• The Journal of the Korea Contents Association
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• v.19 no.7
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• pp.376-383
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• 2019

In recent decades, China's economy has grown rapidly and two-dimensional bar code-based payments services have been activated. This is a model that will be introduced by developing countries that lack mobile payment infrastructure, and countries that are looking to leap into cashless societies are also drawing attention. Along with this, the existing CRM market is expanding around the mobile device called m-CRM, and research is active on the importance of collective use for online advertising and two-dimensional bar code-based payments services. Therefore, through this study, we have explored the concepts and status of online advertising and customer relationship management which using the two-dimensional bar code-based system, and designed and implemented the method and mobile application system to effectively disseminate transactional advertising information at the point of sale or at the point of share. We also presented an application approach to look at the direction of two-dimensional bar code-based ads contents sharing system and its development.

• Journal of KIISE:Computing Practices and Letters
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• v.10 no.4
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• pp.293-298
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• 2004

To satisfy the requirements for QoS and acceptance ratio of the users using multimedia content service, it is required to control mechanism for QoS assurance and allocation of the stream server' resources based on CoS(Class of Service). To compare performance of the algorithm, we have classified the user by two classes (super class, base class) and control the acceptance ratio of user's requests by user's class information. We have experimented the test of network resources and test of processing time under server/client environment and agent environment. MA-URFA based on agent increases the acceptance ratio of super class and utilization ratio of network resources.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.528-536
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• 2009

Recently, the importance of IPTV providing multimedia service over IP based networks managed to provide the required level of quality of service and experience, security, interactivity and reliability has been gradually increasing by the commercialization of its service. However, the original purposes of IPTV service - contents are produced and consumed anytime, anywhere, and over any device at the same time - have not been satisfied by service providers because most services offered by service providers depend on closed IPTV platform. In this paper, we propose an open IPTV service platform that an individual or small company can easily produce contents and offer IPTV service independently from the existing closed IPTV platform.. The proposed IPTV platform exploits overlay multicast scheme to offer reasonable service under the environment where network bandwidth and processor resource are limited. It also uses CDN-like scheme to ensure the quality of transmitted contents. The performance evaluation shows that the proposed IPTV platform has the possibility of being an open IPTV platform considering its results such as the quality of transmitted contents, the transmission rate, the channel zapping time, and so on. It also shows that proposed IPTV platform could be applied to real IPTV service with continuous enhancement of its functions and user interfaces.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.1
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• pp.51-63
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• 2013

Recently with base apply MANET with the application for the service discovery and delivery which are various techniques are being proposed the result of such MANET base research techniques from actual inside. This dissertation proposes T-Chord(Trustworthy-based Chord) Ring system for MANET to guarantees from such requirements. T-Chord Ring system in order to manage Efficiently the services which the mobile nodes provide is the service discovery system which uses P2P overlay network Technique in mobile environment. The system which is proposed MANET communications in order to accomplish a service discovery operation with physical network class and logical network class will be able to minimize problems from about MANET service discoveries, and uses the dispersive hash table technique for a service discovery and effectiveness of service discovery improves and will be able to guarantee the expandability of network size. The mobile nodes(mobile device) have a mobility from MANET and operate with service request node, service provide node and service transmit node. The mobile nodes will be able to elect cluster header using Trustworthy that was evaluated service request, provision and delivery in each other. The system which is proposed a service discovery and a delivery efficiently will compose the cluster head which will grow of P2P overlay networks and will be able to accomplish. The system which proposes from dissertation is composed of Trustworthy evaluations of MANET mobile nodes, service information collection which is dispersed and P2P overlay networks that composed of Chord algorithm modules which provide O(Log N) efficiencies. The system comparison evaluation analyzes an efficiency from the expandability side of effectiveness and the network of service discovery technique and the service discovery message over head, service discovery and delivery of former times and service discovery and delivery is excellent gives proof from MANET.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.17 no.4
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• pp.115-129
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• 2007

The ubiquitous and autonomic computing environments is open and dynamic providing the universal wireless access through seamless integration of software and system architectures. The ubiquitous computing have to offer the user-centric pervasive services according to the wireless access. Therefore the roaming services with the predefined security associations among all of the mobile devices in various networks is especially complex and difficult. Furthermore, there has been little study of security coordination for realistic autonomic system capable of authenticating users with different kinds of user interfaces, efficient context modeling with user profiles on Smart Cards, and providing pervasive access service by setting roaming agreements with a variety of wireless network operators. This paper proposes a Roaming Coordinator-based security management framework that supports the capability of interoperator roaming with the pervasive security services among the push service based network domains. Compared to traditional mobile systems in which a Universal Subscriber Identity Module(USIM) is dedicated to one service domain only, our proposed system with Roaming Coordinator is more open, secure, and easy to update for security services throughout the different network domains such as public wireless local area networks(PWLANs), 3G cellular networks and wireless metropolitan area networks(WMANs).

