Terminal Device Uplink Control Information Feedback DCI Handling

The patent applies the inversion principle by reversing the traditional feedback mechanism. Instead of the terminal device independently determining which channel group to feedback based on received DCI messages, the base station explicitly indicates the target channel group through a specific field in the DCI message. This inversion of control authority eliminates the inconsistency between base station and terminal device understandings, ensuring that both parties agree on which channel group requires feedback while maintaining the ability to trigger multiple feedback transmissions within the same time unit.

The patent implements a feedback mechanism where the base station sends DCI messages containing an explicit indication of the target channel group for feedback. The terminal device receives this indication and sends feedback information for the specified channel group. The base station then uses the same indication to correctly identify and interpret the incoming feedback information. This closed-loop feedback mechanism ensures that both parties maintain consistent understanding of which channel group the feedback pertains to, preventing information loss while preserving feedback channel flexibility.

The patent changes the parameter of DCI message structure by adding an explicit indication field that specifies the target channel group for feedback. This parameter change transforms the feedback determination process from an autonomous terminal device decision to a base station-controlled indication. The terminal device simply follows the indication provided in the DCI message, maintaining ease of operation through simplified device logic while significantly improving uplink control information transmission performance by eliminating inconsistencies in feedback channel group determination.