Indication of user equipment transmit power capacity in carrier aggregation

摘要

A method of power headroom reporting (PHR) is proposed. A UE is configured with a plurality of component carriers (CCs) and is served by one or more power amplifiers (PAs) in a wireless system with carrier aggregation. The UE determines transmit power limitation (TPL) information that comprises a set of TPL values, each TPL value corresponds to a UE-configured maximum transmit power for UE-level, PA-level, and CC-level. The TPL information is then reduced to non-redundant TPL values. Based on the non-redundant TPL values, the UE determines power headroom (PH) information that comprises a set of PH values. Each PH value equals to a TPL value subtracted by a UE-calculated transmit power. The UE reports the PH information to a base station via a fixed-length or variable-length MAC CE at each PHR reporting instance.

主权项

1. A method, comprising:
determining transmit power limitation (TPL) information by a UE in a wireless communication system, wherein the UE is configured with a plurality of component carriers (CCs) served by one or more power amplifiers (PAs), wherein the TPL information comprises a set of TPL values, each TPL value corresponds to a UE-configured maximum transmit power for the UE; determining power headroom (PH) information that comprises a set of PH values based on the TPL information; and reporting the PH information to a base station, wherein the TPL information is reduced to contain a reduced set of non-redundant TPL values, and wherein the PH information is also reduced to contain a reduced set of non-redundant PH values.