• Title/Summary/Keyword: LTE-V2X

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V2X Communication Module Design with Hybrid LTE-WAVE (LTE-WAVE 복합형 V2X 통신모듈 설계)

  • Lim, Ki-taeg;Jin, Seong-keun;Kwak, Jae-min
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2018.05a
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    • pp.395-398
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    • 2018
  • we propose a design method and process for hardware and software of hybrid V2X communication systems that support both C-ITS communication protocol and Legacy LTE communication technology. The hybrid V2X communication systems support 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.

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Design of Hybrid V2X Communication Module for Electromagnetic Confirmity Evaluation (전자파 적합성 평가를 위한 하이브리드 V2X 통신모듈 설계)

  • Seungkyu Choi;Juwon Lee;Kyuhyeon Kim
    • Journal of Auto-vehicle Safety Association
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    • v.15 no.4
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    • pp.65-70
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    • 2023
  • In the paper, we propose a design method and process of a hybrid V2X communication module that combines WAVE communication, LTE-V2X communication, and legacy LTE communication in evaluating vehicle V2X electromagnetic compatibility. C-ITS is suitable for safety service applications due to its low latency, and legacy LTE is suitable for applications such as traffic information and infotainment due to its high latency and high capacity. In order to evaluate the V2X communication system, the evaluation equipment must have communication performance of the same level or higher. The main design contents presented in this paper will be applied to the implementation of a hybrid V2X communication module for electromagnetic compatibility evaluation.

Coverage Test of WAVE-LTE Hybrid V2X Communication System (WAVE-LTE 하이브리드 V2X 통신시스템의 커버리지 테스트)

  • Yoon, Sang-hun;Lim, Ki-taeg;Kwak, Jae-min
    • Journal of Advanced Navigation Technology
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    • v.24 no.3
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    • pp.212-217
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    • 2020
  • Recently, with the interest in the 4th industrial revolution, the demand for autonomous driving technology is increasing. V2X communication technology is a core technology for autonomous vehicles that exchanges information with objects such as vehicles, infrastructure, networks, and pedestrians through wired and wireless networks. In this paper, we present the results of the hybrid V2X communication system, which is a hybrid design of WAVE and LTE, and the coverage test to confirm the performance of the system. Through coverage measurement, we show that the hybrid V2X communication performance is superior to the existing LTE or WAVE single communication system in communication coverage, so it can be effectively applied to autonomous driving services.

V2X Communication Technology Trends (V2X 통신 기술 동향)

  • Han-gyun Jung;Seong-keun Jin;Jae-min Kwak
    • Journal of Advanced Navigation Technology
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    • v.27 no.6
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    • pp.861-864
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    • 2023
  • Recently, V2X (vehicle-to-everyting) communication has established itself as an essential technology for cooperative autonomous driving. V2X communication currently includes DSRC (dedicated short range communication) communication technology, which is a WLAN (wireless local area network) based communication technology, and C-V2X (cellular-V2X) communication technology, which is a Cellular-based communication technology. Since these two communication methods are not compatible with each other, various studies and experiments are being conducted to select one of the two communication methods. In the case of C-V2X communication, there are LTE-V2X (long term evolutionV2X) communication technology, which is an initial version, and 5G-V2X communication technology, which is a next-generation version. 5G-V2X communication technology has been completed only until standardization, so LTE-V2X communication technology is mainly used. In this paper, we introduce trends related to various issues in V2X communication, including communication method decisions.

Design of Hybrid V2X Communication Module for Cooperative Automated Driving (자율협력주행을 위한 하이브리드 V2X 통신모듈 설계)

  • Lim, Ki-taeg;Jin, Seong-keun;Kwak, Jae-min
    • 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.

Design of Hybrid V2X Communication Platform for Evaluation of Commercial Vehicle Autonomous Driving and Platooning (상용차 자율 군집 주행 평가를 위한 하이브리드 V2X 통신 플랫폼 설계)

  • Jin, Seong-keun;Jung, Han-gyun;Kwak, Jae-min
    • 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.

A Study on MEC Network Application Functions for Autonomous Driving (자율주행을 위한 MEC 적용 기능의 연구)

  • Kang-Hyun Nam
    • The Journal of the Korea institute of electronic communication sciences
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    • v.18 no.3
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    • pp.427-432
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    • 2023
  • In this study, MEC (: Multi-access Edge Computing) proposes a cloud service network configuration for various tests of autonomous vehicles to which V2X (: Vehicle to Everything) is applied in Wave, LTE, and 5G networks and MEC App (: Application) applied V2X service function test verification of two domains (operator (KT, SKT, LG U+), network type (Wave, LTE (including 3G), 5G)) in a specific region. In 4G networks of domestic operators (SKT, KT, LG U+ and Wave), MEC summarized the improvement effects through V2X function blocks and traffic offloading for the purpose of bringing independent network functions. And with a high level of QoS value in the V2X VNF of the 5G network, the traffic steering function scenario was demonstrated on the destination-specific traffic path.

