Patent ID: 9743365
Date: 2017-08-22
CPC Classifications: H04L,H04W

Claim:
1. A method for reporting power headroom (PH) by a terminal in a wireless communication system, the method comprising: receiving, from a base station, a message for configuring an extended power headroom report (PHR); identifying whether a PHR is triggered; determining type 1 PH and type 2 PH for a primary cell (PCell) and type 1 PH for at least one activated secondary cell (SCell) if the PHR is triggered; and transmitting, to the base station, the extended PHR including the determined type 1 PH and type 2 PH for the PCell and type 1 PH for the at least one activated SCell, wherein a maximum uplink transmission power used for determining at least one PH for the extended PHR is determined, without using a back-off parameter, based on at least one of cell specific maximum allowed transmission power and terminal specific maximum allowed transmission power, if the terminal does not transmit a physical uplink shared channel (PUSCH) in a subframe for a serving cell.