Quasi-co-location source identification for wireless communications
By selecting a QCL source for downlink transmissions based on low-power wake-up signals and synchronization signals, the system addresses power state transitions in wireless communication, enhancing reliability and reducing power consumption for improved user experience and resource efficiency.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- QUALCOMM INC
- Filing Date
- 2025-01-15
- Publication Date
- 2026-07-23
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Figure CN2025072419_23072026_PF_FP_ABST
Abstract
Description
QUASI-CO-LOCATION SOURCE IDENTIFICATION FOR WIRELESS COMMUNICATIONSTECHNICAL FIELD
[0001] The following relates to wireless communications, including quasi-co-location source identification for wireless communications.BACKGROUND
[0002] Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the 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) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, 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 communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE) .SUMMARY
[0003] The systems, methods, and devices of this disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein.
[0004] A method for wireless communications by a user equipment (UE) is described. The method may include receiving low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal, receiving, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state, and monitoring, while operating in the second power state, for the downlink transmission based on a first quasi-co-location source that is selected from the set of available quasi-co-location sources in accordance with the low-power wake-up configuration information.
[0005] A UE for wireless communications is described. The UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively be operable to execute the code to cause the UE to receive low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal, receive, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state, and monitor, while operating in the second power state, for the downlink transmission based on a first quasi-co-location source that is selected from the set of available quasi-co-location sources in accordance with the low-power wake-up configuration information.
[0006] Another UE for wireless communications is described. The UE may include means for receiving low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal, means for receiving, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state, and means for monitoring, while operating in the second power state, for the downlink transmission based on a first quasi-co-location source that is selected from the set of available quasi-co-location sources in accordance with the low-power wake-up configuration information.
[0007] A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors (e.g., directly, indirectly, after pre-processing, without pre-processing) to receive low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal, receive, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state, and monitor, while operating in the second power state, for the downlink transmission based on a first quasi-co-location source that is selected from the set of available quasi-co-location sources in accordance with the low-power wake-up configuration information.
[0008] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the first quasi-co-location source may be selected from a latest one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal, that may be received at the UE.
[0009] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the low-power wake-up configuration information further indicates a type of quasi-co-location associated with each quasi-co-location source of the set of available quasi-co-location sources.
[0010] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, receiving the low-power wake-up configuration information may include operations, features, means, or instructions for receiving radio resource control signaling, a medium access control (MAC) control element, or any combination thereof, that provides a transmission configuration indicator (TCI) state associated with the downlink transmission and that indicates which of the low-power synchronization signal, the low-power wake-up signal, the synchronization signal block, or the channel state information reference signal, is available for selection as the first quasi-co-location source.
[0011] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the first quasi-co-location source may be specified to be selected from the quasi-co-location source of one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal and the low-power wake-up configuration information indicates that a most recent one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal that is received at the UE is to be selected as the first quasi-co-location source.
[0012] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the UE selects the first quasi-co-location source from the set of available quasi-co-location sources based on which quasi-co-location source of the set of available quasi-co-location sources is most likely to provide a successful reception of the downlink transmission.
[0013] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the low-power wake-up configuration information indicates a default quasi-co-location source for the downlink transmission, and the first quasi-co-location source may be set to the default quasi-co-location source or a different quasi-co-location source that is indicated to the UE subsequent to the low-power wake-up configuration information, and where the different quasi-co-location source may be indicated in radio resource control signaling, in a medium access control (MAC) control element, or downlink control information.
[0014] Some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to a network entity, an indication of a preferred quasi-co-location source for the downlink transmission that indicates one of the set of available quasi-co-location sources.
[0015] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the downlink transmission may be a dynamically scheduled downlink transmission, or may be a downlink shared channel transmission in accordance with a semi-persistent scheduling configuration.
[0016] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the low-power synchronization signal and the low-power wake-up signal use a unified transmission configuration indicator (TCI) state with one of the synchronization signal block or the channel state information reference signal and the low-power synchronization signal and the low-power wake-up signal use a TCI state that may be independent of a TCI state of the synchronization signal block and the channel state information reference signal.
[0017] A method for wireless communications by a network entity is described. The method may include outputting, to a UE, low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, where the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal, outputting the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption at the UE than the first power state, and outputting for the downlink transmission using a first quasi-co-location source that is selected in accordance with the low-power wake-up configuration information.
[0018] A network entity for wireless communications is described. The network entity may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively be operable to execute the code to cause the network entity to output, to a UE, low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, where the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal, output the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption at the UE than the first power state, and output for the downlink transmission using a first quasi-co-location source that is selected in accordance with the low-power wake-up configuration information.
[0019] Another network entity for wireless communications is described. The network entity may include means for outputting, to a UE, low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, where the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal, means for outputting the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption at the UE than the first power state, and means for outputting for the downlink transmission using a first quasi-co-location source that is selected in accordance with the low-power wake-up configuration information.
[0020] A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors (e.g., directly, indirectly, after pre-processing, without pre-processing) to output, to a UE, low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, where the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal, output the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption at the UE than the first power state, and output for the downlink transmission using a first quasi-co-location source that is selected in accordance with the low-power wake-up configuration information.
[0021] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the first quasi-co-location source may be selected from a latest one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal, that is transmitted to the UE.
[0022] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the low-power wake-up configuration information further indicates a type of quasi-co-location associated with each quasi-co-location source of the set of available quasi-co-location sources.
[0023] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, outputting the low-power wake-up configuration information may include operations, features, means, or instructions for outputting radio resource control signaling, a medium access control (MAC) control element, or any combination thereof, that provides a transmission configuration indicator (TCI) state associated with the downlink transmission and that indicates which of the low-power synchronization signal, the low-power wake-up signal, the synchronization signal block, or the channel state information reference signal, is available for selection as the first quasi-co-location source.
[0024] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the first quasi-co-location source may be specified to be selected from the quasi-co-location source of one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal and the low-power wake-up configuration information indicates that a most recent one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal that is received at the UE is to be selected as the first quasi-co-location source.
[0025] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the low-power wake-up configuration information indicates a default quasi-co-location source for the downlink transmission, and the first quasi-co-location source may be set to the default quasi-co-location source or a different quasi-co-location source that may be indicated to the UE subsequent to the low-power wake-up configuration information, and where the different quasi-co-location source may be indicated in radio resource control signaling, in a medium access control (MAC) control element, or downlink control information.
[0026] Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the UE, an indication of a preferred quasi-co-location source for the downlink transmission that indicates one of the set of available quasi-co-location sources, and where the first quasi-co-location source may be selected in accordance with the indication of the preferred quasi-co-location source.
[0027] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the downlink transmission may be a dynamically scheduled downlink transmission, or may be a downlink shared channel transmission in accordance with a semi-persistent scheduling configuration.
[0028] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the low-power synchronization signal and the low-power wake-up signal use a unified transmission configuration indicator (TCI) state with one of the synchronization signal block or the channel state information reference signal and the low-power synchronization signal and the low-power wake-up signal use a TCI state that may be independent of a TCI state of the synchronization signal block and the channel state information reference signal.
[0029] Details of one or more implementations of the subject matter described in this disclosure are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages will become apparent from the description, the drawings, and the claims. Note that the relative dimensions of the following figures may not be drawn to scale.BRIEF DESCRIPTION OF THE DRAWINGS
[0030] FIG. 1 shows an example of a wireless communications system that supports quasi-co-location (QCL) source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0031] FIG. 2 shows an example of a wireless communications system that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0032] FIG. 3 shows an example of QCL sources for downlink communications that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0033] FIG. 4 shows an example of QCL sources for periodic downlink communications that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0034] FIG. 5 shows an example of a process flow that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0035] FIGs. 6 and 7 show block diagrams of devices that support QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0036] FIG. 8 shows a block diagram of a communications manager that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0037] FIG. 9 shows a diagram of a system including a device that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0038] FIGs. 10 and 11 show block diagrams of devices that support QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0039] FIG. 12 shows a block diagram of a communications manager that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0040] FIG. 13 shows a diagram of a system including a device that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.
[0041] FIGs. 14 through 18 show flowcharts illustrating methods that support QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure.DETAILED DESCRIPTION
[0042] Wireless networks may adopt various techniques and technologies to conserve power. One such example power saving technique may include use of a low-power wakeup radio (LP-WUR) at a user equipment (UE) that may be used in lieu of a main radio (MR) when the UE is in a lower power state, such as a sleep state. For example, the LP-WUR may be used to monitor for low-power wakeup signal (LP-WUS) transmissions, low-power synchronization signal (LP-SS) transmissions, or both. A LP-SS transmission may be transmitted periodically by a network entity and provide information for synchronization or timing of LP-SS and LP-WUS transmissions. A LP-WUS transmission may carry or otherwise convey an indication of whether the UE needs to transition to another state, such as a higher power state or an awake state, and power up the MR to perform wireless communications with a network. A LP-WUR may be a low-complexity and low power radio that can detect a LP-WUS and then turn on other components of the UE (e.g., a MR and associated components) for subsequent communications.
[0043] In some cases, a transmission configuration indicator (TCI) state may be provided to a UE that includes a quasi-co-location (QCL) relationship between a LP-WUS or LP-SS, a synchronization signal block (SSB) , and a sequential PDCCH, physical downlink shared channel (PDSCH) , or channel state information reference signal (CSI-RS) , where each TCI state includes up to two combinations of the a QCL type (e.g., QCL type A, B, C, or D, as defined in 5G communication standards) and a QCL source. In some cases, a network entity may configure a set of TCI states for the LP-WUS, and layer 1 (L1) or layer 2 (L2) signaling may select a TCI state among the set based on an indicated TCI state ID. In some examples, the L1 / L2 signaling may be the activation signaling for LP-WUS monitoring. Further, in some wireless communications systems, for L1 based TCI state indication in downlink control information (DCI) , a UE may determine a default TCI state for the PDSCH or CSI-RS scheduled by the DCI when spatial QCL is configured (e.g., QCL type D) and an offset between the DCI and PDSCH or CSI-RS is less than the beam switch timing threshold. Similarly, it may be beneficial for LP-WUS or LP-SS detection if the corresponding TCI state is provided to UE.
[0044] In some cases, when a UE is in connected mode, the MR in the UE may go into sleep state for power saving, and a serving network entity may transmit a LP-WUS to the UE to wake up the MR to receive following PDCCH or PDSCH (which may be referred to generally as PDxCH) . After the MR transitions into a sleep state, it may not monitor SSB, but the LP-WUR may detect a LP-WUS or LP-SS. In such cases, a QCL provided from a SSB may not be as accurate as that from the LP-WUS or LP-SS. For example, it may be more accurate to determine a QCL source based on a latest received signal for a PDxCH transmission subsequent to waking up the MR.