Timing Data Optimize of Traffic Intersection C-ITS Message Set for LTE-based V2X in-vehicle Devices (LTE 기반 차량용 V2X 통신단말에 대한 신호 교차로 C-ITS 메시지의 타이밍 데이터 최적화 기법)

  • Park, Su-In;Seo, Woo-Chang;Yang, Eun-Ju;Seo, Dae-Wha
    • Journal of Auto-vehicle Safety Association
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    • v.14 no.1
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    • pp.45-54
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    • 2022
  • Recently, the introduction of Cooperative Intelligent Transport Systems (C-ITS) has been attempted to solve the limitation of only the sensor of the vehicle itself. For example, vehicles traveling at intersections can drive more safely through C-ITS. By using V2X communication of WAVE and LTE, the driver can receive the status and time of traffic lights. However, LTE has a larger transmission delay time than WAVE, so timimg data may not match in real time. In this paper, using the SPaT message, it was confirmed that LTE has a larger C-ITS service transmission delay time than WAVE. Finally, it was confirmed that the timing data of SPaT provided by LTE corrected by the algorithm is similar to SPaT provided by WAVE. It was confirmed that safer intersection driving is possible based on real-time.

A Study on the Time Delay Characteristics of Traffic Signal Phase and Timing Information Providing System (신호현시 정보 제공 시스템의 시간 지연특성 연구)

  • Bae, Jeong Kyu;Seo, Kyung Duk;Seo, Woo Chang;Seo, Dae Wha
    • Journal of Auto-vehicle Safety Association
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    • v.14 no.3
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    • pp.48-59
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    • 2022
  • A V2X system can be a candidate as a means to increase the stability of autonomous vehicles. In particular, in order to implement a Level 4 or higher autonomous driving system, the application of the V2X system is essential. Wireless communication technologies applicable to the V2X system include WAVE and C-V2X. Currently, the V2X service most used by autonomous driving systems is a service that provides signal phase and timing information and since real-time characteristic is a very important, verification of this service must be done. In this paper, we measured the time delay characteristics for providing signal phase and timing information using WAVE and LTE communication, and proposed a TOD-based signal phase and timing information generation method without using V2X communication system. To analyze the time delay characteristics, RTT (Round Trip Time) was measured as a result of the measurement. Average RTT using WAVE communication was 5.84ms and was 104.15ms with LTE communication. As a result of measuring the error between the signal phase and timing information generated based on TOD and the actual traffic light state, it was measured to be -0.284~3.784sec.

Performance Analysis of New LMMSE Channel Interpolation Scheme Based on the LTE Sidelink System in V2V Environments (V2V 환경에서 LTE 기반 사이드링크 시스템의 새로운 LMMSE 채널 보간 기법에 대한 성능 분석)

  • Chu, Myeonghun;Moon, Sangmi;Kwon, Soonho;Lee, Jihye;Bae, Sara;Kim, Hanjong;Kim, Cheolsung;Kim, Daejin;Hwang, Intae
    • Journal of the Institute of Electronics and Information Engineers
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    • v.53 no.10
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    • pp.15-23
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    • 2016
  • To support the telematics and infotainment services, vehicle-to-everything (V2X) communication requires a robust and reliable network. To do this, the 3rd Generation Partnership Project (3GPP) has recently developed V2X communication. For reliable communication, accurate channel estimation should be done. However, because vehicle speed is very fast, radio channel is rapidly changed with time. Therefore, it is difficult to accurately estimate the channel. In this paper, we propose the new linear minimum mean square error (LMMSE) channel interpolation scheme based on the Long Term Evolution (LTE) sidelink system in vehicle-to-vehicle (V2V) environments. In our proposed reduced decision error (RDE) channel estimation scheme, LMMSE channel estimation is applied in the pilot symbol, and then in the data symbol, smoothing and LMMSE channel interpolation scheme is applied. After that, time and frequency domain averaging are applied to obtain the whole channel frequency response. In addition, the LMMSE equalizer of the receiver side can reduce the error propagation due to the decision error. Therefore, it is possible to detect the reliable data. Analysis and simulation results demonstrate that the proposed scheme outperforms currently conventional schemes in normalized mean square error (NMSE) and bit error rate (BER).