• Title/Summary/Keyword: Location정보

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Design and Implementation of Social Network Service based on Location using Open API (Open API를 이용한 위치기반 소셜 네트워크 서비스의 설계 및 구현)

  • Lee, Don-Su;Kim, Eun-Hye;Park, Jong-Yeon;Lee, Sang-Jun
    • Proceedings of the Korean Information Science Society Conference
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    • 2011.06c
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    • pp.60-63
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    • 2011
  • 인터넷은 단순한 정보습득을 위한 공간을 넘어 사람들이 모여 교류하는 '소통의 장'으로서 역할을 하고 있다. 최근에는 타인과 끊임없이 대화를 나누고 소통하려는 인간의 기본 욕구를 반영한 서비스인 SNS(Social Network Service)가 전 세계의 주목을 받고 있다. 또한 LBS(Location-Based Service)는 GPS, Wi-Fi를 통한 위치정보를 활용하여 업무생산성 개선 및 다양한 생활 편의를 제공하는 서비스이다. 본 논문에서는 안드로이드 OS를 기반으로 LBS와 SNS를 통합한 어플리케이션을 제안한다. 개인용 모바일 정보기기인 스마트폰을 활용하여, 위치정보에 이용자 정보, SNS를 결합하여 서비스를 고도화 한다. 지인들의 위치를 기반으로 현재 상태, 트윗(Twit)을 통해 정보의 공유 및 활용을 극대화 할 수 있다. 이를 통해 사용자들이 적극적이고 용이하게 온라인 Identity를 표현하는 것을 목적으로 본 시스템을 제안한다.

A Location Acquisition using Dynamic Host Configuration Protocol to VoIP Emergency Service (VoIP 긴급통화 서비스에서 DHCP를 이용한 위치 획득)

  • Ji-Hun Chon;Mi-Hwa Kim;Jin-Hee Kim;Sun-Wan Choi;Shin-Gak Kang;Il-Jin Lee
    • Annual Conference of KIPS
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    • 2008.11a
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    • pp.1203-1206
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    • 2008
  • VoIP 서비스에서 긴급통화 서비스는 사용자 단말의 위치 정보(Location Information)와 사용자 식별번호를 긴급 호에 실어 긴급 대응 센터에 보내는 서비스이다. VoIP 긴급통화 서비스를 위하여 긴급 호발생 시 위치를 획득하여야 하며, 이를 위해 본 논문에서는 RFC 4776기반의 DHCP 옵션 확장하여 VoIP 단말의 위치 정보를 획득하는 방법을 구현하였다.

An Investigation of a Role of Affective factors in Users' Coping with Privacy Risk from Location-based Services (위치기반 서비스(Location-based Service)의 프라이버시 위험 대응에 있어 사용자 감정(Affect)의 역할)

  • Park, Jonghwa;Jung, Yoonhyuk
    • The Journal of Bigdata
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    • v.5 no.2
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    • pp.201-213
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    • 2020
  • Despite empirical research that the response to human risk is significantly influenced affective factors, the role of affective factors has been unexplored in information privacy research. This study aims to explore the privacy behaviors of location-based service (LBS) users from an affective point of view. Specifically, the study explored the relationship between three types of privacy threats (collection, hacking, secondary use), two affects (worry, anger), and a coping behavior (continuous use intentions). The structured survey was conducted with 552 users. In order to analyze the effect of the combination of perception of particular privacy threats and particular affects on the intention of continuous use, association rules, one of the data mining techniques, was employed. As a result, there was a difference in the intention to use according to the combination of the perception of risk and affect responses, and the most significant influence on the intention is when the second use of personal information was combined with anger. This study has significant theoretical contribution in that it includes affective factors in the research of information privacy users, complementing the biases of existing cognition-oriented approaches and providing a comprehensive understanding of privacy response behavior.

Enhancing Location Estimation and Reducing Computation using Adaptive Zone Based K-NNSS Algorithm

  • Song, Sung-Hak;Lee, Chang-Hoon;Park, Ju-Hyun;Koo, Kyo-Jun;Kim, Jong-Kook;Park, Jong-Sun
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.3 no.1
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    • pp.119-133
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    • 2009
  • The purpose of this research is to accurately estimate the location of a device using the received signal strength indicator (RSSI) of IEEE 802.11 WLAN for location tracking in indoor environments. For the location estimation method, we adopted the calibration model. By applying the Adaptive Zone Based K-NNSS (AZ-NNSS) algorithm, which considers the velocity of devices, this paper presents a 9% improvement of accuracy compared to the existing K-NNSS-based research, with 37% of the K-NNSS computation load. The accuracy is further enhanced by using a Kalman filter; the improvement was about 24%. This research also shows the level of accuracy that can be achieved by replacing a subset of the calibration data with values computed by a numerical equation, and suggests a reasonable number of calibration points. In addition, we use both the mean error distance (MED) and hit ratio to evaluate the accuracy of location estimation, while avoiding a biased comparison.

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Geohashed Spatial Index Method for a Location-Aware WBAN Data Monitoring System Based on NoSQL

  • Li, Yan;Kim, Dongho;Shin, Byeong-Seok
    • Journal of Information Processing Systems
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    • v.12 no.2
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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.

