Method and terminal for transmitting and receiving physical uplink data channel mapping information

1. A method of transmitting channel mapping information by a transmission/reception point, the method comprising:

generating physical uplink data channel mapping information of a transmission/reception point different from a serving transmission/reception point of a first user equipment (UE), wherein the first UE belongs to the serving transmission/reception point; and

transmitting the physical uplink data channel mapping information to the first UE such that the first UE performs a physical uplink data channel transmission using the physical uplink data channel mapping information,

wherein the physical uplink data channel transmission includes:

when the physical uplink data channel transmission is not a grant-based uplink transmission,

performing a resource mapping such that a physical uplink data channel resource is mapped to a last SC-FDMA symbol of a sub-frame indicated by a previous uplink grant applied to initial transmission, transmission before retransmission for the initial transmission, or transmission before the retransmission.

2. The method of claim 1 , wherein:

the physical uplink data channel mapping information is a cell-specific Sounding Reference Signal (SRS) parameter of the transmission/reception point including SRS sub-frame configuration information and SRS bandwidth configuration information; and

in the transmitting, the cell-specific SRS parameter of the transmission/reception point is transmitted to the first UE through UE-specific higher layer signaling.

3. The method of claim 1 , wherein:

the physical uplink data channel mapping information is information indicating whether a physical uplink data channel resource is mapped to a last Single-Carrier Frequency-Division Multiple Access (SC-FDMA) symbol of an uplink resource block; and

in the transmitting, the information indicating whether the physical uplink data channel resource is mapped is transmitted through a physical downlink control channel while being included in a Downlink Control Information (DCI) format corresponding to an uplink grant of the transmission/reception point.

4. The method of claim 1 , wherein:

the physical uplink data channel mapping information is one of first information notifying whether the uplink cooperative communication is performed and second information configuring the transmission/reception point as a reception point; and

in the transmitting, the first information and the second information are transmitted through one of higher layer signaling and a physical downlink control channel.

5. The method of claim 4 , wherein the second information configuring the transmission/reception point as a reception point is a virtual cell identity.

6. The method of claim 1 , wherein:

the physical uplink data channel mapping information is a type of Cell Radio-Network Temporary Identifiers (C-RNTIs) used for calculating a Cyclic Redundancy Check (CRC) attached to the DCI corresponding to an uplink grant; and

in the transmitting, a DCI format corresponding to the uplink grant calculated by one of the C-RNTIs is transmitted through a physical downlink control channel.

7. The method of claim 6 , wherein the DCI format corresponding to the uplink grant is a DCI format 4 having a size different from that of other DCI formats.

8. A method of transmitting an uplink data channel by a user equipment (UE), the method comprising:

receiving physical uplink data channel mapping information of a target transmission/reception point from a serving transmission/reception point of the UE, wherein the target transmission/reception point is different from the serving transmission/reception point and the UE belongs to the serving transmission/reception point;

mapping a physical uplink data channel to a wireless resource according to the physical uplink data channel mapping information; and

transmitting the physical uplink data channel mapped to the wireless resource to the target transmission/reception point,

wherein in the mapping, when transmission of the physical uplink data channel is not a grant-based uplink transmission, a physical uplink data channel resource is mapped to a last SC-FDMA symbol of a sub-frame indicated by a previous uplink grant applied to initial transmission, transmission before retransmission for the initial transmission, or transmission before the retransmission.

9. The method of claim 8 , wherein:

the physical uplink data channel mapping information is a cell-specific SRS parameter of the target transmission/reception point including SRS sub-frame configuration information and SRS bandwidth configuration information;

in the receiving, the cell-specific SRS parameter of the target transmission/reception point is received from the serving transmission/reception point through UE-specific higher layer signaling; and

in the mapping, the physical uplink data channel is mapped to the wireless resource on the basis of the cell-specific SRS sub-frame/bandwidth configuration information included in the cell-specific SRS parameter of the target transmission/reception point by applying a physical uplink data channel resource mapping rule.

10. The method of claim 8 , wherein:

the physical uplink data channel mapping information is information indicating whether a physical uplink data channel resource is mapped to a last SC-FDMA symbol of an uplink resource block;

in the receiving, the information indicating whether the physical uplink data channel resource is mapped is received from the serving transmission/reception point through a physical downlink control channel while being included in a DCI format corresponding to an uplink grant of the target transmission/reception point; and

in the mapping, the physical uplink data channel resource is mapped to the last SC-FDMA symbol of a sub-frame indicated by the uplink grant according to a configuration value of the information indicating whether the physical uplink data channel resource included in the DCI format corresponding to the uplink grant is mapped.

11. The method of claim 8 , wherein:

the physical uplink data channel mapping information is one of first information notifying whether the uplink cooperative communication is performed and second information configuring the target transmission/reception point as a reception point;

in the receiving, the first information and the second information are received from the serving transmission/reception point through one of higher layer signaling and a physical downlink control channel; and

in the mapping, the physical uplink data channel resource is mapped to remaining resources except for a last SC-FDMA symbol of all sub-frames.

12. The method of claim 8 , wherein:

the physical uplink data channel mapping information is types of C-RNTIs used for calculating a CRC attached to DCI corresponding to an uplink grant;

in the receiving, a DCI format corresponding to the uplink grant calculated by one of the C-RNTIs is received from the serving transmission/reception point through a physical downlink control channel; and

in the mapping, the physical uplink data channel resource is mapped to a last SC-FDMA symbol of a sub-frame indicated by the uplink grant.

13. The method of claim 12 , wherein the DCI format corresponding to the uplink grant is a DCI format 4 having a size different from that of other DCI formats.

14. A user equipment (UE) for transmitting an uplink data channel, the UE comprising:

a reception unit configured to receive physical uplink data channel mapping information of a target transmission/reception point from a serving transmission/reception point of the UE, wherein the target transmission/reception point is different from the serving transmission/reception point to which the UE itself belongs;

a controller configured to map a physical uplink data channel to a wireless resource according to the physical uplink data channel mapping information; and

a transmission unit configured to transmit the physical uplink data channel mapped to the wireless resource to the target transmission/reception point

wherein the controller is configured to:

when transmission of the physical uplink data channel is not a grant-based uplink transmission,

perform a resource mapping such that a physical uplink data channel resource is mapped to a last SC-FDMA symbol of a sub-frame indicated by a previous uplink grant applied to initial transmission, transmission before retransmission for the initial transmission, or transmission before the retransmission.