• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권8호
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• pp.4227-4240
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• 2019

In this paper, we present our proposed magnetic induction based wireless communication system. The proposed system is designed to perform communication as well as distance measurement in underground environments. In order to improve the communication quality, we propose and implement the adaptive channel compensation technique. Based on the fact that the channel may be fast time-varying, we keep track of the channel status each time the data is received and accordingly compensate the channel coefficient for any change in the channel status. By using the proposed compensation technique, the developed platform can reliably communicate over distances of 10m while the packet error rate is being maintained under 5%. We also implement the distance measurement block that is useful for various applications that should promptly estimate the location of nearby nodes in communication. The distance between two nodes in communication is estimated by generating a table describing pairs of the magnetic signal strength and the corresponding distance. The experiment result shows that the platform can estimate the distance of a node located within 10m range with the measurement error less than 50cm.

• 디지털산업정보학회논문지
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• 제14권4호
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• pp.87-92
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• 2018

One of the problems with the base station equipment is that there is a large difference between the replacement time of the hardware equipment such as the base station equipment and the radio access equipment, and the evolution period of the communication standard. Therefore, the base station communication platform must be flexible enough to handle the evolving communication standards after purchase. Recent research on reconfigurable communications platforms has focused on the efficient architecture of the communications platform to meet these requirements through software downloads while still using existing hardware. This paper presents a prototype of a base station communications platform based on the ETSI standard reconfigurable architecture. The communication platform presented in this paper is implemented as an ETSI standard reconfigurable architecture using a general-purpose DSP (Digital Signal Processor). In the implemented prototype, we verify the real-time feasibility of communication protocol updates through software reconfiguration.

• 한국치위생학회지
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• 제21권3호
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• pp.211-225
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• 2021

Objectives: To validate the role of a new information and communication technology platform that we created for the betterment of the oral health of persons with disabilities and for providing appropriate health care services. Methods: A Delphi survey was conducted among 16 people in various professions, including academia, government agencies, and dentistry, to evaluate the validity of the information and communication technology platform. Moreover, platform satisfaction was evaluated using a user experience questionnaire among 200 people, including persons with disabilities, parents, and public institutions. Results: Experts in consensus indicated a high validity for the categories of service provider (CV=0.29, CVR=0.69), service target (CV=0.29, CVR=0.38), service contests (CV=0.27, CVR=0.63), and financial support (CV=0.30, CVR=0.63) in our information and communication technology platform. In addition, information from questionnaires on user experience and communication technology satisfaction analysis showed that both users and providers were highly satisfied with the platform. Conclusions: The provision of oral health services based on the new information and communication technology platform has numerous advantages, in addition to providing adequate oral health care for the disabled. Furthermore, the social safety net for improved oral health may be further strengthened.

• Journal of information and communication convergence engineering
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• 제21권3호
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• pp.239-243
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• 2023

Owing to the environment in which it has become difficult to face people, on-tact communication has been activated, and online video conferencing platforms have become indispensable collaboration tools. Although costs have dropped and productivity has improved, communication remains poor. Recently, various companies, including existing online videoconferencing companies, have attempted to solve communication problems by establishing a videoconferencing platform within the virtual reality (Virtual Reality) space. Although the VR videoconference platform has only improved upon the benefits of existing video conferences, the problem of manually summarizing minutes because there is no function to summarize minute documents still remains. Therefore, this study proposes a method for establishing a meeting minute summary system without applying cases to a VR videoconference platform. This study aims to solve the problem of communication difficulties by combining VR, a metaverse technology, with an existing online video conferencing platform.

• 한국항행학회논문지
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• 제24권6호
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• pp.521-526
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• 2020

본 논문은 상용차의 자율 군집주행 플랫폼을 평가함에 있어 차량 환경용 C-ITS 통신프로토콜인 WAVE 통신 및 LTE-V2X 통신과 상용 이동통신인 Legacy LTE 통신을 결합한 하이브리드 V2X 통신 플랫폼의 설계 방안을 제안하고 설계과정을 제시한다. 안전하고 효율적인 자율 군집주행 플랫폼을 위해 C-ITS 통신 기반의 저 지연 통신기능이 요구되며 또한 이를 관제하기 위해서 상시 연결이 가능한 Legacy LTE 등의 상용 통신기능이 요구된다. 이러한 시스템을 평가하기 위해서 평가 장비는 동일 수준 이상의 통신성능을 가져야 한다. 본 논문에서 제시되는 주요 설계 내용은 기능 평가를 위한 하이브리드 V2X 단말기 구현에 적용될 예정이다.

