• Proceedings of the Korean Information Science Society Conference
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• 2011.06b
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• pp.305-306
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• 2011

The Wireless sensor networks (WSN) continuously generates large volumes of raw data which own natural heterogeneity. These networks are normally application specific with no sharing or reusability of sensor data among applications. In order for applications and services to be developed independently of particular network, sensor data need to be available in more standardized form. In this paper, we propose Architecture for Sensory data management. This Extensible Markup Language (XML) oriented architecture allows the sensor data to be understood and processed in a meaningful way by a variety of applications with different purposes. We developed a middle layer which performs transformation on raw sensory data to XML and vice versa.

• The Transactions of the Korea Information Processing Society
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• v.6 no.11S
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• pp.3299-3308
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• 1999

One of the most important prerequisites for a successful software process is the collaboration and software requirements negotiation of all stakeholders in the software development process. Remote users using computer networks can negotiate software requirements by computer supported system, and can share their informations. The goal of software requirements negotiation system is an integration of all win conditions and an agreement after resolution of conflicts. The existing systems need an exclusive system and must be dependent on specific platform and network. Users must have the knowledge of all stakeholder's status and use homogeneous collaborating applications. This paper presents the Web-based software requirements negotiation system for the purpose of resolution of the existing systems' problems. The Web-based software requirements negotiation system can be driven by WinWin Spiral model, and it is based on hybrid execution method. The proposed system is validated and tested on heterogeneous environments.

• Journal of Information Processing Systems
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• v.2 no.3 s.4
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• pp.170-177
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• 2006

Recently, RFID technology has attracted considerable attention in many industry fields. The RFID environment requires a standard architecture for the smooth exchange of data between heterogeneous networks. The architecture should offer an efficient standard environment, such as a communication environment based on Web Services, PKI or Kerberos-based security, and abstract business processes which could be used in the diverse domains. Therefore, in this paper, we propose an Enterprise Application Framework (EAF) which includes a standard communication protocol, security functions, and abstract level business processes. The suggested architecture is expected to provide a more secure and flexible security management in the dynamic RFID application environments, and is expected to provide an abstract business event for the development of business processes which could apply RFID technology to the existing systems.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.05a
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• pp.224-229
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• 1999

In distributed object oriented environment based upon wide heterogeneous network, effective cooperation policies between/among distributed objects are needed to resolve a complexity of management of distributed objects because of growing of a large stale of systems. Thus, in this paper, we propose three trading cooperation models between/among traders for supporting a high speed and a wide selection of trader service for clients, by considering three different cooperation models(light weight trader, simple negotiation and federation) depending upon their facilities, goals, and weights of goals.

• Journal of information and communication convergence engineering
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• v.9 no.2
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• pp.187-192
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• 2011

Traditional voice traffic over mobile communication has been changed into data and media contents traffic, which makes traffic amount increases and speedy data transfer required. In the near future ubiquitous mobile terminal environment will be common so that security issues will arise due to many heterogeneous equipments and connections. In this paper, many previous methods used for terminal authentication are examined. And we propose new system model which uses our novel user authentication protocol based on strong one-time password (OTP) and short message service (SMS). We verify our system model and protocol by implementation.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.1B
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• pp.17-21
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• 2007

In this paper, we propose new on-line processor management algorithms that manage heterogeneous multimedia services while maximizing energy efficiency. These online management mechanisms are combined in an integrated scheme for higher system performance and energy efficiency. The most important feature of our proposed scheme is its adaptability, flexibility and responsiveness to current network conditions. Simulation results clearly indicate the superior performance of our proposed scheme to strike the appropriate performance balance between contradictory requirements.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.1268-1269
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• 2007

차세대 이동통신 네트워크는 3G 진화망, 차세대 무선랜, WiMAX/WiBro 등 다양한 무선 접속 기술이 All-IP 기반 핵심망에 연결되어 통합되는 형태로 발전하고 있으며 무선 접속 기술의 커버리지에 따라 이기종 무선망이 중첩되어 운영될 수 있으나, 이에 대한 사항은 고려되고 있지 않은 상황이다. 이에 따라 4G 를 위한 차세대 네트워크와 현존하는 이기종 인터페이스를 지원하는 서비스 프레임워크가 요구되는 실정이다. 본 논문에서는 현재 사용되는 MIPv4 를 기반으로 하는 이기종 무선서비스 프레임워크를 위한 Hand-off 상황에 따른 패킷손실을 최소화 하는 방안을 제안한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1998.11a
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• pp.340-343
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• 1998

사설 ATM 스위치에서 인터넷이나 프레임 릴레이 등과 같은 이 기종 망 접속 장비들을 접속하기 위한 망 인터워킹 서비스를 수행하기 위하여 이들의 신호 및 연결 제어를 수행하기 위한 PSA(Proxy Signaling Agent)의 기능을 정의하고, PSA 신호 기능을 수행하기 위한 사설 ATM 스위치에서 수용 가능한 두 가지의 하드웨어 구조를 제안한다. 그리고 이 제안된 하드웨어 구조 상에서 PSA 기능을 수행하기 위한 신호 메시지 전달 방법을 알아보고, non-ATM 망 상의 서비스 이용자를 수용하기 위하여 PSA 기능을 수행하기 위한 ATM 주소 번역 기능, 서비스 대역 폭 할당 및 준비, 트래픽과 QoS 협상 등을 수행하는 PSA를 이용한 호 연결 설정 절차에 대하여 자세히 기술하고자 한다.

• Journal of information and communication convergence engineering
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• v.8 no.5
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• pp.479-483
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• 2010

The rapid progress of the Internet and network is affecting the engineering design environment as well as business that use Web technologies to enhance their competitive edge. In product development, experts and organization who take part in the design process are often geographically dispersed. Furthermore, different divisions and business often have heterogeneous CAD/CAE systems and methods for expressing product data, and addressing this heterogeneity creates additional costs and increases development time. Managing distributed CAD, CAE and other related systems in an organic and holistic manner from the initial stages of product development is imperative to ensure successful collaboration in the design process. Therefore, this study suggests a Web-based MDO framework to support interfacing and collective use of design and analysis tools.

• Journal of Communications and Networks
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• v.12 no.2
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• pp.181-190
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• 2010

A multitude of overlay network designs for resilient routing, multicasting, quality of service, content distribution, storage, and object location have been proposed. Overlay networks offer several attractive features, including ease of deployment, flexibility, adaptivity, and an infrastructure for collaboration among hosts. In this paper, we explore cooperation among co-existing, possibly heterogeneous, overlay networks. We discuss a spectrum of cooperative forwarding and information sharing services, and investigate the associated scalability, heterogeneity, and security problems. Motivated by these services, we design Synergy, a utility-based overlay internetworking architecture that fosters overlay cooperation. Our architecture promotes fair peering relationships to achieve synergism. Results from Internet experiments with cooperative forwarding overlays indicate that our Synergy prototype improves delay, throughput, and loss performance, while maintaining the autonomy and heterogeneity of individual overlay networks.