• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.21 no.5
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• pp.28-41
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• 2022

A road system with CV(Connected Vehicle)s, which is often referred to as a cooperative intelligent transportation system (C-ITS), provides various road information to drivers using an in-vehicle warning system. Road environments with CVs induce drivers to reduce their speed or change lanes to avoid potential risks downstream. Such avoidance maneuvers can be considered to improve driving behaviors from a traffic safety point of view. Thus, empirically evaluating how a given in-vehicle warning information affects driving behaviors, and monitoring of the correlation between them are essential tasks for traffic operators. To quantitatively evaluate the effect of in-vehicle warning information, this study develops a method to calculate compliance rate of drivers where two groups of speed profile before and after road information is provided are compared. In addition, conventional indexes (e.g., jerk and acceleration noise) to measure comfort of passengers are examined. Empirical tests are conducted by using PVD (Probe Vehicle Data) and DTG (Digital Tacho Graph) data to verify the individual effects of warning information based on C-ITS constructed in Seoul metropolitan area in South Korea. The results in this study shows that drivers tend to decelerate their speed as a response to the in-vehicle warning information. Meanwhile, the in-vehicle warning information helps drivers to improve the safety and comport of passengers.

• International Journal of Computer Science & Network Security
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• v.23 no.2
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• pp.111-125
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• 2023

Due to the car's central role in modern life, the industry has become more fiercely competitive, with each manufacturer doing everything it can to attract buyers with features like plush interiors, comprehensive warranties, and helpful customer service departments. Customers may not have the luxury of buying a new car, so they will have to buy a used car. Nevertheless, in most cases, the customer (car driver) may be deceived about the vehicle information and history and thus will be confused in making his/her decision to purchase. In addition, after all attempts to obtain vehicle information (plate number, model, year of manufacture, number of maintenance times, accidents, etc.), the customer's many attempts may fail. In general, the government records and verifies the information of all cars, even those that pass through their borders. However, there might still be some trouble in obtaining this information. From this standpoint, we will design a website that makes it easier for car drivers, car companies and governments to carry out all the above-mentioned processes. It will also allow users, whether a driver or a car company, to inquire about all vehicle information through detailed and integrated reports on its condition since its entry into the Kingdom of Saudi Arabia until the present time, in addition to information supported by numbers and statistics to ensure the integrity and reliability of the information. This platform will save the trouble of searching for car information for drivers and car companies. It will also help governments keep track of the information of all cars entering and leaving the Kingdom of Saudi Arabia, which will contribute to facilitating the process of viewing the history of any car that has previously entered the Kingdom's borders.

• Information and Communications Magazine
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• v.34 no.6
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• pp.27-33
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• 2017

차량사물통신은 차량이 다양한 대상과 유무선 망을 이용해 정보를 주고 받는 기술을 의미한다. 차량사물통신을 이용하면 실시간으로 변화하는 교통 상황에 대해 개별 차량의 안정성을 크게 향상시킬 수 있다. 차량사물통신을 실현하기 위해서는 고도화 된 통신 기술들이 집약적으로 활용되어야 하며, 이러한 차량사물통신은 차세대 통신 시스템에서 각광받는 주요 기술이다. 본고는 차량사물통신을 위한 통신 기술 중 특별히 5G 통신에 관련된 세부 기술들을 소개한다. 먼저 차량사물통신을 위한 무선 통신에서 요구되는 기술적인 어려움에 대해 논의하고, 이를 바탕으로 차량사물통신에 대한 5G 통신 기술의 필요성에 관해 논의한다. 다음으로 차량사물통신을 위한 5G 통신의 세부기술들을 소개하고, 각 기술에 대한 기술적인 과제와 적용 시나리오에 대해 알아본다.

• Electronics and Telecommunications Trends
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• v.30 no.5
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• pp.39-48
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• 2015

최근 스마트카 기술은 안전운전지원 센서 기반의 단독형 시스템에서 도로 인프라와 빅 데이터를 기반으로 ICT와 연계하여 교통흐름을 예측하고 대응할 수 있는 협력형 자율주행 서비스 개발로 발전하고 있다. 협력형 자율주행 서비스를 실현하거나, IoT 환경과 스마트카의 융합을 위해서는 스마트카에서 커넥티비티 역량이 무엇보다도 중요하게 되었으며 이를 위한 요소기술로 차량용 이더넷, V2X(Vehicle to Everything) 네트워킹, 네트워크 보안기술을 꼽을 수 있다. 본고에서는 스마트카에 적용되는 차량 내부 네트워크 및 게이트웨이, V2X 네트워킹 및 보안에 관한 최근 표준 기술동향 및 이슈를 살펴보고자 한다.

