• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.21 no.10
• /
• pp.1154-1160
• /
• 2010

In this paper, a novel printed meander monopole antenna is proposed for wireless USB dongle applications. Dual-wideband resonance is obtained by utilizing a printed meander monopole radiator. The proposed antenna was fabricated on a thin FR-4 substrate with a thickness of 1 mm and a dielectric constant of 4.6. The antenna is fed by a $50{\Omega}$ coaxial cable. This novel USB dongle antenna measures only $10{\times}50mm^2$. The measured results demonstrates that the antenna supports WiBro, Bluetooth/ISM, WLAN, S-DMB, and WiMAX service bands.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.16 no.4
• /
• pp.692-700
• /
• 2012

The WiMedia Alliance has specified a Distributed Medium Access Control (D-MAC) protocol based on UWB for high speed wireless home networks and Wireless USB. In this paper, firstly, the fair SoQ-based Distributed Reservation Protocol (DRP) for D-MAC is analyzed. And a novel SoQ-based relay transmission protocol is proposed to overcome DRP conflicts fast. In the proposed protocol, each device executes the Satisfaction of QoS (SoQ) time slot allocation algorithm independently. And, in order to give the loser device due to DRP conflicts another chance to maintain QoS resources, the proposed relay transmission protocol helps the device reserve another indirect link maintaining the required QoS resources via a relay node.

• Journal of Korea Multimedia Society
• /
• v.15 no.3
• /
• pp.345-355
• /
• 2012

The WiMedia Alliance has specified a Distributed Medium Access Control (D-MAC)/WUSB protocol based on UWB for high speed wireless home networks and WPANs. In this paper, we propose a novel SoQ-based cooperative communication protocol adaptive to current UWB link transmission rate and QoS measure. The proposed SoQ-based cooperative communication protocol has compatibility with current WiMedia D-MAC/Wireless USB standard and is executed at each device according to a SoQ-based Relay Node Selection (RNS) criterion.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.39C no.8
• /
• pp.696-707
• /
• 2014

In this paper, firstly, performance degradation due to the Private Distributed Reservation Protocol (DRP) conflict problem caused by devices' mobility is analyzed. And a novel relay transmission protocol combined with Private DRP conflict resolution is proposed to overcome the performance degradation at Private DRP conflicts. In order to give the loser device due to Private DRP conflicts another chance to maintain resources, the proposed relay transmission protocol executed at each device helps the loser device reserve another indirect link maintaining the required resources via a relay node.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2008.10a
• /
• pp.791-794
• /
• 2008

최근 홈오토메이션 시스템(Home Automation System) 즉, 가정 자동화 시스템에 대한 관심과 수요가 커지면서 이를 위한 네트워크 구축에 관한 여러 연구 및 개발이 활발히 이루어지고 있다. 홈오토메이션 시스템이란 가정에서 사용되는 여러 가전기기 및 센서장비를 이용하여 집 안의 기기를 제어함으로써 가정을 안전하게 관리하고, 사용자의 편의를 극대화하여 인간의 생활수준을 향상시키는 기술을 말한다. 본 논문에서는 Cypress사의 PSoC 기반으로 가정 내에서 사용할 수 있는 온도, 습도, 가스검출, 불꽃감지와 같은 여러 환경 센서 및 인체감지센서를 이용한 방범 센서 장치 구현방법을 제안하고, PSoC 기반의 WirelessUSB를 이용하여 센서 및 호스트 PC와의 네트워크 시스템을 구축한다.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.47 no.11
• /
• pp.91-96
• /
• 2010

In this paper, an internal USB dongle antenna with a circular hook-shaped patch is proposed. The proposed antenna comprises of a circular hook-shaped patch and a monopole stub. The proposed antenna with the dimension of $10mm{\times}50mm{\times}0.8mm$ was fabricated on commercial FR-4 substrate with a dielectric constant of 4.6 and tangent loss of 0.025. The designed antenna exhibits three different resonant bandwidths, 2.4 GHz-2.5 GHz, 3.4 GHz-3.6 GHz, and 5.15 GHz-5.825 GHz. The measured radiation patterns are omni-directional at measured frequencies. Therefore, the proposed antenna is suitable for wireless USB dongle antenna that can support multiband wireless services such as WLAN, WiMAX and Bluetooth.

• Electronics and Telecommunications Trends
• /
• v.21 no.5 s.101
• /
• pp.11-20
• /
• 2006

USB는 사용의 편리성, 넓은 확장성을 기반으로 PC 역사상 가장 성공적인 접속 장치로서, 현재까지 20억 개 이상이 사용되고 있고, USB가 장착된 장치의 종류 및 사용 개수도 빠르게 증가하는 추세이다. 이와 같은 USB의 발전에 힘입어 유선의 속도와 보안성에 무선의 편리함을 추가한 무선 USB 1.0 규격이 2005년 5월 발표되었으며, 상용 제품도 속속 출시되고 있다. 본 고는 유선 USB 2.0 기술에 기반하고 무선 매체로서UWB를 이용하는 무선 USB의 기술 및 표준화 동향에 대하여 소개하고, 무선 USB 기술의 특징 및 국내외 연구 동향에 대하여 살펴보고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2012.10a
• /
• pp.629-631
• /
• 2012

Android system has difficulty to expand the network as OS-based mobile systems fixed network hardware. Can be seen as essential to use this smart TV OS with Android OS for wireless network expansion. In this study, about the expansion of the limited hardware support for mobile Android OS WIFI module and USB-based external network devices, such as network research.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.15 no.6
• /
• pp.1271-1276
• /
• 2011

Recently, the emergence of various terminal devices increases desire for information exchanges. USB technology is the one of useful devices which is used for connection between them. Especially, it has been introduced some technologies that are able to convergence between UWB wireless technologies and USB transmission technologies. In this paper, we designed and implemented the way to extension virtually desktop computing environment by using USB transfer technology. It leads virtual desktop environment that was able to extend up to 8 units by using USB to VGA/HDMI adapter. And we can control quality of services and signal by USB transfer software.

• Journal of information and communication convergence engineering
• /
• v.12 no.1
• /
• pp.14-18
• /
• 2014

A recent major development in computer technology is the advent of wearable computer systems. Wearable computer systems employ a wireless universal serial bus (WUSB), which refers to a combination of USB with the WiMedia wireless technical specifications. In this study, we focus on an integrated system of WUSB over wireless body area networks (WBANs) for wireless wearable computer systems. However, current WBAN MACs do not have well-defined quality of service (QoS) mapping and resource allocation mechanisms to support multimedia streams with the requested QoS parameters. To solve this problem, we propose a novel QoS-aware time slot allocation method. The proposed method provides fair and adaptive QoS provisioning to isochronous streams according to current traffic loads and their requested QoS parameters by executing a QoS satisfaction algorithm at the WUSB/WBAN host. The simulation results show that the proposed method improves the efficiency of time slot utilization while maximizing QoS provisioning.