• 한국컴퓨터정보학회논문지
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• 제23권9호
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• pp.51-56
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• 2018

Currently, many households raise their companion animals for personal reasons. In this environment, the companion animal is left alone in the home, the owner of the companion animal is increasingly curious about the behavior pattern of the companion animal left alone, and there are many devices that can solve this question. In this paper, we have designed and implemented a Bluetooth-based slave device (beacon in this paper) and a router capable of connecting to a broadband network that can observe behavior patterns of companion animals by using advanced ICT technology. The Bluetooth router designed and implemented in this paper installs a beacon in the home, receives the beacon signal from the device and the beacon installed by the companion animal, and transmits the moving line of the companion animal to the owner of the companion animal through the broadband network, so that it can be confirmed in real time through the app for the provided smart phone.

• 한국통신학회논문지
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• 제33권3B호
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• pp.112-122
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• 2008

블루투스 시스템은 피코넷을 기반으로 네트워크를 형성하여 데이터를 전송한다. 하나의 피코넷에는 하나의 마스터 장치와 최대 일곱 개의 슬레이브 장치로 구성될 수 있다. 폴링기법을 사용한 피코넷의 마스터 장치는 잡 스케줄러를 수행하여 피코넷의 모든 슬레이브 장치들에게 데이터 전송 기회를 제공한다. 최대 데이터 전송률은 두개의 블루투스 장치로 이뤄진 피코넷에서 ACL 링크의 DH5형태의 패킷을 사용할 경우이다(최대 데이터 전송률: 723.2 kb/s). 그러나, 한 개의 마스터 장치와 두 개의 슬레이브 장치로 구성된 피코넷의 경우, 마스터 장치는 접속된 모든 슬레이브 장치에게 동등한 데이터 전송률을 제공해줘야 하기 때문에, 데이터 전송률은 절반(361.6 kb/s)으로 줄어든다. 그리고, 스캐터넷에서의 데이터 전송률은 더욱 낮아(최대 전송률: 302.2 kb/s) 지는 단점이 있다. 본 논문에서는 여러개의 피코넷으로 이루어진 스캐터넷에서의 낮은 데이터 전송률을 해결하기 위하여 "더블피코(DoublePico)"라 불리는 새로운 애드혹 네트워크 형태를 제안한다. 또한, 본 논문에서 제안된 더블피코는 블루투스를 이용한 애드혹 네트워크에서 높은 데이터 전송률(최대 전송률: 457.57 kb/s)을 제공한다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제7권1호
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• pp.17-21
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• 2007

Multi-Agent Robotic System (MARS) is 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 MARS, a robot contains sensor part to percept the situation around themselves, communication part to exchange information, and actuator part to do given 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. For the purpose, the communication system must have several features-separated module, flexible interface. We will discuss how to construct and what kind of procedure to develop the communicating system.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2000년도 추계종합학술대회
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• pp.239-242
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• 2000

Bluetooth는 핸드폰, PDA, 노트북과 같은 포터블한 장치들간의 양방향 근거리 통신을 복잡한 전선 없이도 저가격으로 구현하기 위한 근거리무선통신 기술, 표준, 제품을 총칭하여 일컫는다. Bluetooth의 기술개발, 시장 형성을 위해 구성된 통신, 컴퓨터, 네트웍 관련 유수 회사들의 협력체 SIC에 의해 사실상 표준안 마련되었다. SIC는 유럽의 Ericsson이 중심이 되어, 현재 1,800여 회원사가 있으며 계속 증가 추세에 있다. SIC에 의해 99년 8월에 버전 1.0 Bluetooth 규격 발표되었으며, 핵심 부품을 비롯한 소프트웨어 개발 키드 등의 제품 출시를 목전에 두고 있다. 본고에서는 Bluetooth SIC를 중심으로 한 Bletooth 기술개발 및 표준화 현황을 조사 분석하였다

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권8호
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• pp.3657-3682
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• 2018

This paper presents a Bluetooth and pedestrian dead reckoning (PDR)-based indoor fusion localization approach (BtPDR) using smartphones. A Bluetooth and PDR-based indoor fusion localization approach can localize the initial position of a smartphone with the received signal strength (RSS) of Bluetooth. While a smartphone is moving, BtPDR can track its position by fusing the localization results of PDR and Bluetooth RSS. In addition, BtPDR can adaptively modify the parameters of PDR. The contributions of BtPDR include: a Bluetooth RSS-based Probabilistic Voting (BRPV) localization mechanism, a probabilistic voting-based Bluetooth RSS and PDR fusion method, and a heuristic search approach for reducing the complexity of BRPV. The experiment results in a real scene show that the average positioning error is < 2m, which is considered adequate for indoor location-based service applications. Moreover, compared to the traditional PDR method, BtPDR improves the location accuracy by 42.6%, on average. Compared to state-of-the-art Wireless Local Area Network (WLAN) fingerprint + PDR-based fusion indoor localization approaches, BtPDR has better positioning accuracy and does not need the same offline workload as a fingerprint algorithm.

