• Title/Summary/Keyword: Car Sharing

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Road Aware Information Sharing in VANETs

  • Song, Wang-Cheol;Rehman, Shafqat Ur;Awan, Muhammad Bilal
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.9
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    • pp.3377-3395
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    • 2015
  • Recently, several approaches to share road conditions and/or digital contents through VANETs have been proposed, and such approaches have generally considered the radial distance from the information source as well as the TTL to provision an ephemeral, geographically-limited information sharing service. However, they implement general MANETs and have not been tailored to the constrained movement of vehicles on roads that are mostly linear. In this paper, we propose a novel application-level mechanism that can be used to share road conditions, including accidents, detours and congestion, through a VANET. We assign probabilities to roads around each of the intersections in the neighborhood road network. We then use the graph representation of the road network to build a spanning tree of roads with the information source as the root node. Nodes below the root represent junctions, and the edges represent inter-connecting road segments. Messages propagate along the branches of the tree, and as the information propagates down the branches, the probability of replication decreases. The information is replicated until a threshold probability has been reached, and our method also ensures that messages are not delivered to irrelevant vehicles, independently of their proximity to the source. We evaluated the success rate and performance of this approach using NS-3 simulations, and we used IDM car following and MOBIL lane change models to provide realistic modeling of the vehicle mobility.

A Conceptual Framework of IoT Case Study (IoT 사례분석을 위한 개념적 틀 제시)

  • Jeon, Ka Young;Lee, Jang Hyuk;Oh, Jungsuk
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.10 no.3
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    • pp.123-131
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    • 2015
  • With a prospective of rapid deployment of IOT, a systematic approach to derive a business strategy for various possible scenarios of IOT applications is in great demand. In this paper, a conceptual framework that can be utilized for the purpose of assessing the market potential and of setting up an initial business strategy for IOT deployment is suggested. The framework consists of utilization of well-known value curve analysis, ecosystem analysis and house of quality tools. The value curve analysis is utilized to identify value-enhancing components of consumers as well as relative strengths of suppliers. The ecosystem analysis is used to identify relevant players of the supply chain and their mutual relationships. The house of quality is suitable for developing the initial business strategy of the supplier by converting consumer requirements identified by value curve analysis into technical requirements for the supplier. In this paper, we applied our proposed framework to two services that have high potentiality of being benefited by IOT: car-sharing service and telehealth service.

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A Study of the Autonomous Vehicle Technology and its Future Trend : Focusing on Current Industry and Technology Convergence of Trend (자율주행 기술의 현황과 미래 동향 고찰 : 산업계 동향을 중심으로 기술 융합 관점의 접근)

  • Park, Seongkeun
    • Journal of the Korea Convergence Society
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    • v.9 no.1
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    • pp.253-259
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    • 2018
  • The Korea Convergence Society. Recently, as the 4th industrial revolution is rising, there are many changes in various field of industries. Among these industries, autonomous vehicles based on artificial intelligence, big data and internet of things is one of the most promising industry. Autonomous vehicle stray from classical car domain of manufacturers and suppliers, IT/Electronics suppliers and communication companies are widen their business area to autonomous vehicle technology. In this paper, we analysis the state of art of autonomous vehicle technology and development direction of industries/research institute. Finally, we discuss the social/economic effects of autonomous vehicle.

A Study on Mitigation Methods for Broadcast Storm Problem over Vehicular CCN (VCCN에서 Broadcast Storm 문제를 완화시키는 방법에 대한 연구)

  • Yeon, Seunguk;Chae, Ye-eun;Kang, Seung-Seok
    • The Journal of the Convergence on Culture Technology
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    • v.5 no.1
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    • pp.429-434
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    • 2019
  • There are several high technologies applied to the driving cars such as self-driving car and connected car for safe and convenient driving. VANET provides useful information such as route selection and gas price by communicating nearby cars and RSUs. VANET prefers CCN rather than traditional TCP/IP stack because CCN offers inherent multicast communication for sharing traffic information as well as traditional unicast. When all participating node rebroadcasts the Interest packets in a Vehicular CCN, the network may suffer from Broadcast Storm Problem. In order to mitigate the effect of the problem and to improve the Data packet transmission, not all but some selected nodes have to rebroadcast the packet. This paper simulates car movements using SUMO and evaluates data transmission performance using ns-3. According to the simulation results, when some selected nodes rebroadcast the Interest packets, the transmission performance improves 10% to 25% depending on the number of requesting nodes.

PCMM-Based Feature Compensation Method Using Multiple Model to Cope with Time-Varying Noise (시변 잡음에 대처하기 위한 다중 모델을 이용한 PCMM 기반 특징 보상 기법)

  • 김우일;고한석
    • The Journal of the Acoustical Society of Korea
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    • v.23 no.6
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    • pp.473-480
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    • 2004
  • In this paper we propose an effective feature compensation scheme based on the speech model in order to achieve robust speech recognition. The proposed feature compensation method is based on parallel combined mixture model (PCMM). The previous PCMM works require a highly sophisticated procedure for estimation of the combined mixture model in order to reflect the time-varying noisy conditions at every utterance. The proposed schemes can cope with the time-varying background noise by employing the interpolation method of the multiple mixture models. We apply the‘data-driven’method to PCMM tot move reliable model combination and introduce a frame-synched version for estimation of environments posteriori. In order to reduce the computational complexity due to multiple models, we propose a technique for mixture sharing. The statistically similar Gaussian components are selected and the smoothed versions are generated for sharing. The performance is examined over Aurora 2.0 and speech corpus recorded while car-driving. The experimental results indicate that the proposed schemes are effective in realizing robust speech recognition and reducing the computational complexities under both simulated environments and real-life conditions.

