• Proceedings of the KIEE Conference
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• 2006.10c
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• pp.443-445
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• 2006

In this paper, we present a model-driven approach to RTOS(Real Time Operating System)-based embedded software development and an automated tool that can produce RTOS-specific code. we defined generic RTOS APIs(Application Programming Interface) that are not bound to any specific RTOS but can provide most of typical RTOS services. The generic RTOS APIs can be used as a means for describing application's RTOS-related behavior from design stage. Out tool, called Trans-PI, is able to produce specific 'C' code aimed at POSIX(Portable Operating System Interface for UNIX)-complicant RTOSs. And it is also configurable to target other RTOSs that do not conform to the POSIX standard.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.39 no.7
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• pp.660-665
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• 2011

Reconfigurable Flight Simulator for an airborne tactical mission based on virtual reality technology is developed as a software configurable cockpit with computer display as virtual instruments. It can simulate F-15K, KF-16, T/A-50 class fighter and depending on simulated cockpit, control stick and throttle are replaceable. For effective immersion, Video See-Through type HMD is applied.

• Proceedings of the IEEK Conference
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• 2002.07b
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• pp.936-939
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• 2002

FPCA is the necessary device to design of hardware at present, it is researched on many ways of applying to design caused by expansion of capacity in recent years. One of these applying ways is SoC (System on a Chip) that is proposed for realizing the basic function of a system. For realizing SoC efficiently, IP (Intellectual property) is very important and developed for re-use of hardware. A MPU for built-in exists as an IP. But almost of MPUs at present as an IPs are lengthy and large-scale for using embedded-application. Furthermore, the function of executing specific treatment critically is required to embedded MPU. We propose a flexible and small scale MPU and its design method.

• Journal of information and communication convergence engineering
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• v.8 no.6
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• pp.671-676
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• 2010

In this paper, an effort has been made to design and develop a meteorological data logger for meteorological purpose. This data logger is proposed to be included various sensor interface that used in weather sensors. Besides, numbers of meteorological process libraries are added into this data logger to make it able to perform as unattended weather monitoring system. Data output of this data logger are also design to support multiple protocol that commonly used in data logger, and several communication devices that commonly used in the market. Each data that logged will be logged together with date and time and able to retrieve via serial port using hyper terminal. It is also configurable via serial port.

• Journal of Information Processing Systems
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• v.14 no.5
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• pp.1286-1292
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• 2018

To support and protect firefighters in the scene of disaster, this research suggests an Internet of Things (IoT) system architecture that can be configurable and applicable to firefighting and rescue in various disaster situations. The proposed approach provides increased adaptability and reusability of systems compared to existing approaches. To validate the feasibility of the approach, a system of systems based on the architecture was developed and successfully tested for a specific firefighting and rescue scenario in a given test environment.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06a
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• pp.355-357
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• 2006

반도체 공정의 발달로 인해 하나의 칩에 많은 양의 소자를 넣는 것이 가능해지면서 상대적으로 넓어진 공간에서 캐시 메모리가 차지하는 공간의 비중이 증가하고 있다. 상대적으로 비중이 커진 캐시 메모리는 CPU가 소모하는 전력의 50%에 상당하는 전력을 소모하는 등 시스템의 성능뿐만 아니라 전력 소모에도 큰 영향을 주고 있다. 현재 시스템 성능 향상과 전력 소모 절감을 위하여 캐시 메모리의 논리적 구조를 개선하기 위한 많은 연구가 진행 중이다. 본 논문에서는 다양한 용도로 사용되는 범용 시스템이 아닌 특정 응용분야에 최적화되어 사용되는 소규모 임베디드 시스템에 적합한 직접사상캐시를 위한 재구성 가능한 백업캐시를 제안하려고 한다. 제안하는 백업 캐시는 특정 레지스터 값을 이용해서 백업캐시를 재구성 가능하게 하여 응용분야에 따라 직접사상캐시의 성능 향상과 전력소모를 절감하도록 하여 시스템의 성능향상과 전력소모를 절감시키는 역할을 할 것이다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.5 no.3
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• pp.508-522
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• 2011

Femtocell is an economical solution to provide high speed indoor communication instead of the conventional macro-cellular networks. Especially, OFDMA femtocell is considered in the next generation cellular network such as 3GPP LTE and mobile WiMAX system. Although the femtocell has great advantages to accommodate indoor users, interference management problem is a critical issue to operate femtocell network. Existing OFDMA resource management algorithms only consider optimizing system-centric metric, and cannot manage the co-channel interference. Moreover, it is hard to cooperate with other femtocells to control the interference, since the self-configurable characteristics of femtocell. This paper proposes a novel interference-aware resource allocation algorithm for OFDMA femtocell networks. The proposed algorithm allocates resources according to a new objective function which reflects the effect of interference, and the heuristic algorithm is also introduced to reduce the complexity of the original problem. The Monte-Carlo simulation is performed to evaluate the performance of the proposed algorithm compared to the existing solutions.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.93-96
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• 2002

The manufacturing paradigm has shifted dramatically over the past decade from “push” or mass production mode to “pull” or customer-driven, order-based manufacturing mode, as multitudes of customers now demand mass customization of configurable products. As a means to achieve such rapidly responsive manufacturing system, Advanced Planning System (APS) has become an essential software tool for achieving modern “build-to-order” and “configure-to-order” manufacturing environment. APS enables manufacturers to respond to variety of customer demands In real time by instantly configuring manufacturing processes based on specifications described in each purchase orders and providing capable-to-promise information directly to customer by performing rapid “what-if” manufacturing simulated scenarios. This paper discusses the working of such system as well as the business processes that incorporate such systems to enable efficient “build-to-order” environment.

• Journal of the Korea Society for Simulation
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• v.7 no.2
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• pp.1-16
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• 1998

This paper presents an automated methodology for campus network design and performance analysis using the rule-based SES and DEVS modeling & simulation techniques. Proposed methodology for structural design and performance analysis can be utilized not only in the early stage of network design for selecting configurable candidate from all possible design alternatives, but also in simulation verification for generating performance data. Our approach supercedes conventional methodologies in that, first, it can support the configuration automation by utilizing the knowledge of design expert ; second, it can provide the simulation-based performance evaluation ; third, it is established on the basis of the well-formalized framework so that it can support a hierarchical and modular system design. Several simulation tests performed on a campus network example will illustrate our technique.

• Proceedings of the IEEK Conference
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• 2002.06a
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• pp.235-238
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• 2002

In this paper we describe the design and implementation of Electrical Ground Support Equipment(EGSE) for the CBS transponder testing. The main task of EGSE is to check out satellite systems, at system or subsystem level, during integration and validation phases of their life-cycle. Through a combination of hardware and software elements, EGSE supports manual, semi-automatic and fully automated testing. Automation is achieved by offering users simple, yet powerful means to write their own test application programs (test sequences) in high-level, test-oriented language and to run them in a strict real-time environment. The core of this environment is a user-configurable real-time database, containing all the information needed to calibrate acquired data, check them against predefined thresholds, automatically react to out-of-range conditions, display data using animated graphics or synoptic windows, and so on.