Analysis of Vulnerable Road User Awareness Message Generation Rules for Pedelecs

Vehicle-to-X communication is increasingly focusing on vulnerable road users. A large group of vulnerable road users are pedelecs. In Vehicle-to-X communication, message generation rules play an important role. These rules can strongly influence the number of messages and the safety. This paper provides an overview of the current Vulnerable Road User Awareness Message generation rules and their impact based on a real pedelec data set. It also evaluates the importance of the rules and the frequency of message generation. All analyses are performed on data sets with different sample rates in order to get an overview of the impact of the sample rate. The results of this paper show that different sample rates lead to significant differences in the impact of the generation rules and also on the message generation frequency. Also a suggestion of a minimum sample rate for recording the sensor data of pedelecs is done. The importance of the different generation rules is measured with the help of an information loss metric. The loss of information caused by ignoring a rule varies significantly among the different rules. This loss also depends on the sample rate. Overall, this paper shows the current state of the generation rules, the different importance of each rule and a suggestion for a minimal sample rate.