Low power wake-up radio signaling in wireless communications

Abstract

Methods, systems, and devices for wireless communication are described. Techniques described herein relate to a user equipment (UE) that may include a wake-up radio in addition to a main radio to monitor a wake-up signal when the UE is in a sleep mode. The wake-up radio receiver may use less power than the main radio. In some examples, a first UE may indicate to a wireless node (e.g., a control sidelink UE or a network entity) that the UE is capable of transmitting a wake-up signal to a second UE. In such examples, the wireless node may send a wake-up signal intended for the second UE to the first UE based on the capability report. The first UE may relay the wake-up signal to the second UE. In response to receiving the wake-up signal, the second UE may wake up the primary radio of the second UE for communication.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This patent application claims priority to U.S. patent application No. 18 / 174,398, filed by Elshafie et al. on February 24, 2023, entitled “LOW-POWERWAKEUP RADIO SIGNALING IN WIRELESS COMMUNICATIONS,” which is assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0002] The following relates to wireless communications, including low-power wake-up radio signaling in wireless communications. Background Art

[0003] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and more. These systems may be capable of supporting communications with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth-generation (4G) systems (such as Long Term Evolution (LTE), LTE-Advanced (LTE-A), or LTE-A Pro) and fifth-generation (5G) systems (which may be referred to as New Radio (NR) systems). These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform-spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communication system may include one or more base stations, each of which supports wireless communications for communication devices, which may be referred to as user equipment (UE). Components within a wireless communication system may be coupled to each other (e.g., operatively, communicatively, functionally, electronically, and / or electrically). Summary of the Invention

[0004] The described techniques relate to improved methods, systems, devices, and apparatuses for supporting low-power wake-up radio signaling in wireless communications. For example, the described techniques provide configurations for wake-up radio signaling. In some examples, a UE may include a wake-up radio in addition to a primary radio to monitor for wake-up signals when the UE is in sleep mode. The wake-up radio receiver uses less power than the primary radio, and thus including the wake-up radio saves power at the UE when the UE is in sleep mode. In some examples, a first UE may indicate to a wireless node (e.g., a control sidelink UE or a network entity) that the first UE is capable of transmitting a wake-up signal to a second UE. In such examples, the wireless node may send a wake-up signal intended for the second UE to the first UE based on a capability report. The first UE may relay the wake-up signal to the second UE. In response to receiving the wake-up signal, the second UE may wake up the second UE's primary radio to communicate. Summary of the Invention

[0005] A method for wireless communication is described. The method may include: transmitting, by a first user equipment (UE), capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio; receiving the wake-up signaling from the wireless device based on transmitting the capability information; and transmitting the wake-up signaling to the wake-up radio of the second UE.

[0006] An apparatus for wireless communication is described. The apparatus may include at least one processor, a memory coupled to the at least one processor, and instructions stored in the memory. The instructions may be executable by the at least one processor (e.g., directly, indirectly, after pre-processing, or without pre-processing) to cause the apparatus to: send capability information by a first UE, the capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio; receive the wake-up signaling from the wireless device based on sending the capability information; and send the wake-up signaling to the wake-up radio of the second UE.

[0007] Another apparatus for wireless communication is described. The apparatus may include: means for transmitting, by a first UE, capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio; means for receiving the wake-up signaling from the wireless device based on transmitting the capability information; and means for transmitting the wake-up signaling to the wake-up radio of the second UE.

[0008] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by a processor (e.g., directly, indirectly, after pre-processing, or without pre-processing) to: send, by a first UE, capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio; receive the wake-up signaling from the wireless device based on sending the capability information; and send the wake-up signaling to the wake-up radio of the second UE.

[0009] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving one or more parameters for sending the wake-up signaling to the second UE, the one or more parameters comprising a repetition factor, a transmit power, a periodicity, a waveform, a modulation and coding scheme, or any combination thereof, wherein sending the wake-up signaling may be based on the one or more parameters.

[0010] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving a request to update the one or more parameters from the second UE based at least in part on an indication in the capability information that the first UE may be able to receive wake-up radio signaling from the second UE.

[0011] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving an update of the one or more parameters from the wireless device based on an indication in the capability information that the first UE may be unable to receive wake-up radio signaling from the second UE, wherein the wireless device includes a network entity.

[0012] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending, via the capability information, an indication of one or more wake-up message types that the first UE may be capable of sending, the one or more wake-up message types comprising a wake-up signal, a wake-up reference signal, a synchronization signal, or any combination thereof, wherein sending the wake-up signaling comprises sending one of the wake-up message types sent via the capability information.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the wake-up signaling may include operations, features, components, or instructions for: sending the wake-up signaling to a wake-up radio of the second UE, the wake-up signaling indicating that the second UE may wake up a primary radio of the second UE to communicate wirelessly via a first radio access technology in a set of multiple radio access technologies supported by the second UE, wherein the wake-up signaling includes a first waveform in a set of multiple waveforms corresponding to a corresponding radio access technology in the set of multiple radio access technologies, or the wake-up signaling may be sent via a first resource set in a set of multiple resource sets corresponding to a corresponding radio access technology in the set of multiple radio access technologies.

[0014] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: sending, via the capability information: an indication that the first UE may be able to support a wake-up radio, or both a wake-up radio and a primary radio for a set of frequency resources, an indication of one or more candidate parameters for the wake-up signaling corresponding to the wake-up radio, the primary radio, or both, or any combination thereof.

[0015] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending an indication of a threshold distance from the wireless device corresponding to wake-up signaling to the second UE, wherein receiving the wake-up signaling from the wireless device may satisfy the threshold distance based on a location of the second UE.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the capability information may include operations, features, components, or instructions for sending an initial registration message, a random access message, a radio resource control message, or any combination thereof to the wireless device, wherein the wireless device includes a network entity.

[0017] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the capability information may include operations, features, components, or instructions for sending a sidelink control information message, a sidelink radio resource control message, or any combination thereof to the wireless device, wherein the wireless device comprises a primary sidelink UE.

[0018] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: sending the capability information may be based on a power level or charging rate at the first UE satisfying a threshold.

[0019] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending, via the capability information, an indication that the first UE supports discontinuous reception operation using a primary radio or a wake-up radio of the first UE.

[0020] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for selecting a discontinuous reception cycle based on the indication that the first UE supports the discontinuous reception operation, wherein sending the wake-up signaling to the wake-up radio of the second UE may be based on the discontinuous reception cycle.

[0021] A method for wireless communication is described. The method may include receiving control signaling including one or more parameters for receiving wake-up signaling from a first UE by a second UE associated with a wake-up radio; monitoring the wake-up signaling based on the one or more parameters; and receiving the wake-up signaling from a wireless device via the first UE based on the monitoring.

[0022] An apparatus for wireless communication is described. The apparatus may include at least one processor, a memory coupled to the at least one processor, and instructions stored in the memory. The instructions may be executable by the at least one processor (e.g., directly, indirectly, after pre-processing, or without pre-processing) to cause the apparatus to: receive control signaling including one or more parameters for a second UE associated with a wake-up radio to receive wake-up signaling from a first UE; monitor the wake-up signaling based on the one or more parameters; and receive the wake-up signaling from a wireless device via the first UE based on the monitoring.

[0023] Another apparatus for wireless communication is described. The apparatus may include: means for receiving control signaling including one or more parameters for receiving wake-up signaling from a first UE by a second UE associated with a wake-up radio; means for monitoring the wake-up signaling based on the one or more parameters; and means for receiving the wake-up signaling from a wireless device via the first UE based on the monitoring.

[0024] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by a processor (e.g., directly, indirectly, after pre-processing, or without pre-processing) to: receive control signaling including one or more parameters for a second UE associated with a wake-up radio to receive wake-up signaling from a first UE; monitor the wake-up signaling based on the one or more parameters; and receive the wake-up signaling from a wireless device via the first UE based on the monitoring.

[0025] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more parameters include a repetition factor, a transmit power, a periodicity, a waveform, a modulation and coding scheme, or any combination thereof, and receiving the wake-up signaling may be based on the one or more parameters.

[0026] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending a request for the one or more parameters to the wireless device or the first UE before entering sleep mode, wherein receiving the one or more parameters may be based on sending the request.

[0027] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the request for the one or more parameters may include operations, features, components, or instructions for sending an indication of one or more candidate parameters including the one or more parameters based on a current location of the second UE, a power state of the second UE, a charging rate profile at the second UE, or any combination thereof.

[0028] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: sending a request to the wireless device or the first UE to update the one or more parameters; receiving an update of the one or more parameters from the wireless device or the first UE based on sending the request; and receiving additional wake-up signaling from the first UE based on the update of the one or more parameters.

[0029] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the wake-up signaling may include operations, features, components, or instructions for: receiving the wake-up signaling using the wake-up radio of the second UE, the wake-up signaling indicating that the second UE may wake up the second UE's primary radio to communicate wirelessly via a first radio access technology in a set of multiple radio access technologies supported by the second UE, wherein the wake-up signaling includes a first waveform in a set of multiple waveforms corresponding to a corresponding radio access technology in the set of multiple radio access technologies, or the wake-up signaling may be sent via a first resource set in a set of multiple resource sets corresponding to a corresponding radio access technology in the set of multiple radio access technologies.

[0030] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more parameters include an indication of a set of multiple radio access technologies, a set of multiple resource sets, a set of multiple waveforms, or any combination thereof.

[0031] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving, from the wireless device or the first UE, an indication of a set of candidate UEs including the first UE, each candidate UE in the set of candidate UEs being capable of relaying wake-up signaling to the second UE, wherein the monitoring may be based on the indication of the set of candidate UEs.

[0032] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending capability information indicating that the second UE may be able to receive wireless signaling via the wake-up radio, or both the wake-up radio and the primary radio, for a set of frequency resources, the capability information also including an indication of one or more candidate parameters for the wake-up signaling corresponding to the wake-up radio, the primary radio, or both, or any combination thereof.

[0033] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: sending one or more reference signals to the wireless device before entering sleep mode, the wireless device including a network entity, wherein receiving the wake-up signaling from the wireless device via the first UE may be based on sending the one or more reference signals.

[0034] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending, to the wireless device, mobility information indicating a location of the second UE, a direction of the second UE, a speed of the second UE, an indication that the UE is leaving a coverage area, or any combination thereof, wherein receiving the wake-up signaling from the wireless device via the first UE may be based on sending the mobility information.

[0035] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the wireless device includes a network entity or a sidelink UE.

[0036] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending, using a primary radio or a wake-up radio of the second UE, capability information including an indication that the second UE supports discontinuous reception operation.

[0037] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for selecting a discontinuous reception cycle based on the indication that the second UE supports the discontinuous reception operation, wherein receiving the wake-up signaling from the wireless device via the first UE may be based on the discontinuous reception cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 An example of a wireless communication system supporting low-power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is illustrated.

[0039] Figure 2 An example of a wireless communication system supporting low-power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is illustrated.

[0040] Figure 3 An example of a process flow for supporting low power wake-up radio signaling in wireless communications in accordance with one or more aspects of the present disclosure is illustrated.

[0041] Figure 4 and Figure 5 A block diagram illustrating a device supporting low-power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is illustrated.

[0042] Figure 6 A block diagram illustrating a communications manager supporting low-power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is illustrated.

[0043] Figure 7A diagram illustrating a system including a device supporting low-power wake-up radio signaling in wireless communications in accordance with one or more aspects of the present disclosure is illustrated.

[0044] Figures 8 to 12 A flow chart illustrating a method of supporting low power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is illustrated. DETAILED DESCRIPTION

[0045] Some wireless communication systems may support multiple communication links (e.g., a cellular link between a network entity and one or more user equipment (UEs) (the cellular link may be referred to as a Uu link), and a side link between the UEs (the side link may be referred to as a PC5 interface)). In some cases, to reduce power consumption, the UE may put the primary radio into a dormant state (e.g., may enter sleep mode). In such cases, the UE may be equipped with a low-power wake-up radio (LP-WUR) to wake up the primary radio upon receiving a low-power wake-up signal (LP-WUS). In some examples, the network entity may provide services to UEs in various coverage areas located near or far from the network entity. A UE located near the network entity (e.g., located in a first coverage area) may successfully receive downlink signaling via the primary radio, wake-up signaling via the LP-WUR, or both. However, a UE located far from the network entity (e.g., located in a second coverage area) may not be able to reliably receive the LP-WUS from the network entity due to being located in the second coverage area.

[0046] Various aspects of the present disclosure relate to UE and network capability signaling and forwarding of wake-up signaling. In some examples, a network entity may communicate with a first UE and a second UE. If the network entity transmits an LP-WUS to a second UE equipped with an LP-WUR, the second UE may be unable to receive the LP-WUS due to being outside the LP-WUS coverage area (e.g., the first coverage area). In such a case, the first UE (e.g., located within the LP-WUS coverage area) may relay the LP-WUS to the second UE. In such a case, the network entity may indicate to the first UE that the LP-WUS is intended for the second UE. In some examples, the first UE may indicate to the network entity its capability to transmit LP-WUS signals to the second UE. The first UE may transmit the indication using a primary radio or an LP-WUR. In some implementations, the first UE may receive the LP-WUS from the network entity and may relay the LP-WUS to the second UE. In some implementations, the first UE may receive an indication that the network entity intends to transmit the LP-WUS to the second UE, and based on receiving the indication, the first UE may generate and transmit the LP-WUS to the first UE.

[0047] Various aspects of the present disclosure are first described in the context of a wireless communication system. Additionally, various aspects of the present disclosure are illustrated with reference to process flows. Various aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flow diagrams related to low-power wake-up radio signaling in wireless communications.

[0048] Figure 1 An example of a wireless communication system 100 that supports low-power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating according to other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.

