• Journal of Advanced Navigation Technology
• /
• v.15 no.5
• /
• pp.729-734
• /
• 2011

In this paper, e-Meters middleware and applications using standardized middleware in the EPCglobal is suggested. An standardized middleware of the EPCglobal is designed to manage as a form of SCM and other logistics. In order to support a variety of services using RFID-based, the system must be able to support each protocol. The main features of e-Meters middleware is consist of information status and delivery, distributed database processing, event data analysis, and handling. To operate real time e-Meters system information, The realized middleware is configured to process the results of data collection.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.50 no.12
• /
• pp.292-305
• /
• 2013

EPCglobal has proposed the EPC Sensor Network to efficiently integrate and interoperate the RFID and WSN technologies based on the international standard EPCglobal Network. However, it can not deal with the sensor data without EPS. Also, it does not provide enough management function for the sensor data only. This study proposes USN management system that can deal with these weaknesses of EPC Sensor Network. Not only that, it is suitable for the medical environment properly. In the medical environment, it is important for the medical information to be integrated and interconnected via the standard for medical data. This proposed USN management system is based on SIP-HL 7 and can send RFID and WSN data based on SIP(Session Initiation Protocol). It can be interconnected with the existing hospital information system and exchange the information. Also it can design and materialize SIP Interface based on HL7 that allows the medical information to be exchanged and sent.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.14 no.5
• /
• pp.1133-1138
• /
• 2010

In the anti-collision scheme proposed by EPCglobal Class-1 Gen-2 standard, the frame size for a query round is determined by Q-algorithm. In the Q-algorithm, the reader calculates a frame size without estimating the number of tags in it's identification range. It uses only the slot status. Therefore, Q-algorithm has advantage that the reader's algorithm is simpler than other algorithms. However, it cannot allocate an optimized frame size because it does not consider the number of tags. Also, the conventional Q-algorithm does not define an optimized parameter value C for adjusting the frame size. In this paper, we propose a modified Q-algorithm and evaluate the performance with computer simulations. The proposed Q-algorithm estimates the number of tags at every query round, and determines the parameter value C based on the estimated number of tags.

• Proceedings of the Safety Management and Science Conference
• /
• 2010.11a
• /
• pp.349-355
• /
• 2010

EPCIS(EPC Information Services) system is a core component of EPCglobal Architecture Framework offering information of the freights, the time of awareness and the location of awareness on the EPCglobal Network. The role of EPCIS is to exchange information based on EPC. There are four kinds of event data which are object event data, aggregation event data, quantity event data, and transaction event data. These EPCIS events data are stored and managed in EPCIS repository. This paper leads to separate a in-out data overload of integrated EPCIS event and suggests the method to effectively manage EPCIS repository for exchanging data smoothly. In order to verify a effectiveness, we measure the performance of the system using a simple testing simulation by comparing existing method and suggested method.

• Proceedings of the KAIS Fall Conference
• /
• 2007.05a
• /
• pp.73-76
• /
• 2007

본 논문에서는 EPCglobal Network 기반에서 시스템간의 메시지를 안전하게 암호화하여 전송하고 복호화 하는 방법을 제안한다. 제안하는 시스템은 AES 대칭키 암호화 방법을 통해 메시지를 암호화 하고, PKI 의 X.509 암호화 기법인 주체자의 개인키를 통해 전자서명을 하여 위변조를 판별하며, AES 에 사용된 키는 대상자의 인증서에 포함되어 있는 공개키를 통해 전송해 해준다. 특히 여러 사용자들에게 동시에 편리성과 안전성을 보장할 수 있게끔 하기 위하여 인증서 발급 및 메시지 전송은 웹서비스 기반의 SOAP 메시지를 사용하여 처리한다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2007.10d
• /
• pp.95-99
• /
• 2007

본 논문에서는 EPCglobal Network 상의 물류 정보 시스템인 EPC IS(Electronic Product Code Information Services)와 EPCIS Discovery System의 기능을 확장하여 사용자 정보를 유지할 수 있도록 한다. 본 논문에서 EPC IS에 저장된 정보는 공개(Public)정보와 비공개(Private)정보로 나뉘고, 물류 정보사용자에 따라 접근 가능한 정보가 다르다는 전제하에 물류 정보 사용자가 물류 정보 접근 시 사용자 정보를 유지하는 EPCIS Discovery System과 EPC IS의 연동을 통한 물류 정보 접근 제어가 이루어질 수 있도록 방법과 절차를 제안한다.

