DATA TRANSMISSION METHOD, DEVICE, AND SYSTEM

摘要

The present invention provides a data transmission method, device, and system, relating to the field of communications and capable of increasing data transmission efficiency. The method comprises: a secondary base station sending first information to a primary base station, said first information comprising one of: the number x of first PUCCH code channel resources, the number x of first data blocks sent to a user equipment (UE) by the secondary base station, and a first channel codeword; the secondary base station sending to the UE the identifiers of the x first PUCCH code channel resources and the x first data blocks; the secondary base station receiving the feedback from the primary base station, the feedback being received from the UE by means of the first PUCCH code channel resources. The data transmission method, device, and system are suitable for transmission of data in carrier aggregation.