• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.7
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• pp.1628-1634
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• 2011

With the advancement of ubiquitous computing technology, u-Healthcare (i.e. ubiquitous health care), is regarded as a key application for information society, which provides health management service at anytime in anywhere. To implement U-Healthcare system, it is essential to monitor stable biological information in daily life. In this paper, we proposed a small size, light weight, patch type real time temperature monitoring system based on wireless sensor network (WSN) technology to monitor patients' body temperature without any inconvenience of activity.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.1
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• pp.99-106
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• 2011

The emerging of ubiquitous computing and healthcare technologies provides us a strong platform to build sustainable healthcare applications especially those that require real-time information related to personal healthcare regardless of place. We realize that system stability, reliability and data protection are also important requirements for u-healthcare services. Therefore, in this paper, we designed a u-healthcare system which can be attached to the patient's body to measure vital signals, enhanced with USN secure sensor module. Our proposed u-healthcare system is using wireless sensor modules embedded with NLM-128 algorithm. In addition, PS-LFSR technique is applied to the NLM-128 algorithm to enable faster and more efficient computation. We included some performance statistical results in term of CPU cycles spent on NLM-128 algorithm with and without the PS-LFSR optimization for performance evaluation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.429-432
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• 2008

의료서비스 분야에서 유비궈터스 IT 기술과 헬스케어 기술을 접목함으로써 일상생활 중 지속적으로 건강상태를 모니터링하여 항상 건강한 상태의 유지가 가능하도록 하는 유비쿼터스 헬스케어기술이 급부상하고 있다. 본 연구에서는 유비쿼터스 헬스케어와 관련하여 일상생활 중 활동 상태에 따른 가속도 변화를 측정하여 활동 상태를 판단하고 활동량을 정량화하기 위한 지표를 개발하고자 하였다. 먼저 활동상태에 따른 가속도 정보를 측정하기 위해 단일침의 3축가속도 센서를 사용하였으며, 아날로그 가속도신호를 디지털로 변환하고 데이터의 무선전송을 위해 무선센서네트워크 기술을 적용한 센서노드를 활용하였다. 그리고 무선으로 전송된 가속도 신호를 PC또는 휴대형 단말기에서 모니터링하기 위해 모니터링 프로그램을 구현하였다. 계측된 가속도 신호로부터 활동상태의 분류 및 활동량의 정량화를 위한 방법을 제시하고 그 타당성을 평가하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10a
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• pp.43-47
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• 2006

개인의 삶의 질과 관련되어 건강과 가장 밀접한 관계가 있는 헬스케어 서비스 분야에서 유비쿼터스 비즈니스 모델의 개발이 활발히 이루어지고 있다. 최근 서구화된 식생활과 고령화로 암, 당뇨, 고혈압 등 만성 질환과 노인성 질환이 우리나라에서도 증가하고 있다. 단순히 혈액 중의 당이 높은 것만으로는 즉각적인 증상을 보이지 않는다. 하지만 당뇨병으로 인한 심각한 합병증이 발생할 수 있으므로 당뇨병의 치료 및 예방이 중요하다. 따라서 본 논문에서는 유비쿼터스의 핵심 기술 중 하나인 RFID를 이용하여 당뇨병 환자들의 혈당 및 혈압을 모니터링 하고 식사, 운동, 인슐린 등을 조절하는 헬스케어 서비스 시스템을 구현한다

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.6
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• pp.1256-1264
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• 2009

When unapproved users access to healthcare system and use medical information for other malicious purposes, it could severely threaten important information related to patients' life, because in ubiquitous environment healthcare service makes patient's various examination results, medical records or most information of a patient into data. Therefore, to solve these problems, we design RBAC(Role Based Access Control) for U-healthcare that can access control with location, time and context-awareness information like status information of user and protect patient's privacy. With implementation of the proposed model, we verify effectiveness of the access control model for healthcare in ubiquitous environment.

