US 9,520,967 B2 · Carrier aggregation acknowledgement bits

Abstract

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.

Claims18

Dependent claims

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.

Dependencies are inferred from the claim text.

Carrier aggregation acknowledgement bits

Life of this patent

Carrier aggregation acknowledgement bits

Life of this patent

Abstract

Claims18