• Journal of the Korea Society of Computer and Information
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• v.25 no.5
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• pp.127-135
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• 2020

In this paper, we propose an IoT-enabled solution for tour photography services with small-size investment and resources in the travel and tourism industries, being able to impact on economic, social, and cultural values. An IoT-enabled camera is developed based on an open hardware and software platform complying with oneM2M, which can make traditional embedded systems oneM2M-compliant devices due to a middleware solution called TAS (thing adaptation software). IoT cameras deployed around photo zones in a tour site could be remotely controlled via an IoT gateway with a Web-based application on a smartphone. Users would perform a pan and tilt camera control if they want and then take and download a perfect photo picture (even though they are away from the tour site). We expect that the proposed solution will promote the deployment IoT-enabled technologies in tour and travel industries which are important parts of the tertiary sector.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.7 no.4
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• pp.623-630
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• 2017

This paper surveys the state-of-the-art in korean commercial Internet of Things(IoT) services for deriving the core elements of a curriculum for major courses of IoT using RaspberryPi3. First, we survey the state-of-the-art of IoT researches and commercial services in three korean major telecommunication corporations such as Korean Telecommunications (KT), LGU+ Telecommunication (LGT), and SK Telecommunication(SKT). Second, we consider the components and advantages of the RaspberryPi3 which is popular as a representative educational tool. Concludingly, this paper derives the core elements of curriculum for major courses of IoT using RaspberryPi3 from above both processes. The corresponding elements consist of platforms, hardwares, softwares, and big-data network. Based on the important design elements of the IoT curriculum using Raspberry Pie 3, we taught embedded system course to junior students for one semester. It was successfully completed and more than 90% students were satisfied with its contents and amounts.

• Journal of Internet of Things and Convergence
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• v.6 no.3
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• pp.39-44
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• 2020

In this paper, we propose a SDN-based fog computing service mobility support scheme. Fog computing architecture has been attracted because it enables task offloading services to IoT(Internet of Things) devices which has limited computing and power resources. However, since static as well as mobile IoT devices are candidate service targets for the fog computing service, the efficient task offloading scheme considering the mobility should be required. Especially for the IoT services which need low-latency response, the new connection and task offloading delay with the new fog computing node after handover can occur QoS(Quality of Service) degradation. Therefore, this paper proposes an efficient service mobility support scheme which considers both task migration and flow rule pre-installations. Task migration allows for the service connectivity when the fog computing node needs to be changed. In addition, the flow rule pre-installations into the forwarding nodes along the path after handover enables to reduce the connection delay and service interruption time.

• Journal of Service Research and Studies
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• v.2 no.2
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• pp.91-98
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• 2012

The emergence of new types of embedded computing devices and developments in wireless networking are broadening the domain of computing from the work place and home office to other facets of everyday life. This trend is expected to lead to a proliferation of Internet of Things (IoT) environments, in which inexpensive and interconnected computing devices are capable of supporting users in a range of tasks. Context-aware computing is a key source to develop such smart services. However, there are many challenges to enable services to be smart; Heterogeneous Computing Environments, Resource Limitations, Large Amount of Data Produced, and Different Requirements for Context Interpretation. Because of these challenges, there are difficulties in providing smart service by utilizing IoT devices. Currently, many researchers are conducting researches on mobile-computing based smart service development and provisioning and network infrastructure for interconnected IoT devices. Still, there are some limitations on developing core technologies for IoT computing based smart service development. In order to remedy this situation, this thesis presents a reusable framework that provides unique and noble features which are required in developing advanced context-aware IoT applications.

• Journal of the Korea Society of Computer and Information
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• v.27 no.12
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• pp.231-238
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• 2022

In this paper, among short-range wireless communication technologies such as Beacon, Bluetooth, UWB (Ultra-wideband), ZigBee, NFC (Near Field Communication), Z-Wave, 6LoWPAN (IPv6 over Low power WPAN), D2D (Device to Device), etc., proposed an IoT service platform based on a beacon that can provide indoor positioning. And, a beacon-linked web server was designed by blocking indiscriminate beacon spam signals and applying REST web service technology with flexibility and scalability. Data accessibility between different devices was verified by testing the success rate of data transmission, the success rate of blocking beacon push, the success rate of IoT interlocking processing, the accuracy of location positioning, and the success rate of REST web service-based data processing. Through the designed IoT service platform, various proposals and research on short-distance-based business models and service platforms will be conducted in the future.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2021.06a
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• pp.168-169
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• 2021

