Resource indexing for acknowledgement signals in response to receptions of multiple assignments
User Equipment (UE) transmits an acknowledgement signal in response to the reception of multiple Scheduling Assignments (SAs) transmitted by a base station. The SAs consist of Information Elements (IEs) including a Transmission Power Control (TPC) IE providing adjustments for the transmission power of the acknowledgement signal. The TPC IE in a first SA of the multiple SAs is used to provide the previous adjustments and the TPC IEs in the remaining of the multiple SAs are used to provide an indication of the resource used for the transmission of the acknowledgment signal.
1. A method for transmitting, by user equipment, a hybrid automatic repeat request acknowledgement (HARQ-ACK) in a communication system supporting multiple cells, the method comprising:
identifying power of the HARQ-ACK based on transmission power control information in first downlink control information corresponding to a primary cell;
identifying a resource for transmission of the HARQ-ACK based on the transmission power control information in second downlink control information corresponding to a secondary cell; and
transmitting the HARQ-ACK based on the resource on the primary cell.
2. The method of claim 1 , wherein the transmission power control information in the second downlink control information corresponding to the secondary cell indicates the resource for transmission of the HARQ-ACK from a set of resources for transmission of the HARQ-ACK configured by a base station.
3. The method of claim 2 , wherein the user equipment assumes that a same resource for transmission of the HARQ-ACK is transmitted in each second downlink control information corresponding to secondary cells.
4. The method of claim 1 , wherein HARQ-ACK bits for all cells are jointly coded.
5. The method of claim 1 , wherein the identified resource for transmission of the HARQ-ACK is used for resource selection.
6. An apparatus of user equipment for transmitting a hybrid automatic repeat request acknowledgement (HARQ-ACK) in a communication system supporting multiple cells, comprising:
a controller for identifying power of the HARQ-ACK based on transmission power control information in first downlink control information corresponding to a primary cell, and identifying a resource for transmission of the HARQ-ACK based on the transmission power control information in second downlink control information corresponding to a secondary cell; and
a transmitter for transmitting the HARQ-ACK based on the resource on the primary cell.
7. The apparatus of claim 6 , wherein the transmission power control information in the second downlink control information corresponding to the secondary cell indicates a resource for transmission of the HARQ-ACK from a set of resources for transmission of the HARQ-ACK configured by a base station.
8. The apparatus of claim 7 , wherein the user equipment assumes that a same resource for transmission of the HARQ-ACK is transmitted in each second downlink control information corresponding to secondary cells.
9. The apparatus of claim 6 , wherein HARQ-ACK bits for all cells are jointly coded.
10. The apparatus of claim 6 , wherein the identified resource for transmission of the HARQ-ACK is used for resource selection.
11. A method for receiving, by a base station, a hybrid automatic repeat request acknowledgement (HARQ-ACK) in a communication system supporting multiple cells, the method comprising:
transmitting power control information in first downlink control information corresponding to a primary cell for a transmission power of the HARQ-ACK;
transmitting transmission power control information in second downlink control information corresponding to a secondary cell for a resource for transmission of the HARQ-ACK; and
receiving the HARQ-ACK based on the resource on the primary cell.
12. The method of claim 11 , wherein the transmission power control information in the second downlink control information corresponding to a secondary cell indicates a resource for transmission of the HARQ-ACK from a set of resources for transmission of the HARQ-ACK configured by the base station.
13. The method of claim 12 , wherein the base station indicates a same resource for transmission of the HARQ-ACK in each second downlink control information corresponding to secondary cells.
14. The method of claim 11 , wherein HARQ-ACK bits for all cells are jointly coded.
15. The method of claim 11 , wherein the resource for transmission of the HARQ-ACK is used for resource selection.
16. An apparatus of a base station for receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) in a communication system supporting multiple cells, comprising:
a transmitter for transmitting power control information in first downlink control information corresponding to a primary cell for a transmission power of the HARQ-ACK, transmitting transmission power control information in second downlink control information corresponding to a secondary cell for a resource for transmission of the HARQ-ACK; and
a receiver for receiving the HARQ-ACK based on the resource on the primary cell.
17. The apparatus of claim 16 , wherein the transmission power control information in the second downlink control information corresponding to a secondary cell indicates a resource for transmission of the HARQ-ACK from a set of resources for transmission of the HARQ-ACK configured by the base station.
18. The apparatus of claim 17 , further comprising a controller for indicating a same resource for transmission of the HARQ-ACK in each second downlink control information corresponding to secondary cells.
19. The apparatus of claim 16 , wherein HARQ-ACK bits for all cells are jointly coded.
20. The apparatus of claim 16 , wherein the resource for transmission of the HARQ-ACK is used for resource selection.