Research On Distributed Resource Selection And Relay Transmission Scheme Based On NR-V

The radio resource selection in vehicular-to-vehicular(V2V)communication is essential because the Vehicle User Equipment(VUE)has to select the appropriate resource block to send the information under the broadcast scenario.When buildings obscure the V2V link,it will bring the problem of the hidden station,which means the transmitters may use the same radio resource as the hidden station,affecting the correct reception ratio of the data packet.To solve this problem,this paper proposes the base station-assisted information acquisition mechanism and two steps exclusion of occupied resources mechanism.In this mechanism,the base station collects part of the Sidelink Control Information(SCI)that the VUE cannot receive correctly and transmits it to the VUE.So that the VUE can obtain more SCI and exclude resources more comprehensively that improves the resource allocation performance.The simulation results show that the success rate of V2V communication can be improved by using our base station assistance mechanism.At the same time,this paper also proposes the mechanism of information transmission using power control and relaying.The VUE estimates the channel quality according to the SCI information and received signal strength of other VUEs received within a certain range and performs power control based on this.Power control is used to reduce the interference of the VUE on the communication channel between other VUEs.At the same time,the relay VUE is used to combine the data packets in different directions and forward them,which reduces the occupation of wireless resources and convert the non-line-of-sight(NLOS)link into the line-of-sight(LOS)link.So that the correct rate of data packet transmission between VUEs has been improved.The simulation results show that the mechanism of information transmission using power control and relaying can effectively improve the accuracy of V2V communication.