• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.533-535
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• 2018

In the 21st century, in which the accident rate is rapidly increasing in proportion to the development of automobiles, In order to reduce the number of accidents, this paper was written for the convenience of the elderly people with disabilities and the handicapped. When a driver's safety accidents and various signals are transmitted through a smart phone by voice, the voice signal is processed as a video signal through the rear LED pannel of the vehicle, so that an urgent situation or a current state can be clarified It is also possible to use the local area network as a billboard and I would like to propose a study to show the advertising effect and current traffic situation.

• International Journal of Internet, Broadcasting and Communication
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• v.10 no.2
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• pp.79-83
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• 2018

According to the Korea Robotics Industry Association, the number of robots companies, sales and production are steadily increasing until 2016, and the global robot market outlook is expected to continue to increase until 2025. We need to develop more attention to robots that can make life easier for us and can replace human tasks that we cannot do. It is predicted that robots will be more developed in the future with the above statistics, and future robots will be more activated by robots that can depend on each other, fix each other, and adapt to the changing environment without humans. Therefore, the shape of the robots in the future will be developed as a group robot(swarmbot) that cooperate with each other while the robot works. These robots have been studied for a longtime, but there are only two community robots that are applied in real life, only two of which are jailbreaking robots made in KAIST and KIVA robots made in Amazon company. In the future, as these robots develop more and more, and environment where robots can live without human intervention is created, so that a plurality of robots can collaborate and do individual work.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.427-430
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• 2016

Internet of Things is one of the technologies that become a hot topic in recent years, is a technology that connects objects with wired or wireless network and share a information between objects. Gartner predicts that spread rapidly devices for end users, also increase revenue from enterprise equipment through the Annual 'Internet of Things' reports. By this trend, Internet of Things is becoming the platform of various kinds, the platform and the protocol for that have been developed a new technique. In this paper, we compared the performance of the communication protocol between devices in the Internet of Things, and propose a way to improve performance efficiency.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.10a
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• pp.943-946
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• 2018

본 논문은 공공데이터 API를 활용한 ITS(Intelligent Transport System)를 구현하여, 버스 승하차 관련 문제를 개선하는 버스 승하차 사전 알림 시스템에 관한 것이다. 수도권 및 대도시 전체 버스 관련 민원신고 중 가장 많이 차지하는 부분이 버스의 정류장 무정차 통과 및 승차거부 문제다. 이를 해결하기 위해 사전에 승객의 승하차 여부를 버스 운전사에게 미리 알리는 시스템을 제안한다. 이 시스템은 승객용 애플리케이션, 중앙 서버 그리고 버스에 설치되는 디바이스로 구성되어 있으며 예비 승하차 승객이 애플리케이션을 이용하여 자신이 원하는 버스에 대한 정보를 MQTT Broker를 이용하여 서버에 보내고 서버는 해당 버스의 정보와 현재 노선의 운행 현황을 주기적으로 확인하여 요청 정류장 이전에 도달하였을 때 버스 운전자 측 디바이스에 신호를 보내어 버스 운전자가 예비 승하차 승객이 있음을 사전에 알 수 있게 한다. 이 시스템을 통해 무정차 및 승차거부 문제를 근본적으로 해결하여 사용자 편의 승객 안전 일반 차량 운전자 안전 도로 교통 안정화를 도모한다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.2
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• pp.103-109
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• 2019

Due to the development of ICT technology, the IoT environment for connecting objects in the vicinity to networks and utilizing information about objects in various fields is getting attention, and security threats are also increasing. In order to solve the increasing security problem in IoT environment, we are studying methods that use certificate, encryption, hash calculation and block chain in the private sector. However, the security authentication method which overcomes the performance gap between devices and has compatibility with various devices It has not been proposed yet. In this paper, we propose an authentication method that can achieve wide compatibility by minimizing the influence of IoT device environment.

