• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 춘계학술대회
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• pp.592-593
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• 2021

지난해 7월, 대통령 주재 한국판 뉴딜 국민보고대회를 개최하여 그 핵심 전략으로 「한국판 뉴딜 종합계획」을 발표하였고, 교육 분야에서는 '그린스마트 미래학교' 사업이 한국판 뉴딜 10대 대표과제 중하나로 포함되었다. 그리고 작년 한해 COVID-19로 인한 비대면 수업 확산으로 일선 교육현장의 ICT기술의 요구가 빠르게 급증하였다. 따라서 본 논문에서는 과거 교실의 무선네트워크 및 유선 인프라의 문제점을 고찰하고 이후 비대면 수업 및 대면 수업시 사용가능한 초고속 무선네트워크를 보유한 그린 스마트 교실을 위한 유선네트워크 인프라와 무선 네트워크 장비들을 설계하고 실제 교실에 구축하기위한 예시를 제시하였다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 추계학술대회
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• pp.281-284
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• 2011

스마트폰은 시간과 장소와 기기의 제한을 받지 않는 유비쿼터스 사회로의 전환과 업무에 도입되고 있다. 급속한 스마트폰의 사용 증가는 모바일 업무의 활성화와 행정기관에서도 스마트사회로 전환을 가져왔다. 최근 스마트폰을 이용한 VoIP서비스가 활성화 되고 있지만, 스마트폰과 VoIP가 가지는 무선인터넷 취약점에 노출되고 있다. 본 논문에서는 스마트폰을 이용한 VoIP서비스에 대한 보안성을 강화하기 위한 암호화 기술을 연구한다. 내 외부 신호 및 통화 암호화와 행정기관 인터넷전화 보안 규격을 연구한다. 스마트폰 VoIP서비스에 대한 기기 인증서 보안과 내부 신호 및 통화 암호화를 연구한다. 본 논문은 스마트 시대에 스마트폰 VoIP사용의 안전성과 사용성에 기여할 것이다.

• 산업경영시스템학회지
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• 제44권2호
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• pp.43-57
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• 2021

Smart factories can be defined as intelligent factories that produce products through IoT-based data. In order to build and operate a smart factory, various new technologies such as CPS, IoT, Big Data, and AI are to be introduced and utilized, while the implementation of a MES system that accurately and quickly collects equipment data and production performance is as important as those new technologies. First of all, it is very essential to build a smart factory appropriate to the current status of the company. In this study, what are the essential prerequisite factors for successfully implementing a smart factory was investigated. A case study has been carried out to illustrate the effect of implementing ERP and MES, and to examine the extensibilities into a smart factory. ERP and MES as an integrated manufacturing information system do not imply a smart factory, however, it has been confirmed that ERP and MES are necessary conditions among many factors for developing into a smart factory. Therefore, the stepwise implementation of intelligent MES through the expansion of MES function was suggested. An intelligent MES that is capable of making various decisions has been investigated as a prototyping system by applying data mining techniques and big data analysis. In the end, in order for small and medium enterprises to implement a low-cost, high-efficiency smart factory, the level and goal of the smart factory must be clearly defined, and the transition to ERP and MES-based intelligent factories could be a potential alternative.

• 한국건설안전학회 논문집
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• 제4권1호
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• pp.22-29
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• 2021

추락사고 방지를 위해 근로자의 단순 실수와 부주의까지 포용할 수 있도록 건설현장 스마트 안전장비 사용 의무화 등의 정책 및 법령이 시행됨에 따라, 스마트 안전장비 기술 개발 및 현장 도입에 대한 관심이 더욱 증가되고 있다. 그러나 스마트 안전장비의 잠재성에도 불구하고, 사용자에게 채택되거나 사용되지 않으면 건설 안전에 기여할 수 있는 기회는 주어지지 않는다. 본 연구의 목적은 추락사고 방지를 위한 스마트 안전장비의 성능과 특징에 따른 사용자별 인식과 기대의 차이를 통해 스마트 안전장비 채택에 관한 결정요인을 조사하는 것이다. 이를 위해 스마트 안전장비 중 최근 국내/외에서 기술개발 및 연구가 활발히 진행 중인 스마트 안전대에 대한 안전관리자 및 근로자의 인식을 조사하였다. 연구 결과는 스마트 안전장비에 대한 사용자별 인식 차이를 확인함으로써 건설현장 추락사고 방지를 위한 스마트 안전장비 도입 활성화에 관한 통찰을 제공할 것이다.