[0045] In accordance with various aspects discussed herein, techniques are provided to determine or configure a QCL source of a PDxCH that provide for enhanced reliability of detection of the PDxCH signals with the configured or indicated TCI state. In some aspects, a PDxCH subsequent to a LP-WUS may be QCLed with a latest received LP-WUS, LP-SS, SSB, or CSI-RS. In some aspects, a UE may be configured such that PDxCH transmissions are QCLed with one of a LP-WUS, a SSB, a LP-SS, a CSI-RS, or a latest one of {LP-SS, LP-WUS, SSB, or CSI-RS} . In some aspects, the specific QCL type (e.g., QCL type A, B, C, or D) may be indicated together with a configured option of the QCL source in configuration information provided by a network entity. In such aspects, the multiple options for QCL source selection may provide for more accurate QCL information compared with PDxCH signals that may have a QCL relationship only with SSB or CSI-RS. In some aspects, the network entity may indicate the specific QCL options in a TCI state indication to UEs provided in radio resource control (RRC) signaling, in a medium access control (MAC) control element (CE) , or any combination thereof. In some aspects, the options for the QCL source of a PDxCH may be defined in a specification, and a UE may be configured to select a QCL source from the defined options based on an evaluation at the UE of which would be likely to provide good reliability.
[0046] In some other aspects, a network entity may configure a UE with a default option for a QCL source for PDxCH (e.g., via RRC, MAC-CE, or DCI) , and the default option may be used in the event that the UE is not explicitly indicated to use a different QCL source. Additionally, or alternatively, a UE may transmit an indication to a network entity of a preferred QCL source (e.g., in uplink control information (UCI) or a MAC-CE) , and the network entity may update the QCL source for PDxCH transmissions in accordance with the indication from the UE. Additionally, or alternatively, a QCL source for a periodic transmission (e.g., downlink PDSCH transmissions transmitted in accordance with a semi-persistent scheduling (SPS) configuration) may be selected such that the LP-WUS is the QCL source for the upcoming PDSCH, and will remain as the QCL source until a next LP-WUS or LP-SS that updates the QCL source for one or more subsequent PDSCH transmissions. In other aspects, for SPS PDSCH transmissions, the QCL source may change at some point during configured PDSCH occasions, and the UE may select the associated QCL source based on a most recently received LP-WUS or LP-SS. Additionally, or alternatively, for the QCL of a LP-WUS or LP-SS in connected mode, such signals may use a unified TCI state with a SSB or CSI-RS, or may use their own TCI state (e.g., the specific TCI state for LP-WUS or LP-SS may be indicated by the network entity) .
[0047] Particular aspects of the subject matter described herein may be implemented to realize one or more potential advantages. The described techniques related to selection of a QCL source for one or more downlink communications in accordance with low-power WUR procedures may provide for enhanced reliability of downlink communications associated with a LP-WUS or LP-SS, reduced power consumption through reduced usage of a MR, reduced latency, improved user experience, more efficient utilization of communication resources, and longer battery life. For example, the UE may reduce power consumption by monitoring for a LP-WUS using a LP-WUR rather than having a higher power consumption MR enabled, and enhance reliability of downlink communications through selection of a QCL source that has a higher likelihood of providing reliable communications.
[0048] Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to timing diagrams for QCL sources and associated PDxCH transmissions, a process flow, apparatus diagrams, system diagrams, and flowcharts that relate to QCL source identification for wireless communications.
[0049] FIG. 1 shows an example of a wireless communications system 100 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The wireless communications system 100 may include one or more devices, such as one or more network devices (e.g., network entities 105) , one or more UEs 115, and a core network 130. In some examples, the wireless communications 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 in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.
[0050] The network entities 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may include devices in different forms or having different capabilities. In various examples, a network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature. In some examples, network entities 105 and UEs 115 may wirelessly communicate via communication link (s) 125 (e.g., a radio frequency (RF) access link) . For example, a network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UEs 115 and the network entity 105 may establish the communication link (s) 125. The coverage area 110 may be an example of a geographic area over which a network entity 105 and a UE 115 may support the communication of signals according to one or more radio access technologies (RATs) .
[0051] The UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communications with various types of devices in the wireless communications system 100 (e.g., other wireless communication devices, including UEs 115 or network entities 105) , as shown in FIG. 1.
[0052] As described herein, a node of the wireless communications system 100, which may be referred to as a network node, or a 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, a node may be a UE 115. As another example, a node may be a 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 a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In yet other aspects of this example, the first, second, and third nodes may be different relative to these examples. Similarly, reference to a UE 115, network entity 105, apparatus, device, computing system, or the like may include disclosure of the UE 115, network entity 105, apparatus, device, computing system, or the like being a node. For example, disclosure that a UE 115 is configured to receive information from a network entity 105 also discloses that a first node is configured to receive information from a second node.
[0053] In some examples, network entities 105 may communicate with a core network 130, or with one another, or both. For example, network entities 105 may communicate with the core network 130 via backhaul communication link (s) 120 (e.g., in accordance with an S1, N2, N3, or other interface protocol) . In some examples, network entities 105 may communicate with one another via backhaul communication link (s) 120 (e.g., in accordance with an X2, Xn, or other interface protocol) either directly (e.g., directly between network entities 105) or indirectly (e.g., via the core network 130) . In some examples, network entities 105 may communicate with one another via a midhaul communication link 162 (e.g., in accordance with a midhaul interface protocol) or a fronthaul communication link 168 (e.g., in accordance with a fronthaul interface protocol) , or any combination thereof. The backhaul communication link (s) 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., an electrical link, an optical fiber link) or one or more wireless links (e.g., a radio link, a wireless optical link) , among other examples or various combinations thereof. A UE 115 may communicate with the core network 130 via a communication link 155.
[0054] One or more of the network entities 105 or network equipment 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 NodeB, an eNodeB (eNB) , a next-generation NodeB or giga-NodeB (either of which may be referred to as a gNB) , a 5G NB, a next-generation eNB (ng-eNB) , a Home NodeB, a Home eNodeB, or other suitable terminology) . In some examples, a network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within one network entity (e.g., a network entity 105 or a single RAN node, such as a base station 140) .
[0055] In some examples, a network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) , which may be configured to utilize a protocol stack that is physically or logically distributed among multiple network entities (e.g., network entities 105) , such as an integrated access and 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, a network entity 105 may include one or more of a central unit (CU) , such as a CU 160, a distributed unit (DU) , such as a DU 165, a radio unit (RU) , such as an RU 170, a RAN Intelligent Controller (RIC) , such as an 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) system, such as an SMO system 180, or any combination thereof. An RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 105 may be located in distributed locations (e.g., separate physical locations) . In some examples, one or more of the network entities 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
[0056] The split of functionality between a CU 160, a DU 165, and an RU 170 is flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, or any combinations thereof) are performed at a CU 160, a DU 165, or an RU 170. For example, a functional split of a protocol stack may be employed between a CU 160 and a DU 165 such that the CU 160 may support one or more layers of the protocol stack and the DU 165 may support one or more different layers of the protocol stack. In some examples, the CU 160 may host upper 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 (e.g., one or more CUs) may be connected to a DU 165 (e.g., one or more DUs) or an RU 170 (e.g., one or more RUs) , or some combination thereof, and the DUs 165, RUs 170, or both 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 a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or multiple different cells (e.g., via one or multiple different RUs, such as an RU 170) . In some cases, a functional split between a CU 160 and a DU 165 or between a DU 165 and an RU 170 may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU 160, a DU 165, or an RU 170, while other functions of the protocol layer are performed by a different one of the CU 160, the DU 165, or the RU 170) . A CU 160 may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU 160 may be connected to a DU 165 via a midhaul communication link 162 (e.g., F1, F1-c, F1-u) , and a DU 165 may be connected to an RU 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface) . In some examples, a midhaul communication link 162 or a fronthaul communication link 168 may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities (e.g., one or more of the network entities 105) that are in communication via such communication links.
[0057] In some wireless communications systems (e.g., the wireless communications system 100) , infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network 130) . In some cases, in an IAB network, one or more of the network entities 105 (e.g., network entities 105 or IAB node (s) 104) may be partially controlled by each other. The IAB node (s) 104 may be referred to as a donor entity or an IAB donor. A DU 165 or an RU 170 may be partially controlled by a CU 160 associated with a network entity 105 or base station 140 (such as a donor network entity or a donor base station) . The one or more donor entities (e.g., IAB donors) may be in communication with one or more additional devices (e.g., IAB node (s) 104) via supported access and backhaul links (e.g., backhaul communication link (s) 120) . IAB node (s) 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by one or more DUs (e.g., DUs 165) of a coupled IAB donor. An IAB-MT may be equipped with an independent set of antennas for relay of communications with UEs 115 or may share the same antennas (e.g., of an RU 170) of IAB node (s) 104 used for access via the DU 165 of the IAB node (s) 104 (e.g., referred to as virtual IAB-MT (vIAB-MT) ) . In some examples, the IAB node (s) 104 may include one or more DUs (e.g., DUs 165) that support communication links with additional entities (e.g., IAB node (s) 104, UEs 115) within the relay chain or configuration of the access network (e.g., downstream) . In such cases, one or more components of the disaggregated RAN architecture (e.g., the IAB node (s) 104 or components of the IAB node (s) 104) may be configured to operate according to the techniques described herein.
[0058] In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support QCL source identification for 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., components such as an IAB node, a DU 165, a CU 160, an RU 170, an RIC 175, an SMO system 180) .
[0059] A 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 the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A 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 multimedia / entertainment device (e.g., a radio, a MP3 player, or a video device) , a camera, a gaming device, a navigation / positioning device (e.g., GNSS (global navigation satellite system) devices based on, for example, GPS (global positioning system) , Beidou, GLONASS, or Galileo, or a terrestrial-based device) , a tablet computer, a laptop computer, a netbook, a smartbook, a personal computer, a smart device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, virtual reality goggles, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet) ) , a drone, a robot / robotic device, a vehicle, a vehicular device, a meter (e.g., parking meter, electric meter, gas meter, water meter) , a monitor, a gas pump, an appliance (e.g., kitchen appliance, washing machine, dryer) , a location tag, a medical / healthcare device, an implant, a sensor / actuator, a display, or any other suitable device configured to communicate via a wireless or wired medium. In some examples, a UE 115 may include or 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 communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, vehicles, or meters, among other examples.
