• 한국시뮬레이션학회논문지
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• 제14권1호
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• pp.33-42
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• 2005

Service Level Agreement (SLA) is a service providing scheme by a service class agreement between a user and a service provider SLA allows that a user can select an expected service class in various service classes provided from a service provider. Recently, SLA management is adapted to support the end-to-end Qos for service users in Beyond 3 Generation (B3G) networks. In B3G networks, SLA provides multiple service classes on access networks so that service classes should be managed to assure the service satisfaction for users. In this paper, we propose a dynamic Qos management scheme by IP traffic class controlling based on SLA in B3G networks. Also, to manage dynamic traffic service, we consider Differentiated services (Diffserv) mechanism for the resource management by SLA. An If service traffic class on SLA can be dynamically changed by Diffserv traffic management to support dynamic end-to-end Qos. Hence, in this paper, we consider the buffer threshold scheme for controlling traffic loads and the traffic level control scheme for implementing the dynamic traffic management by the SLA.

• 전자공학회논문지A
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• 제30A권3호
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• pp.1-15
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• 1993

In this paper, we propose over-reporting avoidance scheme which avoids congestion of network traffics by adjusting managed system's over-reporting, on the OSI network management model which reports events from managed system to managing system. In case of reporting events from managed system to managing system, management traffic concentration occurs, and it causes over-loading on the managing system and congestion on the network. This scheme takes advantage of feedback from managing system to managed system. Managed system transmits event reports as much as maximum event pertime allocated to itself to managing system, and it sets it's management variables to LOCK state and stops event reports as Threshold time is reached. At the time, managing system directs event reports again by using M-set primitive with referring it's status. With this scheme, distributed processing, dynamic network adaptation, convergence of optimal operation point is possible. In addition to it, a fairness is assured. In order to detect characteristics of the Unary feedback over-reporting avoidance scheme. It is observed a control capability of the event reporting and fairness of each nodes through measuring. ThresholdTime value. It is measured a number of mean activating nodes and maintained time of LOCK state according to event reporting load, and also measured lost ratio of management packet, queuing delay in managing system, and goodput to observe effects of general packet load. Binary feedback scheme. Unary feedback overreporting avoidance scheme and raw scheme on the OSI network management system each are compared and analyzed, and finally proved that the scheme proposed in this study performs better.

• ETRI Journal
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• 제27권1호
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• pp.114-117
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• 2005

In this paper, we propose a key management scheme which can provide delivery of the key used to encrypt a digital content from the package server to digital rights management (DRM) clients in a secure manner. The proposed scheme can protect digital content from attacks since an encrypted digital content is sent by a package server and only DRM clients can decrypt the encrypted digital content. It protects the key not only from purchasers but also among the other principals who manage the distribution and license servers.

• 한국멀티미디어학회논문지
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• 제19권11호
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• pp.1871-1877
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• 2016

In this paper, a Wireless USB (WUSB) protocol is adopted for development of ASMD (Adaptive Source Multi Device) N-screen wireless services. WUSB is the USB technology merged with WiMedia PHY and Distributed-MAC (D-MAC). However, the current WUSB protocol can't provide seamless N-screen streaming services to moving WUSB devices in home network environment. Therefore, to provide the ASMD N-screen services through WUSB based on D-MAC protocol, a channel management scheme is proposed to support seamless mobility between adjacent ASMD groups for wireless IPTV N-screen services. In simulation results, proposed ASMD channel management (ACM) scheme is compared with conventional WUSB channel management scheme in view points of throughput, average path interference and energy consumption according to various numbers of nodes and elapsed simulation times. Through simulation results, it is explained that proposed ASMD channel management (ACM) scheme should be adopted in the WUSB protocol to realize ASMD N-screen wireless services.

• International Journal of Advanced Culture Technology
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• 제1권2호
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• pp.7-12
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• 2013

Mobility management is an important issue in Mobile Ad Hoc Networks (MANETs) because location information of mobile nodes is frequently changed and it aggravates the performance in MANETs drastically. In this paper, we propose a fuzzy logic based mobility management scheme using group quorum system by considering the mobile nodes' locality in order to manage location information of mobile nodes in MANETs efficiently. The proposed scheme selects mobility databases adaptively from group quorum system by considering the degree of locality of a mobile node. The performance of the proposed scheme is evaluated by an analytical model and compared with that of existing mobility management scheme.

