• Proceedings of the Korea Information Processing Society Conference
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• 2016.04a
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• pp.1011-1012
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• 2016

최근 무선 통신 기술과 센서 디바이스들의 발달로 센서 기반 IoT 환경이 다양한 분야에 활용되고 있다. 하지만, IoT 환경을 구성하는 센서 노드가 소형 하드웨어로 구성되어 있어 메모리, 처리능력, 에너지 등에서 많은 제약사항을 가지고 있다. 따라서, 본 논문에서는 키 없는 해시 함수를 이용하여 센서 노드간 인증 및 키 교환을 경량화 기법을 제안한다. 제안하는 시스템은 숲이나 군사지역 등 사람이 접근하기 어려운 곳에 활용되는 센서 노드들의 배터리 수명을 향상시켜 효율적이고 지속적인 데이터 수집이 가능할 것으로 기대된다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.2
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• pp.211-218
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• 2017

In this study, we implemented IoT Sensor Network using Mobius Platform and implemented four kinds of Z-wave sensors applicable to smart home service to verify its performance. The 12 common service functions (CSF) provided by Mobius enable application services including status monitoring of sensors to be implemented quickly. The standard service procedures and protocols have eliminated the design process of the system and shortened the meeting time for establishing protocol between application software developer, gateway developer and sensor developer, and discussion time for adjustment of opinion. We confirmed that the application service based on the implemented sensor network and the implementation of IoT sensor can shorten the development schedule, and confirmed that most of the products purchased in the market can be accommodated without change. We hope that such speediness and openness will be able to meet the demands of various services and contribute to expanding services and creating new markets.

• The Journal of the Convergence on Culture Technology
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• v.8 no.2
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• pp.355-360
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• 2022

In this paper, we present design and developing method for EMS(environment monitoring system) of micro data center. This developing EMS monitors operating environment of micro data center and analyze sensing data through IoT(Internet of things) sensors in real time. Firstly we present configuration method of IoT sensing package and design method EMS hardware platform. Secondly we design data collector software for data collection of IoT sensor with different protocol and develop monitoring software of EMS. The data collector software consists of sensor collector module and collector manager module. Also we design EMS software which has micro service architecture structural style and component based business logic.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1235-1238
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• 2015

센서 레지스트리 시스템(Sensor Registry System, CRS)은 이기종 센서 네트워크 환경에서 센서 데이터의 일관성 있는 의미 해석을 위하여 센서 메타데이터를 등록하고 관리하는 시스템이다. 최근 사물인터넷(Internet of Things, IoT) 패러다임이 대두됨에 따라 센서 네트워크의 개념 및 이용 목적 등이 변화되고 있으며, SRS 역시 이를 반영하여 센서와 연관된 데이터 모델의 개선 및 확장이 요구된다. 따라서 이 논문은 IoT 환경에서 기존 SRS를 개선하기 위하여 Semantic Sensor Network Ontology(SSNO) 기반의 SRS 데이터 모델을 제안한다. 이를 위하여 IoT 환경에서 SRS의 목적 및 요구사항을 분석하고 SSNO의 개념들 중 필요 요소와 불필요 요소를 반영하여 제안 모델을 설계한다. 또한 생성된 SRS 데이터 모델을 이용하여 관계형 데이터베이스로 구축하고 SRS를 웹 어플리케이션으로 구현한다. 제안하는 SRS 데이터 모델은 기존 모델들에 비해 SSNO 온톨로지를 가장 적합하게 표현하므로 풍부한 의미 처리가 가능하다.

• KIPS Transactions on Software and Data Engineering
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• v.5 no.7
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• pp.313-318
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• 2016

To utilize sensory data, it is necessary to design architecture for processing and handling data generated from sensors in an IoT environment. Especially in the IoT environment, a thing connects to the Internet and efficiently enables to communicate a device with diverse sensors. But Hadoop and Twister based on MapReduce are good at handling data in a batch processing. It has a limitation for processing stream data from a sensor in a motion. Traditional streaming data processing has been mainly applied a MoM based message queuing system. It has maintainability and scalability problems because a programmer should consider details related with complex messaging flow. In this paper architecture is designed to handle sensory data aggregated The designed software architecture is used to operate an application on the open source framework Storm. The application is conceptually used to transform streaming data which aggregated via sensor gateway by pipe-filter style.

