• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.04a
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• pp.143-144
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• 2010

Recently, IALA has introduced AIS AtoN and standardized Aids to Navigation communication system and the World-wide IALA-Net has announced plans to build the system. Systematic beacon network may offer opportunities to make infrastructure for information service and upgrade AtoN service performance. This paper proposes Aids to Navigation information service network for e-NAV. Network based on AIS is consist of AIS AtoN channels as Real, Synthetic or Virtual AIS AtoN. And inner network is consist of Wireless networks as AIS, WCDMA, WIFI, WlBRO, USN or VSAT. Introducing of various network systems can lead to combine and design among land, beacon and service network infrastructures.

• Journal of Satellite, Information and Communications
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• v.10 no.4
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• pp.146-150
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• 2015

The COSPAS-SARSAT committee decides MEOSAR (Medium-Earth Orbit for search and rescue) service development for installing 406MHz SAR instruments on their respective MEO navigation satellite system of the United States, EU, and Russia, since 2000. The transmitted beacon signal is separately arrived by satellites with different FOA (Frequency of Arrival) and TOA (Time of Arrival). It is directly transferred to MEOLUT. In MEOLUT, a LUT track at least 3 or 4 satellites simultaneously and estimate location of beacon using time difference of arrival (TDOA) and frequency difference arrival (FDOA). But the transmitted distress signals may be overlapped each other because the distress beacons transmit signal on mean interval of 50 seconds in arbitrary time. It's difficult that simultaneously estimate location of beacon by current scheme for several overlapped distress signal. So we use cross ambiguity function (CAF) Map algorithm and present Multi-CAF MAP scheme in order to satisfy performance requirement of system. The performance is analyzed for COSAPS-SARSAT MEOSAR.

• Journal of the Institute of Convergence Signal Processing
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• v.21 no.2
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• pp.67-72
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• 2020

AR service using the client-server method and existing physical markers(eg, OR Codes, etc.) causes a delay in the playback time of the contents because the contents download is executed after the marker recognition. In the case of the one-time installation method rather than the client-server method, proactive download of high-capacity contents for playback may cause an inefficiency of the storage space of the device(eg, smartphone, etc.). Therefore, in AR contents playback based on beacon's RSSI to secure the efficiency of the playback device storage space and to quickly play AR contents. The technique for high-speed playback in this study can be applied to various fields such as MICE exhibition using beacon signal.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.224-226
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• 2018

자동차 운전자는 운행 할 때 도로 주변을 살펴 여러 상황에 대비한다. 운전자가 주의하여 운전해도 갑자기 도로에 생긴 장애물 때문에 교통사고가 발생 될 수 있다. 만약 운전자가 사전에 도로위에 장애물 발생 정보를 파악할 수 있다면, 교통사고는 어느 정도 감소 할 수 있다고 예상 된다. 본 논문은 운전자가 운행 할 때 사전에 도로위의 장애물의 정보를 운전자에게 알려주는 비콘 서비스를 제안하고자 한다. 본 논문에서는 BLE(Bluetooth Low Energy)을 기반으로 하여 무선 통신 인프라가 없이도 V2V 통신을 구현하여 사전에 도로 사용자가 설치한 장애물을 알려주는 비콘 장치와 장애물 정보를 수집해 운전자에게 알려주는 장치로 구성된다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.324-325
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• 2017

호텔의 카드 키는 사용자에게 불편함을 줄 뿐 만 아니라, 호텔 측에서는 경제적인 손실을, 전 지구적으로는 전기 에너지의 낭비를 안겨다 준다. 이를 해결함과 동시에, 호텔 사용자의 조금 더 나은, 조금 더 편리한 호텔 이용을 위해 비콘과 연계하여 차별성을 둔 실용적인 호텔 어플리케이션을 제작한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.414-417
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• 2018

본 연구는 화재 재난 발생 시 시야가 확보되지 않는 환경에서 대피할 수 있도록 비상구를 모바일 AR(Augmented Reality 이하 증강현실) 기반의 스마트폰 어플리케이션의 안내를 통해 대피할 수 있는 실용적 기술 적용에 관한 연구이다. 특히 실내 LBS(Location-Based Service)를 위한 기술을 위해 Beacon(이하 비콘)기술과의 적용 연구를 통해서 특정한 공간과 건물 내에서 화재 발생 시 활용할 수 있도록 구체적이고 실용적으로 설계와 제안되었다. 향후 실제 화재가 발생하였을 때 사용할 수 있는 증강현실 및 LBS 기술로써의 활용과 확장을 기대할 수 있을 것이다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.07a
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• pp.25-28
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• 2015

본 논문에서는 현재 서비스 중인 O2O시스템의 문제점인 '비콘 공해'를 해결하기 위해, 협업적 필터링 및 1축 위치 기반 기술을 이용하여 사용자가 원하는 정보만을 수신 받을 수 있는 BLE 비콘 기반의 협업적 필터링을 이용한 O2O정보 서비스 시스템을 제안하고자 한다. 본 시스템은 사용자가 자신이 원하는 정보만을 제공받을 수 있기에 사용자의 '비콘 공해'를 해결하여 줄 수 있다.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.11 no.1
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• pp.89-94
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• 2018

This paper investigated the design method of the smart sensor for implementing IoT (Internet of Things) service. The power supply of sensor consistently acquisting data is based on the energy harvesting technology and designed with piezoelectric transducer not affected by surrounding circumstances. The wireless communication interface for the transmission of data is designed with BLE (Bluetooth Low Energy). BLE is highly adequate wireless communication technology for low power consumption and short distance wireless communication. The main application of BLE is beacon whose usage range is extended from O2O (Online to Offline) service, navigator based on indoor positioning technology, and anti-theft/lost child prevention service to mobile game. This paper studied the method to extend wireless coverage for complementing the short wireless transmission distance of BLE. The wireless sensor network based on CATV network is proposed for the easy construction of BLE sensor network and extended wireless coverage.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.1
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• pp.90-98
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• 2017

Since 2010, SNS was holding the explosive spread of smartphones has created a place of public advertising platform, and it entered the Internet of Things (IoT) is born gradually countdown of the era came to us already. In utilizing a variety of location-based services IoT services (beacon, O2O) The focus of this paper to analyze the differences in satisfaction with the oil layer by experienced users of what is being used. We consider the type and overall utilization of the concepts typical IoT service in the current service is made to expand the contents of the paper. Hypothesis was reconstructed ease, attractiveness, a survey reliability, value four kinds of models, called Honeycomb UX, User Experience Honeycomp Peter Mobil. Company that provides the service IoT in this study are expected to be used as basic data to help provide a more accurate personalized service according to the user's satisfaction difference.

• Journal of Navigation and Port Research
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• v.34 no.5
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• pp.337-342
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• 2010

As AIS AtoN has worked an essential role for aids to navigation, the World-wide IALA-Net has announced plans to build the system. Systematic beacon network may offer opportunities to make an infrastructure for information service and upgrade AtoN service performance. This paper proposes Aids to Navigation information service network for e-NAV. Network based on AIS is consist of AIS AtoN channels as Real, Synthetic or Virtual AIS AtoN. And inner network is consist of Wireless networks as AIS, WCDMA, WIFI, WIBRO, USN or VSAT. Introducing of various network systems can lead to combine and design aomong land, beacon and service network infrastructures.