• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.2
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• pp.27-40
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• 2016

This paper aims to analyze the business types of 237 IoT based smart home companies in the world (launched during 1999~2014) which got global investment last few years. For this, the previous literatures trying to analze technology and service types of smart home are searched and the typology of the platform is discussed. Based on it, this research conceptualizes an analysis framework that includes three areas of smart home like home automation, home security, and energy efficiency with the three platform types like product, software, and service. This study concludes that the development of business type for IoT based smart home ecosystem is from the product to software and it can be a platform or not. In current status, there are a few platforms of product and software, but in the device management (16%) and thermostat (11%), companies are persuing more platform like. It is difficult to find the service platform in overall areas, for application based service has a few attractions in the investment market due to the lack of cloud infrastructure and data analytics. The following three are the implication to domestic market: 1) More active offering of API and SDK, 2) more active introduction of wireless Intenet network protocols, and 3) more active interoperability efforts and alliance activities are needed.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.18 no.1
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• pp.74-82
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• 2019

The revolution of industry 4.0 is enabling us to build an intelligent connection society called smart cities. The use of renewable energy in particular solar energy is extremely important for modern society due to the growing power demand in smart cities, but its difficult to monitor and manage in each buildings since need to be deploy low energy sensors and information need to be transfer via wireless sensor network (WSN). The Internet of Things (IoT) / low-power wide-area (LPWA) is an emerging WSN technology, to collect and monitor data about environmental and physical electrical / electronics devices conditions in real time. However, providing power to IoT sensor end devices and other public electrical loads such as street lights, etc is an important challenging role because the sensor are usually battery powered and have a limited life time. In this paper, we proposes an efficient solar energy-based power management scheme for smart city based on IoT technology using LoRa wide-area network (LoRaWAN). This approach facilitates to maintain and prevent errors of solar panel based energy systems. The proposed solution maximizing output the power generated from solar panels system to distribute the power to the load and the grid. In this paper, we proved the efficiency of the proposed system with Simulink based system modeling and real-time emulation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.542-543
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• 2018

대부분의 사물인터넷 디바이스는 스마트폰 애플리케이션으로 제어하고 있어 제조사가 다른 디바이스를 사용할 경우 여러 애플리케이션을 설치하여 사용하여야 한다. 본 논문에서는 스마트홈 환경에서 사물인터넷 디바이스와 서비스를 통합 제어할 수 있는 사물인터넷 리모컨을 제안한다. 그리고 사물인터넷 리모컨의 초기 설정을 위한 애플리케이션과의 연동 테스트를 진행하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.11
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• pp.501-509
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• 2020

Earthwork in the construction field is a core process of construction, and it is used in almost all processes and is connected to the safety of the structure directly. Therefore, it is essential to analyze and confirm the road tamping through a plate bearing test and a field density test. The current analog measurement methods for road tamping measurement is difficult to check in real-time, accurate location information, time information, and the history management of workers in the field. Therefore, IoT (Internet of Things)-based DCPT (Dynamic Cone Penetration Test) was developed for a smart construction environment with a solution to the problem. The Smart DCPT system operated in a smartphone environment is IoT-based. The Smart DCPT system can apply various applications and has advantages of flexibility, low cost, and high efficiency. The IoT-based DCPT records the digital road tamping information, location information, time information, and worker information per measurement count. In addition, the various information is transmitted in real-time to the management center through a smartphone. This system is expected to contribute to the management of the construction process.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.313-316
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• 2018

기존의 농장 관리 방식은 사람이 직접 농작물에 물을 공급하고, 농약을 뿌리는 등 1세대적인 관리 방식이다. 하지만 현재 우리나라 농업은 농촌인구의 감소 및 고령화, 농가소득 정체, 한반도의 기후변화 심화 등의 여러 가지 어려움을 겪고 있다. 그로 인해 IoT 기술 기반의 효율적인 무인 농장 관리 시스템의 필요성이 강조되었고 계속해서 개발되고 발전해 나가고 있다. 본 논문에서는 아두이노와 무선통신, 웹서버, 안드로이드 어플리케이션을 이용한 무인 농장 시스템을 구현하였다. 아두이노의 와이파이, 온습도, 릴레이 모듈 등을 이용하여 통신 연결을 하고 각종 환경, 제어정보들을 HTTP 통신을 이용하여 웹서버와 통신하여 전달하고 제어한다. 그 후 웹서버에서 받은 데이터를 웹 데이터베이스에 저장하고 관리하여 안드로이드 어플리케이션에서도 농장의 정보를 모니터링할 수 있고, 농기계 등의 기계의 전원을 제어할 수 있는 방법을 제안한다.