• Journal of the Korea Society of Computer and Information
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• v.11 no.6 s.44
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• pp.143-150
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• 2006

In this paper, we have implemented a ubiquitous healthcare system that can measure and check the blood pressure of human in anytime and anywhere. The implemented prototype are composed of blood pressure measurement terminal, data gathering base node, and medial information server. The implemented node constructs a sensor network using the Zigbee protocol and is ported the TinyOS. The data gathering base node is linux-based node that can transfer a sensed medial data through wireless LAN. And, the medical information server stores the processed medical data and can promptly notify the urgent status to the connected medical team. Through experiment, we confirmed the possibility of ubiquitous healthcare system based on sensor network using the Zigbee.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2003.05a
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• pp.178-182
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• 2003

New space concept is gaining attention by the change of information and digital technology. It is called a concept of ubiquitous space which is united physical space and digital space. A united into a new space which is called ubiquitous space. It is an emerging concept of new era which is already applied in some part of our daily life the advanced. The advanced technology can help people to realize ubiquitous space including u-health care. Through analysis of characteristics of u-health care space, I am going to suggest new concept of ubiquitous space which is called u-space. It can make change of conventional health care space to vitalized new space and help people's life to be affluent.

• Information and Communications Magazine
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• v.27 no.9
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• pp.15-22
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• 2010

세계 최고로 예상되는 급속한 인구구조의 고령화로 향후 우리나라는 보건, 의료, 복지 등에서 심각한 사회 문제에 직면할 것으로 예상되고, 고령화 사회로 인한 만성질환 증가는 의료비 증가로 이어져 국가 재정에 대한 부담으로 작용할 것이다. 정보통신기술을 이용하여 시간과 공간에 구애 받지 않고 언제 어디서나 건강과 생활을 관리하여 건강한 삶을 유지시키는 새로운 형태의 서비스인 유헬스(ubiquitous-Health)가 주목을 받고 있다. 일반인, 고령자, 만성질환자를 대상으로 하는 유헬스용 개인 건강 기기의 개발은 기존의 제품에서 네트워크와 연동이 되는 제품으로 보급되고 있으나, 데이터 상호 운용성이 고려되지 않은 제품이 주류를 이루고 있어 향후 진정한 유비쿼터스 개념의 건강관리를 위한 서비스를 실현하는데 문제가 될 것으로 예상되고 있다. 유헬스 기술이 표준화 되면, 생체정보 데이터의 취합 및 전송, 분석 및 피드백이 표준적인 방법으로 운용이 될 수 있으므로, 개인 건강 기기들과, 이들을 처리하는 유헬스 서비스간의 상호 운용성이 보장이 된다. 본 고에서는 최근 유헬스 분야에서 가장 활발한 표준화가 진행중인 IEEE 11073 PHD 표준화 동향에 대해서 살펴보고, 본 연구원에서 개발한 국제 표준기반 유헬스 플랫폼에 대한 소개를 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.10a
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• pp.921-924
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• 2007

In this paper, we have implemented a ubiquitous healthcare system that can measure and check human's health in anytime and anywhere. The implemented prototype are composed of both front-end and back-end. The front-end have several groups: environment sensor group such as temperature, humidity, photo, voice sensor, health sensor group such as blood pressure, heart beat, electrocardiogram, spo2 sensor, gateway for wired/wireless communication, and RFlD reader to identify personal. The back-end has a serial forwarder to propagate measurment results, monitor program, and medical information server. The implemented sensor node constructs a sensor network using the Zigbee protocol and is ported the TinyOS. The data gathering base node is linux-based terminal that can transfer a sensed medial data through wireless LAN. And, the medical information server stores the processed medical data and can promptly notify the urgent status to the connected medical team. Through our experiments, we've confirmed the possibility of ubiquitous healthcare system based on sensor network using the Zigbee.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.293-297
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• 2009

This paper describes a real-time reliable measurement and analysis system for ubiquitous healthcare based on IEEE802.15.4 standard. In order to obtain and monitor physiological body signals continuously, wearable pulse oximeter is designed in wrist that could used to measure oxygen saturation of a patient unobtrusively. The measured data was transferred to a central PC or server by using wireless sensor nodes via a wireless sensor network for storage and analysis purposes. LabVIEW server program was designed to monitor and process the measured photoplethysmogram(PPG) to accelerated plethysmogram(APG) by appling second order derivatives in server PC. These experimental results demonstrate that APG can precisely describe the features of an individual's PPG and be used as estimation of vascular elasticity for blood circulation.