• Journal of Convergence for Information Technology
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• v.9 no.3
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• pp.140-145
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• 2019

With the development of IT technology, many changes are taking place in the health service environment over the past. However, even if medical technology is converged with IT technology, the problem of medical costs and management of health services are still one of the things that needs to be addressed. In this paper, we propose a model for hospitals that have established the IoT system to efficiently analyze and manage the personal information of users who receive medical services. The proposed model aims to efficiently check and manage users' medical information through an in-house IoT system. The proposed model can be used in a variety of heterogeneous cloud environments, and users' medical information can be managed efficiently and quickly without additional human and physical resources. In particular, because users' medical information collected in the proposed model is stored on servers through the IoT gateway, medical staff can analyze users' medical information accurately regardless of time and place. As a result of performance evaluation, the proposed model achieved 19.6% improvement in the efficiency of health care services for occupational health care staff over traditional medical system models that did not use the IoT system, and 22.1% improvement in post-health care for users who received medical services. In addition, the burden on medical staff was 17.6 percent lower on average than the existing medical system models.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.261-264
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• 2018

As the application of IoT has diversified, there is a growing need to store information of sensors on servers in real time. However, building servers and collecting data requires a lot of money to secure existing PCs and storage space. This paper presents an easy way to build a cloud system at a low cost. This system presents the process of simply proposing and implementing a cloud system using Raspberry which is open hardware and Node-Red which is open software.

• The Journal of the Convergence on Culture Technology
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• v.9 no.6
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• pp.1001-1006
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• 2023

Globally, rising energy costs and increased energy demand are important issues for the food processing and manufacturing industries, which consume significant amounts of energy throughout the supply chain. Accordingly, there is a need for the development of a real-time energy monitoring and analysis system that can optimize energy use. In this study, a food factory energy monitoring system was proposed based on IoT installed in a food factory, including monitoring of each facility, energy supply and usage monitoring for the heat treatment process, and search functions. The system is based on the IoT sensor of the food processing plant and consists of PLC, database server, OPC-UA server, UI server, API server, and CIMON's HMI. The proposed system builds big data for food factories and provides facility-specific monitoring through collection functions, as well as energy supply and usage monitoring and search service functions for the heat treatment process. This data collection-based energy monitoring system will serve as a guide for the development of a small and medium-sized factory energy monitoring and management system for energy savings. In the future, this system can be used to identify and analyze energy usage to create quantitative energy saving measures that optimize process work.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.1153-1156
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• 2017

이 논문에서는 투자비용 감소를 위해 라즈베리파이와 아두이노로 구현한 IoT 플러그를 제안한다. 기존 연구에서는 노후화된 시설에 대해 큰 비용이 발생하며, 전력소모량을 측정하는데 오차가 있다. 노후 시설에 대한 투자비용을 줄이기 위해 가격이 저렴한 라즈베리파이와 아두이노를 이용하여 IoT 플러그를 구현한다. 라즈베리파이 상에 서버를 구현하고 사용자와 nodeMCU 사이의 통신을 담당한다. nodeMCU는 릴레이모듈과 스위치에 연결되어 자동/수동으로 전원을 제어할 수 있다.

• Journal of Industrial Convergence
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• v.20 no.8
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• pp.61-67
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• 2022

The Internet of Things(IoT) is one of the key technologies in the Fourth Industrial Revolution. The IoT is a system that acquires information from various sensors and provides meaningful information to users. The method of obtaining information from sensor is using WIFI, Bluetooth and Server. is not accessible to external users because of different type of networks or local area communication. For this reason, there is a problem that external user cannot receive notification in regard to sensor information. In this paper, we want to establish a cloud message environment using Google's FCM(Firebase Cloud Messaging) and find out through experiments how users can receive notifications even if they are outside.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.262-265
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• 2020

