• 전기학회논문지
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• 제56권4호
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• pp.784-789
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• 2007

This paper presents an implementation of a new type of architecture to improve an overflow problem on the network buffer. Each receiver channel of network system stores the message in its own buffer. If some receiver channel receives many messages, buffer overflow problem may occur for the channel. This paper proposes a network controller that implements a receiver channel with shared-memory to save all of the received messages from the every incomming channels. The proposed architecture is applied to ARINC-429, a real-time control network for commercial avionics system. For verifying performance of the architecture, ARINC-429 controller is designed using a SOPC platform, designed by Verilog and targeted to Xilinx Virtex-4 with a built-in PPC405 core.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 D
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• pp.2075-2076
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• 2006

In this paper, we propose a new architecture of Genetic Algorithms(GAs)-based Backpropagation(BP). The conventional BP does not guarantee that the BP generated through learning has the optimal network architecture. But the proposed GA-based BP enable the architecture to be a structurally more optimized network, and to be much more flexible and preferable neural network than the conventional BP. The experimental results in BP neural network optimization show that this algorithm can effectively avoid BP network converging to local optimum. It is found by comparison that the improved genetic algorithm can almost avoid the trap of local optimum and effectively improve the convergent speed.

• ETRI Journal
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• 제10권2호
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• pp.3-12
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• 1988

Several ISDN (Integrated Services Digital Network) protocols have implemented at ETRI (Electronics and Telecommunications Research Institute) in an experimental network so that functional characteristics of the protocols under test could be certified against their protocol specifications with the help of the ETRI protocol test facilities. This paper describes ETRI protocol test architecture and its application to testing the NSP (Network Service Part) protocols : MTP (Message Transfer Part) level 3 and SCCP (Signalling Connection Control Part) of the CCITT CCS (Common Channel Signalling ) system No. 7 The test architecture presented here allows tests for two different protocol classes : peer-to-peer and multipeer protocolos. Some extensions are made to the conventional test architectures, namely the test coordination, test result transfer and network state observation method.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 추계학술대회
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• pp.677-678
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• 2012

액세스 네트워크의 연결 형태에 의한 B3G 네트워크 구조는 물리적/기능적 연결기준에 따라 크게 tightly-coupled 구조와 loosely-coupled 구조로 나누어진다. 본 논문에서는 이동 네트워크의 망연동에 대한 구조에서 tightly-coupled 구조에 대해 알아본다.

• 한국시뮬레이션학회논문지
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• 제9권2호
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• pp.103-118
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• 2000

ITS(Intelligent Transportation System) is an advanced system which can effectively handle the current transportation problems. DSRC(Dedicated Short Range Communication) is considered as a promising technology since it has the capability of two-way communication and can serves to implement various ITS services. In this paper, we study DSRC based ITS telecommunication traffic analysis and suggest an architecture and network design of telecommunication network for DSRC services. We also perform a simulation study to validate the proposed network architecture and design for Metropolitan Seoul Area with various network alternatives. In this simulation, we use actual traffic data and road characteristics from Seoul area and use our DSRC service configuration.

• 한국해양공학회지
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• 제18권2호
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• pp.33-38
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• 2004

All adaptive neural network controller has been developed for a model of an underwater vehicle. This controller combines a radial basis neural network and sliding mode control techniques. No prior off-line training phase is required, and this scheme exploits the advantages of both neural network control and sliding mode control. An on-line stable adaptive law is derived using Lyapunov theory. The number of neurons and the width of Gaussian function should be chosen carefully. Performance of the controller is demonstrated through computer simulation.

• 대한전기학회논문지:시스템및제어부문D
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• 제54권6호
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• pp.403-408
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• 2005

As the increasing integrity of VLSI, the BIST(Built-In Self Test) is used as an effective method to test chips. Generally the pseudo-random test pattern generation is used for BIST. But it requires too many test patterns when there exist random This paper proposes and presents a new efficient network architecture for Reflective Memory System (RMS). A time to copy shared-data among nodes effects critically on the entire performance of the RMS. In this paper, the recent researches about the RMS are investigated and compared. The device named Topology Conversion Switch(TCS) is introduced to realize the proposed network architecture. One of the RMS based industrial control networks, Ethernet based Real-time Control Network (ERCnet), is adopted to evaluate the performance of the proposed network architecture for RMS.

• Journal of the Optical Society of Korea
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• 제12권4호
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• pp.346-350
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• 2008

In this paper, we analyze the performance of a reliable, scalable, and cost-effective switchless wavelength division multiplexing (WDM) network based on an arrayed waveguide grating (AWG). The network efficiency is significantly increased by spatially reusing wavelengths and exploiting multiple free spectral ranges (FSRs) of the AWG employed in the architecture. We have analyzed the performance of this architecture by simulating in $Optsim^{TM}$ with a control channel which exploits the broadband light source, i.e., an LED. The data was successfully transmitted to a distance of 30 km without using any EDFA's in the network, with a reasonable BER of $4.0530{\times}10^{-14}$. We have analyzed the performance of this architecture with a control channel which exploits the broadband light source, i.e., an LED, by simulating in $Optsim^{TM}$.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권11호
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• pp.2143-2159
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• 2011

The hybrid architecture of content delivery networks (CDN) and peer-to-peer overlay networks (P2P) is a promising technology enables effective real-time streaming services. It complements the advantages of quality control and reliability in a CDN, and the scalability of a P2P system. With real-time streaming services, however, high connection setup and media delivery latency are becoming the critical issues in deploying the CDN-P2P system. These issues result from biased peer selection without location awareness or content awareness, and can lead to significant service disruption. To reduce service disruption latency, we propose a group-based CDN-P2P hybrid architecture (iCDN-P2P) with a location/content-aware selection of peers. Specifically, a SuperPeer network makes a location-aware peer selection by employing a content addressable network (CAN) to distribute channel information. It also manages peers with content awareness, forming a group of peers with the same channel as the sub-overlay. Through a performance evaluation, we show that the proposed architecture outperforms the original CDN-P2P hybrid architecture in terms of connection setup delay and media delivery time.

• 한국산학기술학회논문지
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• 제10권1호
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• pp.122-127
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• 2009

본 본 논문은 항공 교통 체계에서 가장 중요하게 고려되는 안전한 항공체계에 대한 연구를 중심으로 보안구조를 검토하고 보안모델을 제시하였다. 분석된 내용은 항공서비스 분야 관련 보안기술을 기반으로 국제적인 기술 동향과 함께 국내의 항공체계에 대한 보안모델을 다루고 있다. 항공통신 네트워크의 보안 프레임워크에서는 항공과 지상 데이터링크 보안기술, 항공체계에 따른 보안구조를 분석하였고 U-information HUB 모델의 보안구조를 제시하였다. U-information HUB 보안구조는 항공사, 공항 네트워크, 항공기, 관련 정부기관 등과 연동범위를 포함하고 있다.