• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.4
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• pp.648-655
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• 2007

Nowadays, to realize ubiquitous computing environment, many research activities have been going on within various kinds of research domains including automatic identification sensor network, home network, telematics and so on. Especially, RFID middleware that supports the aggregation of RFID tag data, control and management, and the integration with legacy systems has recently gained a lot of attention. Meanwhile, EPCglobal defined an ALE(Application Level Events) standard specification, which exists between RFID readers and applications, and substitutes the previous systems called Savant. In the specification internal structures and implementation technologies of ALE are not mentioned and only external interfaces are defined. This approach easies the verification of standard compliance and inter-operability of the layer. In this paper, we present the design of ALE-compliant RFID middleware systems that process RFID tag data efficiently.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.469-473
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• 2006

Nowadays, to realize ubiquitous computing environment, many research activities have been going on within various kinds of research domains including automatic identification, sensor network, home network, telematics and so on. Especially, RFID middle-ware that supports the aggregation of RFID tag data, control and management, and the integration with legacy systems has recently gained a lot of attention. Meanwhile, EPCglobal defined an ALE(Application Level Events) standard specification, which exists between RFID readers and applications, and substitutes the previous systems called Savant. In the specification internal structures and implementation technologies of ALE are not mentioned and only external interfaces are defined. This approach easies the verification of standard compliance and inter-operability of the layer. In this paper, we present the design of ALE-compliant RFID middle-ware systems that process RFID tag data efficiently.

• Annual Conference of KIPS
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• 2011.04a
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• pp.1394-1397
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• 2011

RFID 기술을 이용한 다른 분야에서 사용하고 있는 응용과의 통합 및 데이터 수집, 제어, 관리, 등을 지원하는 RFID 미들웨어의 중요성이 확산 되고 있다. RFID 기술이 확산됨에 따라 EPCGlobal 에서는 RFID 하드웨어와 응용 사이에 존재하는 ALE(Application Level Events) 표준 스펙을 검증 및 절차를 통일하여 정의하였다. 그러나 대규모의 분산된 실제 현장을 대상으로 시스템 방식을 생각해보면 ALE방식이 다양한 RFID 리더들을 처리하는데 있어서 유용하지 않다. 따라서 본 논문에서는 ALE 표준 규약형식은 지키며 다양한 RFID 리더 처리를 보증 하기위하여 기능들을 재정의 한다. 재정의 된 기능들을 기반으로 다양한 RFID 리더 들을 처리하기 위하여 인터페이스를 정의한다. 이를 통하여 RFID 미들웨어 성능을 높이는 시스템을 제안하고자 한다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.31 no.3
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• pp.80-89
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• 2008

Because of different hardware specifications, there are no unified protocol commands to use with various kinds of RFID readers. The current commercial RFID middlewares do not satisfy the various requirements from users to support business process logic representation. The EPCglobal, which is leading organization for the RFID research, suggested a RFID middleware architecture which is called ALE(Application Level Events) standard. However, their architecture also does not provide the application level's interfaces. Therefore, a new RFID middleware architecture is required to provide basic RFID functions, conform to ALE's specification and, additionally, support application level's business logic representation. This paper proposes a ALE-based RFID middleware architecture which provides business process logic representation. At first, the basic RFID control functionalities are identified. Secondly, the business process logic requirements in RFID applications are identified and classified Into six categories. Third, the Middelware architecture is implemented with Java and XML technology so that it can easily extended to support the various RFID hardware's protocols. Finally, an example RFID prototype system is developed to show the proposed architecture's feasibility and validate it. The proposed middleware is expected to be used In various application areas since it is using XML technology for easy adaptation and it also con- forms to ALE interface which is standard specification.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06a
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• pp.316-318
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• 2012

Radio Frequency Identification(RFID) technology has been widely used to identify and keep track of physical objects. The EPC Network Architecture, which is proposed by EPCglobal to promote EPC and RFID technologies, consists of several layers to deal with the captured data. Many studies concentrated on dealing with RFID tag data (ECReports) from ALE. However, there is no well-known work on specifying how to generate high level EPCIS events. For the incoming ECReports, Capturing Application cannot decide to generate which event types and how to get the semantic fields. In this paper, we propose the new Capturing Application (NCA) to solve the problem. NCA can generate EPCIS events correctly and automatically.

