NOMA-based Internet of Vehicles resource allocation method

Abstract

According to the NOMA-based Internet of Vehicles resource allocation method provided by the invention, the access capability of the network can be effectively improved, and the total transmission rateof all users is significantly improved. According to the method, firstly, a clustering concept is introduced, users are merged into clusters by a base station according to geographic positions of VUEusers, and the users in the same cluster can share the same spectrum resource. Then, in order to reduce the co-channel interference of the CUE and the V2V; CUE users and a VUE user cluster sharing the same spectrum resource are determined by adopting a Hungary algorithm, finally, the suboptimal transmitting power of each V2V sender in the VUE user cluster is obtained by adopting particle swarm optimization iterative optimization on the non-convex problem in the VUE user cluster, and the corresponding suboptimal VUE throughput is calculated. According to the method, the NOMA is applied to theV2V unicast users in communication between vehicles, the total throughput of the V2V users reaches the maximum value on the basis of ensuring the service quality of V2I and V2V communication, and a new thought is provided for the V2X resource allocation problem under the NOMA.

Description

technical field [0001] The invention relates to a NOMA-based resource allocation method for the Internet of Vehicles, and belongs to the technical field of wireless resource allocation for the Internet of Vehicles. Background technique [0002] In recent years, non-orthogonal multiple access technology (NOMA) has become a research hotspot to further improve spectrum utilization. The NOMA technology was first proposed in 2014. Its purpose is to make more efficient use of spectrum resources under the premise of satisfying user quality of service (QoS), and to provide a theoretical basis for the future deployment of smaller cells. Different from traditional orthogonal transmission, NOMA uses non-orthogonal transmission at the sending end, actively introduces interference information, and realizes correct demodulation through serial interference cancellation technology at the receiving end. Compared with orthogonal transmission, the receiver complexity is increased, but higher ...

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Problems solved by technology

However, its research is still insufficient. The resource allocation schemes in the existing literature rarely introduce NOMA for resource allocation in the 5G Internet of Vehicles scenario. How to jointly consider the perception and resource allocation requirements caused by the high-speed movement of vehicles is a current research issue.

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