• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.6
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• pp.1045-1054
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• 2020

In this paper, we designed a TCP/IP based ring buffer system that can stably transfer bulk data streams in the unstable network environments. In the scheme we proposed, The observation data stream generated and output by each radio observatory's backend system as a UDP frame is stored as a UDP packet in a large capacity ring buffer via a socket buffer in the client system. Thereafter, for stable transmission to the remote destination, the packets are processed in TCP and transmitted to the socket buffer of server system in the correlation center, which packets are stored in a large capacity ring buffer if there is no problem with the packets. In case of errors such as loss, duplication, and out of order delivery, the packets are retransmitted through TCP flow control, and we guaranteed that the reliability of data arriving at the correlation center. When congestion avoidance occurs due to network performance instability, we also suggest that performance degradation can be minimized by applying parallel streams.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.10a
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• pp.129-132
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• 2003

In this paper, which sees the Strong-ARM SA1110 it used the main CPU and RTP in VoIP system. It will be able to apply the information communication field it embodied. It used the Tynux_box2 with the hardware side and it composed a VOIP system. And it used the RTP which is a real-time protocol in software control portion. The development environment of the paper that used the Target board and a Linux PC for connection used the RS-232C, USB connection, Ethernet LAN. The VoIP the environment for a communication used the wave file in the substitution which changes analog signal with the digital signal. And For the communication of the both sides it used the socket. This paper explained the fact that against a general technique from the operation of VoIP system. Using the Embedded linux development board which explained an operational process of the RTP protocol.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.904-906
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• 2016

In this paper, advertising and public relations services to provide kincet to implement a control system using face recognition and media. Traditionally, this unilateral system for delivering advertisements to consumers, is currently directed interactive ads. In other words, interactive advertising service that offers bi-directional communication. In the proposed system, the kincet using face recognition, to recognize faces with eyes, mouth, jaws and eyebrows. Presently used kinect version is the face of instability in the recognition and accurately is difficult to separate the three parts of the jaw, eyes, eyebrows only leverage. the classification has an easy immoyangProvide control services by separating the media, Hwanam-myeon, laughing. Also, consumers understand the expression of the control of the media and using picture for advertising to consumers through the transfer on both had indelibly imprinted by advertising.Effective are expected to appear.

• Proceedings of the Korean Society of Computer Information Conference
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• 2009.01a
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• pp.85-88
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• 2009

본문에서는 계층적 근무 환경에서 계급 간 보안이 유지되어야할 software application들의 효율적인 접근을 제공하는 관리 시스템을 개발하였다. package화된 software를 DB화하여 소켓통신을 이용하여 client에서 원터치로 원하는 Application이 간편하게 자동으로 설치, 삭제되도록 설계하였다. 이로써 관리자는 효율적인 테스트환경 제공과 테스트중인 프로그램의 유출방지를 기대할 수 있다. 이 프로그램은 사용법이 간단하여 다양한 연령층이 다양한 분야에서 응용이 가능하도록 설계되었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.234-237
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• 2019

본 논문에서 구현한 자동 블라인드 제어 A.B.C는 라즈베리파이와 어플리케이션의 소켓통신을 활용한 블라인드 컨트롤 프로그램으로서 어플리케이션에서 신호를 송신하면 그에 따른 명령을 수행하여 조도값의 크기나 사용자의 목적에 따라 블라인드를 조절할 수 있도록 설계한 프로그램이다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.57-59
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• 2012

본 논문에서는 소형 임베디드 시스템을 응용하여 원격으로 가정의 에너지를 효율적으로 절약할 수 있는 시스템을 제안한다. 이를 위하여 OpenWrt기반 소형 유무선 공유기를 임베디드 시스템 개발 플랫폼으로 활용하여, DC 모터가 장착된 창문 블라인드를 날씨 변화에 따라 원격지에서 스마트폰으로 제어가 가능하게 하였다. 프로토타입 시스템 구현은 Buffalo사의 WZR-HP-G450H 유무선공유기, Arduino 사의 UNO 인터페이스 보드, DC 모터로 구성하였다. 원격제어 시스템은 iOS 기반으로 애플리케이션을 제작하였다. 전체 시스템의 동작 검증은 스마트폰과 유무선 공유기, 인터페이스 보드의 소켓통신을 통하여 DC 모터의 속도를 원격으로 조절함으로 동작을 확인하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.737-738
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• 2023

본 논문은 국내의 저출산 및 인구 감소로 인한 병역자원 감소와 부대 통합의 문제에 대응하기 위해 NFC 기술을 활용한 군 장병의 동선 파악 시스템을 제안하고 개발하였다. NFC 태그를 사용하여 군 장병의 이동경로를 실시간으로 파악할 수 있는 시스템을 구축하였으며, 아두이노 기반의 NFC 리더기와 웹 소켓, REST API를 활용하여 데이터의 전송과 처리를 수행한다. 이를 통해 안전 체크 누락 방지, 동선 관리 개선, 사고 예측 등 다양한 기능을 제공하여 군 장병의 안전과 효율적인 관리를 돕는 중요한 도구로 활용될 수 있다. 이 시스템은 제한된 환경에서도 유동인구 파악을 간편하게 하며, 번거로움과 거부감을 낮추는 효과를 가져올 것으로 기대된다.

• Journal of Advanced Marine Engineering and Technology
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• v.38 no.1
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• pp.78-85
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• 2014

The Mu-communication board supported by hybrid communication is designed with Cortex M3, which is a low power energy consumption 32-bit microcontroller. The Cortex M3 microcontroller has UART(Universal asynchronous receiver/transmitter) ports which can set appropriately using the command line interpreter (CLI) program with each port. URAT ports are used for hybrid communication modems, GPS modules, etc. When the socket type was compared with the short message service type, the socket type was proven to be better. By improving the receiving performance in the control and management system of the AtoN, data loss was minimized. During the testing of the socket and SMS, data was collected from each buoy for 12 hours every 1 minute and the receiving rate of the data was found to be more than 98.58 % and 99.42 % respectively.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.3
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• pp.517-524
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• 2018

This Paper presents the real time things control method through Web browser that has no limited by time and place. To design and realize the system that not only makes it possible to communicate with other protocols but also reinforces the advantages of each protocol, the real time communication environment, based on the WebSocket technology of HTML5 whose international standardization has recently been completed, is realized. Also, the message communication environment in the low electricity and limited communication environment is realized using MQTT(Message Queue Telemetry Transport) protocol which is in the spotlight as the optimum protocol in the IoT environment. And by designing intuitive and simple hardware and realizing the responsive web interface which is not limited by the user's contact devices, the interactive system in which the user receives real time data from the hardware and reversely the user controls the things is designed and realized.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.4
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• pp.821-827
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• 2009

Currently, with the development of web 2.0 knowledge sharing system became more and more important. In this paper, we proposed and implemented seminar assistant system using database system and knowledge sharing system on public seminar. We recorded speaker's voice and presentation files on our system and user can review past talks on our seminar review systems. Our database system is implemented using MS SQL, and Input/Output Completion Port(IOCP) socket model as our server side network module. Also we used presentation software using Direct Show with MFC and Windows Presentation Foundation(WPF). and our review system is based on WFP programmed with C# language.