# US 12,764,657 B2 · Low-power cell wake-up signal for cell discontinuous reception > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,764,657 B2 - Document ID: US12764657B2 - Status: Granted - Kind: B2 - Application number: 18/168,270 - Filed: 2023-02-13 - Published: 2024-08-15 - Granted: 2026-10-13 - Earliest claimed: 2023-02-13 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Ahmed Elshafie; Krishna Kiran Mukkavilli; Marwen Zorgui; Diana Maamari; Ahmed Attia Abotabl - Web page: https://patentgrep.com/patent/US12764657B2 ## CPC - H04W 52/0206: {in access points, e.g. base stations} - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, an indication of a network capability for low power cell wake-up signal (LP-C-WUS) reception. The UE may transmit, to the network node, an indication of a UE capability for LP-C-WUS transmission. The UE may receive, from the network node, a cell discontinuous reception (DRX) configuration indicating one or more LP-C-WUS monitoring occasions in a cell DRX cycle. The UE may transmit, to the network node, an LP-C-WUS in an LP-C-WUS occasion of the one or more LP-C-WUS occasions. Numerous other aspects are described. ## Claims ### Claim 1 A user equipment (UE) for wireless communication, comprising: one or more antennas; and a processing system that includes one or more processors and one or more memories that store code for the one or more processors, the processing system configured to cause the UE to: receive, from a network node, an indication of a network capability for low power cell wake-up signal (LP-C-WUS) reception; transmit, to the network node, an indication of a UE capability for LP-C-WUS transmission; receive, from the network node, a cell discontinuous reception (DRX) configuration indicating one or more LP-C-WUS monitoring occasions and a plurality of non-low-power cell wake-up signal (non-LP C-WUS) monitoring occasions in a cell DRX cycle, wherein the one or more LP-C-WUS monitoring occasions includes a time window in which the network node is configured to monitor for an LP-C-WUS, and wherein the one or more LP-C-WUS monitoring occasions are scheduled between the plurality of non-LP C-WUS monitoring occasions; and transmit, to the network node, the LP-C-WUS in an LP-C-WUS monitoring occasion of the one or more LP-C-WUS monitoring occasions. ### Claim 2 (depends on 1) The UE of claim 1, wherein the indication of the network capability for LP-C-WUS reception is included in a system information block (SIB) type 1 (SIB1). ### Claim 3 (depends on 1) The UE of claim 1, wherein the indication of the network capability for LP-C-WUS reception indicates whether the network node supports LP-C-WUS reception. ### Claim 4 (depends on 1) The UE of claim 1, wherein the indication of the network capability for LP-C-WUS reception indicates one or more types of LP-C-WUSs supported by a low power wake-up radio (LP-WUR) of the network node, and wherein the LP-C-WUS is a type of LP-C-WUS from the one or more types of LP-C-WUSs supported by the LP-WUR of the network node. ### Claim 5 (depends on 4) The UE of claim 4, wherein the one or more types of LP-C-WUSs supported by the LP-WUR of the network node include one or more of: an on-off keying (OOK) based waveform, a frequency-shift keying (FSK) based orthogonal frequency division multiplexing (OFDM) signal, a sequence based signal, a discrete Fourier transform (DFT) based sequence, or a physical downlink control channel (PDCCH) based signal. ### Claim 6 (depends on 1) The UE of claim 1, wherein the indication of the network capability for LP-C-WUS reception indicates at least one of one or more frequency bands or one or more frequency ranges in which LP-C-WUS reception is supported. ### Claim 7 (depends on 1) The UE of claim 1, wherein the indication of the UE capability for LP-C-WUS transmission indicates whether the UE supports LP-C-WUS transmission. ### Claim 8 (depends on 1) The UE of claim 1, wherein the indication of the UE capability for LP-C-WUS transmission indicates whether the UE supports transmission of one or more types of LP-C-WUS per frequency band, frequency band combination, frequency range, frequency range combination, component carrier, or component carrier combination. ### Claim 9 (depends on 1) The UE of claim 1, wherein the indication of the UE capability for LP-C-WUS transmission is included in a random access channel (RACH) message, a response to the indication of the network capability for LP-C-WUS reception, UE assistance information (UAI), a radio resource control (RRC) message, a medium access control (MAC) control element (MAC-CE), or uplink control information (UCI). ### Claim 10 (depends on 1) The UE of claim 1, wherein LP-C-WUS transmission is enabled for the UE in a full coverage area of a cell associated with the network node, or LP-C-WUS transmission is enabled for the UE in a partial coverage area that is within the