A communications apparatus includes a controller and a wireless communications module. The controller selects a first subset of receiving beam(s) from receiving beams supported by a wireless communications module. The wireless communications module uses the receiving beam(s) in the first subset in turns to receive signals transmitted by a network control device for a first stage of beam training. The network control device uses control beams in turns to transmit the signals. The controller further calculates a detection metric for each combination of the receiving beam(s) in the first subset and the control beams, and determines a preferred control beam and a preferred receiving beam according to the detection metrics for the first stage of beam training.