• Convergence Security Journal
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• v.15 no.7
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• pp.103-110
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• 2015

The security of the data exchanged between sensor nodes in IoT (Internet of Things) environment becomes increasing. In the conventional IEEE 802.15.4, the key for secure communication between the sensor node and the sensor node and the PAN Coordinator or the sensor node is assumed to be pre-shared in advance. Especially, there is another problem in that sensor node authentication is not considered during the association process. In this paper, we propose a security scheme that solves the problems of previously proposed protocols with the pre-shared key for all devices.

• Journal of Digital Convergence
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• v.15 no.5
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• pp.217-223
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• 2017

With the development of sensor networks and Internet of Things (IoT) technology, personalized context information has been collected and customized services can be provided to related users. Currently, the context information system is at the level of analyzing and recognizing user specific behavioral characteristics and generating events.In the IoT environment, IoT products themselves should provide the required services with minimal user intervention, rather than acting for a specific purpose. In this paper, to minimize the user intervention in the IoT environment, we implemented an automatic attendance recognition system using context information from the ECG based on beacon. Environment of provided specific Context information, we compared and analyzed the degree of user intervention among the authentication method using ECG sensor in this paper and the existing authentication method. As a result of the analysis, we confirmed that the system implemented in this paper minimizes user intervention.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.265-266
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• 2020

본 논문에서는 IoT 기술을 이용한 재난 안전 모니터링 시스템을 제안한다. 기술의 발전으로 개인 통신 기기에도 IoT가 범용적으로 사용되고 있으나 재난 안전 모니터링 시스템과의 접목은 쉽지 않다. 본 논문에서는 IoT 기술 기반 재난 안전 모니터링 시스템을 개인 통신 기기에 접목 시키기 위해 카카오톡 플랫폼을 이용한다. 재난 안전 모니터링 시스템은 평시에 IoT 센서로 온도, 강우량, 진동 및 미세먼지를 모니터링하여 정보를 제공한다. 만약 화재, 폭우, 지진 등의 자연 재난 등이 발생하면 메신저 플랫폼인 카카오톡을 통하여 재난정보를 재난 초기에 제공함으로써 피해를 최소화 하는 것을 목표로 한다.

• Journal of Advanced Navigation Technology
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• v.19 no.5
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• pp.417-422
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• 2015

A service size of the IoT environment is determined by the number of sensors. The number of sensors increase means increases the amount of data generated by the IoT environment. There are studies to reliably operate a network for research and operational dynamic buffer for data when network congestion control congestion in the network environment. There are also studies of the stream data that has been processed in the connectionless network environment. In this study, we propose a sensor gateway for processing big data of the IoT environment. For this, review the RESTful for designing a sensor middleware, and apply the double-buffer algorithm to process the stream data efficiently. Finally, it generates a big data traffic using the MJpeg stream that is based on the HTTP protocol over TCP to evaluate the proposed system, with open source media player VLC using the image received and compare the throughput performance.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.6
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• pp.733-739
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• 2019

Water level measurement is highly demanding in IoT monitoring areas such as smart factory, smart farm, and smart fish farm. However, existing water level indicators are limited to be used in industrial fields as commercial products due to the high cost of sensors and the complexity of algorithms used. In order to solve these problems, our paper proposed methods using an infrared distance sensor as well as a hall sensor for the water level measurement, both of which are contactless smart sensors. Data errors caused by the inaccuracy of existing sensors were decreased by applying new simple structures so that versatility is enhanced. The performance of our method was validated using experiments based on simulations. We expect that our new water depth indicator can be extended to a general-purpose water level monitoring system based on IoT technology.