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崔京三 弘益大學校 科學技術硏究所 2004 科學技術硏究論文集 Vol.15 No.-
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 based on the LINUX kernel. The web server and Home Networking Server Service Demon programs are installed in the board using the Java-Language. Clients may connect to the server using any desktop computers, any PDAs or any other machines which include any web-browsers. For this purpose, the client service programs are composed of Java-Applets. The clients who connect to the server for the control of the applications, download the class-file automatically 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 (86.3x74mm), 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. In many fields, using an embedded board instead of a desktop computer will make the network environment very simple, since it occupies only a small space to install the system and doesn't need any maintenances.
개선된 MGCP 프로토콜을 이용한 인터넷 음성 통화 구현에 관한 연구
崔京三 弘益大學校 科學技術硏究所 2002 科學技術硏究論文集 Vol.13 No.-
In this paper, A modified MGCP call setup protocol for the voice conference in Internet is studied. This modified MGCP embodies the call setup model of a conference call, and very similar to the standard MGCP. So, this modified protocol may conference with devices where standard MGCP is installed. The only difference from the standard MGCP is that it has a GROUP concept for the conference. And the conference call setup is constructed on a GROUP base. IP multicast and RTP ( Real-time Transfer Protocol ) are used for the realization of conference call control. IP multicast is a solution of network traffic problem caused by a conference, because multicasting is a one to many communication, and RTP is a solution of reducing network delay during the voice data transmission.