Manabu Tsukada

The University of Tokyo

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Hiroshi Esaki

The University of Tokyo

Jin Nakazato

The University of Tokyo

Ehsan Javanmardi

Nanjing University of Aeronautics and Astronautics

Thierry Ernst

Institut national de recherche en informatique et en automatique

Hideya Ochiai

The University of Tokyo

Pengfei Lin

The University of Tokyo

José Santa

Universidad Politécnica de Cartagena

Kazutoshi Fujikawa

Nara Institute of Science and Technology

Pengfei Lin

Fuzhou University

Muhammad Asad

Huazhong Agricultural University

Cooperative Institutions

The University of Tokyo

Institut national de recherche en informatique et en automatique

Keio University

Nara Institute of Science and Technology

Hokkaido University

Osaka University

Tokyo Institute of Technology

Nagoya University

Centre National de la Recherche Scientifique

ITS (United Kingdom)

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Iterative Resolution with IPv6 Packets Failing

Momoka Yamamoto Jin Nakazato Manabu Tsukada Hiroshi Esaki

The exhaustion of IPv4 addresses has driven the rapid adoption of IPv6 networks, which has created challenges in the domain name resolution process, particularly for IPv6-only iterative resolvers. This paper presents an experimental analysis to quantify the extent of this problem, revealing a significantly lower success rate of name resolution using IPv6-only resolvers (64.1%) compared to IPv4-only resolvers (98.8%). By analysing the success rates and percentages of A and AAAA records for the top 1,000,000 domains in the Tranco list, we identify the limitations of IPv6-only iterative resolvers and highlight the urgent need for comprehensive solutions to improve DNS resolution in IPv6-only networks. Our findings emphasise the importance of full IPv6 adoption for improved compatibility in IPv6-only environments, and serve as a basis for addressing the challenges faced by IPv6-only networks.

IPv4

10.1109/icccn58024.2023.10230170

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Citations (2)

Misbehavior Detection Using Collective Perception under Privacy Considerations

Manabu Tsukada Shimpei Arii Hideya Ochiai Hiroshi Esaki

In cooperative ITS, security and privacy protection are essential. Cooperative Awareness Message (CAM) is a basic V2V message standard, and misbehavior detection is critical for protection against attacking CAMs from the inside system, in addition to node authentication by Public Key Infrastructure (PKI). On the contrary, pseudonym IDs, which have been introduced to protect privacy from tracking, make it challenging to perform misbehavior detection. In this study, we improve the performance of misbehavior detection using observation data of other vehicles. This is referred to as collective perception message (CPM), which is becoming the new standard in European countries. We have experimented using realistic traffic scenarios and succeeded in reducing the rate of rejecting valid CAMs (false positive) by approximately 15 percentage points while maintaining the rate of correctly detecting attacks (true positive).

Pseudonym

10.1109/ccnc49033.2022.9700564

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Citations (7)

Application of IPv6 multicast to VANET

Yacine Kha Inès Ben Jemaa Manabu Tsukada Thierry Ernst

Vehicular networks (VANET) attract a lot of attention in the research world. Novel vehicular applications need suitable communication mechanisms to extend in-vehicle capabilities and, be aware about surrounding events. However, these networks present some characteristics, such as high mobility or specific topologies. These properties affect the performances of applications and more effort should be directed to identify the final network requirements. One of the most important challenges is the availability of an appropriate addressing mechanism to transmit information to vehicles in a target area. In this scope, the multicast mechanism with IPv6 is considered as a suitable and appropriate solution for those applications. Thus, in this paper, we study and analyze the possibilities for integrating IPv6 multicast mechanism in VANET context. We particularly propose to encode GPS coordinates into the IPv6 multicast address and to use digital map in order to map multicast addresses to dedicated areas.

IPv6 address

Scope (computer science)

10.1109/itst.2009.5399356

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Citations (10)

Basic and Advanced features of IPv6 Over C2C NET

Manabu Tsukada K. Yacine Thierry Ernst

The GeoNet project will significantly contribute to vehicle communication by implementing a reference specification of a geographic addressing and routing protocol with support for IPv6 to be used to deliver safety messages between cars but also between cars and the roadside infrastructure within a designated destination area. Geographic addressing and routing is a networking mechanism distributing the information to nodes within a designated destination area. A novel routing protocol (C2C NET) is in charge of information dissemination over multiple hops until every vehicle has received this information within the destination area. This document mentions about basic and advanced features of IPv6 over C2C NET. First, we discover the missing features in current specification of C2C NET and shows some solutions. Second, specification of IPv6 over C2C NET are described and implementation example is investigated in Linux system. Third, we propose advance features such as route optimization, multihoming and simultaneous utilization of NEMO and C2C NET V2V mode.

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The Role of Communication Technologies in Vehicular Applications

IGI Global eBooks (2010)

Yacine Khaled Manabu Tsukada José Santa Thierry Ernst

Vehicular networks attract a lot of attention in the research world. Novel vehicular applications need a suitable communication channel in order to extend in-vehicle capabilities and, be aware of surrounding events. However, these networks present some peculiarities, such as high mobility or specific topologies. These features affect the performance of applications; hence, more effort should be directed to identify the final necessities of the network. Few works deal with application requirements that should be considered when vehicular services are designed. In this chapter this gap is filled, proposing an analysis of application requirements mapped with suitable communication technologies for physical/MAC and network layers. This study contains key factors that must be taken into account not only at the design stage of the vehicular network, but also when applications are evaluated.

10.4018/978-1-61520-913-2.ch003

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Citations (2)

Location-Based Broad-Range Null-Steering in V2X Multiuser MIMO Transmission

Yuki Sasaki Sojin Ozawa Kabuto Arai Jin Nakazato Manabu Tsukada

This paper proposes an intensive null-steering around the target in angular domain to effectively suppress inter-user interference (IUI) leakage caused by channel varying environment such as vehicular multiuser spatial multiplexing. Multiuser MIMO can enhance spectral efficiency by multiplexing a number of user terminals in spatial domain. Suppose applying multiuser MIMO downlink in vehicle-to-everything (V2X) scenario, vehicles move at high speed which causes IUI. Null-space expansion has been conceived that can improve IUI suppression capability by steering nulls to the past and the present channel states on interfered users. Collective perception in intelligent transport systems (ITS) provides location information of vehicles every 100 ms. Exploiting this feature, this paper proposes angular-domain null-space expansion; broad-range null-steering (BRNS). Computer simulation verifies its effectiveness.

Null (SQL)

10.1109/ccnc51664.2024.10454730

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Citations (3)

New Results - Communications Management inCooperative Intelligent Transportation Systems

Thierry Ernst Manabu Tsukada

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Citations (0)

A Rule-Compliance Path Planner for Lane-Merge Scenarios Based on Responsibility-Sensitive Safety

2022 17th International Conference on Control, Automation, Robotics and Vision (ICARCV) (2024)

Pengfei Lin Ehsan Javanmardi Yuze Jiang Manabu Tsukada