| 摘要 |
The existing technology focuses on the case of the same timing advance (TA) in carrier aggregation, not supporting randomly accessing a SCell in the multi-TA carrier aggregation. The invention provides a method of randomly accessing a SCell and receiving data. For a procedure of randomly accessing a secondary cell (SCell), the UE has accessed a primary cell (PCell), the PCell and the SCell belong to different timing advance groups, the first cell transmits (A, A′, B) a random access command to the UE, the command is used for instructing the UE to access the SCell; According to the random access command, the UE transmits (C) a random access preamble to the SCell. Preferably, the first cell comprises another cell which cross-carrier schedules the SCell or the SCell. The invention provides a technical solution of randomly accessing a SCell in a multi-TA scenario, which fills the gaps in the existing technology. |