• Broadcasting and Media Magazine
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• v.24 no.1
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• pp.23-32
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• 2019

KT는 5G의 핵심서비스로서 자율주행차를 선정하고, 5G를 통한 자율주행 기술 개발에 중점을 두고 있다. 5G 자율주행 핵심 기술 3가지로 5G Infra, 차량사물통신(V2X, Vehicle-to-Everything), 정밀측위(RTK, Real Time Kinematic)를 정의하고 개발해왔다. 5G Infra를 통해 차량 서비스 별로 특화된 전용 슬라이스를 제공하고, 차량 이동 중에도 네트워크와의 연결이 끊기지 않도록 연속적인 5G 커버리지를 제공한다. V2X를 통해 자율주행차 센서 성능을 보완하고 정밀측위를 이용한 정확한 차량제어를 통해 자율주행 성능을 개선하여, 국내 최초로 대형버스의 자율주행을 가능하게 하였다. 5G 자율주행기술은 KT의 자율주행차에 탑재되어 있으며, 이를 바탕으로 5G 자율주행버스, 5G기반 자율주행차 원격제어 등의 다양한 서비스를 선보였다.

• Journal of Advanced Navigation Technology
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• v.22 no.3
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• pp.213-219
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• 2018

In this paper, we propose a design method and process for hardware and software of hybrid V2X communication module that supports both C-ITS communication protocol designed for vehicle environment and Legacy LTE communication technology. C-ITS is suitable for safety service applications due to its low latency characteristics, and Legacy LTE is a technology suitable for non-safety applications such as traffic information and infotainment due to high latency and high capacity. The hybrid V2X communication module supports multiple communication technologies of WAVE and LTE, in which WAVE supports multiple channels, so that it is designed to transmit road information such as LDM and positioning correction information to an autonomous vehicle in real time. The main design results presented in this paper will be applied to the implementation of future hybrid V2X communication terminals for vehicles.

• Journal of Advanced Navigation Technology
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• v.22 no.5
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• pp.391-399
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• 2018

V2X communication is a technology in which a vehicle exchanges information with various entities such as other vehicles, infrastructure, networks, pedestrians, etc. through a wired or wireless network. Recently, V2X communication technology has been steadily developed and recently it has played an important role in autonomous cooperation driving technology combined with autonomous vehicle technology. Autonomous vehicles can utilize the external information received via V2X communication to extend the recognition range of existing sensors and to support more safe and natural autonomous driving. In order to operate these autonomous cooperative vehicles on public roads, the security and reliability of autonomous V2X communication should be verified in advance. In this paper, we present test scenarios and test procedures of secure V2X communication for cooperative automated driving and present verification results.

• Journal of Advanced Navigation Technology
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• v.24 no.6
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• pp.521-526
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• 2020

In this paper, we propose a design method and process for hybrid V2X communication platform that combines WAVE communication and LTE-V2X communication which are C-ITS communication protocols for vehicle environments and Legacy LTE communication which is a commercial mobile communication for evaluating the autonomous platooning platform of commercial vehicles. For a safe and efficient autonomous platooning platform, an low-latency communication function based on C-ITS communication is required, and to control it, commercial communication functions such as Legacy LTE, which can be connected at all times, are required. In order to evaluate such a system, the evaluation equipment must have the same level of communication performance or higher. The main design contents presented in this paper will be applied to the implementation of hybrid V2X terminals for functional evaluation.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.9 s.351
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• pp.40-48
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• 2006

In this paper, we propose the EPTS(Emergency vehicle Priority Transit system) for a rapid drive or emergency vehicles at the crossroads. The EPTS is one part of real-time traffic management system in the advanced traffic management system. The EPTS needs the connection or a traffic control system and a DSRC system. It can be applied to the real traffic situation considered with other traffic elements. As the result it is possible for the EPTS to nonstop drive because it induces an efficient drive of emergency vehicles. It is also relatively safe at the crossroad, it is expected that the EPTS is suitable for a telematics service which values efficiency above everything else.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.16 no.9
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• pp.3138-3151
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• 2022

Traffic safety and congestion are becoming more and more serious, especially the frequent occurrence of traffic accidents, which have caused great casualties and economic losses. Cellular Vehicle to Everything (C-V2X) can assist in safe driving and improve traffic efficiency through real-time information sharing and communication between vehicles. All vehicles communicate directly with Base Stations (BS), which will increase the base station load. And when the communicating vehicles are too far apart, too fast or there are obstacles in the communication path, the communication link can be unstable or even interrupted. Therefore, choosing an effective and reliable multi-hop relay-assisted Vehicle to Vehicle (V2V) communication can not only reduce the base station load and improve the system throughput but also expand the base station coverage and improve the communication quality of edge vehicles. Therefore, a communication area division scheme based on regular hexagon segmentation technology is proposed, a relay-assisted V2V communication mechanism is designed for the divided communication areas, and an efficient communication link is constructed by selecting the best relay node. Simulation results show that the scheme can improve the throughput of the system by nearly 55% and enhance the robustness of the V2V communication link.