V2X spectrum allocation scheme based on D2D communication with imperfect CSI
QUAN Shixin
SUN Zhiguo
SUN Rongchen
LIU Liu
Abstract：In Vehicle to Everything-Device to Device(V2X-D2D)communication scenarios,the rapid time-variation of channels often prevent the Base Station(BS)from acquiring perfect Channel State Information(CSI).To address the limitations that the existing spectrum allocation schemes are not applicable to V2X-D2D scenarios,considering constraints such as Vehicle-to-Vehicle(V2V)link reliability,maximum transmission power,and spectrum reuse,a scenario model and communication model for V2X scenarios are established.This study specifies the optimization objective of maximizing the ergodic capacity of Vehicle-to-Infrastructure(V2I)links while ensuring V2V link reliability.Closed-form expressions are derived for the outage probability of V2V links and the ergodic capacity of V2I links,accounting for the effects of channel time-variations.For spectrum allocation in one-to-one mode,a fast spectrum allocation scheme based on the improved Hungarian algorithm is proposed.For one-to-many mode,a spectrum allocation scheme based on graph coloring and preference lists is developed.Simulation results show that the improved Hungarian algorithm-based scheme achieves higher access rates and lower complexity compared to existing algorithms,while the graph coloring-preference list scheme offers superior access rates and spectrum utilization.
Keywords：wireless communicationVehicle to Everything(V2X)Device to Device(D2D)spectrum allocationimperfect Channel State Information(CSI)
Publication Date：2024-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 30-38 )