Patent ID: 8619617

Claim:
A data transmission method in a multi-carrier system, comprising: before transmission of uplink data in a time unit, determining, by a user equipment, that the user equipment is scheduled from the network side to perform Semi-Persistent Scheduling, SPS, uplink transmission in the time unit over an uplink component carrier and also determining that the user equipment is scheduled from the network side to perform dynamic scheduling uplink transmission in the time unit over an uplink component carrier, wherein there are a plurality of uplink component carriers available to the user equipment performing uplink transmission; and selecting, by the user equipment, all or a part of uplink component carriers among the plurality of available uplink component carriers and performing SPS uplink transmission and/or dynamic scheduling uplink transmission in the time unit over the respective selected uplink component carriers, wherein performing SPS uplink transmission and/or dynamic scheduling uplink transmission in the time unit over the respective selected uplink component carriers comprises: if the user equipment has both dynamic scheduling uplink transmission and SPS uplink transmission in the time unit over a selected uplink component carrier, the user equipment performing only dynamic scheduling uplink transmission in the time unit over the selected uplink component carrier; if the user equipment has only dynamic scheduling uplink transmission in the time unit over a selected uplink component carrier, the user equipment performing only dynamic scheduling uplink transmission in the time unit over the selected uplink component carrier; and if the user equipment has only SPS uplink transmission in the time unit over a selected uplink component carrier, the user equipment performing only SPS uplink transmission in the time unit over the selected uplink component carrier.