• Title/Summary/Keyword: WAVE(Wireless Access for Vehicular Environment)

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A Study on The Frequency Allocation of WAVE for Smart Vehicle Industry (스마트 자동차 산업 발전을 위한 WAVE 통신용 주파수 분배에 대한 고찰)

  • Kim, Seungcheon
    • Journal of the Institute of Electronics and Information Engineers
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    • v.51 no.6
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    • pp.183-189
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    • 2014
  • A recent trend of 'Smart Technology' has changed the simple and normal car into smart vehicle. Smart vehicle has a complex aspects of technologies and Wireless Access in Vehicular Environment (WAVE) is the technology that is mentioned for the communication infrastructure of Smart Vehicle. The current status about WAVE in Korea, however, is not good to be used in smart vehicular communication. The reason for that is that the frequency band for WAVE is not assigned or allocated in Korea. In this paper, we will explore the current status of technology standard for WAVE and investigate the way of frequency allocation for WAVE with the survey analysis from the smart vehicle industry.

The Algorithm Design and Implemention for Operation using a Matrix Table in the WAVE system (WAVE 시스템에서 행렬 테이블로 연산하기 위한 알고리즘 설계 및 구현)

  • Lee, Dae-Sik;You, Young-Mo;Lee, Sang-Youn;Jang, Chung-Ryong
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.37 no.4A
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    • pp.189-196
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    • 2012
  • A WAVE(Wireless Access for Vehicular Environment) system is a vehicle communication technology. The system provides the services to prevent vehicle accidents that might occur during driving. Also, it is used to provide various services such as monitoring vehicle management and system failure. However, the scrambler bit operation of WAVE system becomes less efficient in the organizations of software and hardware design because the parallel processing is impossible. Although scrambler algorithm proposed in this paper has different processing speed depending on input data 8 bit, 16 bit, 32 bit, and 64 bit. it improves the processing speed of the operation because it can make parallel processing possible depending on the input unit.

Channel Equalization Schemes using Midamble for WAVE Systems (WAVE 시스템에서 미드엠블을 이용한 채널 등화 방식)

  • Hong, Dae-Ki;Kang, Bub-Joo
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.14 no.10
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    • pp.2215-2222
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    • 2010
  • A Wireless Access for Vehicular Environment (WAVE) system based on Orthogonal Frequency Division Multiplexing (OFDM) is made for vehicle to vehicle wireless communications. The physical layer standard of the WAVE system is very similar to that of the IEEE802.11a wireless local area network (WLAN). Therefore, the performance of the WAVE system is degraded by continual channel variation in the WAVE multipath fading channels after starting initial channel estimation. In this paper, we research the performance improvement of equalization in 64 Quadrature Amplitude Modulation (QAM) transmission in WAVE environment. The proposed algorithms use the training sequence and the midamble sequence which is used for fast channel variation such as WAVE environments. Additionally, various interpolation methods are also used for the channel tracking.

Performance Evaluation of IEEE 802.11p Based WAVE Communication Systems at MAC Layer (MAC 계층에서의 IEEE 802.11p 기반 WAVE 통신 시스템의 성능 평가)

  • Choi, Kwang Joo;Kim, Jin Kwan;Park, Sang Kyu
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.25 no.5
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    • pp.526-531
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    • 2014
  • Vehicular communications have been receiving much attention in intelligent transport systems(ITS) by combining communication technology with automobile industries. In general, vehicular communication can be used for vehicle-to-vehicle(V2V) and vehicle-to-infrastructure( V2I) communication by adopting IEEE802.11p/1609 standard which is commonly known as wireless access in vehicular environment(WAVE). WAVE system transmits signal in 5.835~5.925 GHz frequency band with orthogonal frequency division multiplexing(OFDM) signaling. In this paper, after 32 bit processed the channel monitoring in MAC(Media Access Control) layer of WAVE system implemented according to IEEE 802.11p standard, data were received and we evaluated the performance, we built the test bed consisting of OBU(On Board Unit) in the real expressway. We transmitted WSM(WAVE Short Message) and received WSM between OBU wirelessly. And then, we calculated channel occupancy time per one frame and throughput, and evaluated the performance.

The Design and Implementation of the Mutual Message Processing between WME Module and MLME Module for Vehicle Communication Technology (차량 통신 기술을 위한 WME 모듈과 MLME 모듈 간의 상호 메시지 처리과정 설계 및 구현)

  • Jang, Chung Ryong;Lee, Dae Sik;Lee, Yong Kwon
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.9 no.2
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    • pp.63-71
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    • 2013
  • WAVE(Wireless Access for Vehicular Environment) System is a communication technology to monitor system failure and vehicle functions and management services to prevent possible incidents of driving a vehicle. In this paper, we have designed and implemented the mutual message processing through parameter between WME management module that manages WAVE system and MLME that manages the upper layer MAC(Media Access Control) module. Also, in order to verify the validity, we have carried out experiments to compare the speed of data processing by dividing data of 1Mbyte, 2Mbyte, 3Mbyte into the packets of 2KByte and 4KByte. Experiments data processing speed of 2KByte packet were shown about 173.62ms in 1MByte, 2MByte about 352.61ms, 3MByte about 550.13ms and, data processing speed of 4KByte packet, 1MByte approximately 87.56ms, 2MByte about 177.94ms, 3MByte about 277.18ms. Therefore, in WAVE system, the mutual messages processing through the parameters between WME and MLME module can be utilized in the various service of ITS(Intelligent Transportation Systems) depending on the speed of data processing.

