• Title/Summary/Keyword: EPCGlobal

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A Study on the Efficiency of the EPCIS using Simulation (시뮬레이션을 이용한 EPCIS의 효율화 방안에 관한 연구)

  • Li, Zhong-Shi;Lee, Chang-Ho
    • Journal of the Korea Safety Management & Science
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    • v.12 no.4
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    • pp.169-174
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    • 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 deals with the method which diversifies the data flow load of intensive EPCIS events and effectively manages EPCIS repository for exchanging data smoothly. In order to verify a effectiveness, we measure the performance of the system using a simulation by comparing the existing method with the suggested method.

Multi dimensional index technique for continuous Query of logistics data (물류 데이터의 연속 질의 처리를 위한 다차원 색인 기법)

  • Chu, Byung-Jo;Hong, Bong-Hee;Kim, Gi-Hong
    • Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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    • 2008.06a
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    • pp.82-88
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    • 2008
  • EPCglobal은 기업 간의 물류 활동 촉진과 글로벌 유통물류 시스템 구축을 위하여 EPCglobal Architecture Framework을 제시 하였다. EPCglobal Architecture Framework의 한 구성요소인 EPCIS(Electronic Product Code Information Services)는 EPC 기반 물류 관련 정보에 대한 저장 및 검색 서비스를 제공한다. EPCIS는 단발성 질의(poll)와 연속 질의(subscribe) 검색 서비스를 제공한다. EPCIS의 연속 질의는 시스템 자동화 및 재고 관리, 공급망 관리를 위해 다양한 응용에서 활용이 가능하다. 일반적으로 연속 질의의 성능을 향상시키기 위해서는 질의 색인을 사용한다. 그러나 EPCIS는 13차원의 도메인과 모든 데이터 필드가 필수 조건이 아니라는 것으로 인해, 차원의 저주 및 무한 영역 질의 문제를 발생 시킨다. 본 논문에서는 EPCIS의 물류 데이터의 연속 질의 처리를 위한 다차원 색인 기법을 제안한다. 13차원의 도메인을 여러 개의 질의 색인으로 구성하고, 등록된 질의 및 입력되는 데이터에 의해 변경되는 동적 질의 실행 계획을 제안함으로써, 차원의 저주와 무한 영역 질의의 문제를 해결하고, EPCIS에서 다수의 연속 질의 등록 시 효율적으로 처리가 가능하도록 한다.

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Enhanced Q-Algorithm for Fast Tag Identification in EPCglobal Class-1 Gen-2 RFID System (EPCglobal Class-1 Gen-2 RFID 시스템에서 고속 태그 식별을 위한 개선된 Q-알고리즘)

  • Lim, In-Taek
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.16 no.3
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    • pp.470-475
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    • 2012
  • In Q-algorithm of EPCglobal Class-1 Gen-2 RFID system, the initial value of $Q_{fp}$, which is the slot-count parameter, is not defined in the standard. And the values of weight C, which is the parameter for incrementing or decrementing the slot-count size, are not determined. Therefore, if the number of tags is small and we let the initial $Q_{fp}$ be large, the number of empty slot will be large. On the other hand, if we let the initial $Q_{fp}$ be small in spite of many tags, almost all the slots will be collided. Also, if the reader selects an inappropriate weight, there are a lot of empty or collided slots. As a result, the performance will be declined because the frame size does not converge to the optimal point quickly during the query round. In this paper, we propose a scheme to allocate the optimal initial $Q_{fp}$ through the tag number estimation and select the weight based on the slot-count size of current query round.

A Study on Development of u-4PL Based Air Cargo Logistics System (항공물류에 적용한 u-4PL 시스템 개발 연구)

  • Li, Guang-Zhu;Na, Hyeong-Seok;Lee, Doo-Yong;Li, Zhong-Shi;Lee, Chang-Ho
    • Journal of the Korea Safety Management & Science
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    • v.10 no.4
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    • pp.181-187
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    • 2008
  • The market of air cargo in Korea grows very quickly and diversifies. It is an essential factor in the process of development of Northeast-Asia as a hub for Air Cargo logistics. But the process of air cargo in Korea is complex as compared with other north-east asia nations and it has many problems and causes inconvenience to owners of freight. We emphasize that 4PL(Fourth party Logistics) is the excellent solution from among many alternatives. The wave of 4PL added to strategic consulting based on new IT techniques, for example RFID, with logistics outsourcing through existing 3PL service is a great issue. It is also worthy of notice that EPCglobal network strengthen the role of 4PL. In conclusion, the 4PL system based on EPCglobal network will result in a good success, so it will raise a prestige of air cargo in Korea to a higher position. This study deals with the new logistics system, air cargo logistics system based on u-4PL system, RFID and EPCglobal network, that will bring many advantages. At the end, we verify the u-4PL air cargo logistics system by simulation tool.

Interference Analysis of RFID Gen-2 System Considering Both PHY and MAC Layers (PHY/MAC 계층을 모두 고려한 RFID Gen-2 시스템의 간섭 분석)

  • Yoon, Hyun-Goo;Choi, Sun-Woong;Jang, Byung-Jun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.21 no.7
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    • pp.752-760
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    • 2010
  • This paper investigates the performance of EPCglobal Generation-2(Gen-2) radio frequency identification(RFID) protocol under reader-to-reader interfering environments. We establish a modified discrete-time Markov chain(DTMC) model for the Gen-2 and accordingly obtain quantitative results of query success rate(QSR) and tag identification speed (TIS). Extensive simulations validate our theoretical analysis and demonstrate that the number of tags over 100 has little impact on the performance. TIS linearly decreases by 10 tags/sec/reader as the number of interfering readers increases. Our model for Gen-2 protocol is also useful to study the performance of other RFID protocols.

