CSI-Based NOMA User Scheduling and Codebook Allocation

The patent segments the codebook allocation process by dividing the complete codebook into multiple sub-codebooks, each associated with specific user equipment. This segmentation allows the base station to manage multiple users more efficiently by processing codebook allocations in smaller, manageable groups rather than handling all users simultaneously, thereby reducing overall scheduling complexity while maintaining high data rates.

The patent implements preliminary actions by pre-configuring multiple codebooks at the base station before actual data transmission occurs. These pre-configured codebooks are prepared in advance and stored, allowing the base station to quickly select and allocate appropriate codebooks during scheduling without performing complex calculations in real-time, thus reducing computational burden while maintaining high spectral efficiency.

The patent applies local quality by assigning different codebooks to different user equipments based on their specific channel conditions and requirements. Each user receives a codebook tailored to their local characteristics rather than using a uniform codebook for all users. This differentiation allows multiple users to transmit simultaneously on the same frequency resources while minimizing mutual interference through codebook-specific signal characteristics.

The patent introduces codebooks as intermediary structures that mediate between multiple user equipments sharing the same frequency resources. The codebooks act as a organizing framework that structures the signals from different users, enabling simultaneous transmission while maintaining signal separation. The base station uses these intermediary codebooks to manage and coordinate multiple users' transmissions, reducing interference through systematic signal organization.