In some embodiments, for each beam, if multiple sending positions, at which a channel is in an unoccupied state, are determined in a synchronous block signal transmission period, a first sending position, at which the channel is in the unoccupied state, may be determined as a target sending position. That is, there is only one target sending position for each beam. In some embodiments, for each beam, if multiple sending positions, at which a channel is in an unoccupied state, are determined within a synchronous block signal transmission period, all the sending positions at which a channel is in an unoccupied state may be determined as the target sending positions. That is, there may be multiple target sending positions for each beam.

In some embodiments, referring to label 15 in FIG. 1D, a sending window for sending a synchronous block signal may be set within a synchronous block signal transmission period. In the sending window, the base station may detect a channel state of the channel continuously, and when the channel detection is successful, the base station sends a synchronous block signal at a first position or all positions where the channel detection is successful using each beam.

At 203, the user equipment determines receiving positions for monitoring synchronous block signals within the set transmission period, and monitors synchronous block signals sent by the data sending terminal using different beams at the receiving positions. The synchronous block signal can indicate a transmission beam corresponding to the synchronous block signal.

In some embodiments, the user equipment may determine the receiving position for monitoring the synchronous block signal within the set transmission period based on the set position parameter.