Patent ID: 8705396
Filing Date: 2014-04-22
Classification: H04L,H04W

Abstract:
1. A method of controlling uplink transmission power by a user equipment in a wireless communication system that supports carrier aggregation, the method comprising: receiving a first transmission power control (TPC) command for plural configured uplink component carriers (UL CCs) at a subframe via a first downlink component carrier (DL CC); receiving a second TPC command for the plural configured UL CCs at the subframe via a second DL CC, wherein the second DL CC is different from the first DL CC; and performing, by the user equipment, a procedure for adjusting transmission powers of the plurality of configured UL CCs based on the first and second TPC commands, wherein, if the first TPC command and the second TPC command indicate different values, the first and second TPC commands are ignored, and the transmission powers of the plural configured UL CCs are maintained as previous transmission powers of the plural configured UL CCs.