• 한국ITS학회:학술대회논문집
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• 2010.05a
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• pp.33-36
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• 2010

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.15 no.4
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• pp.115-128
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• 2016

Many research activities to reduce accidents on the road and to improve traffic efficiency have been performed and almost research projects are developing technologies and services based on C-ITS technology nowadays. The main concept of C-ITS is improving road safety and traffic efficiency by sharing and reproducing information between various elements. To accomplish this goal, V2X communication technology has been adopted. In Korea, we have studied V2X communication technology in support of SMART-Highway research project and are managing test-bed to verify the developed technology recently. In this paper, we introduce SMART-Highway test-bed and show the procedure and result of V2X communication performance analysis on the test-bed.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.21 no.1
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• pp.51-63
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• 2022

Convoy driving is one of the technologies of multi-vehicle cooperation driving along with platoon driving. All over the world, research on vehicle control mechanisms to maintain vehicle formation during convoy driving convoy driving has been actively conducted and in Europe's Autonet 2030 project has developed and demonstrated convoy driving services for highways. But, even the concept of convoy driving is still insufficient in Korea. Therefore, in this study, the concept of convoy driving service was established and scenarios and communication messages for service application on urban roads were developed. And its effectiveness was verified through simulation analysis. As a result of comparing and analyzing individual vehicle cooperative driving and convoy driving for the blind spot support service and dilemma zone safety support service, which are representative V2I cooperative driving services on urban roads, the number of conflicts(indicator of traffic safety) and delays and stops(indicator of traffic efficiency) are significantly improved in convoy driving compared to individual vehicle cooperative driving.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.49 no.8
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• pp.98-103
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• 2012

Recently, the intelligent transportation system (ITS) that provides driver convenience and reduces the number of road casualties is in the spotlight. ITS must quickly deal with the emergency situation and provide information which drivers need. In ITS, a different channel will be assigned for each service to provide the service efficiently. However, if the channel is used at an emergency situation, the service cannot be provided immediately. For overcome this problem, we introduce the cognitive radio technology into ITS and propose a new spectrum sensing method in this paper.

• Information and Communications Magazine
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• v.31 no.8
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• pp.45-53
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• 2014

센싱 (Sensing), 엑츄에이팅 (Actuating), 제어 (Control) 및 네트워킹 (Networking) 기술의 급격한 발달로 기계, 전자장비, 사회 기반시설, 에너지 공급 및 소비시설, 의료기기, 자동차 등과 같은 물리 세계를 구성하는 다양한 개체들간의 긴밀한 융합이 가능하게 되었다. 다양한 센서를 통하여 물리 개체들로부터 필요한 정보를 수집, 분석하고 가공된 정보를 다양한 컨트롤러, 엑츄에어터 등과 공유함으로써 기존의 개별 전자기기를 위한 센싱 엑츄에이팅 기반 임베디드 시스템과는 근본적으로 차별화되는 복잡한 시스템 위의 시스템 (Systems of Systems) 기술이 제안되어 개발되고 있다. 이렇게 사이버 세계 정보처리 기능과 물리 세계가 서로 긴밀하게 응답하고, 협력하는 인지형 컨트롤 시스템을 사이버물리시스템 (Cyber-Physical Systems, CPS)이라 부른다. 사이버 물리시스템은 대부분의 정보처리, 제어 컴퓨팅 분야에 적용되어 효율성, 안전성, 보안성 향상에 획기적인 기여를 할 것으로 기대된다. 특히, 지능화된 사이버 정보수집 및 최적 제어 기술을 기반으로 도시의 지능형 교통 제어, 건물그룹의 에너지 소비분석과 최적제어, 스마트 스페이스 서비스 등 다양한 분야에 적용되어 스마트 시티 (Smart City)라는 새로운 지능형 통합 시스템을 구현하고 현실화 하는데 핵심 기능을 담당할 것으로 기대된다. 본고에서는 사이버물리시스템의 전반적인 소개와 함께, 스마트 시티를 현실화하는데 사용될 핵심 기술 분야를 소개하고, 스마트 시티 시스템에서 사이버물리시스템이 어떤 역할을 하는지에 대해, 핵심기술들이 적용되는 도시 내 대상 공간의 규모별로 구분하여 기술한다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.19 no.5
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• pp.151-161
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• 2020

