• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.719-722
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• 2016

These days there have been trying to fuse the various of IoT (Internet of Things) technology over the industrial field. However the complicated IoT System structure comprised of sensor devices, gateway, network server, and application server causes the difficulties to the system implementation and the increment of installation cost, thereby preventing IoT system deployment in the industry fit for small size network environment. In this paper, authors propose a novel IoT system architecture that is useful in the industry field to be implemented by the small size network with low cost. Also, we implement the infrastructure to RF433 wireless sensor network, the gateway on ARDUINO YUN, and the application server using AMP (Apache, PHP, MySQL) package and then present a power efficient management scheme for sensor devices.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.3
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• pp.137-143
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• 2017

This paper presents a smart parking guidance system based on IoT car-stoppers. The car-stopper embedding an IoT sensor module has the advantage of easy installation compared to conventional parking sensors buried in ground. The parking status data are transferred to the IoT gateway by the sequential point-to-point communication between the car-stoppers. The data transferred from the IoT gateway are stored in the web server, and parking spaces can be monitored remotely through the Android app in a smart device. An active/sleep cycle method using a watch dog timer is employed to reduce the power consumption of the battery powered car-stopper. The power consumption of the car-stopper is measured to be 80 and 25 mW at the active and sleep mode, respectively. A configuration of ultra-low-power IoT sensor module is proposed to minimize the power consumption in the sleep mode. The operation of the implemented system has been verified in a real-world parking lot.

• Journal of Digital Convergence
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• v.13 no.2
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• pp.291-297
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• 2015

The basic idea of IoT(Internet of Things) is interconnection and cooperation with a variety of things in real life such as Radio-Frequency Identification(RFID) tags, sensors, mobile phone, etc, through internet. IoT technologies which applied to these fields consist of sensor network technology and middleware, application. Currently, IoT technology is applied to various fields such as health care, home care, automotive, transportation, construction, agriculture, environment, food, and etc, based on its technologies. This paper focuses on discussion of the IoT development trend in game field. In order to achieve this purpose, first, the IoT technologies for game development based on sensor network technology and middleware, application is mentioned. Second, covers serious game and gamification that is expected to be a growing that is expected to be a growing, by applying IoT technologies to the game field. It can help for game developers by using IoT technologies.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.5
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• pp.31-37
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• 2018

When an IoT system is constructed, a dashboard is also developed to monitor the values of sensors in the IoT System. Much time and money, however, are spent in developing the dashboard software. This paper presents design and implementation details of a dashboard maker called as YellowPeach, which helps to create a dashboard easily and fast without programming. Using YellowPeach, the user can author a dashboard by putting predefined charts to display values of sensors in it, and store the dashboard as a JSON file. Also an web application has been developed to run the dashboard on the web browser. The dashboard viewer web application connects on MQTT-based IoT system, receives values from the sensors, and displays the values on charts in real-time.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.04a
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• pp.994-996
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• 2016

글로벌 비즈니스 시장에서 IoT 산업은 급속도로 성장하고 있고 IoT에 대한 많은 연구가 진행되고 잇다. 그 중에서 스마트 홈 IoT 시스템이 대표적이며 이를 상용화하여 서비스를 제공하는 업체도 증가하고 있다. 홈 내부에 여러 IoT 장치와 센서들을 설치하고, 해당 장치와 센서에서 지속적으로 데이터가 생성되고 생성된 데이터를 저장하여 사용자에게 새로운 정보를 제공할 수 있다. 특히, 홈 내부에 설치된 여러 센서들의 데이터를 이용하여 현재 홈 내부 상황을 추론하여 집안 내부의 상황을 사용자에게 알려줄 수 있다. 본 논문에서는 스마트 홈 IoT 데이터를 베이지안 네트워크를 이용해 집안 내부의 쾌적 상황을 추론하여 사용자에게 정보를 제공하고 상황에 따른 행동을 할 수 있도록 정보를 제공하는 방법에 대한 연구의 결과에 대하여 소개한다.

• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.37-38
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• 2015

최근 안드로이드 4.0 이상 버전에서 저전력 블루투스(Bluetooth Low Energy) 기능이 지원되면서, 다양한 응용사례가 나타나고 있다. 이러한 BLE 프로토콜을 활용하는 Sensor-Tag IoT 센서노드를 활용하면 스마트홈, 웨어러블, 스마트카, 생활밀착 서비스, 스마트에너지, 산업 및 환경분야에서 다양한 스마트폰 앱을 개발할 수 있다. 또한, BLE-스택(Stack)TM 소프트웨어를 사용하면, 라이센서 걱정없이 펌웨어 소스코드의 개발 및 업데이트가 가능하다. 따라서, 다양한 센서가 장착된 IoT Sensor 노드를 통하여, 습도/온도/가속도/지자기/자이로 등의 데이터를 수집하여 활용할 수 있다. 이에 본 논문에서는 "저전력 센서 노드를 사용한 IoT 서비스 설계 프레임워크"를 제안한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.01a
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• pp.77-78
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• 2018

인터넷과 사물의 결합이 급속도로 진행되며 IoT(Internet of Things, 사물인터넷)의 활성화 역시 앞당겨지고 있다. 최근 IoT 기술 및 서비스와 관련하여 가정, 공장 등의 다양한 장소와 공기청정기, 체온계 등의 제품에도 IoT 기술이 접목된 서비스가 제공되고 있다. 본 논문에서는 일반목적의 IoT 허브인 R.Box의 센서 네트워크와 R.Box와 센서를 통제, 제어하며 데이터 저장과 간단한 통계를 확인할 수 있는 CMS(Content Management System) 기능을 하는 서버 구현에 대해 설명한다. R.Box는 라즈베리 파이를 이용해 제작되었으며 사용자는 서버에 접속해 R.Box와 센서의 정보, 측정된 값을 확인하고 수정, 삭제, 검색 등의 기능을 사용할 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1804-1806
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• 2015

넓은 공간에 대한 물리량 감시응용에서는 다수의 IoT센서가 분산될 수 있으며, 개별 센서의 데이터를 식별하는 것 못지않게 총량의 통계적 변화를 직관성 있게 판단할 수 있도록 돕는 데이터 시각화 도구가 필요하다. 본 연구에서는 라즈베리파이를 IoT센서로 보고, 분산된 복수의 IoT센서들로부터 현장의 물리량 측정값을 모아, 사용자가 단말을 통해 현장의 물리량 변화 상황을 직관성 있게 판단할 수 있도록 돕는 시각화 컴포넌트를 개발하였다. 본 논문에서는 이러한 목적의 시각화 컴포넌트를 브라우저에 독립적인 구현을 지원하도록 HTML5 기반 웹 컴포넌트를 개발하였다.

• Journal of Advanced Navigation Technology
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• v.19 no.4
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• pp.330-337
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• 2015

A service in the environments of internet of things (IoT) exist various types with automation facilities and sensors. There can configure so many communication protocols to networking facilities and sensors. To provide efficient various kind of service, a middleware platform, is based on the internet protocol network, is needed a unified access with devices, controlling and monitoring huge kind of facilities and sensors, to provide a efficient IoT service and application configurations. In this paper, we propose a middleware that an application and service interact with automation facilities and monitor sensors. The proposed middleware is designed with adapter pattern that one of the software engineering design pattern. The adapter pattern is to ensure communication with each sensor and to make sure of service scalability. Finally, the proposed component middleware shows that variety sensors can be easily configure the service in the IoT environment.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.887-888
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• 2016

Internet data for IoT(Internet of Things) period was changed in such a way that the data is done by sharing information for the user. However, in the existing system IoT environment for the user to utilize the system it has a problem does not take into account the individual characteristics. And there must be an intermediate vectors are capable of controlling problems such as Dongle. In this paper, through the flow sensor control applications as a way to solve this problem to control the flow of the sensor according to the characteristics desired by the user. Due to this makes it possible to easily manage the sensor compared to conventional IoT environment. Accordingly, the user must manage the sensor through the application regardless of time and place. So it is believed to reduce the unnecessary power consumption is possible effective control sensor.