[0060] The UEs 115 described herein may be able to communicate with various types of devices, such as UEs 115 that may sometimes operate as relays, as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
[0061] The UEs 115 and the network entities 105 may wirelessly communicate with one another via the communication link (s) 125 (e.g., one or more access links) using resources associated with one or more carriers. The term “carrier” may refer to a set of RF spectrum resources having a defined PHY layer structure for supporting the communication link (s) 125. For example, a carrier used for the communication link (s) 125 may include a portion of an RF spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more PHY layer channels for a given RAT (e.g., LTE, LTE-A, LTE-A Pro, NR) . Each PHY layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. Communication between a network entity 105 and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity 105. For example, the terms “transmitting, ” “receiving, ” or “communicating, ” when referring to a network entity 105, may refer to any portion of a network entity 105 (e.g., a base station 140, a CU 160, a DU 165, a RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities, such as one or more of the network entities 105) .
[0062] Signal waveforms transmitted via a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) . In a system employing MCM techniques, a resource element may refer to resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The quantity of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) , such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication. A wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam) , and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE 115.
[0063] The time intervals for the network entities 105 or the UEs 115 may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of Ts=1 / (Δfmax·Nf) seconds, for which Δfmax may represent a supported subcarrier spacing, and Nf may represent a supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having 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) .
[0064] Each frame may include multiple consecutively-numbered subframes or slots, and each subframe or 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 quantity of slots. Alternatively, each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing. Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . In some wireless communications systems, such as the wireless communications system 100, a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., Nf) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
[0065] A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) . In some examples, the TTI duration (e.g., a quantity of symbol periods in a TTI) may be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
[0066] Physical channels may be multiplexed for communication using a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, 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 or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115. For example, one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to UEs 115 (e.g., one or more UEs) or may include UE-specific search space sets for sending control information to a UE 115 (e.g., a specific UE) .
[0067] In some examples, a network entity 105 (e.g., a base station 140, an RU 170) may be movable and therefore provide communication coverage for a moving coverage area, such as the coverage area 110. In some examples, coverage areas 110 (e.g., different coverage areas) associated with different technologies may overlap, but the coverage areas 110 (e.g., different coverage areas) may be supported by the same network entity (e.g., a network entity 105) . In some other examples, overlapping coverage areas, such as a coverage area 110, associated with different technologies may be supported by different network entities (e.g., the network entities 105) . The wireless communications system 100 may include, for example, a heterogeneous network in which different types of the network entities 105 support communications for coverage areas 110 (e.g., different coverage areas) using the same or different RATs.
[0068] The wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) . The UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions 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 may be used interchangeably herein.
[0069] In some examples, a UE 115 may be configured to support communicating directly with other UEs (e.g., one or more of the UEs 115) via a device-to-device (D2D) communication link, such as a D2D communication link 135 (e.g., in accordance with a peer-to-peer (P2P) , D2D, or sidelink protocol) . In some examples, one or more UEs 115 of a group that are performing D2D communications may be within the coverage area 110 of a network entity 105 (e.g., a base station 140, an RU 170) , which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity 105. In some examples, one or more UEs 115 of such a group may be outside the coverage area 110 of a network entity 105 or may be otherwise unable to or not configured to receive transmissions from a network entity 105. In some examples, groups of the UEs 115 communicating via D2D communications may support a one-to-many (1: M) system in which each UE 115 transmits to one or more of the UEs 115 in the group. In some examples, a network entity 105 may facilitate the scheduling of resources for D2D communications. In some other examples, D2D communications may be carried out between the UEs 115 without an involvement of a network entity 105.
[0070] 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 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the network entities 105 (e.g., base stations 140) associated with the core network 130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services 150 for one or more network operators. The IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
[0071] The wireless communications system 100 may operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) . Generally, the region from 300 MHz to 3 GHz is known 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 may be blocked or redirected by buildings and environmental features, which may be referred to as clusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than one hundred kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
[0072] The wireless communications system 100 may utilize both licensed and unlicensed RF spectrum bands. For example, the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) RAT, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. While operating using unlicensed RF spectrum bands, devices such as the network entities 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance. In some examples, operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA) . Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
[0073] A network entity 105 (e.g., a base station 140, an RU 170) or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a network entity 105 or a 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 at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a network entity 105 may be located at diverse geographic locations. A network entity 105 may include an antenna array with a set of rows and columns of antenna ports that the network entity 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally, or alternatively, an antenna panel may support RF beamforming for a signal transmitted via an antenna port.
[0074] Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating along particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
[0075] The wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or PDCP layer may be IP-based. An RLC layer may perform packet segmentation and reassembly to communicate via logical channels. A MAC layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer also may implement error detection techniques, error correction techniques, or both to support retransmissions to improve link efficiency. In the control plane, an RRC layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a network entity 105 or a core network 130 supporting radio bearers for user plane data. A PHY layer may map transport channels to physical channels.
[0076] In some aspects a UE 115 may implement low power techniques that use a WUR to detect one or more LP-WUSs and turn on a higher power main radio to monitor for a subsequent PDxCH transmission. In some aspects, a PDxCH subsequent to a LP-WUS may be QCLed with a latest received LP-WUS, LP-SS, SSB, or CSI-RS. In some aspects, a UE 115 may be configured such that PDxCH transmissions are QCLed with one of a LP-WUS, a SSB, a LP-SS, a CSI-RS, or a latest one of {LP-SS, LP-WUS, SSB, or CSI-RS} . In such aspects, the multiple options for QCL source selection may provide for more accurate QCL information compared with PDxCH signals that may have a QCL relationship only with SSB or CSI-RS.
[0077] FIG. 2 shows an example of a wireless communications system 200 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. In some examples, the wireless communications system 200 may implement aspects of the wireless communications system 100. For example, the wireless communications system 200 includes a UE 115-a, and a network entity 105-a, which may be examples of the corresponding devices described with reference to FIG. 1. Although aspects of the present disclosure are described with reference to UEs 115 and network entities 105, it is understood that the described techniques may be performed by a wireless device different from a UE 115 and a network entity 105. As described herein, operations performed by a UE 115-a and the network entity 105-a may be respectively performed by a UE 115, a network entity 105, or another wireless device, and the examples shown should not be construed as limiting.
[0078] In some examples, the network entity 105-a provide configuration information 205 to the UE 115-a that indicates a low power configuration for the UE 115-a, such as a configuration in which the UE 115-a may power down one or more components (such as a MR) and monitor for a LP-WUS 210 using a low-power radio. Upon detection of a LP-WUS 210, the UE 115-a may monitor for a PDxCH transmission (e.g., a PDCCH or a PDSCH transmission) . In some aspects, the UE 115-a may include circuitry 225 that includes a LP-WUR 235 and a MR 245, where the LP-WUR 235 may monitor for the LP-WUS 210 via antenna 230, and output a wake-up signal 240 to the MR 245 that wakes-up the MR 245 to monitor for PDxCH 220. The LP-WUS 210 may provide a signaling design that allows for a relatively simple receiver architecture, and may be associated with a basic modulation scheme, such as on-off keying (OOK) . Thus, in this example, the UE 115-a may include at least two radios: the MR 245 and the LP-WUR 235 (e.g., a radio that provides for envelope detection of an OOK WUS) . The LP-WUR 235 may include relatively simplified receiver circuitry that may be used to monitor for and detect LP-WUS 210. Since the LP-WUR 235 may lack one or more other receiving capabilities and consume less power, the UE 115-a may save power by operating in a relatively low power state (e.g., a first power state) using the LP-WUR 235 without operating more power-intensive receive circuitry including the MR 245.
[0079] In some aspects, the network entity 105-a, in addition to LP-WUS 210 transmissions, may transmit a low-power synchronization signal (LP-SS) 215. In some cases, frequency drift of the LP-WUR 235 clock may leads to timing drift, and LP-SS 215 may be transmitted to assist the LP-WUR 235 timing correction. In some aspects, LP-SS 215 transmissions may be periodic or aperiodic, where a periodic LP-SS 215 may be an always-on signal that is periodically transmitted and an aperiodic LP-SS 215 (also known as a preamble) may be transmitted as part of the LP-WUS 210.
[0080] As discussed herein, in some aspects, techniques are provided to determine or configure a QCL source of a PDxCH 220 that provide for enhanced reliability of detection of the PDxCH 220 signals with a configured or indicated TCI state. In some aspects, a PDxCH 220 subsequent to a LP-WUS 210 may be QCLed with a latest received LP-WUS 210, LP-SS 215, SSB, or CSI-RS. In some aspects, the UE 115-a may be configured such that PDxCH 220 transmissions are QCLed with one of a LP-WUS 210, SSB, LP-SS 215, CSI-RS, or a latest one of {LP-SS 215, LP-WUS 210, SSB, or CSI-RS} . In some aspects, a specific QCL type (e.g., QCL type A, B, C, or D) may be indicated together with a configured option of the QCL source in the configuration information 205 provided by the network entity 105-a. In such aspects, the multiple options for QCL source selection may provide for more accurate QCL information compared with PDxCH 220 signals that may have a QCL relationship only with SSB or CSI-RS. In some aspects, the network entity 105-a may indicate the specific QCL options in a TCI state indication to the UE 115-a provided in RRC signaling, in a MAC-CE, or any combination thereof. In some aspects, the options for the QCL source of the PDxCH 220 may be defined in a specification (e.g., in a specification associated with 5G radio access technology) , and the UE 115-a may be configured to select a QCL source from the defined options based on an evaluation at the UE 115-a of which would be likely to provide good reliability. In some aspects, the UE 115-a may transmit capability information 250 that indicates that the UE 115-a is capable of operating in accordance with LP-WUr techniques and can select a QCL source for downlink transmissions in accordance with the various techniques as discussed herein.
[0081] In some other aspects, a network entity 105-a may configure the UE 115-a with a default option for a QCL source for PDxCH 220 (e.g., via RRC, MAC-CE, or DCI) , and the default option may be used in the event that the UE 115-a is not explicitly indicated to use a different QCL source. Additionally, or alternatively, the UE 115-a may transmit an indication 255 to the network entity 105-a of a preferred QCL source (e.g., in uplink control information (UCI) or a MAC-CE) , and the network entity 105-a may update the QCL source for PDxCH 220 transmissions in accordance with the indication from the UE 115-a.