• 가정과삶의질연구
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• 제20권5호
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• pp.69-85
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• 2002

The purpose of this study was to develop a scheme to standardize apartment management expenses levy. I have conducted theoretical research on the literature for the foundation of this study. I have also surveyed many different kinds of levies with help from several apartment complex managers in Busan as well as the executive secretaries of Busan Citizen's Coalition for Economic Justice. I held 30 meetings with the experts in this process to discuss the standardization of the levy. The finalized scheme for standardization is in line with the Act for Management of Multiple Family Housing. Because description of the whole standardized scheme is too lengthy for one article, I decided to present it in three parts. This article is the first part of the series. The remaining two parts will be published in future issues.

• Journal of Information Technology Applications and Management
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• 제24권1호
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• pp.63-79
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• 2017

This study is a subsequent research results of Lee and Hwang (2015) and presents results of the case in which an information system is developed and applied for the performance management scheme proposed by the early study. This study aims to provide the organizations that want to implement and apply an effective IS operational performance management scheme with the practical alternatives that they may consider. This study first summarize the major contents of the performance management scheme proposed by the early study. Then, the processes and detailed contents in which an information system is developed in order to operate and improve the performance management scheme. The specific contents provided by the study include the system development environments and methods, system architecture, and application structure. Finally, this study summarizes the major results of the study and suggests future research directions.

• 한국정보과학회논문지:정보통신
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• 제30권1호
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• pp.48-64
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• 2003

최근 이동 단말 사용자의 폭발적인 증가로 인해 이동 통신 시스템에서 이동 단말 사용자의 위치 추적을 위한 위치 관리가 중요해지고 있다. 그러나, 이전의 위치 관기 기법들은 사용자의 이동 방향에 대한 고려 없이 정적인 이동 정보만을 사용하고 있다. 이러한 기법들은 불필요한 페이징을 초래하고, 결과적으로 위치 관리 비용을 증가시켰다. 본 논문에서는 이동 단말 사용사의 이동 특성을 고려한 새로운 위치 관리 기법을 제안한다. 제안하는 기법에서는 사용자의 이동성을 표현하는 방향 벡터를 정의하고 위치 등록이 발생한 셀로부터의 거리를 계산하기 위해 방향 벡터를 사용된다. 또한 방향 벡터의 상쇄 연산에 의해서 위치 등록의 수행 여부를 결정한다. 따라서, 사용자의 이동 방향 특성에 따라 사용자의 위치 영역이 동적으로 생성되며 페이징 영역의 폭도 동적으로 결정된다. 게다가, 본 논문에서는 제안하는 기법의 분석 모델을 제시한다. 비교를 위해서 거리 기반 기법을 또한 분석하였다. 수치적 분석 결과는 매우 낮은 CMR의 경우를 제외한 대부분의 경우에서 거리-기반 기법보다 효율적임을 보여준다. 특히, 사용자가 특정 방향으로 이동할수록, 제안하는 기법은 거리-기반 기법보다 낮은 위치 관리 비용을 갖는다.

• 제어로봇시스템학회논문지
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• 제22권7호
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• pp.570-577
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• 2016

This paper proposes the design of a novel distributed message management scheme using a message-oriented management and analysis tool (MOMAT) for naval combat system (NCS) middle-ware. If a message is not guaranteed real-time of the NCS with each node, it causes the loss of data and decreases the reliability of systems. To solve these problems, improved message management schemes are proposed. Message management schemes are considering a real-time user management scheme and a real-time traffic management scheme. The proposed schemes are simulated with a developed simulation tool, data publisher, and subscriber connected through nodes in middle-ware. The simulation results show improved results in terms of message round-trip time (RTT), End-to-End delay, and throughput.

• Journal of the Korean Institute of Landscape Architecture International Edition
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• 제2호
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• pp.206-209
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• 2004

A requirement of park management is to transfer the focus from emphasizing the management of public materials to providing services to visitors. Therefore, it has become indispensable to create a scheme in which residents can take management initiative. At this time, we look at Hyogo Prefectural Arimafuji Park, which encourages citizen management participation, and try to understand their system and project contents. For an initial scheme, we identify 4 elements that promoted subjective participation in a council style scheme; 1. to begin activities at the earliest possible time before opening the park, 2. to coordinate with expert(s) who take a neutral position, 3. to have places available where participants can debate on an equal footing, and 4. to plan the project while feeding back actual results.