• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.1
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• pp.209-218
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• 2017

Healthcare services can be provided through a number of independent service platforms for measurement of vital signs, diagnosis and prevention of diseases, and Information and communication technology(ICT) such as internet and mobile are converged to provide health information to users at anytime and anywhere, and it is in the center of the IoT(Internet of things). Accordingly, in this paper, we designed IoT based urination management system and evaluate the performance. A low - power Zigbee network was constructed for the configuration of the urination management system. The implemented capacitive diaper sensor was operable for the duration of 2,000 hours. We also built a database server using Raspberry Pi, a tiny embedded device, and stored the collected data to verify the data through an Android-based mobile application. The proposed urination management system can be utilized not only for the older patients, but also for the infants.

• Journal of IKEEE
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• v.24 no.2
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• pp.468-474
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• 2020

This paper describes the hardware implementation of SPECK, a lightweight block cipher algorithm developed for the security of applications with limited resources such as IoT and wireless sensor networks. The block cipher SPECK crypto-core supports 8 block/key sizes, and the internal data-path was designed with 16-bit for small gate counts. The final round key to be used for decryption is pre-generated through the key initialization process and stored with the initial key, enabling the encryption/decryption for consecutive blocks. It was also designed to process round operations and key scheduling independently to increase throughput. The hardware operation of the SPECK crypto-core was validated through FPGA verification, and it was implemented with 1,503 slices on the Virtex-5 FPGA device, and the maximum operating frequency was estimated to be 98 MHz. When it was synthesized with a 180 nm process, the maximum operating frequency was estimated to be 163 MHz, and the estimated throughput was in the range of 154 ~ 238 Mbps depending on the block/key sizes.

• The Journal of the Convergence on Culture Technology
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• v.3 no.2
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• pp.43-48
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• 2017

5G will bring revolutionary development in mobile communication, and it is anticipated to have complete commercialization including mass adoption rate by 2020s. High number of smart devices including IoT, wearable devices, etc., which have high amount of data usage, will involve even higher data traffics. In addition, media dependency and demand is rapidly rising. These environmental aspects will necessity and sufficient condition for successful implementation of 5G mobile communication system. In this paper, global cooperation and competition for 5G technology leadership will be analyzed and summarized. Through this, proper solution to maintain competency of Korea in future will be proposed.

• Journal of Digital Convergence
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• v.13 no.4
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• pp.51-59
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• 2015

In this study, we derived key factors required for the activation of the domestic e-book market and evaluated its importance. Specifically, we derived key evaluation items of C-P-N-D ecosystem perspective through literature review. In addition, we analyzed the implications by evaluating the importance depending on AHP after derived items were modified and classified together with the publisher working group. As the results of analysis, experts considered price(0.785), quality(0.149) and service(0.066) as the important items among three items derived as the primary upper class. A total of 23 factors were derived as the secondary lower class. The importance depending on C-P-N-D areas is as follows: contents(0.43), platform(0.35), device(0.11) and network(0.05). Among the entire sub-factors, three items such as 'distribution of profits with platform', 'profitability of product costs of contents' and 'appropriate rental price of contents and streaming service' showed significantly higher importance than that of other 20 items.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2015.07a
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• pp.509-512
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• 2015

국내 자영업자의 수는 매년 증가하고 있으나 판로나 홍보 부족으로 인해 폐업하는 자영업자의 수가 급격하게 증가하고 있다. 대형 FC는 별도의 마케팅을 지원하는 조직을 보유하고 있어 홍보나 판촉에 용이하지만 개인 소상공인들은 주로 전통적인 광고수단인 전단이나 판촉물을 통해 홍보함에 따라 수익 창출에 어려움이 있다. 최근 고속 네트워크 발전과 다양한 고성능 스마트 단말의 보급으로 홍보할 수 있는 매체와 채널이 다양화되고 있다. 그러나 소상공인들은 이러한 환경을 적극적으로 이용할 수 없는 상황이다. 따라서 IT 활용 능력을 통해 소상공인이 손쉽게 이용하기 위한 경쟁력 있는 다차원 홍보물을 활용한 소상공인 점포지원 서비스가 필요하다. 본 연구 과제에서는 다차원 홍보물을 활용한 소상공인 점포지원 서비스 시스템 및 UI 개발을 수행한다. 이를 통해 고객의 점포 재방문율을 향상시켜 소상공인들의 이익 창출을 증대할 수 있다. 본 연구에서는 다차원 홍보물을 활용한 소상공인 점포지원 서비스 시스템 및 UI 개발을 위해 소상공인 점포들이 이용 가능한 서비스 시나리오 개발, 고객 정보 관리 기능 개발, 다양한 형태의 메시지 전송 기술 개발과 시험 테스트를 수행한다. 본 용역 과제는 (1) 다차원 홍보물을 활용하여 고객 재방문율을 향상하는 서비스 시나리오 개발, (2) 고객 정보 관리 기능 개발, (3) SMS, MMS, 애플리케이션 등을 이용한 다양한 형태의 메시지 전송 기술 개발, (4) 고객 정보 관리와 다차원 홍보물 전송이 수행 가능한 형태의 UI 개발, (5) 소상공인 점포지원 서비스 시스템 프로토타입 개발 부분으로 구분하여 진행되었다.

