• 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.

• KIISE Transactions on Computing Practices
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• v.22 no.6
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• pp.268-277
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• 2016

IoT (Internet of Things) technologies have largely contributed to our smart living environment. The smart parking system is one of the prominent services that IoT supports. To identify the parked vehicles, the previous parking system use special identifying devices, the RFID tags carried by the users, and the high quality camera to recognize the vehicle license numbers. However, the previous methods cause cost inefficiency and unfriendly usages. To address these problems, we propose a smart parking system based on ultrasonic sensors and Bluetooth communication. The proposed system decides the available slots by using the sensor motes located in the parking spaces. Also it recognizes the location of the parked vehicle using Bluetooth RSSI between a Smartphone and the sensor motes. In addition, based on these converging technologies, it can support the parked routes of vehicles for users. To evaluate the implemented smart parking system, we applied the RSSI transform equations and the recognition rate for parked vehicles. As a result, the accurate rate of transformed distances could be measured.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.6
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• pp.207-213
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• 2014

In this paper, we propose Bluetooth based on efficient indoor-emotion-lighting control system. The proposed Bluetooth based on indoor-emotion-lighting control system was designed to be automatically controlled by the motion sensor light and using a Bluetooth module may be controlled to light up or mobile PC, wall pad. In addition, It was designed the LED lighting On/Off control the environment according to Humidity, the temperature, illumination, motion sensors. System based on the bluetooth is automatic control possible using the illumination sensor, and by selecting the desired lighting partial control can be designed. The experimental efficiency results of the proposed indoor-emotion-lighting control system were designed to provide an internal environment adapted to a resident, were able to maximize the energy savings, have reduced power consumption than the traditional simple On/Off control system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.10a
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• pp.941-944
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• 2003

This paper implement Telemetry System which is used Bluetooth. This System propose system which can detect a total amount of gas, electricity or water without a motorman, at home. BlueTooth is a close range wireless communication technology which uses a wireless frequency 2.4GHz and has a high trust and self - error correction technology according to a low power consumption quality and a high-speed frequency hopping. This makes get a high trust concerning a data transmission than an existing modem. In addition, though wireless modem is restricted by a minimal of a wireless terminal, it will be possible to coincide with the function of the portable with the low power consumption quality by using Bluetooth. And as the system on a chip of module progresses, the possibility of the snail size is present. And, Motorman who use mobility of embedded system can detect detect a total amount of gas, electricity or water outdoor. Embedded system use ARM processor that is low power processor. So it ran use long time efficiently.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05b
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• pp.1097-1100
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• 2003

본 논문에서는 최근 유선을 대치하기 위해 등장한 여러 가지 근거리 무선통신 방식 중 블루투스 기술과 시스템의 안정성 및 리소스의 효율적 사용을 위한 멀티태스킹이 가능한 RTOS(uC/OS)를 이용하여 투선 비디오 도어폰을 설계 및 구현해 본다. 송신기는 카메라, 비디오 디코더, 영상 압축칩 프로세서(ARM7TDMI), 메모리, 블루투스 모듈 등을 이용하여 임베디드 시스템을 구성하였고, 수신기는 블루투스 모듈을 통해 수신된 영상 데이터를 모니터에 디스플레이 할 수 있다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.10
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• pp.2185-2191
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• 2012

The monitoring of the existing inverter is being implemented using a local computer of web monitoring, but in this paper, the remote monitoring system of the power condition system was implemented using a Bluetooth communication at a convenient position for the user that can be monitored without the computer. The proposed system was designed to be able to monitor the wanted information by using the protocol of inverter. Also when the power condition system has failed, the fault history and the generated time of inverter were stored in the Bluetooth device. Finally the performance of the proposed system was evaluated through experiments, it showed the good performance and the possibility of commercialization.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.05a
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• pp.626-629
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• 2021

Recent home appliances requires convenience and low-power consumption. A convenient devices should be simple to control while having several functions. Intelligent sensors and utilization technologies are required to reduce energy consumption. This paper provides a smart drying system with Bluetooth communication function and energy reduction function. Design a control system that uses the Bluetooth function so that the smartphone monitors the drying control and the internal humidity condition. By detecting the humidity inside the dryer and controlling the speed of the motor, it has an energy-saving function.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.05a
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• pp.224-226
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• 2021

Recently, in order to increase the efficiency of the product production process, the automation of facilities and devices in the factory is in progress, and a smart factory is being built using ICT and IoT technologies. In order to organically solve many problems occurring in the smart factory, a system for monitoring the wireless communication function between facilities and devices and the manufacturing process environment of the smart factory is required. In this paper, we propose a monitoring system using a Bluetooth module, a temperature/humidity sensor and a fine dust sensor to remotely monitor the process environment of a smart factory. The proposed monitoring system collect Arduino sensor values wirelessly through Bluetooth communication.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04a
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• pp.340-342
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• 2001

본 논문에서는 홈네트워크에서 반드시 필요하게될 무선데이타통신 전송기술로서 블루투스 인터페이스의 상위 프로토콜 스택중 소프트웨어와 관련된 HCI(Host Controller Interface), L2CAP(Logical Link Control and Adaptation Protocol), SDP(Service Discovery Protocol)레이어에 관해 정의를 하고, 홈네트워크 미들웨어로서 자바를 기반으로한 Jini 시스템의 서비스제공자(services) 서비스관리자(Lookup service), 서비스이용자(client)간의 통신 구조에 대해 살펴본다. 블루투스 인터페이스를 이용한 Jini 시스템에서 client에 PDA, service로는 프린터로 구성하여 이에 기반한 여러 프로토콜의 사용을 설명하고 현재 SA-1110 보드상의 Jini 시스템을 구현중인 모델의 구성과 원격제어를 위한 향후 확장계획에 대해 간단하게 소개한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1732-1735
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• 2015

본 논문은 최근 정보통신의 발전과 보급을 이용하여 스마트홈을 비싼 비용을 들여 구축하는 것이 아니라 기존의 인프라와 국민 대다수가 가지고 있는 스마트폰 그리고 아두이노를 사용하여 저렴한 비용으로 스마트홈을 구축하는 것을 목표로 한다. 스마트 조명 제어 시스템을 구축할 통신 수단을 선택하기 위해서 각 통신 수단의 대역과 송/수신 범위를 비교 및 분석하였다. 그 결과 통신 수단으로는 블루투스를 사용하고 아두이노를 사용하여 기존 가전시설을 최대한 활용할 수 있게 하였다. 스마트 조명 제어 장치를 구성하는데 아두이노 우노 보드, 마이크로 서보 모터, 블루투스 모듈, 전원장치로 이루어진 컨트롤러와 컨트롤러를 제어하는 애플리케이션 두가지를 사용한다. 스마트폰에서 애플리케이션으로 컨트롤러를 조작하고 컨트롤러가 조명스위치를 조작하여 조명이 ON/OFF된다. 제안한 시스템으로 조명 제어 시스템뿐만 아니라 기존의 고비용 스마트홈 솔루션을 대체할 수 있을 것 으로 기대된다.