Detecting a control channel in a search space
摘要
說明書
The first downlink control information format may be a non-fallback format.
The second downlink control information format may be a fallback format.
In the foregoing process, when the search spaces in which the at least two candidate control channels are located are all specific search spaces, if the at least two candidate control channels include a candidate control channel used for a non-fallback format, the network device sends only the candidate control channel used for the non-fallback format in the at least two candidate control channels. In this way, the terminal device does not need to detect a plurality of different downlink control information formats, so as to avoid a case in which the terminal device cannot correctly parse, when parsing a received control channel, downlink control information sent by the network device. This improves reliability of transmitting control information and/or transmitting a data channel scheduled by using the control information.
In another possible implementation, a candidate control channel that is in the at least two candidate control channels and that is located in the second-type search space is a subset of a candidate control channel that is in the at least two candidate control channels and that is located in the first-type search space.
