• Journal of Korea Multimedia Society
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• v.3 no.6
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• pp.557-565
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• 2000

According to CORBA specification, there are some mechanisms for object reference management such as Naming Service and Trading service, but these mechanism cant's supply all functionalities needed fomanagement in MICS. So, We have designed and implemented additional special-purpose IPO manager. It provides load balancing service based on real-time information for IPO and fault-tolerable services with the management of redundant IPOs and also provides transparent configuration of client environment with the lists of registered IPOs.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.601-606
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• 2011

There are lots of examples for naming railway lines and stations in Korea. In general, we can specify some type of principles for making names at the railway lines. The first, rail line name made some decision considering the origin and destination name of city or region. The second type of a decision making is the location or service areas of that railway line or station. And other one is about the destination city or region of that corridor line. In this paper, we classified the name of the railway line according to above three types of decision principles, and then suggested the guideline and future directions preventing any confusion to make a new railway line name afterwards.

• The KIPS Transactions:PartC
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• v.8C no.1
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• pp.23-31
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• 2001

Current CORBA has been suggested a solution for complexity of software in distributed environment. But it can't provide reliability about data transfer. For instance, CORBA can't provide object to client when the network are unstable or congested. In an existing CORBA, client has to wait when there is congestion between client and object implementation while client get a service from object implementation. So In this paper, we propose Fault-Tolerant CORBA Service (FTS) which has an intelligent redirection about an object that client requests. Moreover, we designed and implemented Fault-Tolerant Service to provide reliability by extending existing CORBA ORB. Therefore it provides reliable connection throughout the proposed Fault-Tolerant Service.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.10 no.1
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• pp.38-57
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• 2016

Service discovery is one of the major challenges in cloud computing environment with a large number of service providers and heterogeneous services. Non-uniform naming conventions, varied types and features of services make cloud service discovery a grueling problem. With the proliferation of cloud services, it has been laborious to find services, especially from Internet-based service repositories. To address this issue, services are crawled and clustered according to their similarity. The clustered services are maintained as a catalogue in which the data published on the cloud provider's website are stored in a standard format. As there is no standard specification and a description language for cloud services, new efficient and intelligent mechanisms to discover cloud services are strongly required and desired. This paper also proposes a key-value representation to describe cloud services in a formal way and to facilitate matching between offered services and demand. Since naïve users prefer to have a query in natural language, semantic approaches are used to close the gap between the ambiguous user requirements and the service specifications. Experimental evaluation measured in terms of precision and recall of retrieved services shows that the proposed approach outperforms existing methods.

• The Transactions of the Korea Information Processing Society
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• v.5 no.1
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• pp.128-136
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• 1998

TTCN(Tree and Tabular Combined Notation), as an international standard, provides a concept and notation to describe a protocol test specification. In this paper, we explain some considerations on each components of Abstract Test Suite and propose naming conventions for Constraints and Test Cases based on the experience of describing Test Suite for real protocol. We also analyze some problems on real application of Test Suite and propose an approach to avoiding such problems in the stage of Test Suite specification. In this paper, we use the SSCOP(Service Specific Connection Oriented Protocol) protocol, that is a sub-layer of ATM Forum UNI 3.1 protocol stack, as an example to proposals on naming conventions on Constraints and Test Cases.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10d
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• pp.184-189
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• 2007

물류유통분야에서는 SCM(Supply Chain Management)의 효율을 위하여 RFID 기술의 적용을 날로 확대하고 있다. 시대흐름에 편승하여 국방에서는 군수분야에 이 기술을 적용하고 있다. 군수물자 관리에서 필요성을 인식하고 국방탄약관리 시스템 구축사업, 신무기체계 자산관리 시스템 구축사업 등에 RFID 기술을 적용하였다. u-군수정보체계를 구축하기 위해서는 탄약뿐만 아니라 물자, 장비정비 RFID 시스템이 국방차원의 ONS(Object Naming Service) 및 DS(Discovery Service)와 연계되어야 비로소 군수물자 전체에 대하여 실시간으로 흐름을 파악할 수 있게 된다. 그러나 시범사업을 통하여 구축된 탄약 RFID 시스템이나 신무기체계 자산관리 시스템은 기관간 정보를 공유할 수 있도록 하는 국방차원의 ONS가 구비되어 있지 않고, 향후 구축할 계획을 가지고 있다. 따라서 본 논문에서는 EPCglobal 네트워크의 시사점 및 향후 추진 방향을 정리해 보고, 국방분야에서 RFID 시스템 도입사례와 향후 국방 RFID 추진방향, 국방 군수지원 개념을 고찰하였다. 그리고 군에 적합하고 인트라넷 환경에서 운영이 가능한 MND-ONS(Military and Defense) 시스템 구축방안을 제시하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.04a
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• pp.287-290
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• 2001

