This application discloses a communication method, apparatus, and
system, relating to the field of communication technology. The UE can determine whether to perform PDCCH monitoring based on a target mode, reducing UE response latency and thus improving communication efficiency. The communication method includes: the UE receiving at least one mode configured by the
access network device, where different
modes are used to specify different conflict handling methods when a PDCCH skip occurs during the
waiting period corresponding to the UEIRI. Different
modes are applicable to different state information. The
waiting period corresponding to the UEIRI includes the period from sending the UEIRI to waiting for the
access network device to send a DCI. The UE obtains its state information and, in response to detecting a report requiring the triggering of CSI, sends a first UEIRI to the
access network device, based on configuration information and state information, indicating the target mode corresponding to the UE's state information.