[0082] Additionally, or alternatively, a QCL source for a periodic transmission (e.g., downlink PDSCH transmissions transmitted in accordance with a SPS configuration) may be selected such that the LP-WUS 210 is the QCL source for the upcoming PDSCH, and will remain as the QCL source until a next LP-WUS 210 or LP-SS 215 that updates the QCL source for one or more subsequent PDSCH transmissions. In other aspects, for SPS PDSCH transmissions, the QCL source may change at some point during configured PDSCH occasions, and the UE 115-a may select the associated QCL source based on a most recently received LP-WUS 210 or LP-SS 215. Additionally, or alternatively, for the QCL of a LP-WUS 210 or LP-SS 215 in connected mode, such signals may use a unified TCI state with a SSB or CSI-RS, or may use their own TCI state (e.g., the specific TCI state for LP-WUS 210 or LP-SS 215 may be indicated by the network entity 105-a) .
[0083] FIG. 3 shows an example of QCL sources for downlink communications 300 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The QCL sources for downlink communications 300 may implement or be implemented by one or more aspects of the wireless communications system 100 and the wireless communications system 200 described with reference to FIGs. 1 and 2, respectively. For example, the QCL sources for downlink communications 300 may be implemented by a network entity 105 and a UE 115 as described with reference to FIGs. 1 and 2 to support reduced power consumption through implementation of a LP-WUS.
[0084] In this example, an initial QCL source configuration 305 may be provided to a UE. As discussed herein the initial QCL source configuration 305 may be provided via RRC signaling, one or more MAC-CEs, DCI, or any combination thereof. In some aspects, the QCL source configuration 305 may be provided in response to a capability indication from a UE. The QCL source configuration 305 may indicate, for example, that the UE is to select a QCL source for a downlink transmission (e.g., a PDSCH or PDCCH transmission) as one of a LP-WUS, SSB, LP-SS, CSI-RS, or a latest one of {LP-SS, LP-WUS, SSB, or CSI-RS} . In some aspects, the UE may receive an SSB 310, one or more of a LP-WUS or LP-SS 315, and a PDxCH 320, and a first QCL source 325 associated with the PDxCH 320 may be selected based on the initial QCL source configuration 305. In the example of FIG. 3, the UE may transmit a request for a QCL source 330, such as based on one or more measurements associated with the SSB 310, LP-WUS or LP-SS 315. The request for the QCL source 330 may be transmitted, for example, in UCI or a MAC-CE. The serving network entity may receive the request, and provide a QCL source reconfiguration 335, which may indicate the UE is to use the requested QCL source, or may indicate a different QCL source. A second QCL source 350 may be used for one or more subsequent PDxCH transmissions 340 and 345. Such techniques may allow the UE to provide assistance information to the network for a preferred QCL source based on downlink receptions at the UE.
[0085] FIG. 4 shows an example of QCL sources for periodic downlink communications 400 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The QCL sources for periodic downlink communications 400 (e.g., SPS PDSCH transmissions) may implement or be implemented by one or more aspects of the wireless communications system 100 and the wireless communications system 200 described with reference to FIGs. 1 and 2, respectively. For example, the QCL sources for periodic downlink communications 400 may be implemented by a network entity 105 and a UE 115 as described with reference to FIGs. 1 and 2 to support reduced power consumption through implementation of a LP-WUS.
[0086] In this example, a UE may be configured with a SPS configuration in which periodic PDSCH 405 transmissions may be configured at the UE. In some aspects, the UE may also be configured to monitor for a LP-WUS 410 prior to transmission of a SPS PDSCH 405, and the network entity may transmit the LP-WUS 410 in the event that downlink data is present to be transmitted to the UE, which may thus provide additional power savings at the UE through not having to monitor each SPS PDSCH 405 occasion. For example, a first SPS PDSCH 405-a occasion may not be monitored at the UE due to a lack of a WUS. Subsequently, LP-WUS 410 may be transmitted and detected at the UE, and a QCL source 415 for at least a second SPS PDSCH 405-b may be selected to correspond to the LP-WUS 410. A third SPS PDSCH 405-c may use the same QCL source 415, or the UE may return to the low power state and not monitor the third SPS PDSCH 405-c due to a lack of an associated LP-WUS. Thus, the MR of the UE may go into sleep state between adjacent PDSCH occasions, and LP-WUS 410 can wake up the MR to receive an associated SPS PDSCH 405 in the upcoming granted PDSCH occasion. Further, the UE may determine that the LP-WUS 410 is the QCL source for the upcoming second SPS PDSCH 405-b in this case. In some aspects, the QCL source of the LP-WUS will keep until the next LP-WUS or LP-SS to update the QCL source for one or more subsequent SPS PDSCH 405 transmissions. In some other aspects, the UE may monitor each SPS PDSCH 405 occasion, and the QCL source may change at some point during the configured SPS PDSCH 405 occasions, and the UE may determine that the LP-WUS 410 (or an LP-SS) is the QCL source for subsequent SPS PDSCH 405 transmissions.
[0087] FIG. 5 shows an example of a process flow 500 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The process flow 500 may implement or be implemented to realize one or more aspects of the wireless communications system 100 and the wireless communications system 200 described with reference to FIGs. 1 and 2, QCL sources for downlink communications 300 described with reference to FIG. 3, or the QCL sources for periodic downlink communications 400 described with reference to FIG. 4. For example, the process flow 500 illustrates communication between a UE 115-b and a network entity 105-b, which may be examples of corresponding devices as illustrated and described herein, including by or with reference to FIGs. 1–4.
[0088] In the following description of the process flow 500, the operations may be performed (e.g., reported or provided) in a different order than the order shown, or the operations performed by the example devices may be performed in different orders or at different times. Some operations also may be left out of the process flow 500, or other operations may be added to the process flow 500. Further, although some operations or signaling may be shown to occur at different times for discussion purposes, these operations may actually occur at the same time.
[0089] At 505, the UE 115-b optionally may transmit, and the network entity 105-b may receive, information indicative of a capability of the UE 115-b. For example, the UE 115-b may transmit an indication of a capability for LP-WUS based transitions between lower power and higher power states. In some implementations, the capability indication may also indicate a UE 115-b capability to request or indicate a preferred configuration for LP-WUS related transmissions, as discussed herein.
[0090] At 510, the network entity 105-b may transmit, and the UE 115-b may receive, information indicative of one or more LP-WUS and / or LP-SS configurations. In some implementations, the configuration information may provide an indication of a QCL source that is to be used for one or more PDxCH transmissions from the network entity 105-b, in accordance with techniques as discussed herein. In some examples, multiple different configurations may be provided to the UE 115-b, and one of the configurations may be enabled by the network entity 105-b.
[0091] At 515, the UE 115-b may determine to transition to a low-power (LP) mode. In some implementations, such a determination may be made based on the network entity 105-b enabling a LP-WUS. Additionally, or alternatively, such a determination may be made at the UE 115-b based on communications traffic between the UE 115-b and network entity 105-b. The UE 115-b may transition to the LP mode, and monitor for a LP-WUS, in accordance with techniques as discussed herein.
[0092] At 520, the network entity 105-b optionally may transmit, and the UE 115-b may receive, one or more LP-SS signals. The LP-SS signals may be used by the UE 115-b to maintain synchronization and monitor for LP-WUS transmissions. At 525, the network entity 105-b may transmit, and the UE 115-b may receive, one or more LP-WUS signals. The one or more LP-WUS signals may be transmitted in accordance with the LP-WUS configuration, in accordance with techniques as discussed herein.
[0093] At 530, the UE 115-b may select a QCL source to be used for monitoring one or more subsequent PDxCH transmissions. For example, the UE 115-b may select the QCL source to correspond to the LP-SS, the LP-WUS, a SSB, or a CSI-RS, as discussed herein. At 535, the UE 115-b may transition to a higher-power state and enable the MR, based on an indication in the LP-WUS that the UE 115-b is to transition to the higher-power state.
[0094] At 540, the network entity 105-b may transmit, and the UE 115-b may receive, a downlink transmission in accordance with the selected QCL source. Optionally, at 545, the UE 115-b may transmit, and the network entity 105-b may receive, assistance information that may provide an indication of a preferred LP WUS configuration, in accordance with techniques as discussed herein.
[0095] FIG. 6 shows a block diagram 600 of a device 605 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The device 605 may be an example of aspects of a UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communications manager 620. The device 605, or one or more components of the device 605 (e.g., the receiver 610, the transmitter 615, the communications manager 620) , may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0096] The receiver 610 may provide a 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 QCL source identification for wireless communications) . Information may be passed on to other components of the device 605. The receiver 610 may utilize a single antenna or a set of multiple antennas.
[0097] The transmitter 615 may provide a means for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit 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 QCL source identification for wireless communications) . In some examples, the transmitter 615 may be co-located with a receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a set of multiple antennas.
[0098] The communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be examples of means for performing various aspects of QCL source identification for wireless communications as described herein. For example, the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be capable of performing one or more of the functions described herein.
[0099] In some examples, the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include at least one of a processor, a digital signal processor (DSP) , a central processing unit (CPU) , a graphics processing unit (GPU) , a neural processing unit (NPU) , 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, individually or collectively, a means for performing the functions described in the present disclosure. In some examples, at least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .
[0100] Additionally, or alternatively, the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented in code (e.g., as communications management software) executed by at least one processor (e.g., referred to as a processor-executable code) . If implemented in code executed by at least one processor, the functions of the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, a GPU, a NPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .
[0101] In some examples, the communications manager 620 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 610, the transmitter 615, or both. For example, the communications manager 620 may receive information from the receiver 610, send information to the transmitter 615, or be integrated in combination with the receiver 610, the transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.
[0102] The communications manager 620 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 620 is capable of, configured to, or operable to support a means for receiving low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The communications manager 620 is capable of, configured to, or operable to support a means for receiving, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state. The communications manager 620 is capable of, configured to, or operable to support a means for monitoring, while operating in the second power state, for the downlink transmission based on a first QCL source that is selected from the set of available QCL sources in accordance with the low-power wake-up configuration information.
[0103] By including or configuring the communications manager 620 in accordance with examples as described herein, the device 605 (e.g., at least one processor controlling or otherwise coupled with the receiver 610, the transmitter 615, the communications manager 620, or a combination thereof) may support techniques for selection of a QCL source for one or more downlink communications in accordance with low-power WUR procedures, which may provide for enhanced reliability of downlink communications associated with a LP-WUS or LP-SS, reduced power consumption through reduced usage of a MR, reduced latency, improved user experience, more efficient utilization of communication resources, and longer battery life.
[0104] FIG. 7 shows a block diagram 700 of a device 705 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The device 705 may be an example of aspects of a device 605 or a UE 115 as described herein. The device 705 may include a receiver 710, a transmitter 715, and a communications manager 720. The device 705, or one or more components of the device 705 (e.g., the receiver 710, the transmitter 715, the communications manager 720) , may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0105] The receiver 710 may provide a 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 QCL source identification for wireless communications) . Information may be passed on to other components of the device 705. The receiver 710 may utilize a single antenna or a set of multiple antennas.
