normal, the remote terminal unit 20 can transmit the field data to the server in any of wired communication and wireless communication. Generally, when the communication charges of the wired communication and the wireless communication are compared, in the case of the wired communication, the charge is changed according to the communication speed, and in the case of the wireless communication, the charge is imposed according to the amount of the packet transmission. More specifically, in wired communication, the higher the communication speed, the higher the communication fee, but the communication fee does not become higher even if the transmission amount of the packet increases. On the other hand, in the wireless communication, the communication fee is charged according to the transmission amount of the packet, so that the communication fee becomes higher as the transmission amount of the packet increases. According to the difference of the communication charges, when both the wireless communication and the wired communication are normal, the transmission of the packet by the wired communication can reduce the communication cost compared to the packet transmission by the wireless communication. Accordingly, when both the wired communication and the wireless communication are normal, the remote terminal unit 20 according to the present invention controls the switching module 2042 to switch the communication mode from wireless communication to wired communication .

According to another embodiment of the present invention, when both the wired communication and the wireless communication are normal, the switching control module 2045 of the remote terminal unit 20 performs the communication method with higher communication quality during wired communication and wireless communication It is possible to control the switching module 2042 to switch. The switching control module 2042 may determine the communication quality of the communication scheme in which the packet is currently being transmitted and may control the switching module 2042 to switch to another communication scheme when the quality of the current communication scheme is below a predetermined level. The communication quality is determined by at least one of a received signal strength indicator (RSSI), a reference signal received power (RSRP), a reference signal received quality (RSRQ), a loss rate of a data packet, and quality of service . For example, the communication unit 204 can determine the communication quality based on the reception strength of the signal received by the communication unit 204. [ When the reception intensity of the received signal is equal to or less than the threshold value, the communication section 204 can determine that the communication quality of the current communication method is bad.

For example, when the reception strength of a signal received by the wireless communication module 2044 of the remote terminal unit 20 is equal to or less than the threshold value, the switching control module 2045 determines that the communication quality of the wireless communication is bad, The switching module 2042 can be controlled to switch from communication to wired communication. Conversely, when the loss rate of the data packet received by the wired communication module 2043 of the remote terminal unit 20 is equal to or larger than the threshold value, the switching control module 2045 determines that the communication quality of the wired communication is bad, Lt; RTI ID = 0.0 > 2042 < / RTI >

More specifically, the switching control module 2042 compares the communication quality of the wireless communication with the communication quality of the wired communication, and the communication quality of the wired communication and the communication quality of the wireless communication, It is possible to control the switching module 2042 to switch. As described above, the communication unit 204 transmits packets to each server through wired communication or wireless communication.

The wired communication module 2043 transmits the generated packet by wire to the wide area network, and transmits the generated packet through the determined channel. The wired communication module 2043 is wired to a wide area network in a manner such as Ethernet. The wired communication module 2043 transmits the generated packets to the wide area network by wire, so that the field data of each field facility 1 is transmitted to each final destination server located in different regional networks. For example, the wired communication module 2043 transmits a packet including field data representing a measured value to a wide area network by wire, and transmits a packet including field data representing a measured value to a database server (9). The wired communication module 2043 transmits the packet including the field data representing the image to the wide area network by wired line and transmits the packet including the field data representing the image to the video server 10 belonging to the second area network .

The wireless communication module 2044 wirelessly transmits the generated packet to the wide area network, and transmits the generated packet through the determined channel. The wireless communication module 2044 is wirelessly connected to the wide area network in a manner such as a wireless LAN (WLAN), a WiFi, a Bluetooth, a WCDMA, and an LTE. The wireless communication module 2044 wirelessly transmits the generated packet to the wide area network, thereby transmitting the field data of each field facility 1 to each final destination server located in different regional networks. For example, the wireless communication module 2044 wirelessly transmits a packet including field data indicating a measured value to a wide area network, and transmits a packet including field data representing a measured value to a database server (9). The wireless communication module 2044 wirelessly transmits a packet including the field data representing the image to the wide area network, and transmits the packet including the field data representing the image to the video server 10 belonging to the second area network .

