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Uplink power headroom reporting for carrier aggregation

  • US 10,271,291 B2
  • Filed: 06/23/2016
  • Issued: 04/23/2019
  • Est. Priority Date: 12/03/2008
  • Status: Active Grant
First Claim
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1. A wireless transmit/receive unit (WTRU) comprising, the WTRU comprising:

  • a processor configured to;

    determine a carrier that does not have a physical uplink shared channel (PUSCH) transmission in a subframe i from a plurality of aggregated carriers;

    calculate a power headroom for the carrier according to the formula;


    PH(k,i)=PCMAX_carrier(k)−

    PPUSCH_REF(k,i)where PH(k,i) is the power headroom for the carrier, k is the carrier, PCMAX_carrier(k) is a maximum power for the carrier, and PPUSCH_REF(k,i) is a transmit power determined according to a reference grant; and

    report the power headroom for the carrier.

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