In 250, the terminal device detects second control information sent by the network device in the target control channel resource.
Specifically, after the terminal device obtains the first control information from the target resource set, the terminal device detects the second control information sent by the network device in the target control channel resource corresponding to the target resource set. A beam used for transmitting the second control information on the target control channel resource is the same as that for sending the first control information on the target resource set.
For example, if the first control information is control information transmitted through a PCFICH, then the second control information may be common control information carried in common DCI transmitted through a common search space, or specific control information of the terminal device carried in specific DCI transmitted through a specific search space of the terminal device. If the first control information is common control information carried in common DCI transmitted through a common search space, then the second control information may be specific control information of the terminal device carried in specific DCI transmitted through a specific search space of the terminal device.