• Title, Summary, Keyword: Bluetooth

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A study on the identification system of an object using Bluetooth Scatternets (블루투스 스캐터넷을 이용한 물체 인식 시스템에 관한 연구)

  • Kang Tai-Kyu;Leem Sung-Soo;Kim Chul-Hwan;Lee Key-Sea
    • Proceedings of the KSR Conference
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    • pp.587-593
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    • 2003
  • There has been much interest in the Bluetooth technology since it could enable users to connect to a wide range of computing and telecommunication devices without the need to carry or connect cables. It delivers opportunities for rapid, ad-hoc connections, and in the future, could possibly enable automatic, unconscious, connections between devices. In this paper, we discussed a scatternet formation protocol for Bluetooth-based ad hoc networks and proposed the identification system of an object using Bluetooth Scatternets. Over the past few years, several studies have been made on the identification of an object by several RF(Radio Frequency) systems. But there are still some problems, the interference of signals as an example, for the identification of an object. The critical question is how to identify an object precisely without the interference of signals. This paper is an investigation of the Scatternet formation protocol for Bluetooth-based ad hoc networks and the identification system of an object using Bluetooth Scatternets composed of multiple Piconets.

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Attack Analysis of Bluetooth Electrical IT equipment in Smart Grid (Smart Grid에 사용된 Bluetooth 전기IT기기에 대한 공격 분석)

  • Song, Jin-Young;Park, Dea-Woo;Kim, Eung-Sik
    • Proceedings of the Korean Society of Computer Information Conference
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    • pp.91-94
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    • 2011
  • Smart Grid에 사용되는 전기IT기기에서 Bluetooth의 보안 취약점이 발견되고 있다. 특히 전기안전을 위한 감시센서 정보전달을 맡고 있어서 위험성은 더욱 커진다. 본 논문은 Bluetooth가 탑재된 전기IT기기에 대한 Hacking Tool 분석을 실시하고, Bluetooth 취약점을 이용한 DoS, Sniffing공격 등 Tool 공격을 실행하고, Smart Grid와 U-IT 전기기기와 전력망에 대한 보안 방안 제시를 한다.

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An Implementation of an Open Source Based H.264 Video Player for Bluetooth Input (블루투스 입력의 오픈 소스기반 H.264 비디오 플레이어의 구현)

  • Park, Taejun;cho, Tai-Hoon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.193-195
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    • 2009
  • Bluetooth is a popluar wireless data transmission method with low power consumption. In this paper, we present a open source based player of video stream encoded by H.264 codec, which is transmitted via Bluetooth. An open source JM is used for H.264 decoding and modified for reading H.264 encoded data via Bluetooth. For display of decoded video data, SDL was utilized.

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Transmission of Image Information in Wireless System (무선 환경에서의 영상 정보의 전송)

  • Jeonh, Sang-Hoon;Lim, Joon-Hong
    • Proceedings of the KIEE Conference
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    • pp.268-270
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    • 2004
  • There are various researches on MPEG techniques. MPEG technique is used to digital TV(DTV) and internet image communication. Connection method between server and client is usually using wire. Applications may be expanded, if wireless technology is used between server and client system. In this paper, Bluetooth is used for connection method between server and client. Bluetooth offers fast and reliable transmissions of both voice and data over the globally available 2.4GHz ISM (Industrial, Scientific and Medical) band. One of the major application purposes of Bluetooth is the cable replacement for mobile and peripheral devices. Bluetooth has the advantage of small size, low power and low cost. It has the disadvantage of limited bandwidth and limited range. In order to transfer effectively image Information between server and client using Bluetooth, we apply MPEG-2 and MPEG-4 image compression techniques and the results are compared with each other.

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A research of direct data transmission and automatic pairing process through service server among Bluetooth devices (서버를 통한 Bluetooth 기기 자동 연결 및 데이터 직접 송수신 기법 연구)

  • Park, Jaeman
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.736-737
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    • 2012
  • 블루투스(Bluetooth)는 일반적으로 10m 안팍의 휴대폰, 노트북 등의 휴대기기를 서로 연결해 정보를 교환하는 근거리 무선 기술 표준이다. 이 표준 기술은 이어폰이나 기기간의 페어링을 통하여 정보를 공유하기위한 단일 서비스 제품으로 자주 사용되기도 하며, 스마프폰에서는 이 표준 기술을 제어하여 명함이나 개인의 사진, 동영상 그리고 문서파일등을 공유하기 위한 방식으로 활용되기도 한다. 하지만 가장 큰 문제는 Bluetooth 를 응용하여 기기간의 페어링을 진행하는 절차가 일반적 사용자에게는 너무 복잡하고, 기술적인 처리 방식을 요구함으로써 대중화된 서비스를 지원하기에는 부족한 점이 많다. 따라서, 본 논문에서는 Bluetooth 환경하에서 사용자에게 직접적인 파일 전송을 지원하기 위해 서비스 서버에서 각 단말의 정보를 통합 수신하고, 이를 각 단말에 전달하여 각 단말이 자동적으로 Bluetooth 연결을 구성하고 서비스는 이를 활용하여 Direct 하게 파일을 송수신하는 간결화된 근거리 기반의 통신 연결 서비스 구성 방식을 제안하고 이를 증명하고자 한다.