[0106] The transmitter 715 may provide a means for transmitting signals generated by other components of the device 705. For example, the transmitter 715 may transmit 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 QCL source identification for wireless communications) . In some examples, the transmitter 715 may be co-located with a receiver 710 in a transceiver module. The transmitter 715 may utilize a single antenna or a set of multiple antennas.
[0107] The device 705, or various components thereof, may be an example of means for performing various aspects of QCL source identification for wireless communications as described herein. For example, the communications manager 720 may include a configuration component 725, an LP wake-up radio 730, a receive circuitry 735, or any combination thereof. The communications manager 720 may be an example of aspects of a communications manager 620 as described herein. In some examples, the communications manager 720, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 710, the transmitter 715, or both. For example, the communications manager 720 may receive information from the receiver 710, send information to the transmitter 715, or be integrated in combination with the receiver 710, the transmitter 715, or both to obtain information, output information, or perform various other operations as described herein.
[0108] The communications manager 720 may support wireless communications in accordance with examples as disclosed herein. The configuration component 725 is capable of, configured to, or operable to support a means for receiving low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The LP wake-up radio 730 is capable of, configured to, or operable to support a means for receiving, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state. The receive circuitry 735 is capable of, configured to, or operable to support a means for monitoring, while operating in the second power state, for the downlink transmission based on a first QCL source that is selected from the set of available QCL sources in accordance with the low-power wake-up configuration information.
[0109] FIG. 8 shows a block diagram 800 of a communications manager 820 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The communications manager 820 may be an example of aspects of a communications manager 620, a communications manager 720, or both, as described herein. The communications manager 820, or various components thereof, may be an example of means for performing various aspects of QCL source identification for wireless communications as described herein. For example, the communications manager 820 may include a configuration component 825, an LP wake-up radio 830, a receive circuitry 835, a QCL source selection component 840, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories) , may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
[0110] The communications manager 820 may support wireless communications in accordance with examples as disclosed herein. The configuration component 825 is capable of, configured to, or operable to support a means for receiving low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The LP wake-up radio 830 is capable of, configured to, or operable to support a means for receiving, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state. The receive circuitry 835 is capable of, configured to, or operable to support a means for monitoring, while operating in the second power state, for the downlink transmission based on a first QCL source that is selected from the set of available QCL sources in accordance with the low-power wake-up configuration information.
[0111] In some examples, the first QCL source is selected from a latest one of the low-power synchronization signal, low-power wake-up signal, SSB, or channel state information reference signal, that is received at the UE.
[0112] In some examples, the low-power wake-up configuration information further indicates a type of QCL associated with each QCL source of the set of available QCL sources.
[0113] In some examples, to support receiving the low-power wake-up configuration information, the configuration component 825 is capable of, configured to, or operable to support a means for receiving radio resource control signaling, a medium access control (MAC) control element, or any combination thereof, that provides a transmission configuration indicator (TCI) state associated with the downlink transmission and that indicates which of the low-power synchronization signal, the low-power wake-up signal, the SSB, or the channel state information reference signal, are available for selection as the first QCL source.
[0114] In some examples, the first QCL source is specified to be selected from the QCL source of one of the low-power synchronization signal, low-power wake-up signal, SSB, or channel state information reference signal. In some examples, the low-power wake-up configuration information indicates that a most recent one of the low-power synchronization signal, low-power wake-up signal, SSB, or channel state information reference signal that is received at the UE is to be selected as the first QCL source.
[0115] In some examples, the UE selects the first QCL source from the set of available QCL sources based on which QCL source of the set of available QCL sources is most likely to provide a successful reception of the downlink transmission.
[0116] In some examples, the low-power wake-up configuration information indicates a default QCL source for the downlink transmission, and the first QCL source is set to the default QCL source or a different QCL source that is indicated to the UE subsequent to the low-power wake-up configuration information, and where the different QCL source is indicated in radio resource control signaling, in a medium access control (MAC) control element, or downlink control information.
[0117] In some examples, the QCL source selection component 840 is capable of, configured to, or operable to support a means for transmitting, to a network entity, an indication of a preferred QCL source for the downlink transmission that indicates one of the set of available QCL sources.
[0118] In some examples, the downlink transmission is a dynamically scheduled downlink transmission, or is a downlink shared channel transmission in accordance with a semi-persistent scheduling configuration.
[0119] In some examples, the low-power synchronization signal and the low-power wake-up signal use a unified transmission configuration indicator (TCI) state with one of the SSB or the channel state information reference signal. In some examples, the low-power synchronization signal and the low-power wake-up signal use a TCI state that is independent of a TCI state of the SSB and the channel state information reference signal.
[0120] FIG. 9 shows a diagram of a system 900 including a device 905 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The device 905 may be an example of or include components of a device 605, a device 705, or a UE 115 as described herein. The device 905 may communicate (e.g., wirelessly) with one or more other devices (e.g., network entities 105, UEs 115, or a combination thereof) . The device 905 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 920, an input / output (I / O) controller, such as an I / O controller 910, a transceiver 915, one or more antennas 925, at least one memory 930, code 935, and at least one processor 940. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 945) .
[0121] The I / O controller 910 may manage input and output signals for the device 905. The I / O controller 910 may also manage peripherals not integrated into the device 905. In some cases, the I / O controller 910 may represent a physical connection or port to an external peripheral. In some cases, the I / O controller 910 may utilize an operating system such as or another known operating system. Additionally, or alternatively, the I / O controller 910 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I / O controller 910 may be implemented as part of one or more processors, such as the at least one processor 940. In some cases, a user may interact with the device 905 via the I / O controller 910 or via hardware components controlled by the I / O controller 910.
[0122] In some cases, the device 905 may include a single antenna. However, in some other cases, the device 905 may have more than one antenna, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 915 may communicate bi-directionally via the one or more antennas 925 using wired or wireless links as described herein. For example, the transceiver 915 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 915 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 925 for transmission, and to demodulate packets received from the one or more antennas 925. The transceiver 915, or the transceiver 915 and one or more antennas 925, may be an example of a transmitter 615, a transmitter 715, a receiver 610, a receiver 710, or any combination thereof or component thereof, as described herein.
[0123] The at least one memory 930 may include random access memory (RAM) and read-only memory (ROM) . The at least one memory 930 may store computer-readable, computer-executable, or processor-executable code, such as the code 935. The code 935 may include instructions that, when executed by the at least one processor 940, cause the device 905 to perform various functions described herein. The code 935 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 935 may not be directly executable by the at least one processor 940 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the at least one memory 930 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0124] The at least one processor 940 may include one or more intelligent hardware devices (e.g., one or more general-purpose processors, one or more DSPs, one or more CPUs, one or more GPUs, one or more NPUs (also referred to as neural network processors or deep learning processors (DLPs) ) , one or more microcontrollers, one or more ASICs, one or more FPGAs, one or more programmable logic devices, discrete gate or transistor logic, one or more discrete hardware components, or any combination thereof) . In some cases, the at least one processor 940 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the at least one processor 940. The at least one processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., the at least one memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks supporting QCL source identification for wireless communications) . For example, the device 905 or a component of the device 905 may include at least one processor 940 and at least one memory 930 coupled with or to the at least one processor 940, the at least one processor 940 and the at least one memory 930 configured to perform various functions described herein.
[0125] In some examples, the at least one processor 940 may include multiple processors and the at least one memory 930 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions described herein. In some examples, the at least one processor 940 may be a component of a processing system, which may refer to a system (such as a series) of machines, circuitry (including, for example, one or both of processor circuitry (which may include the at least one processor 940) and memory circuitry (which may include the at least one memory 930) ) , or components, that receives or obtains inputs and processes the inputs to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, the at least one processor 940 or a processing system including the at least one processor 940 may be configured to, configurable to, or operable to cause the device 905 to perform one or more of the functions described herein. Further, as described herein, being “configured to, ” being “configurable to, ” and being “operable to” may be used interchangeably and may be associated with a capability, when executing code 935 (e.g., processor-executable code) stored in the at least one memory 930 or otherwise, to perform one or more of the functions described herein.
[0126] The communications manager 920 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 920 is capable of, configured to, or operable to support a means for receiving low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The communications manager 920 is capable of, configured to, or operable to support a means for receiving, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state. The communications manager 920 is capable of, configured to, or operable to support a means for monitoring, while operating in the second power state, for the downlink transmission based on a first QCL source that is selected from the set of available QCL sources in accordance with the low-power wake-up configuration information.
[0127] By including or configuring the communications manager 920 in accordance with examples as described herein, the device 905 may support techniques for selection of a QCL source for one or more downlink communications in accordance with low-power WUR procedures, which may provide for enhanced reliability of downlink communications associated with a LP-WUS or LP-SS, reduced power consumption through reduced usage of a MR, reduced latency, improved user experience, more efficient utilization of communication resources, and longer battery life.
[0128] In some examples, the communications manager 920 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 915, the one or more antennas 925, or any combination thereof. Although the communications manager 920 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 920 may be supported by or performed by the at least one processor 940, the at least one memory 930, the code 935, or any combination thereof. For example, the code 935 may include instructions executable by the at least one processor 940 to cause the device 905 to perform various aspects of QCL source identification for wireless communications as described herein, or the at least one processor 940 and the at least one memory 930 may be otherwise configured to, individually or collectively, perform or support such operations.
[0129] FIG. 10 shows a block diagram 1000 of a device 1005 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The device 1005 may be an example of aspects of a network entity 105 as described herein. The device 1005 may include a receiver 1010, a transmitter 1015, and a communications manager 1020. The device 1005, or one or more components of the device 1005 (e.g., the receiver 1010, the transmitter 1015, the communications manager 1020) , may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0130] The receiver 1010 may provide a means for obtaining (e.g., receiving, determining, identifying) information such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . Information may be passed on to other components of the device 1005. In some examples, the receiver 1010 may support obtaining information by receiving signals via one or more antennas. Additionally, or alternatively, the receiver 1010 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
[0131] The transmitter 1015 may provide a means for outputting (e.g., transmitting, providing, conveying, sending) information generated by other components of the device 1005. For example, the transmitter 1015 may output information such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . In some examples, the transmitter 1015 may support outputting information by transmitting signals via one or more antennas. Additionally, or alternatively, the transmitter 1015 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1015 and the receiver 1010 may be co-located in a transceiver, which may include or be coupled with a modem.
[0132] The communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be examples of means for performing various aspects of QCL source identification for wireless communications as described herein. For example, the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be capable of performing one or more of the functions described herein.