A Novel Vehicle Counting Method using Accumulated Movement Analysis (누적 이동량 분석을 통한 영상 기반 차량 통행량 측정 방법)

  • Lim, Seokjae;Jung, Hyeonseok;Kim, Wonjun;Lee, Ryong;Park, Minwoo;Lee, Sang-Hwan
    • Journal of Broadcast Engineering
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    • v.25 no.1
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    • pp.83-93
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    • 2020
  • With the rapid increase of vehicles, various traffic problems, e.g., car crashes, traffic congestions, etc, frequently occur in the road environment of the urban area. To overcome such traffic problems, intelligent transportation systems have been developed with a traffic flow analysis. The traffic flow, which can be estimated by the vehicle counting scheme, plays an important role to manage and control the urban traffic. In this paper, we propose a novel vehicle counting method based on predicted centers of each lane. Specifically, the centers of each lane are detected by using the accumulated movement of vehicles and its filtered responses. The number of vehicles, which pass through extracted centers, is counted by checking the closest trajectories of the corresponding vehicles. Various experimental results on road CCTV videos demonstrate that the proposed method is effective for vehicle counting.

An Socio-Economic Effect Analysis of Using Open Spectrum in Korea (개방형 스펙트럼 이용의 사회경제적 파급 효과 분석)

  • Park, Seok-Ji;Park, Duk-Kyu;Kim, Chang-Joo;Kang, Young-Heung
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.25 no.10
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    • pp.983-994
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    • 2014
  • In this paper, we analyze the telecom services and their socio-economic effect of using open spectrum, which is to access sharing spectrum. For this, we suggest a concept and a classification of open spectrum as spectrum access model and make a survey for analyzing the socio-economic effect of spectrum, 2,605 MHz which is candidated for sharing between 2.9~5.925 Hz in Korea. From survey results, we propose Mobile Telecommunications Assist Service and WiFi as the most effective services and Smart Car Service and M2M, IoT, and RFID/USN Service as the effective services to open spectrum.

Functional System Analysis of On Board Control Unit for VAL 208 Light Rail Train on Uijeongbu City (의정부경전철 VAL208 차상열차제어장치의 시스템 인터페이스 기능분석)

  • Yang, Doh-Chul;Park, Dong-Hoon;Hwang, Ja-Ho
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.2718-2725
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    • 2011
  • The VAL 208 in Uijeongbu Light Rail system is a light railway vehicle which could be operated in driverless supported by Siemens. It is a Rubber Wheel Type AGT (Automatic Guideway Transit). It will be operated in two car train about 11km of Uijeongbu line. In this paper, the technical overview of the ATC system and the interface between the system and the way side control equipments are presented. It includes the main functions of OBCU(On Board control Unit) and its information sharing method with WCU(Way side control Unit). The testing procedure of OBCU is also discussed.

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시사특집 - 그린 카 시대에 대비한 타이어업체의 대응 전략

  • Lee, Hang-Gu
    • The tire
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    • s.243
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    • pp.10-21
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    • 2010
  • 세계경제 불황 이후 자동차산업의 뉴 노멀(New Normal)은 산업 중심지의 동북아 이동 그린 카 소형차 저가차 개발의 가속화 완성차업체간 제휴 확산과 자동차의 공동사용(Car Sharing) 모색 등을 들 수 있다. 이중 주목할 부문은 그린 카 개발과 상용화의 가속화다. 각국 정부가 환경, 연비, 안전 규제를 강화하고 있고 자동차산업의 성장 기반 강화를 위해서 산관 공동으로 그린 카 개발과 상용화에 막대한 재원을 투입하고 있기 때문이다. 주요 완성차업체들은 21세기 세계 자동차산업을 주도할 그린 카 기술과 시장을 선점하기 위해 철저한 기술보호와 함께 합종연횡을 확대하고 있다. 각국 정부도 시범 도시와 구역을 지정해 그린 카 운행을 지원하면서 보급 확산에 적극 나서고 있다. 이하에서는 불황 이후의 지동차산업 환경변화 각국의 그린 카 지원 정책, 자동차업계의 개발 및 상용화 전략, 그린 카에 대한 소비자 인식과 향후 수요 전망 및 우리 정부와 지동차업계의 그린 카 전략 추진 방향에 대해 살펴 본 후 타이어업계의 대응 전략을 제시해 보기로 한다.

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A Negotiation Method Based on Opportunity Cost in the Trucking Cargo Transportation Market (육상화물운송시장에서 기회비용을 고려한 협상방법론 연구)

  • Kim, Hyun-Soo;Cho, Jae-Hyung
    • The Journal of Information Systems
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    • v.21 no.3
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    • pp.99-116
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    • 2012
  • As a way to allocate lots of orders to many participants for vehicle allocation problem, this study has used an agent negotiation based reverse auction model. This agent negotiation provides coordination functions allowing all participants to make a profit, and accomplishing Pareto optimum solution from the viewpoint of a whole trucking cargo transportation network. In order to build a strategic cooperation relationship based on information sharing, this agent negotiation provides a coordination mechanism in which all the participants including consignors, brokerage firms, and car owners are able to attain their own profits, and also that ensure a competitive market. This study has tried to prove that the result of an agent-based negotiation is the Pareto optimal solution under the present market environment. We established a mathematical formulation for a comparison with the Integer Programming model, and analysing e-Marketplace, structure of shipping expenses and brokerage system in the trucking cargo transportation industry.