Method for transmitting control information and apparatus therefor
A method for transmitting uplink control information by a user equipment (UE) configured with a plurality of cells including a primary cell and a secondary cell in a wireless communication system is discussed. The method includes identifying, by the UE, a Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK)(0) and a HARQ-ACK(1); and transmitting, by the UE, bits b(0)b(1) using a Physical Uplink Control Channel (PUCCH) resource among a plurality of PUCCH resources based on the HARQ-ACK(0) and the HARQ-ACK(1) to a base station (BS) for identifying the HARQ-ACK(0) and the HARQ-ACK(1). The b(0)b(1) and the PUCCH resource are given according to a relation including Table 1, where the HARQ-ACK(0) indicates an ACK/Negative ACK (ACK/NACK)/Discontinuous Transmission (DTX) response to a data block related to the primary cell, and the HARQ-ACK(1) indicates an ACK/NACK/DTX response to a data block related to the secondary cell.
1. A method for transmitting uplink control information by a user equipment (UE) configured with a plurality of cells including a primary cell and a secondary cell in a wireless communication system, the method comprising:
identifying, by the UE, a Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK)(0) and a HARQ-ACK(1); and
transmitting, by the UE, bits b(0)b(1) using a Physical Uplink Control Channel (PUCCH) resource based on the HARQ-ACK(0) and the HARQ-ACK(1), according to a relation including Table 1,
TABLE 1
HARQ-ACK(0)
HARQ-ACK(1)
n (1) PUCCH, i
b(0)b(1)
ACK
NACK/DTX
n (1) PUCCH, 0
11
NACK
NACK/DTX
n (1) PUCCH, 0
00,
where the HARQ-ACK(0) indicates an ACK/Negative ACK (ACK/NACK)/Discontinuous Transmission (DTX) response to a data block related to the primary cell, the HARQ-ACK(1) indicates an ACK/NACK/DTX response to a data block related to the secondary cell, and n (1) PUCCH, 0 indicates a PUCCH resource linked to a Physical Downlink Control Channel (PDCCH) on the primary cell.
2. The method of claim 1 , wherein no transmission is performed if the HARQ-ACK(0) is DTX and the HARQ-ACK(1) is NACK.
3. The method of claim 1 , wherein the primary cell includes a primary component carrier (PCC) and the secondary cell includes a secondary component carrier (SCC).
4. A user equipment (UE) configured to have a plurality of cells including a primary cell and a secondary cell and transmit uplink control information in a wireless communication system, the UE comprising:
a radio frequency (RF) unit; and
a processor operatively coupled to the RF unit and configured to:
identify a Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK)(0) and a HARQ-ACK(1), and
transmit bits b(0)b(1) using a Physical Uplink Control Channel (PUCCH) resource based on the HARQ-ACK(0) and the HARQ-ACK(1), according to a relation including Table 1:
TABLE 1
HARQ-ACK(0)
HARQ-ACK(1)
n (1) PUCCH, i
b(0)b(1)
ACK
NACK/DTX
n (1) PUCCH, 0
11
NACK
NACK/DTX
n (1) PUCCH, 0
00,
where the HARQ-ACK(0) indicates an ACK/Negative ACK (ACK/NACK)/Discontinuous Transmission (DTX) response to a data block related to the primary cell, the HARQ-ACK(1) indicates an ACK/NACK/DTX response to a data block related to the secondary cell, and n (1) PUCCH, 0 indicates a PUCCH resource linked to a Physical Downlink Control Channel (PDCCH) on the primary cell.
5. The UE of claim 4 , wherein no transmission is performed if the HARQ-ACK(0) is DTX and the HARQ-ACK(1) is NACK.
6. The UE of claim 4 , wherein the primary cell includes a primary component carrier (PCC) and the secondary cell includes a secondary component carrier (SCC).
7. A method for receiving uplink control information by a base station (BS) configured with a plurality of cells including a primary cell and a secondary cell in a wireless communication system, the method comprising:
receiving, by the BS, bits b(0)b(1) using a Physical Uplink Control Channel (PUCCH) resource; and
identifying, by the BS, a Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK)(0) and a HARQ-ACK(1) based on the bits b(0)b(1) and the PUCCH resource, according to a relation including Table 1,
TABLE 1
HARQ-ACK(0)
HARQ-ACK(1)
n (1) PUCCH, i
b(0)b(1)
ACK
NACK/DTX
n (1) PUCCH, 0
11
NACK
NACK/DTX
n (1) PUCCH, 0
00,
where the HARQ-ACK(0) indicates an ACK/Negative ACK (ACK/NACK)/Discontinuous Transmission (DTX) response to a data block related to the primary cell, the HARQ-ACK(1) indicates an ACK/NACK/DTX response to a data block related to the secondary cell, and n (1) PUCCH, 0 indicates a PUCCH resource linked to a Physical Downlink Control Channel (PDCCH) on the primary cell.
8. The method of claim 7 , wherein the primary cell includes a primary component carrier (PCC) and the secondary cell includes a secondary component carrier (SCC).
9. A base station (BS) configured to have a plurality of cells including a primary cell and a secondary cell and receive uplink control information in a wireless communication system, the BS comprising:
a radio frequency (RF) unit; and
a processor operatively coupled to the RF unit and configured to:
receive bits b(0)b(1) using a Physical Uplink Control Channel (PUCCH) resource, and
identify a Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK)(0) and a HARQ-ACK(1) based on the bits b(0)b(1) and the PUCCH resource, according to a relation including Table 1:
TABLE 1
HARQ-ACK(0)
HARQ-ACK(1)
n (1) PUCCH, i
b(0)b(1)
ACK
NACK/DTX
n (1) PUCCH, 0
11
NACK
NACK/DTX
n (1) PUCCH, 0
00,
where the HARQ-ACK(0) indicates an ACK/Negative ACK (ACK/NACK)/Discontinuous Transmission (DTX) response to a data block related to the primary cell, the HARQ-ACK(1) indicates an ACK/NACK/DTX response to a data block related to the secondary cell, and n (1) PUCCH, 0 indicates a PUCCH resource linked to a Physical Downlink Control Channel (PDCCH) on the primary cell.
10. The BS of claim 9 , wherein the primary cell includes a primary component carrier (PCC) and the secondary cell includes a secondary component carrier (SCC).