Method for controlling uplink transmission power and wireless device using same

摘要

Provided are a method for controlling uplink transmission power and a wireless device. The wireless device decides a first transmission power of a first uplink channel, which is transmitted through a first wireless resource from a first serving cell, and decides a second transmission power of a second uplink channel, which is transmitted through a second wireless resource from a second serving cell. The first serving cell belongs to a first timing advance (TA) group, and the second serving cell belongs to a second TA group that differs from the first TA group. All or a portion of the first wireless resource and the second wireless resource overlap, wherein the sum of the first and second transmission powers in the overlapping portion is decided so as not to exceed a maximum transmission power.

主权项

1. A method for uplink transmission in a wireless communication system, the method performed by a user equipment and comprising:
applying a first timing advance to a first serving cell and a second serving cell in order to adjust uplink timing, wherein the first timing advance is applied when the first serving cell and the second serving cell belong to a first group; applying a second timing advance to a third serving cell, wherein the second timing advance is applied when the third serving cell does not belong to the first group, but belongs to a second group; and if an uplink transmission toward one of the first serving cell and the second serving cell belonging to the first group at nth subframe and an uplink transmission of the third serving cell belonging to the second group at (n+1)th subframe are overlapped, determining whether to adjust the total uplink transmission power or drop the uplink transmission at the nth subframe.