According to another embodiment of the present invention, the data analysis unit 202 inputs, to the communication unit 204, a packet including processing data generated based on the field data of each site facility 1 in the data processing unit. In addition, the header of the processing data includes the address of the HMI server 8 of the remote monitoring and control system. The communication unit 204 transmits the process data to the HMI server 8 through wireless communication or wire communication. More specifically, as described above, the communication unit 204 transmits the process data to the HMI server 8 using the wireless communication module 2044 or the wired communication module 2043. [ When the wired communication module 2043 is disabled, the communication method is switched to the wireless communication module 2044 to wirelessly transmit the packet including the processing data to the HMI server 8, and conversely, when the wireless communication module 2044 is disabled The wired communication module 2043 switches the communication mode to wired communication and transmits a packet including processing data to the HMI server 8 by wire.

The database server 9 receives the packet including the field data representing the measured value of each field facility 1 from the remote terminal unit 20 and stores the measured value indicated by the field data in the storage of the database server 9 do. The database server 9 receives the packet including the field data wirelessly or by wire from the remote terminal unit 20 through a wide area network such as the Internet or the like. The database server 9 stores the measurement value indicated by the field data included in the received packet in the storage.

The video server 10 receives a packet including the field data representing an image from the remote terminal unit 20. [ The video server 10 receives a packet including field data representing an image wirelessly or wired through a wide area network from the remote terminal unit 20 and the video server 10 transmits the image represented by the field data to a monitor, Output using the same output device. Also, the video server 10 stores the field data representing the received image in the storage.

The HMI server 8 receives a packet including processing data generated in the remote terminal unit 20 from the remote terminal unit 20. [ The HMI server 8 outputs the current state of the remote monitoring control system based on the processing data included in the received packet. For example, when the HMI server 8 receives a packet containing processing data indicating the total amount of power used in the field from the remote terminal unit 20, the HMI server 8 outputs the total amount of power used in the field And outputs it to the manager of the remote monitoring and control system. Alternatively, when the HMI server 8 receives a packet including processing data indicating that any one of the field facilities is abnormal, the HMI server 8 alerts an alarm to indicate that an abnormality has occurred in the field facility, .

FIG. 4 is a flowchart of a method of classifying and transmitting data in a remote monitoring and control system according to the embodiment of FIG. 2 of the present invention. Referring to FIG. 4, a method for identifying and classifying the field data of each field facility 1 and transmitting the data to each server among a plurality of servers belonging to different local networks, comprises the following steps. Each of the steps shown in the flowchart of Fig. 4 may be performed by the remote terminal unit 20.

In step 401, the remote terminal unit 20 receives the field data from any one of the plurality of the field equipments 1. The data receiving unit 201 of the remote terminal unit 20 receives the field data from each of the plurality of field equipments 1. Each on-site facility 1 generates on-site data indicative of on-site data or images representing measured values measured by the on-site facility and transmits the on-site data to the remote terminal unit 20 connected to each on-site facility 1. The data receiving unit 201 of the remote terminal unit 20 inputs the field data of each received field facility 1 to the data analysis unit 202.

In step 402, the remote terminal unit 20 identifies the type of field data by analyzing the field data of the received field facility 1. The data analysis unit 202 of the remote terminal unit 20 analyzes the type of field data of each field facility 1. More specifically, the data analysis unit 202 analyzes whether the field data is field data indicating a measurement value or field data indicating an image, and if the type of field data is field data indicating a measurement value or field data indicating an image . In addition, the data analyzing unit 202 performs arithmetic processing on the field data of each field facility 1 in the data processing unit, analyzes the generated processing data, and identifies whether or not the data is processing data representing the arithmetic processed value.

In step 403, the remote terminal unit 20 determines at least one channel among the multi-channels corresponding to the communication paths to a plurality of servers belonging to different local networks via the wide area network according to the type of the identified field data . The channel management unit 203 of the remote terminal unit 20 refers to the channel table based on the type of the field data identified by the data analysis unit 202 and determines the channel number of each of the plurality of servers The channel for transmitting the corresponding field data is determined. More specifically, the channel management unit 203 of the remote terminal unit 20 refers to the channel table and, when the field data is identified as a data type indicating a measurement value, It is determined as a data type channel. When the field data is identified as a data type representing an image, the channel management unit 203 determines a channel including the image server 10 as a channel of a data type representing an image. In addition, when the data type is identified by the processing data generated by the data processing unit, the channel management unit 203 determines the channel including the HMI server 8 as the channel of the data type of the processing data.

