For example, in the candidate control channels including the overlapping resources in the search space 2, candidate control channels having even-numbered candidate control channel indexes are the second part of candidate control channels, and the candidate control channels having even-numbered indexes in the search space 2 are the candidate control channel 4 and the candidate control channel 6. In this case, the second part of candidate control channels include the candidate control channel 4 and the candidate control channel 6. Correspondingly, the first part of candidate control channels include the candidate control channel 2.
In this case, the terminal device detects the candidate control channel 2 in the search space 1, and the terminal device detects the candidate control channel 4 and the candidate control channel 6 in the search space 2.
For another example, in the candidate control channels including the overlapping resources in the search space 2, a candidate control channel having an odd-numbered candidate control channel index is the second part of candidate control channels, and the candidate control channel having an odd-numbered index in the search space 2 is the candidate control channel 5. In this case, the second part of candidate control channels include the candidate control channel 5. Correspondingly, the first part of candidate control channels include the candidate control channel 1 and the candidate control channel 3.
In this case, the terminal device detects the candidate control channel 1 and the candidate control channel 3 in the search space 1, and the terminal device detects the candidate control channel 5 in the search space 2.