PUSCH TCI State Determination for SDM and SFN Transmission

The patent segments the TCI state determination process by introducing different determination methods for different transmission modes. For spatial division multiplexing, it uses a first determination method based on spatial relationship information, while for single frequency network, it uses a second determination method based on downlink control information. This segmentation allows each method to be optimized for its specific transmission mode, achieving versatility without excessive complexity.

The patent implements dynamic adaptability by enabling the terminal to dynamically select between different TCI state determination methods based on the transmission mode. The network can flexibly configure the transmission mode through RRC signaling, and the terminal adapts its TCI state determination approach accordingly, making the system dynamically responsive to different transmission requirements.

The patent achieves universality by designing a unified TCI state determination framework that can handle multiple transmission modes (time division multiplexing, spatial division multiplexing, and single frequency network) through a common architecture. The framework uses universal concepts like spatial relationship information and downlink control information that can be applied across different transmission modes, allowing the system to support multiple functions without proportionally increasing complexity.

The patent utilizes parameter changes by introducing specific RRC parameters (e.g., spath-ToAddModList, sfn-ToAddModList) and DCI fields that encode transmission mode information. By changing these parameters and their interpretations based on transmission mode, the system can efficiently support different transmission modes with enhanced resource utilization while managing complexity through standardized parameter structures.