A Study on the Architecture for RFID Application Services (RFID 응용 서비스를 위한 아키텍처에 관한 연구)

  • Chang, Jung-Soo;Choi, Jong-Kun;Hur, Chang-Wu;Song, Jung-Young;Jung, Hoe-Kyung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.2
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    • pp.963-966
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    • 2005
  • Recently, Ubiquitous Computing appeared to achieve service that is intelligence enemy without being courted in restriction that is time and space enemy based on developing computer network and Internet festinately. RFID (Radio Frequency Identification) technology that process information of tag that is attached in physical object by point technology that capacitate this Ubiquitous Computing through radio frequency identify is noted. Present RFID connection technologies are Auto-lD Lab and EPCglobal Inc. To center research for standardization progress. But, present RFID related researches connected with tag and leader are progressed vigorously and research about middleware or software description to service actuality tooth is insufficient misgovernment. In this treatise, therefore, characteristic of comparison and analyze about EPC network architecture proposed Auto-lD Lab and EPCglobal Inc. and conceptual application architectures had used existent application development and integration.

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Efficient continuous query processing technique based on selectivity for EPC data with time and location (시공간 EPC 데이터 처리를 위한 선택률 기반 효율적인 연속질의 처리 기법)

  • Chu, Byung-Jo;Hong, Bong-Hee;Kim, Gi-Hong
    • Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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    • 2008.10a
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    • pp.100-105
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    • 2008
  • EPCglobal은 기업 간의 물류 활동 촉진과 글로벌 유통물류 시스템 구축을 위하여 EPCglobal Architecture Framework을 제시 하였다. EPCglobal Architecture Framework의 한 구성 요소인 EPCIS(Electronic Product Code Information Services)는 EPC, 시간, 위치와 같은 물류 관련 정보에 대해 저장 및 검색 서비스를 제공한다. EPCIS는 단발성 질의(poll)와 연속 질의(subscribe) 검색 서비스를 제공한다. EPCIS의 연속 질의는 시스템 자동화 및 재고 관리, 공급망 관리를 위해 다양한 응용에서 활용이 가능하다. 일반적으로 연속 질의 처리를 위해서는 등록된 연속 질의와 입력된 데이터를 순차적으로 비교하는 Sequential Matching 기법을 사용한다. Sequential Matching기법은 등록된 연속 질의 수가 증가 할 경우 많은 부하를 발생 시키고, 이로 인해 시스템 처리 지연이 발생한다. 본 논문에서는 EPCIS의 시공간 EPC 데이터의 연속질의 처리 성능 향상을 위해 선택률 기반 효율적인 연속질의 처리 기법을 제안한다. 13차원의 도메인을 여러 개의 질의 색인으로 구성하고, 등록된 질의 정보를 기반으로 선택률을 계산한다. 선택률에 의해 변경되는 동적 질의 실행 계획을 제안함으로써, EPCIS에서 시공간 EPC 데이터의 연속질의 처리에 대해 평균 60%의 성능이 향상이 가능하도록 하였다.

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A Study on the EPCIS Event Data Modeling and Simulation Test (EPCIS Event 데이터 모델링과 시뮬레이션 검증 연구)

  • Li, Zhong-Shi;Lee, Tae-Yun;Piao, Xue-Hua;Da, Dan;Lee, Chang-Ho
    • Journal of the Korea Safety Management & Science
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    • v.11 no.2
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    • pp.137-144
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    • 2009
  • 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 study suggest the quantitative modeling about total number of EPCIS event data under the assumption to aware the RFID tags of items, cases(boxes), vehicles(carriers, forklifts, auto guided vehicles, rolltainers) at a time on the reading points. We also estimate the number of created EPCIS event data by the suggested quantitative modeling under scenario of process in the integrated logistics center based on RFID system And this study compare the TO-BE model with the AS-IS model about the total sizes of created EPCIS event data using the simulation, in which we suggested the TO-BE model as the development of the repository by skipping the overlapped records.

A Study on 4PL Development to Improve Air Cargo Process (항공물류 프로세스 개선을 위한 4PL 도입 연구)

  • Na, Hyeong-Seok;Jho, Yong-Chul;Lee, Chang-Ho
    • Proceedings of the Safety Management and Science Conference
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    • 2008.04a
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    • pp.383-387
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    • 2008
  • Nowadays, the tendency of world air cargo is noteworthy and air traffic in terms of cargo throughput will no doubt grow significantly in the new Region, with India and China's booming economy and the upcoming Olympics 2008. For example, in the first 11 months of 2006 cargo traffic was increased by 6.3%. First of all, the market of air cargo in Korea grows very quickly and diversifies. It is an essential factor in the process of development of Northeast-Asia as a hub for Air Cargo logistics. However the process of air cargo in Korea is complex as compared with other north-east asia nations. At the same time, it has many problems and causes inconvenience to owners of freight. This paper investigated the process of air cargo in Korea now and analyzed problems of the process. We emphasize that 4PL is the excellent solution from among many alternatives. It is also worthy of notice that EPCglobal network strengthen the role of 4PL. In conclusion, the 4PL system based on EPCglobal network will result in a good success, so it will raise a prestige of air cargo in Korea to a higher position.

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