Performing discontinuous reception (DRX) operation based on downlink control information (DCI)

A user equipment (UE) configured to operate in a wireless communication system, the UE comprising:

• a transceiver;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• monitoring a wake up signal (WUS);
• monitoring a physical downlink control channel (PDCCH) related to a reception of a paging message based on detecting the WUS;
• and
• receiving the paging message based on detecting the PDCCH,
• wherein a sequence of the WUS is generated based on i) an interval in which the PDCCH is monitored, and ii) a cell identifier, and
• wherein, based on there being at least one reference element (RE) where cell-specific reference signals (CRSs) or narrowband reference signals (NRSs) are transmitted in a subframe, the WUS is mapped to one or more REs excluding the at least one RE in the subframe.

A non-transitory computer readable medium (CRM) having stored thereon a program code implementing instructions that, based on being executed by at least one processor of a user equipment (UE), perform operations comprising:

• monitoring a wake up signal (WUS);
• monitoring a physical downlink control channel (PDCCH) related to a reception of a paging message based on detecting the WUS;
• and
• receiving the paging message based on detecting the PDCCH,
• wherein a sequence of the WUS is generated based on i) an interval in which the PDCCH is monitored, and ii) a cell identifier, and
• wherein, based on there being at least one reference element (RE) where cell-specific reference signals (CRSs) or narrowband reference signals (NRSs) are transmitted in a subframe, the WUS is mapped to one or more REs excluding the at least one RE in the subframe.