• Electronics and Telecommunications Trends
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• v.29 no.4
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• pp.82-90
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• 2014

우리 사회는 산업혁명, 정보화혁명을 거쳐, 모든 것이 인터넷과 연결되는 사물인터넷(Internet of Things) 기반의 초연결 혁명 진행 중에 있다. 이에 정부는 사물인터넷을 공공, 산업, 개인 등 국가사회 현안 해결의 수단으로 활용하여 산업경쟁력 강화 및 창의적 IoT 서비스 제품 창출과 중소 중견 전문기업 육성을 시도하고 있다. 이에 본고에서는 사물인터넷의 핵심인 단말 플랫폼기술에 대한 글로벌 기업 및 프로젝트들의 하드웨어와 소프트웨어 융합기반 사업화 동향을 분석하고, 국내 단말 플랫폼의 개발현황 및 문제점을 살펴본다. 뿐만 아니라, 향후 사물인터넷의 단말 플랫폼 경쟁력 확보 및 생태계 구축을 위한 단말 소프트웨어 플랫폼과 하드웨어 플랫폼 구축방법으로 개발자 지향 개방형 SW-SoC(System on Chip) 융합을 통한 인프라 구축방안 제시하고, 사물인터넷 서비스의 확산을 위해 산 학 연 협력기반 기술개발 로드맵 방향을 제시한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.6
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• pp.1191-1196
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• 2017

Lately, the three mobile telecom companies in Korea are competing for the launch of Internet of Things services for using home. Typical launched services are in the smart home related fields. However, Internet of Things as mobile telecom based are at an early stage, expected that various services will be started continuously. At this point, we have been planning to analyze the preference of Internet of Things for objects based on the services already launched. In order to apply the analytic hierarchy method, the first stage factors were designed as Safety, Security, Health care, Intelligence and Home appliances. In addition, the second stage factors were organized into 18 detailed services presented in the conceptual model. As a result, Health care (23.2%) was the most preferred priority. These results can be interpreted as the result of interest in health by improving income. We presented the theoretical and practical implications of these results.

• Journal of Internet Computing and Services
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• v.20 no.5
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• pp.95-104
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• 2019

Various kinds of devices are used for the Internet of Things (IoT) service, and IoT devices mainly use communication technology that uses the frequency of the unlicensed band. There are several types of communication technology in the unlicensed band, but WiFi is most commonly used. Devices used for IoT services vary in computing resources from devices with limited capabilities to smartphones and provide services over wireless networks such as WiFi. Most IoT devices can't perform complex operations for network control, thus they choose a WiFi access point (AP) based on signal strength. This causes a decrease in IoT service efficiency. In this paper, an intelligent AP system that can efficiently control the WiFi connection of the IoT devices is implemented. Based on the network information measured by the IoT device, the access point learns using a feed forward neural network algorithm, and predicts a network connection state to control the WiFi connection. By controlling the WiFi connection at the AP, the service efficiency of the IoT device can be improved.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.740-741
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• 2017

사물인터넷 기술은 다양한 제품과 서비스를 통해 우리생활 곳곳에서 빠르게 현실화되고 있으며, 특히 사물인터넷을 기반으로 하는 스마트홈 시장이 급속도로 성장하고 있는 중이다. 여러 글로벌 제조사들은 이러한 흐름에 따라 스마트홈 서비스를 주축으로 소비자 중심의 다양한 스마트홈 제품들을 출시하고 있다. 그러나 현재 스마트홈은 제조사마다 독립적인 플랫폼을 개발하고 이에 연동되는 특정 디바이스 및 서비스만 제공하기 때문에 소비자 입장에서는 폐쇄적인 시스템이라 할 수 있다. 본 논문에서는 단순히 스마트홈 디바이스의 제어뿐만 아니라 IFTTT 플랫폼과 연동하여 자동화 서비스를 지원하고, DIY 제품을 등록하여 사용자 환경에 따라 커스텀 디자인이 가능하도록 하는 스마트 홈서비스 서버를 설계하였다.

• Journal of KIISE
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• v.42 no.11
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• pp.1423-1429
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• 2015

The Internet of Things (IoT) is a new concept associated with the future Internet, and it has recently become a popular concept to build a dynamic, global network infrastructure. However, the deployment of IoT creates difficulties in satisfying different Quality of Service (QoS) requirements and achieving rapid service composition and deployment. In this paper, we propose a new QoS control scheme for IoT systems. The Markov game model is applied in our proposed scheme to effectively allocate IoT resources while maximizing system performance. The results of our study are validated by running a simulation to prove that the proposed scheme can promptly evaluate current IoT situations and select the best action. Thus, our scheme approximates the optimum system performance.