In this paper, Korea's standardization capacity in the ITS field was examined, and the status of participation in ITS standardization and services of ASEAN countries, and the degree of hope for cooperation with Korea was investigated and analyzed. Korea is recognized for its international competency in the field of ITS standardization, and most ASEAN countries, excluding Singapore, are found to have insufficient participation in ITS standardization and service introduction. In addition, most ASEAN countries are strongly hoping for ITS standardization cooperation with Korea, and the preliminary establishment of the ITS system architecture as the basis for ITS standardization was derived as a project of hope for cooperation. In addition, as a service field for introducing standardization, Freight transport was suggested as a priority application service field in order to improve the efficiency of logistics transportation between ASEAN countries.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.21 no.3
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• pp.18-29
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• 2022

Recently, cooperative intelligent transport systems (C-ITS) testbeds have been deployed in great numbers, and advanced autonomous driving research using V2X communication technology has been conducted actively worldwide. In particular, the broadcasting services in their beginning days, giving warning messages, basic safety messages, traffic information, etc., gradually developed into advanced network services, such as platooning, remote driving, and sensor sharing, that need to perform real-time. In addition, technologies improving these advanced network services' throughput and latency are being developed on many fronts to support these services. Notably, this research analyzed the network latency requirements of the advanced network services to develop a remote driving service for the droid type low-speed robot based on the 3GPP C-V2X communication technology. Subsequently, this remote driving service's performance was evaluated using system modeling (that included the operator behavior) and simulation. This evaluation showed that a respective core and access network latency of less than 30 ms was required to meet more than 90 % of the remote driving service's performance requirements under the given test conditions.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.16 no.5
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• pp.96-108
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• 2017

The current collision warning and avoidance system(CWAS) is one of the representative Advanced Driver Assistance Systems (ADAS) that significantly contributes to improve the safety performance of a vehicle and mitigate the severity of an accident. However, current CWAS mainly have focused on preventing a forward collision in an uninterrupted flow, and the prevention performance near intersections and other various types of accident scenarios are not extensively studied. In this paper, the safety performance of Vision-Sensor (VS) and Radar-Sensor(RS) - based collision warning systems are evaluated near an intersection area with the data from Naturalistic Driving Study(NDS) of Second Strategic Highway Research Program(SHRP2). Based on the VS and RS data, we newly derived sixteen vehicle-to-vehicle accident scenarios near an intersection. Then, we evaluated the detection performance of VS and RS within the derived scenarios. The results showed that VS and RS can prevent an accident in limited situations due to their restrained field-of-view. With an accident prevention rate of 0.7, VS and RS can prevent an accident in five and four scenarios, respectively. For an efficient accident prevention, a different system that can detect vehicles'movement with longer range than VS and RS is required as well as an algorithm that can predict the future movement of other vehicles. In order to further improve the safety performance of CWAS near intersection areas, a communication-based collision warning system such as integration algorithm of data from infrastructure and in-vehicle sensor shall be developed.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.40 no.1
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• pp.96-107
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• 2015

VANET technologies provide real-time traffic information for mitigating traffic jam and preventing traffic accidents, as well as in-vehicle infotainment service through Telematics/Intelligent Transportation System (ITS). Due to the rapid increasement of various requirements, the vehicle communication with a limited resource and the fixed frame architecture of the conventional techniques is limited to provide an efficient communication service. Therefore, a new flexible operation depending on the surrounding situation information is required that needs an adaptive design of the network architecture and protocol for efficiently predicting, distributing and sharing the context-aware information. In this paper, Vehicle-to-Infrastructure (V2I) based on communication between vehicle and a Road Side Units (RSU) and Vehicle-to-Vehicle (V2V) based on communication between vehicles are effectively combined in a new MAC architecture and V2I and V2V vehicles collaborate in management. As a result, many vehicles and RSU can use more efficiently the resource and send data rapidly. The simulation results show that the proposed method can achieve high resource utilization in accordance. Also we can find out the optimal transmission relay time and 2nd relay vehicle selection probability value to spread out V2V/V2I collaborative schedule message rapidly.