It should be understood that the serving cell may also be referred to as a source cell, the target cell may be a neighboring cell of the serving cell, and at least one neighboring cell of the serving cell may be a candidate target cell. In other words, in this application, the target cell is one of the at least one neighboring cell of the serving cell, the neighboring cell of the serving cell may also be used as a candidate target cell, and the target cell is one of the candidate target cells. This embodiment of this application is not limited thereto.
It should be understood that “first”, “second”, “third”, “fourth”, and the like in the embodiments of this application are merely used for differentiation, and “first”, “second”, “third”, and “fourth” are not intended to limit the embodiments of this application.
It should be understood that, in the embodiments of this application, one network device may have one or more cells. The serving cell and the target cell may also belong to a same network device, that is, the first network device and the second network device may be a same network device. In this case, the terminal device performs a handover within the network device.