• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.276-279
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• 2004

The location-based service is one of the most powerful services in the mobile area. The location-based service provides information service for moving user's location information and information service using wire / wireless communication. In this paper, we propose a model for personalized recommendation system which includes location information and personalized recommendation system for location-based service. For this service system, we consider mobile clients that have a limited resource and low bandwidth. Because it is difficult to input the words at mobile device, we must deliberate it when we design the interface of system. We design and implement the personalized recommendation system for location-based services(advertisement, discount news, and event information) that support user's needs and location information. As a result, it can be used to design the other location-based service systems related to user's location information in mobile environment. In this case, we need to establish formal definition of moving objects and their temporal pattern.

• 한국공간정보시스템학회 논문지
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• 제10권2호
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• pp.49-62
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• 2008

본 논문은 영상인식 기반의 위치기반서비스를 위한 실내위치인식 시스템을 제안한다. 제안한 시스템은 실내 환경에 적용 가능한 비젼 기반의 위치 인식 시스템으로 위치 인식 결과를 사용자의 시야에 자연스럽게 중첩함으로써 증강 현실을 구현한다. 제안한 방법은 기존의 위치인식 방법과 달리 부가적 인 위치 인식 하드웨어 사용없이 컴퓨터 비젼 기술을 이용한 위치 인식 방법이다. 이를 위해 사용자에 의해 착용된 모바일 PC와 함께 카메라를 통해 영상을 입력하고, 입력된 영상에서 패턴매칭과 위치모델을 참조하여 사용자의 위치를 판별한다. 제안한 시스템은 이미지 시퀀스 매칭 방법과 마크 검출을 통해 위치를 추정하고, 사전에 정의한 위치모델을 사용함으로써 최종 위치를 인식한다. 제안한 시스템은 마크 검출을 위해 적응적 암계치 방법을 제안하고, 위치 판별을 위해 위치모델을 사용함으로써 보다 정확하고 효율적인 위치 인식 결과를 얻을 수 있다. 실내 환경의 위치 인식을 위해 제안한 시스템을 적용한 결과, 실내 환경에 대해 익숙지 않은 사용자들에게 효과적으로 위치인식 서비스에 적용할 수 있다.

• 한국컴퓨터정보학회논문지
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• 제21권6호
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• pp.63-69
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• 2016

In this paper, we proposed the location tracking system based on MS-Based/Assisted(Mobile Station-Based and Assisted) location trigger service model with context-awareness for the intelligent location tracking of moving objects. It provides the proper resulting value that matches the context of users through the analysis about the situation of the user, physical environment, computing resource and the existing information on user input. In order to provide real-time data, we proposed the location tracking system which realizes the intelligent information such as the expecting arrival time and passing the specific area of the moving object by adopting the location trigger. So, it derives to minimize the costs of communication for the mobile object tracking applications. The proposed location tracking system based on context-awareness can be used for realtime monitoring, intelligent alarm/action, setting up of the optimized moving path, dynamic adjustment of strategies and policies. So it has the advantage to develop the application system which is aimed at optimization of the object tracking and movement.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2003년도 Proceeding
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• pp.113-117
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• 2003

As the wireless communication technology advances rapidly, a personalization technology can be incorporated with the mobile Internet environment, which is based on location-based services to support more accurate personalized services. A location-based personalized recommender system is one of the essential technologies of the location-based application services, and is also a crucial technology for the ubiquitous environment. In this paper we propose a framework of a location-based personalized recommender system for the mobile Internet environment. The proposed system consists of three modules the interface module, the neighbor selection module and the prediction and recommendation module. The proposed system incorporates the concept of the recommendation system in the Electronic Commerce along with that of the mobile devices for possible expansion of services on the mobile devices. Finally a service scenario for entertainment recommendation based on the proposed recommender system is described.

• Journal of Information Processing Systems
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• 제12권2호
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• pp.263-274
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• 2016

The exceptional development of electronic device technology, the miniaturization of mobile devices, and the development of telecommunication technology has made it possible to monitor human biometric data anywhere and anytime by using different types of wearable or embedded sensors. In daily life, mobile devices can collect wireless body area network (WBAN) data, and the co-collected location data is also important for disease analysis. In order to efficiently analyze WBAN data, including location information and support medical analysis services, we propose a geohash-based spatial index method for a location-aware WBAN data monitoring system on the NoSQL database system, which uses an R-tree-based global tree to organize the real-time location data of a patient and a B-tree-based local tree to manage historical data. This type of spatial index method is a support cloud-based location-aware WBAN data monitoring system. In order to evaluate the proposed method, we built a system that can support a JavaScript Object Notation (JSON) and Binary JSON (BSON) document data on mobile gateway devices. The proposed spatial index method can efficiently process location-based queries for medical signal monitoring. In order to evaluate our index method, we simulated a small system on MongoDB with our proposed index method, which is a document-based NoSQL database system, and evaluated its performance.

