For example, a search space 1 includes a candidate control channel 1 and a candidate control channel 2. The candidate control channel 1 includes {CCE 2, CCE 3}, and the candidate control channel 2 includes {CCE 8, CCE 9}. The CCE 2 in the candidate control channel 1 is the same as a CCE included in another candidate control channel, and the CCE 8 in the candidate control channel 2 is the same as a CCE included in another candidate control channel. The at least two candidate control channels include the candidate control channel 1 and the candidate control channel 2 in a search space set 1.
Optionally, a plurality of candidate control channels in a first search space in at least two search spaces all include overlapping resources, the at least two candidate control channels include the plurality of candidate control channels in the first search space, and the at least one first candidate control channel in the at least two candidate control channels includes a first part of candidate control channels and a second part of candidate control channels. Search spaces in which the first part of candidate control channels are located each are the first-type search space, and search spaces in which the second part of candidate control channels are located each are the second-type search space.
Optionally, the first-type search space is a common search space, and the second-type search space is a specific search space.
The following describes the first part of candidate control channels and the second part of candidate control channels in detail by using specific examples.
For example, it is assumed that search spaces configured for the terminal device include at least a search space 1 and a search space 2 shown in Table 13.
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