KR102123211B1 - Short range wireless communication apparatus related optical communication network for advanced distribution management system - Google Patents

Abstract

Disclosed is a short-range wireless communication device in connection with an optical communication network for a distribution automation system. According to the present invention, the short-range wireless communication device in connection with the optical communication network for the distribution automation system comprises: a wired communication unit having a plurality of ports for connecting to a distribution automation system and an optical communication network; a wireless communication unit for wireless communication with other wireless communication devices; a security module for encrypted communication during wireless communication; a control unit for transmitting and receiving data for the automation of the encrypted distribution through the wired communication unit and the wireless communication unit by applying encryption of the security module to the data for distribution automation according to the master mode and the slave mode; and a display unit that displays the operating state of the control unit.

Description

Short-range wireless communication device in connection with optical communication network for distribution automation system {SHORT RANGE WIRELESS COMMUNICATION APPARATUS RELATED OPTICAL COMMUNICATION NETWORK FOR ADVANCED DISTRIBUTION MANAGEMENT SYSTEM}

The present invention relates to a short-range wireless communication device in connection with the optical communication network for the distribution automation system, and more specifically, in connection with the optical communication network for the distribution automation system, an omni-directional dual band wireless system that enhances modem authentication and security in areas where the optical communication network is unavailable It relates to a short-range wireless communication device in connection with an optical communication network for a distribution automation system that can provide a wiring automation service by communication.

In general, the distribution automation system monitors and controls the status of switchgear for distribution lines scattered at a distance using a computer installed in the central control room of the office, measures voltage and current, etc. It is a system that checks the power and performs grid operation remotely.

Conventional power distribution automation systems are designed to establish a communication network using optical, cable, wireless, TRS (Trunked Radio System), etc. as communication lines, and to remotely monitor and control automatic switchgear.

Background of the invention is disclosed in Republic of Korea Patent Publication No. 10-0910904 (2009.08.05. announcement, distribution automation system using multiple communication networks).

In this way, for the remote automatic operation of the distribution system facility in the distribution automation system, a network that enables communication between the terminal device (FRTU: Field Remote Terminal Unit) and the main device is essential. Since the power control network is designated as a major information and communication infrastructure, for security reasons, a general commercial network cannot be used, so a separate dedicated network is required. Due to this situation, most of the dedicated optical communication networks, which are wired, are mostly used in the distribution automation system (DAS) communication network, and some of the own wireless communication networks (D-TRS) are applied. In addition, a short-range wireless communication method called DWB (DAS Wireless Bridge) using a wireless LAN technology of the Industrial Scientific Medical band (ISM) band, which is a 5 GHz band, is used in a small scale in connection with an optical communication network.

However, as the DWB method uses the 5GHz frequency band, the propagation characteristics have a strong linearity, so even if the visible distance is secured at both ends of the terminal device (FRTU) at the first facility, communication obstacles caused by trees and structures are caused. There is a problem that a limit occurs to be used as a power control network communication method.

In addition, since only the directional antenna is used, as the antennas are installed to face each other accurately, the communication success rate is reduced by changing the position of the antenna structure due to natural phenomena, and the antenna size is also larger than that of the omni-directional antenna, which makes it difficult to attach poles during installation. In addition, there is a problem in that the communication method is limited and thus it is impossible to accommodate new services. In addition, there is a problem in that the security vulnerability of the power control network always exists according to the application of non-encryption (plaintext) in a short-range wireless communication section.

The present invention has been devised to improve the problems described above, and an object of the present invention according to an aspect is an omnidirectional dual enhanced modem authentication and security for an area in which an optical communication network is unavailable in connection with an optical communication network for distribution automation. It is to provide a short-range wireless communication device in connection with an optical communication network for a distribution automation system that can provide a wiring automation service through band wireless communication.

A short-range wireless communication device in connection with an optical communication network for a distribution automation system according to an aspect of the present invention includes: a wired communication unit having a plurality of ports for connecting to a distribution automation system and an optical communication network; A wireless communication unit for wireless communication with other wireless communication devices; Security module for encrypted communication during wireless communication; A control unit that transmits and receives data for the automation of the encrypted distribution through the wired communication unit and the wireless communication unit by applying encryption of a security module to the data for distribution automation according to the master mode and the slave mode; And a display unit that displays the operating state of the control unit.

