• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.947-950
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• 2006

최근 들어 언제 어디서나 컴퓨팅이 가능한 유비쿼터스 컴퓨팅(Ubiquitous Computing) 사회가 되면서 개인의 컴퓨팅 환경 의존도가 증가되었고, 따라서 사이버공격으로 인한 개인생활의 위협도 증가할 수밖에 없게 되었다. 더욱이 향후에는 원격진료와 같이 개인의 생명과 직결된 유비쿼터스 서비스가 활성화될 것이므로 사이버공격으로 인해 재산뿐 아니라 생명까지 위험에 처하는 경우가 늘어나게 될 것이다. 이로 인해 유비쿼터스 환경에 적합한 홈네트워크 보안(Home Network Secutity)의 중요성이 부각되게 되었다. 본 논문에서는 안전한 U-홈네트워크(Ubiquitous-Home Network) 구축에 필요한 기술들을 유 무선 기준으로 구분하고, U-홈네트워크 환경에서 발생할 수 있는 다양한 침해유형을 분석하여, 이를 막아낼 수 있는 대응방안을 수립하고, 안전한 U-홈네트워크 구축을 위해 필요한 기존의 보안요구사항들을 살펴본 후에 U-홈네트워크에 적합한 추가적 보안사항을 제안하고자 한다.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.2097_2098
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• 2009

'Ubiquitous' based on progressive development of IT technology is a new paradigm of the 21th century. In terms of rapid social and technological change, the architectural environment has been changed by computer networking system. According to the condition of the IT business, interior architectural space has been needed to consider applying IT technology for intelligent living environment. To develop the most appropriate architectural interior space applied by home network system, designers need to understand products of the home network system comprised by technical bases and classification of the system. This research is for introducing the information of the recent home network system, products and possible application of ubiquitous system for the future interior architectural space.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.573-578
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• 2008

Recently, we should control various devices such as TV, audio, DVD player, video player, and set-top box simultaneously to manipulate home theater system. To execute the function the user want in this situation, user should know functions and positions of the buttons in several remote controllers. Normally, people feel difficult due to these realistic problems. Besides, the number of the devices that we can control shall increase, and people will confuse more if the ubiquitous home environment is realized. Therefore, user adaptive interface that provides the summarized functions is required. Moreover there can be a lot of mobile and stationary controller devices in ubiquitous computing environment, so user interface should be adaptive in selecting the functions that user wants and in adjusting the features of UI to fit in specific controller. To implement the user and controller adaptive interface, we modeled the ubiquitous home environment and used modeled context and device information. We have used Bayesian network to get the degree of necessity in each situation. Behavior selection network uses predicted user situation and the degree of necessity, and it selects necessary functions in current situation. Selected functions are used to construct adaptive interface for each controller using presentation template. For experiments, we have implemented ubiquitous home environment and generated controller usage log in this environment. We have confirmed the BN predicted user requirements effectively as evaluating the inferred results of controller necessity based on generated scenario. Finally, comparing the adaptive home UI with the fixed one to 14 subjects, we confirmed that the generated adaptive UI was more useful for general tasks than fixed UI.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.2
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• pp.303-306
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• 2008

In this paper, we propose a home-networking service using mobile phone and ZigBee module. Recently, ZigBee is widely used for various applications due to its characteristics. Especially, it is generally adopted for home network services. We propose a new home network service model using mobile phones. In the proposed architecture, the mobile phones are connected to conventional home network appliances using ZigBee dongle. Also, several servers are implemented for service management. We implement the whole components of the proposed architecture and show the validity of the proposed method. With the proposed service structure, it is expected to provide various ubiquitous services for the user.

• Journal of Korea Society of Industrial Information Systems
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• v.11 no.5
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• pp.11-17
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• 2006

Recently, IT industry by digital technique is improved gradually. Therefore many electronic appliance became the digital, and this is magnified gradually. The development of embedded home automation system combined embedded and internet technique is taking many interest. Specially in the times of the ubiquitous, excellent economically home automation system is preferred even in general family. Therefore, in this paper, we escape from monotonic control of home automation and draw a plan intelligent home automation to be developed.

