Discontinuous reception operation in wireless communication system

A method, comprising:

• receiving, from a base station (BS) by a user equipment (UE), a first configuration message comprising first configuration information for a monitoring occasion for detecting first downlink control information (DCI) format including a wake-up indication field for whether the UE to wake-up;
• receiving, from the base station by the UE, a second configuration message which can comprise second configuration information for an operation to be applied to the UE based on that the first DCI format is not detected;
• and
• monitoring, by the UE, a first physical downlink control channel (PDCCH) for detecting the first DCI format in the monitoring occasion,
• wherein, (i) based on that the second configuration information is absent in the second configuration message and, (ii) based on that the first DCI format is not detected in the monitoring occasion, the UE does not wake-up, and
• wherein, (i) based on that the second configuration information informs the UE to wake-up and, (ii) based on that the first DCI format is not detected in the monitoring occasion, the UE monitors a second PDCCH for detecting second DCI format other than the first DCI format in a next discontinuous reception (DRX) on duration.

A user equipment (UE), comprising:

• at least one memory;
• at least one transceiver;
• and
• at least one processor connected to the at least one transceiver and the at least one memory,
• wherein the at least one memory stores instructions that, based on being executed by the at least one processor, cause the at least one processor to perform operations comprising:
• receiving, from a base station (BS) by the UE, a first configuration message comprising first configuration information for a monitoring occasion for detecting first downlink control information (DCI) format including a wake-up indication field for whether the UE to wake-up;
• receiving, from the base station by the UE, a second configuration message which can comprise second configuration information for an operation to be applied to the UE based on that the first DCI format is not detected;
• and
• monitoring, by the UE, a first physical downlink control channel (PDCCH) for detecting the first DCI format in the monitoring occasion,
• wherein, (i) based on that the second configuration information is absent in the second configuration message and, (ii) based on that the first DCI format is not detected in the monitoring occasion, the UE does not wake-up, and
• wherein, (i) based on that the second configuration information informs the UE to wake-up and, (ii) based on that the first DCI format is not detected in the monitoring occasion, the UE monitors a second PDCCH for detecting second DCI format other than the first DCI format in a next discontinuous reception (DRX) on duration.