Method for determining transmit power for performing uplink transmission in wireless communication system and apparatus therefor

A base station configured to receive an uplink channel in a wireless communication system, the base station comprising:

• one or more transceivers;
• one or more processors;
• and
• one or more memories connected to the one or more processors and storing instructions for operations executed by the one or more processors,
• wherein the operations comprise:
• receiving, from a user equipment (UE), UE capability information,
• wherein the UE capability information includes (i) first information for coherence capability supported by the UE and (ii) second information for a subset of transmit precoding matrix indicators (TPMIs) which deliver full transmission power,
• wherein the first information includes one of (i) information for full coherent, (ii) information for partial coherent or (iii) information for non coherent,
• wherein the second information includes (i) a first parameter for a first TPMI for uplink transmission using two antenna ports and (ii) a second parameter for a second TPMI for uplink transmission using four antenna ports,
• wherein the first TPMI and the second TPMI are used to deliver full transmission power,
• wherein the first TPMI based on the first parameter is one of
• 1
• 2
• [
• 1
• 0
• ]
• ⁢
• or
• ⁢
• 1
• 2
• [
• 0
• 1
• ]
• ,
• and
• wherein a precoding matrix related to the second TPMI based on the second parameter includes
• 1
• 2
• [
• 1
• 0
• 0
• 0
• ]
• ⁢
• or
• ⁢
• 1
• 2
• [
• 1
• 0
• 1
• 0
• ]
• ;
• transmitting, to the UE, control information including precoding information for a TPMI used for the UE to transmit the uplink channel;
• and
• receiving, from the UE, the uplink channel based on the control information,
• wherein based on the TPMI given by the precoding information being equal to the first TPMI or the second TPMI, the uplink channel is transmitted with full transmission power.

An apparatus comprising one or more memories and one or more processors operatively coupled to the one or more memories,

• wherein the one or more processors control the apparatus to:
• receive, from a user equipment (UE), UE capability information,
• wherein the UE capability information includes (i) first information for coherence capability supported by the UE and (ii) second information for a subset of transmit precoding matrix indicators (TPMIs) which deliver full transmission power,
• wherein the first information includes one of (i) information for full coherent, (ii) information for partial coherent or (iii) information for non coherent,
• wherein the second information includes (i) a first parameter for a first TPMI for uplink transmission using two antenna ports and (ii) a second parameter for a second TPMI for uplink transmission using four antenna ports,
• wherein the first TPMI and the second TPMI are used to deliver full transmission power,
• wherein the first TPMI based on the first parameter is one of
• 1
• 2
• [
• 1
• 0
• ]
• ⁢
• or
• ⁢
• 1
• 2
• [
• 0
• 1
• ]
• ,
• and
• wherein a precoding matrix related to the second TPMI based on the second parameter includes
• 1
• 2
• [
• 1
• 0
• 0
• 0
• ]
• ⁢
• or
• ⁢
• 1
• 2
• [
• 1
• 0
• 1
• 0
• ]
• ;
• transmit, to the UE, control information including precoding information for a TPMI used for the UE to transmit an uplink channel;
• and
• receive, from the UE, the uplink channel based on the control information,
• wherein based on the TPMI given by the precoding information being equal to the first TPMI or the second TPMI, the uplink channel is transmitted with full transmission power.