• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권5호
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• pp.1516-1539
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• 2022

This article shows a set of physical information fusion IoT systems that we designed for smart buildings. Its essence is a computer system that combines physical quantities in buildings with quantitative analysis and control. In the part of the Internet of Things, its mechanism is controlled by a monitoring system based on sensor networks and computer-based algorithms. Based on the design idea of the agent, we have realized human-machine interaction (HMI) and machine-machine interaction (MMI). Among them, HMI is realized through human-machine interaction, while MMI is realized through embedded computing, sensors, controllers, and execution. Device and wireless communication network. This article mainly focuses on the function of wireless sensor networks and MMI in environmental monitoring. This function plays a fundamental role in building security, environmental control, HVAC, and other smart building control systems. The article not only discusses various network applications and their implementation based on agent design but also demonstrates our collaborative information fusion strategy. This strategy can provide a stable incentive method for the system through collaborative information fusion when the sensor system is unstable in the physical measurements, thereby preventing system jitter and unstable response caused by uncertain disturbances and environmental factors. This article also gives the results of the system test. The results show that through the CPS interaction of HMI and MMI, the intelligent building IoT system can achieve comprehensive monitoring, thereby providing support and expansion for advanced automation management.

• 한국정보처리학회논문지
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• 제6권11S호
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• pp.3229-3242
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• 1999

At recent, the Internet is evolving into the directions which is capable of incorporating stream-type services such as voice and video services due to the remarkable growth of WWW service and the development of new multimedia application services. However, the existing Internet can only support a best-effort delivery model and thus it is difficult to satisfy these requirements as well as to provide the QoS beyond a certain degree. Accordingly, it is imperative to develop QoS-based routing algorithm in order to allow flexible routing by the Internet user's QoS demand and to be applied into wide area networks. In this paper, we presented new routing algorithms for next generation Internet services and made performance evaluations. The proposed algorithms allow the routing by the user's QoS demand level in order to provide the diverse Internet application services based on ATM network environment that is expected to play a role as an infrastructure of next Generation Internet Services.

• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2000년도 춘계학술대회
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• pp.301-320
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• 2000

This paper is concerned with characteristics of Internet retailing and manufacturer's product development strategy using Internet retailing. First, this paper reviews the current status of Internet retailing companies and explains some barriers to taking advantage of Internet retailing. Second, this paper gives a few suggestions for manufacturer's strategy for product innovation and development which is based on Internet retailing. The suggestions are (1) Product Innovation (2) Target Costing (3) Eliminate Design Mistakes.

• International journal of advanced smart convergence
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• 제8권2호
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• pp.109-115
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• 2019

Currently, LPWA(Low Power Wide Area) communication technology is widely used due to the development of IoT(Internet of Things) technology. Among the LPWA technologies, LoRaWAN(Long Range Wide Area Network) is widely used in many fields due to its wide coverage, stable communication speed, and low-cost modem module prices. In particular, LoRa(Long Range) can easily construct LoRaWAN with a dedicated gateway. So many organizations are building their own LoRaWAN-based networks. The LoRaWAN Gateway receives the LoRa packet transmitted from an End-device installed in the adjacent location, converts it into the Internet protocol, and sends the packet to the final destination server. Current LoRa Gateway uses a single-hop method, and each gateway must include a communication network capable of the Internet. If it is the mobile communication(i.e., WCDMA, LTE, etc.) network, it is required to pay the internet usage fee which is installed in each gateway. If the LoRa communication is frequent, the user has to spend a lot of money. We propose an idea on how to design a multi-hop protocol which enables packet routing between gateways by analyzing the LoRaWAN communication method implemented in its existing single-hop way in this paper. For this purpose, this paper provides an analysis of the standard specification of LoRaWAN and explains what was considered when such protocol was designed. In this paper, two gateways have been placed based on the functional role so as to make the multi-hop protocol realized: (i) hopping gateway which receives packets from the end-device and forwards them to another gateway; and (ii) main gateway which finally transmits packets forwarded from the hopping gateway to the server via internet. Moreover, taking into account that LoRaWAN is wireless mobile communication, a level-based routing method is also included. If the protocol proposed by this paper is applied to the LoRaWAN network, the monthly internet fee incurred for the gateway will be reduced and the reliability of data transmission will be increased.

