• 전자통신동향분석
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• 제36권6호
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• pp.13-24
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• 2021

Industrial networks has been developing various technologies from fieldbus technology to industrial Ethernet and time-sensitive networking. The industry expects that the 5G mobile network will solve the diverse and highly specific industrial site requirements. Accordingly, 3GPP has been developing standard functions to provide ultra-high reliability, ultra-high speed, ultra-connection, and ultra-low latency services, and 3GPP Rel-16 began developing ultra-low latency and ultra-high reliability communication functions for 5G mobile networks to support vertical industries. In this paper, we show the related standardization trends and requirements to apply industrial IoT service scenarios to 5G mobile networks, and in particular, we introduce 5G system features and extended 5G system architecture to provide time sensitive communication and time synchronization services.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권8호
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• pp.3701-3727
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• 2016

Recently Service Function Chaining (SFC) is promising to innovate the network service mode in modern networks. However, a feasible implementation of SFC is still difficult due to the need to achieve functional equivalence with traditional modes without sacrificing performance or increasing network complexity. In this paper, we present a configurable network service chaining (CNSC) mechanism to provide services for network traffics in a flexible and optimal way. Firstly, we formulate the problem of network service chaining and design an effective service chain construction framework based on integrating software-defined networking (SDN) with network functions virtualization (NFV). Then, we model the service path computation problem as an integer liner optimization problem and propose an algorithm named SPCM to cooperatively combine service function instances with a network utility maximum policy. In the procedure of SPCM, we achieve the service node mapping by defining a service capacity matrix for substrate nodes, and work out the optimal link mapping policies with segment routing. Finally, the simulation results indicate that the average request acceptance ratio and resources utilization ratio can reach above 85% and 75% by our SPCM algorithm, respectively. Upon the prototype system, it is demonstrated that CNSC outperforms other approaches and can provide flexible and scalable network services.

• 대한가정학회지
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• 제40권2호
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• pp.143-159
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• 2002

Consumer Education Policy for -Focusing on developing Social support System- The purpose of this research is to understand the change of future consuming environment and the characteristics of future potential consumer: the net generations. With those research results, we deduced our goal, content and method of consumer education for these net generations. Finally, I suggested a scheme of the social construction by demand of our future society. Literature review and depth interview are used for this research. The main factors of the change of our future consuming environment are Digitalization, globalization, improvement of consumer sovereignty, Sustainable consumption culture, the increasing pursuit of safe life. It is necessary to educate our future consumer, net generations, the information searching skills in order to be able to obtain right information. We also need to educate them how to practice the safe life and Sustainable consumption and how to get consumers sovereignty. The method of the education requires interchangeable communication. We need social networking system for the support of consumer education, in order to build this social system. We need an administrative support from the government and financial support from corporations. We have suggested that it is very desirable to share all the information developed among Academic field, Consumer related organizations and schools by this network be build.

• 한국통신학회논문지
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• 제40권6호
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• pp.1070-1080
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• 2015

본 논문은 Science DMZ(Demilitarized Zone) 적용을 위한 SDN(Software Defined Networking) 기반의 네트워크 침입 방지 시스템을 소개한다. 제안된 시스템은 침입 탐지 기능을 침입 방지 장치로부터 분리하고 SDN 기술을 확장해 탐지 기능과 방어 기능을 상호 연동시킴으로써 네트워크 보안 장비의 유연성(flexibility)과 확장성(extensibility)을 높이고 패킷 검사(packet inspection) 등으로 야기되는 패킷 손실을 방지하는데 목적이 있다. 본 논문에서는 제안한 프레임워크의 한 응용 시나리오를 소개하고 국가과학기술연구망에 구축된 네트워킹 DMZ환경에 시험 적용함으로써 활용 가능성을 검증한다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 춘계학술대회
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• pp.541-543
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• 2015

IT 기술 발전과 스마트 기기의 대중화로 인해 SNS(Social Networking Service)를 사용하는 사용자들이 증가하고 있다. 이로 인해 SNS에서 발생하는 데이터들도 급증하고 있고, 이러한 데이터에서 가치를 창출하기 위해 IT 기업들은 기술 개발을 하고 있다. 본 논문에서는 트위터에서 발생하는 데이터의 가치를 창출하기 위해 트위터에 접속하는 정보를 통계 내는 시스템을 설계하고 구현하고자 한다. 제안하는 시스템은 트위터 데이터를 수집하고 NoSQL 기반으로 저장한 뒤에 Mahout 사용하여 사용자들의 접속 정보를 통계 내는 시스템이다. 개발 시스템을 이용하면 트위터 데이터에서 가치를 창출하기 위해 필요한 기술 개발의 배경 마련에 도움이 될 것이라고 예상된다.

• 전기학회논문지
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• 제65권7호
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• pp.1252-1256
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• 2016

Internet of Things(IoT)-devices are now expanding inter-connecting networking technologies to invent healthcare monitoring system especially for assessing physiological conditions of the chronically-ill patients those with cardiovascular diseases. Hence, IoT system is expected to be utilized for home healthcare by dedicating the original usage of IoT devices to collect the biomedical data such as electrocardiogram(ECG) and photoplethysmography(PPG) signal. The aim of this work is to implement health monitoring system by integrating IoT devices with Raspberry-pi components to measure and analyze ECG and the multi-channel PPG signals. The acquired data and fiducial features from our system can be transmitted to mobile devices via wireless networking technology to support the concept of tele-monitoring services based on IoT devices.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1999년도 동계 학술대회 논문집
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• pp.726-733
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• 1999

• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2009년도 International Meeting of the Microbiological Society of Korea
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• pp.74-74
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• 2009

• 한국통신학회:학술대회논문집
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• 한국통신학회 1982년도 추계학술발표회논문집
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• pp.19-21
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• 1982

In ancient age of Korea, Fire and smoke beacon system is only one method which transmitted an information. This paper is dealt with several problems of modern communication analysis on it. For example informaiton analysis, networking, modulation, demodulation and encoding etc, of beacon System.

• 한국시스템다이내믹스연구
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• 제3권1호
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• pp.61-77
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• 2002

This paper reviews issues and methodological status of system dynamics and suggest some research agenda for its development in Korea. After reviewing some characteristics of system dynamics approach, including dynamic feedback perspective and endogenous point of view, the paper pointed out methodological characteristics of system dynamics. It seems to be the most notable characteristics of System Dynamics that it use both quantitative and qualitative approach in explaining and modelling reality. Besides, System Dynamicists rely more heavily on refutationism than instrumentalism and this allows System Dynamicists follow more strict way of scientific inquiry. For the development of System Dynamics in Korean academic circle, developing training program and curriculum, networking scattered System Dynamicist all over the country, would be the most important task.