• Biomedical Engineering Letters
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• 제8권4호
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• pp.365-371
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• 2018

Uninterrupted monitoring of multiple subjects is required for mass causality events, in hospital environment or for sports by medical technicians or physicians. Movement of subjects under monitoring requires such system to be wireless, sometimes demands multiple transmitters and a receiver as a base station and monitored parameter must not be corrupted by any noise before further diagnosis. A Bluetooth Piconet network is visualized, where each subject carries a Bluetooth transmitter module that acquires vital sign continuously and relays to Bluetooth enabled device where, further signal processing is done. In this paper, a wireless network is realized to capture ECG of two subjects performing different activities like cycling, jogging, staircase climbing at 100 Hz frequency using prototyped Bluetooth module. The paper demonstrates removal of baseline drift using Fast Fourier Transform and Inverse Fast Fourier Transform and removal of high frequency noise using moving average and S-Golay algorithm. Experimental results highlight the efficacy of the proposed work to monitor any vital sign parameters of multiple subjects simultaneously. The importance of removing baseline drift before high frequency noise removal is shown using experimental results. It is possible to use Bluetooth Piconet frame work to capture ECG simultaneously for more than two subjects. For the applications where there will be larger body movement, baseline drift removal is a major concern and hence along with wireless transmission issues, baseline drift removal before high frequency noise removal is necessary for further feature extraction.

• 한국항행학회논문지
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• 제6권2호
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• pp.158-167
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• 2002

본 논문은 Bluetooth 환경에서 SAR-QT (Segment And Re-assembly Quick Transfer) 알고리즘을 사용하여 WAP (Wireless Application Protocol) 성능을 향상시키기 위한 WAP 패킷의 전송 시간을 분석하였다. 이러한 WAP의 전송 능력을 향상시키기 위한 한 방법으로 SAR-QT의 과정은 WTP (Wireless Transaction Protocol) 상위 계층에서 내려온 전체 메시지를 분할한 다음 베이스밴드에서 패킷을 전송하게 된다. 그리고 Bluetooth 피코넷 환경에서 SAR-QT 알고리즘을 사용하여 Bluetooth 패킷 타입 중 DM (Data-Medium rate) 1, DM3, DM5에 따른 WAP over Bluetooth의 패킷 전송 시간을 분석하였다. 이 SAR-QT 알고리즘은 멀티 슬롯으로 전송할 경우 L2CAP (Logical Link Control And Adaptation Protocol) 에이스밴드 패킷 전송 시간을 감소시킨다. 결과로부터, WAP over Bluetooth 환경에서 WAP 패킷의 전송 시간을 줄이기 위해서 WTP 패킷 크기가 증가해야 한다는 점을 알 수 있었다 또한, 이러한 무선 채널을 고려한 Rician 페이딩 환경에서 WAP over Bluetooth의 적당한 패킷 크기를 구할 수 있었다.

• 대한임베디드공학회논문지
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• 제13권1호
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• pp.9-15
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• 2018

This paper describes the applicability of Bluetooth and ZigBee networks for real-time control in wireless networked control system and suggests an effective usage of them. The Bluetooth SCO link, SPP and HID profiles and the ZigBee non-beacon enabled network are analyzed and the latency of them are measured. A number of wireless networked control system experiments are performed via DC motor control system and the various profiles of Bluetooth and ZigBee in real-time wireless networked control system are compared.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 추계학술대회 논문집
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• pp.257-260
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• 1997

Bluetooth is the most promising network paradigm which ca open the new area in the information technology. Especially, bluetooth can link all the electrical products and PCs(Personal Computer) to cellular phone or PDA. In this paper, the data from ECU which are gathered by scanner are communicated between tow PCs using the bluethooth modules. The acquired data are ECU's self diagnosis signal and sensor output signal. Self diagnosis signals are very important to check the ECU's state and sensor output signals. Using these data, the possibility of wireless communication with ECU is developed and verified. Protocol stack of bluetooth is L2CAP through HCI and wireless communication software of ECU's signal is developed using VC++ in Windows 98 environment.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 추계학술대회 논문집
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• pp.383-384
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• 2012