• Journal of information and communication convergence engineering
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• v.8 no.2
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• pp.219-222
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• 2010

An ubiquitous sensor network (USN) system to monitor the bio information and the emergency of the elderly in the silver town is presented. The USN system consists of the sensor node platforms based on MCU of Atmage128L and RF Chip of CC2420 satisfying IEEE 802.15.4, which includes the bios sensor module such as the electrocardiogram (ECG) sensor and the temperature sensor. Additionally, when an emergency of the elderly is occurred in the silver town, the routing algorithm suitable to find and inform the location of the elderly is proposed, and the proposed routing algorithm is applied to the USN. To collect and manage the ECG data at the PC connected to the sink node, LabView software is used. The bio information and the emergency of the elderly can also be monitored at the client PC by TCP/IP networks in the USN system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.2
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• pp.123-128
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• 2009

In ubiquitous computing environments, service discovery to search for an available service is an important issue. In this paper, we propose an efficient service discovery scheme that is combined a node id-based clustering service discovery scheme and a P2P caching-based information spreading scheme. To search quickly a service, proposed scheme store key information in neighbor's local cache and search services using it's information. We do not use a central look up server and do not rely on flooding. Through simulation, we show that the proposed scheme improves the performance of response time and network load compared to other methods.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.2
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• pp.51-56
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• 2011

Recently, it is emerging in computing industry related ubiquitous. Also U-Healthcare system develops rapidly based on this trends. It is required system of health-status information to check user's health information on real-time and wireless network environment. Consequently, in this paper propose a health-Information system based on wireless and real-time environment. It can check a tremor pulse with method of photo-plethysmography. It convert pulse state information into 2-dimension bar code in order to confirm health information using mobile and also this system provide service of pulse visual record and explanation from specialist with MMS.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.6
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• pp.1223-1228
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• 2012

The use of a mobile agent in hospital environment offers an opportunity to deliver better services for patients and staffs. Furthermore, medical errors will be reduced because M-health system helps to verify the medical process. Optimized security protocols and mechanisms are employed for the high performance and security. Finally, a challenge in the near future will be converge the integration of Ubiquitous Sensor Network (USN) with security protocols for applying the hospital environment. We proposed secure authentication and protocol with Mobile Agent for ubiquitous sensor network under healthcare system surroundings.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.35-41
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• 2010

In this paper, an Android based ubiquitous interface for controlling service robots is presented. The robot server captures the images for the front view of the robot, makes a map of the environment and its position, produces a graphic image of its pose, and then transmits them to the Android client. The Android client displays them in the LCD panel and transfers control information obtained from touched buttons to the server. In the interface environment, we implement remote moving mode, autonomous moving mode, and remote operation mode for being used for versatile operability to the robot with limited screen of the smart phone. Experimental results show the implementation of the proposed interface in Android installed on Motoroi to control a service robot, and demonstrate its feasibility.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.45 no.12
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• pp.133-138
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• 2008

A 50-60GHz continuous-wave(cw) millimeter-wave(MMW) was converted(generated) by applying optical technology for future wireless and ubiquitous communications. The optical power of 22.5mW was injected into optical waveguide in this experiment. The generated MMW signals were radiated in a millimeter waveguide and detected through a millimeter detector on the inside of a millimeter waveguide in this experiment. The spectral linewidth of the MMW signals was less than 1 kHz. The power fluctuation of the MMW was less than 1.2 dBm over 50-60 GHz range.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2006.11a
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• pp.57-60
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• 2006

최근 유비쿼터스 헬스케어 서비스를 이용한 시간과 공간의 제약 없이 각종 의료서비스와 건강관리를 제공받는 유비쿼터스 헬스케어에 대한 관심이 증대되고 있다. 유비쿼터스 헬스케어 산업은 특성상 단일 제품이나 서비스로만 존재하지 않고, 의료정보, 장비, 소프트웨어, 네트워크, 전자상거래 등의 보건 의료를 구성하는 모든 산업이 IT에 기반 하여 집약된 새로운 산업분야이다. 이러한 산업 특성상 유비쿼터스 헬스케어 서비스는 다양한 기술들을 이용하기 때문에 이들을 서비스의 개발, 이용 단계에서 통합된 환경을 제공받아 이용하는 것이 효과적이다. 본 논문에서는 유비쿼터스 헬스케어 서비스 이용을 위한 서비스 시스템 아키텍쳐를 제안하고, 제안된 시스템에서 이용할 수 있는 서비스들을 개발하기 위한 유비쿼터스 헬스케어 서비스 개발 Framework을 설계한다. 제안된 시스템 아키텍쳐와 개발 Framework을 이용하면 헬스케어 서비스 이용자에게 적절한 인터페이스의 제공과 질환에 대한 추적 관찰, 증상의 판단, 진료 지원, 건강관리, 외부 기관과의 정보 교환 등의 서비스를 개발할 수 있다.

• Journal of information and communication convergence engineering
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• v.5 no.2
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• pp.136-139
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• 2007

In this paper we will discuss a general idea about an information system which provides information a user really needs in user's authentication. We will discuss how RFID could be applied for this kind of system especially from the standpoint of using RFID as a way to collect information of personal belongings. Also we will discuss security issues of using RFID as a component of the proposed system because while RFID could provide usefulness, it could also be very dangerous for revealing private information without user's awareness.

• 한국ITS학회:학술대회논문집
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• 2010.05a
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• pp.145-147
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• 2010

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2006.07a
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• pp.309-309
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• 2006