• Journal of Information Technology Services
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• v.7 no.3
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• pp.215-237
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• 2008

As the paradigm of communications changes from technology-centered service provision to human-centric services, the future wireless communication systems is expected to be able to provide user-centric customized and optimized services. In order to cope with such paradigm shift in communications, various research activities on next generation mobile communication systems are being carried by a number of international organization and research centers to take initiative in future ubiquitous wireless communication environment. In this paper we propose a generic research and development framework consisting of four different research and development phases, a vision and strategy establishment phase, a service development phase, a service reference model creation phase and future service foresight phase. In particular, we give prospect of future ubiquitous wireless communication services covering different service areas of future life style based on our research frameworks.

• Information and Communications Magazine
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• v.22 no.7
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• pp.67-80
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• 2005

In these days, international Ubiquitous Cities are being developed in many places, and their settings, aims, designs, organizations, and functionality differ among many different kinds of solutions and systems. This paper has been based on quantitative and qualitative research, and used lots of relevant data and information. Even though Ubiquitous cities are generally conceived as local information infrastructures and as a means for enhancing democratic participation, users primarily appreciate it as a tool for communication. We also observed among others, how cyberspace reproduces the dynamics of established and outsiders, which inclines us to think that virtual public is not as open as is often claimed. However, Ubiquitous cities will always offer you more comfortable life than ever from now on.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.697-698
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• 2008

Ubiquitous Computing System is available anytime, anywhere communications and computing systems, and information sharing and mutual cooperation between computing systems. in addition, For Ubiquitous Computing System, it is need the sensor technology to detect information of users and surrounding environment. For these reason, this paper proposed CRS(Context Recognition Switch) and DOS(Dynamic and Optimal Standard) based Context-awareness system architecture.

• Journal of the Korean Society of Clothing and Textiles
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• v.31 no.5 s.164
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• pp.717-728
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• 2007

The purpose of this study is to suggest hospital clothing design which reflects ubiquitous info-communications technology as changing hospital environment in the information-oriented era of the 21st century. The methods of this study are documentary research of previous studies, observation research and deep interviews. Seoul national university hospital is selected as a target of observation for this study. Doctors, nurses, pharmacists, and patients who are the representative jobs in the hospital are interviewed from on July, 13, 2006 to on August, 1, 2006. According to observation research, the computers, OCR, and PACS are applied from registration to dosage through all courses of diagnosis. However, the most inconvenient problems to patients are the location of medical offices and confusion of reservation. Also, the needs and inconveniences of doctors, nurses, pharmacists, and patients are almost solved by using RFID technology as a result of deep interviews. They prefer wearing devices as an accessory to wearing devices as a clothing directly. In conclusion, suggested UFC design for hospital clothing with info-communications technology promotes efficiency, accuracy, convenience of work to medical personnel in changing hospital environment as the flow of the information-oriented era of the 21st century.

• Journal of the Korea Convergence Society
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• v.6 no.6
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• pp.81-86
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• 2015

The threats to privacy and security have received increasing attention as ubiquitous healthcare applications over the Internet become more prevalent, mobile and universal. In particular, we address the communication security issues of access sharing of health information resources in the ubiquitous healthcare environment. The proposed scheme resolves the sender and data authentication problem in information systems and group communications. We propose a novel key management scheme for generating and distributing cryptographic keys to constituent users to provide form of data encryption method for certain types of data concerning resource constraints for secure communications in the ubiquitous healthcare domains.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.47 no.1
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• pp.123-134
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• 2010

In this paper we propose ubiquitous virtual reality framework and its application for fostering a sustainable content ecosystem in the convergence space of virtual reality and real space. The ubiquitous virtual reality framework supports fundamental infrastructure which consists of platforms for end-users and service providers and dual space management. The platform for the service provider allows experts to generate contents related to real objects while the platform for the end-users allows to consume, share and regenerate the contents contextually augmented over real objects. The dual space management stores, visualizes and provides the contents generated and extended by them for connecting different users and service providers. The proposed framework allows users to continuously generate, share and extend the contents and thus contribute to making multimedia service environment. We also implemented and evaluated the framework consisting of a desktop authoring platform, mobile authoring platform and a dual space management server. We then introduced a promising application scenario to show how the content ecosystem is empowered by ubiquitous virtual reality framework and is realized in our life. Consequently, we are expecting that the ubiquitous virtual reality technology will play a vital role in building continuously evolving multimedia service environment for the future computing environment.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.5 s.347
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• pp.51-58
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• 2006