[0133] In some examples, the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include at least one of a processor, a DSP, a CPU, a GPU, a NPU, an ASIC, an 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, individually or collectively, a means for performing the functions described in the present disclosure. In some examples, at least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .
[0134] Additionally, or alternatively, the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be implemented in code (e.g., as communications management software) executed by at least one processor (e.g., referred to as a processor-executable code) . If implemented in code executed by at least one processor, the functions of the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, a GPU, a NPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .
[0135] In some examples, the communications manager 1020 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1010, the transmitter 1015, or both. For example, the communications manager 1020 may receive information from the receiver 1010, send information to the transmitter 1015, or be integrated in combination with the receiver 1010, the transmitter 1015, or both to obtain information, output information, or perform various other operations as described herein.
[0136] The communications manager 1020 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 1020 is capable of, configured to, or operable to support a means for outputting, to a UE, low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The communications manager 1020 is capable of, configured to, or operable to support a means for outputting the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption at the UE than the first power state. The communications manager 1020 is capable of, configured to, or operable to support a means for outputting for the downlink transmission using a first QCL source that is selected in accordance with the low-power wake-up configuration information.
[0137] By including or configuring the communications manager 1020 in accordance with examples as described herein, the device 1005 (e.g., at least one processor controlling or otherwise coupled with the receiver 1010, the transmitter 1015, the communications manager 1020, or a combination thereof) may support techniques for selection of a QCL source for one or more downlink communications in accordance with low-power WUR procedures, which may provide for enhanced reliability of downlink communications associated with a LP-WUS or LP-SS, reduced power consumption through reduced usage of a MR, reduced latency, improved user experience, more efficient utilization of communication resources, and longer battery life.
[0138] FIG. 11 shows a block diagram 1100 of a device 1105 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The device 1105 may be an example of aspects of a device 1005 or a network entity 105 as described herein. The device 1105 may include a receiver 1110, a transmitter 1115, and a communications manager 1120. The device 1105, or one or more components of the device 1105 (e.g., the receiver 1110, the transmitter 1115, the communications manager 1120) , may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0139] The receiver 1110 may provide a means for obtaining (e.g., receiving, determining, identifying) information such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . Information may be passed on to other components of the device 1105. In some examples, the receiver 1110 may support obtaining information by receiving signals via one or more antennas. Additionally, or alternatively, the receiver 1110 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
[0140] The transmitter 1115 may provide a means for outputting (e.g., transmitting, providing, conveying, sending) information generated by other components of the device 1105. For example, the transmitter 1115 may output information such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . In some examples, the transmitter 1115 may support outputting information by transmitting signals via one or more antennas. Additionally, or alternatively, the transmitter 1115 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1115 and the receiver 1110 may be co-located in a transceiver, which may include or be coupled with a modem.
[0141] The device 1105, or various components thereof, may be an example of means for performing various aspects of QCL source identification for wireless communications as described herein. For example, the communications manager 1120 may include a configuration component 1125, an LP wake-up signal transmitter 1130, a downlink communication transmit circuitry 1135, or any combination thereof. The communications manager 1120 may be an example of aspects of a communications manager 1020 as described herein. In some examples, the communications manager 1120, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1110, the transmitter 1115, or both. For example, the communications manager 1120 may receive information from the receiver 1110, send information to the transmitter 1115, or be integrated in combination with the receiver 1110, the transmitter 1115, or both to obtain information, output information, or perform various other operations as described herein.
[0142] The communications manager 1120 may support wireless communications in accordance with examples as disclosed herein. The configuration component 1125 is capable of, configured to, or operable to support a means for outputting, to a UE, low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The LP wake-up signal transmitter 1130 is capable of, configured to, or operable to support a means for outputting the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption at the UE than the first power state. The downlink communication transmit circuitry 1135 is capable of, configured to, or operable to support a means for outputting for the downlink transmission using a first QCL source that is selected in accordance with the low-power wake-up configuration information.
[0143] FIG. 12 shows a block diagram 1200 of a communications manager 1220 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The communications manager 1220 may be an example of aspects of a communications manager 1020, a communications manager 1120, or both, as described herein. The communications manager 1220, or various components thereof, may be an example of means for performing various aspects of QCL source identification for wireless communications as described herein. For example, the communications manager 1220 may include a configuration component 1225, an LP wake-up signal transmitter 1230, a downlink communication transmit circuitry 1235, a QCL source selection component 1240, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories) , may communicate, directly or indirectly, with one another (e.g., via one or more buses) . The communications may include communications within a protocol layer of a protocol stack, communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack, within a device, component, or virtualized component associated with a network entity 105, between devices, components, or virtualized components associated with a network entity 105) , or any combination thereof.
[0144] The communications manager 1220 may support wireless communications in accordance with examples as disclosed herein. The configuration component 1225 is capable of, configured to, or operable to support a means for outputting, to a UE, low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The LP wake-up signal transmitter 1230 is capable of, configured to, or operable to support a means for outputting the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption at the UE than the first power state. The downlink communication transmit circuitry 1235 is capable of, configured to, or operable to support a means for outputting for the downlink transmission using a first QCL source that is selected in accordance with the low-power wake-up configuration information.
[0145] In some examples, the first QCL source is selected from a latest one of the low-power synchronization signal, low-power wake-up signal, SSB, or channel state information reference signal, that is transmitted to the UE.
[0146] In some examples, the low-power wake-up configuration information further indicates a type of QCL associated with each QCL source of the set of available QCL sources.
[0147] In some examples, to support outputting the low-power wake-up configuration information, the configuration component 1225 is capable of, configured to, or operable to support a means for outputting radio resource control signaling, a medium access control (MAC) control element, or any combination thereof, that provides a transmission configuration indicator (TCI) state associated with the downlink transmission and that indicates which of the low-power synchronization signal, the low-power wake-up signal, the SSB, or the channel state information reference signal, are available for selection as the first QCL source.
[0148] In some examples, the first QCL source is specified to be selected from the QCL source of one of the low-power synchronization signal, low-power wake-up signal, SSB, or channel state information reference signal. In some examples, the low-power wake-up configuration information indicates that a most recent one of the low-power synchronization signal, low-power wake-up signal, SSB, or channel state information reference signal that is received at the UE is to be selected as the first QCL source.
[0149] In some examples, the low-power wake-up configuration information indicates a default QCL source for the downlink transmission, and the first QCL source is set to the default QCL source or a different QCL source that is indicated to the UE subsequent to the low-power wake-up configuration information, and where the different QCL source is indicated in radio resource control signaling, in a medium access control (MAC) control element, or downlink control information.
[0150] In some examples, the QCL source selection component 1240 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a preferred QCL source for the downlink transmission that indicates one of the set of available QCL sources, and where the first QCL source is selected in accordance with the indication of the preferred QCL source.
[0151] In some examples, the downlink transmission is a dynamically scheduled downlink transmission, or is a downlink shared channel transmission in accordance with a semi-persistent scheduling configuration.
[0152] In some examples, the low-power synchronization signal and the low-power wake-up signal use a unified transmission configuration indicator (TCI) state with one of the SSB or the channel state information reference signal. In some examples, the low-power synchronization signal and the low-power wake-up signal use a TCI state that is independent of a TCI state of the SSB and the channel state information reference signal.
[0153] FIG. 13 shows a diagram of a system 1300 including a device 1305 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The device 1305 may be an example of or include components of a device 1005, a device 1105, or a network entity 105 as described herein. The device 1305 may communicate with other network devices or network equipment such as one or more of the network entities 105, UEs 115, or any combination thereof. The communications may include communications over one or more wired interfaces, over one or more wireless interfaces, or any combination thereof. The device 1305 may include components that support outputting and obtaining communications, such as a communications manager 1320, a transceiver 1310, one or more antennas 1315, at least one memory 1325, code 1330, and at least one processor 1335. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1340) .
[0154] The transceiver 1310 may support bi-directional communications via wired links, wireless links, or both as described herein. In some examples, the transceiver 1310 may include a wired transceiver and may communicate bi-directionally with another wired transceiver. Additionally, or alternatively, in some examples, the transceiver 1310 may include a wireless transceiver and may communicate bi-directionally with another wireless transceiver. In some examples, the device 1305 may include one or more antennas 1315, which may be capable of transmitting or receiving wireless transmissions (e.g., concurrently) . The transceiver 1310 may also include a modem to modulate signals, to provide the modulated signals for transmission (e.g., by one or more antennas 1315, by a wired transmitter) , to receive modulated signals (e.g., from one or more antennas 1315, from a wired receiver) , and to demodulate signals. In some implementations, the transceiver 1310 may include one or more interfaces, such as one or more interfaces coupled with the one or more antennas 1315 that are configured to support various receiving or obtaining operations, or one or more interfaces coupled with the one or more antennas 1315 that are configured to support various transmitting or outputting operations, or a combination thereof. In some implementations, the transceiver 1310 may include or be configured for coupling with one or more processors or one or more memory components that are operable to perform or support operations based on received or obtained information or signals, or to generate information or other signals for transmission or other outputting, or any combination thereof. In some implementations, the transceiver 1310, or the transceiver 1310 and the one or more antennas 1315, or the transceiver 1310 and the one or more antennas 1315 and one or more processors or one or more memory components (e.g., the at least one processor 1335, the at least one memory 1325, or both) , may be included in a chip or chip assembly that is installed in the device 1305. In some examples, the transceiver 1310 may be operable to support communications via one or more communications links (e.g., communication link (s) 125, backhaul communication link (s) 120, a midhaul communication link 162, a fronthaul communication link 168) .
[0155] The at least one memory 1325 may include RAM, ROM, or any combination thereof. The at least one memory 1325 may store computer-readable, computer-executable, or processor-executable code, such as the code 1330. The code 1330 may include instructions that, when executed by one or more of the at least one processor 1335, cause the device 1305 to perform various functions described herein. The code 1330 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 1330 may not be directly executable by a processor of the at least one processor 1335 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the at least one memory 1325 may include, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices. In some examples, the at least one processor 1335 may include multiple processors and the at least one memory 1325 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories which may, individually or collectively, be configured to perform various functions herein (for example, as part of a processing system) .
