• Title, Summary, Keyword: RSU

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Reduced RSU-dependency Authentication Protocol to Enhance Vehicle Privacy in VANET (VANET에서 RSU의 의존성을 줄이고 차량의 프라이버시를 강화한 인증 프로토콜)

  • Rhim, Won-Woo;Kim, Jong-Sik;Kim, Sang-Jin;Oh, Hee-Kuck
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.21 no.6
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    • pp.21-34
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    • 2011
  • VANET offers variety of services to allow safe and comfortable driving through V2V and V2I communications in transportation systems. To use these services, safe and reliable V2V and V2I communications must be guaranteed. In this regards, many RSU-based studies have been carried out to meet certain issues such as: efficiency of frequent communication between RSU and vehicles, security of stored information in RSU, and invasion on vehicle's privacy. In this paper, a scheme is proposed to reduce the dependency on RSU and to enhance the vehicle privacy by using signature-based authentication protocol. The proposed protocol is more efficient than existing protocol with group signature, and satisfies all the requirements of VANET.

A Scheduling Algorithm for Servicing (m,k)-firm-based Request Data from RSU Using in VANETs (VANET내 RSU에서 (m,k)-firm 기반 요청 데이터 처리를 위한 스케쥴링 알고리즘)

  • Nam, Jae-Hyun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.11
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    • pp.2665-2670
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    • 2015
  • VANET is ad-hoc network in which vehicles are treated as node and these nodes are communicating with each other as well as RSUs on the road. In VANET, scheduling is a very important issue as the request data are to be delivered to the recipient vehicle properly and accurately. It is also critical that any request data which is sent to the vehicle is received by it in the time period for which the vehicle will be in range of RSU. RSU picks the one with the highest priority to serve based on the scheduling scheme. In this paper, we propose a scheduling algorithm to select the one with the highest priority in RSU, in which an RSU can transfer the overload requests to other RSUs. We use the modified DBP scheme to calculate the priority of request data. Simulation results show that our scheme outperforms other scheduling schemes under various conditions.

Performance Analysis of RSUs in Probability-Based Data Delivery Strategy for Energy-Constrained V2I Systems (제한된 에너지원을 갖는 V2I 시스템의 확률 기반의 데이터 전달 기법에서 RSU의 성능 분석)

  • Suh, Bongsue
    • 한국정보기술학회논문지
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    • v.16 no.11
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    • pp.69-76
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    • 2018
  • As for V2I(Vehicle-to-Infrastructure) systems with energy-constrained RSUs(Road Side Units), the previous data delivery strategies have not considered the aspect of energy usage at RSUs. A new data delivery strategy has been proposed to determine the RSU's participation in data delivery based on the probability dependent on the RSU's remaining energy, and it showed the lower data delivery time than the previous approaches. In this paper, we propose methods to analyze the number of RSUs participating in data delivery and the variations of RSUs' energy value for the consecutive data deliveries. As a numerical result, compared with the previous strategy, the probability-based data delivery strategy shows the lower number of participating RSUs and the increased average energy value of all RSUs. In addition, from the analytical results, we propose considerations for the real implementations of the similar systems.

Cooperative RSU Scheduling for Efficient Data Dissemination in VANET Environments (VANET 환경에서 효과적인 데이터 배포를 위한 RSU 협업 스케쥴링)

  • Bok, Kyoung Soo;Hong, Seung Wan;Cha, Jae Hog;Lim, Jong Tae;Yoo, Jaesoo
    • The Journal of the Korea Contents Association
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    • v.13 no.10
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    • pp.27-36
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    • 2013
  • Recently, as researches on VANET have actively progressed, the convenient and reliable services can be provided to the vehicles. In this paper, we propose the collaborative RSU scheduling scheme using multiple RSUs which are connected through a wired backbone. The proposed scheme efficiently disseminates both unsafety data and safety data, and reduces the deadline miss rate and the average response time. When safety data is occurred, it is send to previous RSU in advance and is scheduled by deadline and reception rate. We provide the prevention technology for unsafety data when the workload is occurred in RSU because it is on-demand data processed by user requests. It is shown through performance evaluation that the proposed scheme outperforms the existing scheme in terms of the deadline miss rate and the average response time according to the number of vehicles and the velocities of vehicles.

Multiple RSU Scheduling for Disseminating Safety Messages in VANET (VANET 환경에서 안전 데이터 배포를 위한 다중 RSU 스케쥴링)

  • Hong, Seungwan;Cha, Jaehong;Lim, Jongtae;Bok, Kyoungsoo;Yoo, Jaesoo
    • Proceedings of the Korea Contents Association Conference
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    • pp.15-16
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    • 2013
  • VANET에서 다수의 운전자가 요구한 정보 또는 특정 정보를 다수의 사용자에게 전달하기 위해 RSU(Road Side Units)를 사용한다. 본 논문에서는 다수의 RSU를 이용하여 안전 데이터를 효과적으로 전송하기 위한 스케쥴링을 기법을 제안한다. 제안하는 스케쥴링 기법은 RSU의 부하 상태를 파악하고 RSU들 사이에 안전 데이터를 배포할 수 있도록 한다. 또한, 안전 데이터를 이웃한 RSU에 전송하여 안전 데이터 수신율을 향상시킨다.

