A first node device used for wireless communication, comprising: a first transceiver, configured to receive a first information block and a second information block, wherein the first information block is used to determine a scheduled cell set, the scheduled cell set comprises an integer quantity of serving cells greater than 1, and the second information block is used to determine M PDCCH candidates, M is a positive integer greater than 1; and a first receiver, configured to monitor M1 PDCCH candidates in a first time window, wherein the M1 PDCCH candidates occupy M2 non-overlapped CCEs, M1 is a positive integer greater than 1, M1 is not greater than M, any one of the M1 PDCCH candidates is one of the M PDCCH candidates, and M2 is a positive integer greater than 1; and wherein a first threshold and a second threshold are used to determine the M1 PDCCH candidates from the M PDCCH candidates, the first threshold is a positive integer, and the second threshold is a positive integer; serving cells comprised in the scheduled cell set are divided into a first cell group and a second cell group, a first serving cell is a serving cell comprised in the scheduled cell set, and a quantity of a control resource pool in a scheduling cell of the first serving cell is used to determine whether the first serving cell belongs to the first cell group or the second cell group; a first quantity value and a second quantity value are quantities of serving cells associated with at least one of the M1 PDCCH candidates that are comprised in the first cell group and the second cell group respectively, the first quantity value, the second quantity value, and a target factor are used together to determine the first threshold and the second threshold, and the target factor is a positive number; and a subcarrier spacing of a subcarrier occupied by one non-overlapped CCE of the M2 non-overlapped CCEs in frequency domain is equal to a first subcarrier spacing, and the first subcarrier spacing is used to determine a time length of the first time window. a first transceiver, configured to receive a first information block and a second information block, wherein the first information block is used to determine a scheduled cell set, the scheduled cell set comprises an integer quantity of serving cells greater than 1, and the second information block is used to determine M PDCCH candidates, M is a positive integer greater than 1; and a first receiver, configured to monitor M1 PDCCH candidates in a first time window, wherein the M1 PDCCH candidates occupy M2 non-overlapped CCEs, M1 is a positive integer greater than 1, M1 is not greater than M, any one of the M1 PDCCH candidates is one of the M PDCCH candidates, and M2 is a positive integer greater than 1; and wherein a first threshold and a second threshold are used to determine the M1 PDCCH candidates from the M PDCCH candidates, the first threshold is a positive integer, and the second threshold is a positive integer; serving cells comprised in the scheduled cell set are divided into a first cell group and a second cell group, a first serving cell is a serving cell comprised in the scheduled cell set, and a quantity of a control resource pool in a scheduling cell of the first serving cell is used to determine whether the first serving cell belongs to the first cell group or the second cell group; a first quantity value and a second quantity value are quantities of serving cells associated with at least one of the M1 PDCCH candidates that are comprised in the first cell group and the second cell group respectively, the first quantity value, the second quantity value, and a target factor are used together to determine the first threshold and the second threshold, and the target factor is a positive number; and a subcarrier spacing of a subcarrier occupied by one non-overlapped CCE of the M2 non-overlapped CCEs in frequency domain is equal to a first subcarrier spacing, and the first subcarrier spacing is used to determine a time length of the first time window.