• Journal of Korean Institute of Industrial Engineers
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• v.33 no.4
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• pp.430-438
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• 2007

In the current RFID (Radio Frequency IDentification) middleware systems based on the EPCglobal standard, the tag data received by multiple readers are processed sequentially in FIFO (First In First Out) order. Considering the priority of RFID reader makes the RFID system more flexible and improve the data transaction throughput in the service environment where important tag data with high priority for a specific reader. In this study, we propose a new RFID middleware system architecture supporting priority service with the Buffer Management Component. Our proposals are compliant with the EPCglobal ALE (Application Level Events) standard interface for middleware systems and their clients. To verify the efficiency of this proposed system, simulation is used for evaluation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.10a
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• pp.115-118
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• 2010

최근 RFID (Radio Frequency Identification)기술은 다양한 분야에서 관심을 받고 사용되고 있으며 RFID 리더의 종류도 매우 다양하다. 이러한 RFID 리더들을 지원하기 위해 RFID 미들웨어는 리더에서 지속적으로 발생하는 데이터를 수집, 제어, 관리하는 기능을 가지고 있으며 다양한 형태의 RFID 리더 인터페이스를 지원하여 이기종 RFID 리더와의 연동을 용이하게 한다. 현재 표준 규약에 따른 RFID 미들웨어들이 개발되고 있으며 RFID 표준 단체인 EPCglobal에서는 EPC (Electronic Product Code) 처리 시스템에서 RFID 태그를 인식한 리더가 애플리케이션 계층으로 데이터를 전달하는 역할을 하는 ALE (Application Level Events)라는 RFID 미들웨어를 제시하였다. 그러나 표준을 따르는 RFID 미들웨어는 그 자체가 복잡하고 부피가 크며 가격이 높기 때문에 이를 기반으로 한 시스템은 개발 속도가 늦어지고, 유지보수가 힘들어진다. 따라서 한 기업 내에서 사용되는 애플리케이션의 크기가 소규모 또는 중규모인 경우를 위해 보다 가벼운 RFID 미들웨어가 필요하다. 본 논문에서는 다양한 RFID 리더를 처리하기 위한 리더 매니저와 애플리케이션의 목적에 맞는 이벤트를 생성하는 쿼리 매니저를 가진 경량의 RFID 미들웨어를 개발하고자 한다. 리더 매니저는 RFID 리더를 관리하기 위한 추상 어댑터를 제공하고 리더 구성 XML 파일을 이용하여 RFID 리더를 관리한다. 쿼리 매니저는 질의 조건을 주기적으로 체크하는 스케줄러를 통해 RFID 이벤트를 관리한다. 본 경량적 RFID 미들웨어는 하드웨어의 투명성을 지원하며, 유지보수가 용이하고 유연성과 확장성을 제공하는 RFID 애플리케이션을 개발할 수 있도록 해준다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.5A
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• pp.451-459
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• 2007

RFID it reads information which is it writes, the semiconductor chip for and the radio frequency system which uses the hazard antenna it has built-in transmission of information it talks. Formation which is transmitted like this collection and America which it filtrates wey the RFID search service back to inform the location of the server which has commodity information which relates with an object past record server. The hazard where measurement analysis result the leader for electronic interference does not occur consequently together from with verification test the power level which is received from the antenna grade where it stands must maintain minimum -55dBm and the electronic interference will not occur with the fact that, antenna and reel his recognition distance the maximum 7m until the recognition which is possible but smooth hazard it must stand and and with the fact that it will do from within and and and 3-4m it must be used Jig it is thought.