• Journal of information and communication convergence engineering
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• v.5 no.1
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• pp.7-11
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• 2007

The aim of this paper is to design and implement a new ECG signal monitoring and analysis method for the home care of elderly persons or patients, using wireless sensor network (WSN) technology. The wireless technology for home-care purpose gives new possibilities for monitoring of vital parameter with wearable biomedical sensors and will give the patient freedom to be mobile and still be under continuously monitoring. Developed platform for portable real-time analysis of ECG signals can be used as an advanced diagnosis and alarming system. The ECG features are used to detect life-threatening arrhythmias, with an emphasis on the software for analyzing the P-wave, QRS complex, and T-wave in ECG signals at server after receiving data from base station. Based on abnormal ECG activity, the server transfer diagnostic results and alarm conditions to a doctor's PDA. Doctor can diagnose the patients who have survived from arrhythmia diseases.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.8
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• pp.1519-1525
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• 2006

This paper proposes the U-healtcare middleware that is based on mininumCORBA. Ubiquitous healthcare system is generated by combining the technologies of computer system and medical system. This makes available that the person can receive medical treatment anywhere, anytime at on-line. The Healthcare devices are connected to network system as wire or wireless internet. So, the computer system can gather the vital information from the person at the real time and transfers the information to the server system that processes the medical information. When a medical doctor makes a diagnosis they can get more information about the patient by using the information within the server. Users would like to receive more services in the ubiquitous healthcare system than the traditional medical system. And in U-healthcare system, every healthcare devices and the users have to be connected to network system and the information from them has to be integrated. U-Home Healthcare middleware I proposed in this paper will do everything that I mentioned above.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.4
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• pp.678-686
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• 2007

Ubiquitous services are high duality and differentiated services which are provided for users by recognizing the context of users and environmental conditions actively. In this case, context-aware middleware is one of the most important technologies required to implement the ubiquitous services. In this paper, we proposed a method for providing ubiquitous services in a specific user space effectively. That is, the design and implementation of intelligent home service middleware based on context awareness is discussed here. Context information from various sensors is gathered, and suitable services are inferred and provided to users by the middleware system.

• The KIPS Transactions:PartA
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• v.16A no.3
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• pp.209-216
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• 2009

The ubiquitous smart home is the home of the future that takes advantage of context information from the human and the home environment and provides an automatic home service for the human. Human location and motion are the most important contexts in the ubiquitous smart home. We present a real-time human tracker that predicts human location and motion for the ubiquitous smart home. We used four network cameras for real-time human tracking. This paper explains the real-time human tracker's architecture, and presents an algorithm with the details of two functions (prediction of human location and motion) in the real-time human tracker. The human location uses three kinds of background images (IMAGE1: empty room image, IMAGE2: image with furniture and home appliances in the home, IMAGE3: image with IMAGE2 and the human). The real-time human tracker decides whether the human is included with which furniture (or home appliance) through an analysis of three images, and predicts human motion using a support vector machine. A performance experiment of the human's location, which uses three images, took an average of 0.037 seconds. The SVM's feature of human's motion recognition is decided from pixel number by array line of the moving object. We evaluated each motion 1000 times. The average accuracy of all the motions was found to be 86.5%.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.610-612
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• 2005

Ubiquitous Computing 시대가 도래 하면서 집이나 빌딩 같은 실내 환경에서도 Ubiquitous Computing을 도입하려는 여러 연구가 진행되고 있다. 특히 Smart Home은 집 안에 여러 종류의 센서를 설치하여 센서로부터 얻는 정보를 바탕으로 사용자에게 다양한 서비스를 제공한다. 이와 같은 Smart Home을 구현하기 위해서는 사용자나 물체의 위치 정보가 매우 중요하다. 본 논문에서는 Smart Home에서 위치 정보를 지원하기 위해 초음파와 IEEE 802.15.4 기반의 센서 시스템을 제안한다. 이 시스템에서는 초음파를 사용함으로써 생기는 문제와 센서의 효율적인 에너지 관리를 위해 IEEE 802.15.4를 적용하였다. 이 시스템은 초음파 송신부를 가지고 있는 S-node 와 수신부를 가지고 있는 R-node 로 구성되어 있으며 본문에서 각각의 구조와 알고리즘에 대해 기술할 것이다.