Analysis of Resource Allocation Overheads Considering CSI and Traffic Models for Vehicular Ad Hoc Network

In recent years, the overhead arising from allocating resources in vehicular ad hoc network (VANET) has become a crucial problem to be solved. Since 3GPP has introduced channel state information (CSI) report into NR V2X services and specified the traffic model for simulation evaluation. This paper proposes a more comprehensive permutation model considering the channel state and traffic demand volume of vehicle nodes on the basis of our previous study where the resource allocation patterns are not treated differently or in a CSI/traffic-agnostic manner. In our model, the vehicle node with better channel status would have higher priority to compete for radio resources, and it can only share resource elements with the nodes requesting the same amount of resource elements. In this manner, the overhead caused by resource allocation in VANET could be decreased. The effectiveness is verified by simulations in TDMA and cluster-based VANET schemes, respectively, which indicates that the model proposed in this paper can be used as an optimization guide for obtaining better performance gains.