• Journal of Internet Computing and Services
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• v.18 no.5
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• pp.23-30
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• 2017

For enjoying the convenience provided by location based services, the user needs to submit his or her location and query to the LBS server. So there is a probability that the untrusted LBS server may expose the user's id and location etc. To protect user's privacy so many approaches have been proposed in the literature. Recently, the approaches about using dummy are getting popular. However, there are a number of things to consider if we want to generate a dummy. For example, when generating a dummy, we have to take the obstacle and the distance between dummies into account so that we can improve the privacy level. Thus, in this paper we proposed an efficient dummy generation algorithm to achieve k-anonymity and protect user's privacy in LBS. Evaluation results show that the algorithm can significantly improve the privacy level when it was compared with others.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.436-439
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• 2008

위치기반 서비스(LBS : Local Based Service)는 단연 GPS가 그 중심이라 할 수 있다. 그러나 실외가 아닌 실내에서의 측위는 GPS신호가 도달할 수 없고, 또한 기존에 연구 중인 실내측위 기술들은 여러 가지 문제점을 갖고 있다. 따라서 다양한 서비스가 구현 가능한 ZigBee 기반의 USN내에서 기존의 다양한 센서들이 구동되면서 ZigBee 노드 간의 신호의 세기인 RSSI(Received Signal Strength Indicator)를 활용한 위치측위시스템을 구현한다. 또한 기존의 RSSI를 활용한 실내측위의 문제점들을 보완하기 위하여 신경회로망을 이용한 위측측위 알고리즘을 제안하여 보다 정확하고 안정적인 위치정보 시스템을 구현한다. 따라서 실내위치측위가 필요한 다양한 공공장소에 적합한 위치기반 서비스가 도입될 수 있는 가능성을 제시한다.

• IEMEK Journal of Embedded Systems and Applications
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• v.16 no.5
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• pp.195-200
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• 2021

In this paper, we propose a method for a mobile robot to estimate a specific location of a service provision target using a beacon-tag for the purpose of providing location-based services (LBS) to users in an indoor environment. To estimate the location, the irregular characteristics and error factors of the received signal strength indicator (RSSI) generated from the beacon are analyzed, and the distance conversion function is derived from the RSSI data extracted by applying a Gaussian filter. Then, the distance data converted from the plurality of beacons estimates an indoor location through a triangulation technique. After that, the improvement in the location estimation is analyzed by applying the temporal confidence reasoning technique. The possibility of providing a LBS of a mobile robot was confirmed through a location estimation experiment for a plurality of designated locations in an indoor environment.

• Information Systems Review
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• v.5 no.2
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• pp.37-51
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• 2003

Mobile business noticed as a constructive alternative of e-commerce and e-business is being diversely considered as a new form or subset of e-business. In this study, mobile business is defined as a comprehensive alternative including e-business. The framework of the superset of e-business has two axes: connectivity and mobility. In addition, various cases based on the combination of the components are provided and explained. It is the main characteristic of this study that the element of off-line "mobility" is added to "connectivity" generally used while explaining e-commerce and e-business. For place (or location) is a prerequisite for the feature of mobility, we grope for why and how Location-Based Service (LBS) will take an important role in the development of new e-business models and services. As the real and full-scale beginning of IMT-2000 service and the rapid progress and diffusion of mobile communications services including wireless LAN require an immense and innovative way of thinking about e-commerce and e-business, the framework suggested in this study is considered to go far toward satisfying the new needs in this area.

• 전기의세계
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• v.53 no.5
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• pp.41-47
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• 2004

최근 들어 무선 인터넷 시장이 형성되면서 이동성을 기반으로 하는 서비스에 대한 관심이 급증하고 있다. 그리고, 휴대폰, PDA와 같은 휴대용 단말기의 사용이 일반화된 가운데 GPS를 기반으로 하는 서비스들도 점차적으로 보편화되어 가고 있다. 이러한 변화에 따라 이동성을 지원하는 무선 단말기를 기반으로 한 모바일 GIS 환경에서의 위치 정보 활용은 크나큰 관심을 불러들이고 있으며, 또한 이러한 서비스를 효율적으로 제공하기 위해서 위치 기반 서비스(LBS: Location Based Service)의 기술 개발이 절대적으로 필요하게 되었다.(중략)

• Journal of Korea Spatial Information System Society
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• v.11 no.1
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• pp.177-182
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• 2009

Location Based Service(LBS) is various and widely spreading service based on the Location information. Those services are under the control of Privacy Act for Location Information to protect from misusing or overusing of personal location information. In this paper, we analyze a concept and a feature of personal location information and how to use and control the flow of location information by the Location Information Act. As the result of this paper, we expect to use the location information in various fields to develop more efficient service.

• The Magazine of the IEIE
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• v.29 no.12
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• pp.21-21
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• 2002

• The Magazine of the IEIE
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• v.29 no.12
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• pp.1425-1434
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• 2002

• Korea Information Processing Society Review
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• v.8 no.6
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• pp.4-6
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• 2001

• 한국공간정보시스템학회:학술대회논문집
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• 2002.11a
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• pp.1-21
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• 2002