• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.243-246
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• 2020

스마트 홈 시스템은 앞으로도 계속 기술의 발전과 수요가 증가하는 블루오션 시장이다. IT 시장의 주목을 받는 아이템을 다룬 만큼 이 작품이 높은 발전 가치와 시장성을 보유하고 있다고 볼 수 있다. 스마트 홈 시스템 구축을 통해 개인에게 최적화 된 라이프 스타일을 구축하고, 더 나아가 개인에게 맞는 환경을 설정하여 맞춤 라이프 연계 서비스를 제공한다. 더 나아가 주목받는 이슈인 인공지능 기술을 사용하여 스마트 기기들에 대한 지능형 제어 및 효율적인 관리가 가능하도록 한다. 게이트웨이 서버에 에어컨, 공기청정기 등 우리 실생활과 밀접한 기기들에 연결함으로써 기존의 기기들에 비해 중요한 기기들을 더 높은 빈도로 관리할 수 있다. 이 프로젝트는 스마트 홈의 기본이 되는 통합 제어시스템과 이를 위한 IoT 허브 시스템의 하드웨어를 모두 개발한 프로젝트로써 게이트웨이 서버로 대표 되는 하드웨어를 통해 스마트 기기의 상태를 모니터링 하다가, 특정 센서값을 받으면 액션을 취해줌으로써 스마트기기를 제어할 수 있다. 그리고 이들과 관련하여 IoT 기반의 다양한 기기들을 표준화 제어하기 위한 제어 시스템을 구축하고 이를 위한 소프트웨어도 함께 개발했다.

• Journal of the Korea Convergence Society
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• v.7 no.4
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• pp.39-44
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• 2016

Due to the dazzling development of IT in this IT-oriented era, information delivering technology among objects, between objects and humans, and among humans has been actively performed. As information delivery technology has been actively performed, IoT became closely related to our daily lives and ubiquitous at any time and place. Therefore, IoT has become a part of our daily lives. CoAp, a web-based protocol, is mostly used in IoT environment. CoAp protocol is mostly used in the network where transmission speed is low along with the huge loss. Therefore, it is mostly used in IoT environment. However, there is a weakness on IoT that it is weak in security. If security issue occurs in IoT environment, there is a possibility for secret information of individuals or companies to be disclosed. If attackers infect the targeted device, and infected device accesses to the wireless frequently used in public areas, the relevant device sends arp spoofing to other devices in the network. Afterward, infected devices receive the packet sent by other devices in the network after occupying the packet flow in the internal network and send them to the designated hacker's server. This study suggests counter-attacks on this issues and a method of coping with them.

• Journal of KIISE
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• v.42 no.11
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• pp.1441-1451
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• 2015

As one of the most spotlighted research areas, these days, the Internet of Things (IoT) aims to provide users with various services through many devices. Since there exist so many devices in IoT environments, it is inefficient to manually configure the domain name system (DNS) names of such devices. Thus, for IPv6-based IoT environments, this paper proposes a scheme called the DNS Name Autoconfiguration (DNSNA) that autoconfigures an IoT device's DNS name and manages it. In the procedure for generating and registering an IoT device's DNS name, the standard protocols of the Internet Engineering Task Force (IETF) are used. Since the proposed scheme resolves an IoT device's DNS name into an IPv6 address in unicast through a DNS server, it generates less traffic than multicast-based mDNS (Multicast DNS) which is a legacy DNS application for the DNS name service in the smart home. Thus, the proposed scheme is more appropriate in multi-hop IoT networks than mDNS. This paper explains the design of the proposed scheme and its service scenarios, such as smart home and smart road. It also explains the implementation and testing of the proposed scheme in the smart grid.

• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.10
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• pp.1139-1144
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• 2015

The internet of things(: IoT) which could produce new information as well as service through connecting small devices with internet interface becomes reality and could be utilized in home, office and plant. Especially the IoT can provide our home for safety, security, convenience, and power saving since all devices form a small internet. This paper proposes an IoT prototype for home with Raspberry Pi which has various sensors and monitors environment. This Raspberry Pi sensor node is small and inexpensive but can provide powerful service. The implemented node goes beyond simple role of sensor node and features a kind of sensor web node which performs various functions to outer network. So the proposed IoT prototype can provide flexibility as well as extensibility since it does not need expensive server.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.803-804
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• 2016

With the advent of Germany's Industry 4.0, research of smart factory to applying the ICT in manufacturing industries is in progress. But the current system controlled equipment using the data declared in the embedded systems. In this paper, we proposed equipment control method to implement smart factory based on IoT. This method is create D/B table of data declared in equipment. and equipment shall call all of control unit parameters. When using the present method, it is possible to efficiently control the number of equipment as less network resource. Also It can operating a factory efficiently.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.309-310
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• 2018

Recently, the systems for managing the labs provide services that can be managed in real time by using various sensors based on IoT. The system collects sensor data and transmits it to the server, identifies the dangerous situation, and sends operation commands to the devices. These systems have a centralized structure that slows data processing when managing multiple laboratories. To solve this problem, this paper proposes a system that manages laboratories in distributed processing environment to identify and manage risk situations. The sensor module is used to control the laboratory and to automatically identify and respond to the dangerous situation.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.358-360
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• 2019

IoT(Internet of Thing) 기술이 현대인들의 생활 속 깊숙이 자리함에 따라, 삶을 보다 편리하게 해 줄 IoT 기술이 각광받고 있다. 본 시스템은 이러한 IoT 기술을 이용하여 관상어마다 적합한 환경 관리를 도와주고 더 나아가 모바일 어플리케이션을 통해 어항의 환경을 원격으로 제어할 수 있도록 하는 스마트 어항 서비스를 구축하였다. 보편적으로 많이 사용되는 Android 기반 운영체제 어플리케이션 및 아두이노와 라즈베리파이와 같은 마이크로컨트롤러(MCU)를 이용하여 시스템을 구현하였으며, 이들은 AWS 서버를 통해 값을 주고받는다. 데이터베이스에서는 자동으로 어항을 관리하는데 필요한 정보들이 저장되어 있으며, 저장된 정보를 사용하여 전체적인 자동 먹이 지급 및 수질 관리 알고리즘이 작성되었다.

• Journal of the Institute of Electronics and Information Engineers
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• v.54 no.4
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• pp.35-43
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• 2017

In this paper, we propose indoor IoT monitoring system based on visible light communication using smart phone with attracting attentions in recent wireless communication. The main features and contributions of the proposed system developed in this paper are as follows. First, the actual data generated within indoor can be processed via the server by using only the visible light communication. Second, the collected data by using the visible light communication can be monitered by smart phone. Performance evaluation of the proposed system is performed under illumination of the normal fluorescent lamps. We first check successful transmission between transmitting module and receiving module of the data collection system. The monitoring system is tested according to the change of the degree of condensing and distance of the LED and the decoding success rate of the proposed smart phone application. We expect that the proposed system can be applied for indoor and outdoor IoT areas together.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.21 no.2
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• pp.125-130
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• 2021

Implementation of livestock smart-farm can be done more effectively with IoT technology developing. An build of useful stock management system can be possibile if push messages of these judgement are notified on smart-phone after cattle's illness and estrus are judged using IoT technology. These judgement method of cattle's illness and estrus can be done with gathering living stock data using temperature sensor and 3 axis acceleration sensor and sending these data using IoT and internet network into server, and studying AI machine learning using these data. In this paper, to build this cattle management system based on IoT, effective system of the whole architecture is showed. Also an effective analysis and design method to develop this system software will be presented by showing user requirement analysis using object-oriented method, flowchart and screen design.

• The Journal of the Korea institute of electronic communication sciences
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• v.18 no.6
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• pp.1239-1244
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• 2023

In this study, we developed an IoT-based management system to manage a can/PET crusher. Various sensors such as two load cells, DHT22 temperature and humidity sensor, and fine dust meter were interfaced with ESP32 to construct an IoT device, and a management server was built using Node-RED. The system monitors the weight of pressed cans and shredded PET bottles in real time and sends a text message to the manager when the weight exceeds the predetermined threshold for timely collection. The results of the operational test confirmed that the system provides accurate monitoring and efficient notification functions, and offers the possibility of solving environmental problems by improving the efficiency of waste management such as cans and PET bottles.