The determination unit 510 is further used for determining a target control channel resource corresponding to the target resource set according to the target resource set and a first mapping relationship. The first mapping relationship is used for indicating a corresponding relationship between the multiple candidate resource sets and multiple control channel resources.

The detection unit 520 is further used for detecting second control information sent by the network device in the target control channel resource.

Therefore, when the terminal device receives two pieces of control information sent by the network device through the same beam, the terminal device receives the second control information on the control channel resource corresponding to a resource set for receiving the first control information, such that the terminal device has no need to perform a large amount of blind detection on the multiple control channel resources when receiving the second control information, thereby reducing the complexity of the blind detection for the second control information by the terminal device.

Optionally, a beam for transmitting the second control information on the target control channel resource is the same as a beam for sending the first control information on the target resource set.

Optionally, the determination unit 510 is specifically used for determining the target resource set in resource sets, in which the first control information is capable of being detected in the multiple candidate resource set.