• 한국컴퓨터정보학회논문지
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• 제20권2호
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• pp.89-97
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• 2015

본 논문에서는 이동 클라우딩 환경에서 LBS(Location Based Services)를 지원하는 핸드오프 기법을 제안한다. 이동 클라우딩 컴퓨팅은 핸드오프 지연과 함께 재인증 지연이 발생한다. 단말이 새로운 AP에 도착하면 클라우드 서버로부터 다시 인증을 받는 절차가 필요하다. 하지만 위치정보를 이동 단말의 재인증에 사용하면 인증에 따른 지연시간을 감축시킬 수 있다. 이를 위해 제안하는 기법은 위성신호를 받지 못하는 실내에서 사용할 수 없는 GPS기반 기술을 보완할 수 있는 WiFi 기반의 위치정보 서버에 AP의 위치정보를 구축하고 핸드오프 수행 시에 위치정보를 수집하도록 하였다. 또한 핸드오프 시에 위치정보 요청을 분리하여 처리하도록 하여 핸드오프지연 시간의 증가 없이 LBS 처리를 가능하도록 하였다. 성능 분석은 핸드오프 지연시간과 위치정보 처리시간과 이에 따라 발생하는 데이터의 양을 기존의 클라우드 환경에서의 핸드오프 기법과 비교 분석하였다. 제안한 기법은 핸드오프 시에 위치정보 서버를 통해 위치정보를 수신하도록 하여 LBS 처리에 따른 지연시간이 낮았으며 핸드오프 수행시간이 증가하지 않는 것을 확인하였다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.854-859
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• 2002

Location Based Services, or LBS refers to value-added service by processing information utilizing mobile user location. With the rapidly increasing wireless internet subscribers and world LBS market, the various location based applications are introduced such as buddy finder, proximity and security services. As the killer application of the wireless internet, the LBS has preconsidered technology about location determination technology, LBS middleware server for various application, and diverse contents processing technology. This paper describes the open architecture for LBS platform ensuring interoperability among the wireless networks and various location-based application services and the functional requirements for the LBS platform. The LBS platform in a narrow sense provides a standard interfaces for location management and network management for location services as follows, positioning (location acquisition through network or/and handset), location managing, location based functions, profile management, authentication and security, location based billing, information roaming between carriers and the system monitoring independent to specific network or ISP/CPs(Content Providers).

• 정보처리학회논문지C
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• 제13C권4호
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• pp.415-426
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• 2006

유비쿼터스의 주요한 특성은 상황 인식(Context-Awareness)이며 이것은 시공간에 따라 변하는 사용자 데이터를 직접 입력 하지 않고 상황에 맞게 자동적으로 처리해 주는 것을 뜻한다. 그러나 Context Aware 환경에서 위치정보는 사용자의 명확한 동의 없이 수집될 수 있기 때문에 사용자는 자신의 위치정보에 대한 완전한 제어를 할 수 없다. 이러한 문제로 인해 사용자 위치정보 접근시 Privacy Issue가 발생할 수 있다. 여기서, 시간이나 장소, 사용자의 상황, 정보를 요구하는 사람 등 다양한 조건에 따라 위치정보의 공개를 결정하는 프라이버시를 고려한 위치정보 시스템의 구축은 매우 중요하다. 따라서 본 논문에서는 위치정보의 유출을 차단하고 안전하게 위치기반 서비스를 제공하기 위해 기존의 LBS에 고객의 상황에 민감하게 반응할 수 있도록 CS-RBAC을 기반으로 새로운 시스템을 제안하였다. 아울러 사용자의 Preference를 적극적으로 반영 할 수 있는 PCP의 장점도 그대로 수용하였다. 또한 Privacy Weight라는 새로운 개념을 통하여 정보공개의 가부만을 결정하는게 아니라 위치정 보에 Grade를 부여하도록 하였다. 이러한 방법으로 Context-Aware 환경에서 Role에 기반하여 사용자의 위치정보를 안전하게 보호할 수 있다.

• 한국항해항만학회지
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• 제43권5호
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• pp.281-288
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• 2019

In this paper, we implemented a mobile application of location-based augmented reality that combines self-sensing technology and various safety information using technological advancements of the smartphone. Vessel navigation is a suitable area for augmented reality because it requires accurate knowledge of the distance and location of destinations, danger zones, AtoN, and adjacent vessels. Current smartphone applications only provide 2D images and location information. Such applications do not include information about the surrounding environment, and as a result, they can only function using their own sensing information and surrounding information into a location-based augmented reality. If you provide a variety of sensor information embedded in the smartphone to 'BadaGO', the implemented application through this study, 'BadaGO' can provide safe navigation information to the user device in real time with a variety of its own formed information. The user has a high practicality and applicability of a small ship that is supplied with safe navigation information in a changing marine environment only by providing information through the application on the smartphone.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2006년도 춘계학술발표회 논문집
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• pp.111-118
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• 2006

The LBS (Location Based Service) location information is the element which is important decides the application of form service, Recently the location accuracy with the method which applies the wireless Internet DGPS improved inside 1 meter Like this. application of the LBS which corresponds In the location accuracy which Improves accurate the Location Information output system development which is accurate stands is essential. In this study which it sees it used 1:5000 digital map MS visual 6.0 Active X controls of the country geography intelligence Personnel and it developed the location information output module of web browser base. The location information output system which is developed it will be able to secure the convenient characteristic of precision and visual program of the digital map simultaneously and the maximum anger of LBS application is expected.