[0049] The network entities 105 may be dispersed throughout a geographic area to form the wireless communication system 100 and may include devices that take different forms or have different capabilities. In various examples, the network entities 105 may be referred to as network elements, mobility elements, radio access network (RAN) nodes, or network equipment, among other nomenclature. In some examples, the network entities 105 and the UEs 115 may communicate wirelessly via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, the network entities 105 may support a coverage area 110 (e.g., a geographic coverage area) within which the UEs 115 and the network entities 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area within which the network entities 105 and the UEs 115 may support communication of signals based on one or more radio access technologies (RATs).

[0050] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile or both stationary and mobile at different times. The UEs 115 may be devices that take different forms or have different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. The UEs 115 described herein may be capable of supporting communication with various types of devices such as Figure 1 Other UEs 115 or network entities 105 are shown communicating.

[0051] As described herein, a node of wireless communication system 100 (which may be referred to as a network node or wireless node) may be a network entity 105 (e.g., any network entity described herein), a UE 115 (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, the node may be UE 115. As another example, the node may be network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be UE 115, the second node may be network entity 105, and the third node may be UE 115. In another aspect of this example, the first node may be UE 115, the second node may be network entity 105, and the third node may be network entity 105. In other aspects of this example, the first node, the second node, and the third node may be different relative to these examples. Similarly, references to UE 115, network entity 105, apparatus, device, computing system, etc. may include disclosure of UE 115, network entity 105, apparatus, device, computing system, etc. as nodes. For example, a disclosure that UE 115 is configured to receive information from network entity 105 also discloses that the first node is configured to receive information from the second node.

[0052] In some examples, network entities 105 may communicate with core network 130, or with each other, or both. For example, network entities 105 may communicate with core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, network entities 105 may communicate with each other via backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols), either directly (e.g., between network entities 105) or indirectly (e.g., via core network 130). In some examples, network entities 105 may communicate with each other via midhaul communication links 162 (e.g., according to a midhaul interface protocol) or fronthaul communication links 168 (e.g., according to a fronthaul interface protocol), or any combination thereof. Backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., electrical links, fiber optic links), one or more wireless links (e.g., radio links, wireless optical links), etc., or various combinations thereof. UE 115 may communicate with core network 130 via communication link 155 .

[0053] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a Node B, an eNodeB (eNB), a next-generation Node B, or a gigabit Node B (any of which may be referred to as a gNB), a 5G NB, a next-generation eNB (ng-eNB), a Home Node B, a Home eNode B, or other suitable terminology). In some examples, the network entity 105 (e.g., the base station 140) may be implemented in a converged (e.g., monolithic, standalone) base station architecture that may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as the base station 140).

[0054] In some examples, the network entity 105 can be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that can be configured to utilize a protocol stack that is physically or logically distributed between two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN)). For example, the network entity 105 can include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (RIC) 175 (e.g., a near real-time RIC (near RT RIC), a non-real-time RIC (non-RT RIC)), a service management and orchestration (SMO) 180 system, or any combination thereof. The RU 170 may also be referred to as a radio head, smart radio head, remote radio head (RRH), remote radio unit (RRU), or transmit receive point (TRP). One or more components of the network entity 105 in the disaggregated RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 of the disaggregated RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0055] The functional split between CU 160, DU 165, and RU 170 is flexible and can support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combination thereof) are performed at CU 160, DU 165, or RU 170. For example, a functional split of the protocol stack can be employed between CU 160 and DU 165, such that CU 160 can support one or more layers of the protocol stack and DU 165 can support one or more different layers of the protocol stack. In some examples, CU 160 can host higher protocol layer (e.g., Layer 3 (L3), Layer 2 (L2)) functionality and signaling (e.g., Radio Resource Control (RRC), Service Data Adaptation Protocol (SDAP), Packet Data Convergence Protocol (PDCP)). The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as Layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally or alternatively, a functional split of the protocol stack may be employed between the DUs 165 and RUs 170, such that the DUs 165 may support one or more layers of the protocol stack and the RUs 170 may support one or more different layers of the protocol stack. The DUs 165 may support one or more different cells (e.g., via one or more RUs 170). In some cases, the functional split between the CU 160 and the DU 165 or between the DU 165 and the RU 170 may be within the protocol layer (e.g., some functions of a protocol layer may be performed by one of the CU 160, DU 165, or RU 170, while other functions of the protocol layer may be performed by a different one of the CU 160, DU 165, or RU 170). The CU 160 may be further functionally split into CU control plane (CU-CP) and CU user plane (CU-UP) functions. The CU 160 may be connected to one or more DUs 165 via midhaul communication links 162 (e.g., F1, F1-c, F1-u), and the DU 165 may be connected to one or more RUs 170 via fronthaul communication links 168 (e.g., an open fronthaul (FH) interface). In some examples, midhaul communication link 162 or fronthaul communication link 168 may be implemented according to interfaces (eg, channels) between layers of a protocol stack supported by respective network entities 105 communicating via such communication links.

[0056] In some wireless communication systems (e.g., wireless communication system 100), the infrastructure and spectrum resources used for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as a donor entity or IAB donor. One or more DUs 165 or one or more RUs 170 may be partially controlled by one or more CUs 160 associated with a donor network entity 105 (e.g., donor base station 140). One or more donor network entities 105 (e.g., IAB donors) may communicate with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication link 120). The IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by the coupled IAB donor's DU 165. The IAB-MT may include an independent set of antennas for relaying communications with the UE 115, or may share the same antennas of the IAB node 104 (e.g., of the RU 170) for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the disaggregated RAN architecture (e.g., one or more IAB nodes 104 or components of the IAB node 104) may be configured to operate according to the techniques described herein.

[0057] For example, an access network (AN) or RAN may include communications between an access node (e.g., an IAB donor), IAB node 104, and one or more UEs 115. The IAB donor may facilitate connectivity between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130). That is, the IAB donor may refer to a RAN node with a wired or wireless connection to the core network 130. The IAB donor may include a CU 160 and at least one DU 165 (e.g., and RU 170), where the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link). The IAB donor and IAB node 104 may communicate via the F1 interface according to a protocol that defines signaling messages (e.g., the F1 AP protocol). Additionally or alternatively, the CU 160 may communicate with the core network via an interface (which may be an example of a portion of a backhaul link) and may communicate with other CUs 160 (e.g., CUs 160 associated with an alternative IAB donor) via an Xn-C interface (which may be an example of a portion of a backhaul link).

[0058] An IAB node 104 may refer to a RAN node that provides IAB functionality (e.g., access for UE 115, wireless self-backhaul capabilities, etc.). A DU 165 may act as a distributed scheduling node toward child nodes associated with the IAB node 104, and an IAB-MT may act as a scheduled node toward a parent node associated with the IAB node 104. In other words, an IAB donor may be referred to as a parent node that communicates with one or more child nodes (e.g., the IAB donor may relay transmissions for UEs via one or more other IAB nodes 104). Additionally or alternatively, depending on the relay chain or configuration of the AN, an IAB node 104 may also be referred to as a parent node or child node of other IAB nodes 104. Thus, the IAB-MT entity of the IAB node 104 may provide a Uu interface for the child IAB node 104 to receive signaling from the parent IAB node 104 , and a DU interface (eg, DU 165 ) may provide a Uu interface for the parent IAB node 104 to signal to the child IAB node 104 or the UE 115 .

[0059] For example, IAB node 104 may be referred to as a parent node supporting communications for child IAB nodes, or as a child IAB node associated with an IAB donor, or both. The IAB donor may include a CU 160 having a wired or wireless connection to the core network 130 (e.g., backhaul communication link 120) and may serve as a parent node for IAB node 104. For example, the DU 165 of the IAB donor may relay transmissions to UE 115 via IAB node 104, or may directly signal the transmissions to UE 115, or both. The CU 160 of the IAB donor may signal the establishment of a communication link to IAB node 104 via the F1 interface, and IAB node 104 may schedule transmissions (e.g., transmissions relayed from the IAB donor to UE 115) via the DU 165. That is, data may be relayed to and from IAB node 104 via signaling via the NR Uu interface of the MT to IAB node 104. Communications with the IAB node 104 may be scheduled by the DU 165 of the IAB donor, and communications with the IAB node 104 may be scheduled by the DU 165 of the IAB node 104 .

[0060] Where the techniques described herein are applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support low-power wake-up radio signaling in wireless communications as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally or alternatively be performed by one or more components of the disaggregated RAN architecture (e.g., an IAB node 104, a DU 165, a CU 160, a RU 170, a RIC 175, a SMO 180).

[0061] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or may be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects, such as appliances or vehicles, meters, etc.

[0062] The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc. Figure 1 shown.

[0063] UE 115 and network entity 105 may wirelessly communicate with each other via one or more communication links 125 (e.g., access links) using resources associated with one or more carriers. The term "carrier" may refer to a set of RF spectrum resources having a physical layer structure defined for supporting communication link 125. For example, a carrier used for communication link 125 may comprise a portion of an RF spectrum band (e.g., a bandwidth part (BWP)) operating according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operation, user data, or other signaling. The wireless communication system 100 may support communications with UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between those devices and any portion (e.g., entity, sub-entity) of the network entity 105. For example, the terms "send," "receive," or "communicate" when referring to the network entity 105 may refer to any portion of the network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) of the RAN communicating with another device (e.g., directly or via one or more other network entities 105).

[0064] In some examples, such as in a carrier aggregation configuration, a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute RF Channel Number (EARFCN)) and may be identified according to a channel raster used for discovery by UE 115. A carrier may operate in a standalone mode, in which case initial acquisition and connection by a UE 115 may occur via the carrier, or in a non-standalone mode, in which case a different carrier (e.g., of the same or different radio access technology) is used to anchor the connection.

[0065] The communication link 125 shown in the wireless communication system 100 may include downlink transmissions (e.g., forward link transmissions) from the network entity 105 to the UE 115, uplink transmissions (e.g., return link transmissions) from the UE 115 to the network entity 105, or both, as well as other transmission configurations. A carrier may carry downlink communications or uplink communications (e.g., in an FDD mode) or may be configured to carry both downlink and uplink communications (e.g., in a TDD mode).

[0066] A carrier may be associated with a particular bandwidth of RF spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a set of bandwidths of carriers for a particular radio access technology (e.g., 1.4 megahertz (MHz), 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, 40 MHz, or 80 MHz). Devices of the wireless communication system 100 (e.g., the network entity 105, the UE 115, or both) may have a hardware configuration that supports communications using a particular carrier bandwidth, or may be configured to support communications using one of the set of carrier bandwidths. In some examples, the wireless communication system 100 may include a network entity 105 or a UE 115 that supports concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate using a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0067] The signal waveform transmitted via a carrier wave may include multiple subcarriers (e.g., using a multicarrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In systems employing MCM techniques, a resource element may refer to the resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the modulation scheme order, the modulation scheme coding rate, or both), such that a relatively high number of resource elements (e.g., in the transmission duration) and a relatively high modulation scheme order may correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of RF spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial resources may increase the data rate or data integrity used for communications with UE 115.

[0068] One or more parameter sets for a carrier may be supported, and the parameter set may include subcarrier spacing ( ) and cyclic prefix. A carrier can be divided into one or more BWPs with the same or different parameter sets. In some examples, UE 115 can be configured with multiple BWPs. In some examples, a single BWP for a carrier can be active at a given time, and communications by UE 115 can be constrained to one or more active BWPs.

[0069] The time interval for the network entity 105 or the UE 115 may be expressed in multiples of a basic time unit, which may be, for example, a sampling period. seconds, of which can indicate the supported subcarrier spacing, and The supported discrete Fourier transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each of which has a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0070] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a certain number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a certain number of symbol periods (e.g., depending on the length of the cyclic prefix appended to the front of each symbol period). In some wireless communication systems 100, the time slot may be further divided into a plurality of mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0071] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a Transmit Time Interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0072] Physical channels may be multiplexed using carriers for communication according to various techniques. Physical control channels and physical data channels may be multiplexed for signaling over downlink carriers, for example, using one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a set of symbol periods and may extend across the system bandwidth of a carrier or a subset of that bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of UEs 115 may monitor or search the control region for control information according to one or more search space sets, each of which may include one or more control channel candidates in one or more aggregation levels arranged in a concatenated manner. The aggregation level of a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0073] Network entity 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hotspots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with network entity 105 (e.g., using a carrier) and may be associated with an identifier used to distinguish between adjacent cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other cell identifier). In some examples, a cell may also refer to a coverage area 110 or a portion of coverage area 110 (e.g., a sector) within which the logical communication entity operates. Depending on various factors, such as the capabilities of network entity 105, such cells may range from smaller areas (e.g., structures, subsets of structures) to larger areas. For example, a cell may be or may include a building, a subset of buildings, or an external space between or overlapping coverage areas 110.

[0074] A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to UEs 115 that have a service subscription with a network provider that supports the macro cell. Compared to a macro cell, a small cell may be associated with a lower-power network entity 105 (e.g., a lower-power base station 140), and the small cell may operate using the same or different frequency bands as the macro cell (e.g., licensed, unlicensed). A small cell may provide unrestricted access to UEs 115 that have a service subscription with the network provider, or may provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a closed subscriber group (CSG), UEs 115 associated with users in a home or office). A network entity 105 may support one or more cells and may also use one or more component carriers to support communications via the one or more cells.

[0075] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

[0076] In some examples, network entities 105 (e.g., base stations 140, RUs 170) can be mobile and, therefore, provide communication coverage for mobile coverage areas 110. In some examples, different coverage areas 110 associated with different technologies can overlap, but the different coverage areas 110 can be supported by the same network entity 105. In some other examples, overlapping coverage areas 110 associated with different technologies can be supported by different network entities 105. The wireless communication system 100 can include, for example, a heterogeneous network in which different types of network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.

