FIG. 3 describes the case in which the conditional handover configuration information is associated with the measurement configuration information. For example, when a specified piece of information, for example, a specified measurement object (that is, a frequency), is configured in the measurement configuration information, the measurement object may not be configured in the conditional handover configuration information. For example, a measurement ID associated with the measurement object may be configured in the conditional handover configuration information, to configure the measurement object. Optionally, in an alternative solution, when a piece of information is configured in the measurement configuration information, the network device may no longer configure the piece of information by using the conditional handover configuration information, and the network device may no longer configure, by using the conditional handover configuration information, information associated with the piece of information. The conditional handover configuration information may be used to configure only information that is not configured in the measurement configuration information. For example, a first frequency is configured in the measurement configuration information. If it is intended to configure the first frequency, a second frequency, and a third frequency in the conditional handover configuration information, because the first frequency is already configured in the measurement configuration information, the conditional handover configuration information may carry information about the second frequency and the third frequency, and may not carry information about the first frequency. The terminal device may determine the first frequency, the second frequency, and the third frequency based on the measurement configuration information and the conditional handover configuration information.
