Abstract
In this article, we propose a resource allocation (RA) scheme for vehicular communication networks (VCNs). The proposed scheme exploits the spectral efficiency of full-duplex (FD) communications to fulfill the reliability constraints of vehicle-to-vehicle (V2V) links and the high capacity requirements of vehicle-to-infrastructure (V2I) links. Also, it is capable of coping with the fast variations of the channels due to the high mobility. Based on the links requirements, the RA problem is formulated as a non-convex problem, which is solved in two steps. First, the optimal power allocation (PA) is obtained by solving a system of linear equations. Second, the channel assignment (CA), which turns out to be a maximum weight bipartite matching problem, is solved using the Hungarian method. Also, a heuristic hybrid scheme, which combines the proposed FD scheme and the half-duplex (HD) scheme that optimally finds the RA, is proposed. Compared to the optimal HD-based scheme, simulation results show that the proposed FD scheme always offers higher sum of the V2I links' capacities except for the case in which V2V links require low transmission rates, while the hybrid scheme ensures higher performance for all potential cases.
Highlights
Vehicular communication networks (VCNs) have attracted a lot of attention due to their ability to improve road safety and traffic control as well as support advanced infotainment applications [1]
It is designed based on the large-scale fading parameters and statistical information of the small-scale fading of the V2V links to avoid the overhead of frequent reporting of the channel state information (CSI) to the base stations (BSs)
We assume that the BS has the large-scale information of all links that depend on the vehicles locations and that are characterized by a slow rate of change
Summary
Vehicular communication networks (VCNs) have attracted a lot of attention due to their ability to improve road safety and traffic control as well as support advanced infotainment applications [1]. Traffic safety applications of V2V links entail high communication reliability, while infotainment applications of V2I links necessitate high data capacity [1], [5] Another important difference between resource allocation (RA) for LTE cellular networks and that for VCNs is that the RA schemes proposed for the former (e.g., [6], [7]) traditionally depend on the acquisition of full channel state information (CSI). The proposed scheme considers the nature of the VCN channels and QoS requirements of the V2I and V2V links It is designed based on the large-scale fading parameters and statistical information of the small-scale fading of the V2V links to avoid the overhead of frequent reporting of the CSIs to the BS.
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