Method for transmitting and receiving data in a wireless communication system and apparatus therefor
Disclosed herein are a method and a device for transmitting and receiving uplink data in a wireless communication system. According to the present disclosure, a UE may transmit to a base station information related to a capability of the UE and the information may include a subset including at least one transmit precoding matrix indicator (TPMI) supported by the UE. The UE may receive Downlink Control Information (DCI) for transmitting the uplink data from the base station and the DCI may include a TPMI used for the UE to transmit the uplink data. Thereafter, the UE may transmit to the base station the uplink data by using transmission power determined based on the TPMI and the transmission power may be determined according to whether the TPMI is included in the at least one TPMI.
1. A method performed by a User Equipment (UE) in a wireless communication system, the method comprising:
transmitting, to a base station, capability information,
wherein the capability information includes information for a transmit precoding matrix indicator (TPMI) group, supported by the UE, which delivers full transmission power, and
wherein, among precoding matrices for single layer transmission using 4 antenna ports based on TPMI indices 0 to 27, the TPMI group includes a precoding matrix comprising a single column containing at least one ‘0’;
receiving, from the base station, configuration information related to a Physical Uplink Shared Channel (PUSCH); and
receiving, from the base station, Downlink Control Information (DCI) for scheduling of the PUSCH,
wherein the DCI includes a field for precoding information and number of layers; and
transmitting, to the base station, the PUSCH based on a precoding matrix related to a TPMI index based on the field,
wherein, based on the precoding matrix related to the TPMI index being the precoding matrix in the TPMI group, a value for scaling a linear value of a PUSCH transmission power is equal to ‘1’, and
wherein the PUSCH transmission power is equally split across antenna ports on which the PUSCH is transmitted with non-zero power.
2. The method of claim 1 , wherein a transmission scheme related to the PUSCH is based on a codebook based transmission.
3. The method of claim 1 , wherein the PUSCH transmission power is full transmission power.
4. The method of claim 1 , wherein the precoding matrix in the TPMI group includes at least one of
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5. The method of claim 1 , wherein the configuration information includes information related to a full power transmission mode of the UE.
6. A user equipment (UE) operating in a wireless communication system, the UE comprising:
one or more transceivers;
one or more processors; and
one or more memories storing instructions that, based on being executed by the one or more processors, control the UE to perform operations including:
transmitting, to a base station, capability information,
wherein the capability information includes information for a transmit precoding matrix indicator (TPMI) group, supported by the UE, which delivers full transmission power, and
wherein, among precoding matrices for single layer transmission using 4 antenna ports based on TPMI indices 0 to 27, the TPMI group includes a precoding matrix comprising a single column containing at least one ‘0’;
receiving, from the base station, configuration information related to a Physical Uplink Shared Channel (PUSCH); and
receiving, from the base station, Downlink Control Information (DCI) for scheduling of the PUSCH,
wherein the DCI includes a field for precoding information and number of layers; and
transmitting, to the base station, the PUSCH based on a precoding matrix related to a TPMI index based on the field,
wherein, based on the precoding matrix related to the TPMI index being the precoding matrix in the TPMI group, a value for scaling a linear value of a PUSCH transmission power is equal to ‘1’, and
wherein the PUSCH transmission power is equally split across antenna ports on which the PUSCH is transmitted with non-zero power.
7. The UE of claim 6 , wherein a transmission scheme related to the PUSCH is based on a codebook based transmission.
8. The UE of claim 6 , wherein the PUSCH transmission power is full transmission power.
9. The UE of claim 6 , wherein the precoding matrix in the TPMI group includes at least one of
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10. The UE of claim 6 , wherein the configuration information includes information related to a full power transmission mode of the UE.
11. At least one non-transitory computer-readable media storing instructions that, based on being executed by at least one processor, perform operations comprising:
transmitting, to a base station, capability information,
wherein the capability information includes information for a transmit precoding matrix indicator (TPMI) group, supported by a User Equipment (UE), which delivers full transmission power, and
wherein, among precoding matrices for single layer transmission using 4 antenna ports based on TPMI indices 0 to 27, the TPMI group includes a precoding matrix comprising a single column containing at least one ‘0’;
receiving, from the base station, configuration information related to a Physical Uplink Shared Channel (PUSCH); and
receiving, from the base station, Downlink Control Information (DCI) for scheduling of the PUSCH,
wherein the DCI includes a field for precoding information and number of layers; and
transmitting, to the base station, the PUSCH based on a precoding matrix related to a TPMI index based on the field,
wherein, based on the precoding matrix related to the TPMI index being the precoding matrix in the TPMI group, a value for scaling a linear value of a PUSCH transmission power is equal to ‘1’, and
wherein the PUSCH transmission power is equally split across antenna ports on which the PUSCH is transmitted with non-zero power.
12. The At least one non-transitory computer-readable media of claim 11 , wherein a transmission scheme related to the PUSCH is based on a codebook based transmission.
13. The At least one non-transitory computer-readable media of claim 11 , wherein the PUSCH transmission power is full transmission power.
14. The At least one non-transitory computer-readable media of claim 11 , wherein the precoding matrix in the TPMI group includes at least one of
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15. The At least one non-transitory computer-readable media of claim 11 , wherein the configuration information includes information related to a full power transmission mode of the UE.