In step 404, the remote terminal unit 20 obtains the address of at least one of the nodes of the determined at least one channel. The channel management unit 203 of the remote terminal unit 20 acquires the addresses of the nodes included in the determined at least one channel. More specifically, the channel management unit 230 refers to the channel table to acquire the addresses of the nodes included in the determined channel. The channel management unit 203 obtains addresses of hubs or switch devices and servers included in each channel, which is a communication path from the remote terminal unit 20 to a server belonging to different regional networks via a wide area network. For example, when the channel management unit 203 determines that the channel including the first hub or the switch device 6 and the database server 9 is a channel for transmitting a packet, the channel management unit 203 determines whether the first hub The address of the switch device 6 and the address of the database server 9 are acquired. When the channel management unit 203 determines that the channel including the first hub or switch device 6 and the HMI server 8 is a channel for transmitting a packet, the channel management unit 203 controls the first hub or switch device 6 And the address of the HMI server 8 are acquired. When the channel management unit 203 determines that the channel including the second hub or the switch device 7 and the video server 10 is a channel for transmitting a packet, the channel management unit 203 controls the second hub, (7) and the address of the video server (10).

In step 405, the remote terminal unit 20 transmits a packet for transmitting the received site data to the server corresponding to the final destination of the received site data among the plurality of servers through the determined channel to the address of the obtained at least one node . The communication unit 204 of the remote terminal unit 20 includes an address of at least one node included in the determined channel in the header of the packet and generates a packet including the field data in the body of the packet. For example, when the type of the field data is field data indicating a measured value, the communication unit 204 includes the address of the first hub or the switch device 6 and the address of the database server 9 in the header of the packet, And generates a packet including field data indicating a measurement value in the body of the packet. When the type of the field data is field data representing an image, the communication unit 204 includes the address of the second hub or switch device 7 and the address of the video server 10 in the header of the packet, Lt; RTI ID = 0.0 > field data. ≪ / RTI > In the case of the type of process data, the communication unit 204 includes the address of the second hub or the switch device 1 and the address of the HMI server 8 in the header of the packet, and includes the processing data in the body of the packet And generates a packet.

In step 406, the remote terminal unit 20 transmits the generated packet through the determined at least one channel. The communication unit 204 of the remote terminal unit 20 transmits the packet generated by the packet generation module 2041 to the final destination server wirelessly or by wire through the channel determined by the channel management unit 203. [ More specifically, when the switching module 2042 is connected to the wired communication module 2043, the switching module 2042 inputs the packet input from the packet generation module 2041 to the wired communication module 2043, 2043 transmits the generated packet to the wide area network, and transmits the generated packet to the final destination server through the determined channel. When the switching module 2042 is connected to the wireless communication module 2044, the switching module 2042 inputs the packet input from the packet generation module 2041 to the wireless communication module 2044, To the wide area network, and transmits the generated packet to the final destination server through the determined channel.

FIG. 5 is a detailed flowchart of a step of transmitting the packet shown in FIG. 4 of the present invention through a determined channel. Referring to FIG. 5, step 406 shown in FIG. 4 may include the following steps. In step 4061, the remote terminal unit 20 determines whether to transmit the packet wirelessly or by wire based on the state of the wireless communication and the wired communication. The switching control module 2045 of the remote terminal unit 20 performs the communication by either wired communication or wireless communication based on the wired communication by the wired communication module 2043 and the wireless communication by the wireless communication module 2044 And determines whether to switch the scheme.

More specifically, when the wired communication by the wired communication module 2043 is disabled, the switching control module 2045 of the remote terminal unit 20 switches the communication mode from wired communication to wireless communication so as to wirelessly transmit the packet And when the wireless communication by the wireless communication module 2044 is disabled, it decides to switch the communication mode from wireless communication to wired communication and transmit the packet by wire. In addition, when both the wired communication and the wireless communication are normal, the switching control module 2045 switches the communication mode from wireless communication to wired communication and decides to transmit the packet by wire.

