Method for transmitting control information and apparatus for same
A wireless communication system is disclosed. A method for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in TDD includes: generating a first HARQ-ACK (hybrid automatic repeat request-acknowledgement) set for a first cell using a value M; generating a second HARQ-ACK set for a second cell using the value M; and transmitting a bit value corresponding to a third HARQ-ACK set including the first HARQ-ACK set and the second HARQ-ACK set in an uplink subframe n, wherein M=max(M1, M2), max(M1, M2) representing a value being equal to or larger than not smaller between M1 and M2, wherein M1 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the first cell, and M2 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the second cell, wherein the first cell and the second cell have different UL-DL configurations.
1. A method for transmitting by a user equipment (UE) uplink control information in a wireless communication system operating in a time division duplex (TDD) and supporting carrier aggregation of a plurality of cells including a first cell and a second cell, the method comprising:
based on the first cell and the second cell having different uplink-downlink (UL-DL) configurations, determining a value M as a largest value of M1 or M2, M1 being a value according to an UL-DL configuration of the first cell and M2 being a value according to an UL-DL configuration of the second cell;
obtaining hybrid automatic repeat request-acknowledgment (HARQ-ACK) responses for the first cell and the second cell using the value M; and
transmitting at least one bit value corresponding to the obtained HARQ-ACK responses in an uplink subframe.
2. The method according to claim 1 , wherein the value M is determined by M=max(M1, M2), max(M1, M2) indicating the largest value of M1 or M2.
3. The method according to claim 1 , wherein:
M1 corresponds to a number of downlink subframes corresponding to the uplink subframe in the first cell, and
M2 corresponds to a number of downlink subframes corresponding to the uplink subframe in the second cell.
4. The method according to claim 1 , wherein the first cell is a primary cell (PCell) and the second cell is a secondary cell (SCell).
5. The method according to claim 1 , wherein, based on M being greater than M1, (M−M1) HARQ-ACK responses for the first cell are set to discontinuous transmissions (DTX).
6. The method according to claim 1 , wherein, based on M being greater than M2, (M−M2) HARQ-ACK responses for the second cell are set to discontinuous transmissions (DTX).
7. The method according to claim 1 , wherein the at least one bit value is transmitted via a physical uplink control channel (PUCCH) using a specific PUCCH resource corresponding to the obtained HARQ-ACK responses from among a plurality of PUCCH resources.
8. The method according to claim 1 , wherein the at least one bit value is transmitted via a physical uplink shared channel (PUSCH).
9. A communication device configured to transmit uplink control information in a wireless communication system operating in a time division duplex (TDD) and supporting carrier aggregation of a plurality of cells including a first cell and a second cell, the communication device comprising:
a radio frequency (RF) transceiver; and
a processor configured to:
based on the first cell and the second cell having different uplink-downlink (UL-DL) configurations, determine a value M as a largest value of M1 or M2, M1 being a value according to an UL-DL configuration of the first cell and M2 being a value according to an UL-DL configuration of the second cell,
obtain hybrid automatic repeat request-acknowledgment (HARQ-ACK) responses for the first cell and the second cell using the value M, and
transmit at least one bit value corresponding to the obtained HARQ-ACK responses in an uplink subframe.
10. The communication device according to claim 9 , wherein the value M is determined by M=max(M1, M2), max(M1, M2) indicating the largest value of M1 or M2.
11. The communication device according to claim 9 , wherein:
M1 corresponds to a number of downlink subframes corresponding to the uplink subframe in the first cell, and
M2 corresponds to a number of downlink subframes corresponding to the uplink subframe in the second cell.
12. The communication device according to claim 9 , wherein the first cell is a primary cell (PCell) and the second cell is a secondary cell (SCell).
13. The communication device according to claim 9 , wherein, based on M being greater than M1, (M−M1) HARQ-ACK responses for the first cell are set to discontinuous transmissions (DTX).
14. The communication device according to claim 9 , wherein, based on M being greater than M2, (M−M2) HARQ-ACK responses for the second cell are set to discontinuous transmissions (DTX).
15. The communication device according to claim 9 , wherein the at least one bit value is transmitted via a physical uplink control channel (PUCCH) using a specific PUCCH resource corresponding to the HARQ-ACK responses from among a plurality of PUCCH resources.
16. The communication device according to claim 9 , wherein the at least one bit value is transmitted via a physical uplink shared channel (PUSCH).