• International journal of advanced smart convergence
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• 제6권2호
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• pp.51-58
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• 2017

Recently, rapid advances of Ethernet and IP technology have brought many changes in the sound industry. In addition, due to AoIP-based audio transmission technology, various problems of the acoustic system (sound quality deterioration due to long distance transmission, complicated wiring) have improved dramatically. However, when many distributed audio systems are connected with AoIP equipment, if there is a problem in the equipment, it is impossible to operate the connected system. AoIP equipment only can transmit audio signals but cannot adjust the system for acoustic environment. In this paper, AoIP equipment is to be installed with sound equipment on a one-to-one basis, so that various existing problems can be solved and adjustment of sound quality (reverberation, echo, delay and EQ) can be possible by AoIP-based OAC (On-site Audio Center) with built-in DSP function. As a result, uncompressed real-time transmission by distributed transmission/receipt module in OAC (On-site Audio Center) and high quality sound by adjustment of sound quality with built-in DSP can be acquired. It is expected that OAC based sound system will be the industry standard in ubiquitous environment.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2007년도 추계종합학술대회
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• pp.929-932
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• 2007

본 논문에서는 USN 내부의 센서를 통해 신속 정확한 화재 정보를 수신하여 방재관련 기타 시스템과 연계를 통해 각종 방재 자료를 정보화하고, 효과적인 소방시설의 유지관리에 중점을 두기 위하여 기존에 운용되고 있는 각종 설비의 관리시스템의 유기적인 통합 지원체계를 구축한 개방형 프로토콜을 지원하는 통합 방재 관리시스템을 구현하였다. 이를 검증하기 위해 CCTV설비, 고감도 환경 감지기, 자동화재탐지설비, 출입문 보안설비, 공조설비와 같은 Local 시스템을 개방형 네트워크를 이용하여 통합하고, 운영을 하기위한 운영 시나리오 검증과 통합방재 관리시스템의 서버 구조의 유효성을 검증하였다.

• International journal of advanced smart convergence
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• 제9권1호
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• pp.215-221
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• 2020

The paradigm of agriculture is also changing to address the problem of food shortages due to the increase of the world population, climate conditions that are increasingly subtropical, and labor shortages in rural areas due to aging population. With the development of Information Communication Technology (ICT), our daily lives are changing rapidly and heralds a major change in agricultural management. In a hyper-connected society, the introduction of high-tech into traditional Agriculture of the past is absolutely necessary. In the development process of Agriculture, the first generation produced by hand, the second generation applied mechanization, and the third generation introduced automation. The fourth generation is the current ICT operation and the fifth generation is artificial intelligence. This paper investigated Smart Farm that increases productivity through convergence of Agriculture and ICT, such as smart greenhouse, smart orchard and smart Livestock. With the development of sustainable food production methods in full swing to meet growing food demand, Smart Farming is emerging as the solution. In overseas cases, the Netherlands Smart Farm, the world's second-largest exporter of agricultural products, was surveyed. Agricultural automation using Smart Farms allows producers to harvest agricultural products in an accurate and predictable manner. It is time for the development of technology in Agriculture, which benchmarked cases of excellence abroad. Because ICT requires an understanding of Internet of Things (IoT), big data and artificial intelligence as predicting the future, we want to address the status of theory and actual Agriculture and propose future development measures. We hope that the study of the paper will solve the growing food problem of the world population and help the high productivity of Agriculture and smart strategies of sustainable Agriculture.

