Abstract
The cellular vehicle-to-everything (C-V2X) is an important information technology solution to address the low-latency and high-reliability communication demands of current vehicle users in beyond 5th generation (B5G) and 6th generation (6G) wireless communications. However, existing C-V2X frameworks suffer from frequent handovers, insufficient data rates, and imbalanced base station loads due to the smaller coverage range of base stations. To address these challenges, it becomes imperative to introduce uplink/downlink decoupled access (DUDe) into the preexisting coupled access framework. This article analyzes the core challenges of C-V2X, summarizes the development background and advantages of DUDe, examines the feasibility of applying DUDe in C-V2X, explores various application directions related to uplink/downlink decoupled access C-V2X, and finally concludes with the development of uplink/downlink decoupled access C-V2X.
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