With the rapid development of intelligent transportation systems,sidelink communication technology for cellular vehicle-to-everything(C-V2X)has become the key technology to enable vehicle-to-vehicle,vehicle-to-infrastructure,and vehicle-to-pedestrian communications.3rd Generation Partnership Project(3GPP)has finished re-search on sidelink communication technology enhancement,aiming to meet the diverse needs of V2X services,and is actively advancing research and standardization on 6G evolution technologies such as integrated sensing and commu-nication(ISAC),artificial intelligence and machine learning(AI/ML).The development trends of sidelink communi-cation technology in C-V2X were firstly introduced.Then,the key evolution points of 3GPP Release 18 sidelink com-munication technology were discussed.Finally,considering the research on 6G technology in 3GPP Release 19,a per-spective on the standard future development direction of C-V2X was provided.
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