[0156] The at least one processor 1335 may include one or more intelligent hardware devices (e.g., one or more general-purpose processors, one or more DSPs, one or more CPUs, one or more GPUs, one or more NPUs (also referred to as neural network processors or DLPs) , one or more microcontrollers, one or more ASICs, one or more FPGAs, one or more programmable logic devices, discrete gate or transistor logic, one or more discrete hardware components, or any combination thereof) . In some cases, the at least one processor 1335 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into one or more of the at least one processor 1335. The at least one processor 1335 may be configured to execute computer-readable instructions stored in a memory (e.g., one or more of the at least one memory 1325) to cause the device 1305 to perform various functions (e.g., functions or tasks supporting QCL source identification for wireless communications) . For example, the device 1305 or a component of the device 1305 may include at least one processor 1335 and at least one memory 1325 coupled with one or more of the at least one processor 1335, the at least one processor 1335 and the at least one memory 1325 configured to perform various functions described herein. The at least one processor 1335 may be an example of a cloud-computing platform (e.g., one or more physical nodes and supporting software such as operating systems, virtual machines, or container instances) that may host the functions (e.g., by executing code 1330) to perform the functions of the device 1305. The at least one processor 1335 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in the device 1305 (such as within one or more of the at least one memory 1325) .
[0157] In some examples, the at least one processor 1335 may include multiple processors and the at least one memory 1325 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein. In some examples, the at least one processor 1335 may be a component of a processing system, which may refer to a system (such as a series) of machines, circuitry (including, for example, one or both of processor circuitry (which may include the at least one processor 1335) and memory circuitry (which may include the at least one memory 1325) ) , or components, that receives or obtains inputs and processes the inputs to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, the at least one processor 1335 or a processing system including the at least one processor 1335 may be configured to, configurable to, or operable to cause the device 1305 to perform one or more of the functions described herein. Further, as described herein, being “configured to, ” being “configurable to, ” and being “operable to” may be used interchangeably and may be associated with a capability, when executing code stored in the at least one memory 1325 or otherwise, to perform one or more of the functions described herein.
[0158] In some examples, a bus 1340 may support communications of (e.g., within) a protocol layer of a protocol stack. In some examples, a bus 1340 may support communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack) , which may include communications performed within a component of the device 1305, or between different components of the device 1305 that may be co-located or located in different locations (e.g., where the device 1305 may refer to a system in which one or more of the communications manager 1320, the transceiver 1310, the at least one memory 1325, the code 1330, and the at least one processor 1335 may be located in one of the different components or divided between different components) .
[0159] In some examples, the communications manager 1320 may manage aspects of communications with a core network 130 (e.g., via one or more wired or wireless backhaul links) . For example, the communications manager 1320 may manage the transfer of data communications for client devices, such as one or more UEs 115. In some examples, the communications manager 1320 may manage communications with one or more other network entities 105, and may include a controller or scheduler for controlling communications with UEs 115 (e.g., in cooperation with the one or more other network devices) . In some examples, the communications manager 1320 may support an X2 interface within an LTE / LTE-A wireless communications network technology to provide communication between network entities 105.
[0160] The communications manager 1320 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 1320 is capable of, configured to, or operable to support a means for outputting, to a UE, low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The communications manager 1320 is capable of, configured to, or operable to support a means for outputting the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption at the UE than the first power state. The communications manager 1320 is capable of, configured to, or operable to support a means for outputting for the downlink transmission using a first QCL source that is selected in accordance with the low-power wake-up configuration information.
[0161] By including or configuring the communications manager 1320 in accordance with examples as described herein, the device 1305 may support techniques for selection of a QCL source for one or more downlink communications in accordance with low-power WUR procedures, which may provide for enhanced reliability of downlink communications associated with a LP-WUS or LP-SS, reduced power consumption through reduced usage of a MR, reduced latency, improved user experience, more efficient utilization of communication resources, and longer battery life.
[0162] In some examples, the communications manager 1320 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the transceiver 1310, the one or more antennas 1315 (e.g., where applicable) , or any combination thereof. Although the communications manager 1320 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1320 may be supported by or performed by the transceiver 1310, one or more of the at least one processor 1335, one or more of the at least one memory 1325, the code 1330, or any combination thereof (for example, by a processing system including at least a portion of the at least one processor 1335, the at least one memory 1325, the code 1330, or any combination thereof) . For example, the code 1330 may include instructions executable by one or more of the at least one processor 1335 to cause the device 1305 to perform various aspects of QCL source identification for wireless communications as described herein, or the at least one processor 1335 and the at least one memory 1325 may be otherwise configured to, individually or collectively, perform or support such operations.
[0163] FIG. 14 shows a flowchart illustrating a method 1400 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The operations of the method 1400 may be implemented by a UE or its components as described herein. For example, the operations of the method 1400 may be performed by a UE 115 as described with reference to FIGs. 1 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0164] At 1405, the method may include receiving low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The operations of 1405 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1405 may be performed by a configuration component 825 as described with reference to FIG. 8.
[0165] At 1410, the method may include receiving, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state. The operations of 1410 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1410 may be performed by an LP wake-up radio 830 as described with reference to FIG. 8.
[0166] At 1415, the method may include monitoring, while operating in the second power state, for the downlink transmission based on a first QCL source that is selected from the set of available QCL sources in accordance with the low-power wake-up configuration information. The operations of 1415 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1415 may be performed by a receive circuitry 835 as described with reference to FIG. 8.
[0167] FIG. 15 shows a flowchart illustrating a method 1500 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The operations of the method 1500 may be implemented by a UE or its components as described herein. For example, the operations of the method 1500 may be performed by a UE 115 as described with reference to FIGs. 1 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0168] At 1505, the method may include receiving low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The operations of 1505 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1505 may be performed by a configuration component 825 as described with reference to FIG. 8.
[0169] At 1510, the method may include receiving radio resource control signaling, a medium access control (MAC) control element, or any combination thereof, that provides a transmission configuration indicator (TCI) state associated with the downlink transmission and that indicates which of the low-power synchronization signal, the low-power wake-up signal, the SSB, or the channel state information reference signal, are available for selection as the first QCL source. The operations of 1510 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1510 may be performed by a configuration component 825 as described with reference to FIG. 8.
[0170] At 1515, the method may include receiving, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state. The operations of 1515 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1515 may be performed by an LP wake-up radio 830 as described with reference to FIG. 8.
[0171] At 1520, the method may include monitoring, while operating in the second power state, for the downlink transmission based on a first QCL source that is selected from the set of available QCL sources in accordance with the low-power wake-up configuration information. The operations of 1520 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1520 may be performed by a receive circuitry 835 as described with reference to FIG. 8.
[0172] FIG. 16 shows a flowchart illustrating a method 1600 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The operations of the method 1600 may be implemented by a UE or its components as described herein. For example, the operations of the method 1600 may be performed by a UE 115 as described with reference to FIGs. 1 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0173] At 1605, the method may include receiving low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The operations of 1605 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1605 may be performed by a configuration component 825 as described with reference to FIG. 8.
[0174] At 1610, the method may include transmitting, to a network entity, an indication of a preferred QCL source for the downlink transmission that indicates one of the set of available QCL sources. The operations of 1610 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1610 may be performed by a QCL source selection component 840 as described with reference to FIG. 8.
[0175] At 1615, the method may include receiving, while operating in a first power state, the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption than the first power state. The operations of 1615 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1615 may be performed by an LP wake-up radio 830 as described with reference to FIG. 8.
[0176] At 1620, the method may include monitoring, while operating in the second power state, for the downlink transmission based on a first QCL source that is selected from the set of available QCL sources in accordance with the low-power wake-up configuration information. The operations of 1620 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1620 may be performed by a receive circuitry 835 as described with reference to FIG. 8.
[0177] FIG. 17 shows a flowchart illustrating a method 1700 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The operations of the method 1700 may be implemented by a network entity or its components as described herein. For example, the operations of the method 1700 may be performed by a network entity as described with reference to FIGs. 1 through 5 and 10 through 13. In some examples, a network entity may execute a set of instructions to control the functional elements of the network entity to perform the described functions. Additionally, or alternatively, the network entity may perform aspects of the described functions using special-purpose hardware.
[0178] At 1705, the method may include outputting, to a UE, low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The operations of 1705 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1705 may be performed by a configuration component 1225 as described with reference to FIG. 12.
[0179] At 1710, the method may include outputting the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption at the UE than the first power state. The operations of 1710 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1710 may be performed by an LP wake-up signal transmitter 1230 as described with reference to FIG. 12.
[0180] At 1715, the method may include outputting for the downlink transmission using a first QCL source that is selected in accordance with the low-power wake-up configuration information. The operations of 1715 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1715 may be performed by a downlink communication transmit circuitry 1235 as described with reference to FIG. 12.
[0181] FIG. 18 shows a flowchart illustrating a method 1800 that supports QCL source identification for wireless communications in accordance with one or more aspects of the present disclosure. The operations of the method 1800 may be implemented by a network entity or its components as described herein. For example, the operations of the method 1800 may be performed by a network entity as described with reference to FIGs. 1 through 5 and 10 through 13. In some examples, a network entity may execute a set of instructions to control the functional elements of the network entity to perform the described functions. Additionally, or alternatively, the network entity may perform aspects of the described functions using special-purpose hardware.
[0182] At 1805, the method may include outputting, to a UE, low-power wake-up configuration information that indicates a QCL source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, where the QCL source is configured to be selected from a set of available QCL sources that includes a QCL source of a low-power synchronization signal, a QCL source of the low-power wake-up signal, a QCL source of a SSB, and a QCL source of a channel state information reference signal. The operations of 1805 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1805 may be performed by a configuration component 1225 as described with reference to FIG. 12.
[0183] At 1810, the method may include receiving, from the UE, an indication of a preferred QCL source for the downlink transmission that indicates one of the set of available QCL sources, and where the first QCL source is selected in accordance with the indication of the preferred QCL source. The operations of 1810 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1810 may be performed by a QCL source selection component 1240 as described with reference to FIG. 12.
[0184] At 1815, the method may include outputting the low-power wake-up signal, where the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and where the second power state is associated with higher power consumption at the UE than the first power state. The operations of 1815 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1815 may be performed by an LP wake-up signal transmitter 1230 as described with reference to FIG. 12.
[0185] At 1820, the method may include outputting for the downlink transmission using a first QCL source that is selected in accordance with the low-power wake-up configuration information. The operations of 1820 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1820 may be performed by a downlink communication transmit circuitry 1235 as described with reference to FIG. 12.
[0186] The following provides an overview of aspects of the present disclosure:
[0187] Aspect 1: A method for wireless communications at a UE, comprising: receiving low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, wherein the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal; receiving, while operating in a first power state, the low-power wake-up signal, wherein the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and wherein the second power state is associated with higher power consumption than the first power state; and monitoring, while operating in the second power state, for the downlink transmission based at least in part on a first quasi-co-location source that is selected from the set of available quasi-co-location sources in accordance with the low-power wake-up configuration information.
[0188] Aspect 2: The method of aspect 1, wherein the first quasi-co-location source is selected from a latest one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal, that is received at the UE.