full coverage area and smaller than the full coverage area. ### Claim 11 (depends on 10) The UE of claim 10, wherein the one or more processors, to transmit the LP-C-WUS in the LP-C-WUS occasion of the one or more LP-C-WUS occasions, are configured to cause the UE to: transmit the LP-C-WUS using a first set of transmit parameters in connection with the LP-C-WUS transmission being enabled in the full coverage area or using a second set of transmit parameters in connection with the LP-C-WUS being enabled in the partial coverage area. ### Claim 12 (depends on 1) The UE of claim 1, wherein LP-C-WUS transmission is enabled in a first coverage area of a cell associated with the network node, wherein non-LP-C-WUS transmission is enabled in a second coverage area of the cell associated with the network node, and wherein the first coverage area is within the second coverage area and smaller than the second coverage area. ### Claim 13 (depends on 12) The UE of claim 12, wherein the one or more processors, to transmit the LP-C-WUS in the LP-C-WUS occasion, are configured to cause the UE to: transmit the LP-C-WUS in the LP-C-WUS occasion in connection with the UE being within the first coverage area. ### Claim 14 (depends on 12) The UE of claim 12, wherein the one or more processors are further configured to cause the UE to: transmit, to the network node, a non-LP C-WUS in connection with the UE being outside of the first coverage area and within the second coverage area. ### Claim 15 (depends on 12) The UE of claim 12, wherein the one or more processors are further configured to cause the UE to: select whether to transmit the LP-C-WUS or to transmit a non-LP C-WUS based at least in part on at least one of a distance measurement, a pathloss measurement, a channel state information (CSI) measurement, a channel metric, a mobility measurement, a position measurement, or a relative position of the UE with respect to the network node. ### Claim 16 (depends on 12) The UE of claim 12, wherein the one or more processors are further configured to cause the UE to: receive an indication configuring LP-C-WUS transmission or non-LP C-WUS transmission for the UE, wherein the indication is based at least in part on one or more network measurements. ### Claim 17 (depends on 1) The UE of claim 1, wherein the UE supports LP-C-WUS transmission and non-LP C-WUS transmission, and wherein the one or more processors are further configured to cause the UE to: select whether to transmit the LP-C-WUS in one of the one or more LP-C-WUS monitoring occasions or to transmit a non-LP C-WUS in a non-LP C-WUS monitoring occasion of the plurality of non-LP C-WUS monitoring occasions based at least in part on at least one of one or more traffic characteristics of traffic associated with the UE or a radio resource control (RRC) mode of the UE. ### Claim 18 (depends on 17) The UE of claim 17, wherein the one or more processors are further configured to cause the UE to: receive a configuration of at least one of first transmit parameters for the LP-C-WUS or second transmit parameters for the non-LP C-WUS. ### Claim 19 (depends on 1) The UE of claim 1, wherein the one or more LP-C-WUS monitoring occasions are scheduled when a main radio (MR) of the network node is in a sleep state, and wherein the plurality of non-LP C-WUS monitoring occasions are scheduled when the MR is in an active state. ### Claim 20 (depends on 19) The UE of claim 19, wherein the plurality of non-LP C-WUS monitoring occasions include a first non-LP C-WUS monitoring occasion and a second non-LP C-WUS monitoring occasion, and wherein the one or more LP-C-WUS monitoring occasions are between the first non-LP C-WUS monitoring occasion and the second non-LP C-WUS monitoring occasion. ### Claim 21 (depends on 1) The UE of claim 1, wherein the one or more LP-C-WUS monitoring occasions include a first LP-C-WUS monitoring occasion associated with a first type of LP-C-WUS and a second LP-C-WUS monitoring occasion associated with a second type of LP-C-WUS. ### Claim 22 (depends on 21) The UE of claim 21, wherein the cell DRX configuration indicates a time gap between the first LP-C-WUS monitoring occasion and the second LP-C-WUS monitoring occasion. ### Claim 23 (depends on 1) The UE of claim 1, wherein the cell DRX configuration includes: a first cell DRX configuration of a first cell DRX cycle associated with a low-power wake-up radio (LP-WUR) of the network node, the first cell DRX cycle including the one or more LP-C-WUS monitoring occasions, and a second cell DRX configuration of a second cell DRX cycle associated with a main radio of the network node, the second DRX cycle including one or more non-LP-C-WUS monitoring occasions. ### Claim 24 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to cause the UE to: receive, from the network node, an indication that enables LP-C-WUS transmission; and wherein the one or more