• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.245-246
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• 2013

본 논문에서는 UC/OS 시스템을 사용하는 IEEE802.11 무선 MAC프로토콜의 처리과정중탐색, 인증, 결합 과정을 이더넷으로 동작하는 하드웨어 위에 에뮬레이션하였다. 에뮬레이션 환경은ADSv1.2을 사용하고, RTOS는UC / OS를, 사용언어는 C언어를 활용하였다. 검증과정으로는 이더넷으로 구동되는AP와 단말 하드웨어에 각각PC를 하이퍼 터미널으로 접속하여 탐색, 인증, 결합과정에 해당하는 절차를 수행하였다.

• Journal of Internet Computing and Services
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• v.10 no.6
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• pp.7-17
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• 2009

The development of wireless communication MAC layer is usually released as SoC which is a combination in hardware and software. In this system development environment, an environment for software development and verification is necessary because the hardware development takes a lot of time priori to completion. In integrated development of hardware and software, simulation environment of hardware and software provided by hardware modeling using HDL at RTL and ISS respectively. By increasing the development complexity of system, ESL design modeling systems at higher abstraction level than RTL has already prompted. The ESL design is divided untime model and time model. This paper present design and implementation of MCU for untime model simulation, not time model. Proposed MCU can optimize the system at early step of system development and move up the development completion time by verifying the system function easily and rapidly than part required exact time in untime model. In this paper, we present an MCU module based on SystemC and UC/OS-II Module providing real-time operate system.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.592-594
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• 2004

프로토타입핑은 제품 개발을 위한 필요한 과정이지만 실제로 제품의 모형을 만든 후에 외형 및 기능을 검사하기 때문에 제품 개발 시간과 비용이 많이 들게 된다 컴퓨터 기술을 이용한 가상 프로토타이핑 시스템은 이러한 단점을 보안하기 때문에 않은 연구가 되고 있다 본 논문에서는 내장형 시스템 개발용 가상 프로토타입 플렛폼 제작을 위해 PDA와 휴대형 단말장치에서 가장 많이 사용되는 ARM코어를 기반으로 하는 ARMulator상에 하드웨어 IP를 구현하고 실시간 운영교제인 UC/OS-11를 이식하여 내장형 소프트웨어 개발용 가상 프로토타이핑의 환경을 구축하였다. 세 개의 타스크로 구성된 검사 프로그램를 운영하여 구축된 시스템의 동작을 확인하였다. 구축된 시스템은 내장형 시스템의 소프트웨어 개발을 위한 가상 환경을 제공한다.

• Journal of Institute of Control, Robotics and Systems
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• v.13 no.3
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• pp.230-234
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• 2007

Generally, huge amounts of data traffic are generated by using broadcasting method to deliver sensing data to a sink node reliably so that it makes a severe network saturation problem resulting in unreliable data transfer. In order to handle this problem, a new congestion control protocol is required for supporting reliable data transfer, minimal use of energy and network resources at the same time in wireless sensor networks. In this paper, it proposes a Protocol to guarantee both a reliable transfer in data accuracy and minimum consumption of energy waste by using Hop-by-Hop sequence number and DSbACK(Delayed and Selective ACK Buffer Condition) scheme. In addition, it proves that reliability and energy efficiency are enhanced by the proposed method with the simulation results performed on TinyOS platform which is a component based built-in OS announced by UC Berkely with the performance comparison of other existing methods.

• Journal of the Korean Society of Radiology
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• v.1 no.1
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• pp.39-44
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• 2007

In this study, wireless measurement technique for human motion was developed to monitor movement disorder patients during their daily life. MICA, TinyOS, and nesC, developed by UC Berkeley, were used as wireless sensor, its software platform, and programming language. The human motion data, generated by two axial accelerometer(ADXL202) was transmitted to PDA(iPaq3630) by 916Mhz short range communication chip(TR1000). It could be stored at PDA by simple Windows CE programming. To test the developed device, it was attached at human chest and the acquired data was shown as a graph during his motion of sitting, standing, and lying. The result showed that human motion could be logged without any hooking and constraints. Therefore, this device can be used to monitor patient's movement disorder and activity of daily life(ADL).