• Electronics and Telecommunications Trends
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• v.22 no.3 s.105
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• pp.12-19
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• 2007

현재 위치에서 목적지까지의 거리와 교통상황을 고려하여 최적의 경로를 안내하는 도로 및 교통 정보 제공 시스템인 차량용 내비게이션 시스템은 텔레매틱스의 가장 중요한 응용 분야이며 디지털 컨버전스의 핵심으로 부각되고 있다. 내비게이션 기술은 크게 2차원 또는 3차원 그래픽 기반 기술과 위성 영상이나 비디오 또는 실시간 영상에 기반을 둔 영상 기반 내비게이션 기술로 구분할 수 있으며, 최근에는 운전자의 시야에 보이는 실제의 도로의 모습을 카메라를 통해 실시간으로 취득한 후 경로 안내 정보를 부가하여 보여줄 수 있도록 하는 증강현실 기반의 실감 내비게이션이 차세대 기술로 연구되고 있다. 본 고에서는 이러한 실감 내비게이션 기술을 중심으로 국내외 기술개발현황과 한국전자통신연구원에서의 기술 개발 사례에 대하여 자세히 살펴보고 향후의발전 방향에 대해 전망해 본다.

• Journal of Korean Society of Transportation
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• v.27 no.2
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• pp.73-82
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• 2009

Location-based concierge services (LBCS) are considered to be one of the main service functions provided in a city in ubiquitous technology spaces. A "Ubiquitous City" is defined as a city in which both public and private services can be delivered and received anywhere and anytime. One of the key elements that make location-based concierge services successful is the interoperability of location data. Currently, several existing technologies could provide LBCS including car navigation services and ubiquitous computing. However, lack of standardized structure for location data makes it impossible for heterogeneous technologies to be able to deliver uniform LBCS. The purpose of this paper is to develop standardized locational data structure so that heterogeneous technologies could provide efficient LBCS to all users of the various transportation modes.

• Journal of Korean Society of Transportation
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• v.24 no.7 s.93
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• pp.65-79
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• 2006

The ATIS(Advance Traveler Information System), as one part of ITS, is a system aiming to disperse traffic volume on transportation networks by providing traffic information to transportation users on pre-trip and en-route trips. One of tools in ATIS is usage of VMS(Variable Message Signs). It provides to the drivers with direct information about state of processing direction. which is considered as the most effective method in ATIS. The purposes of providing VMS information are classified two categories. One is to provide simple information to drivers for their convenience. The other is to manage traffic demand to improve transportation network performance. However, for more effective and reliable VMS information, several strategies should be taken into account. The main VMS management strategy is "Traffic Diversion Strategy for minimum delay" when traffic congestion or incident are occurred. For effective operation. firstly. reasonable diversion traffic volume is determined by network traffic condition Secondly, it is necessary to make providing information strategy which reflects driver response behavior for controling diversion traffic volume. This paper focuses on the providing real-time route guidance information by VMS when congestion is occurred by the incidents. This sturdy estimates time-dependent system optimal diversion rate that inflects travel time and queue lengths using traffic flow simulation model on base Cellular Automata. In addition, route choice behavior models are developed using binary logit model for traffic information variable by traffic system controller. Finally, this study provides time-dependent VMS massage contents and degree of providing information in order to optimize the traffic flow.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10a
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• pp.187-189
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• 2001

이동 컴퓨팅(Mobile Computing)의 상업적인 응용분야로서, 지능형 교통정보시스템(ITS)에서의 첨단 여행자 정보시스템(ATIS)이 있다. ATIS에서 가장 중요한 이동 컴퓨팅 태스크는 현재 위치에서 목적지까지의 최단 경로를 계산하는 일이다. 본 논문에서는 최단 경로 재 계산 문제에 대해서 연구하였다. 이 문제는 전자 수치 지도(topological digital road map)상의 간선(edge) 비용이 동적인 교통 상태에 따라 빈번하게 갱신되고 있는 ATIS의 동적 경로 안내 시스템(URGS)에서 발생한다. 지금까지 제안된 방법들은 처음부터 최단 경로를 재계산하거나, 또는 단지 비용의 변화가 일어난 간건 상에 있는 양 끝 노드 사이에 대해서 최단 경로를 재계산할 뿐이다. 본 논문에서는 앞서 계산된 최단 경로에 대한 정보를 이용하는 효율적인 적응형 슬라이딩 윈도우 기반의 근접 최단 경로 재 계산 방법을 제안한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.5
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• pp.988-995
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• 2009

One of the most popular services of Telematics is a shortest path finding from a starting point to a destination. In this paper, a dynamic shortest path finding system with forecasting result of traffic flow in the future was developed and various experiments to verify the performance of our system using real-time traffic information has been conducted. Traffic forecasting has been done by a prediction system using Bayesian network. It searched a dynamic shortest path, a static shortest path and an accumulated shortest path for the same starting point and destination and calculated their travel time to compare with one of its real shortest path. From the experiment, over 75%, the travel time of dynamic shortest paths is the closest to one of their real shortest paths than one of static shortest paths and accumulated shortest paths. Therefore, it is proved that finding a dynamic shortest path by applying traffic flows in the future for intermediated intersections can give more accurate traffic information and improve the quality of services of Telematics than finding a static shortest path applying by traffic flows of the starting time for intermediated intersections.

