Apparatus and method for controlling uplink transmission power in a multiple element carrier wave system

摘要

The present invention relates to an apparatus and method for controlling uplink transmission power in a multiple element carrier wave system. The method for controlling uplink transmission power by a terminal in a multiple element carrier wave system includes the steps of: generating an uplink signal to be transmitted in a first serving cell; receiving, from a base station, random access start information for commanding the start of a random access procedure for a second serving cell; calculating the estimated surplus power from first transmission power scheduled for an uplink signal transmission, and second transmission power scheduled for a transmission of a PRACH to which a random access preamble is mapped; and when the estimated surplus power is smaller than a threshold power, adjusting the first transmission power or the second transmission power on the basis of power allocation priority.

主权项

1. A method for controlling uplink transmission power by a user equipment in a multiple component carrier system, comprising:
generating an uplink signal to be transmitted on a first serving cell; receiving from a base station random access initiate information commanding initiation of a random access procedure with respect to a second serving cell; calculating estimated power headroom based on both a first transmission power scheduled for transmission of the uplink signal and a second transmission power scheduled for transmission of a physical random access channel (PRACH) to which a random access preamble is mapped; and if the estimated power headroom is less than a threshold power, transmitting the uplink signal and the PRACH at the same time by adjusting the first transmission power or the second transmission power based on a power allocation priority or transmitting selectively either the uplink signal or the PRACH based on the power allocation priority.