• 한국통신학회논문지
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• 제31권9B호
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• pp.848-856
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• 2006

가입자의 위치정보를 기반으로 다양한 서비스를 제공하는 위치기반서비스(Location Based Service, LBS)는 구난신호 등의 공익적인 활용을 포함한 이용 활성화와 위치정보라는 개인정보에 대한 보호 강화의 측면에서 많은 관심을 받아왔다. 본 연구에서는 LBS 서비스의 비즈니스 모델을 위치정보흐름을 중심으로 구분하여 제시하고자 한다. 또한 비즈니스 모델 세부 유형별로 위치정보의 보호에 관련된 관점에서 검토를 한다. 마지막으로 LBS 서비스 비즈니스 모델의 성공을 위하여 필요한 LBS 서비스별 정보보호 문제 해결을 위한 고려사항에 대해 정리한다.

• International Journal of Computer Science & Network Security
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• 제21권12spc호
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• pp.399-408
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• 2021

Information security reports four types of basic attacks on information. One of the attacks is named as fabrication. Even though mobile devices and applications are showing its maturity in terms of performance, security and ubiquity, location-based applications still faces challenges of quality of service, privacy, integrity, authentication among mobile devices and hence mobile users associated with the devices. There is always a continued fear as how location information of users or IoT appliances is used by third party LB Service providers. Even adversary or malicious attackers get hold of location information in transit or fraudulently hold this information. In this paper, location information fabrication scenarios are presented after knowing basic model of information attacks. Peer-to-Peer broadcast model of location privacy is proposed. This document contains introduction to fabrication, solutions to such threats, management of fabrication mitigation in collaborative or peer to peer location privacy and its cost analysis. There are various infrastructure components in Location Based Services such as Governance Server, Point of interest POI repository, POI service, End users, Intruders etc. Various algorithms are presented and analyzed for fabrication management, integrity, and authentication. Moreover, anti-fabrication mechanism is devised in the presence of trust. Over cost analysis is done for anti-fabrication management due to nature of various cryptographic combinations.

• Journal of Communications and Networks
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• 제3권4호
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• pp.351-360
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• 2001

This paper introduces an approach for providing Location Based Services (LBS) using Spatial Location (SLO) information within the Session Initiation Protocol (SIP). The aim of the paper is to set up the framework for providing LBS services in devices connected to wire and wireless IP networks. This method uses SIP as transport and the SLO as data formal inserted in the SIP pay-load. It analyses the relationship among the network elements involved in the architecture, and its functionality fur providing access to network services regardless of the user location. In conclusion, this proposal enables SIP to support location-related services such as messaging, location-based commerce, and any location-based computing. Furthermore, it describes the advantage of adding the user location information network resources optimization in mobile environments and future networks.

• Journal of the Korean Data and Information Science Society
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• 제18권3호
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• pp.757-766
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• 2007

Location services are used in mobile ad hoc and hybrid networks to locate either the geographic position of a given node in the network or a data item. One of the main usages of position location services is presented in location based routing algorithms. In particular, geographic routing protocols can route messages more efficiently to their destinations based on the destination node's geographic position, which is provided by a location service. In this paper, we propose an adaptive location service on the basis of fuzzy logic called FHLS (Fuzzy Hierarchical Location Service) for mobile ad hoc networks. The adaptive location update scheme using the fuzzy logic on the basis of the mobility and the call preference of mobile nodes is used by the FHLS. The performance of the FHLS is to be evaluated by a simulation, and compared with that of existing HLS scheme.

• 한국정보기술응용학회:학술대회논문집
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• 한국정보기술응용학회 2005년도 6th 2005 International Conference on Computers, Communications and System
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• pp.81-84
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• 2005

Various design schemes for network using wireless sensor nodes have been widely studied on the several application areas ranging from the real world information collection to environmental monitor. Currently, the schemes are focused on the design of sensor network for low power consumption, power-aware routing protocol, micro miniature operating system and sensor network middleware. The indoor localization system that identifies the location of the distributed nodes in a wireless sensor network requires features dealing with mobility, plurality and other environmental constraints of a sensor node. In this paper, we present an efficient location system to cope with mobility of multiple mobile nodes by designing a location handler that processes location information selectively depending on the nodes' density in a specific region. In order to resolve plurality of multiple mobile nodes, a routing method for the location system is also proposed to avoid the occurrence of overlapped location data.