• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.88-90
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• 2001

인터넷 정보가전이란 유.무선 정보통신망에 연결되어 데이터 송.수신이 가능한 디지털 TV, 인터넷 냉장고 DVD 디지털 비디오 등과 같은 차세대 가전제품을 말하며, 휴대 정보 단말기로 원격 제어하는 홈 시큐리티 기능뿐만 아니라 초고속 인터넷과 연결되어 영화, 음악, 부가정보 등을 전송 받을 수 있어 향후 정보화 사회의 핵심분야로 부각되고 있다. 본 논문에서는 iRTOS$^{TM}$가 인터넷 정보 가전에 응용될 수 있도록 TCP/IP 네트워크 부분을 설계하고 이를 구현한 내용에 대해 기술한다.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2004.04a
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• pp.532-535
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• 2004

인터넷의 보급과 프로세서를 장착한 가전기기의 등장으로 홈 네트워크에 대한 요구와 관심이 증대되고 있다. 홈 네트워크는 사람이 좀더 편안한 상태로 생활할 수 있도록 가정환경을 제어하는 서비스이다. 다양한 서비스를 제공하는 여러 가지 플랫폼의 가전기기로 홈 네트워크를 구성하기 위해서는 미들웨어라는 것이 필요하다. 미들웨어는 다양한 가전기기를 사용자가 제어하기 위한 인터페이스를 구성한다 본 논문에서는 UPnP 미들웨어를 사용한 홈 네트워크 구성을 제안한다.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2504-2506
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• 2004

상용화된 프로토콜인 TCP/IP에 기반한 원격제어시스템을 구현하였다. 본 논문은 서보시스템의 제어 파라메터 설정에서부터 통신 프로토콜 설계에 이르기까지 시스템 구성과 이를 구현하기 위한 방법을 소개하기 위해 작성되었다. 연구결과의 실험장치를 통해 그 성능을 평가하였으며 시간지연, 신호데이터의 정확성 및 사용의 편리성 등 모든 측면에서 괄목할만한 실험결과를 기록하였다. 본 논문의 성과는 유사한 서보시스템의 응용과 활용에 기여할 것으로 본다.

• Proceedings of the IEEK Conference
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• 2002.06e
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• pp.165-168
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• 2002

This paper has been studied about the real time monitoring system development using TCP/IP ethernet and RS-422 serial communication link in general communication methods that rocket fire control agents could be monitoring about real time Rocket fire event procedures and be managing total rocket fire courses. Also, this paper has been studied the HMI(Human Machine Interface) control program and algorithm that guarantee confidential control for the Fire Display System.

• Proceedings of the KSME Conference
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• 2003.11a
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• pp.1596-1601
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• 2003

As the internet communication is prevalent in recent years, it becomes quite possible to monitor and control some mechanical plants from the remote place through the TCP/IP communication. Such a concept is expected to be applied to many industrial systems for easy maintenance and trouble shooting as well as various kinds of expensive test equipments for sharing. In this research, remote data monitoring and speed control for a DC-motor is implemented and tested through TCP/IP communication with embedded micro-controllers. It showed the possibility of reliable remote control system design utilizing the internet communication.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.8
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• pp.1434-1440
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• 2008

Performance of TCP/IP is studied on the wireless network using flow control and congestion control mechanism based on transmission rate. We discuss the elimination or the reduction of various phenomena of burst by flow controlling on transmission rate and verify that there are TCP ACK compression promblems on the queue by burst reaction while executing transmission rate controlled channels. Analyzing periodic burst reaction on the queue of source IP, the maximum value of queue is expected, which represents the applible expectation of throughput reduce and shows the improvement of performance by the reduce of throughput due to hi-directional traffic.

• Nuclear Engineering and Technology
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• v.54 no.11
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• pp.3975-3984
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• 2022

Distributed control system architecture is adopted for I&C systems of Prototype Fast Breeder Reactor, where the geographically distributed control systems are connected to centralized servers & display stations via switched Ethernet networks. TCP/IP communication plays a significant role in the successful operations of this architecture. The communication tasks at control nodes are taken care by TCP/IP offload modules; local area switched network is realized using layer-2/3 switches, which are finally connected to network interfaces of centralized servers & display stations. Safety, security, reliability, and fault tolerance of control systems used for safety-related applications of nuclear power plants is ensured by indigenous design and qualification as per guidelines laid down by regulatory authorities. In the case of commercially available components, appropriate suitability analysis is required for getting the operation clearances from regulatory authorities. This paper details the proposed approach for the suitability analysis of TCP/IP communication nodes, including control systems at the field, network switches, and servers/display stations. Development of test platform using commercially available tools and diagnostics software engineered for control nodes/display stations are described. Each TCP link behavior with impaired packets and multiple traffic loads is described, followed by benchmarking of the network switch's routing characteristics and security features.

• 제어로봇시스템학회:학술대회논문집
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• 2004.08a
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• pp.350-353
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• 2004

The increasing use of Ethernet-TCP/IP network in industry has led to the growing interest in its reliability in real-time applications such as automated manufacturing systems and process control systems. However, stochastic behavior of its medium access scheme makes it inadequate for time-critical applications. In order to guarantee hard real-time communication service in Ethernet-TCP/IP network, we proposed an algorithm running over TCP/IP protocol stack without modification of protocols. In this paper, we consider communication services guaranteeing deadlines of periodic real-time messages over MAC protocols that have unbounded medium access time. We propose a centralized token scheduling scheme for multiple access networks. The token is used to allow a station to transmit its message during the time amount that is appended to the token. The real-time performance of the proposed algorithm has been described.

• Proceedings of the KIEE Conference
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• 2001.05a
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• pp.241-244
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• 2001

TCP/IP는 internet의 표준 통신규약으로 오랜 기간동안 많은 응용 프로그램의 기본 프로토콜로 사용되고 있으며, 다양한 통신 환경에서도 상당히 안정적인 동작을 하도록 고안된 방식이다. 그러나 데이터 전송의 안정성에 비중을 두어 고안된 방식으로 전력시스템 등의 산업용 기기 제어와 같은 실시간 특성이 요구되는 응용에는 다소 부적합한 면이 없지 않다. 따라서 본 논문에서는 인터넷을 통한 원격 제어가 가능하도록 TCP/IP를 기반으로 하되, 실시간 제어를 고려한 응용계층에서 동작하는 데이터 전송 규약을 제안한다.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2386-2388
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• 2004

Recently, rapid process of network technology has an effect on the field of control engineering. And it gives effect to network control system(NCS) research that grafts existing control system and network has been studied. According to one-chip development of TCP/IP that is the most useful in LAN server for hardware, it can usefully and conveniently apply to network control system before. This paper construct network control system that can work close-loop control takes advantage of Ethernet that is the most for general data transmission network. Here, protocol uses for data transmission makes use for TCP/IP. This work the basic data transmitter-receive experiment to take advantage of network node was produced. And then, DC-motor can be control plant. Finally, I will prove to build speed control system of multiple DC-motor through Ethernet.