In the present invention, the wired communication unit is characterized in that it comprises at least one of a serial communication unit for connecting to a terminal device constituting a distribution automation system or an optical modem of an optical communication network via serial communication, and an Ethernet communication unit for connecting via IP communication. .

In the present invention, the wireless communication unit includes: a first wireless communication unit supporting 2.4GHz Zigbee communication; And a second wireless communication unit supporting 900MHz Wi-Sun communication.

In the present invention, the maximum packet size of the user data of the first wireless communication unit is 100 bytes, and the maximum packet size of the user data of the second wireless communication unit is 2,000 bytes.

In the present invention, when the same packet data is received through the first wireless communication unit and the second wireless communication unit, the control unit receives the first received packet according to the received order.

In the present invention, the wireless communication unit is characterized in that it communicates using a LBT (Listen Before Talk) method.

In the present invention, the control unit is characterized in that it comprises a loader (Loader) that monitors the state of the application and resets the application when the application is in a deadlock state.

In the present invention, the control unit is characterized in that it performs real-time validation of the certificate from the distribution automation system to transmit and receive data with the authenticated wireless communication device.

In the present invention, the control unit is characterized in that it accommodates N wireless communication devices operating in a slave mode when operating in a master mode.

In the present invention, the control unit is characterized in that it consists of another wireless communication device and a mesh network when operating in the slave mode.

In the present invention, the control unit is characterized in that to perform hop-by-hop communication through a wireless communication unit.

The short-range wireless communication device in connection with the optical communication network for the distribution automation system according to an aspect of the present invention is wired with an omnidirectional dual-band wireless communication that enhances modem authentication and security for areas in which the optical communication network is unavailable in connection with the optical communication network for distribution automation. Since it is possible to provide an automation service, in various environments, it is possible to improve the survivability in the event of a terminal failure and improve the communication reliability, thereby resolving delays and impossibility of installing the distribution automation communication network and accepting new services.

1 is a block diagram showing a short-range wireless communication device connected to an optical communication network for a distribution automation system according to an embodiment of the present invention.
2 is an exemplary view showing an installation state of a short-range wireless communication device connected to an optical communication network for a distribution automation system according to an embodiment of the present invention.

Hereinafter, a short-range wireless communication device in connection with an optical communication network for a distribution automation system according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition of these terms should be made based on the contents throughout the specification.

1 is a block diagram illustrating a short-range wireless communication device in connection with an optical communication network for a distribution automation system according to an embodiment of the present invention, and FIG. 2 is a short-range wireless communication in connection with an optical communication network for a distribution automation system according to an embodiment of the present invention. It is an exemplary view showing the installation state of the device.

1 and 2, a short-range wireless communication device connected to an optical communication network for a distribution automation system according to an embodiment of the present invention includes a wired communication unit 10, a wireless communication unit 50, a security module 30, and a control unit 40 and a display unit 60.

The wired communication unit 10 may include a plurality of ports for connecting to a distribution automation system and an optical communication network.

Here, the wired communication unit 10 is for connecting to the terminal device 120 constituting the distribution automation system or the optical modem 110 of the optical communication network through the serial communication unit 12 and IP communication for RS-232C serial communication. It may include any one or more of the Ethernet communication unit (14).

Therefore, when operating in the master mode, the wireless communication device 100 can connect to the terminal device 120 and the optical modem 110 through the serial communication unit 12 in order to connect to the optical modem 110 of the optical communication network, When operating in the slave mode, the terminal device 120 may be connected through the serial communication unit 12.

Meanwhile, in the case of the terminal device 120 or the optical modem 110 supporting Ethernet, the Ethernet communication unit 14 may be connected.

The wireless communication unit 50 forms a wireless network by performing wireless communication with another wireless communication device 100.

Here, the wireless communication unit 50 may include a first wireless communication unit 52 supporting 2.4 GHz Zigbee communication and a second wireless communication unit 54 supporting 900 MHz Wi-Sun communication.

In addition, the wireless communication unit 50 may communicate by allocating a non-occupied band without collision with the ISM band by communicating using an LBT (Listen Before Talk) method.

