Banani Sam, Gordon Steven, Thiemjarus Surapa, Kittipiyakul Somsak
School of Information, Computer, and Communication Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12000, Thailand.
School of Engineering and Technology, CQUniversity, Cairns QLD 4870, Australia.
Sensors (Basel). 2018 Apr 13;18(4):1195. doi: 10.3390/s18041195.
In high-density road networks, with each vehicle broadcasting multiple messages per second, the arrival rate of safety messages can easily exceed the rate at which digital signatures can be verified. Since not all messages can be verified, algorithms for selecting which messages to verify are required to ensure that each vehicle receives appropriate awareness about neighbouring vehicles. This paper presents a novel scheme to select important safety messages for verification in vehicular ad hoc networks (VANETs). The proposed scheme uses location and direction of the sender, as well as proximity and relative-time between vehicles, to reduce the number of irrelevant messages verified (i.e., messages from vehicles that are unlikely to cause an accident). Compared with other existing schemes, the analysis results show that the proposed scheme can verify messages from nearby vehicles with lower inter-message delay and reduced packet loss and thus provides high level of awareness of the nearby vehicles.
在高密度道路网络中，每辆车每秒会广播多条消息，安全消息的到达速率很容易超过数字签名的验证速率。由于并非所有消息都能得到验证，因此需要用于选择要验证哪些消息的算法，以确保每辆车都能获得有关相邻车辆的适当感知信息。本文提出了一种新颖的方案，用于在车载自组织网络（VANETs）中选择重要的安全消息进行验证。该方案利用发送方的位置和方向，以及车辆之间的接近度和相对时间，来减少被验证的无关消息数量（即来自不太可能引发事故的车辆的消息）。与其他现有方案相比，分析结果表明，该方案能够以更低的消息间延迟和更低的数据包丢失率验证来自附近车辆的消息，从而提供对附近车辆的高度感知。
