Carrier aggregation acknowledgement bits

摘要

Systems, methods, and user equipment can involve transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) bits for carrier aggregation between a first cell and a second cell in a User Equipment (UE). With the UE, for a sub-frame, a first number of ACK/NACK bits for the first cell can be compared with a second number of ACK/NACK bits for the second cell. If a first number of ACK/NACK bits for the first cell is less than a second number of ACK/NACK bits for the second cell, an ACK/NACK bit position from the first cell can be used to transmit an ACK/NACK bit for the second cell. In some implementations, one or more DTX bits can be used to set the number of ACK/NACK bits in the first cell equal to the number of ACK/NACK bits in the second cell.

主权项

1. A method for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) bits for carrier aggregation between a first cell and a second cell by a User Equipment (UE), the method comprising:
reordering ACK/NACK bit positions of at least one of an ACK/NACK bit position for the first cell or an ACK/NACK bit position of the second cell, wherein the reordering comprises:
transmitting a last ACK/NACK bit for the second cell using a bit position of one of a last ACK/NACK bit or a next to last ACK/NACK bit for the first cell, the last ACK/NACK bit for the first cell corresponds to a sub-frame on the first cell that is transmitted last to the UE, and the next to last ACK/NACK bit for the first cell corresponds to a sub-frame that is transmitted immediately prior to the sub-frame on the first cell that is transmitted last to the UE.