作为交通系统重要组成部分的车联网,目前面临用户量巨大且信息频繁交换的现象.传统的4G-LTE网络系统的接入多采用正交多址接入技术(Orthogonal Frequency Division Multiple Access,OFDMA),资源利用率较低.5G 车联网引入了稀疏码多址接入技术(Sparse Code Multiple Access,SCMA).SCMA技术是非正交多址接入技术的一种,可通过高容量、大规模连接等方式使 5G无线传输更高效,若将其应用到车联网技术上,能更有效地提升车联网的资源利用率以及信号抗干扰能力.文章就SCMA技术在5G车联网中的应用展开研究.
Application of SCMA in 5G vehicle networking
As an important component of the transportation system,the Internet of Vehicles(IoV)is currently facing the phenomenon of a huge number of users and frequent information exchange.The traditional 4G-LTE network system often uses Orthogonal Frequency Division Multiple Access(OFDMA)technology for access,resulting in low resource utilization;The 5G vehicle networking has introduced Sparse Code Multiple Access(SCMA)technology,which is a type of non-orthogonal multiple access technology.It makes 5G wireless transmission more efficient through high capacity,large-scale connections,and other methods.If applied to vehicle networking technology,it can more effectively improve the resource utilization and signal anti-interference ability of the vehicle networking.This article analyzes the application of SCMA technology in 5G vehicle networking.