최근의 급속한 인터넷 성장에 힘입어 분산처리의 기술 및 환경은 인터넷을 기반으로 광역환경으로 확장될 전망이다. 이러한 환경은 사용자에게 보다 투명한 분산객체간의 효율적인 상호접속이 요구될 뿐 아니라, 광역환경에서 이름이나 속성에 의해 다양한 중복된 성질을 갖고 있는 객체들의 관리가 요구된다. 또한 광역 분산 환경에서 최적의 객체를 선정하는데 분산된 시스템들간의 부하분배를 고려하여 투명성을 제공하는 메카니즘이 필요하게 된다. 따라서, 본 논문에서는 광역분산 컴퓨팅 환경에서 광역 서비스를 지원할 수 있는 이름/속성기반의 중복객체들을 관리를 위한 통합 트리 구성방법을 제안한다. 그리고 이를 통한 혼합(네이밍/트레이더)된 위치서비스(Location service)를 이용하여 무수히 산제한 중복된 분산 객체들을 효율적으로 유지하고, 최적의 객체 선정을 통해 부하균형을 유지할 수 있는 방안을 제시한다.

• The KIPS Transactions:PartA
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• v.9A no.2
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• pp.241-248
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• 2002

With the structure of tilde-area computing system which Is specified by a researching team in Vrije University, Netherlands, lots of researchers and developers have been progressing the studies of global location and interconnection services of distributed objects existing in global sites. Most of them halve focused on binding services of only non-duplicated computational objects existing wide-area computing sites without any consideration of duplication problems. But all of objects existing on the earth rave the duplicated characteristics according to how to categorize their own names or properties. These objects with the same property can define as duplicated computational objects. Up to now, the existing naming or trading mechanism has not supported the binding services of duplicated objects, because of deficiency of independent location service. For this reason, we suggest a new model that can not only manages locations of duplicated objects In wide-area computing environments, but also provide minimum binding time by considering both the optimal selection of one of duplicated objects and load balance among distributed systems. Our model is functionally divided into 2 parts, one part to obtain an unique object handle of duplicated objects with same property as a naming and trading service, and the other to search one or more contact addresses by a node manager using a liven object handle, as a location service For location transparency, these services are independently executing each other. Based on our model, we described structure of wide-area integrated tree and algorithms for searching and updating contact address of distributed object on this tree. finally, we showed a federation structure that can globally bind distributed objects located on different regions from an arbitrary client object.

• Journal of Advanced Navigation Technology
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• v.13 no.5
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• pp.705-713
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• 2009

This paper proposes CORBA-based visual servoing system of humanoid robot. To effectively control the humanoid robot which is connected to network, it needs to define necessary services for visual servoing as distribution object, and realize them in the middleware. For realizing it following services should be addressed. Naming service for searching a necessary service with unique name assigned to each object, image service for supplying image obtained from stereo camera. In the experiment, we show the result of balloon tracking and bursting that the robot tracks balloons as target objects in the real time, and if a balloon stop for a certain time, then the robot bursts the balloon.

• Proceedings of the KAIS Fall Conference
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• 2011.12b
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• pp.529-532
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• 2011

Recently research efforts for ubiquitous technology that includes RFID(Radio Frequency Deification and sensor networks are conducted very actively The architectural framework of the USN sensor network discovery service. The survey of the USN technology is conducted on four technological visions that contain USN system technology USN networking technology and USN middleware along with the service platform, With respect to each technological division domestic and worldwide leading research projects are primarily explored with their technical features and research projects are primarily explored with their technical features and research outputs. Boasted on the result of the survey we establish a USN software model that includes data sensing, sensor data storage sensor data storage sensor data naming and sensor feed name service. This main objective of this model is to provide a reference model for the facilitation of USN application developments.