• Journal of Communications and Networks
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• 제14권6호
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• pp.640-652
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• 2012

Many studies have investigated the smart grid architecture and communication models in the past few years. However, the communication model and architecture for a smart grid still remain unclear. Today's electric power distribution is very complex and maladapted because of the lack of efficient and cost-effective energy generation, distribution, and consumption management systems. A wireless smart grid communication system can play an important role in achieving these goals. In this paper, we describe a smart grid communication architecture in which we merge customers and distributors into a single domain. In the proposed architecture, all the home area networks, neighborhood area networks, and local electrical equipment form a local wireless mesh network (LWMN). Each device or meter can act as a source, router, or relay. The data generated in any node (device/meter) reaches the data collector via other nodes. The data collector transmits this data via the access point of a wide area network (WAN). Finally, data is transferred to the service provider or to the control center of the smart grid. We propose a wireless cooperative communication model for the LWMN.We deploy a limited number of smart relays to improve the performance of the network. A novel relay selection mechanism is also proposed to reduce the relay selection overhead. Simulation results show that our cooperative smart grid (coopSG) communication model improves the end-to-end packet delivery latency, throughput, and energy efficiency over both the Wang et al. and Niyato et al. models.

• 한국산업정보학회논문지
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• 제20권4호
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• pp.47-54
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• 2015

스마트 기술의 확산으로 인하여 개인용 기기와 사무용 기기 가운데 많은 제품들이 스마트 기능을 탑재하고 있다. 이러한 변화는 사용자들의 작업을 원격지에서 시행할 수 있는 시대를 열고 있다. 이에 본 연구에서는 우리 주변에서 쉽게 찾아볼 수 있는 멀티 플러그에 스마트 기능을 추가하여 언제 어디서든 무선 네트워크 기술을 통하여 가정에 설치된 멀티 플러그를 조작할 수 있도록 하는 스마트 멀티 플러그 시스템을 설계하고 구현함으로써 기존의 멀티 플러그가 갖는 한계를 보완하고자 한다. 본 논문에서 제안하는 스마트 멀티 플러그는 스마트 기기에서 원격으로 언제 어디서든 플러그를 조작함으로써 노약자나 어린이 등 스스로 전원장치의 작동이 어려운 사용자에게 필요한 서비스를 제공할 수 있으며 u-Farming, 테라리움, 스마트 홈 등 원격으로 전원장치의 관리가 필요한 분야에서 폭넓게 사용될 것으로 기대된다.

• International Journal of Computer Science & Network Security
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• 제21권4호
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• pp.255-263
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• 2021

Smart grid is a fully-automated, bi-directional, power transmission network based on the physical grid system, which combines sensor measurement, computer, information communication, and automatic control technology. Blockchain technology, with its security features, can be integrated with Smart Grids to provide secure and efficient power management and transmission. This paper dicusses the deployment of Blockchain technology in Smart Grid. It presents application areas and protocols in which blockchain can be applied to in securing smart grid. One application of each area is explored in detail, such as efficient peer-to-peer transaction, lower platform costs, faster processes, greater flexibility in power generation to transmission, distribution and power consumption in different energy storage systems, current barriers obstructing the implementation of blockchain applications with some level of maturity in financial services but concepts only in energy and other sectors. Wide range of energy applications suggesting a suitable blockchain architecture in smart grid operations, a sample block structure and the potential blockchain technicalities employed in it. Also, added with efficient data aggregation schemes based on the blockchain technology to overcome the challenges related to privacy and security in the smart grid. Later on, consensus algorithms and protocols are discussed. Monitoring of the usage and statistics of energy distribution systems that can also be used to remotely control energy flow to a particular area. Further, the discussion on the blockchain-based frameworks that helps in the diagnosis and maintenance of smart grid equipment. We have also discussed several commercial implementations of blockchain in the smart grid. Finally, various challenges have been discussed for integrating these technologies. Overall, it can be said at the present point in time that blockchain technology certainly shows a lot of potentials from a customer perspective too and should be further developed by market participants. The approaches seen thus far may have a disruptive effect in the future and might require additional regulatory intervention in an already tightly regulated energy market. If blockchains are to deliver benefits for consumers (whether as consumers or prosumers of energy), a strong focus on consumer issues will be needed.