• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.4
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• pp.800-807
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• 2007

Web services came true a services integration, but the XML document decreases the efficiency or the whole application program with connects frequently in relatively slow communication media like network environment embedded system or use the resource limited small-sized instrument like mobile. Thereupon, ITU-T and ISO/IEC suggested encoding standard of binary XML. In this paper, implementation, of Fast XML encoding system through introduction Fast Infoset algorithm and Fast Schema algorithm for web services increase performance. And, offered of test bed that build of Fast Web Services system through Fast XML Encoder.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2380-2382
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• 2004

In this paper, Web server is built up using PXA255, 32bit RISC processor with porting Embedded Linux and GoAhead, HTTP(Hyper Text Transfer Protocol) web server, and the system with can monitor and control the environment and condition for AICC(Automatic Intelligent Cruise Control) is realized. For sending the operation condition and change of vehicle the desired data is derived by interacting ECU(Electric Control Unit) and Embedded system and the rpm of engine is controlled by step motor connected to throttle value.

• Proceedings of the IEEK Conference
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• 2003.11a
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• pp.417-420
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• 2003

Most Embedded Web Camera Server products currently deployed on the market adopt JPEG for compression of video data continuously acquired from the cameras. However, JPEG does not efficiently compress the continuous video stream, and is not appropriate for the Internet where the transmission bandwidth is not guaranteed. In our previous work, we presented the result of designing and implementing an embedded web camera streaming server using MPEG4 codec. But the server in our previous work did not show good performance since one CPU had to both compress and process the network transmission. In this paper, we present our efforts to improve our previous result by using dual CPUs, where DSP is employed for data compression and StrongARM is used for network processing. Better performance has been observed, but it is found that still more time is needed to optimize the performance.

• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2717-2719
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• 2001

In this paper The embedded Web or Hypertext Transfer Protocol (HTTP) server allows embedded systems developers to take advantage of a network infrastructure that is already in place to enhance their designs and provide new features for their customers. It has gained acceptance as a protocol for gleaning information from a wide variety of sources and its open extensible nature makes it suitable for the full range of networked embedded systems. Many companies are already building Web browser support into smart-phones and network computers, but the other end of the connection also has great potential for many more classes of embedded system. Once fitted with an embedded Web server, a device can report its status to any client on the network and can even be reprogrammed remotely to perform new tasks.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.6
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• pp.1639-1646
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• 2008

This study designed and realized a new type of RFID middle-ware based on .NET Compact Framework platform using PXA255 embedded board and Windows CE as operating system. The proposed embedded RFID middle-ware system controls via LAN a number of RFID sensors using RS-232 as interface and was designed on the basis of components of each function necessary RFID middle-ware. Application module operating in the SOA environment analyzes the data received from the RFID sensors with the embedded RFID middle-ware and in turn performs appropriate business logic. Client module to be used by end users can use RFID information in database, by web method call of application.

• Proceedings of the KIEE Conference
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• 2003.11c
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• pp.592-595
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• 2003

In this paper, we have designed a Home Networking System using an embedded linux board. The system based on the World-Wide-Web is composed of three parts - a Server, a Client and a Simulator. The Home Networking Server is built in an embedded board using an embedded linux kernel. A web-server and Home Networking Server Seryice Demon programming with a Jaya-Language is included in the board. Clients can connect to the server board using a web-browser in the desktop computer, PDA or any other machines which include a web-browser. For this purpose, we made the client program using a Java-Applet. So, the clients who connect to the server for the control of the applications, download the class-file and execute the client-program in the web-browser. So, the clients don't need any other programs to control the applications from a remote place. The size of server board is very small (86.3$\times$74mm), which makes it very useful not only for the Home-Networking-System but also in many other fields, e.g., embedded robot control system, etc. Using an embedded board instead of a desktop computer is good for a simple network environment and it occupies only a small space to make the system.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.1
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• pp.131-138
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• 2007

Plain old Web Services came true a services integration with use the XML that will be able to define a platform-independent document format in basic document format. Hut, the XML document decreases the efficiency of the whole application program with connects frequently in relatively slow communication media like network environment, embedded system or use the resource limited small-sized instrument like mobile. In this paper, we implemented the algorism of Fast Infoset, which can convert XML into Fast XML using the Fast Inoset method and PER encoding rules in ASN.1 and constructs Test Bed. Also, it is compared with the existing pure XML message method in difference of process performance after encoding SOAP messages of XML basis when constructing web service.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10b
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• pp.544-546
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• 2004

본 논문은 웹 환경에서 QoS를 보장하면서 사용자에게 유연한 미디어 서버스와 상호작용을 제공 할 수 있는 웹 브라우저를 위한 임베디드 스트리밍 재생기 기술을 제시한다. 현재 웹 환경에서 많은 스트리밍 서비스를 하고 있지만, 재생환경이 윈도우즈나 리눅스와 같이 특정 운영체제로 제한되어, 웹 브라우저에서 미디어 재생을 하기 위한 플레이어도 윈도우 미디어 플레이어나 Mplayer와 같이 제한적인 환경에서만 동작할 수 있는 문제점을 가진다. 본 논문에서는 사용자가 윈도우즈나 리눅스 운영체제 환경의 웹 브라우저에서 스트리밍 서비스를 이용할 수 있는 재생기 기술을 제시한다 이를 위하여 본 논문에서는 실시간 미디어 서비스를 스트리밍 프로토콜의 분석과 웹 브라우저에 내장할 수 있는 미디어 재생기의 VCR 컨트롤 지원 방법을 제시한다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.937-939
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• 2005

본 논문에서는 임베디드 프로세서인 ATmega128과 W3100A 이더넷 칩을 이용하여 범용 웹 모니터링 시스템을 구현하였다. 카메라를 이용한 동영상 오디오, RS-422 통신, 디지털/아날로그 신호의 입출력 등 다양한 제어 모니터링 정보를 통합하여 범용으로 사용할 수 있고, 소형, 저가, 저전력 소모가 가능하도록 설계, 구현하였다. 클라이언트 프로그램은 Java Applet으로 개발 하여 별도의 소프트웨어 설치 없이 웹브라우저를 통하여 접속되고, 원격지의 영상 및 각종 기기들의 상태를 실시간으로 모니터링하여 GUI기반의 각종 메뉴를 사용하여 원격 시스템을 편리하게 제어 할 수 있다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2013.01a
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• pp.13-16
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• 2013

최근 Web 서비스, MP3, 동영상 재생, 무선통신 등 다양한 기능을 제공하는 스마트폰, 테블릿 PC와 같이 베터리로 동작하는 디지털 컨버젼스 기기들의 사용량이 증가되었고, 이러한 이동형 임베디드 기기들은 베터리 용량에 따라 사용시간이 제한된다. 그렇기 때문에 기기들의 평가항목 중 전력소모라는 성능지표가 대두되고 있으며, 소비전력을 낮추기 위한 저전력 기법이 전 세계적으로 연구되고 있다. 본 논문에서는 이동형 임베디드 기기에 사용 가능한 cnu_RTOS에 DPM(Dynamic Power Management)과 S3C2450에서 제공하는 DPM(Device Power Management)을 이용한 저전력 기능을 구현하여, 소비전력 감소율을 측정하였다.