# US 12,120,639 B2 · Performing discontinuous reception (DRX) operation based on downlink control information (DCI) > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,639 B2 - Document ID: US12120639B2 - Status: Granted - Kind: B2 - Application number: 18/377,489 - Filed: 2023-10-06 - Published: 2024-02-08 - Granted: 2024-10-15 - Earliest claimed: 2017-03-24 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Seunggye Hwang; Changhwan Park; Joonkui Ahn; Hanjun Park; Suckchel Yang; Sukhyon Yoon; Seokmin Shin - Web page: https://patentgrep.com/patent/US12120639B2 ## CPC - H04W 68/02: Arrangements for increasing efficiency of notification or paging channel - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 52/0229: {where the received signal is a wanted signal} - H04W 52/0219: {where the power saving management affects multiple terminals} - H04W 84/12: WLAN [Wireless Local Area Networks] - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract One disclosure in the present specification presents a method for a wireless device to receive a paging message. The method may comprise: a step of deciding a wake up signal occasion (WUSO) window for attempting to receive a wake up signal (WUS); and a step of monitoring a downlink control channel during a paging window so as to attempt to receive a paging message, if the WUS is received within the decided WUSO window. Here, the WUSO window may be decided according to a duration size and offset. ## Claims ### Claim 1 A method performed by a user equipment (UE) configured to operate in a wireless communication system, the method 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. ### Claim 2 (depends on 1) The method of claim 1, wherein the paging message exists on a same carrier as the WUS. ### Claim 3 (depends on 1) The method of claim 1, wherein the WUS is received within a duration which includes a plurality of subframes. ### Claim 4 (depends on 3) The method of claim 3, further comprising receiving information for the duration which includes the plurality of subframes. ### Claim 5 (depends on 3) The method of claim 3, further comprising: receiving information related to a repetition level over the plurality of subframes, wherein the information related to the repetition level is received per carrier. ### Claim 6 (depends on 3) The method of claim 3, wherein the duration is determined based on the interval in which the PDCCH is monitored and an offset. ### Claim 7 (depends on 1) The method of claim 1, further comprising: determining a start position of the WUS based on the interval in which the PDCCH is monitored and an offset. ### Claim 8 (depends on 1) The method of claim 1, wherein the interval in which the PDCCH is monitored comprises a paging occasion (PO). ### Claim 9 (depends on 8) The method of claim 8, wherein the WUS includes time information of the PO. ### Claim 10 (depends on 9) The method of claim 9, wherein the WUS is generated based on the time information of the PO. ### Claim 11 (depends on 1) The method of claim 1, wherein the sequence is initialized at a start subframe including at least one slot. ### Claim 12 (depends on 1) The method of claim 1, wherein the WUS in an invalid subframe is postponed to a next valid subframe. ### Claim 13 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. ### Claim 14 (depends on 13) The UE of claim 13, wherein the paging message exists on a same carrier as the WUS. ### Claim 15 (depends on 13) The UE of claim 13, wherein the WUS is received within a duration which includes a plurality of subframes, and wherein the duration is determined based on the interval in which the PDCCH is monitored and an offset. ### Claim 16 (depends on 13) The UE of claim 13, wherein the interval in which the PDCCH is monitored comprises a paging occasion (PO). ### Claim 17 (depends on 16) The UE of claim 16, wherein the WUS includes time information of the PO. ### Claim 18 (depends on 17) The UE of claim 17, wherein the WUS is generated based on time information of the PO. ### Claim 19 (depends on 13) The UE of claim 13, wherein the sequence is initialized at a start subframe including at least one slot. ### Claim 20 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.