Patent ID: 9008000
Filing Date: 2015-04-14
Classification: H04W

Abstract:
1. A method of transmitting a power headroom reporting (PHR), which is transmitted by a user equipment in a wireless communication system supporting a plurality of serving cells, the method comprising: transmitting one of maximum transmit power information, maximum power reduction (MPR) information and user equipment PHR information configured to the user equipment per at least one serving cell among a plurality of the serving cells and PHR information per at least one serving cell configured to the user equipment to a base station if a first PHR triggering condition occurs; and transmitting changed MPR information, changed maximum transmit power information, or changed user equipment PHR information if the MPR information or the maximum transmit power information changes, wherein the user equipment PHR information corresponds to a value resulted from subtracting a total power for scheduled resources from a maximum transmittable power level of the user equipment.