A variety of systems have been attempted for effective urban management. In this paper we introduce the Integrated Urban Management System (IUMS), which consists mainly of an optical line terminal (OLT), optical network terminals (ONTs) and wireless access points (APs), by combining passive optical network (PON) and radio over fiber (RoF) technologies so as to take advantage of both systems. Further, several IUMS services such as a disaster detection and prevention system (DDPS), a bus information system (BIS) and a real time location system (RTLS) we demonstrated in order to verify the employment of IUMS for the realization of a future ubiquitous city (U-city).

• Journal of Internet Computing and Services
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• v.9 no.1
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• pp.159-170
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• 2008

The ubiquitous network revolution is beginning with the onset of digital convergence, whereby computers, horne appliances, and communications and broadcast media are being unified into digital media with the founding of the information super high speed. This technical advancement is creating a new culture and a new space and accelerating society's transition to the new and unique social paradigm of a 'ubiquitous society'. In particular, studies on ubiquitous communications are well underway. Lately, the focus has been on the Bluetooth technology due to its applicability in various environments. Applying Bluetooth connectivity to new environments such as ubiquitous or sensor networks requires finding new ways of using it. Thus, the scalable Bluetooth piconet scheme with independent slave device is proposed. It follows from work by Sea et al. But extended scatternet is not considered is Kiisc05 paper. Therefore, we propose secure bridge connection scheme for scalable Bluetooth scatternet.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.188-196
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• 2006

유비퀴터스 컴퓨팅 또는 퍼베이시브 컴퓨팅 분야는 최근 많은 연구와 개발이 이루어지고 있는 반면 그 비전과 영향을 효과적으로 보여주는 응용이나 서비스가 마땅히 떠오르지 않고 있다. 막상 한 두 가지의 훌륭한 기반기술을 개발하여 확보하여도 그것을 효과적으로 보여줄 수 있는 응용이나 서비스를 개발하는 것은 또 다른 도전과제인 것이다. 본 논문은 시나리오 기반 방법론 (Scenario-Based Development: SBD)을 이용하여 유비퀴터스 컴퓨팅 환경에서 필요한 서비스와 응용을 발굴하는 방법을 제시한다. 본 논문에서 제시하는 방법에서는 개발 주최가 보유하고 있는 요소 기술들을 나열하고, 그 기술들이 갖고 있는 문제점을 파악하기 위하여 사용자 설문을 실시한다. 설문을 분석한 결과로 문제 시나리오를 작성하고, 문제 시나리오 분석을 통하여 해결 시나리오를 작성한다. 이 두 시나리오를 작성하고 분석하는데 있어서 유비퀴터스 컴퓨팅의 개념과 기술적 특성을 반영한다. 최종적으로 해결 시나리오로부터 새로운 응용 서비스를 발굴하여 프로토타입 시스템을 개발하게 된다. 마지막으로 제시된 방법론을 이용하여 개발된 OSGi 기반의 스마트 홈 방범 시스템, 상황인지 방송 컨텐츠 제공 시스템, 그리고 개인 안전 감시 시스템, 이렇게 세 가지 시스템을 간단하게 소개한다.

• Journal of the Korea Society of Computer and Information
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• v.10 no.5 s.37
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• pp.115-122
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• 2005

W These days, Ubiquitous is coming a more popular tool in mass communications and in advanced countries ubiquitous computing is commercialized. In Korea, we have studied the business models of the ubiquitous computing generation as well. Ubiquitous computing is the environment in which humans and computers coexist and properly work together. I would like to present a service infrastructure for a more efficient context-awareness than computing home networking system in this monograph. In the mean time, they have focused the context-awareness system on identifying users in the designated space and recognition. But I would like to focus on the middleware system structure for more efficient recognition.