IRS-Assisted Multi-Hop V2V Link Selection in mmWave Vehicular Networks
Multi-hop Vehicle-to-Vehicle(V2V)communication can effectively improve connectivity and network coverage in mmWave vehicular networks,at the expense of delay overhead.An Intelligent Reflecting Surface(IRS)can provide reflection gain to compensate for the high path loss in long-distance transmission,thus increasing the single-hop transmission distance and reducing the number of hops.Utilizing IRS in multi-hop V2V communication,can reduce the number of forwarding hops and latency overhead.To address the problem of ignoring resource and signal conflicts among vehicles often manifested by existing link selection mechanisms,in this study,a link selection mechanism based on Forwarding Efficiency and Spatial reuse Time Division Multiple Access(FE-STDMA)is proposed for IRS-assisted multi-hop V2V in mmWave vehicular networks.This mechanism evaluates the forwarding efficiency of candidate links by integrating the forwarding distance,link quality,and transmission time.The candidate link selection adopts spatial reuse to enable concurrent transmissions.Time division multiple access is used to alleviate resource conflict problems and maximize the utilization of network resources.Simulation results show that the multi-hop delay of the FE-STDMA mechanism is reduced by an average of 49.88%compared to that of the Nearest with Forward Progress(NFP)mechanism,and the delivery ratio is increased by an average of 11.11%compared to that of the NFP mechanism,which is much higher than those of the Most Forward with Fixed Radius(MFR)and the Random Forward with Progress(RFP)mechanisms.Compared to these widely adopted link selection mechanisms,the FE-STDMA mechanism can significantly improve the multi-hop delay while ensuring the delivery ratio.
国家科技期刊平台
NSTL
万方数据
维普
