It should be understood that the third aspect is performed by the fourth network device, and specific content of the third aspect corresponds to the content of the first aspect performed by the terminal device and the content of the second aspect performed by the first network device. For corresponding features of the third aspect and beneficial effects achieved by the third aspect, refer to the descriptions in the first aspect or the second aspect. To avoid repetition, detailed descriptions are appropriately omitted herein.
In a possible implementation, the acknowledgment message carries at least one of the following information: a cell identifier of the candidate target cell, frequency information of the candidate target cell, and a C-RNTI allocated by the candidate target cell to the terminal device, an identifier of a first beam that belongs to the candidate target cell, and a first random access channel RACH resource.
It should be understood that the acknowledgment message may further carry other information. For example, the acknowledgment message may further carry other information in the conditional handover configuration information. This embodiment of this application is not limited thereto.
In a possible implementation, when the fourth network device is the network device to which the first target cell belongs, the method further includes the following.