According to another embodiment of the present invention, when both the wired communication module 2043 and the wireless communication module 2044 are normal, the switching control module 2045 compares the communication quality of the wireless communication with the communication quality of the wired communication, The communication quality of the communication and the communication quality of the wireless communication are switched in a communicative manner with a higher communication quality to decide to transmit the field data. The switching of the communication mode between the wireless communication module 2044 and the wired communication module 2043 will be described in detail with reference to the switching control module 2045 and the switching module 2042 described above. The switching module 2042 inputs the packet input from the packet generation module 2041 to the wired communication module 2043 and outputs the packet to the switching control module 2043. [ The switching module 2042 inputs the packet input from the packet generation module 2041 to the wireless communication module 2044. [

In step 4061, if the remote terminal unit 20 determines to transmit the generated packet by wire, the process proceeds to step 4062. If the remote terminal unit 20 determines to transmit the generated packet by wireless, the process proceeds to step 4063 do. In step 4062, the remote terminal unit 20 transmits the generated packet by wire to the final destination server of the packet generated through the determined channel. In step 4061, when it is determined to transmit to the wired communication, the remote terminal unit 20 transmits the generated packet to the final destination server through the determined channel by wire. More specifically, when it is determined to transmit the packet generated in step 4061 to the wired communication, the switching module 2042 switches the communication method from wired communication to wired communication and transmits the packet input from the packet generation module 2041 to the wired And inputs it to the communication module 2043. The wired communication module 2043 transmits wired packets to the wide area network through the input packet, and transmits the packet to the final destination server through the determined channel. The wired communication module 2403 transmits a packet generated based on the address of at least one node included in the packet generated by the packet generation module 2041 to the wired network.

For example, if the packet includes the address of the first hub or switch device 6 and the database server 9, then the wired communication module 2043 may communicate with the first hub or switch device 6 and the database server 9, To the database server 9, which is the final destination. The wired communication module 2043 is connected to the second hub or switch device 7 and the channel 10 including the video server 10 when the packet includes the address of the second hub or switch device 7 and the video server 10. [ To the video server 10 which is the final destination. The wired communication module 2043 also includes the first hub or switch device 6 and the HMI server 8 when the packet includes the address of the first hub or switch device 6 and the HMI server 8 To the HMI server 8, which is the final destination.

In step 4063, the remote terminal unit 20 wirelessly transmits the generated packet to the final destination server of the packet generated through the determined channel. If it is determined to transmit the packet generated in step 4061 through wireless communication, the remote terminal unit 20 wirelessly transmits the generated packet to the final destination server through the determined channel. More specifically, when it is determined to transmit the packet generated in step 4061 through wireless communication, the switching module 2042 switches the communication method from wired communication to wireless communication, And inputs it to the communication module 2044. The wireless communication module 2044 wirelessly transmits the input packet to the wide area network, thereby transmitting the packet to the final destination server through the determined channel. The wireless communication module 2044 wirelessly transmits a packet generated based on the address of at least one node included in the packet generated by the packet generation module 2041.

For example, if the packet includes the address of the first hub or switch device 6 and the database server 9, then the wireless communication module 2044 may communicate with the first hub or switch device 6 and the database server 9, To the database server 9 which is the final destination. When the packet includes the address of the second hub or switch device 7 and the video server 10, the wireless communication module 2044 is connected to the second hub or switch device 7, To the video server 10 which is the final destination. The wireless communication module 2044 also includes a first hub or switch device 6 and an HMI server 8 if the packet includes the address of the first hub or switch device 6 and the HMI server 8 To the HMI server 8, which is the final destination.

According to the above-described embodiments of the present invention, the remote terminal unit of the remote monitoring control system can classify the field data transmitted from the field data according to the type of the field data and transmit the classified field data to each of the plurality of servers of the remote monitoring control system. The remote terminal unit according to the present invention classifies the field data and directly transmits the field data necessary for each server to each server so that the conventional remote terminal unit is connected to only one server and transmits all field data to the connected server, It is possible to solve the problem that the server transmits data again to another server. Accordingly, the remote monitoring control system including the remote terminal unit according to the present invention classifies the field data in the remote terminal unit, identifies the type of the field data, and transmits the local data to each of the plurality of servers It is possible to directly transmit the field data to the server that needs the field data according to the type of the field data by transmitting the data directly to each server.

In addition, according to the embodiments of the present invention, the remote terminal unit includes both the wireless communication module and the wired communication module, so that even if one of the wireless communication module and the wired communication module fails, And can transmit packets to each server by switching. Accordingly, the remote terminal unit can more reliably transmit the packet to the server.

In addition, according to embodiments of the present invention, when wired communication is restored while data is transmitted to a server through wireless communication due to failure of wired communication in a remote terminal unit, the communication method is changed from wireless communication to wired communication, So that data can be transmitted through wired communication. Thereby, it is possible to prevent the remote terminal unit from imposing excessive communication charges that may occur in the remote surveillance control system due to data transmission in the wireless communication.