[0077] The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the network entities 105 (e.g., base stations 140) may have similar frame timing, and transmissions from different network entities 105 may be approximately aligned in time. For asynchronous operation, the network entities 105 may have different frame timing, and in some examples, transmissions from different network entities 105 may not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operation.

[0078] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technologies that allow devices to communicate with each other or with a network entity 105 (e.g., base station 140) without human intervention. In some examples, M2M communication or MTC may include communication from devices with integrated sensors or meters to measure or acquire information and relay this information to a central server or application, which uses the information or presents it to a human interacting with the application. Some UEs 115 may be designed to collect information or enable automated behavior of machines or other equipment. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging. In one aspect, the techniques disclosed herein may be applicable to MTC or IoT UEs. MTC or IoT UEs may include MTC / enhanced MTC (eMTC, also known as CAT-M, Cat M1) UEs, NB-IoT (also known as CAT NB1) UEs, and other UE types. eMTC and NB-IoT may refer to future technologies that may evolve from or be based on these technologies. For example, eMTC may include FeMTC (further eMTC), eFeMTC (further enhanced eMTC), and mMTC (massive MTC), while NB-IoT may include eNB-IoT (enhanced NB-IoT) and FeNB-IoT (further enhanced NB-IoT).

[0079] Some UEs 115 may be configured to employ an operating mode that reduces power consumption, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception, but not concurrent transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power-saving deep sleep mode when not engaged in active communications, operating using limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a guard band of a carrier, or outside a carrier.

[0080] The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). The UE 115 may be designed to support ultra-reliable or low-latency or critical functionality. Ultra-reliable communication may include private or group communications and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functionality may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms "ultra-reliable," "low latency," and "ultra-reliable low latency" are used interchangeably herein.

[0081] In some examples, a UE 115 may be configured to support communication directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 in a group performing D2D communication may be within a coverage area 110 of a network entity 105 (e.g., a base station 140, a RU 170), which may support aspects of such D2D communication configured by (e.g., scheduled by) the network entity 105. In some examples, one or more UEs 115 in such a group may be outside the coverage area 110 of the network entity 105 or may otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system, in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, network entity 105 may facilitate scheduling of resources for D2D communications. In some other examples, D2D communications may be performed between UEs 115 without involving network entity 105.

[0082] In some systems, D2D communication link 135 may be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, vehicles may communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination thereof. Vehicles may signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information relevant to the V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure (such as roadside units) or with the network via one or more network nodes (e.g., network entity 105, base station 140, RU 170) using vehicle-to-network (V2N) communication, or both.

[0083] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130, which may be an evolved packet core (EPC) or a 5G core (5GC), may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets or interconnecting to external networks. The control plane entities may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management, for UEs 115 served by network entities 105 (e.g., base stations 140) associated with the core network 130. User IP packets may be delivered through the user plane entities, which may provide IP address allocation and other functions. The user plane entities may connect to IP services 150 of one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0084] The wireless communication system 100 can operate using one or more frequency bands that can range from 300 megahertz (MHz) to 300 gigahertz (GHz). Generally speaking, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves can be blocked or redirected by buildings and environmental features (which can be referred to as clusters), but these waves can penetrate structures sufficiently for a macrocell to provide service to UEs 115 located indoors. Communication using UHF waves can be associated with smaller antennas and a shorter range (e.g., less than 100 kilometers) compared to communication using the lower frequencies and longer wavelengths in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0085] The wireless communication system 100 may also operate in the very high frequency (SHF) region (also known as the centimeter band) using spectrum in the 3 GHz to 30 GHz range, or in the extremely high frequency (EHF) region (e.g., 30 GHz to 300 GHz), also known as the millimeter band. In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between the UE 115 and the network entity 105 (e.g., base station 140, RU 170), and the EHF antennas of the corresponding devices may be smaller and more closely spaced than UHF antennas. In some examples, such technology may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be subject to even greater attenuation and a shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the frequency band usage specified across these frequency regions may vary by country or regulatory agency.

[0086] The wireless communication system 100 can utilize both licensed and unlicensed RF spectrum bands. For example, the wireless communication system 100 can use unlicensed bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band) to employ Licensed Assisted Access (LAA), LTE Unlicensed (LTE-U) radio access technology, or NR technology. When operating using unlicensed RF spectrum bands, devices such as the network entity 105 and the UE 115 can employ carrier sensing for conflict detection and avoidance. In some examples, operations using the unlicensed bands can be based on a carrier aggregation configuration (e.g., LAA) in conjunction with component carriers operating using licensed bands. Operations using the unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others.

[0087] A network entity 105 (e.g., base station 140, RU 170) or UE 115 may be equipped with multiple antennas that can be used to employ techniques such as transmit diversity, receive diversity, multiple-input, multiple-output (MIMO) communications, or beamforming. The antennas of the network entity 105 or UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located on an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with the network entity 105 may be located at different geographic locations. The network entity 105 may include an antenna array having a set of multiple rows and columns of antenna ports that the network entity 105 may use to support beamforming for communications with the UE 115. Similarly, the UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panels may support RF beamforming for signals transmitted via the antenna ports.

[0088] Network entity 105 or UE 115 can use MIMO communication to exploit multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. This technique may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by a transmitting device via different antennas or different combinations of antennas. Similarly, the multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0089] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting or receiving device (e.g., network entity 105, UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals communicated via antenna elements of an antenna array so that some signals propagating along a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to the signals communicated via the antenna elements can include the transmitting or receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with the device. The adjustments associated with each of these antenna elements can be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting or receiving device or relative to some other orientation).

[0090] The network entity 105 or the UE 115 may use beam sweeping techniques as part of a beamforming operation. For example, the network entity 105 (e.g., base station 140, RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the network entity 105 along different directions. For example, the network entity 105 may transmit signals according to different sets of beamforming weights associated with different transmission directions. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device, such as the network entity 105, or by a receiving device, such as the UE 115) the beam direction for later transmission or reception by the network entity 105.

[0091] Some signals (such as data signals associated with a particular receiving device) may be transmitted by a transmitting device (e.g., transmitting network entity 105, transmitting UE 115) along a single beam direction (e.g., a direction associated with a receiving device (e.g., receiving network entity 105 or receiving UE 115)). In some examples, a beam direction associated with transmission along a single beam direction may be determined based on signals transmitted along one or more beam directions. For example, UE 115 may receive one or more of the signals transmitted along different directions by network entity 105 and may report to network entity 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0092] In some examples, transmission by a device (e.g., by network entity 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from network entity 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across the system bandwidth or one or more subbands. Network entity 105 may transmit reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)), which may or may not be precoded. UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel codebook, a linear combination codebook, a port-selective codebook). Although these techniques are described with reference to signals sent along one or more directions by a network entity 105 (e.g., base station 140, RU 170), UE 115 may use similar techniques to send signals multiple times along different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115), or to send signals along a single direction (e.g., to send data to a receiving device).

[0093] A receiving device (e.g., UE 115) may perform reception operations according to multiple reception configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a receiving device (e.g., network entity 105). For example, the receiving device may perform reception according to multiple reception directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of an antenna array (e.g., different sets of directional listening weights), or processing received signals according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different reception configurations or reception directions. In some examples, the receiving device may use a single reception configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0094] The wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communications at the bearer or PDCP layer may be IP-based. The RLC layer may perform packet segmentation and reassembly for communication via logical channels. The MAC layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also support retransmission using error detection, error correction, or both to improve link efficiency. In the control plane, the RRC layer may provide for the establishment, configuration, and maintenance of RRC connections between the UE 115 and the network entity 105 or core network 130 for radio bearers supporting user plane data. The PHY layer may map transport channels to physical channels.

[0095] UE 115 and network entity 105 may support data retransmission to increase the likelihood of successful data reception. Hybrid Automatic Repeat Request (HARQ) feedback is a technique used to increase the likelihood of correct data reception via a communication link (e.g., communication link 125, D2D communication link 135). HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a particular slot for data received via previous symbols in that slot. In other examples, the device may provide HARQ feedback in a subsequent slot or based on some other time interval.

[0096] In some examples, UE 115 may include a wake-up radio receiver in addition to a primary radio. When UE 115 is in sleep mode, the wake-up radio may monitor for wake-up signals, low-power reference signals (for channel estimation), and / or low-power synchronization signals (for synchronization). The wake-up radio receiver uses less power than the primary radio, and thus, including the wake-up radio conserves power at UE 115 when UE 115 is in sleep mode. A wireless node (e.g., network entity 105 or UE 115) may communicate with a first UE 115 and a second UE 115. The wireless node may wake up the second UE 115 by sending a wake-up signal to the second UE 115, which may then communicate with the wireless node or with another UE 115 via a sidelink. If the second UE 115 is out of range of the wireless node, the wireless node may be unable to send the wake-up signal to the second UE 115. In such an example, the wireless node may send a wake-up signal intended for the second UE 115 to the first UE 115, which may be within range of the wireless node. The first UE 115 may then relay the wake-up signal to the second UE 115. The first UE 115 may send a capability report to the wireless node. Based on the capability report, the wireless node may send a wake-up signal to the first UE 115. The first UE 115 may then send a wake-up signal to the second UE 115. Based on receiving the wake-up signal, the second UE 115 may wake up the primary radio of the second UE 115 for cellular communication (e.g., via a Uu link) or for sidelink communication.

[0097] Figure 2An example of a wireless communication system 200 that supports low power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is illustrated. The wireless communication system may include a first UE 115-a, a second UE 115-b, a third UE 115-c, and a wireless node 205, which may be as described herein (including with reference to Figure 1 The wireless node 205 may communicate with the UE 115 via a cellular communication link 210, which may be a cellular interface (e.g., a Uu link). The UEs 115 may communicate with each other via a sidelink communication link 215, which may be a sidelink interface (e.g., a PC5 link) or a Uu link.

[0098] Each UE 115 may be equipped with a main radio (MR) 220, a low-power wake-up radio (LP-WUR) 225, one or more antennas 230, or any combination thereof. In some examples, the MR 220 may include separate modems for the sidelink interface and the Uu interface (e.g., with some common components, and in some examples, no common components). In some cases where a UE 115 may have both the MR 220 and the LP-WUR 225, the UE 115 may use both radios to transmit signals, both radios to receive signals, one radio to transmit signals and another radio to receive signals, or any combination thereof. The LP-WUR 225 may be associated with a different physical layer (e.g., L1) than the MR 220. In some examples, the LP-WUR 225 may be associated with a different physical layer (e.g., L1, L2, L3, or a combination thereof) than the MR 220.

[0099] In some examples, the LP-WUR 225 may monitor for wake-up signaling (e.g., a wake-up signal (WUS), a low-power reference signal (LP-RS), and / or a low-power synchronization signal (LP-SS)) while the MR 220 is in a sleep state. The wake-up signaling may indicate to the UE 115 to wake up the MR 220 (e.g., for communication via the cellular communication link 210, the sidelink communication link 215, or both). The wake-up signaling may be a low-power wake-up signal (LP-WUS) or a physical downlink control channel-based wake-up signal (PDCCH-WUS). The LP-WUR 225 may use less power than the MR 220, and accordingly, using the LP-WUR 225 saves power at the UE 115 (e.g., allowing the UE 115 to effectively enter a sleep mode without missing transmissions). In some examples, the LP-WUR 225 may be powered separately from the MR 220 and by a block that consumes less power. In some examples, the LP-WUR 225 may wake up the MR 220 when actual communication is required. The LP-WUR 225 can reduce the overall power consumption of the UE 115 by avoiding unnecessary wake-up of the MR 220, which can be associated with higher power consumption. In some examples, the LP-WUR 225 can reduce latency. For example, because the LP-WUR 225 consumes low power, the LP-WUR 225 can monitor for wake-up signaling more frequently, thereby reducing average latency while maintaining low power consumption.

[0100] The wireless node 205 may provide coverage over a first geographic coverage area 235 and a second geographic coverage area 240. The first geographic coverage area 235 may be associated with a PDCCH-WUS. The second geographic coverage area 240 may be associated with a LP-WUS. In some examples, the second geographic coverage area 240 may be smaller than the first geographic coverage area 235. In some cases, the wireless node 205 may not send wake-up signaling to the UE 115-a because the UE 115-a is outside the second geographic coverage area 240 associated with the LP-WUS and may not be able to reliably receive the wake-up signaling from the wireless node 205. A second UE 115-b may be within the second geographic coverage area 240 associated with the LP-WUS and may be able to receive the wake-up signaling from the wireless node 205. The UE 115-b may indicate to the wireless node 205 its ability to send (e.g., relay) wake-up signaling to the UE 115-a.

[0101] Based on receiving the capability indication, the wireless node 205 may send an indication for wake-up signaling to the UE 115-b. In some cases, the UE 115-b may relay (e.g., amplify and forward (AF) or decode and forward (DF)) the wake-up signaling to the UE 115-a. In some cases, the UE 115-b may generate wake-up signaling for transmission to the UE 115-a based on receiving the indication for wake-up signaling from the wireless node 205. Based on receiving the indication, the UE 115-b may send wake-up signaling to the UE 115-a. The wireless node 205 (e.g., the network entity 105 or the UE 115-c) may transmit the indication for wake-up signaling to the UE 115-b (e.g., via a compatible receiver at the UE 115-b, which may be any signal supported by the UE 115-b, such as a wake-up radio signal or MR signaling).