Indoor Passive Location Tracking and Activity Monitoring using WSN for Ubiquitous Healthcare

  • Singh, Vinay Kumar;Lee, Seung-Chul;Lim, Hyo-Taek;Myllyla, Risto;Chung, Wan-Young
    • Journal of information and communication convergence engineering
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    • v.5 no.4
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    • pp.382-388
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    • 2007
  • Indoor location system using wireless sensor network technology was applied for the status evaluation and activity monitoring of elderly person or chronic invalid at home. Location awareness application is transparent to the daily activities, while providing the embedded computing infrastructure with an awareness of what is happening in this space. To locate an object, the active ceiling-mounted reference beacons were placed throughout the building. Reference beacons periodically publish location information on RF and ultrasonic signals to allow application running on mobile or static nodes to study and determine their physical location. Once object-carried passive listener receives the information, it subsequently determines it's location from reference beacons. By using only the sensor nodes without any external network infrastructure the cost of the system was reduced while the accuracy in our experiments. was fairly good and fine grained between 7 and 15 cm for location awareness in indoor environments. Passive architecture used here provides the security of the user privacy while at the server the privacy was secured by providing the authentication using Geopriv approach. This information from sensor nodes is further forwarded to base station where further computation is performed to determine the current position of object and several applications are enabled for context awareness.

Radial Reference Map-Based Location Fingerprinting Technique

  • Cho, Kyoung-Woo;Chang, Eun-Young;Oh, Chang-Heon
    • Journal of information and communication convergence engineering
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    • v.14 no.4
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    • pp.207-214
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    • 2016
  • In this paper, we propose a radial reference map-based location fingerprinting technique with constant spacing from an access point (AP) to all reference points by considering the minimum dynamic range of the received signal strength indicator (RSSI) obtained through an experiment conducted in an indoor environment. Because the minimum dynamic range, 12 dBm, of the RSSI appeared every 20 cm during the training stage, a cell spacing of 80 cm was applied. Furthermore, by considering the minimum dynamic range of an RSSI in the location estimation stage, when an RSSI exceeding the cumulative average by ${\pm}6dBm$ was received, a previously estimated location was provided. We also compared the location estimation accuracy of the proposed method with that of a conventional fingerprinting technique that uses a grid reference map, and found that the average location estimation accuracy of the conventional method was 21.8%, whereas that of the proposed technique was 90.9%.

Development of Location Based System using Indoor Lenticular Sticker (실내 렌티큘러 스티커를 이용한 위치기반 시스템 개발)

  • Jeong, Seung-Hyuk
    • The Journal of the Korea institute of electronic communication sciences
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    • v.14 no.3
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    • pp.601-606
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    • 2019
  • The lenticular Location Based System is related to a location information technology. The system enables users to inform their location in real time wherever in a room, a building, a ship, a basement. In this paper, we analyze limitations and problems of the existing indoor Positioning System and propose a method of user-oriented location service. The proposed method consists of a lenticular sticker, a database(DB) acquisition and analysis technology. The proposed system can be used as an infrastructure to implement various indoor location-based services. In addition to improve user centered positioning accuracy through the development of location-based systems using indoor lenticular systems, it can be used in a disaster situation.

Region and Movement Based Adaptive Location Management for Wire/Wireless Convergent Networks based-on Cognitive Networking (인지 네트워킹기반 유무선 융합망에서의 영역과 이동 임계치를 기반으로 한 적응형 이동성 관리)

  • Kwon, Eun-Mi;Kim, Jeong-Ho
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.49 no.6
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    • pp.77-82
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    • 2012
  • In this paper, the new location management scheme based on region and movement threshold has been proposed in order to minimize the required cost to handle the resource location management signaling traffics under the wire/wireless convergent networks when the users are moving around the cold and hot regions. In this scheme, the sequential paging is supposed to be performed according to the movement threshold which can be changed in accordance with the number of movements that each mobile user had made while it is moving around the resource regions. With the proposed scheme, the cost of managing the location management traffics and efficient spectrum assignment overhead can be minimized by placing signaling traffics for location managements and also allocating radio spectrum considering individual movement behaviors.

Comparative Analysis of TOA and TDOA method for position estimation of mobile station (이동국 위치 추정을 위한 TOA와 TDOA방법의 비교 분석)

  • 윤현성;이창호;변건식
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.4 no.3
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    • pp.595-602
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    • 2000
  • This paper is aimed at developing an location tracking system of mobile station based on currently available mobile communication network or mobile Phone and PCS(Personal Communication System). When the location tracking of mobile stations is in services, Emergency-119, all of crime investigation, effective urban traffic management and the safety protection of Alzheimer's patients can be available. In order to track the location of the mobile and base station, assumption in this paper is to use the statistic characteristics of LOS when modeling the standard noise in case that radio path is LNOS environment. The standard variation of the standard noise is $\pm150$. First, location is estimated by the positioning algorithms of TOA and TDOA and compared each other. Second, after canceling the standard noise by Kalman filter, location is estimated by the above two positioning algorithms. Finally, the location by the Kalman filter and two positioning algorithms is estimated by smoothing method. As a result, 2 dimensional average location error is imvoved by 51.2m in TOA and 34.8m in TDOA when Kalman filer and two positioning algorithms are used, compared with the two positioning algorithm used. And there is 3 more meter improvement after smoothing than Kalman filer and two positioning algorithms used.

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