On the other hand, if the packet size transmitted through the wireless communication unit 50 is segmented into a small size in order to guarantee a communication success rate, if any one of the segmented parts fails to transmit, the entire data may fail to be transmitted.

Therefore, in this embodiment, the maximum packet size of user data of the second wireless communication unit 54 supporting 900 MHz Wi-Sun communication can be defined as 100 bytes, and the first wireless communication unit 52 supporting 2.4 GHz Zigbee communication can be defined. Communication traffic can be optimized by defining the maximum packet size of user data as 2,000 bytes.

Here, the transmission speed of the first wireless communication unit 52 is 200 kbps, and the transmission rate of the second wireless communication unit 54 is 50 kbps.

In addition, when a packet is received through the wireless communication unit 52, a timeout time for distinguishing the packet from the packet is adjusted to 30 msec, so that other packets can be prevented from overlapping.

The security module 30 may include data for encryption and decryption for encrypted communication during wireless communication.

Here, as the security module 30, a security module that has been certified by the National Intelligence Service can be applied.

The control unit 40 may transmit and receive data through the wired communication unit 10 and the wireless communication unit 50 by applying encryption of the security module 30 to data for distribution automation according to the master mode and the slave mode.

Here, since the wireless communication unit 50 transmits and receives data through the first wireless communication unit 52 and the second wireless communication unit 54, the control unit 40 uses the first wireless communication unit 52 and the second wireless communication unit 54. When the same packet data is received through, the first received packet may be received according to the received order.

In addition, when transmitting and receiving data to and from the other wireless communication device 100, the control unit 40 performs real-time validation of the certificate from the distribution automation system to transmit and receive data to only the authenticated wireless communication device 100 to enhance security. .

On the other hand, the wireless communication device 100 according to the present embodiment may be composed of one master and N slaves, so that the control unit 40 operates in the master mode when the N wireless communication devices operating in the slave mode ( 100).

In addition, the wireless communication device 100 operated as a slave is composed of a mesh network, and when the controller 40 is operated in a slave mode, the wireless communication device 100 and the wireless communication unit 50 are configured as another wireless communication device 100 configured as a mesh network. By performing hop-by-hop communication, it is possible not only to enable long-distance transmission, but also to secure network reliability in the event of a failure.

Meanwhile, the control unit 40 may include a loader that monitors the state of the application and resets the application when the application is in a deadlock state, thereby compensating for the problem that the application itself cannot be reset due to death. have.

The display unit 60 may display the operation state of the control unit 40 with LEDs. For example, the reception sensitivity of the wireless communication unit 50 can be displayed, the power state can be displayed, the normal operation state, and the master mode and slave mode can be displayed.

The power supply unit 20 may supply power for driving the wireless communication device 100.

When the operation of the short-range wireless communication device in connection with the optical communication network for the distribution automation system made as described above is described, first, real-time validation of the certificate of the wireless communication device 100 is performed.

For example, when the wireless communication device 100 is operated in the master mode, the control unit 40 may request real-time validity verification of the certificate from the certificate verification server (not shown) through the optical communication network connected to the wired communication unit 10. When operating in the slave mode, the control unit 40 may request the certificate verification server to validate the certificate in real time via the wireless communication device 100 operating in the master mode through the wireless communication unit 50.

When the interoperability and reliability are secured through real-time validation of the certificate as described above, and then operated in the master mode for data transmission, the control unit 40 collects the terminal device 120 collected through the slave mode wireless communication device 100. ) Data through the first wireless communication unit 52 and the second wireless communication unit 54 to check the integrity, and then select the first received packet from the same packet based on the packet ID to decrypt data of the security module. Decrypt the data by applying.

Here, if the received packet is not encrypted or the decoding fails, the control unit 40 may discard the received packet.

Thereafter, the control unit 40 transmits the decrypted data to the distribution automation system through the wired communication unit 10 connected to the optical modem 110.

In addition, the control unit 40 also transmits the data collected from the terminal device 120 connected to the wired communication unit 10 through the optical modem 110 to the distribution automation system.

Here, the control unit 40 may store the data collected from the terminal device 120 in a buffer without parsing and transmit the data through the optical modem 110.

On the other hand, when the wireless communication device 100 according to the present embodiment is operated in a slave mode, the control unit 40 does not parse the data collected from the terminal device 120 connected to the wired communication unit 10 in a buffer. After storing, the encryption is performed based on the encryption data of the security module 30.