[0102] In some cases, UE 115-b may be within both first geographic coverage area 235 and second geographic coverage area 240. In such cases, wireless node 205 may still relay wake-up signaling for UE 115-a to UE 115-a to further enhance reliability and allow for faster wake-up with fewer errors. Thus, the techniques described herein may include capability signaling for a helper UE 115 (e.g., such as UE 115-b) to support wake-up signaling from the network (e.g., network entity 105) for an LP-WUR assisting UE 115 (e.g., such as UE 115-a).

[0103] In some examples, the wake-up signaling may indicate that UE 115-a is to wake up MR 220 (e.g., a Uu modem) for a Uu link, or may indicate that UE 115-a is to wake up MR 220 for sidelink communication with one or more additional UEs 115 (e.g., including UE 115-b, or a PLC or control unit such as UE 115-c). Communication of the wake-up signaling from UE 115-b to UE 115-a may be performed using dedicated resources. In some cases, these resources are configured and assigned by wireless node 205 (e.g., via a resource grant). In other cases, the resources are discovered and assigned by UE 115-b. UE 115-b may transmit a WUS during a low-power opportunity. In some examples, there may be a low-power monitoring opportunity configured for Uu communication, sidelink communication, or both. In some examples, the Uu opportunity and the sidelink opportunity may be the same opportunity. Additionally, there may be additional monitoring opportunities for LP-RS and LP-SS. For example, resources may be configured or may be dedicated resources or grants on which information regarding wake-up signaling (e.g., LP-WUS, LP-RS, LP-SS) is transmitted to one or more UEs 115-c. The resources used by UE 115-b to send wake-up signaling to UE 115-a may be assigned or configured by wireless node 205 (e.g., network entity 105 or UE 115-c). That is, even for sidelink wake-up signaling, resources may be assigned by network entity 105 or a sidelink control device (such as UE 115-c). In some examples, resources may be assigned, found, or configured by helper UE 115-b. In such examples, UE 115-b may indicate the configured opportunities (e.g., which may be referred to as low-power opportunities or WUS monitoring opportunities). LP-WUS monitoring opportunities may be allocated for the Uu link, LP-WUS monitoring opportunities for the sidelink, or a single set of monitoring opportunities. Different monitoring opportunities may be configured for LP-SS, LP-RS, WUS, etc.

[0104] For example, a first subset of resources may be allocated for waking up the Uu modem, and a second subset of resources may be allocated for waking up the sidelink modem. The first subset of resources and the second subset of resources may be completely separated in time, frequency, or both, or may at least partially overlap in time, frequency, or both. If wake-up signaling is transmitted via the first subset of resources, the UE 115-a may wake up the Uu modem, and if wake-up signaling is transmitted via the second subset of resources, the UE 115-a may wake up the sidelink modem.

[0105] In some examples, UE 115-c may act as a primary sidelink UE for UE 115. In such examples, UE 115-b may indicate capability information to UE 115-c via connection link 215-b. Based on receiving the indication of capability information, UE 115-c may indicate wake-up signaling to UE 115-b. Upon receiving the indication of wake-up signaling, UE 115-b may transmit wake-up signaling to UE 115-a. In some cases, UE 115-c may allocate resources for transmitting and receiving wake-up signaling for UE 115-b. In some other cases, these resources are discovered and assigned by UE 115-b.

[0106] In some examples, UE 115-b may indicate (e.g., in capability signaling transmitted to wireless node 205 or UE 115-c, or both) support for a compatible receiver capable of communicating with an LP-WUR assisted UE 115 (e.g., UE 115-a). Such compatibility may allow UE 115-b to receive signals transmitted from an LP-WUR transmitter (e.g., if UE 115-a has an LP-WUR capable of sending wake-up signaling to UE 115-b). As described in reference Figure 3 Described in more detail, UE 115-a may be able to send feedback signaling or requests (e.g., such as a request to change the configuration for one or more low-power signals) to one or more helper UEs 115 (e.g., UE 115-b). The requested changes to the configuration for one or more low-power signals may include requested updates to repetition, transmit power, periodicity, waveform, modulation, etc. In some examples, UE 115-a may send such requests or feedback information to UE 115-b based on the reported ability of UE 115-b to receive LP-WUR signaling (e.g., using LP-WUR at UE 115-a). In some examples, UE 115-a may send such requests or feedback information to wireless node 205 (e.g., if UE 115-b does not support receiving signals sent by LP-WUR). In such examples, the network may notify UE 115-b of the requested changes to the wake-up signaling configuration. UE 115 - a may transmit such request and feedback signaling to wireless node 205 via MR 220 or via LP-WUR 225 with transmission capabilities.

[0107] In some examples, wake-up signaling (e.g., LP-WUS, LP-RS, LP-SS) can be designed with different modulations and waveforms (e.g., for different use cases). The waveform can be a single-tone wave (e.g., a sine wave) or a multi-tone wave (e.g., an OFDM-based waveform). The modulation used can be on-off keying (OOK), amplitude shift keying (ASK), frequency shift keying (FSK), phase shift keying (PSK), Zadoff Chu, discrete Fourier transform (DFT), Walshi / Hadamard, Gold, Reed-Solomon, m-sequence, or Chirp, among others. In some examples, modulation can occur in the time domain, frequency domain, or both. For example, the LP-WUS can be an OOK signal, a sequence-based signal, or a decoded signal (e.g., a PDCCH-based DCI). LP-RS and LP-SS can be OOK signals, sequence-based signals, or signals similar to single sideband (SSB), channel state information reference signal (CSI-RS), sounding reference signal (SRS), positioning reference signal (PRS), tracking reference signal (TRS), or phase tracking reference signal (PTRS) in new radio (NR) or long-term evolution (LTE) communication systems. For OOK-based and ASK-based waveform designs, Manchester codes can be used to simplify receiver implementation and improve interference resistance. For example, forward error correction codes and other channel codes can be applied to the waveforms to achieve higher reliability.

[0108] In some examples, UE 115-b (e.g., or UE 115-a, or both) may report capability information for transmitting specific types of signaling (such as LPWUS, LP-RS, LP-SS, or any combination thereof) (e.g., or may indicate which types of wake-up signaling UE 115-b supports or does not support forwarding or sending to UE 115-a). In some examples, such capability signaling may be dynamic over time, with some signals or configurations being activated or deactivated. As described herein, the wake-up signaling (e.g., LP-WUS, LP-RS, LP-SS, etc.) may be OOK-based or may be OFDM-based waveforms.

[0109] In some examples, such as reference Figure 3As described in more detail, UE 115-a may be provided with a list of potential (e.g., candidate) helper UEs 115 (e.g., including UE 115-b). In some examples, UE 115-a may determine or receive the list of helper UEs 115 with the assistance of wireless node 205, a control unit or PLC (such as UE 115-c), or a combination thereof. Before entering sleep mode, UE 115-a may receive an indication of the list and may monitor resources used by the indicated helper UEs 115 (e.g., using LP-WUR 225). Resources associated with helper UEs 115 may be indicated via the list of candidate helper UEs 115 or may be otherwise configured at UE 115-a (e.g., via separate control signaling, configuration information, etc., as described herein). The list may support a UE 115-a while monitoring for wake-up signaling for the Uu link, the sidelink, or both (e.g., two separate lists may be configured to indicate helper sidelink UEs 115 and helper Uu UEs 115, a single list may indicate all helper UEs 115 for all available links, or a list of helper UEs may be configured in conjunction with resource configurations associated with different lists, etc.).

[0110] In some examples, UE 115-a, UE 115-b, or both may support discontinuous transmission (DTX) and reception (DRX) operations. Network entity 105-a may configure UE 115 with a DRX configuration (e.g., DRX may refer to both DRX and DTX operations). DRX operations may include an active time (e.g., a period during which signals may be transmitted, received, or both) and a cycle duration (e.g., the periodicity of the active time). During the DRX active time, UE 115-a may transmit wake-up signaling (e.g., LP-WUS, other low-power signaling) to UE 115-b according to the signaling periodicity. In some cases, some signals (e.g., LP-SS, LP-RS) may be unbundled from DRX operations. In some other cases, such signals may be associated with another DRX operation (e.g., a DRX cycle or configuration specific to certain types of wake-up signaling, such as LP-SS, LP-RS, or both).

[0111] In some examples, UE 115-a (e.g., or UE 115-b, or both) may report capability information for supporting DRX operation at the LP-WUR. In some examples, such capability signaling may be dynamic over time. The DRX configuration information may be indicated in a class message (e.g., WUR class, a UE class including a WUR class may include such DRX-related information). Additionally or alternatively, the DRX configuration information may be associated with a specific clock or clock condition (e.g., clock accuracy), which may be a function of an RRC state, a power state, a power saving state of MR 220, a power saving state of LP-WUR 225, or any combination thereof. The capability information may be transmitted via MR 220 or via a LP-WUR 225 having the ability to transmit.

[0112] UE 115-a may receive wake-up signaling from UE 115-b based on a DRX cycle. The DRX cycle and associated clock accuracy may be selected based on capability information of UE 115-a and capability information of UE 115-b. In some cases, the DRX cycle may be associated with a DTX cycle, which may be further associated with UE 115-b, wireless node 205, or UE 115-c. In some cases, UE 115 may negotiate DRX and DTX configurations based on capability information. In some other cases, wireless node 205 may select a configuration based on capability information. Additionally or alternatively, wireless node 205 may determine multiple configurations, and UE 115 may select a configuration based on static or dynamic capability information (e.g., or both) of UE 115.

[0113] In some examples, LP-WUR signaling and PDCCH-based signaling may be associated with the same coverage area (e.g., may have similar effectiveness for UE 115-a and UE 115-b), and LP signaling by helper UE 115-b may still enhance reliability and enable faster wakeup (e.g., resulting in reduced errors). In some examples, even in situations where wireless node 205 is capable of sending wakeup signaling to UE 115-a, wireless node 205 may utilize helper UE 115-b to relay or send wakeup signaling to UE 115-a, which may enhance the reliability of the wakeup signaling. Figure 3 An example of a process flow 300 for supporting low power wake-up radio signaling in wireless communications according to aspects of the present disclosure is illustrated. The process flow 300 may be implemented as shown in FIG. Figure 1 and Figure 2 Various aspects of the wireless communication system 100 and the wireless communication system 200 are described. For example, Figure 3In the example of FIG. 1 , the wireless node 305 may communicate with one or more UEs 115 (eg, UEs 115 - d and 115 - e ), which may be located in one or more coverage areas (eg, cells), as described with reference to FIG. Figure 1 and Figure 2 The wireless node 305 may be as described in reference Figure 1 and Figure 2 The wireless node 305 may communicate with the UE 115 via corresponding communication links, which may be as described in reference Figure 2 Examples of the communication links 210 described. In addition, the UEs 115 can communicate with each other via corresponding communication links, which can be referenced Figure 2 In the following description of the process flow 300, operations between the wireless node 305, the first UE 115-d, and the second UE 115-e may be sent in a different order than the example order shown, or the operations between the wireless node 305, the first UE 115-d, and the second UE 115-e may be performed in a different order or at a different time. Some operations may also be omitted from the process flow 300, and other operations may be added to the process flow 300.

[0114] At 335, the UE 115-e transmits an indication of capability information (e.g., a capability report) to the wireless node 305. The capability report may indicate the UE 115-e's ability to transmit an LP-WUS to the UE 115-d (e.g., the ability to send the LP-WUS using L1 / L2 / L3 signaling). Additionally, the capability report may include an indication of the UE 115-e's ability to receive low-power signals. The capability report may indicate whether the UE 115-e supports forwarding any or all wake-up signaling, or may specifically indicate whether the UE 115 supports transmitting a particular type of wake-up signaling (e.g., WUS, LP-RS, LP-SS, or any combination thereof). In some examples, the capability report may indicate whether the UE 115-e is capable of operating the MR 220 or the LP-WUR 225, either individually or together. The UE 115-e may report the UE's capabilities for different frequency bands, frequency band combinations, carrier combinations, or any combination thereof (e.g., the ability to operate one or both radios, either individually or together). The capability report may be transmitted using the MR 220 or LP-WUR 225 of the UE 115-e. The capability report may be included in an initial registration message, a random access message (e.g., msg1 or msg3 in a 4-step random access channel (RACH) procedure, or msgA in a 2-step RACH procedure), a radio resource control message (e.g., between UEs or during an RRC connection between the UE 115-e and a network entity), using L1, L2, or L3 signaling in sidelink communications (e.g., to other UEs 115, a control unit, a PLC, or a primary UE), or via a Uu link (e.g., to the network entity 105), or any combination thereof. The capability report may be dynamic (e.g., may change over time) and may be based on the current power state of the UE 115-e.

[0115] The capability information may indicate whether the UE 115-e is capable of performing both LP-WUR signaling and MR signaling simultaneously. The capability report may indicate whether the UE 115-e supports both LP-WUR signaling and MR signaling simultaneously, whether the UE 115-e can transmit via two circuits or whether it can receive from two circuits, whether the UE 115-a supports receiving via one circuit and transmitting via another circuit, or whether the UE 115-e supports both MR and LP-WUR but not simultaneous LP-WUR signaling and MR signaling, or any combination thereof. As described herein, capability signaling (e.g., indicating whether the UE 115-e supports only LP-WUR or supports both MR and LP-WUR) may be per frequency band, per carrier, per frequency band combination, per carrier combination, per frequency range, or any combination thereof. In some instances, multiple UEs 115 (e.g., including UE 115-d) may send the capability report described at 335.

