| 主权项 |
1. A method for selecting a transport format in an uplink multiple-input multiple-output system, comprising:
receiving, by a user equipment UE, a reference E-TFC set and a primary-stream channel quality difference in a dual-stream transmission mode that are sent by a base station; acquiring, by the user equipment according to a primary-stream serving grant SG allocated by the base station to the user equipment within a transmission time interval TTI, a first transmit power offset Aed2 of a primary stream granted by the base station; when transmit power of the primary stream is obtained according to primary-stream transmit power granted by the base station, acquiring, by the user equipment, when inter-stream interference is considered and a transmit power offset of the primary stream is Aed2, a first transport format combination indicator E-TFCI1 of the primary stream according to the primary-stream channel quality difference and the Aed2; when the transmit power of the primary stream is obtained according to remaining transmit power, which is calculated according to a limit value of maximum transmit power of the user equipment, calculating, by the user equipment, a second transmit power offset A′ed2 of the primary stream according to the remaining transmit power, and calculating, when inter-stream interference is considered and the transmit power offset of the primary stream is A′ed2, an equivalent transmit power offset A′edm12 of the primary stream according to the primary-stream channel quality difference, the Aed2, and the A′ed2; and calculating, by the user equipment, when inter-stream interference is considered and the transmit power offset of the primary stream is A′ed2, a second transport format combination indicator E-TFCI′1 of the primary stream according to the reference E-TFC set and the A′edm12; and selecting, by the user equipment from the E-TFCI1 and the E-TFCI′1, an indicator, which has a smaller value, as a third transport format combination indicator E-TFCI″1 of the primary stream corresponding to a transport format used by the user equipment to send uplink data. |
