The timing information of the first E-HICH is a timing offset τF-DPCH,n and/or a symbol location of a F-DPCH of the first base station. For example, a reference channel is a P-CCPCH, and a timing offset is τF-DPCH,n, which indicates that each F-DPCH frame/subframe is τF-DPCH,n later than the P-CCPCH. Channel timing of the first E-HICH may be known by using the timing offset τF-DPCH,n of the F-DPCH.
In another possible implementation manner, the first instruction signaling and the second instruction signaling further include a code channel and a signature sequence of an E-RGCH, where the E-RGCH is used to control E-DCH transmit power of the UE; or a code channel and a signature sequence of an E-RGCH, and timing information of the E-RGCH, where the timing information of the E-RGCH is used to indicate a time when the UE receives the E-RGCH, and the timing information of the E-RGCH is a timing offset τF-DPCH,n and/or a symbol location of a F-DPCH of the first base station.
The E-DCH transmit power of the UE is controlled by using the E-RGCH, which may avoid interference that is caused by excessively high power to the first base station. For example, uplink interference that is caused to a micro base station when the UE, in area B shown in the figure, performs service transmission in a HetNet may be reduced.
In this embodiment, further, before the RNC generates the first instruction signaling and the second instruction signaling, the method may further include that the RNC receives a measurement report sent by the UE, where the measurement report is sent when the UE measures that common pilot channel quality of the first base station is greater than a preset first threshold.