[0116] At 340, the wireless node 305 transmits an indication of wake-up signaling to the UE 115-e. The wireless node 305 may select a configuration for the wake-up signaling based on the last reported battery level of the UE 115-d, the energy state profile of the UE 115-d, the charge state profile of the UE 115-d, the discharge rate profile of the UE 115-d, or the last known location of the UE 115-d (e.g., location information such as a positioning reference signal), or any combination thereof. In some examples, the UE 115-d, the UE 115-e, or both may provide such location information (e.g., or power and charging information) via the location information at 330, the preferred WUS configuration information at 310, or via other reporting or control signaling. The indication may include additional parameters for sending the wake-up signaling to the UE 115-e. These parameters may include a repetition factor, transmit power, period, waveform, modulation and coding scheme, or any combination thereof.

[0117] At 345, UE 115-e sends wake-up signaling to UE 115-d. UE 115-e may send the wake-up signaling based on the parameters received in the indication from wireless node 305. As described herein, the wake-up signaling may include an LP-WUS or a PDCCH-WUS. Furthermore, the wake-up signaling may indicate to UE 115-d to wake up MR 220 for Uu communication, for sidelink communication, or for both.

[0118] At 350, UE 115-d may request to update parameters associated with the WUS before entering sleep mode. The request to update the parameters may include a feedback message, a feedback request, a lower-power signal configuration change request, or any combination thereof. In some cases, UE 115-d may send a request to update the parameters to UE 115-e. In such cases, UE 115-d may send the request based on receiving an indication (e.g., from UE 115-e as part of a capability report, or from the wireless node 305, or a combination thereof) that UE 115-e is capable of receiving low-power signals. In some other cases, UE 115-d may send the request to update the parameters to the wireless node 305 based on not receiving an indication (as part of a capability report) that UE 115-e is capable of receiving low-power signals. In such examples, at 355, the wireless node 305 may transmit the updated parameters to UE 115-d based on receiving the request to update the parameters associated with the WUS from UE 115-d. At 360 , UE 115 - e may again transmit wake-up signaling to UE 115 - e based on receiving the request from UE 115 - d to update parameters associated with the wake-up signaling.

[0119] In some examples, UE 115-d may provide configuration or recommendation information. For example, at 310, UE 115-d may send an indication of a preferred configuration (e.g., waveform, modulation, coding) for low-power signaling to wireless node 305. In some cases, UE 115-d may transmit the indication using MR 220 (via a sidelink, cellular link, or both). UE 115-d may transmit the indication via L1 / L2 / L3 signaling before entering sleep (e.g., UE 115-d may transmit the indication before entering an RRC inactive or idle state). In some other cases, UE 115-d may transmit the indication using LP-WUR 225. UE 115-d may transmit the indication to wireless node 305. Additionally or alternatively, UE 115-d may transmit the indication to UE 115-e if UE 115-e has indicated that UE 115-e is capable of receiving low-power signals. In some examples, UE 115 - e may send wake-up signaling to UE 115 - d at 345 based on the preferred configuration indicated at 310 .

[0120] In some examples, UE 115-d may indicate (e.g., via preferred WUS configuration information) the ability of UE 115-d to operate MR 220 or LP-WUR 225, alone or in combination. The operation of the radio may vary for different frequency bands, frequency band combinations, carrier combinations, or any combination thereof. In some examples, UE 115-e may indicate the frequency bands, frequency band combinations, carrier combinations, etc., in which UE 115-e supports operation of MR 220, LP-WUR 225, or both. UE 115-e may similarly report the ability of UE 115-e to operate MR 220, LP-WUR 225, or both. Additionally or alternatively, UE 115-d (e.g., or UE 115-e) may transmit a wake-up signal recommendation (e.g., a configuration recommendation) for MR 220, LP-WUR 225, or both. In such an example, the wireless node 305 may configure the wake-up signaling based on the recommendation transmitted from the UE 115-d and may send the wake-up signaling to the UE 115-d according to the configuration parameters selected at 310. Before the UE 115-d enters the sleep mode, the UE 115-d may indicate a preferred WUS configuration (e.g., waveform, modulation, coding, etc. for each type of low power wake-up signaling) using L1, L2, or L3 signaling via the MR (e.g., sidelink, Uu link, or both) before the UE 115-d enters the RRC inactive or idle state, via the LP-WUR transmitter side (e.g., to the wireless node 305), or via the LP-WUR to the UE 115-e (e.g., to another UE 115 having a compatible modem that can receive the LP-WUR transmitted signal).

[0121] In some examples, the UE 115 - e may transmit a recommendation regarding each type of wake-up signaling for each radio (eg, LP-WUR and MR), and the wireless node 305 may configure the wake-up signaling based on the recommendation.

[0122] In some examples, the wireless node 305 may calculate the distance of the UE 115-d and may send wake-up signaling at 340 to relay to the UE 115-d based on the calculated distance. For example, at 315, the UE 115-d may transmit a reference signal to the wireless node 305 before entering sleep mode. In some cases, the UE 115-d may use the LP-WUR 225 to transmit a reference signal (e.g., a sounding reference signal (SRS), a positioning reference signal (PRS), or another type of reference signal for wake-up signaling forwarding) to the wireless node 305. In some other cases, the UE 115-d may use the MR 220 to transmit a reference signal (e.g., a sounding reference signal) to the wireless node 305 before placing the MR 220 in a sleep state. Additionally or alternatively, the wireless node 305 may utilize the reference signal to determine location or mobility information of the UE 115-d. For example, the wireless node 305 may determine mobility information indicating the location of the UE 115-d, the direction of the UE 115-d, the speed of the UE 115-d, or any combination thereof. Additionally or alternatively, the wireless node 305 may utilize prediction techniques to determine whether the UE 115-d is leaving the coverage area, moving closer to the cell, moving away from the cell center, or any combination thereof. In some examples, the UE 115-e may receive reference signals and forward these reference signals to the wireless node 305, or may send mobility information to the wireless node. The wireless node may use the received reference signals to perform CSI measurements for the UE 115-d. In some examples, the wireless node 305 may configure the radio of the UE 115-d. Both the MR 220 and the LP-WUR 225 may be configured using L1 / L2 / L3 signaling. The configuration may include power control adjustments. Based on determining the location or mobility information of the UE 115-d, the wireless node 305 may select a WUS type (e.g., LP-WUS, PDCCH-WUS) to transmit to the UE 115-d. The WUS selection may be based on measurements performed on the reference signal received in step 315. The wireless node 305 may change the WUS selection over time.

[0123] In some examples, the wireless node 305 may provide configuration information to the UE 115-d and may send wake-up signaling in 340 based on the configuration information. For example, at 320, the UE 115-d may receive an indication of a set of candidate UEs 115 before entering sleep mode. Each UE 115 in the set of candidate UEs may be capable of sending wake-up signaling to the UE 115-d. The set of candidate UEs 115 may include the UE 115-e. Based on receiving the indication, the UE 115-d may monitor the resources used by the UE 115 during the low-power monitoring opportunity to detect the wake-up signaling. The UE 115-d may receive the indication from the wireless node 305 or the UE 115-e.

[0124] In some examples, the wireless node 305 may support only LP-WUS, only PDCCH-based wake-up signaling, activated or deactivated LP-SS signaling, activated or deactivated LP-RS signaling, or any combination thereof based on a network power save mode (e.g., based on the power state at the wireless node 305). In some examples, the wireless node 305 may transmit an indication of the current operating mode to the UE 115-d. The wireless node 305 may select the operating mode based on the current power state of the wireless node 305. The indication of the operating mode may include an indication of what type of WUS (e.g., LP-WUS or PDCCH-WUS) the wireless node 305 currently supports. Additionally, the indication may also include an indication of whether the wireless node 305 supports both LP-RS and LP-SS, a duration until the wireless node 305 switches to another operating mode, an indication of the next operating mode, or any combination thereof. The wireless node 305 may transmit the indication to the UE 115-d using L1, L2, or L3 signaling (e.g., in msg2, msg4, msgB, or in a master information block (MIB), system information block (SIB)). In some examples, the wireless node 305 may send the indication of the current or subsequent mode periodically or aperiodically.

[0125] In some examples, the wireless node 305 may send wake-up signaling to relay to the UE 115-d based on the location of the UE 115-d at 340. For example, the wireless node 305 may indicate a configuration table to the UE 115-d at 325. The configuration table may include a location, a threshold distance from the wireless node 305, a reference signal resource pool (RSRP), path loss, and coverage of multiple LP-WUS configurations (e.g., repetition, periodicity, waveform, modulation and coding scheme, or a combination thereof).

[0126] At 330, UE 115-d may indicate location information to wireless node 305. For example, UE 115-d may transmit a request to wireless node 305 for a particular low power signal configuration based on receiving an indication of the configuration table. UE 115-d may determine a low power signal configuration to use based on the location of UE 115-d. For example, UE 115-d may select a particular configuration based on UE 115-d meeting a threshold distance of the configuration table. Additionally or alternatively, UE 115-d may indicate to wireless node 305 that UE 115-d is leaving a coverage area associated with an LP-WUS and entering a coverage area associated with a PDCCH-WUS. In some examples, the wireless node 305 may avoid sending wake-up signaling at 340 based on an indication that UE 115-d has entered the coverage area associated with the PDCCH-WUS, or may send wake-up signaling at 340 based on an indication that UE 115-d has left the coverage area associated with the PDCCH-WUS.

[0127] Figure 4 A block diagram 400 illustrates a device 405 supporting low-power wake-up radio in wireless communications according to one or more aspects of the present disclosure. The device 405 may be an example of aspects of the UE 115 as described herein. The device 405 may include a receiver 410, a transmitter 415, and a communication manager 420. The device 405 may also include at least one processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0128] Receiver 410 may provide means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to low-power wake-up radio signaling in wireless communications). The information may be delivered to other components of device 405. Receiver 410 may utilize a single antenna or a collection of multiple antennas.

[0129] Transmitter 415 may provide means for transmitting signals generated by other components of device 405. For example, transmitter 415 may transmit information associated with various information channels (e.g., control channels, data channels, information channels related to low-power wake-up radio signaling in wireless communications), such as packets, user data, control information, or any combination thereof. In some examples, transmitter 415 may be co-located with receiver 410 in a transceiver module. Transmitter 415 may utilize a single antenna or a collection of multiple antennas.

[0130] The communication manager 420, the receiver 410, the transmitter 415, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of low-power wake-up radio signaling in wireless communications as described herein. For example, the communication manager 420, the receiver 410, the transmitter 415, or various combinations thereof, or components thereof, may support methods for performing one or more of the functions described herein.

[0131] In some examples, the communication manager 420, the receiver 410, the transmitter 415, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include at least one processor, at least one digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting means for performing the functions described herein. In some examples, at least one processor and a memory coupled to the at least one processor may be configured to perform one or more of the functions described herein (e.g., the memory stores instructions for the at least one processor).

[0132] Additionally or alternatively, in some examples, communication manager 420, receiver 410, transmitter 415, or various combinations or components thereof may be implemented in code executed by at least one processor (e.g., as communication management software). If implemented in code executed by at least one processor, the functionality of communication manager 420, receiver 410, transmitter 415, or various combinations or components thereof may be performed by at least one general-purpose processor, DSP, CPU, GPU, ASIC, FPGA, microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting components for performing the functionality described in this disclosure).

[0133] In some examples, communication manager 420 can be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise coordinating with receiver 410, transmitter 415, or both. For example, communication manager 420 can receive information from receiver 410, transmit information to transmitter 415, or otherwise integrate with receiver 410, transmitter 415, or both to obtain information, output information, or perform various other operations as described herein.

[0134] According to examples disclosed herein, the communication manager 420 can support wireless communications. For example, the communication manager 420 can be configured as or otherwise support means for a first UE to transmit capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio. The communication manager 420 can be configured as or otherwise support means for receiving wake-up signaling from the wireless device based on the transmitted capability information. The communication manager 420 can be configured as or otherwise support means for transmitting wake-up signaling to a wake-up radio of the second UE.

[0135] Additionally or alternatively, the communication manager 420 may support wireless communications according to examples as disclosed herein. For example, the communication manager 420 may be configured as or otherwise support means for receiving control signaling including one or more parameters for a second UE associated with a wake-up radio to receive wake-up signaling from a first UE. The communication manager 420 may be configured as or otherwise support means for monitoring wake-up signaling based on one or more parameters. The communication manager 420 may be configured as or otherwise support means for receiving wake-up signaling from a wireless device via the first UE based on the monitoring.

[0136] By including or configuring a communication manager 420 according to examples as described herein, the device 405 (eg, at least one processor controlling or otherwise coupled with the receiver 410 , transmitter 415 , communication manager 420 , or a combination thereof) may support techniques for reducing power consumption.

[0137] Figure 5 A block diagram 500 illustrates a device 505 that supports low-power wake-up radio in wireless communications according to one or more aspects of the present disclosure. The device 505 can be an example of aspects of the device 405 or UE 115 as described herein. The device 505 can include a receiver 510, a transmitter 515, and a communication manager 520. The device 505 can also include at least one processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0138] Receiver 510 may provide means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to low-power wake-up radio signaling in wireless communications). The information may be delivered to other components of device 505. Receiver 510 may utilize a single antenna or a collection of multiple antennas.

[0139] Transmitter 515 may provide means for transmitting signals generated by other components of device 505. For example, transmitter 515 may transmit information associated with various information channels (e.g., control channels, data channels, information channels related to low-power wake-up radio signaling in wireless communications), such as packets, user data, control information, or any combination thereof. In some examples, transmitter 515 may be co-located with receiver 510 in a transceiver module. Transmitter 515 may utilize a single antenna or a collection of multiple antennas.

[0140] Device 505 or its various components may be examples of components for performing various aspects of low-power wake-up radio signaling in wireless communications as described herein. For example, communications manager 520 may include capability message component 525, wake-up message component 530, monitoring component 535, or any combination thereof. Communications manager 520 may be an example of aspects of communications manager 420 as described herein. In some examples, communications manager 520 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise coordinating with receiver 510, transmitter 515, or both. For example, communications manager 520 may receive information from receiver 510, transmit information to transmitter 515, or be integrated with receiver 510, transmitter 515, or both to obtain information, output information, or perform various other operations as described herein.