• Smart Media Journal
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• v.5 no.2
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• pp.24-32
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• 2016

Recently, the development of electronic teaching materials and the demand of digital learners have led the needs on the education contents that replace learning from character information and the change of an information design method for this. Chinese character education in the traditional schooling mainly focuses on writing and memorization (semantic memory). This way that the stories do not exist has brought the learners' recognition that Chinese character is difficult to learn. Meanwhile, for a language study such as English, cross-media development between printed materials and audio-visual materials has been actively introduced. The method that extends episode memories along with memorization through a story is widely used. Therefore, this content suggests a prototype, which is broken away from an existing way of learning Chinese character that mainly focuses on writing, one sided instruction and information cramming. This makes learners learn through a story from printed materials and animation. Furthermore, it suggests a method that extends episode memories through Chinese education contents based on IoT explaining the principle of Chinese character by combining IT technology (information and communications, IoT) and education contents on block toys.

• Land and Housing Review
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• v.11 no.1
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• pp.103-108
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• 2020

Autonomous things system is a technology that judges and acts based on using surrounding information by itself, and it is evaluated as a future technology that can replace the current IoT technology. The current IoT technology is widely used from facility monitoring to machine control but it is shown weakness as a evaluation and prediction technique despite of smart city important technology. In this study, in order to confirm the application of the autonomous things technology, a monitoring system was installed on a real reservoir dam facility and long-term monitoring was performed that the measuring device itself judges and control as a facility monitoring technology. The autonomous things technology was confirmed during 19 months and it is possible to continuous measurement in the same way as current automated instrumentation. In addition, it was confirmed that the ICT device itself could to control autonomously measurement cycle according to the rainfall by itself.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.764-766
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• 2022

본 시스템은 스마트폰에서 사용자의 음성을 이용해 집 안이나 밖에서 IoT 단말을 효율적으로 제어할 수 있는 시스템으로, 인식된 음성에 맞춰 가전제품 기동, 조명 조절 등 IoT 단말을 컨트롤한다. 사용자의 음성은 Json 형태의 명령으로 변환되어 에지 컴퓨팅 기술을 통해 저사양 단말이 고사양 단말의 유휴자원을 활용하며 명령에 따른 IoT 단말 컨트롤이 진행된다. 이러한 아키텍처는 IoT 단말 데이터를 외부에 노출하지 않고 컴퓨팅 자원을 효율적으로 운용할 수 있는 시스템을 제공한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2024.05a
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• pp.231-232
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• 2024

홈 IoT 사용의 확대로 우리의 생활이 편리해진 반면, 보안 취약점을 통해 사생활을 침해하는 문제가 다수 발생하고 있다. 따라서 사용자들이 안전하게 사용할 수 있는 스마트 홈 보안 시스템이 필수적이다. 본 논문에서는 웹 페이지에 홈 IoT 환경을 구성한 후, AWS 서비스를 활용하여 로그를 수집하고 이상 징후를 찾는다. 침입 및 공격이 탐지되면 웹 페이지를 통해 사용자에게 알림을 전송한다. 사용자에게 경고와 조치 안내를 제공하여 빠른 대응이 가능하도록 한다.

• Smart Media Journal
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• v.3 no.3
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• pp.20-25
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• 2014

This research proposes a concept of multi-aspect Social IoT platform that enables human, machine and service to communicate smoothly among them, as well as a means of an automatic process for transforming exiting domain knowledge representation to generic ontology representation used in the platform. Current research focuses on building a machine-based service interoperability using sensor ontology and device ontology. However, to the best of our knowledge, the research on building a semantic model reflecting multi-aspects among human, machine, and service seems to be very insufficient. Therefor, in the research we first build a multi-aspect ontology schema to transform the representation used in each domain as a part of IoT into ontology-based representation, and then develop an automatic process of generating multi-aspect IoT ontology from the domain knowledge based on the schema.