• Proceedings of the Korean Information Science Society Conference
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• 2003.10c
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• pp.274-276
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• 2003

UDDI는 웹 서비스를 위한 웹 기반 분산 레지스트리의 표준이며, 또한 비즈니스들이 제공하는 웹 서비스에 대한 정보를 등록하고 다른 비즈니스들이 이를 검색하고 이용할 수 있도록 구현한 시스템이다. UDDI에 의해 관리는 유용한 정보는 다수의 호스트 상에 복제되어 제공됨으로써 가용성과 신뢰성을 높일 수 있다. 본 논문에서는 그룹통신 기반의 UDDI 레지스트리 개발에 관하여 기술한다. 제안된 시스템은 신뢰성 있는 그룹통신 시스템을 이용하여 일시적인 네트워크 단절이나 프로세스의 실패가 일어나는 상황에서도 UDDI 서비스에 참여하는 개별 노드들의 레지스트리 상태를 일관성 있게 유지할 수 있다.

• Information and Communications Magazine
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• v.21 no.8
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• pp.29-42
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• 2004

통신기술 발전의 한 측면을 살펴보면 TMN을 통한 이종 장비의 관리, 망의 통합을 통한 비용의 절감, 신규서비스 개발에 의한 수익 창출을 목표로 해왔다고 볼 수 있다. 광대역 통합망은 현재 독립적인 망이 갖고 있는 한계를 극복하고 음성, 데이터, 방송 등 모든 서비스를 하나의 네트워크로 연결하여 미래 출현할 품질 보장형 멀티미디어 서비스를 언제 어디서나 끊김 없이 안전하게 제공할 수 있는 정보통신 인프라로 정의할 수 있다.(중략)

• Annual Conference of KIPS
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• 2013.11a
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• pp.417-420
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• 2013

고혈압과 당뇨와 같은 만성질환은 장기적인 관리가 필요하다. 최근 주목받고 있는 폐쇄형 SNS 시스템 설계를 통해서 동일한 질병을 가지고 있는 그룹간의 커뮤니케이션을 활성화하여 자유로운 게시글을 통해서 환자 맞춤형 건강정보를 발굴하고 공유하는 시스템을 안드로이드 어플리케이션을 통해서 구현하였다. 본 서비스를 통해서 건강정보 공유 서비스 연구가 활성화될 것으로 기대한다.

• Annual Conference of KIPS
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• 2010.04a
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• pp.206-209
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• 2010

본 논문에서는 세션 관리 기술, 네트워크 제어 기술, 동시성 제어 기술, 미디어 제어 기술 중에서 식품 안전 서비스를 위한 IP-USN 기반의 멀티미디어 응용 개발 프레임워크에서 네스티드 세션의 미디어 객체 제어에 대하여 기술한다. 네스티드 세션이란 하나의 부모 세션 아래에 여러 개의 자식 세션이 존재하는 것을 말한다. 제안하고자 하는 미디어 제어는 식품 안전 서비스를 위한 IP-USN 기반의 멀티미디어 응용 개발 프레임워크에서 미디어를 하나의 메시지로 취급한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.189-194
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• 2002

It is thesis that based on for Croup-Transferring a method of Transferring-Control during real-time. By the development of multimedia, spread of high-speed communication network and generalization of various multimedia services, various techniques an studied by requiring application services for multi-users (meeting-service, remote-service, broadcasting-service, education-service and so on). So we focused on the multimedia group transferring techniques except communication network techniques and multimedia processing techniques, and presented algorithms about a mettled of group-management, a method of delay-control-management that analyzed a effective method of Croup-Control and characters of each group network and used RTP(Real-Time Protocol) / RTCP(Real-Time Control Protocol).