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Study of the Wireless Ad-hoc Networks with Robust Route Maintenance Scheme
Hong, Geun-Bin(홍근빈),Yun, Ji-Hun(윤지훈),Kim, Kwan-Woong(김관웅) 한국정보전자통신기술학회 2010 한국정보전자통신기술학회논문지 Vol.3 No.2
This paper has proposedfor wireless Ad-hoc networks with robust route maintenance schemes. The device feature Bluetooth and/or IEEE 802.11 network interfaces and communicate in a decentralized manner. The nodes have the responsibility of self-organizing so that the network is robust to the variations in network topology due to node mobility as well as the fluctuations of the signal quality in the wireless environment.
원격 디밍제어 기반 LED 가시광통신 시스템의 수신 특성 분석
홍근빈(Hong, Geun-Bin),장태수(Jang, Tae-Su),김용갑(Kim, Yong-Kab) 한국정보전자통신기술학회 2011 한국정보전자통신기술학회논문지 Vol.4 No.3
본 논문에서는 고휘도, 신뢰성, 저 전력 소비, 긴 수명의 장점을 가진 조명으로 사용되는 LED를 이용한 실내 조명제어 가시광통신 시스템을 구현하기 위한 연구를 수행하였으며, 현재 가속화 되고 있는 유비쿼터스 등의 다양한 응용분야의 적용 가능성을 확인하고자 한다. 이러한 시스템을 구현하기 위해 컴퓨터 프로그래밍 언어를 사용하여 Date 신호를 전송하는 가시광 통신 송 수신기를 설계하여 통신 성능 실험을 하였다. 이번 연구 결과 원활한 Date의 송 수신이 이루어지는 실내 조명제어 가시광통신 구현이 가능함을 확인하였다. This study to implement properties such as high brightness, reliability, lower power consumption and long lifetime indoor illumination control visible light communication system that with LED used by illuminations. It has probability presently to apply many application field like ubiquitous. To implement such a system, it designs Date to transmit signals to visible light communication transmitter/receiver analyzes the communication performance using computer programming language. This research result Confirmed that it is possible to implement indoor illumination control visible light communication transmitter/receiver consisting of smooth date.
LED 조명통신용 드라이빙기술 기반 VLC 송수신기 모듈의 외란광 분석에 관한 연구
홍근빈(Geun-Bin Hong),장태수(Tae-Su Jang),김태형(Tae-Hyung Kim),김용갑(Yong-Kab Kim) 대한전기학회 2011 전기학회논문지 Vol.60 No.7
In this paper, would implement a transceiver for the visible light communication that based on wireless communication driving technology for LED illumination-based infrared ray communication, and measurement analyzed a design error rate of a transceiver variable rate has made about distance change -2.5m. The error rate measured a voltage variable along illuminate change between switchable circumstances, which has illuminated insight and outright. Each analyzed and measurement on the communication distance errors along the differences of disturbance light between night and days. The LED module has implemented for number of 6 through illumination dimming in case of different values. Also, implementation for the system module of a VLC transceiver based on the infrared sensors which used feedback outcome value has analyzed with error rate.
ATmega16 마이크로컨트롤러를 이용한 전력선통신용 가시광 무선통신 시스템 구현 및 수신 특성 분석
윤지훈(Ji-Hun Yun),홍근빈(Geun-Bin Hong),김용갑(Yong-Kab Kim) 대한전기학회 2010 전기학회논문지 Vol.59 No.11
This study is to solve problems of depletion of RF bandwidth frequency, confusion possibility, security that current wireless communications system have and is to confirm possibility of applying next generation network. To solve problems of current wireless communications system, visible light communications system for power line communications using ATmega16 Microcontroller is was realized and receiver property was analyzed. PLC exclusive chip APLC-485MA, Microcontroller ATmega16, 5pi bulb type LED and high flux LED, visible light receiving sensor LLS08-A1 were used for transmitter and receiver. Performance was analyzed by designed program and an oscilloscope. It was showed average 20% improved receiver rate rather than bulb type LED in the case of high flux LED through voltage change rate on communication distance and LED type of distance between 10 to 50 cm. The blue LED showed the best performance among measured LED types with above 10% of voltage decreasing rate. But As it gradually becomes more distant, the precise date was difficult to obtain due to weak light. To overcome these sort of problems, specific values such as changing conditions and efficiency value relevant to light emitting parts and visible light receiving sensor should be calculated and continuous study and improvements should also be accomplished for the better communications condition.