Evaluation of Channel Congestion for V2V Safety Communication in Multiplatooning Applications

The applications related to cooperative automated driving need to share periodic safety information with neighboring vehicles in a reliable and low-latency manner. However, the performance of vehicular ad-hoc technologies degrades substantially when the channel becomes congested. Therefore, this paper presents a channel congestion evaluation method for V2V safety communication for the IEEE 802.11p protocol. The evaluation addresses multiplatooning applications, in which the vehicles' density is a defining element. To illustrate the negative effects of the channel load level, a number of relevant performance metrics were analyzed, such as Channel Busy Ratio (CBR), Packet Loss Rate (PLR), and Inter-Packet Delay (IPD).