Design and Implementation of an IEEE WAVE Multi-channel Transmission Emulator (IEEE WAVE 멀티채널 전송 에뮬레이터의 설계 및 구현)

  • Lee Woo-Sin;Lee Hyuk-Joon;Lee Sang-Lock;Lee Won-Gi
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.4 no.3 s.8
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    • pp.1-8
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    • 2005
  • IEEE WAVE(Wireless Access in Vehicular Environment) is being developed to operate in 5 GHz DSRC band to provide cars moving at high-speed with vehicle-to-vehicle and vehicle-to-roadside communication. IEEE P 1609.3 of the WAVE protocol stack defines how multiple channels are used based on the exchange of provider-service-tables (PST) and user-service-tables (UST) for rapid link establishment and data transmission. This paper presents the design and implementation of an IEEE WAVE multi-channel transmission emulator that we have developed to study the operation of protocol and applications. Applications for a public-safety and a download service have been implemented and are shown to operate effectively on top of the emulator.

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Frequency Allocation of WAVE for Smart Vehicle Services (주파수 간섭으로 본 스마트 자동차 서비스를 위한 WAVE 주파수 분배 방안)

  • Kim, Seung-Cheon;Rho, Kwang-Hyun;Hwang, Ho-Young;Hong, Jung-Wan
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.49 no.5
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    • pp.1-6
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    • 2012
  • Recent trend of pursuing smart life began to affect the usage of vehicle in real life. The next generation of the smart vehicle services start to utilize telecommunication technology and sensing techniques for the advanced safety and efficient use of road for drivers, while there's still decency in satisfaction about vehicular safety upgrade. For this purpose, a new technology is devised as Wireless Access in Vehicular Environment(WAVE). Foreign industries now are developing technologies of key components, platform and services related to WAVE. Domestic industry just starts to develop the related technologies about WAVE, although the frequency for WAVE is not allocated. This paper introduces the status of technical standards for WAVE and the status of developing components of WAVE. And this paper also proposes the guidance of frequency allocating policy for WAVE through frequency interference experiments.

Symbol Time Tracking Algorithm for WAVE Systems (WAVE 시스템에서 심볼 시간추적 알고리듬)

  • Hong, Dae-Ki
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.13 no.2
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    • pp.397-406
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    • 2009
  • A Wireless Access for Vehicular Environment (WAVE) system based on Orthogonal frequency Division Multiplexing (OFDM) is made for vehicle to vehicle wireless communications. The physical layer standard of the WAVE system is very similar to that of the IEEE802.1la wireless local area network (WLAN). Therefore, the performance of the WAVE system is degraded by continual timing delay in the WAVE multipath fading channels after starting initial timing synchronization. In this paper, the tracking algorithm that synchronizes symbol timing is proposed to continually compensate additional timing delay. Computer simulation of the proposed algorithm is performed in the worst communication environments that apply to maximum timing delay. Computer simulation shows that the proposed algorithm can improve the system performance in various channel conditions.

A Robotcar-based Proof of Concept Model System for Dilemma Zone Decision Support Service (딜레마구간 의사결정 지원 서비스를 위한 로봇카 기반의 개념검증 모형 시스템)

  • Lee, Hyukjoon;Chung, Young-Uk;Lee, Hyungkeun
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.13 no.4
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    • pp.57-62
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    • 2014
  • Recently, research activities to develop services for providing safety information to the drivers in fast moving vehicles based on various wireless network technologies such as DSRC (Dedicated Short Range Communication), IEEE 802.11p WAVE (Wireless Access for Vehicular Environment) are widely being carried out. This paper presents a proof-of-concept model based on a robot-car for Dilemma Zone Decision Assistant Service using the wireless LAN technology. The proposed model system consists of a robot-car based on an embedded Linux OS equipped with a WiFi interface and an on-board unit emulator, an Android-based remote controller to model a human driver interface, a laptop computer to run a model traffic signal controller and signal lights, and a WiFi access point to model a road-side unit.

Design and Implementation of CRL download protocol for supporting of WAVE systems (WAVE 시스템 지원을 위한 CRL 다운로드 프로토콜의 설계 및 구현)

  • Yoo, Kwon-Jeong;Seon, Seol-Hee;Choi, Beom-Jin;Kim, Eun-Gi
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.4
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    • pp.800-806
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    • 2015
  • WAVE(Wireless Access in Vehicular Environments) system is wireless communication technology that vehicle sends and receives packets between vehicles or between vehicles and infrastructure in a high-speed mobile environment. In this study, we have designed and implemented a CRL(Certificate Revocation List) download protocol that is used to verify certificate revocation status of the other party when the vehicles communicate with WAVE system. This protocol operates over UDP. And to support security features, also, ECDSA(Elliptic Curve Digital Signature Algorithm) is used for mutual authentication and ECIES(Elliptic Curve Integrated Encryption Scheme) is used to ensure the confidentiality. Moreover, this protocol ensures the integrity of data by adding MAC(Message Authentication Code) to the end of packet and support the error and flow control mechanisms.