Embodiments of this application provide a wireless communication method, a communication apparatus, and a communication system. In the method, a terminal determines, based on a detected SSB, a first index of the SSB in a first set and a second index of the SSB, and then determines a resource of the SSB. One SSB may correspond to one or more resources, and time division multiplexing may be performed between different resources. Therefore, there is a plurality of sending occasions for one SSB. Each SSB corresponds to one transmit beam direction, so that a sending occasion of an SSB corresponding to a transmit beam direction may be flexibly adjusted. When a plurality of SSBs in one set are sent, a sending sequence of SSBs corresponding to different transmit beam directions may be determined according to a service requirement, to further determine a resource occupied by each SSB. According to the method, a plurality of SSBs in one set may be flexibly sent on different beams, so that a possibility that the SSBs are detected by the terminal when being sent may be improved, and thus a waste of resources is reduced.