• Journal of Advanced Marine Engineering and Technology
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• v.40 no.6
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• pp.542-547
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• 2016

In recent times, Internet of Things (IoT) has attracted wide attention, and there are increasing requests for IoT application services. Open-Source Hardware (OSH) utilizes a variety of components that are created through the sharing of hardware design so that others developers can also work on it. The concept of "open source" that attracted attention in the software industry has been applied to the hardware field by the emergence of IoT market. The emergence of OSH that has the advantage of low hardware cost and faster development encourages the idea of a diverse IoT application services. In this paper, we describe an IoT application service system that is developed using the OSH platform Arduino and Raspberry Pi to process collection, exchange, and computation of the environmental information. The overall system architecture and hardware and software components are presented.

• Journal of the Korea Convergence Society
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• v.10 no.1
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• pp.45-51
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• 2019

The use of the Internet of things plays a major role in the Fourth Industrial Revolution, and a series of tasks of accumulating, converging, analyzing and reusing various data and services becomes very important. Because the pace and scope if the paradigm shift in Fourth Industrial Revolution is so rapid and unpredictable, the development and utilization of a system to fulfill this role for IOT are urgently required. In this paper, we introduce the Web-based IOT management system, which connects the IOT with OKMindmap, which is a domestic open source software and service, and the Node-RED service. This system combines the advantages of OKMindmap with the advantages of Node-RED, which is capable of visual component based programming, so that it can easily and flexibly connect the IOT based on Web browsers, and various data and services can be integrated and linked. We developed a camera module, a temperature and humidity sensor module, and the motor control module in Raspberry PI basically, and tested the operation successfully. We plan to extend the IOT component gradually by using Arduino and System On Chip.

• Journal of Internet of Things and Convergence
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• v.2 no.1
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• pp.17-21
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• 2016

The rapid development of IoT leads new kinds of services which does not existed. And, it requires several changes on existing network. Software Defined Network is one of the future network technology which can deal with problems from these kinds of changes. The strong point of Software Defined Network is flexibility and scalability. However, In some cases, these factors could be the security vulnerabilities. In this paper, we present adaptation of F(I)MEA technique for the security analysis on Software Defined Network Technology for IoT services.

• Information and Communications Magazine
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• v.33 no.5
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• pp.55-64
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• 2016

최근 구글, 애플, 아마존 등의 글로벌 기업들이 사물인터넷 서비스를 위한 개방형 플랫폼 제공 및 관련 생태계 확보에 나선 가운데, 국제표준단체의 표준화 추진, 기업들간의 협력을 통한 얼라이언스 표준 등 다양한 형태의 표준 기술 개발이 진행되고 있다. 표준기술의 다양화는 사물인터넷의 다양한 서비스 분야에 대한 표준화가 진행되는 긍정적인 측면과 더불어 표준기술간의 연동이 필연적으로 요구된다. 본고에서는 최근 구현 가능한 수준으로 개발된 사물인터넷 관련 대표적인 표준기술에 대하여 간략히 살펴보고, oneM2M에서 표준화가 진행중인 이들 표준간의 연동 표준 기술에 대해서 소개한다. 또한 이러한 표준기술을 활용하여 구현된 사례를 보임으로서 표준간에 실질적인 연동을 통한 서비스 제공의 가능성을 보인다.

• Proceedings of the Korea Contents Association Conference
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• 2018.05a
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• pp.271-272
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• 2018

4차 혁명을 맞으며 최대 키워드인 사물인터넷(IoT)이 부각되면서 다양한 분야의 산업에 IoT 제품들이 소비시장에 등장하고 있다. 사물인터넷(IoT) 기술은 최근 주택의 주거 공간 내에서 삶의 질을 높여주는 스마트홈(Smart Home)에 적용 확대되고 있다. 이에 본 연구는 국내 스마트홈(Smart Home) 기술현황을 분석하고자 하며, 그 분석 대상을 국내 주요 3개의 이동통신사의 스마트홈(Smart Home) 사물인터넷(IoT) 홈 서비스로 한다. 본 연구는 국내 주요이동통신사에서 제공하고 있는 사물인터넷(IoT) 홈서비스의 기술사례를 통해 안전성, 편리성, 절약성 3가지의 유형으로 나누어 분석하였다.