Multi-relay Selection Strategy For Interference-limited In VANET

In recent years,with the rapid development in the automotive industry,electronic communications,computers,and other fields,the Intelligent Transportation System(ITS)is in an unprecedented period of vigorous development.The Vehicular Ad-Hoc Networks(VANETs)technology is an important part of ITS,and Gradually become a research hotspot.The complex mobility of the Vehicle and limited coverage of Vehicle and Access Point(AP),affects the direct communication between vehicle and AP.The adoption of Relay Vehicles(RVs)can solve this communication problem by relaying the message between the Source Vehicle(SV)and AP.At the same time,the existence of co-channel Interference(CCI)will affect the choice of RV.The implementation of system optimization and selection of optimal RVs from a group of multiple potential RVs,to ensure user communication needs,has become an important research topic of VANET.Aiming at the existence of CCI in SV's communication with AP via RV,Therefore,with the channel model set up,I have proposed a relay vehicle selection strategy,based on vehicle node communication and named it as,“Relay Selection Schemes in Interference Limited VANET”(RSSILV).With full consideration to the influence of CCI,the strategies according to the interference term on the instantaneous end-to-end link SNR,are divided into three parts,i-e.;1)In the high SNR scenario,Asymptotic Relay Selection Schemes(ARSS),2)In the middle SNR scenario,Semi-Asymptotic Relay Selection Schemes(SARSS),3)In low SNR scenarios,Conventional Relay Selection Schemes(CRSS).All three strategies are able to optimize the system's outage probability and Bit Error Rate(BER)within its application.To achieve the required outage probability,based on the RSSILV strategy,the Cooperative Mutil-Relay Selection In interference Limited VANET(CMRSILV)strategy is proposed with the expansion of the optimal single relay into multiple relays.This strategy is divided into three parts: 1)In the high SNR scenario,Asymptotic Mutil-Relay Selection Schemes(AMRSS),2)In the middle SNR scenario,Semi-Asymptotic Mutil-Relay Selection Schemes(SAMRSS)and 3)In low SNR scenarios,Conventional Mutil-Relay Selection Schemes(CMRSS).The CMRSSILV strategy optimizes the performance of the cooperative communication system and improves the robustness of the overall network system with feedback error in the selection process of the relay vehicle...