Uplink DCI Bit Allocation for Multi-TRP Transmission Switching

The patent changes the parameter of information field bit numbers by introducing configurable bit width parameters (e.g., 2-bit or 3-bit fields) that can be dynamically adjusted based on the transmission scheme being used. This allows the DCI format to adapt its information field size to match the specific transmission scheme requirements, thereby supporting multiple schemes while controlling blind detection complexity through parameter configuration.

The patent introduces dynamic switching mechanisms where the terminal device can dynamically determine which transmission scheme is being used and accordingly interpret the DCI information fields. The network device can dynamically select different transmission schemes and configure the corresponding DCI formats, enabling flexible adaptation between single-TRP, multi-TRP, single-panel, and multi-panel schemes without requiring the terminal to perform exhaustive blind detection across all possible schemes.

The patent designs a universal DCI format that can serve multiple transmission schemes through configurable information fields. The same DCI structure can indicate single-TRP, multi-TRP, single-panel, or multi-panel schemes by varying the interpretation of certain fields based on configuration parameters. This multi-functional design reduces the need for separate dedicated DCI formats for each scheme, thereby reducing overall configuration complexity while maintaining transmission adaptability.

The patent introduces indication fields as intermediaries that mediate between the network device's transmission scheme selection and the terminal device's interpretation of DCI. These indication fields (such as SRI field, TPMI field, or dedicated transmission scheme indication fields) serve as intermediaries that carry the necessary information to switch between schemes without requiring complex reconfiguration of the entire DCI structure, thereby simplifying the switching mechanism.

The patent applies preliminary action by having the network device pre-configure transmission scheme parameters and DCI format settings before actual uplink transmission. The terminal device receives and stores these configurations in advance, so that when DCI is received, both devices already have consistent expectations about the information field bit numbers and interpretations. This pre-synchronization eliminates the need for complex real-time blind detection and ensures reliable interpretation without increasing detection difficulty.

The patent incorporates feedback mechanisms where the terminal device reports its capability and configuration status to the network device, and the network device adjusts DCI formatting accordingly. This feedback loop ensures that both devices maintain consistent understanding of the DCI information fields, with the network device adapting its transmissions based on terminal feedback, thereby ensuring reliability without requiring the terminal to perform difficult blind detection.