In addition, according to the embodiments of the present invention, by transmitting data to the server using a communication method having a high communication quality in the remote terminal unit, it is possible to always maintain the best communication quality in the remote monitoring control system.

The present invention has been described above with reference to preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

1: field facility 2, 20: remote terminal unit
201: data receiving unit 202: data analyzing unit
203: channel management unit 204:
4: first master relay device 5: second master relay device
6: first hub or switch device 7: second hub or switch device

Claims (9)

In a remote terminal unit of a remote monitoring control system,
A data receiving unit for receiving field data from any one of a plurality of field equipments;
A data analyzer for identifying the type of the received field data by analyzing field data received by the data receiver;
Determines at least one channel among multi-channels corresponding to a communication path from the remote terminal unit to a plurality of servers belonging to different local networks via the wide area network according to the type of the field data identified by the data analysis unit A channel management unit for obtaining an address of at least one of the nodes of the determined at least one channel; And
A packet for transmitting the received field data to a server corresponding to a final destination of the received field data among the plurality of servers through the determined channel, based on the address of the at least one node obtained by the channel management section And transmitting the generated packet through the determined channel,
Wherein the channel management unit refers to a channel table in which addresses of nodes for connecting to the respective local networks via the wide area network and addresses of any one of the plurality of servers are mapped by a plurality of data types, Determining at least one channel of the multi-channels according to the type of the field data, and obtaining an address of at least one of the nodes of the determined at least one channel. delete The method according to claim 1,
Wherein the address of a node for connection to each local network is an address of a hub or a switch of each regional network or an address of a VPN server of each regional network. The method of claim 3,
An IP address of a hub or a switch of a local network to which a first server among the plurality of servers included in the first channel mapped to the first data type belongs and the TCP port number of the first server are recorded in the channel table , The IP address of the VPN server of the virtual private network to which the second server belongs in the plurality of servers included in the second channel mapped to the second data type and the private IP address of the second server are recorded Remote terminal unit. The method according to claim 1,
The communication unit
A packet generation module for generating the packet;
A wired communication module for transmitting the generated packet to the wide area network by wire, and transmitting the generated packet through the determined channel;
A wireless communication module for wirelessly transmitting the generated packet to the wide area network to transmit the generated packet through the determined channel;
A switching module for switching a communication mode of the remote terminal unit between the wired communication module and the wireless communication module; And
And a switching control module for controlling switching of the communication mode of the switching module. 6. The method of claim 5,
Wherein the switching control module switches the communication mode of the remote terminal unit from wired communication by the wired communication module to wireless communication by the wireless communication module when wired communication by the wired communication module is disabled, And controls the switching module to switch the communication mode of the remote terminal unit from the wireless communication by the wireless communication module to the wired communication by the wired communication module when the wireless communication by the module is impossible. unit. The method according to claim 6,
Wherein the switching control module controls the switching module to switch the communication mode of the remote terminal unit to the wired communication when both the wired communication and the wireless communication are normal. The method according to claim 6,
Wherein the switching control module controls the switching module to switch the communication method to a communication method of higher communication quality during the wired communication and the wireless communication when both the inter-wired communication and the wireless communication are normal. Terminal unit. A method for classifying and transmitting data in a remote monitoring control system using multi-channels,
Receiving field data from any one of a plurality of field facilities at a remote terminal unit of a remote monitoring control system;
Identifying the type of field data by analyzing the field data received by the remote terminal unit;
Determining at least one channel among a plurality of channels corresponding to a communication path from the remote terminal unit to a plurality of servers belonging to different local networks via the wide area network according to the type of the identified field data;
Obtaining an address of at least one of the nodes of the determined at least one channel;
Generating a packet for transmitting the received field data to a server corresponding to a final destination of the received field data among the plurality of servers through the determined channel based on the obtained address of the at least one node; And
And transmitting the generated packet through the determined channel,
Wherein the step of determining the at least one channel comprises the steps of: determining an address of a node connecting to each of the regional networks via the wide area network and a channel table in which addresses of any one of the plurality of servers are mapped by a plurality of data types, And determining at least one channel among the multi-channels according to the identified type of the field data. The method of claim 1,

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