• Journal of information and communication convergence engineering
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• 제8권5호
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• pp.554-559
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• 2010

Recently, various in-vehicle networks have been developed respectively in order to accomplish their own purpose such as CAN and MOST. Various electronic devices for vehicle are controllable by the advent of networks attached to the vehicle. However, the networks also come with a variety of unique features in each network-specific communication which creates difficulty using and supporting the interoperable services among the networks. To solve this problem, each network needs a standard integration framework. In this paper, a framework is proposed and implemented. It consists of a standard protocol using XML to improve compatibility and portability. The framework makes each network interoperable by applying unique information and messages of the network in the XML standard document. The results obtained by implementation show that the framework supports the efficient communication of data between heterogeneous invehicle networks.

• 디지털산업정보학회논문지
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• 제14권1호
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• pp.15-25
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• 2018

ISO/IEC 15118 is a standard for communications and services for electric vehicle charging infrastructure. Although this standard deals only with data communication between an electric vehicle and a charge station, communication with the outside is essential for establishing an authentication system for vehicle certification and V2G service for electric power transmission. In this study, it was designed to verify the information of electric car charging infrastructure in electric power system through communication link between ISO/IEC 15118 electric vehicle model and IEC 61850 standard MMS protocol. This is demonstrated in the field so that the electric vehicle communication data is linked with the micro grid management system. This could be used as an element technology in other distributed power sources as well as electric cars in the future.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 추계학술대회논문집
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• pp.49-52
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• 2004

High-speed trains with the maximum speed of 300 km/h have started revenue services since April 2004. A large portion of the 'Kyung-Bu' line is comprised of tunnels or bridges, which may cause excessive noise in a vehicle. The vibration generated by the trains propagates into the structure of the tunnel and the vehicle and it can be radiated as noise inside the vehicle interior. This noise can usually be heard as low frequency structure-borne noise. Measurement of the noise and vibration inside the KTX vehicle confirmed that the noise comprises of frequencies below 250 Hz with a couple of broad peaks.

• ETRI Journal
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• 제45권6호
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• pp.1065-1078
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• 2023

In vehicular networks, diverse safety information can be shared among vehicles through internet connections. In vehicle-to-internet communications, vehicles on the road are wirelessly connected to different cloud networks, thereby accelerating safety information exchange. Onboard sensors acquire traffic-related information, and reliable intermediate nodes and network services, such as navigational facilities, allow to transmit safety information to distant target vehicles and stations. Using vehicle-to-network communications, we minimize delays and achieve high accuracy through consistent connectivity links. Our proposed approach uses intermediate nodes with two-hop separation to forward information. Target vehicle detection and routing of safety information are performed using machine learning algorithms. Compared with existing vehicle-to-internet solutions, our approach provides substantial improvements by reducing latency, packet drop, and overhead.

• 대한토목학회논문집
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• 제41권5호
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• pp.581-589
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• 2021

최근 국내 초소형전기차 도입이 증가하면서, 관련 시장 활성화를 위한 초소형전기차 사용자만족도에 대한 관심이 증가하고 있다. 본 논문에서는 사용자만족도 구성요인을 기반으로 초소형전기차를 활용한 공공서비스 개발에 관한 기초연구를 수행하였다. 설문조사는 ① '초소형전기차 사용자만족도 구성요인 우선순위 선정을 위한 계층화(AHP) 분석'과, ② 초소형전기차에 대한 사용자들의 선호도 및 교통서비스 제공을 위한 사전 자료수집을 위한 '초소형전기차 이미지 설문조사', ③ 실제 초소형전기차를 운행한 이용자의 사용자만족도를 조사하기 위해 '초소형전기차 운전자 사용자만족도 설문조사' 순서로 수행하였다. 계층화(AHP) 분석에서는 '사용자 이용 데이터', '차량 이동 데이터', '충전서비스 데이터'순으로 사용자들이 중요하게 여긴다는 결과를 얻었다. 초소형전기차 이미지 설문조사에서는 사용자들이 초소형전기차를 오토바이와 비교했을 때 '안전성', '내구성', '승차감', '디자인', '유지관리비', '친환경성' 측면에서 더 긍정적으로 인식하고 있었다. 초소형전기차 운전자 사용자만족도 설문조사에서는 초소형전기차를 사용하는 것이 업무수행능률에 직접적인 영향을 미치지는 않았으며, 초소형전기차의 차량크기로 인해 도로에서의 불이익을 받은 경험이 있었고, 옥외 광고용으로 초소형전기차 군집 주행 시 홍보효과가 컸지만 안전성 측면에서는 우려를 나타내고 있었다. 향후 본 연구결과를 바탕으로 사용자만족도 구조방정식 모델을 구축할 예정이며, 선제적으로 공공분야에서의 초소형전기차 활용업무 서비스에 대한 피드백 R&D를 발굴하고, 새로운 공공 이동지원 서비스 발굴을 적극적으로 모색하고자 한다.

