Vehicle-to-Everything(V2X)communication is expected to accomplish a long-standing goal of the Connected and Autonomous Vehicle(CAV)community to bring connected vehicles to roads on a large scale.A major challenge,and ...Vehicle-to-Everything(V2X)communication is expected to accomplish a long-standing goal of the Connected and Autonomous Vehicle(CAV)community to bring connected vehicles to roads on a large scale.A major challenge,and perhaps the biggest hurdle on the path towards this goal,is the scalability issues associated with it,especially when vehicular safety is concerned.As a major stakeholder,Cellular V2X(C-V2X)community,which is based on the 3rd Generation Partnership Project(3GPP),has long been trying to research on whether vehicular networks are able to support the safety-critical applications in high-density vehicular scenarios.This paper attempts to answer this question by first presenting an overview on the scalability challenges faced by 3GPP Release 14 Long Term Evolution C-V2X(LTE-V2X)using the PC5 sidelink interface for low and heavy-density traffic scenarios.Next,it demonstrates a series of solutions that address network congestion,packet losses,and other scalability issues associated with LTE-V2X to enable this communication technology for commercial deployment.In addition,a brief survey is provided into 3GPP Release 165G New Radio V2X(NR-V2X)that utilizes the NR sidelink interface and works as an evolution of C-V2X towards better performance for V2X communications,including new enhanced V2X(eV2X)scenarios that possess ultra-low-latency and high-reliability requirements.展开更多
文摘Vehicle-to-Everything(V2X)communication is expected to accomplish a long-standing goal of the Connected and Autonomous Vehicle(CAV)community to bring connected vehicles to roads on a large scale.A major challenge,and perhaps the biggest hurdle on the path towards this goal,is the scalability issues associated with it,especially when vehicular safety is concerned.As a major stakeholder,Cellular V2X(C-V2X)community,which is based on the 3rd Generation Partnership Project(3GPP),has long been trying to research on whether vehicular networks are able to support the safety-critical applications in high-density vehicular scenarios.This paper attempts to answer this question by first presenting an overview on the scalability challenges faced by 3GPP Release 14 Long Term Evolution C-V2X(LTE-V2X)using the PC5 sidelink interface for low and heavy-density traffic scenarios.Next,it demonstrates a series of solutions that address network congestion,packet losses,and other scalability issues associated with LTE-V2X to enable this communication technology for commercial deployment.In addition,a brief survey is provided into 3GPP Release 165G New Radio V2X(NR-V2X)that utilizes the NR sidelink interface and works as an evolution of C-V2X towards better performance for V2X communications,including new enhanced V2X(eV2X)scenarios that possess ultra-low-latency and high-reliability requirements.
