METHOD AND APPARATUS FOR CONTROLLING UPLINK POWER IN A WIRELESS ACCESS SYSTEM
First Claim
1. A method for reporting power headroom value in a wireless access system that supports a carrier aggregation, the method performed by a user equipment (UE) and comprising:
- receiving a uplink transmission grant allocating uplink resources on a predetermined subframe in an anchor uplink component carrier (UL CC);
obtaining power headroom value for the anchor UL CC, if the UE is configured with a simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission; and
reporting the power headroom value to a base station,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, PPUSCH—
scheduled(i) represents a transmission power for the PUSCH, and PPUCCH—
scheduled(i) represents a transmission power for the PUCCH, andwherein ‘
i’
is an index of the predetermined subframe and ‘
c’
is an index of the anchor UL CC.
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Accused Products
Abstract
A method for reporting power headroom value in a wireless access system that supports a carrier aggregation, and a user equipment (UE) for performing the method are discussed. The method according to one embodiment includes receiving a uplink transmission grant allocating uplink resources on a predetermined subframe in an anchor uplink component carrier (UL CC); obtaining power headroom value for the anchor UL CC, if the UE is configured with a simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission; and reporting the power headroom value to a base station. The power headroom value is calculated.
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Citations
8 Claims
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1. A method for reporting power headroom value in a wireless access system that supports a carrier aggregation, the method performed by a user equipment (UE) and comprising:
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receiving a uplink transmission grant allocating uplink resources on a predetermined subframe in an anchor uplink component carrier (UL CC); obtaining power headroom value for the anchor UL CC, if the UE is configured with a simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission; and reporting the power headroom value to a base station, 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, PPUSCH — scheduled(i) represents a transmission power for the PUSCH, and PPUCCH— scheduled(i) represents a transmission power for the PUCCH, andwherein ‘
i’
is an index of the predetermined subframe and ‘
c’
is an index of the anchor UL CC. - View Dependent Claims (2, 3, 4)
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5. A user equipment (UE) for reporting power headroom value in a wireless access system that supports a carrier aggregation, the UE comprising:
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a transmitter; a receiver; and a processor configured to; report the power headroom value by controlling the transmitter and the receiver, receive, by controlling the receiver, a uplink transmission grant allocating uplink resources on a predetermined subframe in an anchor uplink component carrier (UL CC), obtain power headroom value for the anchor UL CC, if the UE is configured with a simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission, and report, by controlling the transmitter, the power headroom value to a base station, 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, PPUSCH — scheduled(i) represents a transmission power for the PUSCH, and PPUCCH— scheduled(i) represents a transmission power for the PUCCH, andwherein ‘
i’
is an index of the predetermined subframe and ‘
c’
is an index of the anchor UL CC. - View Dependent Claims (6, 7, 8)
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Specification