| 摘要 |
The present invention provides a data transmission method, device, and system, which relate to the communications field and can improve data transmission efficiency. The method includes: sending, by a secondary base station, first information to a primary base station, where the first information includes one of the number x of first PUCCH code channel resources, the number x of first data blocks sent by the secondary base station to a user equipment UE, and a first channel code word; sending, by the secondary base station, identifiers of the x first PUCCH code channel resources and the x first data blocks to the UE; and receiving, by the secondary base station, a feedback from the primary base station, where the feedback is received by the primary base station from the UE by using the first PUCCH code channel resource. The data transmission method, device, and system are applicable to data transmission in carrier aggregation. |