• Journal of Advanced Navigation Technology
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• v.22 no.5
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• pp.472-477
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• 2018

In this paper, we develop interactive content services for preventing depression of users through an intelligent Internet of Things(IoT) mirror system. For interactive content services, an IoT mirror device measures attention and meditation data from an EEG headset device and also measures facial expression data such as "sad", "angery", "disgust", "neutral", " happy", and "surprise" classified by a multi-layer perceptron algorithm through an webcam. Then, it sends the measured data to an oneM2M-compliant IoT server. Based on the collected data in the IoT server, a machine learning model is built to classify three levels of depression (RED, YELLOW, and GREEN) given by a proposed merge labeling method. It was verified that the k-nearest neighbor (k-NN) model could achieve about 93% of accuracy by experimental results. In addition, according to the classified level, a social network service agent sent a corresponding alert message to the family, friends and social workers. Thus, we were able to provide an interactive content service between users and caregivers.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.8
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• pp.1494-1502
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• 2016

With the increasing availability of medical sensors and Internet of Things(IoT) devices for personal use, considering the interaction with users, it is planned to add intelligent function design to the fashionable jewelry, and develop composite multi-function intelligent jewelry through sensors identification. By means of IoT technology, while possessing communication function of intelligent jewelry, the function of intelligent jewelry can be expanded to the linkage network. In order to rapidly manage the mass data produced by intelligent jewelry sensors based on IoT, an intelligent jewelry system for health management is designed and an ontology model of intelligent jewelry system based on IoT is worked out. After the state of the services through the smart phone application is shown. The application provides a personalized service to the user and to determine the risk to show the guide lines according to the disease.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.10a
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• pp.453-456
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• 2007

In this paper, we describes a design of Wireless Mesh Network based middleware that applied into USN(Ubiquitous Sensor Networks). WMN based middleware is a technique which links data between widely distributed sensor devices and WMN for context-awareness. The use of WMN base middleware in this paper makes possible communication on insufficiently network constructed area by use of WMN. WMN based middleware also anaylze events comprehensively that originated from specific sensor device. Based on the result from analyzed data with predetermined value WMN based middleware will given an order to designated actuator devices. Middleware operate each function of sensor network management and application service separately.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.12B
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• pp.831-837
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• 2005

Personal general purpose computer(PC) has been evolved from desktop to portable mobile device such as tablet PC and PDA. Technology innovation on semiconductor have made it possible to package a reasonably Powerful Processor and memory subsystem with advanced input/output devices. At last these subsystems are miniaturized into wearable system. Wearable computer has recently gained attention as the post PC in the ubiquitous environment. Wearable computing becomes more and more feasible and receives growing attention throughout industry and the consumer marketplaces. This paper proposed and developed WPS that has multimedia features and network features as a wearable embedded platform. We explain the form, overall architecture, functions and user applications of this WPS. This paper also discusses the form of next generation computer platform with intuitive user interfaces and well designed applications in the future.

• The KIPS Transactions:PartC
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• v.10C no.1
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• pp.71-76
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• 2003

Internet traffic is getting tremendously heavier due to the exponential growth of the Internet users, the spread of the E-commerce and the network games. High-speed routers for fast packet forwarding are commercially available to satisfy the growing bandwidth. A high-speed router, which has the decentralized multiprocessing architecture for IP and routing functions, consists of host processors, line interfaces and switch fabrics. In this paper, we propose a software architecture tuned for high-speed non-forwarding packet manipulation. IPCMP (Inter-Processor Communication Message Protocol), which is a mechanism for IPC (Inter-Processor Communication), is also proposed and implemented as well. Proposed IPC mechanism results in faster packet-processing rate by 10% as compared to the conventional IPC mechanism using UDP/IP.