METHOD AND APPARATUS FOR CONTROLLING UPLINK POWER IN A WIRELESS ACCESS SYSTEM

摘要

A method and a user equipment (UE) for receiving a power headroom report in a wireless access system that supports a carrier aggregation are discussed. The method according to an embodiment includes transmitting by an eNB to a UE an uplink transmission grant allocating uplink resources on a predetermined subframe in an anchor uplink component carrier (UL CC); and receiving the power headroom report by the eNB from the UE. The power headroom report includes a power headroom value for the anchor UL CC, when the eNB has configured the UE for a simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission. The method further includes reporting the power headroom value to a base station. The power headroom value is calculated.

主权项

1. A method for receiving a power headroom report in a wireless access system that supports a carrier aggregation, the method comprising:
transmitting, by an eNB to a user equipment (UE), an uplink transmission grant allocating uplink resources on a predetermined subframe in an anchor uplink component carrier (UL CC); and receiving, by the eNB from the UE, the power headroom report, wherein the power headroom report includes a power headroom value for the anchor UL CC, when the eNB has configured the UE for a simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission, and wherein the power headroom value is calculated by using:
PHSUM(i)=PCMAXc−10 log10(10PPUSCHc—scheduled(i)/10+10PPUCCH—scheduled(i)/10), where PCMAXc represents the maximum transmission power of the UE, PPUSCHc_scheduled(i) represents a transmission power for the PUSCH, and PPUCCH_scheduled(i) represents a transmission power for the PUCCH, wherein ‘i’ is an index of the predetermined subframe and ‘c’ is an index of the anchor UL CC.