According to some embodiments, there may be two options for update of transmission parameters for a CG, i.e., a gNB based option and a UE based option. In the gNB based option, transmission parameters (e.g., MCS, RI, PMI, sounding reference signal index (SRI), etc.) can be indicated in the configured grant-downlink feedback information (CG-DFI). For this option, the DCI signaling overhead is not much affected since the gNB anyway needs to provide hybrid automatic repeat request acknowledgement/negative acknowledgement (HARQ A/N) in the CG-DFI signaling. In the UE based option, a UE can indicate some transmission parameters (e.g., MCS, PMI, RI, SRI, etc.) in the configured grant-uplink control information (CG-UCI) to improve transmission efficiency. For either of the two options, direct inclusion of transmission parameters in UCI or DFI may increase the signaling overhead. On the other hand, in the case that a UE or a gNB receives an update of transmission parameters, there may be a need for the UE or the gNB to confirm reception of the updated parameters and apply these parameters accordingly.

In order to reduce signaling overhead for update of transmission parameters and improve the resource efficiency of a communication network, various exemplary embodiments of the present disclosure propose a transmission adaptation solution for UL transmission (such as PUSCH transmission) with a CG. The proposed solution can enable an update of transmission parameters to be indicated by a signaling message such as DFI/DCI/UCI in an efficient fashion, so as to reduce the signaling overhead in the DFI/DCI/UCI with improved resource utilization. In addition, the proposed solution can enable the UE/gNB to confirm reception of the update of transmission parameters and apply the updated parameters accordingly, without significantly increasing processing complexity.