• Journal of information and communication convergence engineering
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• 제6권4호
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• pp.376-382
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• 2008

Developing highly cost-efficient and reliable embedded systems demands hardware/software co-design and co-simulation due to fast TTM and verification issues. So, it is essential that Platform-Based SoC design methodology be used for enhanced reusability. This paper addresses a reusable SoC platform based on OpenCores soft processor with reconfigurable architectures for hardware/software codesign methodology. The platform includes a OpenRISC microprocessor, some basic peripherals and WISHBONE bus and it uses the set of development environment including compiler, assembler, and debugger. The platform is very flexible due to easy configuration through a system configuration file and is reliable because all designed SoC and IPs are verified in the various test environments. Also the platform is prototyped using the Xilinx Spartan3 FPGA development board and is implemented to a single chip using the Magnachip cell library based on $0.18{\mu}m$ 1-poly 6-metal technology.

• 한국인터넷방송통신학회논문지
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• 제17권5호
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• pp.143-150
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• 2017

본 논문에서는 스마트 폰 추적 및 색상 통신을 이용한 새로운 동작인식 플랫폼을 개발한다. 카메라가 탑재된 PC 혹은 스마트 TV와 개인 스마트 폰 가지고 영상을 기반으로 한 객체 인식 기술을 이용하여 동작 인식 유저 인터페이스를 제공한다. 사용자는 손으로 스마트 폰을 움직여 모션 컨트롤러처럼 사용할 수 있으며, 플랫폼에서는 이 스마트폰을 실시간으로 검출하고, 3차원 거리와 각도를 추정하여 사용자의 동작을 인식한다. 또한, 스마트 폰과 서버의 통신을 위하여 색상 디지털 코드를 이용한 통신 시스템이 사용된다. 사용자들은 색상 통신 방법을 이용하여 텍스트 데이터를 자유자재로 주고받을 수 있으며, 동작을 취하는 도중에도 끊임없이 데이터를 전송할 수 있다. 제안한 동작인식 플랫폼 기반의 실행 가능한 콘텐츠를 구현하여 결과를 제시한다.

• 한국멀티미디어학회논문지
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• 제20권9호
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• pp.1519-1526
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• 2017

The existing DSRC(Dedicated Short Range Communication) scheme has a limitation in providing various services through short-range wireless communication. Therefore, it is necessary to develop an intelligent WAVE/DSRC hybrid wireless platform that can improve data transmission speed and extend the effective communication range. This paper introduces WAVE/DSRC integrated platform technology using WAVE(Wireless Access in Vehicle Environments) to overcome the disadvantages of DSRC. First, the desinged software configuration of the WAVE/DSRC integrated platform is described. Then each task operation scheme and WAVE software design are described. By applying the WAVE/DSRC integrated platform, we can compensate the shortcomings of DSRC. It can provide more accurate and reliable services.

• International journal of advanced smart convergence
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• 제10권4호
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• pp.172-182
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• 2021

We look at the business model development of a fan community platform 'Weverse' from two-sided platform (TSP) to multi-sided platform (MSP) and investigate its platform business model. From the Rocket Model's theoretical perspective, the results reveal that Weverse firstly focuses on inviting artists as many as possible starting from BTS, then attracts new artists' fans naturally. For success of this TSP, it forms MSP, 'Weverse Shop' to meet two sides' relevant needs timely and filtered. In third stage of connection, various partnerships are attempted in terms of open platform strategies. For instance, by combining 'VLive' and Weverse, Naver's fan platform business is transferred to Weverse. For core transaction through direct and indirect monetization, several cobranding activities are tried. Lastly, regarding optimization, newly born Weverse being launched in the first half of 2022 is supposed to create further synergies with Naver's R&D capabilities in data, AI, and other technologies like metaverse platform 'ZEPETO' which already sells clothing items of Weverse artists.

• 한국멀티미디어학회논문지
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• 제10권1호
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• pp.66-73
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• 2007

SDR(Software Defined Radio) 기술은 RF 및 IF를 신호처리를 위한 고성능 디지털 신호처리 소자를 기반으로 하드웨어 수정 없이 모듈화 되어 있는 통신 플랫폼을 이용하여 소프트웨어 변경만으로 단일의 송수신 시스템을 통해 다수의 무선 통신 규격을 통합 수용하기 위한 무선 접속 기반 기술이다. 다양한 복합 네트워크 환경 하에서 구성될 다양한 통신 시스템은 각각의 무선 네트워크들 간의 쉽고 빠른 인터페이스를 보장하기 위해 재구성 가능한 SDR개념 기반의 통신 플랫폼이 요구된다. 본 논문은 이러한 SDR 기반의 플랫폼 구현을 위해 TMS320C6713 CPU를 이용한 DSP 보드, IF 신호처리를 위한 FPGA 보드와 무선랜 대역의 RF 송수신기가 결합된 형태의 통신 플랫폼을 설계 및 제작하였다. 또한, 제작된 플랫폼을 이용하여 다양한 통신방식(BPSK, QPSK, 16QAM)을 적용함으로서, 재구성 가능한 통신 단말 플랫폼의 구현을 확인하였다.