• Journal of Sensor Science and Technology
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• v.30 no.2
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• pp.67-70
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• 2021

A new button-shaped electrical device was developed for a smart fabric. This electric button can be sewn anywhere on the garment, similar to a traditional button fastener. t not only performs a decorative function but also makes the fabric suitable for use in Internet of Things (IoT) applications. It has metallic through-holes such that it can be fastened onto a fabric by conductive sewing threads. When threaded through metallic holes, the button can communicate with the external device by transmitting and receiving data. In addition, it adds specific functions by stacking a detachable application layer on the base layer. It is robust to frequent washing, and thus has excellent repeatability for use as an IoT device. The feasibility of the electric button was successfully demonstrated by its ability to identify the physical activities of walking and running, monitoring ambient temperature, and turning on LED lights.

• Annual Conference of KIPS
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• 2023.11a
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• pp.151-153
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• 2023

Federated learning (FL)-based network intrusion detection techniques have enormous potential for securing the Industrial Internet of Things (IIoT) cybersecurity. The openness and connection of systems in smart industrial facilities can be targeted and manipulated by malicious actors, which emphasizes the significance of cybersecurity. The conventional centralized technique's drawbacks, including excessive latency, a congested network, and privacy leaks, are all addressed by the FL method. In addition, the rich data enables the training of models while combining private data from numerous participants. This research aims to create an FL-based architecture to improve cybersecurity and intrusion detection in IoT networks. In order to assess the effectiveness of the suggested approach, we have utilized well-known cybersecurity datasets along with centralized and federated machine learning models.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.2
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• pp.309-315
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• 2017

Recently it has drawn much attention on the technologies about Internet of Things (IoT) which connects objects with constrained resource and heterogenous communication module in order to communicate information via internet. We propose a real-time sensor monitoring system based on IPv6 over Bluetooth Low Energy (BLE), which is included in Bluetooth 4.2 Specification. Since this system uses a publish-subsribe based IoT protocol, so called Message Queueing Telemetry Transport (MQTT), neither transforming network data nor any proxy server is needed in order to transmit data. Through the web client connected to this system, you can monitor sensor data sent by BLE device in real-time, intermediated via MQTT broker and then delivered to the client via HTTP and websocket protocol. In this paper we evaluated network capacity and availability of the implemented test platform. Thus by using this system it is possible to make development cost low and to construct IoT network with heterogenous devices easily.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.4
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• pp.1317-1341
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• 2021

Nowadays, the Internet of Things (IoT) is adopted to enable effective and smooth communication among different networks. In some specific application, the Wireless Sensor Networks (WSN) are used in IoT to gather peculiar data without the interaction of human. The WSNs are self-organizing in nature, so it mostly prefer multi-hop data forwarding. Thus to achieve better communication, a cross-layer routing strategy is preferred. In the cross-layer routing strategy, the routing processed through three layers such as transport, data link, and physical layer. Even though effective communication achieved via a cross-layer routing strategy, energy is another constraint in WSN assisted IoT. Cluster-based communication is one of the most used strategies for effectively preserving energy in WSN routing. This paper proposes a Bio-inspired cross-layer routing (BiHCLR) protocol to achieve effective and energy preserving routing in WSN assisted IoT. Initially, the deployed sensor nodes are arranged in the form of a grid as per the grid-based routing strategy. Then to enable energy preservation in BiHCLR, the fuzzy logic approach is executed to select the Cluster Head (CH) for every cell of the grid. Then a hybrid bio-inspired algorithm is used to select the routing path. The hybrid algorithm combines moth search and Salp Swarm optimization techniques. The performance of the proposed BiHCLR is evaluated based on the Quality of Service (QoS) analysis in terms of Packet loss, error bit rate, transmission delay, lifetime of network, buffer occupancy and throughput. Then these performances are validated based on comparison with conventional routing strategies like Fuzzy-rule-based Energy Efficient Clustering and Immune-Inspired Routing (FEEC-IIR), Neuro-Fuzzy- Emperor Penguin Optimization (NF-EPO), Fuzzy Reinforcement Learning-based Data Gathering (FRLDG) and Hierarchical Energy Efficient Data gathering (HEED). Ultimately the performance of the proposed BiHCLR outperforms all other conventional techniques.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.14 no.3
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• pp.943-961
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• 2020