최근 현대인에게는 질좋은 숙면이 필수적이다. 건강한 숙면을 위해서는 편안한 수면환경이 중요하므로 IoT베개와 매트는 개개인에게 맞는 수면 자세를 잡아 효율적으로 현대인들의 수면의 질을 높여줄 것이다. IoT의 베개의 센서가 머리의 움직임과 방향을 실시간으로 모니터링하여 설치된 장치가 자세를 바로잡아주고 장치와 연동된 앱을 통하여 수면의 종류와 패턴, 수면 시간을 상세분석하는 체계적인 맞춤형 수면 관리를 통해 수면 건강정보를 제공할 것이다. 또한, 수면 건강정보를 서버에서 종합하여 각 가정의 환자의 상태를 모니터링하여 원격진료가 가능하다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.01a
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• pp.241-242
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• 2020

홈/개인 IoT 환경에서 모바일 기기나 유무선 공유기는 IoT 기기의 트래픽을 중계하는 경우가 많다. 본 논문에서는, 홈/개인 IoT 환경에서 IoT 기기들이 서버로 전송한 패킷들을 프라이버시 보호 측면에서 더 안전하게 상류로 전송하는 기능을 제공하는 트래픽 자동 분류기반의 상류 프라이버시 보호 계층을 제안한다. 트래픽의 목적지 주소를 기반으로, 직접 연결, 프락시를 통한 연결, VPN을 통한 연결, Tor 익명 네트워크를 통한 연결 방식 중 하나를 선택하고, 선택된 연결 방식으로 상류로 패킷을 전달한다. 별도의 사용자 인터페이스를 통해 목적지 주소 및 적합한 연결 방식을 설정할 수 있다. 제안 계층은 모바일 기기 및 유무선 공유기에 적용 가능하며, 현재 모바일 기기용 개념 증명 예제를 구현하였다.

• The Journal of the Korea institute of electronic communication sciences
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• v.18 no.6
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• pp.1087-1094
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• 2023

Due to the development of technologies, such as big data, cloud, IoT, and AI, The high data throughput is required, and the importance of network flexibility and scalability is increasing. However, existing network systems are dependent on vendors and equipment, and thus have limitations in meeting the foregoing needs. Accordingly, SDN technology that can configure a software-centered flexible network is attracting attention. In particular, a load balancing method based on SDN can efficiently process massive traffic and optimize network performance. In the existing load balancing studies in SDN environment have limitation in that unnecessary traffic occurs between servers and controllers or performing load balancing only after the server reaches an overload state. In order to solve this problem, this paper proposes a method that minimizes unnecessary traffic and appropriate load balancing can be performed before the server becomes overloaded through a method of assigning weights to servers in stages according to server load.

• Convergence Security Journal
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• v.19 no.5
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• pp.107-118
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• 2019

Based on the Internet of Things technology, one of the core technologies of the fourth industrial revolution, our Ministry of Defense is also pushing to establish M-IoT in defense area to improve management efficiency, innovate military culture and strengthen military power. However, devices connected to the Military Internet of Things can be easily exposed to various of cyber threats as most of them are developed and with a focus on improving sensing and communication skills that collect and transmit data. And it is not easy to uniquely identify the numerous heterogeneous devices, and to establish a secure communication channel between devices or between devices and management servers. In this paper, based on PUF technology, we propose a novel key management scheme that can uniquely identify the various devices, and generate the secret keys needed for the establishment of a secure communication channel using non-replicable information generated by the PUF. We also analyze the efficiency of our proposed scheme through comparison with existing key management scheme and verify the logic and security using BAN Logic.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.485-487
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• 2017

With the growth of the IoT, security is a growing concern. Things the risk of IoT security has been constantly raised, and there have been many cases of hacking. As a result, there is a growing concern and scale about security, but there is a lack of interest and research on the message protocols between Iot devices. With the development of the IoT, the importance of low-power, lightweight and accurate message delivery will become more important and more advanced message protocols will be needed. In this paper, it is aimed to construct the system for communication between client and server of MQTT and CoAP with Confirmative option, which are most used among IoT message protocols and compare the message reliability of each communication protocol to check efficiency.