[0141] According to examples disclosed herein, the communication manager 520 can support wireless communications. The capability message component 525 can be configured as or otherwise support means for a first UE to transmit capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio. The wake-up message component 530 can be configured as or otherwise support means for receiving wake-up signaling from the wireless device based on the transmitted capability information. The wake-up message component 530 can be configured as or otherwise support means for transmitting wake-up signaling to a wake-up radio of the second UE.

[0142] Additionally or alternatively, the communications manager 520 can support wireless communications according to examples as disclosed herein. The capabilities message component 525 can be configured as or otherwise support means for receiving control signaling including one or more parameters for a second UE associated with a wake-up radio to receive wake-up signaling from a first UE. The monitoring component 535 can be configured as or otherwise support means for monitoring wake-up signaling based on one or more parameters. The monitoring component 535 can be configured as or otherwise support means for receiving wake-up signaling from a wireless device via the first UE based on the monitoring.

[0143] Figure 6 Block diagram 600 illustrates a communication manager 620 that supports low-power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure. Communication manager 620 can be an example of communication manager 420, communication manager 520, or aspects of both as described herein. Communication manager 620 or its various components can be examples of components for performing various aspects of low-power wake-up radio signaling in wireless communications as described herein. For example, communication manager 620 can include a capability message component 625, a wake-up message component 630, a monitoring component 635, a wake-up parameter component 640, a location component 645, a reference signal component 650, or any combination thereof. Each of these components can communicate with each other directly or indirectly (e.g., via one or more buses).

[0144] According to examples disclosed herein, the communication manager 620 can support wireless communications. The capability message component 625 can be configured as or otherwise support means for a first UE to transmit capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio. The wake-up message component 630 can be configured as or otherwise support means for receiving wake-up signaling from the wireless device based on the transmitted capability information. In some examples, the wake-up message component 630 can be configured as or otherwise support means for transmitting wake-up signaling to a wake-up radio of the second UE.

[0145] In some examples, the wake-up parameter component 640 may be configured as or otherwise support a component for receiving one or more parameters for sending wake-up signaling to a second UE, the one or more parameters comprising a repetition factor, a transmit power, a periodicity, a waveform, a modulation and coding scheme, or any combination thereof, wherein sending the wake-up signaling is based on the one or more parameters.

[0146] In some examples, the wake-up parameter component 640 can be configured as or otherwise support means for receiving a request to update one or more parameters from the second UE based at least in part on an indication in the capability information that the first UE is capable of receiving wake-up radio signaling from the second UE.

[0147] In some examples, the wake-up parameter component 640 may be configured as or otherwise support means for receiving an update of one or more parameters from a wireless device based on an indication in capability information that the first UE is unable to receive wake-up radio signaling from a second UE, where the wireless device includes a network entity.

[0148] In some examples, the capability message component 625 may be configured as or otherwise support a component for sending an indication of one or more wake-up message types that the first UE is capable of sending via capability information, the one or more wake-up message types comprising a wake-up signal, a wake-up reference signal, a synchronization signal, or any combination thereof, wherein sending the wake-up signaling comprises sending one of the wake-up message types sent via the capability information.

[0149] In some examples, to support sending wake-up signaling, the wake-up message component 630 may be configured as or otherwise support a component for sending wake-up signaling to a wake-up radio of a second UE, the wake-up signaling indicating that the second UE will wake up the second UE's primary radio to communicate wirelessly via a first radio access technology in a set of multiple radio access technologies supported by the second UE, wherein the wake-up signaling includes a first waveform in a set of multiple waveforms corresponding to a corresponding radio access technology in the set of multiple radio access technologies, or the wake-up signaling is sent via a first resource set in a set of multiple resource sets corresponding to a corresponding radio access technology in the set of multiple radio access technologies.

[0150] In some examples, the capability message component 625 may be configured as or otherwise support means for sending, via capability information, an indication that the first UE is capable of supporting a wake-up radio, or both a wake-up radio and a primary radio for a set of frequency resources, an indication of one or more candidate parameters for wake-up signaling corresponding to the wake-up radio, the primary radio, or both, or any combination thereof.

[0151] In some examples, the location component 645 can be configured as or otherwise support means for sending an indication of a threshold distance from the wireless device corresponding to wake-up signaling to a second UE, where receiving the wake-up signaling from the wireless device satisfies the threshold distance based on the location of the second UE.

[0152] In some examples, to support sending capability information, capability message component 625 may be configured as or otherwise support means for sending an initial registration message, a random access message, a radio resource control message, or any combination thereof to a wireless device, where the wireless device includes a network entity.

[0153] In some examples, to support sending capability information, the capability message component 625 may be configured as or otherwise support means for sending a sidelink control information message, a sidelink radio resource control message, or any combination thereof to a wireless device, wherein the wireless device includes a primary sidelink UE.

[0154] In some examples, sending the capability information is based on a power level or charging rate at the first UE meeting a threshold.

[0155] Additionally or alternatively, the communication manager 620 can support wireless communications according to examples as disclosed herein. In some examples, the capability message component 625 can be configured as or otherwise support means for receiving control signaling including one or more parameters for a second UE associated with a wake-up radio to receive wake-up signaling from a first UE. The monitoring component 635 can be configured as or otherwise support means for monitoring wake-up signaling based on one or more parameters. In some examples, the monitoring component 635 can be configured as or otherwise support means for receiving wake-up signaling from a wireless device via the first UE based on the monitoring.

[0156] In some examples, the one or more parameters include a repetition factor, a transmit power, a periodicity, a waveform, a modulation and coding scheme, or any combination thereof. In some examples, receiving the wake-up signaling is based on the one or more parameters.

[0157] In some examples, the wake-up parameter component 640 can be configured as or otherwise support means for sending a request for one or more parameters to the wireless device or first UE prior to entering sleep mode, wherein receiving the one or more parameters is based on sending the request.

[0158] In some examples, to support sending a request for one or more parameters, the wake-up parameter component 640 may be configured as or otherwise support a component for sending an indication of one or more candidate parameters including one or more parameters based on the current location of the second UE, the power state of the second UE, the charging rate profile at the second UE, or any combination thereof.

[0159] In some examples, wake-up parameter component 640 can be configured as or otherwise support means for sending a request to the wireless device or first UE to update one or more parameters. In some examples, wake-up parameter component 640 can be configured as or otherwise support means for receiving an update of the one or more parameters from the wireless device or first UE based on sending the request. In some examples, wake-up parameter component 640 can be configured as or otherwise support means for receiving additional wake-up signaling from the first UE based on the update of the one or more parameters.

[0160] In some examples, to support receiving wake-up signaling, the wake-up message component 630 may be configured as or otherwise support a component for receiving wake-up signaling using a wake-up radio of the second UE, the wake-up signaling indicating that the second UE is to wake up a primary radio of the second UE to wirelessly communicate via a first radio access technology in a set of multiple radio access technologies supported by the second UE, wherein the wake-up signaling includes a first waveform in a set of multiple waveforms corresponding to a corresponding radio access technology in the set of multiple radio access technologies, or the wake-up signaling is sent via a first resource set in a set of multiple resource sets corresponding to a corresponding radio access technology in the set of multiple radio access technologies.

[0161] In some examples, the one or more parameters include an indication of a set of multiple radio access technologies, a set of multiple resource sets, a set of multiple waveforms, or any combination thereof.

[0162] In some examples, the monitoring component 635 may be configured as or otherwise support means for receiving, from a wireless device or a first UE, an indication of a set of candidate UEs including the first UE, each candidate UE in the set of candidate UEs being capable of relaying wake-up signaling to a second UE, wherein the monitoring is based on the indication of the set of candidate UEs.

[0163] In some examples, the capability message component 625 may be configured as or otherwise support a component for sending capability information indicating that the second UE is capable of receiving wireless signaling via the wake-up radio, or both the wake-up radio and the primary radio, for a set of frequency resources, the capability information also including an indication of one or more candidate parameters for wake-up signaling corresponding to the wake-up radio, the primary radio, or both, or any combination thereof.

[0164] In some examples, the reference signal component 650 may be configured as or otherwise support means for sending one or more reference signals to a wireless device prior to entering a sleep mode, the wireless device comprising a network entity, wherein receiving wake-up signaling from the wireless device via the first UE is based on sending the one or more reference signals.

[0165] In some examples, the location component 645 can be configured as or otherwise support means for sending mobility information to the wireless device indicating a location of the second UE, a direction of the second UE, a speed of the second UE, an indication that the UE is leaving a coverage area, or any combination thereof, where receiving wake-up signaling from the wireless device via the first UE is based on sending the mobility information.

[0166] In some examples, the wireless device includes a network entity or a sidelink UE.

[0167] Figure 7 A diagram illustrates a system 700 including a device 705 that supports low-power wake-up radio signaling in wireless communications, according to one or more aspects of the present disclosure. Device 705 may be an example of, or include components of, device 405, device 505, or UE 115, as described herein. Device 705 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. Device 705 may include components for two-way voice and data communications, including components for sending and receiving communications, such as a communications manager 720, an input / output (I / O) controller 710, a transceiver 715, an antenna 725, memory 730, code 735, and at least one processor 740. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, or electrically) via one or more buses (e.g., bus 745).

[0168] I / O controller 710 can manage input and output signals for device 705. I / O controller 710 can also manage peripheral devices that are not integrated into device 705. In some cases, I / O controller 710 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 710 can utilize an operating system such as iOS. ® ANDROID ® , MS-DOS ® 、MS-WINDOWS ® , OS / 2 ® , UNIX ® 、LINUX ® or another known operating system. Additionally or alternatively, I / O controller 710 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 710 may be implemented as part of at least one processor, such as processor 740. In some cases, a user may interact with device 705 via I / O controller 710 or via hardware components controlled by I / O controller 710.

[0169] In some cases, the device 705 may include a single antenna 725. However, in some other cases, the device 705 may have more than one antenna 725, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 715 may communicate bidirectionally via one or more antennas 725, wired, or wireless links, as described herein. For example, the transceiver 715 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 715 may also include a modem for modulating packets; providing the modulated packets to the one or more antennas 725 for transmission; and demodulating packets received from the one or more antennas 725. The transceiver 715, or the transceiver 715 and the one or more antennas 725, may be examples of the transmitter 415, the transmitter 515, the receiver 410, the receiver 510, or any combination thereof, or components thereof, as described herein.

[0170] Memory 730 may include random access memory (RAM) and read-only memory (ROM). Memory 730 may store computer-readable, computer-executable code 735 including instructions that, when executed by at least one processor 740, cause device 705 to perform the various functions described herein. Code 735 may be stored in a non-transitory computer-readable medium, such as system memory or another type of memory. In some cases, code 735 may not be directly executable by at least one processor 740, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, memory 730 may also contain, among other things, a basic I / O system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0171] The at least one processor 740 may include a hardware device (e.g., at least one general-purpose processor, DSP, CPU, GPU, microcontroller, ASIC, FPGA, programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the at least one processor 740 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the at least one processor 740 and coupled to the at least one processor. The at least one processor 740 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 730) to cause the device 705 to perform various functions (e.g., functions or tasks supporting low-power wake-up radio signaling in wireless communications). For example, the device 705 or a component of the device 705 may include at least one processor 740 and a memory 730 coupled to or coupled to the at least one processor 740, the at least one processor 740 and the memory 730 being configured to perform the various functions described herein.

[0172] According to examples disclosed herein, the communication manager 720 can support wireless communications. For example, the communication manager 720 can be configured as or otherwise support means for a first UE to transmit capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio. The communication manager 720 can be configured as or otherwise support means for receiving wake-up signaling from the wireless device based on the transmitted capability information. The communication manager 720 can be configured as or otherwise support means for transmitting wake-up signaling to a wake-up radio of the second UE.

[0173] Additionally or alternatively, the communication manager 720 may support wireless communications according to examples as disclosed herein. For example, the communication manager 720 may be configured as or otherwise support means for receiving control signaling including one or more parameters for a second UE associated with a wake-up radio to receive wake-up signaling from a first UE. The communication manager 720 may be configured as or otherwise support means for monitoring wake-up signaling based on one or more parameters. The communication manager 720 may be configured as or otherwise support means for receiving wake-up signaling from a wireless device via the first UE based on the monitoring.

[0174] By including or configuring a communication manager 720 according to examples as described herein, the device 705 can support techniques for reducing power consumption, extending battery life, reducing latency, and improving communication reliability.

[0175] In some examples, the communication manager 720 can be configured to use or otherwise cooperate with the transceiver 715, one or more antennas 725, or any combination thereof to perform various operations (e.g., receive, monitor, transmit). Although the communication manager 720 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 720 can be supported or performed by at least one processor 740, memory 730, code 735, or any combination thereof. For example, the code 735 can include instructions that can be executed by at least one processor 740 (e.g., directly, indirectly, after pre-processing or compilation, or without pre-processing or compilation) to cause the device 705 to perform various aspects of low-power wake-up radio signaling in wireless communications as described herein, or the at least one processor 740 and memory 730 can be otherwise configured to perform or support such operations.

[0176] Figure 8 A flow chart illustrating a method 800 for supporting low power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is provided. The operations of the method 800 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 800 may be implemented by a UE or a component thereof as described herein. Figures 1 to 7 The described functions may be performed by the UE 115. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0177] At 805, the method may include sending, by the first UE, capability information indicating that the first UE is capable of relaying wake-up signaling from the wireless device to a second UE associated with the wake-up radio. The operations of 805 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 805 may be performed as described in reference to Figure 6 The described capability message component 625 is executed.