• 한국CDE학회논문집
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• 제7권1호
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• pp.57-65
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• 2002

The purpose of this research is to develop a collaborative architectural design system. Design collaboration requires an extensive use of communication methods as well as the participation of various experts from different domains. Such facts address several issues when the Internet and digital media are able to create a completely new work environment. The building design process was studied, and possible modes of design collaboration were defined. A prototype system is being developed in accordance with the defined collaboration model. The system integrates a set of communication tools and web-based design media. Such media include a synchronous multi-user web CAD tool, a schematic 3D design tool, and a electronic whiteboard. A project database was designed in order to coordinate the project-wide communication which elaborates technologies such as web-based data access. In order to find out the effectiveness of the system, a usability test was performed both in quantitative and qualitative manner. The research will contribute to the development of world-wide design and construction collaboration through the Internet, which is becoming a mainstream building process model.

• 대한조선학회논문집
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• 제47권6호
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• pp.831-835
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• 2010

Currently, engineering design is carried out in a distributed manner geographically or physically. This imposes new requirements on the computational environments, such as efficient integration and collaboration in the Internet and network environments. Meanwhile, Web-based distributed design has led new paradigms in design and manufacturing fields. For example, Web-based technologies have reduced the product development time and to ensure a competitive product in order to exchange and interact of real-time design information that integrates the distributed design environment between departments as well as companies via Internet and Web. Hence, efficient data communication for design information sharing is the basis for collaborative systems in the distributed environments. Design data communication techniques such as CORBA, DCOM, and JAVA RMI have been considered in the existing research, but these techniques have some disadvantages such as limitations of interoperability and firewall problems. This paper presents the application of engineering design problems in which distributed design information resources are integrated and exchanged using Web Service for supporting XML and HTTP without interoperability and firewall problems.

• 디자인학연구
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• 제17권1호
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• pp.253-264
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• 2004

본 연구의 최종 목표는 모바일 인터넷 서비스의 사용편의성을 높이는 데 있어 그래픽디자인 평가 방법론을 개발하고, 인터페이스 디자인에서의 사용자 니즈(needs)를 예측할 수 있는 측정모델을 개발하며, 평가기반을 시스템화 하는데 있다. 이를 위해 GUI 디자인 평가 방법론의 핵심 내용을 시스템화하여 프로토타입(Prototype) 설계 및 평가과정을 직접 지원하는 UI 설계지원 시스템으로 구현하였다. Small Screen이라는 제한된 display 환경에서는 사용자가 인지의 과부하 없이 단시간에 임무를 완성하도록 조작정보의 흐름을 즉각적이고 함축적인 방법으로 알려줄 수 있는 사용자 중심의 시각언어-이미지를 이용하여야 하며, 또한 UI 설계에 반영함에 있어서는 객관성을 높여야만 한다. 이에 모바일 인터넷의 사용편의성을 체계적으로 평가할 수 있는 디자인 평가 방법론은 매우 중요하며, 특히 사용자의 디자인 니즈 및 트렌드(Trend)를 예측할 수 있는 그래픽디자인 평가모델은 사용자의 감성적인 측면을 인터페이스 디자인에 반영할 수 있다는 특성으로 해서 그 의의가 매우 크다고 할 것이다. 이러한 디자인 평가라는 결과를 토대로 모바일 인터넷 표준 GUI가 설계되었으며, 차후 유비쿼터스(Ubiquitous) 환경의 GUI 개발에도 활용이 될 수 있는 기초가 되었으면 한다.

• 전기학회논문지P
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• 제58권4호
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• pp.422-426
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• 2009

The key point on water culture is the precise irrigation control according to the growth condition of growing plant. And most existing irrigation controllers are operated independently. So, the manager must be resided at hydroponic farm. In this paper, we design the irrigation control system based on wireless Internet that can be providing various control functions according to the growth condition of growing plant by using the cellular phone.

• 스마트미디어저널
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• 제4권3호
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• pp.62-67
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• 2015

The trend keywords in ICT sector will be Big Data, Internet of Things, and Cloud Computing. The rear end to support those techniques requires a large-capacity storage technology of low-cost. Therefore, we proposed the prototype of low-cost and mass distributed storage system based on PC using open-source Ceph FS for SMB.

• 한국정보통신학회논문지
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• 제8권8호
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• pp.1640-1646
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• 2004

본 논문에서는 휴대인터넷 기술을 이용한 P2P 망 설계 및 다자간 VoIP 서비스제공 방안을 제안하였다. 본 논문에서는 이러한 서비스를 실시간으로 제공하기 위해서 휴대인터넷 기술을 이용하여 음성서비스의 가능성을 확인하였다. 연구결과 휴대인터넷 망에서 P2P을 이용한 VoIP 서비스 망을 설계하고 성능평가를 실시한 결과 만족할 만한 연구 결과가 나타나 향후 서비스를 하게 될 휴대인터넷에서 활용 가능성을 예상할 수 있었다.