Effective method and device for transmitting control information for supporting uplink multi-antenna transmission
Disclosed is a method for transmitting control information on uplink multi-antenna transmission from a base station and the method includes: transmitting DCI that schedules uplink transmission of a first data block and a second data block through a PDCCH; receiving the first and second data blocks scheduled by the DCI; transmitting information indicating ACK or NACK for the received first and second data blocks, respectively, by using a first PHICH for the first data block and a second PHICH resource for the second data block; receiving a retransmission for a negative-acknowledged data block; and transmitting information indicating ACK or NACK of the retransmission of the negative-acknowledged data block by using the first PHICH resource when the number of negative-acknowledged data blocks is not identical to the number of data blocks that the PDCCH indicates.
1. A method for transmitting control information of uplink (UL) MIMO (Multiple Input Multiple Output) transmission by a base station (BS), the method comprising:
transmitting downlink control information (DCI) scheduling UL transmission of a first transport block (TB) and a second transport block (TB) to a user equipment (UE) through a physical downlink control channel (PDCCH);
receiving the first and second transport blocks (TBs) scheduled by the DCI from the user equipment (UE);
transmitting information indicating acknowledgement (ACK) or negative acknowledgement (NACK) of each of the received first and second transport blocks (TBs) to the user equipment (UE), using a first physical hybrid-automatic repeat request indicator channel (PHICH) resource with respect to the first transport block (TB), and using a second PHICH resource with respect to the second transport block (TB);
receiving retransmission of a negative-acknowledged transport block (NACK TB) from the user equipment (UE); and
transmitting, if the number of NACK transport blocks is different from the number of a plurality of transport blocks indicated by the PDCCH, ACK or NACK indication information for retransmission of the negative-acknowledged transport block (NACK TB) to the user equipment (UE) using the first PHICH resource.
2. The method according to claim 1 , wherein the retransmission is carried out if a PDCCH is not detected in a downlink subframe in which the UE detects the PHICH.
3. The method according to claim 1 , wherein a subframe performing the retransmission at the UE is a fourth subframe starting from a subframe in which the UE receives ACK or NACK indication information of each of the first and second transport blocks.
4. The method according to claim 1 , wherein a subframe in which the UE receives ACK or NACK indication information for the retransmission is a fourth subframe starting from a subframe in which the UE performs retransmission.
5. The method according to claim 1 , wherein the first PHICH resource and the second PHICH resource are distinguished from each other by indices of different frequency domains.
6. A method for performing uplink (UL) MIMO (Multiple Input Multiple Output) transmission by a user equipment (UE), the method comprising:
receiving downlink control information (DCI) scheduling UL transmission of a first transport block (TB) and a second transport block (TB) from a base station (BS) through a physical downlink control channel (PDCCH);
transmitting the first and second transport blocks (TBs) scheduled by the DCI to the base station (BS);
receiving information indicating acknowledgement (ACK) or negative acknowledgement (NACK) of each of the received first and second transport blocks (TBs) from the base station (BS), using a first physical hybrid-automatic repeat request indicator channel (PHICH) resource with respect to the first transport block (TB), and using a second PHICH resource with respect to the second transport block (TB);
transmitting retransmission of a negative-acknowledged transport block (NACK TB) to the base station (BS); and
receiving, if the number of NACK transport blocks is different from the number of a plurality of transport blocks indicated by the PDCCH, ACK or NACK indication information for retransmission of the negative-acknowledged transport block (NACK TB) from the base station (BS) using the first PHICH resource.
7. The method according to claim 6 , wherein the retransmission is carried out if a PDCCH is not detected in a downlink subframe in which the UE detects the PHICH.
8. The method according to claim 6 , wherein a subframe performing the retransmission at the UE is a fourth subframe starting from a subframe in which the UE receives ACK or NACK indication information of each of the first and second transport blocks.
9. The method according to claim 6 , wherein a subframe in which the UE receives ACK or NACK indication information for the retransmission is a fourth subframe starting from a subframe in which the UE performs retransmission.
10. The method according to claim 6 , wherein the first PHICH resource and the second PHICH resource are distinguished from each other by indices of different frequency domains.
11. A base station (BS) for transmitting control information of uplink (UL) MIMO (Multiple Input Multiple Output) transmission comprising:
a reception module for receiving an uplink signal from a user equipment (UE);
a transmission module for transmitting a downlink signal to the user equipment (UE); and
a processor for controlling the base station (BS) including the reception module and the transmission module,
wherein the processor enables the transmission module to transmit downlink control information (DCI) scheduling UL transmission of a first transport block (TB) and a second transport block (TB) to a user equipment (UE) through a physical downlink control channel (PDCCH), enables the reception module to receive the first and second transport blocks (TBs) scheduled by the DCI from the user equipment (UE), enables the transmission module to transmit information indicating acknowledgement (ACK) or negative acknowledgement (NACK) of each of the received first and second transport blocks (TBs) to the user equipment (UE), using a first physical hybrid-automatic repeat request indicator channel (PHICH) resource with respect to the first transport block (TB), and using a second PHICH resource with respect to the second transport block (TB), enables the reception module to receive retransmission of a negative-acknowledged transport block (NACK TB) from the user equipment (UE), and enables the transmission module to transmit, if the number of NACK transport blocks is different from the number of a plurality of transport blocks indicated by the PDCCH, ACK or NACK indication information for retransmission of the negative-acknowledged transport block (NACK TB) to the user equipment (UE) using the first PHICH resource.
12. A user equipment (UE) for performing uplink (UL) MIMO (Multiple Input Multiple Output) transmission comprising:
a reception module for receiving a downlink signal from a base station (BS);
a transmission module for transmitting an uplink signal to the base station (BS); and
a processor for controlling the user equipment (UE) including the reception module and the transmission module,
wherein the processor enables the reception module to receive downlink control information (DCI) scheduling UL transmission of a first transport block (TB) and a second transport block (TB) from a base station (BS) through a physical downlink control channel (PDCCH), enables the transmission module to transmit the first and second transport blocks (TBs) scheduled by the DCI to the base station (BS), enables the reception module to receive information indicating acknowledgement (ACK) or negative acknowledgement (NACK) of each of the received first and second transport blocks (TBs) from the base station (BS), using a first physical hybrid-automatic repeat request indicator channel (PHICH) resource with respect to the first transport block (TB), and using a second PHICH resource with respect to the second transport block (TB), enables the transmission module to transmit retransmission of a negative-acknowledged transport block (NACK TB) to the base station (BS), and enables the reception module to receive, if the number of NACK transport blocks is different from the number of a plurality of transport blocks indicated by the PDCCH, ACK or NACK indication information for retransmission of the negative-acknowledged transport block (NACK TB) from the base station (BS) using the first PHICH resource.