• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.04a
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• pp.233-236
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• 2011

GPS 기반의 위치관제 시스템은 현재 교통, 물류관제, 보험, 보안 등 다양한 분야에서 활용되고 있다. 재난 재해관리를 방재 분야에서도 다양한 형태의 위기 상황에 대응하기 위해 재난 재해 종류 및 규모별로 다양한 정보자원을 이용해야 하고 인적 물적 자원을 활용하여 빠르게 대응해야 한다. 특히 산불, 산사태, 태풍, 홍수해 등의 광역의 자연재해뿐만 아니라 주요시설물 및 문화재 등의 인위적 재난 방재 분야에서도 중앙정부 차원의 U-ICT기술을 이용한 실시간 통합 예방 대응관리 시스템이 필요하다. 본 연구에서는 스마트 폰 및 GPS-CDMA단말기를 이용한 산불을 사례로 한 '자연재해관제시스템' 개발과 함께 문화재를 대상으로 한 'LBS기반 문화재위험관리시스템'에 대한 구현 방법에 대하여 제안하며 기존의 인적 자원과 물적 자원의 총괄적인 관리와 차세대 문화재 위험관리 시스템 구축 방향을 제시하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.507-510
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• 2011

As the amount of the wireless mobile products like a 'Smart phone' used increases, the studies about the Location Based Service (LBS) is highly increasing. Outdoor location determination can use the GPS which is built-in in the wireless mobile products. However, it is not possible to use GPS inside the huge cruise bigger than a normal building, it is regarded to consider Indoor location determination which is appropriate at the inside environment. Wi-Fi (Wireless Fidelity) does not need an extra installation process because it is already installed here and there inside the building. In this respect, Wi-Fi has low price competitiveness compared to other wireless sensor products. In this paper, I will introduce 'Bayesian Algorithm' which can recognize useful space with Wi-Fi signal.

• Journal of Digital Contents Society
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• v.9 no.3
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• pp.483-490
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• 2008

In this paper, we propose an active location acquisition terminal needing to construct an infrastructure based on a LBS and analyze the performance in real field. The proposed terminal is compounded with a GPS module and a CDMA module, so it can get the location information independently using satellite GPS signal and the proposed terminal can decide a user location with the location information of a base station in satellite GPS shadowed area. This is the distinguishable location acquisition method from the conventional A-GPS, and it complements a disadvantage of the conventional GPS. From these results, we can confirm that the proposed active location acquisition terminal is suitable to the requirements for the LBS which are the independent location acquisition ability, the continuity in the location information acquisition and the maintenance in the location information security.

• Information and Communications Magazine
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• v.28 no.11
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• pp.3-8
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• 2011

본 논문에서는 스마트 폰 시대를 맞이하여 급성장하고 있는 LBS 기술에 대해 고찰하였다. 특히 이동통신에서 주로 이용하는 위치측위 기술표준화 현황과 GPS 핵심부품을 분석하였으며 측위 정확도를 개선할 수 있는 대안도 제시하였다.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.22 no.2
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• pp.105-116
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• 2004

According to the developing advanced techniques and removal of Selective Availability, much research has been conducted to improve the accuracy of GPS positioning in absolute and relative mode by estimating the nuisance parameters such as atmospheric effect, clock errors and multipath. Especially, the continuous effort of establishing the CORS in many countries and the effort of ICS making effective global networking make more application areas and the necessity of more precise location is being increased. Some of the countries like German, Japan and Swiss already utilized the Virtual Reference System for better location accuracy and services. In this study, the VRS system is investigated in terms of system principle, required H/W and S/W, management and operation, revision of related law, expected application and market etc. and find optimal solution in each aspect for economic and fast set up of the system in this country. The analysis of Korean CORS, communication infra and market estimation is performed for the efficient system establishment. Also. the suggestion on the advertisement and education of the system is also included. It is expected that this study contributes for the establishment of effective and precise nationwide location service so that many SOC areas including navigation, GIS, Telematics, LBS can provides better service for the users.

• Journal of Korea Game Society
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• v.4 no.3
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• pp.3-10
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• 2004

With 3.6 million user of mobile phone, there has been a rapid develop ment of advanced mobile game taking advantage of various mobile phone functions. Most of all, LBS(location-Based Service) mobile game is expected to make a new mobile game market which is totally different from the previous one. The purpose of this paper, thus, is to review the present condition of LBS mobile game and possibilities. Furthermore, it is also to analyze the facing problems to solve and find the way to promote the LBS mobile game service.

• Journal of the Korean Institute of Intelligent Systems
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• v.14 no.7
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• pp.865-870
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• 2004

Development of new information and traffic technology causes fast-growing in the field of information-based system. At recent, development of LBS(Location Based Service) makes a remarkable growth of industry as GPS(Global Positioning System) becomes wide-spread and location information becomes more important. However, there is a problem like infringement of privacy when location information is used improperly［1］. In this paper, LBS platform is proposed in order to prevent infringement of privacy. To implement, we classify user path as pattern in a zone of user life. Thereupon, location information is provided according to user' specific situation.

• The KIPS Transactions:PartA
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• v.13A no.5 s.102
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• pp.435-444
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• 2006

Recently, various applications of location trigger service have been required and developed as users of location-based services are increasing. The location trigger is detecting event of entering in, existing in or leaving from pre-specified area, and then alerting by short message service, an e-mall or servicing other pre-defined action to mobile subscribers. The conventional methodology of supporting location trigger is detecting location trigger events as periodical requesting location of mobile communication terminal to location gateway server in mobile communication network. But these conventional methods cause mobile communication interruption when the location trigger services are overloaded; thereby inducing performance of core server to be fell off. So in this paper, we have studied a new location trigger technology, named multilevel location trigger, to reduce mobile core network sewer triggering bottleneck and power consumption caused embedded GPS device of mobile phone. Actually, as design and evaluating the performance of location trigger after building test-bed environment, we contribute toward improving echnology of location trigger.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.1300-1302
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• 2008

최근 위성을 통한 위치정보서비스를 이용하여 응용서비스를 제공하려는 움직임이 늘고 있다. 이처럼 위치기반서비스(LBS: Location Based Service)를 제공하려는 현재의 추세를 볼 때에 단말에 위치기반을 위한 기능은 필수적인 추가사항이며 이를 위한 단말의 부담은 고려해야 할 사항이다. 그러나 A-GPS(Assisted GPS) 기술 중 A-GPS Server(Assistance GPS Server)을 이용함으로써 단말에 부담을 적게 하면서 위치기반의 서비스를 제공받을 수 있고, 핸드오버 지연을 효과적으로 줄일 수 있다면 1 석 2 조의 효과를 얻을 수 있게 된다. 본 논문에서는 기존 PMIPv6(Proxy Mobile IPv6) 메커니즘에 A-GPS Server 를 두어서 효과적인 핸드오버 수행과정을 거치고, 위치기반서비스(LBS)를 제공하는 메커니즘을 제안한다.

• The Journal of the Convergence on Culture Technology
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• v.1 no.1
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• pp.79-85
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• 2015

According to the growing use of the personal GPS in the mobile device recently, the LBS (Local bases service), which processes and refines the GPS information, such as a position-tracking service, a public safety service, a local based information service, has increased steadily. Due to the refraction or reflection of GPS, however, it is impossible to use GPS around or in buildings. Therefore, it is necessary to correct the errors of GPS. We propose the method which corrects the errors of GPS and creates the refined trajectory using intersection region indexing. After analyzing the trajectory, receiving trajectories from many people and identifying the similarity between of trajectories, we will recommend the favorite route and useful information such as restaurant, convenience store, bus station and emergency call service.