Use Case Validation of Safety Support Utilizing High Priority Communication
動画引用元論文
Use Case Validation of Safety Support Utilizing High Priority Communication
- 著 者
- Takahiro Kurehashi, Yakumo Fujimoto
- 収 録
- 31st ITS World Congress 2025, Atlanta, Georgia, USA
- 発 行
- August, 2025
- 要 旨
- With the recent proliferation of mobile devices, research on V2N-based safety support using mobile communications has been attracting attention. However, since mobile communication is for commercial use, congestion occurs when many users use it. Congestion causes high communication latency, which affects the provision of safety support. Therefore, we applied high priority communication technology, which enables high priority communication by changing the priority of communication via an API, to a safety support system. In this study, the effectiveness of high priority communication for safety support was verified by reproducing congestion conditions and verifying the proposed system in actual vehicles. An introduction of the proposed system and the results of the verification are presented.
Speaker
呉橋 崇弘 / Takahiro Kurehashi
その他 執筆論文（共著含む）
Research on Safety Support Systems Utilizing Communication Terminals and Infrastructural Cameras
- 著 者
- Takahiro Kurehashi, Moriya Horiuchi, Yuta Sakagawa, Hideo Kadowaki
- 収 録
- 30th ITS World Congress, Dubai, UAE
- 発 行
- 2024/9
- 要 旨
- This research aims to realize a society in which everyone who uses the roads can move freely and safely. Although the number of traffic accidents has been decreasing in recent years, traffic accidents involving pedestrians have not yet been eradicated and remain a problem. In particular, accidents involving pedestrians jumping out of the road due to sudden changes in behavior are scenes that are difficult to deal with using conventional preventive safety functions provided by advanced driver assistance systems. Therefore, this study proposes a system employing communications to notify road users of risks from the potential risk stage. We constructed a system that aggregates each road user's location from communication terminals and infrastructure cameras to a server via mobile communication, assesses the risk, and notifies each road user. The system proposal and verification results using an actual vehicle are presented below.
Research on V2X Communication System to Reduce Pedestrian Accidents
- 著 者
- Moriya Horiuchi, Shigeru Inoue, Takahiro Kurehashi, Takashi Oshima, Yuta Sakagawa Yosuke Komiyama, Koichi Serizawa
- 収 録
- 27th International Technical Conference on the Enhanced Safety of Vehicles (ESV)
- 発 行
- 2023/4
- 要 旨
- Everyone deserves to feel safe on the road. The goal is to strive for zero traffic collision fatalities involving motorcycles and automobiles globally by 2050. Many traffic fatalities are categorized as vulnerable road users such as pedestrians and cyclists. In particular, pedestrian fatalities account for the largest portion. Pedestrian accidents have occurred not only through drivers’ errors but through pedestrians' errors. Thus, in addition to advanced driver-assistance systems, safety behavior by pedestrians is effective for reducing pedestrian accidents. Research was therefore conducted on the vehicle-to-everything (V2X) communication system connecting vehicles and pedestrians to assist both drivers and pedestrians. The system used 5G standalone mobile communication system and a cellular-V2X communication system. With an in-vehicle camera, the system detected a pedestrian walking across a street ahead and in an area that is in a blind spot for the driver. Then, the total time required for the pedestrian to receive notification after detection by the in-vehicle camera was estimated. Also, the reactions of pedestrians were observed, and the time required for pedestrians to react to notification was measured as well. The result in the assumed use case was that the system promoted safety behavior by supporting drivers and pedestrians before collision occurred. However, considering the reaction time of pedestrians, assisting system users before collision is a challenge if the time to the collision is extremely short. Therefore, the system is required to notify the users in plenty of time before the collision. In order to utilize the system, it is desired to promote widespread adoption by installing the system on smartphones rather than on dedicated equipment. Also, the accuracy of location ascertained using smartphone needs to be improved to establish acceptability. Horiuchi 2 The safe use of communication technologies was considered as one of the one-step-ahead integrated vehicle safety technologies. This report details the structure, results, and issues of the V2X communication system.