• 한국정보통신학회논문지
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• 제6권5호
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• pp.676-683
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• 2002

본 연구는 블루투스 모듈이 장착된 임베디드 시스템에 리눅스를 포팅하고 리눅스 커널상에 서 블루투스 프로토콜 스택을 작성해 LAN Access Point를 구현하는 것을 목적으로 한다. 임베디드 시스템을 위한 하드웨어를 구성하고 블루투스 모듈을 장착해서 리눅스 커널을 포팅한 후 Ethernet 디바이스 드라이버와 블루투스 프로토콜 스택을 작성해서 LAN Access Point를 구현한다. 블루투스 모듈이 장착된 PC를 클라이언트로 LAN Access Point를 통한 TCP/IP 통신의 가능성을 검증한 결과 블루투스 LAN Access Point를 통한 클라이언트의 Telnet, FTP, 웹브라우저 프로그램 등의 실행이 가능함을 확인하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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• pp.435-437
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• 2004

In this paper, we aim to design and implement supporting IPv6 Bluetooth Access point(AP) in Linux. Bluetooth is a cable replacement technology designed for short range ad-hoc connections, which most likely change the way we handle and access information in the near future. In Personal Area Network(PAN) mobile devices need many IP address space, then we need next generation Internet Protocol(IPv6). We designed Bluetooth Access Point with Bluetooth stack and MAC bridge function in Linux. The implementation tested on Linux system based on Bluetooth Access Point with other Bluetooth devices.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.778-781
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• 2005

In this paper, we describe a development of a Bluetooth Access Point for the WAN connection of home network devices. Especially, users can access the PSTN at home instead of expensive digital cellular network through the AP, using the 'one-phone', which is the Bluetooth enabled cellular phone. The simultaneous benchmark test about telephone service and LAN access service shows the perfect compatibility and reasonable performance of the access point. The one-phone service can become a convergence of wired and wireless communication through the AP.

• 정보처리학회논문지A
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• 제11A권6호
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• pp.433-438
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• 2004

본 논문에서는 가정에서 블루투스 장비를 이용하여 액세스 네트워크에 접속하기 위한 블루투스 접속장비(AP)의 개발을 제안한다. 헤드셋, 마우스, 키보드 등과는 달리 AP는 다중 접속 및 안정된 네트워크 처리량을 유지할 수 있는 능력을 갖추어야 한다. 제안된 AP는 다양한 종류의 블루투스 장비들이 xDSL이나 PSTN으로 이루어진 액세스 네트워크에 안정적으로 접속하게 한다. 특히, 가정 내에서 AP는 사용자들이 one-Phone-블루투스 모듈이 포함된 셀룰러 전화기-을 이용하여 상대적으로 비싼 CDMA 네트워크 대신 PSTN에 접속할 수 있게 한다.

• 제어로봇시스템학회논문지
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• 제10권11호
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• pp.1052-1057
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• 2004

Bluetooth technology is essentially a method for wireless connectivity of a diverse set of devices ranging from PDAs, mobile phone, notebook computers, to another equipments, The bluetooth system both point-to point connection and point-to multipoint connection. In point-to multipoint connection, the channel is shared among several bluetooth devices. Two or more devices sharing the same channel form a piconet. There one master device and up to seven active slave devices in a piconet. The radio operates in the unlicensed 2.45GHz ISM band. This allows users who travel world-wide to use bluetooth equipments anywhere. Since the link is based on frequency-hop spread spectrum, multiple channels can exist at the same time. The bluetooth standard ha s been suggested that bluetooth equipments can be used in the short-range, maximum 100 meters. It has been defined that the time takes to setup and establish a bluetooth connection among devices is 10 seconds. It is a long time and may be a cause to lose a chance of finding other non-fixed devices. We propose a routing protocols for scatternets which can be used to control a mobile units(MUs) in this network. The proposed routing protocol is composed of two kinds of bluetooth information, access point(AP) and MU.

• 한국인터넷방송통신학회논문지
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• 제10권5호
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• pp.187-192
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• 2010

본 논문에서는 휴대폰을 이용한 블루투스 기반의 LBS를 위하여 블루투스 AP의 용량에 대한 시뮬레이션 및 분석을 수행하였다. 블루투스의 연결과정 및 데이터 전송에 소요되는 시간을 분석하여 블루투스 AP를 위한 모델을 도출하고 모의 실험하였다. 콘텐츠 크기와 서비스 범주 내의 사용자 빈도를 추가적으로 고려하여 모델링하고 주어진 시간 내에 가능한 사용자 수를 도출함으로써 블루투스 기반의 LBS 서비스에 활용이 가능하도록 하였다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(1)
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• pp.343-346
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• 2002

This paper presents a Prototype system developed for a Bluetooth interfaced VoIP system. The VoIP phone is developed based on tile implementation of a CELP coder on the TI 16bit DSP Processor A PC interfaced with Bluetooth module is used to designing a access point system. Host controller protocol stack is implemented to realize gateway between the wireless and wired line networks. A server application program for user management and call processing, which is based on TCP/IP peer to peer connection, is implemented for tile evaluation of overall interface system.

• 한국멀티미디어학회논문지
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• 제24권6호
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• pp.825-837
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• 2021

The Bluetooth Low Energy profile has the advantage of continuing wireless communication with very little power consumption compared to the existing Bluetooth, so it is widely applied to smart devices. Most of them are applied to Point-to-Point (1:1) communication between Central (Master) and Peripheral (Slave), but can be applied to Point-to-Multiple (1:N) wireless communication through the use of multiple threads and timers. Therefore, in this paper, a precise timer was designed in the BLE profile to devise an image segmentation transmission/reception structure based on multiple access, and a smart image block device applied to it was designed and verified.

• Journal of Electrical Engineering and Technology
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• 제8권1호
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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.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.922-925
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• 2004

Bluetooth technology is essentially a method for wireless connection of a diverse set of devices ranging from PDAs, mobile phone, notebook computers, to another equipments. The bluetooth system supports both point-to-point connection and point-to-multipoint connections. In point-to-multipoint connection, the channel is shared among several bluetooth devices. Two or more devices sharing the same channel form a piconet. There is one master device and up to seven active slave devices in a piconet. The radio operates in the unlicensed 2.45GHz ISM band. This allows users who travel world-wide to use bluetooth equipments anywhere. Since the link is based on frequency-hop spread spectrum, multiple channels can exist at the same time. The Bluetooth standard has been suggested that Bluetooth equipments can be used in the short-range, maximum 100 meters . It has been defined that the time takes to setup and establish a bluetooth connection among devices is 10 seconds. It is a long time and may be a cause to lose a chance of finding other non-fixed devices. We propose a routing protocols for scatternets which can be used to control a mobile units(MUs) in this network. The proposed routing protocol is composed of two kinds of bluetooth information, access point(AP) and MU.