[0178] At 810, the method may include receiving wake-up signaling from the wireless device based at least in part on the transmission capability information. The operations of 810 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 810 may be performed as described in reference to Figure 6 The described wake-up message component 630 is executed.

[0179] At 815, the method may include sending wake-up signaling to a wake-up radio of the second UE. The operations of 815 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 815 may be performed as described in reference to Figure 6 The described wake-up message component 630 is executed.

[0180] Figure 9 A flow chart illustrating a method 900 for supporting low power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is provided. The operations of the method 900 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 900 may be implemented by a UE or a component thereof as described herein. Figures 1 to 7 The described functions may be performed by the UE 115. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0181] At 905, the method may include sending, by the first UE, capability information indicating that the first UE is capable of relaying wake-up signaling from the wireless device to a second UE associated with the wake-up radio. The operations of 905 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 905 may be performed as described in reference to Figure 6 The described capability message component 625 is executed.

[0182] At 910, the method may include receiving one or more parameters for sending wake-up signaling to the second UE, the one or more parameters including a repetition factor, a transmit power, a periodicity, a waveform, a modulation and coding scheme, or any combination thereof, wherein sending the wake-up signaling is based at least in part on the one or more parameters. The operations of 910 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 910 may be performed as described in reference to Figure 6 The wake-up parameter component 640 described above is executed.

[0183] At 915, the method may include receiving wake-up signaling from the wireless device based at least in part on the transmission capability information. The operations of 915 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 915 may be performed as described in reference to Figure 6 The described wake-up message component 630 is executed.

[0184] At 920, the method may include sending wake-up signaling to a wake-up radio of the second UE. The operations of 920 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 920 may be performed as described in reference to Figure 6 The described wake-up message component 630 is executed.

[0185] Figure 10 A flow chart illustrating a method 1000 for supporting low power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is provided. The operations of the method 1000 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1000 may be implemented by a UE or a component thereof as described herein. Figures 1 to 7The described functions may be performed by the UE 115. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0186] At 1005, the method may include sending, by the first UE, capability information indicating that the first UE is capable of relaying wake-up signaling from the wireless device to a second UE associated with the wake-up radio. The operations of 1005 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1005 may be performed as described in reference to Figure 6 The described capability message component 625 is executed.

[0187] At 1010, the method may include receiving wake-up signaling from the wireless device based at least in part on the transmission capability information. The operations of 1010 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1010 may be performed as described in reference to Figure 6 The described wake-up message component 630 is executed.

[0188] At 1015, the method may include sending wake-up signaling to a wake-up radio of the second UE. The operations of 1015 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1015 may be performed as described in reference to Figure 6 The described wake-up message component 630 is executed.

[0189] At 1020, the method may include sending wake-up signaling to a wake-up radio of a second UE, the wake-up signaling indicating that the second UE is to wake up a primary radio of the second UE to wirelessly communicate via a first radio access technology in a set of multiple radio access technologies supported by the second UE, wherein the wake-up signaling includes a first waveform in a set of multiple waveforms corresponding to a corresponding radio access technology in the set of multiple radio access technologies, or the wake-up signaling is sent via a first resource set in a set of multiple resource sets corresponding to a corresponding radio access technology in the set of multiple radio access technologies. The operations of 1020 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1020 may be performed by reference to Figure 6 The described wake-up message component 630 is executed.

[0190] Figure 11 A flow chart illustrating a method 1100 for supporting low power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is provided. The operations of the method 1100 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1100 may be implemented by a UE or a component thereof as described herein. Figures 1 to 7The described functions may be performed by the UE 115. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0191] At 1105, the method may include receiving control signaling including one or more parameters for receiving wake-up signaling from a first UE by a second UE associated with a wake-up radio. The operations of 1105 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1105 may be performed as described in reference to Figure 6 The described capability message component 625 is executed.

[0192] At 1110, the method may include monitoring wake-up signaling according to one or more parameters. The operations of 1110 may be performed according to examples disclosed herein. In some examples, aspects of the operations of 1110 may be performed as described in reference to Figure 6 The monitoring component 635 is described to perform.

[0193] At 1115, the method may include receiving wake-up signaling from the wireless device via the first UE based at least in part on the monitoring. The operations of 1115 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1115 may be performed as described in reference to Figure 6 The monitoring component 635 is described to perform.

[0194] Figure 12 A flow chart illustrating a method 1200 for supporting low power wake-up radio signaling in wireless communications according to one or more aspects of the present disclosure is provided. The operations of the method 1200 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1200 may be implemented by a UE or a component thereof as described herein. Figures 1 to 7 The described functions may be performed by the UE 115. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0195] At 1205, the method may include receiving control signaling including one or more parameters for receiving wake-up signaling from a first UE by a second UE associated with a wake-up radio. The operations of 1205 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1205 may be performed as described in reference to Figure 6 The described capability message component 625 is executed.

[0196] At 1210, the method may include monitoring wake-up signaling according to one or more parameters. The operations of 1210 may be performed according to examples disclosed herein. In some examples, aspects of the operations of 1210 may be performed as described in reference to Figure 6 The monitoring component 635 is described to perform.

[0197] At 1215, the method may include receiving wake-up signaling from the wireless device via the first UE based at least in part on the monitoring. The operations of 1215 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1215 may be performed as described in reference to Figure 6 The monitoring component 635 is described to perform.

[0198] At 1220, the method may include receiving, using a wake-up radio of the second UE, wake-up signaling indicating that the second UE is to wake up a primary radio of the second UE to wirelessly communicate via a first radio access technology in a set of multiple radio access technologies supported by the second UE, wherein the wake-up signaling includes a first waveform in a set of multiple waveforms corresponding to a corresponding radio access technology in the set of multiple radio access technologies, or the wake-up signaling is sent via a first resource set in a set of multiple resource sets corresponding to a corresponding radio access technology in the set of multiple radio access technologies. The operations of 1220 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1220 may be performed by, as described with reference to Figure 6 The described wake-up message component 630 is executed.

[0199] The following provides an overview of various aspects of the disclosure:

[0200] Aspect 1: A method for wireless communication, the method comprising: sending capability information by a first UE, the capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio; receiving the wake-up signaling from the wireless device based at least in part on sending the capability information; and sending the wake-up signaling to the wake-up radio of the second UE.

[0201] Aspect 2: According to the method according to Aspect 1, the method also includes: receiving one or more parameters for sending the wake-up signaling to the second UE, the one or more parameters including a repetition factor, a transmission power, a periodicity, a waveform, a modulation and decoding scheme, or any combination thereof, wherein sending the wake-up signaling is at least partially based on the one or more parameters.

[0202] Aspect 3: According to the method of aspect 2, the method also includes: receiving a request to update the one or more parameters from the second UE based at least in part on the indication in the capability information that the first UE is capable of receiving wake-up radio signaling from the second UE.

[0203] Aspect 4: According to the method described in any one of Aspects 2 to 3, the method also includes: receiving an update of the one or more parameters from the wireless device at least in part based on an indication in the capability information that the first UE is unable to receive wake-up radio signaling from the second UE, wherein the wireless device includes a network entity.

[0204] Aspect 5: According to the method described in any one of Aspects 1 to 4, the method further includes: sending an indication of one or more wake-up message types that the first UE can send via the capability information, the one or more wake-up message types including a wake-up signal, a wake-up reference signal, a synchronization signal or any combination thereof, wherein sending the wake-up signaling includes sending one of the wake-up message types sent via the capability information.

[0205] Aspect 6: A method according to any one of Aspects 1 to 5, wherein sending the wake-up signaling includes: sending the wake-up signaling to the wake-up radio of the second UE, the wake-up signaling indicating that the second UE will wake up the primary radio of the second UE to perform wireless communication via a first radio access technology among multiple radio access technologies supported by the second UE, wherein the wake-up signaling includes a first waveform among multiple waveforms corresponding to a corresponding radio access technology among the multiple radio access technologies, or the wake-up signaling is sent via a first resource set among multiple resource sets corresponding to a corresponding radio access technology among the multiple radio access technologies.

[0206] Aspect 7: According to the method described in any one of Aspects 1 to 6, the method further includes: sending, via the capability information: an indication that the first UE is capable of supporting wake-up radio, or both wake-up radio and primary radio for a frequency resource set, and an indication of one or more candidate parameters for the wake-up signaling corresponding to the wake-up radio, the primary radio, or both, or any combination thereof.

[0207] Aspect 8: According to any one of the methods of Aspects 1 to 7, the method further includes: sending an indication of a threshold distance from the wireless device corresponding to the wake-up signaling to the second UE, wherein the wake-up signaling is received from the wireless device at least in part based on the position of the second UE satisfying the threshold distance.

[0208] Aspect 9: The method according to any one of aspects 1 to 8, wherein sending the capability information comprises: sending an initial registration message, a random access message, a radio resource control message, or any combination thereof to the wireless device, wherein the wireless device comprises a network entity.

[0209] Aspect 10: A method according to any one of Aspects 1 to 9, wherein sending the capability information includes: sending a sidelink control information message, a sidelink radio resource control message, or any combination thereof to the wireless device, wherein the wireless device includes a primary sidelink UE.

[0210] Aspect 11: The method according to any one of aspects 1 to 10, wherein sending the capability information is based at least in part on a power level or charging rate at the first UE satisfying a threshold.

[0211] Aspect 12: The method according to any one of aspects 1 to 11, further comprising: using a primary radio or a wake-up radio of the first UE to send an indication that the first UE supports discontinuous reception operation via the capability information.

[0212] Aspect 13: The method according to aspect 12 further includes: selecting a discontinuous reception cycle based at least in part on the indication that the first UE supports the discontinuous reception operation, wherein sending the wake-up signaling to the wake-up radio of the second UE is based at least in part on the discontinuous reception cycle.

[0213] Aspect 14: A method for wireless communication, the method comprising: receiving control signaling including one or more parameters, the one or more parameters being used for receiving wake-up signaling from a first UE by a second UE associated with a wake-up radio; monitoring the wake-up signaling based on the one or more parameters; and receiving the wake-up signaling from a wireless device via the first UE based at least in part on the monitoring.

[0214] Aspect 15: The method according to aspect 14, wherein the one or more parameters include repetition factor, transmit power, periodicity, waveform, modulation and decoding scheme, or any combination thereof, and receiving the wake-up signaling is at least partially based on the one or more parameters.

[0215] Aspect 16: The method according to aspect 15 further includes: sending a request for the one or more parameters to the wireless device or the first UE before entering the sleep mode, wherein receiving the one or more parameters is at least partially based on sending the request.

[0216] Aspect 17: A method according to Aspect 16, wherein sending the request for the one or more parameters includes: sending an indication of one or more candidate parameters including the one or more parameters based at least in part on the current location of the second UE, the power state of the second UE, the charging rate profile at the second UE, or any combination thereof.

[0217] Aspect 18: According to the method described in any one of Aspects 15 to 17, the method further includes: sending a request to update the one or more parameters to the wireless device or the first UE; receiving an update of the one or more parameters from the wireless device or the first UE based at least in part on sending the request; and receiving additional wake-up signaling from the first UE based on the update of the one or more parameters.

[0218] Aspect 19: A method according to any one of Aspects 14 to 18, wherein receiving the wake-up signaling includes: using the wake-up radio of the second UE to receive the wake-up signaling, the wake-up signaling indicating that the second UE will wake up the primary radio of the second UE to perform wireless communication via a first radio access technology among multiple radio access technologies supported by the second UE, wherein the wake-up signaling includes a first waveform among multiple waveforms corresponding to a corresponding radio access technology among the multiple radio access technologies, or the wake-up signaling is sent via a first resource set among multiple resource sets corresponding to a corresponding radio access technology among the multiple radio access technologies.

[0219] Aspect 20: The method of aspect 19, wherein the one or more parameters include an indication of the plurality of radio access technologies, the plurality of resource sets, the plurality of waveforms, or any combination thereof.

[0220] Aspect 21: According to any one of Aspects 14 to 20, the method further includes: receiving an indication of a set of candidate UEs including the first UE from the wireless device or the first UE, each candidate UE in the set of candidate UEs being capable of relaying wake-up signaling to the second UE, wherein the monitoring is at least partially based on the indication of the set of candidate UEs.

[0221] Aspect 22: According to the method described in any one of Aspects 14 to 21, the method further includes: sending capability information indicating that the second UE is capable of receiving wireless signaling for a frequency resource set via the wake-up radio, or both the wake-up radio and the primary radio, and the capability information also includes an indication of one or more candidate parameters for the wake-up signaling corresponding to the wake-up radio, the primary radio, or both, or any combination thereof.

[0222] Aspect 23: According to any one of Aspects 14 to 22, the method also includes: sending one or more reference signals to the wireless device before entering sleep mode, the wireless device includes a network entity, wherein the wake-up signaling received from the wireless device via the first UE is at least partially based on sending the one or more reference signals.

[0223] Aspect 24: According to any one of aspects 14 to 23, the method further includes: sending mobility information indicating the location of the second UE, the direction of the second UE, the speed of the second UE, an indication that the UE is leaving the coverage area, or any combination thereof to the wireless device, wherein receiving the wake-up signaling from the wireless device via the first UE is at least partially based on sending the mobility information.

[0224] Aspect 25: The method according to any one of aspects 14 to 24, wherein the wireless device comprises a network entity or a sidelink UE.

[0225] Aspect 26: The method according to any one of aspects 14 to 25, further comprising: using a primary radio or a wake-up radio of the second UE to transmit capability information including an indication that the second UE supports discontinuous reception operation.

[0226] Aspect 27: The method according to Aspect 26 further includes: selecting a discontinuous reception cycle based at least in part on the indication that the second UE supports the discontinuous reception operation, wherein the wake-up signaling received from the wireless device via the first UE is based at least in part on the discontinuous reception cycle.

