• 한국컴퓨터산업학회논문지
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• 제3권1호
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• pp.117-124
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• 2002

소프트웨어 개발에 적합한 설계는 하나 이상 존재할 수 있고, 소프트웨어 아키텍쳐는 설계 과정 동안 수정, 갱신, 대체로 인해 변경될 수 있으므로, 다양한 관점에서 설계된 아키텍쳐의 서로 다른 버전들을 유지 관리 할 수 있는 방법과, 아키텍쳐의 변경 요소들을 효율적으로 명세할 수 있는 방법이 요구된다. 이 연구에서는 기존에 이미 정의되어 있는 아키텍쳐와, 이를 재사용하여 설계한 새로운 아키텍쳐를 통합된 구조의 소프트웨어 아키텍쳐로 재구성할 수 있는 방법과, 재구성 아키텍쳐 명세에 필요한 명세 요소와 명세 구조에 대해 정의하고 있다. 제안된 통합된 구조의 명세 방법은 아키텍쳐 설계 과정에서 다양한 개발자 관점 에서 정의된 아키텍쳐들을 참조 및 재사용할 수 있는 방법을 제공하고, 아키텍쳐의 수정, 대체, 갱신과 같은 변경 요소에 대해 유연성 있는 명세 방법을 제공한다.

• 한국컴퓨터산업학회논문지
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• 제3권3호
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• pp.341-350
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• 2002

소프트웨어 아키텍쳐는 설계 과정 동안 수정, 갱신 그리고 대체로 인해 재구성될 수 있으며, 소프트웨어 개발에 적합한 설계는 하나 이상 존재할 수 있기 때문에 다양한 관점에서 설계된 아키텍쳐를 재구성할 수 있는 방법과 아키텍쳐의 변경 요소들을 효율적으로 명세할 수 있는 방법이 필요하다. 이 논문에서는 기존에 이미 정의되어 있는 아키텍쳐와 이를 재사용하여 설계한 새로운 아키텍쳐를 통합된 구조의 소프트웨어 아키텍쳐로 재구성할 수 있는 방법을 제안하였다. 그리고, 통합된 구조의 소프트웨어 아키텍쳐 명세에 필요한 명세 요소와 명세 구조를 제안한다. 제안한 통합된 구조의 명세 방법은 아키텍쳐 설계과정에서 다양한 개발자 관점에서 정의된 아키텍쳐들을 참조 및 재사용할 수 있는 방법을 제공하고, 아키텍쳐의 수정 및 갱신 그리고 대체와 같은 변경 요소에 대해 유연성 있는 명세 방법을 제공한다.

• Journal of Power Electronics
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• 제14권6호
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• pp.1281-1292
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• 2014

Photovoltaic (PV) solar systems with series-connected module integrated converters (MICs) are receiving increased attention because of their ability to create high output voltage while performing local maximum power point tracking (MPPT) control for individual solar panels, which is a solution for partial shading effects in PV systems at panel level. To eliminate the partial shading effects in PV system more effectively, sub-MICs are utilized at the cell level or grouped cell level within a PV solar panel. This study presents the results of a series-output-connection MPPT (SOC-MPPT) controller for sub-MIC architecture using a single sensor at the output and a single digital MPPT controller (sub-MIC SOC-MPPT controller and architecture). The sub-MIC SOC-MPPT controller and architecture are investigated based on boost type sub-MICs. Experimental results under steady-state and transient conditions are presented to verify the performance of the controller and the effectiveness of the architecture.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.850-853
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• 2005

This paper presents issues of display hardware architecture, relating to memory, display driver IC architecture, and chip-to-chip interface. To achieve a low power and low cost mobile phone, not only the display architecture must be carefully selected, but also the driver-ICs optimized to accommodate the different modes of operation found in typical handheld devices. The technique of forming a photo sensor in each pixel using TFT and display module architecture are developed to add multi functions in display such as fingerprint recognition, image scanning, and integrated touch screen. Detailed architectures of IC partitioning, high-speed serial interface, D/A converter, and multi functions such as fingerprint recognition and image scanning using photo sensors are important to a power optimized system.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -3
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• pp.1823-1826
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• 2002

On modern computer culture, the high quality data is required in multimedia systems. So, the technology of data compression fur data transmission is necessary now. This paper presents the pipeline architecture for the low and column address generator of 2D DCT/IDCT (Discrete Cosine Transform/Inverse Discrete Cosine Transform. In the proposed architecture, the area of hardware is reduced by using the DA (distributed arithmetic) method and applies the concepts of pipeline to the parallel architecture. As a result the designed pipeline of the low and column address generator for 2D DCT/IDCT architecture is implemented with an efficiency and high speed compared with the non-pipeline architecture.

