• The KIPS Transactions:PartD
• /
• v.11D no.6
• /
• pp.1247-1258
• /
• 2004

The LBS(Location-Based Service), which is based on individual's mobility, is required increasingly as mobile telecommunication and various infrastructures have developed rapidly. The technologies for LBS are location determination technology, service platform technology, contents provider technology and moving object database technology generally. Among these, service platform must be interoperable with location gate-way server and provide common function of billing, authentification, protect location information, privacy control, location trigger and intelligent acquisition and so on. The TTA(Telecommunications Technology Association) published specification that defines a standard protocol for safe and simple interface between LBS client and LBS platform and the OpenLS(Open Location Service) in OGC (Open GIS Consortium) released implementation specifications for providing Location based core services. In this paper, we implemented service platform for LBS which is able to interoperable with location gateway server and contents provider and is caracterized as follows. First, it could require and response location information from different types of location gateway server with same interface. Second, it complies with the standard interfaces with OpenLS 4 contents providers for core LBS. Third, it could provide location of wired phone as well as wireless mobile terminal compling with the standard protocol. Last, it could provide trajectorH information based past location as well as current location, because it is able to interoperable with moving object DBMS. This paper contributes to the construction and practical use of LBS by providing the method of implementation of service platform for LBS.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.21 no.11
• /
• pp.180-186
• /
• 2020

ICT convergence using smart livestock is that in the first-generation dairy smart farm model, each device made by several manufacturers uses its own communication method, limiting the mutual operation of each device. This study uses a model based on open control technology to secure interoperability of existing ICT devices and to manage data efficiently. The open integrated control derived from this process is the software interface structure of Open API. It is an observer that serves as real-time data collection according to the communication method of ICT devices and sensors located at each end. It consists of a broker that connects and transmits to the upper integrated management server. As a result of the performance analysis through verification of two first-generation dairy smart farm model sites, the average daily milk production increased compared to the previous year (farm A 5.13%, farm B 1.33%, p<0.05). Cow days open (DO) was reduced by 17.5% on farm A and 13.3% for farm B(p<0.05). Cows require an adaptation period after the introduction of the ICT device, but if continuous effects are observed, the effect of production can be expected to increase gradually.

• Journal of Korea Spatial Information System Society
• /
• v.1 no.1 s.1
• /
• pp.19-28
• /
• 1999

The focus is moving from the problem of building data to the problem of accessing and efficient utilization of data fitting to the purpose of a user. A distributed technology and a standard of geodata and geoprocessing is needed to satisfy these needs. This paper suggests an implementation method of a standard interface defined by OpenGIS with CORBA which is a distributed object technology. A client can invoke Open API of the middleware implemented with CORBA through IIOP. CORBA server objects which provide a client with Open API is the essence of an interoperability. CORBA server objects wrap the data formats and access methods of different GIS engines, and translate the data formats of different data servers to a standard data format.

• Proceedings of the Korean Information Science Society Conference
• /
• 2000.04b
• /
• pp.3-5
• /
• 2000

최근 지리 정보 시스템(GIS)이 전 국가적으로 대중화되면서 서로 다른 분야에서 구축되어 서로 다른 환경에 분산되어 있는 이질적인 공간 데이터의 상호운용성에 대한 필요성이 증가하고 있다. 이러한 상호운용성을 위해 OGC에 의해 표준 사양인 OpenGIS이 개발되었고, 이 사양을 바탕으로 개방형 지리 정보 시스템을 개발하여 다양한 데이터 소스간의 상호운용성을 얻고자 하는 연구가 활발히 이루어지고 있다. 그러나, OpenGIS 사양을 따르는 상호운용성 지원 방법에서는 다양한 형태의 데이터 소스별로 데이터 제공자의 개발이 필요하다. 따라서 이러한 부담을 줄이고 효율적인 데이터 저장 및 관리를 위한 단일 처리 모델의 제시가 필요하다 이에 본 논문에서는 표준 데이터 언어인 XML과 기타 다른 관련기술을 OpenGIS 서버의 데이터 제공자 컴포넌트에 도입하여, OpenGIS 사양을 따르는 기존의 이질적인 데이터 소스와의 연등을 지원할 뿐 아니라 표준화된 저장 구조의 데이터 소스에 대한 하나의 효율적인 데이터 제공자를 갖는 OpenGIS 서버를 설계 및 구현한다. 본 시스템은 OpenGIS의 지리 데이터 구조와 처리에 대한 인터페이스의 표준화를 통해 상호운용성을 보장하고, OLE/COM 사양을 이용하여 각 컴포넌트들의 재사용성을 지원하며, 또한 문서 저장 및 전달을 위한 데이터 형식의 표준인 XML을 사용하여 문서구조의 검증 기능과 문서접근 방식의 단일화를 지원한다.

• Journal of Korea Spatial Information System Society
• /
• v.1 no.2 s.2
• /
• pp.47-62
• /
• 1999

To meet the interoperability requirements associated with geospatial data access and geoprocessing, much efforts to design prototypical systems conforming to $OpenGIS^{TM}$ specification has been made. With respect to Object Web GIS, however, current internet mapping technology mainly focuses on either developing mapping libraries or client applications regardless of the future needs for interoperability such as an integration of $OpenGIS^{TM}$ standard for CORBA. In this paper, we propose an $OpenGIS^{TM}$ compliant mapping kernel. OpenViews, which is designed to meet those requirements. The kernel of OpenViews encapsulates the process of acquiring geospatial data in the format of $OpenGIS^{TM}$ Geometry through ORB(Object Request Broker). OpenViews, being designed based on well-known design patterns, is a highly extensible in that programmers can easily customize it on the object oriented architecture. The components implemented in OpenViews are CORBA/Java objects, and as such are portable and scalable in a networked environment. A companion package, OpenBroker, is also developed as a portable geoprocessing application server to facilitate the implementation and configuration of server side CORBA objects. It can be used for implementing objects for spatial analysis service which would be independent of legacy spatial database systems in many cases. OpenViews, together with OpenBroker, has been successfully prototyped using the technologies including EJB and servlet as the core components of an Open GIS compliant internet mapping.

