Method and apparatus for transmitting and receiving signals in wireless communication system
View Patent ↗An apparatus and a method for allocating resources for transmitting an HARQ ACK/NACK signal for a downlink subframe using a PUCCH format 3 in a time division duplex (TDD) system using a single carrier are provided. Since the resources are allocated through a resource indicator transmitted using a power control field transmitted on a PDCCH of the downlink subframe, the resources for transmitting the HARQ ACK/NACK signal may be allocated by effectively using resources allocated to a duplicately transferred control signal.
1. A method for transmitting control information of a base station in a time division duplex (TDD) system, the method comprising:
configuring a first transmit power control (TPC) command for controlling a physical uplink control channel (PUCCH) transmission power and a second TPC command which indicates resources for the PUCCH in an uplink (UL) subframe; and
performing a transmission of a first physical downlink control channel (PDCCH) including the first TPC command in a first downlink (DL) subframe and a transmission of a second PDCCH including the second TPC command in a second DL subframe, wherein the first and the second DL subframes correspond to the UL subframe; and
performing a transmission of physical downlink shared channels (PDSCHs) in the first and the second DL subframes,
wherein the transmission of the PDSCHs in the first and the second DL subframes and a reception of the PUCCH in the UL subframe are performed on a single carrier.
2. The method of claim 1 , wherein the second TPC command indicates a resource to be used for the PUCCH among allocated resources by higher layer signaling.
3. The method of claim 1 , wherein the second TPC command is configured to indicate resources for the PUCCH in format 3.
4. The method of claim 1 , wherein, if the number of DL subframes with PDSCH corresponding to the UL subframe is one, a PUCCH in formats 1a/1b is used for the UL subframe.
5. A method for transmitting a physical uplink control channel (PUCCH) of a user equipment in a time division duplex (TDD) system, the method comprising:
receiving, in a first downlink (DL) subframe, a first physical downlink control channel (PDCCH) including a first transmit power control (TPC) command for controlling the PUCCH transmission power;
receiving, in a second DL subframe, a second PDCCH including a second TPC command which indicates resources for the PUCCH in an uplink (UL) subframe, wherein the first and the second DL subframes correspond to the UL subframe; and
receiving, in the first and the second DL subframes, physical downlink shared channels (PDSCHs),
wherein the reception of the PDSCHs in the first and the second DL subframes and a transmission of the PUCCH in the UL subframe are performed on a single carrier.
6. The method of claim 5 , wherein the second TPC command indicates a resource to be used for the PUCCH among allocated resources by higher layer signaling.
7. The method of claim 5 , wherein the second TPC command is configured to indicate resources for the PUCCH in format 3.
8. The method of claim 5 , wherein, if the number of DL subframes with PDSCH corresponding to the UL subframe is one, a PUCCH in formats 1a/1b is used for the UL subframe.
9. An apparatus to transmit control information in a time division duplex (TDD) system, the apparatus comprising:
a controlling unit to configure a first transmit power control (TPC) command for controlling a physical uplink control channel (PUCCH) transmission power;
a resource allocating unit to configure a second TPC command which indicates resources for the PUCCH in an uplink (UL) subframe;
a transceiving unit to perform a transmission of a first physical downlink control channel (PDCCH) including the first TPC command in a first downlink (DL) subframe, to perform a transmission of a second PDCCH including the second TPC command in a second DL subframe, and to perform a transmission of physical downlink shared channels (PDSCHs) in the first and the second DL subframes, wherein the first and the second DL subframes correspond to the UL subframe; and
a format determining unit to determine a format of the PUCCH,
wherein the transmission of the PDSCHs in the first and the second DL subframes and a reception of the PUCCH in the UL subframe are performed on a single carrier.
10. The apparatus of claim 9 , wherein the second TPC command indicates a resource to be used for the PUCCH among allocated resources by higher layer signaling.
11. The apparatus of claim 9 , wherein the format determining unit determines that the format of the PUCCH as format 3, and the second TPC command is configured to indicate resources for the PUCCH in format 3.
12. The apparatus of claim 9 , wherein the format determining unit determines that the PUCCH format is PUCCH formats 1a/1b when only a single of the DL subframe with PDSCH corresponds to the UL subframe.
13. An apparatus to transmit a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/not-acknowledgement (NACK) signal in a time division duplex (TDD) system using a single carrier, the apparatus comprising:
a transceiving unit to receive, in a first downlink (DL) subframe, a first physical downlink control channel (PDCCH) including a first transmit power control (TPC) command for controlling a physical uplink control channel (PUCCH) transmission power, to receive, in a second DL subframe, a second PDCCH including a second TPC command which indicates resources for the PUCCH in an uplink (UL) subframe, and to receive, in the first and the second DL subframes, physical downlink shared channels (PDSCHs), wherein the first and the second DL subframes correspond to the UL subframe,
a resource determining unit to determine resources used to transmit the PUCCH in the UL subframe; and
a controlling unit to control a transmission of the UL subframe,
wherein the reception of the PDSCHs in the first and the second DL subframes and a transmission of the PUCCH in the UL subframe are performed on a single carrier.
14. The apparatus of claim 13 , wherein the second TPC command indicates a resource to be used for the PUCCH among allocated resources by higher layer signaling.
15. The apparatus of claim 13 , wherein the second TPC command is configured to indicate resources for the PUCCH in format 3.
16. The apparatus of claim 13 , wherein, if the number of DL subframes with PDSCH corresponding to the UL subframe is one, a PUCCH in formats 1a/1b is used for the UL subframe.