Analysis of Resource Allocation Overheads in Vehicle Ad Hoc Network Considering CSI

The problem of overheads caused by resource allocation in vehicle ad hoc network (VANET) has become an issue attracting more and more attention. Recently, 3GPP has introduced channel state information (CSI) report into NR V2X as a new and important technical feature. Therefore, by considering the channel state of the vehicle nodes, this paper proposes an improved permutation model based on our previous work where the overheads related to channel state were not treated in a differentiated manner. It is assumed that the nodes in good channel state would have priority to occupy resources first, while the nodes in bad channel state are not allowed to participate in resource allocation, and the CSIs representing bad channel state are assumed to be compressed or saved. In this way, the overheads of resource allocation in VANET can be reduced, thus leading to the potential performance improvement of the overall system. This result is verified by simulation experiments, which show the proposed model may work as a better optimizing guideline for achieving good performance gain.