Determination of HRA-QK response codebook in wireless communication system

摘要

An apparatus, method, and system for determining a hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook are disclosed. An apparatus includes a processor and a memory that stores code executable by the processor. In various embodiments, the code determines the aggregated set of serving cells. The code groups the aggregated serving cells into a set of cell groups. In a further embodiment, the code determines, for an uplink subframe, a set of subframes for which a corresponding HARQ-ACK is to be transmitted in the uplink subframe. The code receives a cell-domain downlink allocation indicator and a cell-domain total allocation indicator in each downlink control information scheduling a physical downlink shared channel. The code additionally determines the HARQ-ACK codebook for each combination of cell group and subframe. The apparatus may include a transmitter to receive downlink control information.