• Journal of information and communication convergence engineering
• /
• v.8 no.3
• /
• pp.307-311
• /
• 2010

EPCglobal Class-1 Gen-2 protocol has been proposed for UHF-band RFID systems. In Gen-2 standard, Q-algorithm was proposed to select a frame size for the next query round without estimating the number of tags. Therefore, the Q-algorithm has advantage that the reader's algorithm is simpler than other algorithms. However, it is impossible to allocate the optimized frame size. Also, the original Q-algorithm did not define an optimized parameter C for adjusting the frame size. In this paper, we propose an adaptive Q-algorithm with the different parameter $C_c$ and $C_i$ in accordance with the status of reply slot. Simulation results show that the proposed adaptive Q-algorithm outperforms the original Gen-2 Q-algorithm.

• Proceedings of the KAIS Fall Conference
• /
• 2006.05a
• /
• pp.442-445
• /
• 2006

본 논문에서는 EPCglobal Network 기반에서 RFID를 이용하여 상품의 판매와 재고를 실시간으로 모니터링하고 이를 효율적으로 관리할 수 있도록 실시간 판매 및 재고 관리 시스템을 제안한다. 제안하는 시스템은 RFID를 이용하여 매장의 진열상품과 재고상품에 대한 정보 파악이 실시간으로 가능하며, 지능형 학습에 의한 안전재고 임계값 계산 및 자동 공지 에이전트를 통해 효율적으로 자동 발주 프로세스를 지원해 줄 수 있어 상품 진열대 및 창고의 재고 상품을 효율적으로 관리할 수 있다. 또한 매장의 진열대 및 상품 보관 창고에 있는 상품의 부족 현상(결품)으로 인한 판매 손실을 최소화하기 위해 적시에 상품을 보충 할 수 있도록 지원이 가능하다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.8 no.11
• /
• pp.3997-4015
• /
• 2014

Radio frequency identification (RFID) is an emerging wireless communication technology which allows objects to be identified automatically. The tag anti-collision is a significant issue for fast identifying tags due to the shared wireless channel between tags and the reader during communication. The EPCglobal Class-1 Generation-2 which uses Q algorithm for the anti-collision is widely used in many applications such as consumer electronic device and supply chain. However, the increasing application of EPCglobal Class-1 Generation-2 which requires the dynamic environment makes the efficiency decrease critically. Furthermore, its frame length (size) determination and frame termination lead to the suboptimal efficiency. A new anti-collision algorithm is proposed to deal with the two problems for large-scale RFID systems. The algorithm has higher performance than the Q algorithm in the dynamic environment. Some simulations are given to illustrate the performance.

• The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
• /
• v.16 no.3 s.55
• /
• pp.3-15
• /
• 2005

본 고에서는 최근 많은 관심을 갖고 있는 900 MHz UHF 대역을 사용하는 RFID시스템의 무선 인터페이스 표준에 대해 살펴본다 900 MHz UHF 대역의 RFID시스템은 유통,물류에 사용될 것으로 기대되기 때문에 국제표준화기구인 ISO와 국제 민간표준화 기구인 EPCglobal에서 무선 인터페이스 표준을 세우고 있다. 특히 2004년부터 이뤄진 EPCglobal의 EPC Class 1 Generation 2표준은 향후 ISO의 900 MHz 대역 RFID 시스템의 새로운 무선 인터페이스 표준으로 정해질 것으로 기대되고 있어 더욱 관심을 모으고 있다. 이에 본 고에서는 900 MHz대역 RFID 무선 인터페이스 표준인 ISO/IEC의 ISO 18000-6과 EPCglobal의 EPC Class 1 Generation 1, Generation 2 를 중심으로 900 MHz대역 RFID 시스템의 무선 인터페이스 표준화 동향을 살펴보았다.