• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.583-586
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• 2008

RFID technology of Ubiquitous core technology was used the local parts of Traceability System in past, but the various parts of u-Healthcare, Home networks, Telematics, and etc. in today on the one hand, according to be interested in the home networks technology and develope it, we are searching about how to apply RFID technology in home networks. This paper is designed and implemented the system delivered tag information to the application of home networks and controled RFID reader remotely by the bundle implemented RFID reader process methods based OSGi framework platforms.

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.587-590
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• 2008

The Web 2.0 is mean to Web as Platform, as the platform provided various service using a data on webs by opening information. That is, it leads to the sharing and participation of information among internet users. In this paper, we research web technology for embedded computers which be supplied data and services to implement Ubiquitous computing. Therefore, we designed Open API service platform used the embedded system for the sharing and opening of web 2.0 trends. This designed platform is provided to internet users with various services and information in real-time.

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.547-550
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• 2008

Recently, changes in the environment of user-centric internet service such as blog, UCC and IPTV and ubiquitous computing based on web service are needed to high availability system platform. High availability system is to provide safe service continuously even if system failure occurs in clustering system at the network. And it is necessary to synchronize data for reliable service in high availability system. In this paper, I implement DRBD(Disk Replicated Block Device) which is synchronization technique for data of local disks in high availability system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.1015-1018
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• 2006

According to the number of the books in the library growing dramatically, dealing with them becomes a serious problem. Especially Plenty of budgets have been consumedin arranging and keeping the books. To solve these confronted problems, RFID technology is researched in this thesis. By utilizing the mobile RFID readers, Book Management System which makes possible to reduce time and cost to input the information of locationand present situation of books in real time is developed. Moreover since the active tag which uses the 900 radio frequency band and mobile RFID reader are used, it is possible to achieve multi-recognizing system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.441-443
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• 2010

Techniques for processing continuous queries are required to developing the various types of application services in ubiquitous environment where the real-time data acquisition from a lot of sensors, analysis, and processing are required. In the previous works of the continuous queries, they have represented all of the continuous queries as the interval queries or region queries, and proposed some methods for processing theses queries. The types of continuous queries, however, are very various, and could be presented by combining the attribute conditions, spatial conditions, and temporal conditions. In this paper, I have classify the types of continuous queries, and have proposed the continuous query model which could be presented by combining those conditions. The contributions of this paper include that it proposes the query model representing the continuous queries and suggests future research directions.

• Journal of Korea Society of Industrial Information Systems
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• v.11 no.2
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• pp.98-102
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• 2006

Recent development of Information Technology, the ubiquitous computing environment is on the rise. At the same time, RFID technology and its related applications are actively investigated. In this paper, a portable merchandise information providing system using cheap wireless transmission module is developed in order to overcome the mobility limitation of the wired RFID system. The TRF6901 chipset of 900MHz band from TI is used for the wireless transmission module and the MPS430F149 is used for the MPU. It is expected that the developed system can be applied to numerous innovative wireless applications such as library circulation desk for lending service and automated door system for entrance control.

• Journal of KIISE:Computing Practices and Letters
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• v.15 no.2
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• pp.89-97
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• 2009

Embedded systems widely used in ubiquitous environments usually employ an event-driven programming model instead of thread-based programming model in order to create a more robust system that uses less memory. However, as the software for embedded systems becomes more complex, it becomes hard to program as a single event handler using the event-driven programming model. This paper discusses the implementation of non-preemptive real-time scheduling theory for the design of embedded systems. To this end, we present an efficient schedulability test method for a given non-preemptive task set using a sufficient condition. This paper also shows that the notion of sub-tasks in embedded systems can overcome the problem of low utilization that is a main drawback of non-preemptive scheduling.

• Journal of the Korean Institute of Intelligent Systems
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• v.18 no.3
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• pp.429-436
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• 2008

Nowadays fires must be detected rapidly Abstract, and by connecting the detector's distribution, sender, transponder, receiver and others can be connected. Mechanical systems are implemented in today's buildings. However, this kind of constructing method has some disadvantages, that is, if fire happens somewhere, we cannot judge where the fires happen, and it is also difficult to judge what extent the fires reach. In order to overcome the disadvantages, in this paper, according to the tendency of combining the Ubiquitous and Intelligent Network, we propose a type of system by using the method of comparing the differences of the existed systems. The proposed system is designed to perceive the fires rapidly and confirm the fire place and fire scale correctly.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.1
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• pp.216-221
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• 2007

In this paper, we propose a new traceability system that integrates ubiquitous sensor network for monitoring agricultural environment. The proposed system using EPC network can provide informations of agro-livestock products traceability quickly and efficiently. Moreover, this system with RFID Technology gives intelligence of distribution and record. Because of new agro-livestock products traceability system, farm family's income will increase with customer satisfaction.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.9
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• pp.1702-1708
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• 2007

Dragon Stream Cipher is proposed for software base implementation in the eSTREAM project. Now this stream cipher is selected as a phase 3 focus candidate. Dragon is a new stream cipher contructed using a single word based NIFSR(non-linear feed back shift register) and 128/256 key/IV(Initialization Vector). Dragon is the keystream generator that produce 64bits of keystream. In this paper, we present an implementation of Drag(m stream cipher algorithm in hardware. Finally, the implementation is on Altera FPGA device, EP3C35F672I and the timing simulation is done on Altera's Quartus II. A result of 111MHz maximum clock rate and 7.1Gbps is throughput is obtained from the implementation.