• Annual Conference of KIPS
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• 한국정보처리학회 2017년도 추계학술발표대회
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• pp.37-40
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• 2017

네트워크 기술의 발전으로 인터넷의 보급률이 증가함에 따라, 네트워크 사용량 또한 증가하고 있다. 그러나 네트워크 사용량이 증가함에 따라 악의적인 네트워크 접근 또한 증가하고 있다. 이러한 악의적인 접근은 네트워크에서 발생하는 보안 로그를 분석함으로써 탐지가 가능하다. 그러나 대규모의 네트워크 트래픽이 발생함에 따라, 보안 로그의 처리 및 분석에 많은 시간이 소요된다. 본 논문에서는 MapReduce 환경에서 네트워크 공격 탐지를 위한 실시간 로그 분석 시스템을 개발한다. 이를 위해, Hadoop의 MapReduce를 통해 보안 로그의 속성을 추출하고 대용량의 보안 로그를 분산 처리한다. 아울러 처리된 보안 로그를 분석함으로써 실시간으로 발생하는 네트워크 공격 패턴을 탐지하고, 이를 시각적으로 표현함으로써 사용자가 네트워크 상태를 보다 쉽게 파악할 수 있도록 한다.

• Electronics and Telecommunications Trends
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• 제20권2호통권92호
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• pp.21-32
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• 2005

지능형 로봇은 인간 생활 환경에서 작동하고 일반 소비자를 대상으로 한다는 점에서 기존의 산업용 로봇과는 다른 내부 구조를 가져야 한다. 또한 표준화된 개방 구조를 갖추어 로봇 전용의 부품 산업이 활성화 될 수 있도록 하여 결과적으로 로봇의 단가를 낮출 수 있어야 한다. 본 고에서는 공장자동화와 자동차 분야에서 먼저 도입되고 있는 버스 형태의 제어 통신망이 지능형 로봇 분야에서 어떤 이점을 제공하는지에 대해 살펴보고, 최근의 2족 보행로봇에 성공적으로 적용되고 있는 대표적인 실시간 제어 통신망의 하나인 CAN에 대해 분석하고 CAN에 기반한 상위레벨 프로토콜을 소개한다.

• ETRI Journal
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• 제29권1호
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• pp.120-123
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• 2007

In this letter, we address the problem of resource allocation with efficiency and quality of service (QoS) support in uplink for a wireless CDMA network supporting real-time (RT) and non-realtime (NRT) communication services. For RT and NRT users, there are different QoS requirements. We introduce and describe a new scheme, namely, traffic aided uplink opportunistic scheduling (TAUOS). While guaranteeing the different QoS requirements, TAUOS exploits the channel condition to improve system throughput. In TAUOS, the cross-layer information, file size information, is used to improve fairness for NRT users. Extensive simulation results show that our scheme can achieve high system throughput in uplink wireless CDMA systems, while guaranteeing QoS requirements.

• Proceedings of the IEEK Conference
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• 대한전자공학회 2002년도 ITC-CSCC -3
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• pp.1602-1605
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• 2002

Communication schemes are currently changing from circuit switched towards packet switched. These changes enable access to Internet and multimedia services in wireless network. Provision of real-time IP services in air interface introduces relatively large overhead in RTP/UDP/IP headers. To reduce the overhead, the header compression schemes are required. There exist two header compression schemes (CRTP, ROHC) which are IETF standards. We propose Context-ID detection method which reduces more efficiently the packet loss rate than two existing schemes. Its performance in WCDMA system environment is evaluated for CRTP and ROHC schemes.

• Journal of Korean Institute of Industrial Engineers
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• 제13권2호
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• pp.17-34
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• 1987

Modern telecommunication switching systems are SPC (Stored Program Control) machines handling voice, data and other kinds of traffic, in an environment which tends to be fully digital switching and transmission. The throughput of such systems is determined by the real time capacity of its centralized or distributed control processors and by the traffic capacity of the switching network. Designers must verify the traffic and call processing capacity of the switching system and check its performance under traffic load before it is put into service. Verification of traffic and call processing capacity of switching systems is one of the problems treated by teletraffic studies; teletraffic studies are based on stochastic process, queueing theory, simulations and other quantitative methods of decision making. This paper reviews the general methodologies to evaluate the throughput and performance of the digital switching system. TDX-10, which is a fully digital switching system under development in ETRI, is employed to give illustrative examples of the methodologies discussed in this paper.

