Distributed Unit Sidelink Resource Allocation in 5G CU-DU Architecture

The patent segments the base station into two functional units: CU (Central Unit) and DU (Distributed Unit). The CU handles high-layer control functions including RRC, PDCP, and RLC layers, while the DU handles physical layer functions and radio resource management. This segmentation allows centralized resource allocation decisions to be made at the CU level while distributing execution to multiple DU instances, thereby maintaining control reliability while reducing overall system complexity and enabling flexible deployment scenarios.

The patent designs the CU-DU separated architecture with universal interfaces and standardized protocols that enable the same resource allocation mechanism to function across multiple deployment scenarios. The CU maintains a unified view of resources and can allocate SL resources regardless of whether the DU is co-located or distributed, supporting both centralized and distributed deployment modes through the same F1 interface framework, thereby achieving deployment scenario adaptability while maintaining allocation simplicity.