• Journal of Communications and Networks
• /
• v.9 no.4
• /
• pp.457-465
• /
• 2007

Native information provider(IP) anycast suffers from routing scalability issues and the lack of stateful communication support. For this reason, we propose architecture for scalable and transparent anycast services(ASTAS), a proxy-based architecture that provides support for stateful anycast communications, while retaining the transparency offered by native anycast. Dynamic resource assignment for each initiated session guarantees that a connection is established with the most suitable target server, based on network and server conditions. Traffic engineering in the overlay can be realized in an effective way due to the dissemination of aggregated state information in the anycast overlay. To minimize the total deployment cost for ASTAS architectures, we propose optimized proxy placement and path finding heuristics based on look-ahead information gathered in network nodes. Contrary to a regular integer linear program(ILP) formulation, these heuristics allow to optimize proxy placement in large networks. A use case on a European reference network illustrates that lower proxy costs enable proxy deployment closer to the end-users, resulting in a reduced network load.

• The KIPS Transactions:PartA
• /
• v.12A no.2 s.92
• /
• pp.161-170
• /
• 2005

Grid makes a virtual high-performance computing resource by connecting geographically distributed heterogeneous resources. Building access control system is an important factor In the grid environment In this paper, we design and implement a grid access control system based on Globus Toolkit, which is one of the popular grid middleware. Especially, to guarantee the site autonomy for resource provider, we use several environment configuration files. Moreover, we design and implement PGAM to produce more detail and diverse information to ease the development of value added services.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.15 no.12
• /
• pp.4364-4384
• /
• 2021

The dynamic network state and the mobility of the terminals make the service function chain (SFC) orchestration mechanisms based on static and deterministic assumptions hard to be applied in SDN/NFV mobile edge computing networks. Designing dynamic and online SFC orchestration mechanism can greatly improve the execution efficiency of compute-intensive and resource-hungry applications in mobile edge computing networks. In order to increase the overall profit of service provider and reduce the resource cost, the system running time is divided into a sequence of time slots and a dynamic orchestration scheme based on an improved column generation algorithm is proposed in each slot. Firstly, the SFC dynamic orchestration problem is formulated as an integer linear programming (ILP) model based on layered graph. Then, in order to reduce the computation costs, a column generation model is used to simplify the ILP model. Finally, a two-stage heuristic algorithm based on greedy strategy is proposed. Four metrics are defined and the performance of the proposed algorithm is evaluated based on simulation. The results show that our proposal significantly provides more than 30% reduction of run time and about 12% improvement in service deployment success ratio compared to the Viterbi algorithm based mechanism.

• ETRI Journal
• /
• v.24 no.4
• /
• pp.299-310
• /
• 2002

This paper describes an integrated network management framework for providing point-to-multipoint reservation service (PMRS) in an ATM network. There are two major issues confronting the network service provider in relation to this service: one is to rapidly confirm the acceptability of the subscriber's reservation at subscription time, and the other is to punctually activate the reserved point-to-multipoint service. To meet these requirements, we developed a service provision model (SPM) and a network resource model of a bandwidth allocation timetable (BATT). We propose a point-to-multipoint routing algorithm composed of ordering and backtracking procedures, which can find the best branch point under the complex network topology and can add more destinations to the existing point-to-multipoint route. We demonstrate the feasibility of the SPM, the BATT, and the point-to-multipoint routing algorithm by implementing our schemes and analyzing their performance under the operational ATM network of KT(Korea Telecom).

• Journal of Radiation Protection and Research
• /
• v.37 no.4
• /
• pp.173-176
• /
• 2012

Quality Management is a recent phenomenon. This is applied to products or services, with an objective to deliver high quality, reliable, worthy, enduring, product or service. The process is considered to have four main components: quality planning, quality control, quality assurance and quality improvement. Focusing on quality control and quality assurance leads to achieving quality management or ensures that an organization or product is consistent. In this paper, the applicable international standard for learning services and for the organization for education and training (learning service provider) is discussed and also the procedure to implement the management system.

• 한국IT서비스학회:학술대회논문집
• /
• 2008.11a
• /
• pp.175-178
• /
• 2008

With rapid advancement of IT and Internet technologies, online market is surely becoming a stage of the competition among various forms of platform providers. This study show the significance of the negotiation process in the platform pricing strategy and observe several external/internal factors that might affect the negotiation power of the identities surrounding the platform. Major theories used in this study are the resource-based-view and network theory. Resources resulting in a negotiation power of the content providers and platform providers turn out to be widely scattered in their business areas - from product characteristics to the size of the content provider. End-user (or buyer) group which cannot make a strategic move for the organized development and use of resources is taking advantage of network externalities to support its negotiation power.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.6 no.6
• /
• pp.461-467
• /
• 2005

The role of university is expanded from the human resource provider to demand site. The mission is also changed as a entrepreneurs. There is increasing in the needs of the university and industry cooperation(UIC), but cultural difference also happened. To successfully cooperation, we have to consider stakeholder's perspective and the size of companies and universities. Through the best c luster of innovation, we can figure out the key success factors of the universities, researchers, and leaders, and suggest the new characters for successful UIC.

• Journal of Digital Convergence
• /
• v.6 no.2
• /
• pp.65-76
• /
• 2008

Recently, software distribution method, along with advent of era of Web 2.0, is rapidly evolving from ASP(Application Service Provider) method into SaaS(Soft as a Service) method due to development in concepts and technologies including SOA(Service Oriented Architecture) Web Service, On Demand and Component. Determining factor in market competitiveness of newly emerging SaaS business model will be analyzed by focusing on Group-Wares, POS(Point of Sale) System, CRM(Customer Relationship Management) and ERP(Enterprise Resource Planning), which are the most representative SaaS business models in Korea. It is anticipated that the outcome of analysis of determining factors for market competitiveness for each of the main SaaS Business Models acquired through questionnaire survey can be utilized as important benchmarking material in setting the direction of cultivating SaaS market by the government as well as new entries into SaaS market.

• Knowledge Management Research
• /
• v.11 no.5
• /
• pp.37-57
• /
• 2010

This study has focused on the introduction each stages of ERP(Enterprise Resource Planning) implementation for an agricultural company's knowledge management & innovation. We have analyzed the company's background and found some conflicts and problems caused by the stockholders while implementing ERP systems. This case study has noted well how an agricultural company including between a provider and a stakeholder could be able to settle the ERP system with an necessary customizing work into the organization. Finally, ROSEPIA's implemented ERP systems have increased not only productivity but also archived the factuality and data reliability. This study give us an implication of how an export oriented and agricultural company, ROSEPIA made its company innovated and run its organizations through knowledge management using its ERP.

• Proceedings of the Korea Database Society Conference
• /
• 2001.06a
• /
• pp.427-437
• /
• 2001

중소기업의 경우 ERP (Enterprise Resource Planning) 시스템 구축은 비용부담 때문에 개별적인 구축이 용이하지 않다. 따라서, 본 연구는 중소기업들의 비용부담을 해소하기 위한 ASP (Application Service Provider) 기반의 ERP 시스템을 제시한다. 시스템 개발에 있어, 한국의 중소기업 업무 현실을 반영한 체계적인 구현에 주안을 두었으며, 또한, 리눅스 환경의 안정성에 대한 장점의 활용과 데이터의 보안성 확보에도 많은 노력을 기울였다. 제시한 시스템을 통해 향후, 중소업체의 의사결정 수준 제고 및 생산성 향상을 기대할 수 있다.