• Journal of Korea Multimedia Society
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• v.19 no.8
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• pp.1479-1486
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• 2016

According to the advancement of display devices, the multi-screen contents display environment is growing to be accepted for the display exhibition area. The objectives of this research are to find communications technology and to design an editor interface of contents delivery system for the larger and adaptive multi-display workspaces. The proposed system can find existence of display devices and get information without any additional tools like marker, and can recognize device layout with only web-cam and image processing technology. The multi-display contents delivery system is composed of devices with three roles; display device, editor device, and fixed server. The editor device which has the role of main control uses UPnP technology to find existence and receive information of display devices. extract appointed color in captured picture using a tracking library to recognize the physical layout of display devices. After the device information and physical layout of display devices are connected, the content delivery system allows the display contents to be sent to the corresponding display devices through WebSocket technology. Also the experimental results show the possibility of our device connection and layout recognition techniques can be utilized for the large spaced and adaptive multi-display applications.

• Telecommunications review
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• v.24 no.5
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• pp.677-691
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• 2014

Connectivity is becoming more important keywords recently. For example, many devices are going to be connected to the internet. It is usually called as the IoT(internet of things). Many IoT devices can be evolved as a part of giant system of the world wide web. It is a great opportunity for us, because many new services can have emerged through this paradigm. In this paper, we propose a device virtualization framework for smart home service. The proposed framework connects the many home appliances devices and the internet using a dynamic protocol conversion. After our protocol conversion for device virtualization, our framework provides a RESTful API to access the resources of device through the internet. Therefore, the proposed framework can provide a variety of services, so it also can be developed into the ecosystem for smart home service. The current framework version only supports UPnP enabled devices of the home, but it can easily be extended to many other home middleware solutions. To verify the feasibility of the framework, we have implemented several service scenarios.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.541-543
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• 2004

Jini, UPnP, HAVI와 같은 홈 네트워크에 필요한 미들웨어 기술들을 데스크 탑 환경뿐만 아니라 모바일 환경에서도 동일한 서비스를 이용하고자 하는 사용자들의 요구가 증가하고 있다. 이 중 Jini 접속기술을 적용한 디바이스는 응용 서비스와 직접 의사소통을 할 수 있고, 서비스 이용에 필요한 설정의 번거로움 없이 편리하게 이용할 수 있다. 그러나 Jini 접속기술은 데스크 탑 환경을 중심으로 설계되어 있으므로 휴대폰과 PDA와 같은 모바일 디바이스에서 Jini 접속기술을 사용하기에는 많은 제약이 따른다. 본 논문에서는 이러한 점을 고려하여 Jini 접속기술을 직접 적용하기 어려운 소형 컴퓨팅 디바이스에 적합하도록 기존 Java 실행 환경의 클래스들을 이용하여, 그 응용 모델로써 모바일 디바이스를 위한 Mail Service와 Print Service 시스템을 설계 및 구현한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.191-192
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• 2009

현재 홈 네트워크 미들웨어로서 UPnP, KONNEX, ECHONET 등 여러 미들웨어들이 존재하고 있다. 홈 네트워크가 진화함에 따라 다양한 새로운 미들웨어들은 계속해서 등장하게 될 것이다. 본 논문은 상이한 홈 네트워크 미들웨어 상호 연동을 위한 통합 구조 방식에 대해 고찰하고, 상이한 홈 네트워크 미들웨어들을 통합하고 정보 가전기기들을 제어 및 연동하여, 홈 네트워크 미들웨어들의 유동적인 특성을 반영할 수 있는 상이한 미들웨어상에 있는 디바이스간 상호 동작을 지원하는 범용 미들웨어 브릿지를 통한 정보가전기기의 상호 호환 방안에 관하여 설명한다.

• Journal of KIISE:Computing Practices and Letters
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• v.14 no.9
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• pp.916-920
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• 2008

The personal workspace consists of user- specified computing environment such as user profile, applications and their configurations, and user data. Mobile computing devices (i.e., cellular phones, PDAs, laptop computers, and Ultra Mobile PC) are getting smaller and lighter to provide personal work-space ubiquitously. However, various personal work-space mobility solutions (c.f. VMWare Pocket ACE[1], Mojopac[2], u-PC[3], etc.) are appeared with the advance of virtualization technology and portable storage technology. The personal workspace can be loaded at public PC using above solutions. Especially, we proposed a framework called ubiquitous personal computing environment (u-PC) that supports mobility of personal workspace based on wireless iSCSI network storage in our previous work. However, previous u-PC could support limited applications, because it uses IRP (I/O Request Packet) forwarding technique at filter driver level on Windows operating system. In this paper, we implement OS-level virtualization technology using system call hooking on Windows operating system. It supports personal workspace mobility and covers previous u-PC limitation. Also, it overcomes personal workspace loading overhead that is limitation of other solutions (i.e., VMWare Pocket ACE, Mojopac, etc). We implement a prototype consisting of Windows XP-based host PC and Linux-based mobile device connected via WiNET protocol of UWB. We leverage several use~case models of our framework for proving its usability.