• ICROS
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• v.2 no.2
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• pp.66-70
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• 1996

현재 차량 항법 장치는 최근 급속하게 발달한 전자기술을 활용하여 단순한 차량의 자유이동 기능에서 운전자에게 안전성, 효율성, 편의성, 가격 등을 보장할 뿐만 아니라 운전자에게 경로를 안내하거나 교통 정보를 제공하는 정보 제공 장치로 도약하고 있다. 그러나 앞으로 이같은 단순 정보 전달 기능을 초월하여 보다 효율적이고 안전한 운행이 가능한 지능적인 기능을 수행케 될 것이다. 즉, 도로상의 센서와 같은 교통 정보 수집체계와 통신체계 등을 활용하여 실시간 교통 상황 정보를 제공하여 쾌적한 추행환경 및 차량 제어 시스템과 연계하여 안전주행에 기여할 수 있다.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1046-1047
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• 2008

실시간 대중교통 종합 환승정보(TAGO)시스템은 대중교통 이용자 중심의 서비스제공을 목적으로 교통 수단간 환승 정보를 제공하고 있다. TAGO는 항공, 철도, 버스(시외/시내/고속), 지하철 등 대중교통 뿐 아니라 자가용, 자전거 이용자의 환승을 고려한 정적/동적 운행정보, 소통 정보를 연계하여 통합하고, 네비게이션 서비스, 지역정보 서비스, 돌발 상황, 날씨 정보, 통계 정보를 인터넷 TAGO 홈페이지(www.tago.go,kr)와 환승 지점에서의 현장안내장비(Kiosk, PDP)를 통해 제공하고 있다. 현재 TAGO는 3차 사업이 진행 중이며 전국 단위 장거리 교통수단과 지역내 단거리 교통수단의 교통정보를 연계하여 효율적인 환승정보를 제공하여 대중교통 이용 활성화에 기여하고 있다. 미래의 TAGO 시스템은 유비쿼터스 시대의 신개념 교통정보 제공을 위한 확장성을 고려하여 서비스 범위를 확대하며, 다양한 매체를 통해 전국 어느곳에서든 출발지부터 목적지까지 교통수단의 선택, 경로안내, 환승정보, 지역정보 등을 제공할 계획이다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.11 no.5
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• pp.46-55
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• 2012

This study proposes an estimate method of willingness to pay(WTP) for real-time route guidance systems using contingent valuation method(CVM) under double bounded dichotomous choice question(DBDCQ) and analysis for impact factors of WTP estimation. This study assumed that provided real-time traffic information service is optimal route concepts dealing with traffic conditions on origin-destination. Analysis targets were classified into two groups as short distance path and middle distance path for estimating WTP for realtime route guidance system in a year using the survival analysis method and the regression model with personal information, actual condition and satisfaction of information usage and users' awareness and usage of facilities. As a result, mean WTP of realtime route guidance system is 4,034won/year in short distance path, and 4,884won/year in middle distance path. Therefore real-time route guidance system for longer distance path is recognized as more valuable than shorter distance path. Moreover, the necessity of information was required on a higher income group and higher WTP was estimated on owners of vehicle group and lower awareness of a route group.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.18 no.1
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• pp.43-55
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• 2019

Smart phone based navigation applications are very useful in everyday life. Cost-effective and user friendly navigation can be provided to the user by many applications available in market. Using the Smart phone these navigation applications provide accurate navigation for outdoor locations. But providing an accurate navigation underground space such as subway station is still a challenge. It is hence more convenient and appropriate for mobility services if the visitors could simply view the guidance of the subway station on their mobile phone, wherever and whenever it is needed. This study develops a algorithm for indoor navigation with the help of Augmented Reality(AR) and QR marker code from the entrance to the train platform for users. This indoor navigation uses AR and QR maker codes for two purposes: to provide the user link to the subway station location and to provide the current guidance details to the user. This Smart phone algorithm that uses a smart phone optical tool to decode the QR marker to determine the location information and provide guidance to the AR without indoor Maps. This algorithm also provides a module to guide mobility vulnerable to the Barrier Free route to destination.

• Journal of Korean Society for Geospatial Information Science
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• v.10 no.1 s.19
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• pp.59-66
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• 2002

The rapid change of industrial structure causes to increase distribution cost and requires necessity of physical distribution system urgently. Traffic situation is getting extremely worse and traffic jam has led to increasing expense of physical distribution delivery which dominates 20% of distribution cost. In this situation, the shortest and most suitable path search system is required by modern people who must waste a lot of time for moving with a car or on the street as well as many companies. for these reasons, we developed the shortest-path-searching system applying the dijkstra algorithm which is one of the effective shortest path algorithm to GIS, and it was constructed by considering realistic urban traffic and the pattern of street in a physical situation. Also, this system was developed to be updated weight data automatically, considering the dynamic change of traffic situation such as a traffic information service which will be served in real time. Finally, we designed this system to serve on web by using MapObjects IMS.