• Proceedings of the KAIS Fall Conference
• /
• 2009.05a
• /
• pp.99-102
• /
• 2009

본 논문에서는 RFID를 이용하여 PC 보안 소프트웨어를 설계 및 구현을 하였다. 본 논문에서 연구한 PC 보안 소프트웨어는 송신기인 RFID Tag와 수신기인 RFID Reader에 연결된 안테나를 통해 서로 통신하여 PC에 설치된 S/W를 이용하여 사용자 인증을 받는 PC 보안 방법이다. 이는 위조 및 변조가 불가능하며, 스니핑 공격 및 스푸핑 공격에 대하여 기존의 PC 보안 시스템보다 안전성이 향상되었다.

• Proceedings of the KAIS Fall Conference
• /
• 2010.05a
• /
• pp.572-575
• /
• 2010

본 논문에서는 RFID를 이용하여 PC 보안 소프트웨어를 설계 및 구현을 하였다. 본 논문에서 연구한 PC 보안 소프트웨어는 송신기인 RFID Tag와 수신기인 RFID Reader에 연결된 안테나를 통해 서로 통신하여 PC에 설치된 S/W를 이용하여 사용자 인증을 받는 PC 보안 방법이다. 이는 위조 및 변조가 불가능하며, 스니핑 공격 및 스푸핑 공격에 대하여 기존의 PC 보안 시스템보다 안전성이 향상되었다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2008.05a
• /
• pp.563-566
• /
• 2008

In RFID system. when a variety of tags are present in the interrogation zone of a single reader at the same time, the system requires a multiple tag identification scheme that allows the reader to read data from the individual tags. Anti-collision algorithms required for the multiple tag identification are essential for the implementation of RFID system. This paper analyzed the performance of SFSA algorithm, which is easy to implement. According to the analytical results, the algorithm's performances are closely related with the number of tags and the frame size.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• v.9 no.1
• /
• pp.565-568
• /
• 2005

RFID system allows contactless identification of objects, where small tags are attached to objects and information of objects are transferred using radio frequency. In recent years, industries have incorporated several identification systems to its production processes, which allow collecting automatically information about goods. In order to communicate with a single tag out of a group of tags, the target tag has to be identified. Therefore the read has to attempt to obtain the unique identification code of each tag within its read range. This paper presents performance results of QT and QT-sl protocols, which are tag identification protocols incorporating memoryless property. The memoryless property is that the current response of each tag only depends on the current query of the reader but not on the past history of the reader's queries.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2009.05a
• /
• pp.91-94
• /
• 2009

RFID is application field is very wide. For example, There is parking administration system, bookkeeper administration system etc. Such application system must do priority Carrier wave choice according to application purpose. If in case of Carrier frequency is low, awareness distance is short and Carrier frequency is high, awareness distance is very long. This uses in case awareness object is fast-moving. And it must be Tag's supply and demand's that is smooth. Even if development of system is completed, if Tag's purchase is difficult, developing item is not need. In this paper, we shows RFID system using EM4095 chip that is using 125KHz by carrier wave. EM4095 is high effectiveness chip of the low-power and circuit is very simple. It is possible to read with being write as that connect 4 lines with MCU. MCU used Atmega128. As result, we explained circuit and control programs for each part, and show Tag's ID reception that use Reader by picture.

• Proceedings of the Korea Contents Association Conference
• /
• 2005.11a
• /
• pp.533-538
• /
• 2005

Due to rapidly inc Due to rapidly Increase the number of vehicles, the number of vehicle passed over the traffic capacity which is allowable on each road. In order to disperse the traffic in the congestion area, ITS related techniques have been studied advancing. However, the cost of setting up and managing In is considerable to recently improve the problem or In, various traffic analysis technique are problem using low cost RFID. In this paper, the method of RFID-Reader location selection, which is a core technique to analyze traffic amount and traffic context is proposal. In order to systematically utilize traffic related road information, GIS is used for the proposal method. In addition, a rule-based model using O/D data that is the important information for selection the location of traffic observation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• v.9 no.2
• /
• pp.459-462
• /
• 2005

In this paper, we investigate the high precision location estimation algorithm in 2.45GHz band RTLS with multiple tags. The location is estimated in LOS environments, 300m ${\times}$ 300m area, and 2D coordinates adopting a TDOA scheme which is not necessitate the transmission time of tags. We evaluate the average estimation error in distance assuming that tags are randomly distributed and the readers(3${\sim}$8) are uniformly(equal space) placed in test area. In results, average estimation error is 3.12m and 1.47m at reader numbers of 4 and 8, respectively. Minimum estimation error is obtained when the accumulated receiving signal from a tag is 3 or 4 regardless of available reader numbers. The error is less than 3m, satisfies the specification of RTLS.

• Proceedings of the KSR Conference
• /
• 2011.10a
• /
• pp.226-231
• /
• 2011

This research was done to prove the optimal position to detect a train reader when using a multiple fusion sensor. The experiment was done using four Train installed RFID Readers located on the train. These readers were read by sensors installed at intervals of 50 meters on the up and down sections of the Line 8, from Amsa station to Moran station. We analyze errors in the recognition range according to the Tag's number of recognition due to RFID of train speed, and propose a method of estimation for an accurate estimation of the position of train At this the Least-Squares Method is applied to judge the position of train accurately from the error because of Tag's number of recognition and RFID of train speed. also It is verified through simulation.

• Proceedings of the Korean Information Science Society Conference
• /
• 2006.10c
• /
• pp.226-229
• /
• 2006

오늘날 갈수록 인구의 고령화가 심각해지고 있다. 이러한 고령화로 인하여 노약자들을 위한 다양한 환경과 시스템이 필요한데 행위 인식 기술은 이러한 기술의 전처리 기술로서 활용될 수 있다. 본 논문에서는 RFID tag와 Reader를 이용하여 정보를 가져온 뒤 사용자의 행위를 추론하고 이를 기록하는 시스템을 설계 밀 구연을 하였고 앞으로 개선되어야 할 부분을 지적하였다.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2005.10a
• /
• pp.942-945
• /
• 2005

This paper tried to analyze the collection and management method of shop-floor information for development of digital framework in u-manufacturing. In detail, the shop-floor information collection method through the direct communication with manufacturing devices using network Including RS-232C/422, field bus and ethernet is analyzed and proposed. In case the direct communication is impossible, the information collection method through additional sensors or data acquisition units is analyzed and proposed. Moreover, the collection method through bar code reader or touch screen of operators is analyzed and proposed to act up to machine to man/mobile/machine.