processors, to transmit the LP-C-WUS, are configured to: transmit the LP-C-WUS based at least in part on the indication that enables LP-C-WUS transmission. ### Claim 25 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to cause the UE to: transmit, to the network node, one or more synchronization signals for synchronization of a low-power wake-up radio (LP-WUR) of the network node, wherein the one or more synchronization signals include at least one of a periodic synchronization signal or a preamble symbol transmitted with the LP-C-WUS. ### Claim 26 (depends on 1) The UE of claim 1, wherein a payload of the LP-C-WUS indicates at least one of: a wake-up indication, a requested duration for an active time for the network node, a requested start time for the active time for the network node, a synchronization signal block (SSB) request, a system information block (SIB) type 1 (SIB1) request, a search space set group (SSSG) configuration index to be used for physical downlink control channel (PDCCH) monitoring, an energy request for wireless charging by the UE, an indication of traffic to be transmitted by the UE, a priority or quality of service (QoS) of the traffic to be transmitted by the UE, a type of the traffic to be transmitted by the UE, a capability of the UE, an uplink buffer status report (BSR), or a maximum size of a downlink BSR supported by the UE in a subsequent time period. ### Claim 27 A network node for wireless communication, comprising: one or more antennas; and a processing system that includes one or more processors and one or more memories that store code for the one or more processors, the processing system configured to cause the network node to: transmit an indication of a network capability for low power cell wake-up signal (LP-C-WUS) reception; receive an indication of a user equipment (UE) capability for LP-C-WUS transmission; transmit a cell discontinuous reception (DRX) configuration indicating one or more LP-C-WUS monitoring occasions and a plurality of non-low-power cell wake-up signal (non-LP C-WUS) monitoring occasions in a cell DRX cycle, wherein the one or more LP-C-WUS monitoring occasions includes a time window in which the network node is configured to monitor for an LP-C-WUS, and wherein the one or more LP-C-WUS monitoring occasions are scheduled between the plurality of non-LP C-WUS monitoring occasions; and receive the LP-C-WUS in an LP-C-WUS monitoring occasion of the one or more LP-C-WUS monitoring occasions. ### Claim 28 (depends on 27) The network node of claim 27, wherein the one or more processors, to receive the LP-C-WUS, are configured to cause the network node to: receive the LP-C-WUS using a low-power wake-up radio (LP-WUR) of the network node while a main radio of the network node is in a sleep state, and wherein the one or more processors are further configured to: switch the main radio to an active state in connection with reception of the LP-C-WUS; and communicate with the UE using the main radio while the main radio is in the active state. ### Claim 29 A method of wireless communication performed by a user equipment (UE), comprising: receiving, from a network node, an indication of a network capability for low power cell wake-up signal (LP-C-WUS) reception; transmitting, to the network node, an indication of a UE capability for LP-C-WUS transmission; receiving, from the network node, a cell discontinuous reception (DRX) configuration indicating one or more LP-C-WUS monitoring occasions and a plurality of non-low-power cell wake-up signal (non-LP C-WUS) monitoring occasions in a cell DRX cycle, wherein the one or more LP-C-WUS monitoring occasions includes a time window in which the network node is configured to monitor for an LP-C-WUS, and wherein the one or more LP-C-WUS monitoring occasions are scheduled between the plurality of non-LP C-WUS monitoring occasions; and transmitting, to the network node, the LP-C-WUS in an LP-C-WUS monitoring occasion of the one or more LP-C-WUS monitoring occasions. ### Claim 30 A method of wireless communication performed by a network node, comprising: transmitting an indication of a network capability for low power cell wake-up signal (LP-C-WUS) reception; receiving an indication of a user equipment (UE) capability for LP-C-WUS transmission; transmitting a cell discontinuous reception (DRX) configuration indicating one or more LP-C-WUS monitoring occasions and a plurality of non-low-power cell wake-up signal (non-LP C-WUS) monitoring occasions in a cell DRX cycle, wherein the one or more LP-C-WUS monitoring occasions includes a time window in which the network node is configured to monitor for an LP-C-WUS, and wherein the one or more LP-C-WUS monitoring occasions are scheduled between the plurality of non-LP C-WUS monitoring occasions; and receiving the LP-C-WUS in an LP-C-WUS monitoring occasion of the one or more LP-C-WUS monitoring occasions.