• KSCI Review
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• v.14 no.2
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• pp.117-122
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• 2006

In this paper, we designed and implemented the DCS(Distributed Control System) terminal remote monitoring board for build total unified management system based wireless communication on automatic control system fields. Also, it tested and evaluated for check an usability and performance. The board monitored relay and fuse status at power management room real-time. Therefore, we expected economic effects extend relay life-time that pre-detected errors and prevented relay fault.

• The Journal of the Korea institute of electronic communication sciences
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• v.6 no.2
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• pp.330-336
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• 2011

RFID is the item is at the core of the Internet, promoting action in the online community is a pivotal element. RFID uses radio frequency waves to automatically find the technology to track individuals and items referring to the short-range wireless technology can be included. For example, ZigBee and Bluetooth has a strong ability to track and calculate. In this study, major advances in this technology by analyzing the techniques of intensive discussions, the current progress of mankind, and the impact on the future direction of development is included.

• The Journal of the Korea institute of electronic communication sciences
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• v.3 no.4
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• pp.228-232
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• 2008

For the past several years, many countries have passed or have recommended legislation making it illegal to use in-hand mobile phones while driving and several manufacturers have released car kit solutions enabling hands-free operation of the mobile phone. But an automobile environment can pose extremely harsh physical conditions impacting audio quality, safety, and reliability. This article introduced a Car Kits that provided a total entertainment and telematics solution, which support all current features within the constraints of low power consumption, form factor, price, ease-of-use, manufacture ability, testability and high total quality.

• Journal of information and communication convergence engineering
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• v.8 no.6
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• pp.630-634
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• 2010

In this paper, we designed and fabricated a multi-band folded monopole antenna for mobile handsets that can be used for multiple services. The proposed antenna, with a small size of $28.060{\times}12.665{\times}5.035mm^3$ can provide sufficient bandwidth to cover the GSM900 (Global System for Mobile Communications: 880-960 MHz), DCS (Digital Cellular System: 1710-1880 MHz), K-PCS (Korea-Personal Communication Service: 1750-1870 MHz), Wibro (2300-2390 MHz) and Bluetooth (2400-2483 MHz) bands.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.793-796
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• 2016

정보통신 기술의 발달로 사물인터넷에 대한 관심이 증가하였다. 사물인터넷의 한 요소인 무선 큰거리 통신 기술에는 WIFi, 블루투스, ZigBee 등이 있다. 이러한 기술들 중 저전력 블루투스는 낮은 전력 소비와 범용성 덕분에 많은 각광을 밭고 있다. BLE(Bluetooth LE)의 한 형태인 비콘은 더욱 저전력이며, 패킷을 전달하는 방식 또한 기존의 블루투스와 차이가 있다. 본 논문에서논 컨텐츠 보안이 필요한 비콘 서비스의 예시로 비콘을 통한 새로운 형태의 음악 음반을 제시하였다. 또한, 그 보안 특성에 맞춰 패킷 이중화, RSSI, Serial Number Binding 등의 기술들을 사용한 보안 방법을 설계 및 구현한 보안 사레에 대하여 서술한다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.265-267
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• 2001

블루투스는 차세대 근거리 무선통신 기술로 각광받고 있으며, 프로토콜 스택의 개발을 통한 다양한 서비스제공을 필요로 한다. 프로토콜 스택의 상위 계충과 각종 프로파일은 유일한 것이 아니고, 응용 목적에 따라 다양한 형태로 개발될 수 있으며, 이러한 프로토콜 스택에 대한 개발은 향후 지속적으로 개발될 블루투스 어플리케이션에 대한 원천기술을 확보하는 의미론 가진다. 이 논문에서는 블루투스 프로토콜 스택을 개발하기 위한 첫 단계로 블루투스 모듈과 호스트사이의 인터페이스인 HCI를 구현했고, 일련의 실험을 통해 블루투스 장치검색과 연결 설정 밋 데이터 송수신 동작들이 성공적으로 수행되는 것을 확인하였다.

• Korean Journal of Digital Imaging in Medicine
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• v.5 no.1
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• pp.130-136
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• 2002

One of current trends of medical technology is analog to digital. Moreover, The Government put a premium on PACS(Picture Archiving and Communication System) for Medical Insurance in November, 1999. Therefore many hospitals are installing(or planning to install) PACS facilities on their buildings. However most of hospitals didn't consider PACS facilities in the beginning of construction. In particular, the Networking is one of the most difficult things for PACS installation. There is no space for network equipments, and no path for network lines, etc. To solve these problems, wireless network is proposed. The wireless network is divided to three parts mainly. One is the wireless communication for Local Area Network, another is the data transmission through a satellite for Tele-Radiology, and the last one is the technology using Bluetooth for each sub-system of PACS. But there are other problems in wireless systems, i.e., network bandwidth, system stability, interference with other devices. The purpose of this paper is to suggest the future and new trend of PACS including all the problems.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.61-62
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• 2019

With development of IT technology, the ubiquitous has been realized in various industry. In construction industry, as well, end-edge techniques have been introduced such as managing technique the temperature and compressive strength of the concrete placed in structure in domestic and abroad project sites. However, several problems were found during application at the actual field regarding difficulties of connecting Bluetooth communication due to the short communication range, diffuse reflection caused by aluminum formwork, and high cost by using one-time sensor. Therefore to recover these shortages, and improve the performances, the wireless sensor network based concrete IoT management system for concrete early-age quality management was developed.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.8
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• pp.1962-1967
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• 2013

Recently our lives have become more convenient as a development of smart phones. For this reason, smart phone users have increased rapidly as well. However existing built-in functions in smart phone are not fully supported variety of currently released applications. So Appcessories that combines mobile handsets and accessories is attracting the notice of smart phone users. In this paper, we design and implement remote control Appcessories using Bluetooth communication. Also we verify a robustness of mobile terminals and system hardware and convenience of using applications by applying it to the infant car system.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.05a
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• pp.60-61
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• 2018

본 연구는 일반적으로 인간이 듣지 못하는 비가청주파수 통신에 대해 분석한다. 대표적인 무선 통신방식으로는 NFC(Near Field Communication), Bluetooth, Wi-Fi 기술 등이 있다. 하지만 이 통신방식들은 통신 모듈이 따로 필요하다는 단점이 있다. 이러한 단점을 보완하기 위해, 본 연구에서는 마이크 및 스피커가 기본적으로 탑재된 스마트폰을 기반으로 한 비가청주파수 통신을 제안한다. 더 나아가 주파수 제어 코드를 최적화하여 비가청주파수를 이용한 통신 거리를 기존의 기술보다 확장하고 높은 인식률을 가지는 것을 목표로 한다.