Channel State Information Report Coefficients for Wireless Systems

The patent divides the full codebook into multiple subcodebooks, each corresponding to different channel conditions or spatial regions. The UE selects only the relevant subcodebook based on current channel state, thereby reducing the effective codebook size while maintaining comprehensive channel coverage. This segmentation allows the system to achieve full codebook accuracy when needed while operating with reduced complexity in typical scenarios.

The patent implements partial codebook usage by enabling the UE to report channel state information using only a subset of codebook entries based on channel conditions, spatial filters, or configuration parameters. This partial action approach maintains sufficient measurement precision for practical purposes while significantly reducing the codebook size and associated device complexity compared to using the complete codebook for all reporting instances.

The patent applies local quality by configuring different numbers of CSI-RS ports for different spatial regions, frequency bands, or channel conditions. Instead of uniformly using maximum ports across all scenarios, the system optimizes the number of ports locally according to specific channel characteristics, user equipment positions, and traffic requirements. This approach maintains high measurement precision where needed while reducing reference signal overhead in scenarios with fewer requirements.

The patent implements partial port usage by enabling the UE to perform channel estimation and reporting using only a subset of available CSI-RS ports based on configuration, channel conditions, and reporting requirements. This partial action allows the system to achieve sufficient channel estimation accuracy for practical communication needs while significantly reducing the energy consumption and overhead associated with using all available ports in every scenario.

The patent segments the large codebook into multiple specialized subcodebooks, each optimized for specific channel conditions, spatial configurations, or service types. The UE selects the appropriate subcodebook based on current channel state, thereby achieving comprehensive adaptability across diverse scenarios while reducing the amount of feedback required in any given instance. This segmentation maintains full codebook versatility while improving productivity through selective usage.

The patent enables partial codebook reporting where the UE provides channel state information using only the necessary subset of codebook entries relevant to current channel conditions and service requirements. This partial action approach maintains sufficient adaptability to handle various channel scenarios while significantly reducing feedback overhead compared to reporting all codebook parameters in every situation, thereby improving overall system productivity.