Uplink power control method and user equipment

摘要

The present invention relates to an uplink power control method and user equipment, which involve determining a power correction factor by considering the number of antenna ports. According to the present invention, even when a base station transmits the same power control information to the user equipment, the user equipment maps the power control information to another power correction factor and determines an uplink transmission power depending on an uplink transmission condition. Thus, uplink power control can be performed in a more efficient manner.

主权项

1. A method for controlling uplink power at a user equipment being equipped with Nt number of antenna ports (wherein Nt>1), the method comprising:
receiving a transmission power control (TPC) command for controlling transmission power of an uplink signal from a base station; and deciding a transmission power of the uplink signal by using the TPC command; transmitting the uplink signal to the base station at the decided transmission power, wherein, when a number of antenna ports used for the transmission of the uplink signal is equal to N1 (wherein N1 is a positive integer equal to or less than Nt), the TPC command is mapped to a first correction value, so that the transmission power can be decided based upon the first correction value, and when the number of antenna ports used for the transmission of the uplink signal is equal to N2 (wherein N1≠N2, and wherein N2 is a positive integer equal to or less than Nt), the same TPC command is mapped to a second correction value, so that the transmission power can be decided based upon the second correction value different from the first correction value.