• International Journal of Internet, Broadcasting and Communication
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• v.14 no.1
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• pp.122-128
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• 2022

Minimization of human casualties in disaster situations is of paramount importance. In particular, if a marine disaster occurs, it can be directly connected to human casualties, so prompt action is needed. In the event of a marine disaster, the route and location of movement should be identified and life tubes should be used to float on the water. This paper designs and proposes an emergency IoT notification system that can quickly rescue drowning people. The maritime emergency IoT notification system consists of four main types. First, an emergency IoT device that detects the expansion of the life tube and delivers location and situation information to the emergency IoT notification server. Second, an emergency IoT web server that manages emergency information and provides notification. Third, a database server that stores and manages emergency IoT notification information. And finally, an emergency notification app that can receive and respond to emergency notification information. The emergency IoT device consists of a TPMS(Tube Pressure Monitoring System) device that checks the pressure value of the TPMS in real time and sends it to the IoT device, and an IoT device that sends the rescuer's voice information and emergency information to the emergency IoT server. Emergency information is delivered using the MQTT(Message Queuing Telemetry Transport) protocol, and voice information is delivered to the IoT server as HTTP FormData.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.6
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• pp.33-39
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• 2017

Today, residential facilities is planned and built based on modular architecture. In the modular housing, sizes and locations of spaces like rooms, kinchin, and bathrooms can be changed from-time-to-time. Therefore, current home automation systems based on predesigned and fixed system with wired sensors can not be suitable for the modular housing. As a result, a new concept-based homw automation system is required which is able to adopt varying home environment. Since the change of spaces will change the number of and types of necessary sensors, the home automation system enables to detect automatically and naturally the added or removed different types of wireless sensors and provides home automation services. In this paper, a home automation system is studied and implemented which can adopt varying space environment by detecting automatically added or removed sensors and provide new user interfaces for displaying sensing information.

• Journal of the Semiconductor & Display Technology
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• v.18 no.3
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• pp.122-126
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• 2019

These-days technology related to IoT (Internet of Thing) is widely used and there are many types of smart system based IoT like smart health, smart building and so on. In smart health system, it is possible to check someone's health by analyzing data from wearable IoT device like smart watch. Smart building system aims to collect data from sensor such as humidity, temperature, human counter like that and control the building for energy efficiency, security, safety and so forth. Furthermore, smart city system can comprise several smart systems like smart building, smart health, smart mobility, smart energy and etc. In this paper, we propose multimedia IoT based intelligent emergency alarm system for smart city. In existing IoT based smart system, it communicates lightweight data like text data. In the past, due to network's limitations lightweight IoT protocol was proposed for communicating data between things but now network technology develops, problem which is to communicate heavy data is solving. The proposed system obtains video from IP cameras/CCTVs, analyses the video by exploiting AI algorithm for detecting emergencies and prevents them which cause damage or death. If emergency is detected, the proposed system sends warning message that emergency may occur to people or agencies. We built prototype of the intelligent emergency alarm system based on MQTT and assured that the system detected dangerous situation and sent alarm messages. From the test results, it is expected that the system can prevent damages of people, nature and save human life from emergency.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.6
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• pp.1309-1317
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• 2018

Although the IoT market is steadily growing, there is still a lack of consideration for increasing security threats in the IoT environment. In particular, it is difficult to apply existing IP security technology to resource-constrained devices. Therefore, there is a demand for reliable end-to-end communication security measures to cope with security threats such as information tampering and leakage that may occur during communication between heterogeneous networks do. In this paper, we propose an end-to-end message security protocol based on lightweight cipher that increases security and lowers security overhead in resource-constrained IoT device communication. Through simulation of processing time, we verified that the proposed protocol has better performance than the existing AES-based protocol.

• International journal of advanced smart convergence
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• v.7 no.4
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• pp.50-56
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• 2018

The Internet of Things (IoT) and Visible Light Communication (VLC) is opening up new services in lighting industry by integrating sensory network features in addition to standard illumination functionality. In this progressive developments, the next generation lighting devices for smart homes are capable to sense the environmental conditions and transfer the captured data through lights to gateway controller to access remotely. The smart home environmental sensor information's are few kbps only so VLC systems need to built-in with low rate light connectivity to transfer data to the gateway. To provide error free communication, the quality of a received light signal is important to be considered when designing an VLC receiver. Therefore, this paper proposes the design of robust low rate IoL receiver design using NCP302 voltage detector for micro controller to adapt the IoT/IoL front end module for system integration. To evaluate the proposed system performance, the Arduino UNO based IoT/IoL controller designed with lighting, sensors and lights connectivity interfaces. The experimental result shows that the robust interference rejection is feasible on proposed VOL receiver and possible to have an error-free communication up to 10 kbps at a low SNR using OOK modulation.