Thereafter, the control unit 40 transmits the independently encrypted data through the first wireless communication unit 52 and the second wireless communication unit 54 to the wireless communication device 100 operating in the master mode.

As described above, according to the short-range wireless communication device in connection with the optical communication network for the distribution automation system according to the embodiment of the present invention, the short-range wireless communication device in connection with the optical communication network for the distribution automation system is impossible to service the optical communication network in connection with the optical communication network for distribution automation. Wiring automation service can be provided with omni-directional dual-band wireless communication with enhanced modem authentication and security for the region, improving survival in case of terminal failure in various environments and improving communication reliability, delaying the deployment of distribution automation communication network and It is possible to eliminate locations where installation is not possible and to accommodate new services.

The implementation described herein can be implemented, for example, as a method or process, apparatus, software program, data stream or signal. Although discussed only in the context of a single form of implementation (eg, discussed only as a method), implementation of the features discussed may also be implemented in other forms (eg, devices or programs). The device can be implemented with suitable hardware, software and firmware. The method can be implemented in an apparatus, such as a processor, generally referring to a processing device, including, for example, a computer, microprocessor, integrated circuit, or programmable logic device. The processor also includes communication devices such as computers, cell phones, portable/personal digital assistants ("PDAs") and other devices that facilitate communication of information between end-users.

The present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art to which the art belongs can various modifications and equivalent other embodiments from this. Will understand.

Therefore, the true technical protection scope of the present invention should be defined by the claims below.

10: wired communication unit 12: serial communication unit
14: Ethernet communication unit 20: power supply unit
30: security module 40: control unit
50: wireless communication unit 52: first wireless communication unit
54: second wireless communication unit 60: display unit
100: wireless communication device 110: optical modem
120: terminal device

Claims (11)

A wired communication unit having a plurality of ports for connecting to a distribution automation system and an optical communication network;
A wireless communication unit for wireless communication with other wireless communication devices;
A security module for encrypted communication during the wireless communication;
A control unit that transmits and receives data for the automation of distribution distribution through the wired communication unit and the wireless communication unit by applying encryption of the security module to data for distribution automation according to a master mode and a slave mode; And
It includes; a display unit for displaying the operating state of the control unit,
The wireless communication unit includes: a first wireless communication unit supporting 2.4GHz Zigbee communication; And a second wireless communication unit supporting 900 MHz Wi-Sun communication.
The control unit, when the same packet data is received through the first wireless communication unit and the second wireless communication unit, receives the first packet received in the order received, the short-range wireless communication linked to the optical communication network for the distribution automation system Device.
The method of claim 1, wherein the wired communication unit, any one or more of the serial communication unit for connecting to the terminal device constituting the distribution automation system or an optical modem of the optical communication network in serial communication and an Ethernet communication unit for IP communication. A short-range wireless communication device connected to the optical communication network for a distribution automation system, characterized in that it comprises a.
delete According to claim 1, wherein the maximum packet size of the user data of the first wireless communication unit is 100 bytes, and the maximum packet size of the user data of the second wireless communication unit is 2,000 bytes. Communication device.
delete According to claim 1, wherein the wireless communication unit, LBT (Listen Before Talk) communication system for short-range wireless communication network communication network connection, characterized in that the communication.
The method of claim 1, wherein the control unit, monitoring the status of the application, the application of the deadlock (Dead Lock), the loader (Loader) for resetting the application, the optical communication network connection short-range wireless, characterized in that it comprises a loader Communication device.
The short-distance wireless communication device according to claim 1, wherein the controller transmits and receives data to and from the authenticated wireless communication device by real-time validating a certificate from the distribution automation system.
According to claim 1, wherein the control unit, operating in the master mode, operating the slave mode, N of the wireless communication device, characterized in that it accommodates the wireless communication device for short-range wireless communication network communication network.
10. The method of claim 9, The control unit, when operating in a slave mode, the other wireless communication device and the mesh network for the distribution network communication network connection short-range wireless communication device, characterized in that consisting of.
The short-range wireless communication device according to claim 1, wherein the control unit performs hop-by-hop communication through the wireless communication unit.

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