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A Capacity Modeling of Bluetooth Access Points for Location Based Service with Mobile Phone and Bluetooth

  • Kim, In-Hwan;Shin, Soo Young;Song, Young-Ho;Chung, Ki-Dong;Jeong, Gu-Min
    • Journal of Electrical Engineering and Technology
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    • v.8 no.1
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    • pp.183-189
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    • 2013
  • In this paper, we propose a capacity modeling method for Bluetooth based LBSs (Location Based Services) between Bluetooth APs(Access Points) and mobile phones. In order to do this, we consider the entrance and exit of the users to and from the AP. Using parameters such as the connection time, data transmission time and number of users in the AP zone, we analyze the capacity of a Bluetooth AP using an appropriate queuing model. The required number of APs in a certain zone is estimated from the number of users in the zone using the proposed queuing model. By performing simulations and experiments, the validity and applicability of the proposed method are verified.

Advanced Indoor Zone Detection with Bluetooth and Ultrasound of Smartphone (스마트폰의 블루투스와 초음파를 이용한 향상된 실내 영역 결정)

  • Kwon, Jin-Se;Lee, Je-Min;Kim, Hyung-Shin
    • IEMEK Journal of Embedded Systems and Applications
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    • v.11 no.3
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    • pp.135-141
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    • 2016
  • Indoor zone-based services have continuously become popular by increased prevalence of smartphones. Bluetooth and ultrasound can be used for zone detection. However, bluetooth does not guarantee precise zone detection if the signal degrades due to the obstacles. Ultrasound can be easily forged by recording sound on the smartphone. For that reason, zone detection based on ultrasound has a security hole. To remedy each limitation, we propose an advanced zone detection method, that combines bluetooth and ultrasound. An authentication server issues a one-time password to the user over bluetooth. The user generates an ultrasound signal that encodes the password. In this manner, the proposed method ensures secure and accurate zone detection.

A Secure Bluetooth Piconet using Non-Anonymous Group Keys (비익명성 그룹키를 이용한 안전한 블루투스 피코넷)

  • 서대희;이임영
    • Journal of KIISE:Information Networking
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    • v.30 no.2
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    • pp.222-232
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    • 2003
  • In accordance with the changes in the wireless communication environment, there has been a great need to satisfy the demand for diverse modes of information exchange. Various types of short-distance wireless communication technology have been developed and studied to meet this demand. Among them, Bluetooth which has recently been acclaimed as the standard for short-distance wireless communication, has been the focus of many such studies. However, Bluetooth has weaknesses in its suuity features when its in security services are applied to Home networks. The purpose of this study is to propose a safe Bluetooth scenario with an upgraded suity feature. This paper first reviews the general characteristics and security features of Bluetooth together with an analysis of its weaknesses, and presents the formation and maintenance process of Bluetooth piconet what is created by using ECDSA and group key in the ACL(Asynchronous Connection-less Link) connection through a safe Bluetooth inquiry process.

A Study on the Network Throughput of Bluetooth Packet Communication System for Short Distance Wireless Connectivity (근거리 무선 연결을 위한 블루투스 패킷 통신 시스템의 네트워크 처리율에 관한 연구)

  • Ye, Hwi-Jin;Kim, Moon;Kim, Seong-Chul;Roh, Jae-Sung
    • Journal of Advanced Navigation Technology
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    • v.11 no.3
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    • pp.281-287
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    • 2007
  • The Bluetooth technology represents an attractive approach to enable short distance wireless connectivity. The Bluetooth standard operates at the 2.4 GHz ISM band and offers the advantage of establishing ad hoc networks, called piconet and scatternet. The spread of Bluetooth implementation in consumer products opens up a new short range wireless networking applications. Bluetooth MAC avoids packet collision within a piconet by simple time multiplexing. But lack of synchronization among independent neighboring piconets introduces packet overlapping within a time slot. In this paper, the wireless network throughput of Bluetooth packet transmission system applying the pure-ALOHA and slotted-ALOHA MAC is investigated according to the impact of channel environment. From the obtained results, the throughput of the Bluetooth MAC protocol shown to offer good performance in wireless channel, and the results are useful for the implementation of Bluetooth networks.

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A Study on the Quality-of-Experience in Mobile Video Adaptive Streaming under Active Bluetooth Connection (와이파이-블루투스 콤보칩 사용이 모바일 비디오 스트리밍 서비스에 미치는 영향 분석)

  • Lee, Jongho;Choi, Jaehyuk
    • Journal of IKEEE
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    • v.24 no.1
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    • pp.46-51
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    • 2020
  • With Wi-Fi and Bluetooth connectivity becoming more common in today's handheld mobile devices, single-chip multi-radio combo-modules, which integrate two or more heterogeneous wireless radios on a single chip, are becoming more and more popular. The key requirement for combo solutions is that the quality of the user experience (QoE) must not be compromised by degrading connectivity performance. Therefore, characterizing and understanding the behaviour of combo-module is of vital importance to ensure this requirement in various environments. In this paper, we investigate the impact of the use of combo-modules on the performance of mobile video streaming over a Wi-Fi network. Our study reveals that the use of combo-modules incurs considerable side effects on QoE for mobile video streaming applications when the Wi-Fi and Bluetooth operate at the same time in the 2.4GHz ISM band. We reveal that rate-based adaptive algorithms, including the most popular adaptive bitrate streaming MPEG-DASH, is more severely affected by this phenomenon than buffer-based adaptive algorithms.