• Journal of Power Electronics
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• 제3권1호
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• pp.10-16
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• 2003

Implementation and experimental verification of a simple neuro-controller (SNC) as a speed controller for a brush less DC (BLDC) motor is presented. The SNC with one weight and a linear hard limit activation function is trained on-line using the back propagation algorithm. A modified error function is used to ensure good performance during the on-line training, which has been used without previous off-line training. The SNC has been implemented using a computer-interface card mounted on a PC. The driving system performance has been investigated by a number of experimental tests for a variety of input reference speed trajectories.

• Proceedings of the KIPE Conference
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• 전력전자학회 2005년도 전력전자학술대회 논문집
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• pp.90-92
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• 2005

As the developing of industry, the nonlinear equipments as inverter, converter, SMPS(Switching Mode Power Supply) and motor have been increased. But the sensitive electronic loads to the power quality, such as computer's and other electronic equipments, have been spreaded out very fast. Thus, the power quality (PQ) problems and the real time power quality monitoring (PQM) are one of the important issues industry and building area for the intelligent control of the systems. One of them, PQM using PLC(Power Line Communication) have good merits that can send and receive the PQ information without any new network line. This paper presents the PQM hardware and software to monitor the PQ information by using PLC that meets the categories of IEEE Std. 1159.

• Proceedings of the KIPE Conference
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• 전력전자학회 2018년도 전력전자학술대회
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• pp.273-274
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• 2018

Recently, many countries around the world are investing heavily in green industries based on green IT technology. The key industry in the green industry is LED. If we replace traditional lighting, we can save a lot of socioeconomic costs. Because it is energy efficient. However, the research and development on maintenance and management are still insignificant about LED lighting. Therefore, after the failure, the post-treatment is delayed and often occurs. In order to solve these problems, it is planned to detect the failure of the LED lighting and to establish a monitoring system that can monitor the situation in real time on the computer or mobile phone of the remote manager using the latest IoT network technology.

• Annual Conference of KIPS
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• 한국정보처리학회 2003년도 춘계학술발표논문집 (하)
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• pp.2113-2116
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• 2003

이 논문에서는 리눅스 기반VDPM(Virus Detection Protection Management)시스템을 제안하고 개발한 응용SW로 감지, 차단 및 관리 방법을 제시한다. 제안된 LVPM시스템은 첫째특정탐색 및 전체탐색 알고리듬에 의하여 개발된 VDPM시스템은 신종 바이러스까지 탐지하는 모든 종류의 바이러스 탐지(VDPM_hawkeye) 모듈, Virus첵크하는 감시 및 Virus첵크후 친정, 제거하는 방지(VDPM_medic)모듈, DB를 update하는 기능을 가지는 관리(VDPM_manager)모듈과 원격 DB관리 및 Virus결과 보고 기능 (VDPM_reporter) 모듈로 되어 있으며 지능적인 Virus방지 시스템, 둘째 네트워크 패킷을 분석하여 네트워크를 통한 침 바이러스 탐지 및 대응 시스템과 셋째 네트워크 패킷을 분석하여 네트워치를 통한 네트워크형 악성 소프트웨어 대응 시스템을 포함한 바이러스 보호 통합 시스템을 구현하였다. 더불어 호스트와 네트웍기반의 통합적인 IDS가 방화벽(Firewall)시스템과 연동하여 IDS 단독 차단이 불가능한 공격을 차단하는 소프트웨어 시스템을 개발하는 것이며 관리자가 사용하기 쉬운 GUI환경으로 구현하였고 대규모 분산 네트워크 환경에서 효율적인 리눅스기반 침입탐지방지관리 솔루션을 제시한다.

• Proceedings of the KIEE Conference
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• 대한전기학회 2000년도 하계학술대회 논문집 D
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• pp.2542-2544
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• 2000

In this paper, CAN(Controller Area Network)is used to solve the wire harness problem in the outside mirror of automobile which has a lot of functions in narrow space. If the number of wires is reduced, it has benefits of lower product cost and maintenance. CAN was originally developed by the German company Robert Bosch for use in the car industry to provide a cost-effective communications bus for in car electronics and as alternative to expensive and cumbersome wiring looms. CAN controller is a serial communication protocol which efficiently supports distributed real-time control with a very high level of security. The communication between master CAN controller and slave CAN controller is realized and controller's performance is tested by experiment.