• 한국ITS학회 논문지
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• 제15권1호
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• pp.95-101
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• 2016

차량통신시스템은 차량/도로기술과 정보통신기술을 접목하여 다양한 안전 메세지를 전송하거나 지능형 교통시스템에 적용이 가능한 시스템이다. 최근 차량용 센서와 통신 기술의 발달로 길안내와 교통체중 알림 서비스뿐만 아니라 주변 차량의 주행 정보, 도로 상태정보, 차량 간 긴급 메시지 전달 등과 같은 다양한 ITS 서비스가 가능해졌다. 일반적으로 차량통신은 WAVE라고 알려져 있는 IEEE 802.11p/1609표준을 채택하여 차량간 통신 및 차량-노변기지국간 통신에 이용된다. 본 논문에서는 WAVE 통신 표준에 대하여 설명하고 신호 특성을 소개하였다. 또한 V2X 통신을 위해 실제 구현된 노변 기지국(RSS), 차량통신장치(OBE)의 소프트웨어 및 하드웨어의 특성을 분석하였다. 실제 WAVE 통신의 성능 평가를 위해 시험도로에서 시험차량의 통신장치의 수신 신호 세기 지수(RSS)를 측정하였다. 측정된 WAVE 통신 성능은 ITS 서비스에 충분히 가능함을 실제 시험을 통하여 입증하였다.

• 한국위성정보통신학회논문지
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• 제12권1호
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• pp.49-53
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• 2017

In this paper we present the combination of location based mobile advertisement services and dynamic digital signage markets has been developing recent days to provide consumer admired visual mobile advertisement on all kind transportation vehicles. In spite of that, the digital signage advertisement content management is still not that easy to manage the content dynamically as well operation is most time consuming to handle the contents dynamically in digital signage business. As location based services is most impactful service in shopping, the location responsive advertisement on vehicle signage will be most desirable mobile advertisement to help people migrate from one place to another place for travel or stay. This paper propose a mobile location responsive digital signage system for vehicles using the GPS and wireless infrastructure integrated with digital signage system. This proposed research use the centralized digital signage system architecture for the mobile advertisement application and this system can be expanded to different vehicles for digital advertisement including buses, trucks, train, air vehicle and any other form of mobile advertising vehicles. Also, this present an effective advertisement recommendation algorithm, by which the advertisement can be selected broadcasted for the right advertisement ventures more effectively as the service requested from advertiser. This paper present the emulated experimental result to evidence the proposed dynamic vehicle signage system performed better than compared with traditional signage random advertising. The emulated result proves that the advertisement recommendation algorithm can effectively works out the targeted key audiences in location responsive region the algorithm evaluated.

• 한국응급구조학회지
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• 제26권3호
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• pp.185-199
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• 2022

Purpose: Prompt arrival of emergency vehicles at the scene is important. Therefore, special cases for emergency vehicles are being applied. However, there remain obstacles that obstruct the prompt arrival during dispatch. Methods: First, a literature review revealed five categories of problems with the emergency vehicle priority signal system. Then, the first Delphi survey was conducted to confirm the validity of the five categories. Further, a second Delphi survey was conducted to identify additional problems, and we used a 5-point Likert scale for a third Delphi survey. Results: A total of 92 items were extracted from preceding studies. The validity of the five categories was confirmed in the first Delphi survey. Then, 123 additional items were derived from the second Delphi survey, and the final 50 items were selected from 93 items obtained from the third Delphi survey. Conclusion: This study revealed problems and improvement measures for improving the operation of the emergency vehicle priority signal system that were not proposed in previous studies.

• 한국IT서비스학회지
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• 제21권6호
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• pp.117-125
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• 2022

In respond to climate change caused by global environmental problems, countries around the world are actively promoting the advancement of new electricity industries. The new energy business is being applied to energy storage systems (ESS), electric vehicle charging business, and power demand response using cutting edge technologies. In 2022, the Korean government is also establishing a policy stance to foster new energy industries and making efforts to improve its responsiveness to power demand response with the innovative technologies. In Korea, attempts to commercialize energy power are also being made in the private and public sectors to control energy power in houses, buildings, and industries. For example, private companies, local governments, and central government are making all-out efforts to develop new energy industry models through joint investment. There are forms such as establishing energy-independent facilities by region, establishing an electric vehicle charging system, controlling urban lighting systems with Information technologies, and managing demand between power suppliers and power consumers. This study examined the business model applied with energy storage system, electric vehicle charging business, smart lighting, and power demand response based on information communication technology to examine the site where smart energy system was introduced. According to this study, company missions and government tasks are suggested to apply new energy business technologies as economical energy solutions that meet the purpose of use by region, industry, and company.

• 자동차안전학회지
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• 제15권3호
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• pp.34-42
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• 2023

Simulation-based virtual testing is known to be a major requirement for verifying the safety of autonomous driving functions. However, in the simulation environment, there is a difficulty in that all driving environments related to the autonomous driving system must be realistically modeled. In particular, C-ITS (Cooperative-Intelligent Transport Systems) is essential for urban autonomous driving of Lv.4, but the approach to modeling for C-ITS service in the MILS (Model in the Loop Simulation) environment is not yet clear. Therefore, this paper aims to deal with V2X (Vehicle to Everything) modeling methods to effectively apply C-ITS-based autonomous cooperative driving services in the MILS environment. First, major C-ITS services and use cases for autonomous cooperative driving are analyzed, and a modeling method of V2X signals for C-ITS service simulation is proposed. Based on the modeled V2X messages, the validity of the proposed approach is reviewed through simulations on the C-ITS service use case.