CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of Korea Patent Application No. 10-2019-0017458, filed on Feb. 14, 2019, which is incorporated herein by reference for all purposes as if fully set forth herein.

BACKGROUND OF THE INVENTION

Field of the Invention

The present disclosure relates to a wireless communication system, and more particularly, to a method for transmitting and receiving data in a wireless communication system and a device for supporting the same

Related Art

A mobile communication system has been developed to provide a voice service while ensuring an activity of a user. However, in the mobile communication system, not only a voice but also a data service is extended. At present, due to an explosive increase in traffic, there is a shortage of resources and users demand a higher speed service, and as a result, a more developed mobile communication system is required.

Requirements of a next-generation mobile communication system should be able to support acceptance of explosive data traffic, a dramatic increase in per-user data rate, acceptance of a significant increase in the number of connected devices, very low end-to-end latency, and high-energy efficiency. To this end, various technologies are researched, which include dual connectivity, massive multiple input multiple output (MIMO), in-band full duplex, non-orthogonal multiple access (NOMA), super wideband support, device networking, and the like.

SUMMARY OF THE INVENTION

An embodiment of the present disclosure provides a method and a device for transmitting and receiving data in a wireless communication system.

Furthermore, an embodiment of the present disclosure provides a method for transmitting data by using full transmission power configured by a base station when a terminal transmits uplink data to the base station.

Furthermore, an embodiment of the present disclosure provides a method for transmitting information associated with a capability of the terminal to the base station in order to determine transmission power of the uplink data when the terminal transmits the uplink data to the base station.

Furthermore, an embodiment of the present disclosure provides a method for configuring a Transmit Precoding Matrix Indicator (TPMI) for transmitting the uplink data to the terminal based on the information associated with the capability of the terminal, which the base station receives from the terminal.

Furthermore, an embodiment of the present disclosure provides a method for transmitting the transmission power of the uplink data with full transmission power based on the information associated with the capability of the terminal, which the terminal transmits to the base station and the TPMI configured by the base station.

Technical problems to be solved by the present disclosure are not limited by the above-mentioned technical problems, and other technical problems which are not mentioned above can be clearly understood from the following description by those skilled in the art to which the present disclosure pertains.

In order to solve the technical problem, provided is a method for transmitting uplink data by a user equipment (UE) in a wireless communication system, which includes: transmitting to a base station information associated with a capability of the UE, in which the information includes a subset including at least one transmit precoding matrix indicator (TPMI) supported by the UE; receiving from the base station Downlink Control Information (DCI) for transmitting uplink data, in which the DCI includes a TPMI used for the UE to transmit the uplink data; and transmitting the uplink data to the base station by using transmission power determined based on the TPMI, in which the transmission power is determined according to whether the TPMI is included in the at least one TPMI.

Furthermore, in the present disclosure, when the TPMI is included in the at least one TPMI, the transmission power is full transmission power.

Furthermore, in the present disclosure, a scaling factor for determining the transmission power is configured to ‘1’.

Furthermore, in the present disclosure, when the TPMI is not included in the at least one TPMI, the transmission power is a value smaller than the full transmission power.

Furthermore, in the present disclosure, the scaling factor for determining the transmission power is configured to a value smaller than ‘1’.

Furthermore, in the present disclosure, the method further includes receiving from a base station an RRC message including the full transmission power usable by the UE.

Furthermore, in the present disclosure, the RRC message further includes mode information associated with at least one transmission mode applicable to the UE.

Furthermore, in the present disclosure, when the information is information associated with a specific capability of the UE, the transmission power is the full transmission power.

Furthermore, in the present disclosure, the method may further include when the information is the information associated with the specific capability of the UE, receiving from the base station a scaling value for determining the transmission power, and the transmission power determined based on the scaling value may be evenly distributed among a single or a plurality of antenna ports using non-zero power for transmitting an uplink channel.

Furthermore, provided is a user equipment (UE) transmitting uplink data transmission in a wireless communication system, which includes: one or more transceivers; one or more processors; and one or more memories storing instructions for operations executed by the one or more processors and connected to the one or more processors, in which the operations include transmitting to a base station information associated with a capability of the UE, in which the information includes a subset including at least one transmit precoding matrix indicator (TPMI) supported by the UE, receiving from the base station Downlink Control Information (DCI) for transmitting uplink data, in which the DCI includes the TPMI used for the UE to transmit the uplink data, and transmitting the uplink data to the base station by using transmission power determined based on the TPMI, and in which the transmission power is determined according to whether the TPMI is included in the at least one TPMI.

Furthermore, provided is a method for receiving uplink data by a base station in a wireless communication system receiving from a UE information associated with a capability of the UE, in which the information includes a subset including at least one transmit precoding matrix indicator (TPMI) supported by the UE; transmitting to the UE Downlink Control Information (DCI) for transmitting uplink data, the DCI includes the TPMI used for the UE to transmit the uplink data; and receiving the uplink data from the UE by using transmission power determined based on the TPMI, in which the transmission power is determined according to whether the TPMI is included in the at least one TPMI.

Furthermore, provided is a base station receiving uplink data in a wireless communication system, which includes: one or more transceivers; one or more processors; and one or more memories storing instructions for operations executed by the one or more processors and connected to the one or more processors, in which the operations include receiving from a UE information associated with a capability of the UE, the information includes a subset including at least one transmit precoding matrix indicator (TPMI) supported by the UE, transmitting to the UE Downlink Control Information (DCI) for transmitting uplink data, the DCI includes the TPMI used for the UE to transmit the uplink data, and receiving the uplink data from the UE by using transmission power determined based on the TPMI, and in which the transmission power is determined according to whether the TPMI is included in the at least one TPMI.

Furthermore, provided is a device which includes: one or more memories; and one or more processors functionally connected to the one or more memories, in which the one or more processors are configured to transmit information associated with a capability of the device, in which the information includes a subset including at least one transmit precoding matrix indicator (TPMI) supported by the UE, receive Downlink Control Information (DCI) for transmitting uplink data, in which the DCI includes the TPMI used for the UE to transmit the uplink data, and transmit the uplink data by using transmission power determined based on the TPMI, and in which the transmission power is determined according to whether the TPMI is included in the at least one TPMI.

Furthermore, provided are one or more non-transitory computer-readable media storing one or more instructions, in which the one or more instructions executed by one or more processors are configured to transmit, by a user equipment (UE), information associated with a capability of the UE, in which the information includes a subset including at least one transmit precoding matrix indicator (TPMI) supported by the UE, receive, by the UE, Downlink Control Information (DCI) for transmitting uplink data, in which the DCI includes a TPMI used for the UE to transmit the uplink data, and transmit, by the UE, the uplink data by using transmission power determined based on the TPMI, and in which the transmission power is determined according to whether the TPMI is included in the at least one TPMI.