• 제어로봇시스템학회논문지
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• 제16권1호
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• pp.83-89
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• 2010

If an appliance perceives the location or health condition of a resident in the smart home, it can provide more intelligent service actively. That is, while the conventional appliance is operated by manual input of a resident, the location-based human adaptive appliance detects the resident's information such as location, activity pattern, or health condition by itself and provides the most suitable living condition for the resident autonomously. This paper presents the real-time location-based metabolic rate estimation method that measures the amount of physical activity (metabolic rate) for location-based human adaptive air-conditioner. And, the feasibility of the algorithm is evaluated experimentally on a test bed using the pyroelectric infrared sensor-based indoor location aware system (PILAS) that is a non-terminal-based location-aware system.

• 한국컴퓨터정보학회논문지
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• 제24권10호
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• pp.149-157
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• 2019

본 논문은 지능형 위치추적을 위한 위치트리거와 이동에이전트 시스템 기술을 적용하여, 상황인식 기반 위치서비스를 위한 위치트리거 시스템을 설계 및 구현한다. 또한, 트리거 및 조치 서비스 프로토콜 구현과 능동규칙 탑재 이동에이전트에 대한 실험을 통하여, 제안 시스템이 상황인식 기반 위치서비스의 특성에 따른 시스템 최적화 및 위치 기반 서비스 응용들에 대한 확장성과 유효성이 있음을 검증한다. 제안 시스템은 전력 사용자의 소비 패턴 및 행위 변화에 대한 시스템의 능동적 특성을 통한 자원 활용의 최적화 시스템 구축을 위한 예비 연구로써, 객체 위치 기반의 지능적 경고와 조치를 통한 환경 및 자원 활용 최적화와 다양한 위치서비스 응용 시스템 구축에 효과적으로 적용할 수 있다.

• 한국IT서비스학회지
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• 제10권4호
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• pp.243-258
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• 2011

With increasing interest in ubiquitous computing technology, an infrastructure for the short-distance wireless communication has been extended socially, bringing spotlight to the security system using the image or location. In case of existing security system, there have been issues such as the occurrences of blind spots, difficulty in recognizing multiple objects and storing of the unspecified objects. In order to solve this issue, zone-based location-estimation search system for the image have been suggested as an alternative based on the real-time location determination technology combined with image. This paper intends to suggest the search service for the image zone-based location-estimation. For this, it proposed the location determination algorism using IEEE 802.15.4/ZigBee's RSSI and for real-time image service, the RTP/RTCP protocol was applied. In order to combine the location and image, at the event of the entry of the specified target, the record of the time for image and the time of occurrence of the event on a global time standard, it has devised a time stamp, applying XML based meta data formation method based on the media's feature data based in connection with the location based data for the events of the object. Using the proposed meta data, the service mode which can search for the image from the point in time when the entry of the specified target was proposed.

• 한국항행학회논문지
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• 제12권1호
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• pp.15-21
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• 2008

본 논문에서는 관리대상자의 위치 및 기타 관련 정보를 위치관리시스템(LMS : Location Management System)에서 항시 감시 및 관리할 수 있는 GPS 기반 위치 인식 단말시스템 및 위치관리시스템을 구현하였다. 구현한 시스템은 PID(Personal Identification Device)의 정보를 전송하기 위한 모듈과 GPS 기반의 위치정보 수집 모듈로 구성된 위치 인식 단말장치 (Mobile HTE : Mobile Home Terminal Equipment)와 Mobile HTE에서 수신된 정보를 인터넷 망을 통하여 위치관리시스템에 전송할 수 있는 단말장치 (HTE : Home Terminal Equipment)를 구현하여 관리대상자의 위치를 관리할 수 있는 위치관리시스템을 설계 하였다.

• Journal of applied mathematics & informatics
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• 제27권3_4호
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• pp.703-714
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• 2009

GPS is especially suitable for location systems in flat areas, but the availability of GPS is limited in highly urbanized and mountain areas, due to the nature of satellite communications. Dead reckoning is generally used to solve a location problem when a pedestrian is out of range of GPS coverage. To extend the apparent coverage of the GPS system for a hiker in mountain areas, we propose an integrated 3D location system that interpolates a 3D dead reckoning system based on information about contour lines. The speeds of hikers vary according to the inclination of the ground in sloped areas such as mountains. To reduce location measurement errors, we determine the angle of inclination based on the contour lines of the mountain, and use the speeds based on the inclination in the location system. The simulation results show that the proposed system is more accurate than the existing location system.