• Proceedings of the KIEE Conference
• /
• 2000.07d
• /
• pp.2426-2428
• /
• 2000

필드버스 통신망 기술은 현장 계기를 연결하는 제어자동화용 실시간 통신망 기술로서, 디지털, 양방향, 멀티드롭, 직렬버스 특성을 가진다. 국내의 발전소 또는 공장 등에 일부 도입되고 있는 필드버스는 그 시스템과 소프트웨어가 외국 특정 업체의 독자적인 제품들이어서, 고가이며, 유지보수에 벤더 종속성이 크다. 본 논문에서는 상기의 문제점을 해결하기 위해서 가격이 저렴하고 호환성이 뛰어난 개방형 표준 통신카드와 PC를 기반으로 설계한 필드버스 통신 프로토콜을 간략히 소개하고, 이 프로토콜을 실제로 국내 B화력 발전소 시뮬레이터 입출력 인터페이스 시스템(IOIS:Input Output Interface System)에 적용한 사례의 성능 분석 을 제시한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2003.05a
• /
• pp.226-230
• /
• 2003

In this thesis I analyzed that V5.2 protocol function is effective to fulfill all of the services that are provided at the existing local exchange. I analyzed this in five methods that refer to ETSI inside patronage. I experimented turnaround time by Start-up method and verified V5.2 protocol function when Start-up. Also I confirmed stability of system by the reconstruction-ability experiment related E1 switch over. I verified V5.2 protocol function through PSTN call process that uses a special service test and local call simulator. As a result of experiment, I confirmed the best method when simultaneous Start-up. V5.2 protocol function was excellent and It becomes switch over at 1/1000 seconds when E1 is out of service. V5.2 protocol function was effective to fulfill all of the special services that are provided at local exchange and its long call process ability was superior to KT standard with 4 fails in 20000 calls. Through the experiment, it was proved that V5.2 interface will become a significant element of communication network when after LE side expanse of v5 interface ID with TDX-100 exchanger and the AN occurrences OOS by message transmission limit and call disconnect when E1 switch over are improved.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2001.10b
• /
• pp.1037-1040
• /
• 2001

생체인식 기술이 차세대 보안 기술로서 주목을 받고 있으나 대부분의 생체 시스템이 독립적으로 존재하고 있어, 표준화 노력의 일환으로 세계적인 생체인식협회인 BioAPI Consortium에서 표준 BioAPI version 1.1이 제정되었다. 본 논문에서는 BioAPI에서 제안한 명세서를 토대로 하여 클라이언트-서버구조로서 웹기반 사용자 인증시스템을 설계한다. 클라이언트는 입력 장치 및 BSP에 따른 Hybrid기법을 적용함으로서 신뢰성을 부여하여 웹 상에서 사용자의 취득 가능한 여러 생체 정보를 검증 자료로 사용하고, 실 시간성을 부여하기 위하여 ActiveX를 사용하여 객체의 크기를 작게 한다. 서버는 생체검증의 기본기능인 등록, 인증, 검증을 할 수 있도록 BioAPI 인터페이스를 사용하여 BSP에 따른 기 입력된 사용자의 생체 정보를 검증하게 되며, 본 논문에서는 구조적 접근 방법을 사용한 서명과 ID 및 password 의 조합을 검증기로서 사용하게 된다. 개방형 네트워크인 웹 상에서 생체 정보를 이용한 사용자 검증시스템은 전자 상거래 등의 신원확인이 필요한 분야에 신뢰성을 제공한다.

• Journal of Korea Spatial Information System Society
• /
• v.5 no.1 s.9
• /
• pp.49-63
• /
• 2003

Recently, two international standard organizations, ISO and OGC, have done the work of standardization for GIS. Current standardization work for providing interoperability among GIS DB focuses on the design of open interfaces. But, this work has not considered procedures and methods for designing GIS DB. Eventually, GIS DB has its own model. When we share the data by open interface among heterogeneous GIS DB, differences between models result in the loss of information. Our aim in this paper is to revise the design guidelines for geographic information databases in order to make consistent spatial data models, logical structures, and semantic structure of populated geographical databases. In details, we propose standard guidelines which convert ISO abstract schema into relation model, object-relation model, object-centered model, and geometry-centered model. Furthermore, we provide sample models for applying these guidelines in commercial GIS S/Ws. Building GIS DB based on design guidelines proposed in the paper has the following advantages: the interoperability among databases, the standardization of schema definitions, and the catalogue of GIS databases through.

• Journal of Broadcast Engineering
• /
• v.26 no.4
• /
• pp.377-389
• /
• 2021

This paper presents a framework design of a digital twin system for a vertical smart farm. In this paper, a framework of digital twin systems establishes three factors: 1) Client 2) IoT gateway, and 3) Server. Especially, IoT gateway was developed using the Eclipse Ditto, which has been commonly used as the standard open hardware platform for digital twin. In particular, each factor is communicating with the client, IoT gateway, and server by defining the message sequence such as initialization and data transmission. In this paper, we describe the digital twin technology trend and major platform. The proposed design has been tested in a testbed of the lab-scale vertical smart-farm. The sensor data is received from 1 Jan to 31 Dec 2020. In this paper, a prototype digital twin system that collects environment and control data through a raspberry pi in a plant factory and visualizes it in a virtual environment was developed.