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An Efficient Anonymous Authentication Protocol Based on Multiple Anonymous Certificates in VANET (VANET에서 다중 익명 인증서 기반 효율적인 익명 인증 프로토콜)

  • Jung, Chae-Duk;Sur, Chul;Park, Young-Ho;Rhee, Kyung-Hyune
    • The KIPS Transactions:PartC
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    • v.16C no.5
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    • pp.589-596
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    • 2009
  • Until now, some protocols have been presented to provide vehicle's anonymity and unlinkability in VANET by means of issuing multiple anonymous certificates to each vehicle from the trust authority, or shot-time anonymous certificate to a vehicle after mutual authentication between a Roadside Unit (RSU) and the vehicle. However, these protocols have high overheads of the trust authority, RSUs and vehicles for generating anonymous certificate. In this paper, we propose an efficient anonymous authentication protocol, in which RSUs can issue multiple shot-time anonymous certificates to a vehicle to alleviate system overheads for mutual authentication between vehicles and RSUs. Several simulations are conducted to verify the efficiency of the proposed protocol in terms of RSU valid serve ratio and vehicle's computational costs. Moreover, the proposed protocol provides unlinkability and traceability when multiple RSUs are compromised, whereas previous protocols do not provide unlinkability and traceability.

A Design of Group Authentication by using ECDH based Group Key on VANET (VANET에서 ECDH 기반 그룹키를 이용한 그룹간 인증 설계)

  • Lee, Byung Kwan;Jung, Yong Sik;Jeong, Eun Hee
    • Journal of the Korea Industrial Information Systems Research
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    • v.17 no.7
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    • pp.51-57
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    • 2012
  • This paper proposes a group key design based on ECDH(Elliptic Curve Diffie Hellman) which guarantees secure V2V and V2I communication. The group key based on ECDH generates the VGK(Vehicular Group key) which is a group key between vehicles, the GGK(Global Group Key) which is a group key between vehicle groups, and the VRGK(Vehicular and RSU Group key) which is a group key between vehicle and RSUs with ECDH algorithm without an AAA server being used. As the VRGK encrypted with RGK(RSU Group Key) is transferred from the current RSU to the next RSU through a secure channel, a perfect forward secret security is provided. In addition, a Sybil attack is detected by checking whether the vehicular that transferred a message is a member of the group with a group key. And the transmission time of messages and the overhead of a server can be reduced because an unnecessary network traffic doesn't happen by means of the secure communication between groups.

Adjustment Strategy of Data Delivery Time Based on RSU's Energy Value in V2I Systems (V2I 시스템에서 RSU 에너지 값에 근거한 데이터 전달 시간 조절 기법)

  • Suh, Bongsue
    • 한국정보기술학회논문지
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    • v.15 no.10
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    • pp.65-71
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    • 2017
  • For V2I(Vehicle-to-Infrastructure) systems with autonomous RSU(Roadside Unit) by energy harvesting, the RSU's transmission distance has a significant effect on its own energy consumption and the data delivery time. In this paper, we propose a data delivery strategy whose data delivery time converges to a target value by having RSUs set their respective transmission distances. According to the proposed strategy, an RSU set its transmission distance based on the difference between the actual value and the target value of data delivery time, and its available energy value, by which vehicle nodes with higher energy value contribute more in reducing data delivery time. Numerical analysis shows that the proposed strategy shows that its data delivery time follows the target value better, and it is more advantageous in respect of energy consumption, compared to the previous method with a fixed transmission distance.

Preventing Communication Disruption in the Urban Environment Using RRPS (RSU Request Priority Scheduling) (도심환경에서 통신 단절 예방을 위한 RRPS(RSU Request Priority Scheduling)설계)

  • Park, Seok-Gyu;Ahn, Heui-Hak;Jeuong, Yi-Na
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.9 no.6
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    • pp.584-590
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    • 2016
  • This paper proposed "Priority Scheduling and MultiPath Routing Protocol (RRPS) for preventing communication disruption in the urban environment" to minimize the disconnection or disruption of V2I and V2V communication in the urban environment where communication is frequently disconnected according to density. The flow of the RRPS is explained as follows. RSU Request Priority Scheduling (RRPS) is used to apply the priority of the request message prior to reaching the end line by using the Start Line and End Line, which are the management areas of the RSU). This paper also proposed MPRP (Multi Path Routing Protocol) design to set up the multipath to the destination. As a result, the proposed RRPS improves the processing efficiency of V2I by applying priority scheduling to the message of the vehicle requesting the information in the RSU, and can prevent the communication disconnection. Thereby, it is improved the transmission success probability.

RSU scheduling method to improve service ratio in vehicle-to-RSU communication (차량과 노변장치의 통신에서 처리율 향상을 위한 전송 스케줄링 방안)

  • Lim, Yeon-Sup;Hwang, Jae-Ryong;Kim, Chong-Kwon
    • Proceedings of the Korean Information Science Society Conference
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    • pp.428-431
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    • 2008
  • Recently, people have been interested in new intelligent transport system (ITS) architecture, so that vehicular networks are becoming an attractive research area. When vehicles try to access data through a roadside unit (RSU), data scheduling of RSU needs to improve service ratio due to limited bandwidth and service time. In this paper, we propose a service scheduling algorithm based on transmission delays and service deadlines of vehicles in order to improve the service ratio. In our algorithm, we assume the promiscuous operation of wireless nodes and it can make a single transmission of RSU serve multiple requests. We evaluated the performance of our scheme via simulations, and results show that our schemes have better performance than existing algorithms.

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