• Title, Summary, Keyword: Bluetooth

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A LNA for 2.4GHz Bluetooth application

  • 유정근;김정태;허창우
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.386-389
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    • 2003
  • 본 논문에서는 Bluetooth applications를 위한 Bipolar Transistor low noise amplifier (LNA)를 설계하였다. 설계된 LNA는 2.4GHz에서 14.31[dB]의 Gain과 1.59[dB]의 NF를 보였다. 또한 S11은 -13.5[dB], S22는 -21.4[dB]의 양호한 값은 보였다.

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Control of mobile robot system with wireless transmission of image information.

  • Jeong, Sang-Hoon;Kwak, Jae-Hyuk;Lim, Joon-Hong
    • 제어로봇시스템학회:학술대회논문집
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    • pp.908-911
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    • 2004
  • There are various researches on mobile robot systems. Connection method between server and client of mobile robot system is one of them. In the case of mobile robot system, when connection method between server and client is wireless than wire, applications may be expanded. Also in remote monitoring environment using mobile robot system, we are interested in an effective transmission of the image information between server and client. In this paper, Bluetooth is used for connection method between server and client. One of the major applications of Bluetooth is the cable replacement for mobile and peripheral devices. Using Bluetooth, we propose the control method of mobile robot system. Bluetooth offers fast and reliable transmissions of both voice and data over the globally available 2.4GHz ISM (Industrial, Scientific and Medical) band. It has the advantage of small size, low power and low cost. It has the disadvantage of limited range and limited bandwidth. Also in order to transfer effectively image information between remote site(server) and mobile robot system(client) using Bluetooth, we applied to MPEG-2 and MPEG-4 image compression techniques and the results are compared with each other.

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Educational Software Development of Bluetooth Protocol for Protocol Monitoring and Emulation (프로토콜 모니터링 및 에뮬레이션 기능을 제공하는 블루투스 프로토콜의 교육용 소프트웨어)

  • 정중수
    • The Journal of the Korea Contents Association
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    • v.4 no.1
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    • pp.1-7
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    • 2004
  • In addition to wired communication technology, wireless communication technology has been driving communication revolution nowadays. Bluetooth technology carries out data/voice communication making pico-net and the various application services are supported by access network connected to public network. This paper presents educational software development of bluetooth protocol stack including HCI, L2CAP, RFCOMM, SDP and profiles including GAP, SPP, GEOP, FTP. This software which supports programming environment of these protocol monitoring and emulation is implemented basically step by step for education based on H connected to the bluetooth device through RS-232-C, UART or USB cable. Application program coded by Visual C is operated over the firmware loaded on the bluetooth device connected to the PC. Additionally ftp and chatting function are developed to enhance educational efficiency.

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A Study of Transmission Time of ACL Packet in Bluetooth Wireless Link (블루투스 무선 링크에서 ACL 패킷의 전송 시간에 관한 연구)

  • Moon, Il-Young;Cho, Sung-Joon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.1
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    • pp.590-593
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    • 2005
  • In this paper, it is analyzed a transmission time of ACL Packet in bluetooth wireless link. In order for segment to improve the transfer capability in bluetooth system, it is fragmented in TCP total messages that are coming down from upper layer and then the packets are sent one at time in baseband. And it is studied that transmission time for bluetooth wireless link according to DM1, DM3 or DM5 packet type in bluetooth piconet environment. From the results, we were able to obtain ACL packet transmission time, optimal TCP packet size and DM packet size.

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Bluetooth Network for Distributed Autonomous Robotic System

  • Whang, Se-Hee;Sim, Kwee-Bo
    • 제어로봇시스템학회:학술대회논문집
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    • pp.2346-2349
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    • 2005
  • Distributed Autonomous Robotic System (DARS) is defined as a system that independent autonomous robots in the restricted environments infer their status from pre-assigned conditions and operate their jobs through the cooperation with each other. In the DARS, a robot contains sensor part to percept the situation around themselves, communication part to exchange information, and actuator part to do a work. Especially, in order to cooperate with other robots, communicating with other robots is one of the essential elements. Because Bluetooth has many advantages such as low power consumption, small size module package, and various standard protocols, Bluetooth is rated as one of the efficient communicating technologies which can apply to small-sized robot system. In this paper, we will develop Bluetooth communicating system for autonomous robots such as DARS robots. For this purpose, The Bluetooth communication system must have several features. The first, this system should be separated from other robot parts and operate spontaneously and independently. In other words, this communication system should have the ability to organize and maintain and reorganize a network scheme. The next, this system had better support any kinds of standard interfaces in order to guarantee flexible applicability to other embedded system. We will discuss how to construct and what kind of procedure to develop the network system.