최근 미디어 기반 분석 기술의 활성화에 따라 국제 표준 기구인 ISO/IEC는 미디어 관련 분석 및 제어 기술에 대한 표준화를 진행하고 있다. ISO/IEC SC29 WG7은 Internet of Media Thing (IoMT) 이라는 기술명으로 Internet of Thing (IoT) 기술을 이용하여 미디어 기반 분석 서비스의 제공을 위한 인터페이스 기술에 대한 표준화를 진행 중이며, 이는 IoMT를 통한 미디어 취득 기기 및 센서 기기, 미디어 분석 기기, 미디어 저장 및 표현 기기에 대한 인터페이스를 정의하고 있다. 기본적으로 이 표준은 IoT 기법을 기반으로 하고 있는 데, IoT 기법은 서비스 제공자 - 소비자의 peer to peer 서비스 관리 기법으로 다양한 기기간 연동을 제공하는 미디어 기기간의 서비스 구성의 적용을 위해서는 연계에 대한 고려가 추가로 필요하다. 본 논문에서는 상기와 같은 IoMT 기반의 미디어 서비스 구성에 있어 IoMT 기기간 연계를 보다 손쉽게 설정하고 구성할 수 있는 서비스 연동 기법에 대한 요구사항을 검토하고 해결 방안을 검토한다. 단일 기기에 대한 제어와 달리 다양한 기기간의 밀접한 연계를 통한 미디어 서비스에 대하여, 본 논문은 각 기기간 연결을 autonomous하게 수행할 수 있는 별도의 IoMT 기기를 제시하여 해당 기기간 연계 기법을 제시한다. 이 과정에서 별도의 IoMT 기기가 제공해야 할 요구사항 및 주요 기능에 대한 척도를 함께 제시한다.

• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.3
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• pp.419-424
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• 2015

The era of IoT in which all objects are intelligent and are connected to the Internet has been started. In order to establish and activate an IoT eco system, open services platform is very important. In this paper, we developed a BLE sensor module as a component of the open service platform based on the IoT and the open source hardware Blutooth4.0. To verify the functionality and performance of the developed BLE sensor module was built to evaluate the performance of the test environment.

• KNOM Review
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• v.23 no.1
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• pp.51-62
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• 2020

Open IoT platform that shares communication infrastructure and provides cloud resources can flexibly reduce development period and cost of smart service. In this paper, as an open IoT platform, we propose a virtual IoT system based on edge computing that implements a virtual IoT device for a physical IoT device and allows service developers to interact with the virtual device. A management server in the edge cloud, near the IoT physical device, manages the creation, movement, and removal of virtual IoT devices corresponding to the physical IoT devices. This paper define the operations of the management server, the physical IoT device, and the virtual IoT device, which are major components of the virtual IoT system, and design the communication protocol required to perform the operations. Finally, through simulations, this paper evaluate the performance of the edge computing based virtual IoT system by confirming that each component performs the defined states and operations as designed.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.188-191
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• 2013

인간과 사물, 서비스 세 가지 분산된 환경 요소에 대해 인간의 명시적 개입 없이 상호 협력적으로 센싱, 네트워킹, 정보 처리 등 지능적 관계를 형성하는 사물 공간 연결망인 IoT(Internet of Things)에서 센싱된 정보를 처리하고 서비스하기 위한 환경을 적시적소에 배치(Depolyment) 하기 위하여 클라우드 서비스와의 연동방법에 대해 본 논문에서 연구하였다. Public Cloud환경에서 Hadoop Cluster를 구성하여 IoT 서비스에 적용할 수 있는 통합 환경을 구축하면 폭발적으로 증가하는 IoT 데이터를 저장하고 빠른 시간안에 이를 효과적으로 처리 및 분석하기 위한 시스템 구축이 가능하며 분산 저장소에 저장된 데이터를 분석하고 의미있는 지식을 발견하여 새로운 비즈니스 모델 창출에 기여할 수 있다. 본 논문에서 Public Cloud 환경에서 Hadoop Clouster를 구성하여 IoT에서 생성되는 데이터를 효과적으로 처리하고 분석할 수 있는 방법을 제안한다.

• Journal of KIISE
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• v.43 no.8
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• pp.893-901
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• 2016

In Internet of Things (IoT) environments, users are required to search for IoT devices necessary to access services for accomplishing their tasks. As IoT technologies advance, a user task will utilize various types of IoT-based services that are deployed in an IoT environment. Therefore, to accomplish a user task effectively, the services that utilize IoT devices need to be found in a certain geographical region. In addition, the service discovery needs to be accomplished in a stable manner while considering dynamically changing IoT environments. To deal with these issues, we propose two service discovery methods that consider geographic cohesiveness of services in IoT environments. We compare the effectiveness of the proposed methods against a traditional service discovery algorithm that does not consider geographic cohesiveness.