• Journal of Convergence for Information Technology
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• v.10 no.11
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• pp.23-29
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• 2020

As IoT devices increase exponentially, minimizing MIMO interference and increasing transmission capacity for sending and receiving IoT information through multiple antennas remain the biggest issues. In this paper, secret key-level distribution mechanism using deep learning is proposed to minimize MIMO-based IoT communication noise. The proposed mechanism minimizes resource loss during transmission and reception process by dispersing IoT information sent and received through multiple antennas in batches using deep learning. In addition, the proposed mechanism applied a multidimensional key distribution processing process to maximize capacity through multiple antenna multiple stream transmission at base stations without direct interference between the APs. In addition, the proposed mechanism synchronizes IoT information by deep learning the frequency of use of secret keys according to the number of IoT information by applying the method of distributing secret keys in dimension according to the number of frequency channels of IoT information in order to make the most of the multiple antenna technology.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.244-247
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• 2016

Internet of Things spotlighted by the recent growth of the country: the interest in (IoT Internet pf Things) is being maximized. According to the scale of the 2013 Machina Research 2022 yireundago IoT market it is predicting about $ 1.2 trillion. Also the number of IoT devices connected simultaneously to the 2020 worldwide reached about 2.1 billion, and is expected to require about 200 million communications link. Many of these devices in order to manage and operate them efficiently IEEE 802.15.4e, D2D, Beacon, supporting protocols such as Zigbee gateway and network Connectivity to the urgent need for a proactive response to M2M -based operating convert it to a standard protocol being. This paper supports a variety of devices with different protocols and propose the design of intelligent Gateway with integrated features to manage operations.

• Journal of IKEEE
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• v.23 no.2
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• pp.508-516
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• 2019

Smart home with various IoT devices provides convenient and efficient services. However, security is important because sensitive information such as private video and audio can be collected and processed, as well as shared over the Internet. To manage such smart home IoT devices, we use blockchain technology that provides data integrity and secure management. In this paper, we utilize a PoS(Proof of Stake) method that verifies the block through the accumulated stake in the network rather than the computation power, out of the PoW(Proof of Work) block chain, in which the computation for the existing verification must be continuously performed. Among them, we propose a blockchain based system with DPoS(Delegated Proof of Stake) method to actively solve the scalability part, for security that is suitable for smart home IoT environment. We implement the proposed system with DPoS based EOSIO to show realization, and we show performance improvement in terms of transaction processing speed.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.217-218
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• 2018

현재 IoT(Internet of Things) 기술은 전 세계적으로 작은 소모성 장치부터 대형 산업 시스템까지 일상생활의 넓은 영역에서 많은 영향을 미치고 있다. 일상생활의 측면 중 오락, 스포츠, 의료, 자동차, 주거, 산업설비 등 다양한 분야에서 다뤄지고 있다. 이러한 시장의 흐름상 다양한 IoT 프레임워크들은 애플리케이션 구현의 단순화와 빠른 데이터 처리에 중점을 둔다. 본 논문에서는 IoT 환경에서의 분산 프레임워크를 구현하기 위해 삼성 SmartThings와 구글 Weave 두 가지 IoT 프레임워크를 구현되어진 아키텍처를 중심으로 조사한다.

• Journal of Advanced Navigation Technology
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• v.24 no.2
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• pp.67-72
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• 2020

Satellite communication is not used by many people like mobile communication, but it is a necessary technology for public service and communication services, such as providing the Internet in military, disaster, remote education and medical services, island areas, and infrastructure vulnerable areas. However, on ships and aircraft, mobile communications requiring base stations are either unavailable or restricted in their use. In this paper, we used a Raspberry Pi board as the terminal device to communicate network through satellite modem and PPP protocol, and implemented two-way data link using the text message of the modem to connect to the Thuraya geo-stationary orbit network. In addition, I/O devices were connected to the controller of the terminal equipment to design and implement an IoT device system for ships that can remotely access the system under control and control I/Os and transmit measured data through various sensors.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.01a
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• pp.173-174
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• 2020

본 논문에서는 IoT(Internet of Things)와 릴레이(Relay)를 활용한 어항관리 시스템을 개발하였다. 기존의 어항관리시스템(Fishbowl Management System)은 가격이 높거나, 호환성이 떨어지기 때문에 개인이 도입하기에는 어려운 점이 있었다. 본 논문에서 제시하는 어항관리 시스템은 이러한 기존 시스템들의 단점을 극복하고 더 효율적인 어항 운영을 위한 대안으로서 제시된다. 가격이 낮은 미니컴퓨터와 웹 서버, 그리고 릴레이를 이용하여 장치를 제어함으로써 호환성 부족의 문제를 개선하여 어항에 사용되는 장치의 제약을 줄였다. 또한 웹 서버와 외부 데이터베이스 서버를 두어 어항의 상태를 관리, 기록할 수 있어서 어항 운영의 안정성을 높였다.

• Journal of Internet of Things and Convergence
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• v.10 no.2
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• pp.77-84
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• 2024

Over the past few years, IoT edges have begun to emerge based on new low-latency communication protocols such as 5G. However, IoT edges, despite their enormous advantages, pose new complementary threats, requiring new security solutions to address them. In this paper, we propose a cloud environment-based IoT edge architecture model that complements IoT systems. The proposed model acts on machine learning to prevent security threats in advance with network traffic data extracted from IoT edge devices. In addition, the proposed model ensures load and security in the access network (edge) by allocating some of the security data at the local node. The proposed model further reduces the load on the access network (edge) and secures the vulnerable part by allocating some functions of data processing and management to the local node among IoT edge environments. The proposed model virtualizes various IoT functions as a name service, and deploys hardware functions and sufficient computational resources to local nodes as needed.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.1
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• pp.187-192
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• 2020

It is very useful because we can measure precise exercise volume at indoor and outdoor space, and receive push message and retrieve for exercise information by smart-phone at any-time and any-place if a fitness healthcare system base on IoT is utilized. This system is interlocked with IoT module including sensing device in sports equipment, IoT gateway, smart-phone, smart-band and server by internet. In this paper, when this, "a fitness healthcare system base on IoT", software is developed, a proper analysis and design method for practical affairs try to be presented due to showing software development analysis method and design method such as flowchart and UI design.

• Journal of Software Assessment and Valuation
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• v.15 no.1
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• pp.123-131
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• 2019

The Internet of Things (IoT) environment must be able to meet the needs of users by providing access to various services that can be used to develop diverse user applications. However, QoS issues arise due to the characteristics of the IoT environment, such as numerous heterogeneous devices and potential resource constraints. In this paper, we propose a QoS prediction method that reflects trust between users in SOA based IoT. In order to increase the accuracy of QoS prediction, we analyze the trust and distrust relations between users and identify similarities among users and predict QoS based on them. The centrality is calculated to enhance trust relationships. Experimental results show that QoS prediction can be improved.

• The Journal of Korean Institute of Next Generation Computing
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• v.13 no.4
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• pp.90-99
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• 2017

The service structure of the Mobius IoT platform, which has been developed on the basis of the oneM2M standard, connects servers and gateways directly to exchange data using HTTP or MQTT. Such structure may cause problems not to operate IoT services safely. In this paper, we propose an effective structure to manage sessions between gateways (or devices) and server using SIP safely and stably. In addition, we provide the way to implement the proposed method on Mobius IoT platform. To verify the operation of the proposed method, we actually implement the proposed method on Mobius IoT platform, and construct a testbed for a typical IoT application service environment with SIP servers. The results of the experiment show that the proposed method works normally, and it can contribute to the stable operation of IoT services.