[0227] Aspect 28: An apparatus for wireless communication, the apparatus comprising: at least one processor; a memory coupled to the at least one processor; and instructions stored in the memory and executable by the at least one processor to cause the apparatus to perform a method according to any one of Aspects 1 to 13.

[0228] Aspect 29: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to any one of aspects 1 to 13.

[0229] Aspect 30: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to any one of aspects 1 to 13.

[0230] Aspect 31: An apparatus for wireless communication, the apparatus comprising: at least one processor; a memory coupled to the at least one processor; and instructions stored in the memory and executable by the at least one processor to cause the apparatus to perform a method according to any one of Aspects 14 to 27.

[0231] Aspect 32: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method according to any one of aspects 14 to 27.

[0232] Aspect 33: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to any one of aspects 14 to 27.

[0233] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified and that other implementations are possible. Furthermore, aspects of two or more of these methods may be combined.

[0234] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for example purposes, and the terminology of LTE, LTE-A, LTE-A Pro, or NR may be used throughout much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDM, and other systems and radio technologies not explicitly mentioned herein, including future systems and radio technologies.

[0235] The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips referred to throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0236] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed using at least one general-purpose processor, DSP, ASIC, CPU, GPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0237] The functions described herein can be implemented using hardware, software executed by at least one processor, or any combination thereof. Software should be broadly interpreted to mean instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, processes, or functions, whether described in software, firmware, middleware, microcode, hardware description languages, or other terms. When implemented in software executed by at least one processor, the functions can be stored as one or more instructions or codes of a computer-readable medium, or sent using one or more instructions or codes of a computer-readable medium. Other examples and specific implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software executed by at least one processor, firmware, hard wiring, or any combination thereof. The features that implement the functions can also be physically located at different locations, including being distributed so that the parts that implement the functions are located at different physical locations.

[0238] Computer-readable media includes both non-transitory computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one location to another. Non-transitory storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, phase-change memory, compact disc (CD) ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code components in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer or at least one general-purpose or special-purpose processor. Furthermore, any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included within the definition of computer-readable media. As used herein, disk and disc include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs. Disks can reproduce data magnetically, and discs can reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0239] As used herein, including in the claims, "or" used in a list of items (e.g., a list of items followed by a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Moreover, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on." As used herein, when the term "and / or" is used in a list of two or more items, it means that any one of the listed items may be taken individually, or any combination of two or more of the listed items may be taken. For example, if a composition is described as comprising components A, B, and / or C, the composition can comprise A alone; B alone; C alone; A and B combined; A and C combined; B and C combined; or A, B, and C combined.

[0240] The terms "determining" or "identifying" encompass a variety of actions, and thus, "determining" or "identifying" may include calculating, computing, processing, deriving, investigating, searching (such as by searching in a table, database, or other data structure), or ascertaining. Furthermore, "determining" or "identifying" may include receiving (such as receiving information or signaling, e.g., receiving information or signaling for determining, receiving information or signaling for identifying) or accessing (such as accessing data in a memory or accessing information). Furthermore, "determining" or "identifying" may include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.

[0241] In the drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number to distinguish between similar components. If only the first reference number is used in the specification, the description applies to any of the similar components having the same first reference number, regardless of the second or subsequent reference numbers.

[0242] The description set forth herein in conjunction with the accompanying drawings describes example configurations and does not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration," rather than "preferred" or "having advantages over other examples." The detailed description includes specific details to provide an understanding of the described technology. However, these technologies may be practiced without these specific details. In some cases, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0243] The description herein is provided to enable one of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for wireless communication, the device comprising: at least one processor; and a memory coupled to the at least one processor, the memory storing instructions executable by the at least one processor to cause the apparatus to: sending, by a first user equipment (UE), capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio; receiving the wake-up signaling from the wireless device based at least in part on sending the capability information; as well as The wake-up signaling is sent to the wake-up radio of the second UE.

2. The apparatus of claim 1 , wherein the instructions are further executable by the at least one processor to cause the apparatus to: and receiving one or more parameters for sending the wake-up signaling to the second UE, the one or more parameters comprising a repetition factor, a transmit power, a periodicity, a waveform, a modulation and coding scheme, or any combination thereof, wherein sending the wake-up signaling is based at least in part on the one or more parameters.

3. The apparatus of claim 2, wherein the instructions are further executable by the at least one processor to cause the apparatus to: A request to update the one or more parameters is received from the second UE based at least in part on an indication in the capability information that the first UE is capable of receiving wake-up radio signaling from the second UE.

4. The apparatus of claim 2, wherein the instructions are further executable by the at least one processor to cause the apparatus to: An update of the one or more parameters is received from the wireless device based at least in part on an indication in the capability information that the first UE is unable to receive wake-up radio signaling from the second UE, wherein the wireless device comprises a network entity.

5. The apparatus of claim 1 , wherein the instructions are further executable by the at least one processor to cause the apparatus to: and sending, via the capability information, an indication of one or more wake-up message types that the first UE is capable of sending, the one or more wake-up message types comprising a wake-up signal, a wake-up reference signal, a synchronization signal, or any combination thereof, wherein sending the wake-up signaling comprises sending one of the wake-up message types sent via the capability information.

6. The apparatus of claim 1 , wherein the instructions for sending the wake-up signaling are further executable by the at least one processor to cause the apparatus to: The wake-up signaling is sent to a wake-up radio of the second UE, the wake-up signaling indicating that the second UE is to wake up a primary radio of the second UE for wireless communication via a first radio access technology among a plurality of radio access technologies supported by the second UE, wherein the wake-up signaling includes a first waveform among a plurality of waveforms corresponding to a corresponding radio access technology among the plurality of radio access technologies, or the wake-up signaling is sent via a first resource set among a plurality of resource sets corresponding to the corresponding radio access technology among the plurality of radio access technologies.

7. The apparatus of claim 1 , wherein the instructions are further executable by the at least one processor to cause the apparatus to: The capability information transmits: an indication that the first UE is capable of supporting a wake-up radio, or both a wake-up radio and a primary radio for a frequency resource set; and an indication of one or more candidate parameters for the wake-up signaling corresponding to the wake-up radio, the primary radio, or both, or any combination thereof.

8. The apparatus of claim 1 , wherein the instructions are further executable by the at least one processor to cause the apparatus to: An indication of a threshold distance from the wireless device corresponding to wake-up signaling is sent to the second UE, wherein receiving the wake-up signaling from the wireless device is based at least in part on a location of the second UE satisfying the threshold distance.

9. The apparatus of claim 1 , wherein the instructions for transmitting the capability information are further executable by the at least one processor to cause the apparatus to: An initial registration message, a random access message, a radio resource control message, or any combination thereof is sent to the wireless device, wherein the wireless device comprises a network entity.

10. The apparatus of claim 1 , wherein the instructions for transmitting the capability information are further executable by the at least one processor to cause the apparatus to: A sidelink control information message, a sidelink radio resource control message, or any combination thereof is sent to the wireless device, wherein the wireless device comprises a primary sidelink UE.

11. The apparatus of claim 1, wherein sending the capability information is based at least in part on a power level or charging rate at the first UE satisfying a threshold.

12. An apparatus for wireless communication, the apparatus comprising: at least one processor; and a memory coupled to the at least one processor, the memory storing instructions executable by the at least one processor to cause the apparatus to: receiving control signaling including one or more parameters for receiving wake-up signaling from a first user equipment (UE) associated with a wake-up radio; monitoring the wake-up signaling according to the one or more parameters; as well as The wake-up signaling is received from a wireless device via the first UE based at least in part on the monitoring.

13. The apparatus according to claim 12, wherein: The one or more parameters include a repetition factor, a transmit power, a periodicity, a waveform, a modulation and coding scheme, or any combination thereof; and Receiving the wake-up signaling is based at least in part on the one or more parameters.

14. The apparatus of claim 13, wherein the instructions are further executable by the at least one processor to cause the apparatus to: A request for the one or more parameters is sent to the wireless device or the first UE prior to entering sleep mode, wherein receiving the one or more parameters is based at least in part on sending the request.

15. The apparatus of claim 14, wherein sending the request for the one or more parameters is further executable by the at least one processor to cause the apparatus to: An indication of one or more candidate parameters including the one or more parameters is sent based at least in part on a current location of the second UE, a power state of the second UE, a charging rate profile at the second UE, or any combination thereof.

16. The apparatus of claim 13, wherein the instructions are further executable by the at least one processor to cause the apparatus to: sending a request to the wireless device or the first UE to update the one or more parameters; receiving an update to the one or more parameters from the wireless device or the first UE based at least in part on sending the request; as well as Additional wake-up signaling is received from the first UE based on the updating of the one or more parameters.

17. The apparatus of claim 12, wherein the instructions for receiving the wake-up signaling are further executable by the at least one processor to cause the apparatus to: and receiving, using the wake-up radio of the second UE, the wake-up signaling indicating that the second UE is to wake up a primary radio of the second UE for wireless communication via a first radio access technology among a plurality of radio access technologies supported by the second UE, wherein the wake-up signaling comprises a first waveform among a plurality of waveforms corresponding to a corresponding radio access technology among the plurality of radio access technologies or the wake-up signaling is sent via a first resource set among a plurality of resource sets corresponding to the corresponding radio access technology among the plurality of radio access technologies.

18. The apparatus of claim 17, wherein the one or more parameters comprise an indication of the plurality of radio access technologies, the plurality of resource sets, the plurality of waveforms, or any combination thereof.

19. The apparatus of claim 12, wherein the instructions are further executable by the at least one processor to cause the apparatus to: An indication of a set of candidate UEs including the first UE is received from the wireless device or the first UE, each candidate UE in the set of candidate UEs being capable of relaying wake-up signaling to the second UE, wherein the monitoring is based at least in part on the indication of the set of candidate UEs.

20. The apparatus of claim 12, wherein the instructions are further executable by the at least one processor to cause the apparatus to: Transmit capability information indicating that the second UE is capable of receiving wireless signaling via the wake-up radio, or both the wake-up radio and the primary radio, for a set of frequency resources, the capability information also including an indication of one or more candidate parameters for the wake-up signaling corresponding to the wake-up radio, the primary radio, or both, or any combination thereof.

21. The apparatus of claim 12, wherein the instructions are further executable by the at least one processor to cause the apparatus to: One or more reference signals are sent to the wireless device prior to entering sleep mode, the wireless device comprising a network entity, wherein receiving the wake-up signaling from the wireless device via the first UE is based at least in part on sending the one or more reference signals.

22. The apparatus of claim 12, wherein the instructions are further executable by the at least one processor to cause the apparatus to: and sending, to the wireless device, mobility information indicating a location of the second UE, a direction of the second UE, a speed of the second UE, an indication that the UE is leaving a coverage area, or any combination thereof, wherein receiving the wake-up signaling from the wireless device via the first UE is based at least in part on sending the mobility information.

23. The apparatus of claim 12, wherein the wireless device comprises a network entity or a sidelink UE.

24. A method for wireless communication, the method comprising: sending, by a first user equipment (UE), capability information indicating that the first UE is capable of relaying wake-up signaling from a wireless device to a second UE associated with a wake-up radio; receiving the wake-up signaling from the wireless device based at least in part on sending the capability information; as well as The wake-up signaling is sent to the wake-up radio of the second UE.

25. The method according to claim 24, further comprising: and receiving one or more parameters for sending the wake-up signaling to the second UE, the one or more parameters comprising a repetition factor, a transmit power, a periodicity, a waveform, a modulation and coding scheme, or any combination thereof, wherein sending the wake-up signaling is based at least in part on the one or more parameters.

26. The method according to claim 24, further comprising: and sending, via the capability information, an indication of one or more wake-up message types that the first UE is capable of sending, the one or more wake-up message types comprising a wake-up signal, a wake-up reference signal, a synchronization signal, or any combination thereof, wherein sending the wake-up signaling comprises sending one of the wake-up message types sent via the capability information.

27. The method of claim 24, wherein sending the wake-up signaling comprises: The wake-up signaling is sent to a wake-up radio of the second UE, the wake-up signaling indicating that the second UE is to wake up a primary radio of the second UE for wireless communication via a first radio access technology among a plurality of radio access technologies supported by the second UE, wherein the wake-up signaling includes a first waveform among a plurality of waveforms corresponding to a corresponding radio access technology among the plurality of radio access technologies, or the wake-up signaling is sent via a first resource set among a plurality of resource sets corresponding to the corresponding radio access technology among the plurality of radio access technologies.

28. The method of claim 24, further comprising: The capability information transmits: an indication that the first UE is capable of supporting a wake-up radio, or both a wake-up radio and a primary radio for a frequency resource set; and an indication of one or more candidate parameters for the wake-up signaling corresponding to the wake-up radio, the primary radio, or both, or any combination thereof.

29. A method for wireless communication, the method comprising: receiving control signaling including one or more parameters for receiving wake-up signaling from a first user equipment (UE) associated with a wake-up radio; monitoring the wake-up signaling according to the one or more parameters; as well as The wake-up signaling is received from a wireless device via the first UE based at least in part on the monitoring.

30. The method of claim 29, wherein receiving the wake-up signaling comprises: and receiving, using the wake-up radio of the second UE, the wake-up signaling indicating that the second UE is to wake up a primary radio of the second UE for wireless communication via a first radio access technology among a plurality of radio access technologies supported by the second UE, wherein the wake-up signaling comprises a first waveform among a plurality of waveforms corresponding to a corresponding radio access technology among the plurality of radio access technologies or the wake-up signaling is sent via a first resource set among a plurality of resource sets corresponding to the corresponding radio access technology among the plurality of radio access technologies.

Images