After determining the to-be-monitored wake up signal in the plurality of wake up signals based on the first category and the mapping relationship between category information and a wake up signal, the network device may send the to-be-monitored wake up signal to the terminal device, that is, perform the following S207:
S207: The network device sends the to-be-monitored wake up signal to the terminal device based on the identifier of the terminal device.
Because the paging message received by the network device includes the identifier of the paged terminal device, after determining the to-be-monitored wake up signal in the plurality of wake up signals based on the first category and the mapping relationship between category information and a wake up signal, the network device may determine the paged terminal device based on the identifier of the terminal device, and send the to-be-monitored wake up signal to the terminal device, to wake up the terminal device by using the to-be-monitored wake up signal.
S208: The terminal device monitors the to-be-monitored wake up signal.