Optionally, when the size n1 of the first DCI is less than a quantity n2 of information bits of the second DCI, both the size of the first DCI and the size of the second DCI are n1, and the second DCI is n1 information bits of the n2 information bits of the second DCI.

The receiving module 610 may be implemented by a transceiver. The processing module 630 may be implemented by a processor. For specific functions and beneficial effects of the receiving module 610 and the processing module 630, refer to the method shown in FIG. 5. Details are not described herein again.

FIG. 7 is a schematic diagram of a structure of a network device according to an embodiment of this application. The network device 700 shown in FIG. 7 may correspond to the foregoing network device. As shown in FIG. 7, the network device 700 includes a sending module 720 and a processing module 730.

The processing module 730 is configured to determine first DCI and second DCI based on a size of the first DCI, where the first DCI is carried on a power saving signal shared by a plurality of terminal devices including the terminal device, and the second DCI is carried on a terminal device specific power saving signal.

The sending module 720 is configured to send the first DCI and the second DCI to the terminal device.

Optionally, in a possible implementation, the size of the first DCI is the same as a size of the second DCI.