5G Resource A Llocation Technology For Vehicle-to-Vehicle Communication

Cellular Vehicle-to-Everything(C-V2X)technology based on the cellular communication system can realize information sharing and collaborative control between vehicle networks,thereby improving road safety and traffic efficiency.Among them,vehicle-to-vehicle(V2V)communication is one of the important communication modes in C-V2X,which can meet the communication needs of vehicles when the cellular network coverage is discontinuous.At present,V2V communication mainly uses the sensing-based semi-persistent scheduling(SPS)resource scheduling method.However,this scheduling method is mainly designed for periodic V2V services,and it is difficult to meet the delay and reliability requirements under the coexistence of a large number of periodic and aperiodic V2V services in the fifth-generation mobile communication system(5G)cellular Vehicle-to-Everything.Therefore,it is urgent to carry out research on resource allocation technologies for V2V basic application scenarios where traffic changes slowly and V2V enhanced application scenarios where traffic changes rapidly.The main research contents and innovations of this article include:1.Aiming at the problem of V2V communication resource allocation in the scenario of slow traffic changes,this paper studies the orthogonal resource allocation technology of V2V communication.For periodic services,a resource allocation method based on resource sensing and priority preemption mechanism is proposed.The proposed method can achieve different periodic V2V service delay and reliability requirements by dividing resource preemption for V2V services with higher priority in the resource pool.For aperiodic services,a resource allocation method based on control information decoding and collision avoidance mechanisms is proposed.By decoding the sidelink control information,this method enables aperiodic services to reserve resources according to the resource pool occupancy,thereby avoiding conflicts between aperiodic services and effectively improving the reliability of aperiodic V2V service transmission.Simulation results show that when multiple V2V services are transmitted based on orthogonal resource pools,the two proposed algorithms are superior to existing resource allocation algorithms,and the gain of service transmission reliability can reach more than 5%.2.Aiming at the problem of V2V communication resource allocation in the scenario of rapid traffic changes,this paper studies the shared resource allocation technology of V2V communication,and proposes a general resource allocation method based on long-term sensing and fast sensing.First,the vehicle obtains the resource reservation status of the periodic and aperiodic V2V services in the resource pool through long-term sensing and fast sensing of the resource pool occupancy situation,and then performs conflict avoidance and resource reservation based on the perceived information.This method can achieve the purpose of reducing resource conflicts between aperiodic services and periodic services while avoiding resource conflicts between aperiodic services in the shared resource pool.Simulation results show that compared with existing resource allocation algorithms,the proposed algorithm has obvious performance advantages in the transmission of multiple V2V service shared resource pools,and the overall system transmission reliability gain can reach more than 4%.The above research results not only provide support for the theory and technologies for the standardization of 5G cellular Vehicle-to-Everything resource allocation,but also provide necessary networking performance support and reference for the operation and deployment of 5G cellular Vehicle-to-Everything.