With the advent of IoT technology and Big Data computing, the importance of WSNs (Wireless Sensor Networks) has been on the rise. For energy-efficient and collection-efficient delivery of any sensed data, lots of novel wireless medium access control (MAC) protocols have been proposed and these MAC schemes are the basis of many IoT systems that leads the upcoming fourth industrial revolution. WSNs play a very important role in collecting Big Data from various IoT sensors. Also, due to the limited amount of battery driving the sensors, energy-saving MAC technologies have been recently studied. In addition, as new IoT technologies for Big Data computing emerge to meet different needs, both sensors and sinks need to be mobile. To guarantee stability of WSNs with dynamic topologies as well as frequent physical changes, the existing MAC schemes must be tuned for better adapting to the new WSN environment which includes energy-efficiency and collection-efficiency of sensors, coverage of WSNs and data collecting methods of sinks. To address these issues, in this paper, a self-organization scheme for mobile sensor networks with mobile multiple sinks has been proposed and verified to adapt both mobile sensors and multiple sinks to 3-dimensional group management MAC protocol. Performance evaluations show that the proposed scheme outperforms the previous schemes in terms of the various usage cases. Therefore, the proposed self-organization scheme might be adaptable for various computing and networking environments with big data.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.5
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• pp.1187-1199
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• 2015

Recently, as high-quality sensors are being developed, it is available to conveniently measure any kind of data. Healthcare services are being combined with Internet of things (IoTs). And applications that use user's data which are remotely measured, such as heart rate, blood oxygen level, temperature are emerging. The typical example is applications that find ideal spouse by using a user's genetic information, or indicate the presence or absence of a disease. Such information is closely related to the user's privacy, so biometric information must be protected. That is, service provider must provide the service while preserving user's privacy. In this paper, we propose a scheme which enables privacy-preserving outlier detection in Healthcare Service.

• Electronics and Telecommunications Trends
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• v.29 no.5
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• pp.18-29
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• 2014

최근 해양안전에 대한 국내외의 관심과 함께 통신기술의 발전, 선박에 다양한 디지털 및 전자장비들이 도입됨에 따라 선박을 위한 전자항법체계인 e-navigation이 주목을 받고 있다. E-navigation은 안전뿐 아니라, 해양에서의 디지털시대의 서막을 여는 IT 융합의 새로운 패러다임을 제공하고 있다. 본 논문에서는 e-navigation과 관련하여 국제해사기구(IMO), 국제항로표지협회(IALA: International Association of Lighthouse Authorities), 국제수로기구 (IHO: International Hydrographic Organization), 국제전기협회(IEC) 등의 관련 기술에 대한 국제표준화기구의 최근 동향에 대해서 살펴볼 것이다. 또한, 한국형 e-navigation에 대한 국내 동향과 함께 최근 각광을 받고 있는 사물인터넷(IoT: Internet of Things) 기술을 해양분야에 적용하기 위한 방안에 대해서도 다루고자 한다.

• 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 Korea Multimedia Society
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• v.18 no.4
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• pp.506-523
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• 2015

The intent is to determine whether or not the custody transfer is helpful for data transmission in challenging underwater communications when running Bundle protocol or underwater protocols. From the point of view defending side, Underwater Acoustic Network (UAN) will be a serious threat for its strong functionality long rang and high precision of surveillance and detection. Therefore, countermeasures must be taken to weaken its effect. Our purpose is analyzed that how to benefit from the UIoT to learn from, exploit and preserve the natural underwater resources. Delay/Disruption Tolerant Network (DTN) is essential part of the network heterogeneity communication network. The vulnerability and potential security factors of UIoT are studied thereafter. Security mechanisms for an underwater environment are difficult to apply owing to the limited bandwidth. Therefore, for underwater security, appropriate security mechanisms and security requirements must be defined simultaneously. The paper consists of mathematical and security model. Most important point of view in the security challenges of effective Buffer and Storage management in DTN.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2019.06a
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• pp.285-287
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• 2019

MPEG - IoMT(Internet of Media Things) 는 사물 인터넷 및 웨어러블 환경에서의 효율적인 미디어 서비스 제공을 위한 데이터 포맷 및 API(Application Programming Interface) 표준을 제공하고 있다. 본 논문에서는 MPEG - IoMT 에 채택된 헬스케어(healthcare) 정보 서술 툴에 대한 IoMT 참조 SW 에서의 검증 실험내용을 기술한다. IoMT 는 의료영상 저장/관리 및 통신을 위한 표준인 DICOM (Digital Imaging a nd Communication in Medical)을 기반으로 의료 미디어 정보를 기술하기 위한 Healthcare Information 스키마(schema)와 이를 기반으로 서술된 정보를 IoT 및 웨어러블 환경에서 활용하기 위한 API 표준을 포함하고 있다. 본 논문에서는 IoMT 참조 SW 를 이용하여 헬스케어 스키마에 따른 헬스케어 정보의 생성 및 파싱(parsing) 을 검증하고, 서술정보를 MThing (Media Thing) 들 간의 교환을 위한 API 에 대한 검증 내용을 보인다.