• Electronics and Telecommunications Trends
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• v.8 no.4
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• pp.23-36
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• 1993

기존의 공장 자동화용 통신 프로토콜로서 MAP 이 표준화되어 널리 사용되어 오고 있으나, 이는 중소기업에서 수용하기가 적합하지 않다. 따라서 Cell 레벨의 규약인 Mini-MAP 프로토콜에 기초한 산업용 네트워크를 정의하고 이에 따라 중소기업형 공장자동화 시스템을 구성하였다. 산업용 네트워크는 호스트 컴퓨터와 주스테이션, 부스테이션 등으로 이루어지며, 여기에서는 산업용 네트워크의 마스터 역할을 하는 주스테이션의 구조와 프로토콜 운영 절차 등을 설명하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.802-804
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• 2001

현재 산업 현장에서 사용되고 있는 산업용 감시카메라는 고정채널방식에 기반한 아날로그 카메라들이 대부분이며 하나의 모니터에 종속되어 사용되는 것이 일반적이다. 이로 인해 대규모의 산업용 감시 카메라를 보유한 대규모공장의 조업에 적잖은 비능률을 초래해 왔다. 본 논문에서는 현재 산업용 감시카메라들의 운영에 관한 문제점들을 들고 이를 극복할 수 있는 대안으로 IP기반의 디지털 카메라를 이용한 산업용 감시카메라의 네트워크 구성을 제안한다.

• KIPS Transactions on Computer and Communication Systems
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• v.9 no.11
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• pp.256-264
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• 2020

Industrial Wireless Sensor Networks (IWSNs) is exploited to achieve various objectives such as improving productivity and reducing cost in the diversity of industrial application, and it has requirements such as low-delay and high reliability packet transmission. To accomplish the requirement, the network manager performs graph construction and resource allocation about network topology, and determines the transmission cycle and path of each node in advance. However, this network management scheme cannot treat mobile devices that cause continuous topology changes because graph reconstruction and resource reallocation should be performed as network topology changes. That is, despite the growing need of mobile devices in many industries, existing scheme cannot adequately respond to path failure caused by movement of mobile device and packet loss in the process of path recovery. To solve this problem, a network management scheme is required to prevent packet loss caused by mobile devices. Thus, we analyse the location and movement cycle of mobile devices over time using machine learning for predicting the mobility pattern. In the proposed scheme, the network manager could prevent the problems caused by mobile devices through performing graph construction and resource allocation for the predicted network topology based on the movement pattern. Performance evaluation results show a prediction rate of about 86% compared with actual movement pattern, and a higher packet delivery ratio and a lower resource share compared to existing scheme.

• The Journal of the Korea institute of electronic communication sciences
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• v.7 no.2
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• pp.409-415
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• 2012

Recently in industry communication, the efforts that use robot and automation system increased by cooperation with optical communication and industrial Ethernet. In this paper, in order to solve the problem that total network blocking when network fault happens and wiring problem of optical cable, which were big serious disadvantage in industrial optical network systems, we propose bi-directional optical EtherCAT communication technique based on single optical core, which applying WDM method. We describe the content for implementation of WDM bi-directional optical EtherCAT communication module and performance evaluation to verify the performance of related technology as a whole.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.381-382
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• 2013

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.5
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• pp.291-295
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• 2014

This paper presents the implementation of industrial wireless network for real-time control system and the performance evaluation on the implemented system. We propose the hybrid network architecture of wired EtherCAT and wireless 802.15.4e. For performance evaluation, we use the reference model of inverse pendulum system. Through the performance evaluation on our testbed system, it is verified that our proposed system can be applied to industrial real-time control system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.3
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• pp.153-161
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• 2020

Due to the recent development of the 4th industrial revolution, Smart Factories that organically link various technologies such as AI, IoT, Cloud, and Big Data are increasing. Based on this, in the industrial environment where the internal process is controlled automatically, high availability should be secured against the loss caused when the internal process of the Smart Factory is stopped due to the determinism and malicious attack necessary to control the device such as PLC. The research and analysis of industrial network equipment and security equipment used in various industries can improve the efficiency and usability of industrial control systems in national infrastructure and can provide important feedback to build related infrastructure. Therefore, we compared industrial network equipment and security equipment in this paper in a variety of ways and expect to be used as a roadmap for developing technologies for industrial network equipment and industrial security equipment based on the results of this paper.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2556-2558
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• 2004

반도체와 네트워크 기술의 발전은 산업분야에서의 각종 컴퓨팅 환경을 독립형 시스템에서 네트워크 시스템으로 변화시키고 있다. 본 논문에서는 임베디드 시스템 기반 산업용 계측 및 진단 시스템을 네트워크 환경하에서 보다 능동적으로 상호 작용하기 위한 미들웨어 수준의 임베디드 시스템 실행환경을 구성하고, 시스템 플랫폼으로는 자바를 사용한다. 자바 임베디드 기반 계측 및 진단 네트워크 미들웨어 시스템은 각 대상기기들의 고유작업들을 처리할 뿐만 아니라 이들 대상기기간의 계측 및 진단 정보를 서로 공유함으로써 보다 다양한 상황에 유연하게 대처하고, 효율적인 시스템 관리를 위한 능동 계측 진단 미들웨어 시스템 실행환경을 구성하고자 한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.12
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• pp.1673-1678
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• 2019

There are various networks and communication methods are used in industrial communication. Enterprises need to convert communications between industrial devices and networks for production line expansion, factory upgrades, network segmentation, and SI. This requires designers manufactured by many manufacturers to provide communication equipment for data or protocol conversion in order to connect and transmit various other mechanical devices to the network. This paper designed industrial communication gateway that can support the transformation of industrial communication protocol using multi-layered communication module. Industrial communication gateways have a structure that connects individual communication modules using RS485 communication to multiple layers. Each communication module consisted of analog and digital data card, LAN, and CAN-enabled card. The main board processor used Atmega micro-processor, and the RS485 slot was placed to have a multi-layer communication module structure. These additive layer type communication modules support analog and digital I/O functions and LAN and CAN for wide use in industrial communication control and monitoring.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2004.04a
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• pp.3-6
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• 2004

최근 반도체 물류자동화 시스템 또는 발전소, 제철소와 같은 대단위 프로세스 자동화 시스템등에서 센서 및 계측 단말기기로부터의 계측 데이터를 산업용 Ethernet/IP 또는 블루투스와 같은 상위네트워크를 통해 원격지에서 제어계측 할 수 있도록 하기 위한 필드버스 기반의 산업용 유무선 계측 시스템 기술의 연구가 활발히 진행되고 있다. 그러나 Ethernet/IP라는 산업용 프로포콜 기반이 상용화될 경우 웹 환경에서 시스템에 독립적인 Master/slave간 지능적 모니터링 시스템의 개발은 매우 필요하다. 따라서 본 논문에서는 시스템 독립적으로 Master/slave 네트워크 모니터링 소프트웨어 및 통합 운영프로그램 개발하여 실시간으로 모니터링 할 수 있는 시스템을 개발하여 사용자들이 쉽게 사용할 수 있도록 하였다. 본 논문에서 구현한 환경은 윈도우 기반의 Java를 이용하였다.