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A Study on Characteristics of an Terrestrial Magnetism Sensor with Bluetooth (Bluetooth를 이용한 지자기센서의 특성에 관한 연구)

  • Park, Sun-Jin;Jeong, Jung-Su
    • Convergence Security Journal
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    • v.6 no.3
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    • pp.37-47
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    • 2006
  • In this research, We connect the terrestrial magnetism sensor of the Philips to a bluetooth communication system and measured 360 degree of the azimuth change the angle with an incline of 5 degrees to an order direction. The value of the azimuth to be measured sent to the Bluetooth communication system and analyzed the measuring value in the 100m as moved. Using the bluetooth, we could send the measuring value of the azimuth without the bearing error in the plain without an electric wave obstacle within a distance in straight line 100M. We got the value of the azimuth have 98% reliability to maintain at a level with the terrestrial magnetism sensor. Based on this research. We send the measuring value of the azimuth which the accuracy is improved to a mobile intelligent robot moving a land inclined equipped with this system and can track the azimuth of it.

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A Study on Comparison of Control Methods in Wireless Power Transfer Systems (무선전력전송시스템 제어 기술 비교 연구)

  • Jang, Dong-won;Cho, In-Kwee
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.113-116
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    • 2015
  • This paper presented about the system for controlling a wireless power transmission using bluetooth protocol. Bluetooth protocol has been applied in many fields that communicate with data and audio signal in short range. Recently, however, Bluetooth low energy(BLE) more simple than the existing protocol is standardized and is widely used in medical applications and consumer electronics that handle small amount of sensor data and transmit by the low power control signal. It has also been adopted as the standard for the control in the wireless power transfer system. In this paper, We analysed and described the bluetooth low energy protocol techniques for controlling the wireless power transfer system.

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Energy-Efficient Voice Data Broadcast Method in Wireless Personal Area Networks for IoT (IoT-WPAN 환경에서 에너지 효율적 음성 데이터 Broadcast 기법)

  • Lee, Jaeho
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.40 no.11
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    • pp.2178-2187
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    • 2015
  • Bluetooth Low Energy (Bluetooth LE) is a representative break-through communication technology for wireless personal area networks on nowaday. In this environment, most of significant performance should be aiming to energy efficiency due to the policy for manufacturing light-weighted communication devices derived from requirement of world IoT market, and many researches have been developed to satisfy this requirement. While Bluetooth LE has been leading the low power communication technology required from the current market by employing duty cycle and frequency hopping approaches, it couldn't address the problem of reliability on broadcast transmissions. The main goal of this paper is aiming to addressing this problem by suggesting a new method. Furthermore analytic evaluations would also be proceeded to find objective results in the view point of broadcast transmission efficiency from Master device.

Development of a Bluetooth Access Point on Embedded System for One - Phone Service (임베디드 시스템에서 원-폰 서비스를 위한 블루투스 액세스 포인트 개발)

  • Min Byungjo;Hwang June;Park Jongkyu;Kim Hagbae
    • The KIPS Transactions:PartA
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    • v.11A no.6
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    • pp.433-438
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    • 2004
  • In this paper, we describes the development of Bluetooth network Access Point(AP) for the access network connection of Bluetooth devices at home. Unlike headset, mouse, and keyboard, the AP should have capability to support multiple connection and stabilized network throughput. Our AP allows various kinds of Bluetooth terminals to access the access network like xDSL and PSTN(Public Swithced Telephone Network) stably. Especially, users can access the PSTN at home instead of expensive CDMA network through the AP by using the one-phone which is the cellular phone with the Bluetooth module.

Implementation of Bluetooth-based Mobile Open Market System (Bluetooth 기반 모바일 오픈 마켓 시스템 구현)

  • You, Hee-Hoon;Joung, Young-Woo;Lim, Yu-Jin;Park, Joon-Sang
    • The KIPS Transactions:PartC
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    • v.17C no.2
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    • pp.215-222
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    • 2010
  • IEEE 802.15 WPAN(Wireless personal area network) technologies represented by Bluetooth are prevalent these days. However, they have short radio coverage and thus cannot be used to build a SNS for servicing users spread over a wide area. In this paper, we develop a mobile SNS(Social Network System) that does not necessitate any infrastructure support using the Bluetooth technology and the mobility based information dissemination technique. Using so-called mobility assisted data dissemination technique we overcome the short radio range restriction of WPAN technologies. We develop Blue Market, a free online marketplace program, as a proof of concept.