Patent ID: 9674797
Date: 2017-06-06
CPC Classifications: H04W,Y02D

Claim:
1. A method by a base station in a wireless communication system, the method comprising: transmitting configuration information including a periodic power headroom report (PHR) timer for a PHR and information indicating whether a PHR format for a user equipment (UE) is an extended PHR to the UE; and receiving the PHR corresponding to the PHR format from the UE, wherein the received PHR is the extended PHR including a maximum transmission power and an indicator indicating whether the UE applies a power management-maximum power reduction (P-MPR) when determining a lower limit of the maximum transmission power, if the PHR format for the UE is the extended PHR, wherein the received PHR is a normal PHR without the indicator if the PHR format for the UE is not the extended PHR, wherein the PHR is triggered at the UE, when the periodic PHR timer is expired, and wherein the indicator is set to 1 if the maximum transmission power is different from a maximum transmission power not applying a power back-off due to the power management.