• ETRI Journal
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• 제35권4호
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• pp.666-676
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• 2013

With the recent growth in smartphone services, the "mobile" environment has become a key factor to consider in the design of the future Internet. In this paper, we propose Mobile-Oriented Future Internet (MOFI), which is a new architecture for the future Internet for mobile-oriented environments. The MOFI architecture is designed with three functional features: global identifier and local locator in the identifier-locator separation, query-first data delivery for route optimization, and distributed control of identifier-locator mapping. The proposed architecture and functional operations are implemented and tested using the Linux platform. From the experiment results, we see that the MOFI architecture performs better than the existing identifier-locator separation schemes, such as Proxy Mobile IP and Host Identity Protocol, in terms of data throughout, mapping control overhead, and handover delay.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권2호
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• pp.313-329
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• 2011

To provide a seamless network to customers, Internet service providers must promptly detect and control abnormal traffic. One approach is to shorten the traffic information measurement cycle. However, performance degradation is inevitable if traffic measurement servers merely shorten the cycle and measure all traffic. This paper presents a software architecture that can measure traffic more frequently without degrading performance by estimating the level of abnormal traffic. The algorithm in the architecture estimates the values of the interface group objects in MIB by using the IP group objects thereby reducing the number of measurements and the size of measured data. We evaluated this architecture on part of Internet service provider's IP network. When the traffic was measured 5 times more than before, the CPU usage and TPS of the proposed scheme was 7% and 41% less than that of the original scheme while the false positive rate and false negative rate were 3.2% and 2.7% respectively.

• ETRI Journal
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• 제41권4호
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• pp.452-464
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• 2019

The use of wireless body area networks (WBANs) in healthcare applications has made it convenient to monitor both health personnel and patient status continuously in real time through wearable wireless sensor nodes. However, the heterogeneous and complex network structure of WBANs has some disadvantages in terms of control and management. The software-defined network (SDN) approach is a promising technology that defines a new design and management approach for network communications. In order to create more flexible and dynamic network structures in WBANs, this study uses the SDN approach. For this, a WBAN architecture based on the SDN approach with a new energy-aware routing algorithm for healthcare architecture is proposed. To develop a more flexible architecture, a controller that manages all HUBs is designed. The proposed architecture is modeled using the Riverbed Modeler software for performance analysis. The simulation results show that the SDN-based structure meets the service quality requirements and shows superior performance in terms of energy consumption, throughput, successful transmission rate, and delay parameters according to the traditional routing approach.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 학술대회지
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• pp.532-535
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• 2004

Architecture generation is the first step in the design of software systems. Most of the qualities that the final software system possesses are usually decided at the architecture development stage itself. Thus, if the final system should be usable, testable, secure, high performance, mobile and adaptable, then these qualities or non­functional requirements should be engineered into the architecture itself. In particular, adaptability is emerging as an important attribute required by almost all software systems. The machinery and tools in the remote site surveillance and connects intelligence information machinery and tools at Internet. We need the server which uses different embedded operating system to become private use. With the progress of information-oriented society, many device with advanced technologies invented by many companies. However, the current firmware technologies have many problems to meet such high level of new technologies. In this paper, we have successfully ported linux on an embedded system, which is based on intel StrongARM SA-1 1 10 processor, then written several network modules for internet-based network devices.

• 정보처리학회논문지C
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• 제9C권3호
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• pp.323-330
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• 2002

멀티캐스트 서비스들이 점차 다양해지고, 서비스 사용자의 폭도 넓어지고 있다. 이에 비례하여 공격자들의 주목을 받게되고 정보의 누출 가능성도 높아진다. 따라서 멀티캐스트 서비스 활용과 동시에 그에 대한 보안 연구도 함께 이루어져야 한다. 본 논문에서는 멤버의 동적인 가입 탈퇴가 발생하는 그룹에서 효율적인 그룹 관리를 적용하여 안전한 멀티캐스트 서비스를 제공할 수 있는 구조를 제안한다. 제안한 구조는 한 명의 송신자와 다수의 수신자로 구성된 멀티캐스트 통신 상황에서, 보안 측면을 고려하여 많은 이용자들에게 안전한 멀티캐스트 서비스를 제공할 수 있다. 시뮬레이션을 통하여 기존의 구조와 성능을 비교·분석한 결과, 제안하는 구조는 멤버 관리가 효율적이고, 전송 지연을 줄이면서 보다 안전하게 데이터를 전송할 수 있다는 것을 알 수 있었다.