[0189] Aspect 3: The method of any of aspects 1 through 2, wherein the low-power wake-up configuration information further indicates a type of quasi-co-location associated with each quasi-co-location source of the set of available quasi-co-location sources.
[0190] Aspect 4: The method of any of aspects 1 through 3, wherein receiving the low-power wake-up configuration information comprises: receiving radio resource control signaling, a medium access control (MAC) control element, or any combination thereof, that provides a transmission configuration indicator (TCI) state associated with the downlink transmission and that indicates which of the low-power synchronization signal, the low-power wake-up signal, the synchronization signal block, or the channel state information reference signal, are available for selection as the first quasi-co-location source.
[0191] Aspect 5: The method of any of aspects 1 through 4, wherein the first quasi-co-location source is specified to be selected from the quasi-co-location source of one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal, and the low-power wake-up configuration information indicates that a most recent one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal that is received at the UE is to be selected as the first quasi-co-location source.
[0192] Aspect 6: The method of any of aspects 1 through 5, wherein the UE selects the first quasi-co-location source from the set of available quasi-co-location sources based at least in part on which quasi-co-location source of the set of available quasi-co-location sources is most likely to provide a successful reception of the downlink transmission.
[0193] Aspect 7: The method of any of aspects 1 through 6, wherein the low-power wake-up configuration information indicates a default quasi-co-location source for the downlink transmission, and the first quasi-co-location source is set to the default quasi-co-location source or a different quasi-co-location source that is indicated to the UE subsequent to the low-power wake-up configuration information, and wherein the different quasi-co-location source is indicated in radio resource control signaling, in a medium access control (MAC) control element, or downlink control information.
[0194] Aspect 8: The method of any of aspects 1 through 7, further comprising: transmitting, to a network entity, an indication of a preferred quasi-co-location source for the downlink transmission that indicates one of the set of available quasi-co-location sources.
[0195] Aspect 9: The method of any of aspects 1 through 8, wherein the downlink transmission is a dynamically scheduled downlink transmission, or is a downlink shared channel transmission in accordance with a semi-persistent scheduling configuration.
[0196] Aspect 10: The method of any of aspects 1 through 9, wherein the low-power synchronization signal and the low-power wake-up signal use a unified transmission configuration indicator (TCI) state with one of the synchronization signal block or the channel state information reference signal, or the low-power synchronization signal and the low-power wake-up signal use a TCI state that is independent of a TCI state of the synchronization signal block and the channel state information reference signal.
[0197] Aspect 11: A method for wireless communications at a network entity, comprising: outputting, to a UE, low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored for upon reception of a low-power wake-up signal at the UE, wherein the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal; outputting the low-power wake-up signal, wherein the low-power wake-up signal indicates the UE is to transition from a first power state to a second power state and monitor for the downlink transmission, and wherein the second power state is associated with higher power consumption at the UE than the first power state; and outputting for the downlink transmission using a first quasi-co-location source that is selected in accordance with the low-power wake-up configuration information.
[0198] Aspect 12: The method of aspect 11, wherein the first quasi-co-location source is selected from a latest one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal, that is transmitted to the UE.
[0199] Aspect 13: The method of any of aspects 11 through 12, wherein the low-power wake-up configuration information further indicates a type of quasi-co-location associated with each quasi-co-location source of the set of available quasi-co-location sources.
[0200] Aspect 14: The method of any of aspects 11 through 13, wherein outputting the low-power wake-up configuration information comprises: outputting radio resource control signaling, a medium access control (MAC) control element, or any combination thereof, that provides a transmission configuration indicator (TCI) state associated with the downlink transmission and that indicates which of the low-power synchronization signal, the low-power wake-up signal, the synchronization signal block, or the channel state information reference signal, are available for selection as the first quasi-co-location source.
[0201] Aspect 15: The method of any of aspects 11 through 14, wherein the first quasi-co-location source is specified to be selected from the quasi-co-location source of one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal, and the low-power wake-up configuration information indicates that a most recent one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal that is received at the UE is to be selected as the first quasi-co-location source.
[0202] Aspect 16: The method of any of aspects 11 through 15, wherein the low-power wake-up configuration information indicates a default quasi-co-location source for the downlink transmission, and the first quasi-co-location source is set to the default quasi-co-location source or a different quasi-co-location source that is indicated to the UE subsequent to the low-power wake-up configuration information, and wherein the different quasi-co-location source is indicated in radio resource control signaling, in a medium access control (MAC) control element, or downlink control information.
[0203] Aspect 17: The method of any of aspects 11 through 16, further comprising: receiving, from the UE, an indication of a preferred quasi-co-location source for the downlink transmission that indicates one of the set of available quasi-co-location sources, and wherein the first quasi-co-location source is selected in accordance with the indication of the preferred quasi-co-location source.
[0204] Aspect 18: The method of any of aspects 11 through 17, wherein the downlink transmission is a dynamically scheduled downlink transmission, or is a downlink shared channel transmission in accordance with a semi-persistent scheduling configuration.
[0205] Aspect 19: The method of any of aspects 11 through 18, wherein the low-power synchronization signal and the low-power wake-up signal use a unified transmission configuration indicator (TCI) state with one of the synchronization signal block or the channel state information reference signal, or the low-power synchronization signal and the low-power wake-up signal use a TCI state that is independent of a TCI state of the synchronization signal block and the channel state information reference signal.
[0206] Aspect 20: A UE for wireless communications, comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to perform a method of any of aspects 1 through 10.
[0207] Aspect 21: A UE for wireless communications, comprising at least one means for performing a method of any of aspects 1 through 10.
[0208] Aspect 22: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by at least one processor to perform a method of any of aspects 1 through 10.
[0209] Aspect 23: A network entity for wireless communications, comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network entity to perform a method of any of aspects 11 through 19.
[0210] Aspect 24: A network entity for wireless communications, comprising at least one means for performing a method of any of aspects 11 through 19.
[0211] Aspect 25: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by at least one processor to perform a method of any of aspects 11 through 19.
[0212] It should be noted that the methods described herein describe possible implementations. The operations and the steps may be rearranged or otherwise modified and other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0213] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications 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, as well as other systems and radio technologies not explicitly mentioned herein.
[0214] 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 that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0215] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general-purpose processor, a DSP, an ASIC, a CPU, a GPU, a NPU, an 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, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) . Any functions or operations described herein as being capable of being performed by a processor may be performed by multiple processors that, individually or collectively, are capable of performing the described functions or operations.
[0216] The functions described herein may be implemented using hardware, software (e.g., executed by a processor) , or any combination thereof. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. If implemented using software executed by a processor, the functions may be stored as or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0217] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, phase change memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the 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 microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media. Any functions or operations described herein as being capable of being performed by a memory may be performed by multiple memories that, individually or collectively, are capable of performing the described functions or operations.
[0218] As used herein, including in the claims, “or” as used in a list of items (e.g., including a list of items prefaced 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, e.g., A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. ” As used herein, the term “and / or, ” when used in a list of two or more items, means that any one of the listed items can be employed by itself, or any combination of two or more of the listed items can be employed. For example, if a composition is described as containing components A, B, and / or C, the composition can contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination.
[0219] As used herein, including in the claims, the article “a” before a noun is open-ended and understood to refer to “at least one” of those nouns or “one or more” of those nouns. Thus, the terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. For example, if a claim recites “acomponent” that performs one or more functions, each of the individual functions may be performed by a single component or by any combination of multiple components. Thus, the term “acomponent” having characteristics or performing functions may refer to “at least one of one or more components” having a particular characteristic or performing a particular function. Subsequent reference to a component introduced with the article “a” using the terms “the” or “said” may refer to any or all of the one or more components. For example, a component introduced with the article “a” may be understood to mean “one or more components, ” and referring to “the component” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ” Similarly, subsequent reference to a component introduced as “one or more components” using the terms “the” or “said” may refer to any or all of the one or more components. For example, referring to “the one or more components” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ”
[0220] The term “determine” or “determining” or “identify” or “identifying” encompasses a variety of actions and, therefore, “determining” or “identifying” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” or “identifying” can include receiving (such as receiving information or signaling, e.g., receiving information or signaling for determining, receiving information or signaling for identifying) , accessing (such as accessing data in a memory, or accessing information) and the like. Also, “determining” or “identifying” can include resolving, obtaining, selecting, choosing, establishing and other such similar actions.
[0221] In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label or other subsequent reference label.
[0222] The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration” and not “preferred” or “advantageous over other examples. ” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some figures, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.
[0223] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A user equipment (UE) , comprising:one or more memories storing processor-executable code; andone or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:receive low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, wherein the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal;receive, while operating in a first power state, the low-power wake-up signal, wherein the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and wherein the second power state is associated with higher power consumption than the first power state; andmonitor, while operating in the second power state, for the downlink transmission based at least in part on a first quasi-co-location source that is selected from the set of available quasi-co-location sources in accordance with the low-power wake-up configuration information.2.The UE of claim 1, wherein the first quasi-co-location source is selected from a latest one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal, that is received at the UE.3.The UE of claim 1, wherein the low-power wake-up configuration information further indicates a type of quasi-co-location associated with each quasi-co-location source of the set of available quasi-co-location sources.4.The UE of claim 1, wherein, to receive the low-power wake-up configuration information, the one or more processors are individually or collectively operable to execute the code to cause the UE to:receive radio resource control signaling, a medium access control (MAC) control element, or any combination thereof, that provides a transmission configuration indicator (TCI) state associated with the downlink transmission and that indicates which of the low-power synchronization signal, the low-power wake-up signal, the synchronization signal block, or the channel state information reference signal, are available for selection as the first quasi-co-location source.5.The UE of claim 1, wherein:the first quasi-co-location source is specified to be selected from the quasi-co-location source of one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal, andthe low-power wake-up configuration information indicates that a most recent one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal that is received at the UE is to be selected as the first quasi-co-location source.6.The UE of claim 1, wherein the UE selects the first quasi-co-location source from the set of available quasi-co-location sources based at least in part on which quasi-co-location source of the set of available quasi-co-location sources is most likely to provide a successful reception of the downlink transmission.7.The UE of claim 1, wherein the low-power wake-up configuration information indicates a default quasi-co-location source for the downlink transmission, and the first quasi-co-location source is set to the default quasi-co-location source or a different quasi-co-location source that is indicated to the UE subsequent to the low-power wake-up configuration information, and wherein the different quasi-co-location source is indicated in radio resource control signaling, in a medium access control (MAC) control element, or downlink control information.8.The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:transmit, to a network entity, an indication of a preferred quasi-co-location source for the downlink transmission that indicates one of the set of available quasi-co-location sources.9.The UE of claim 1, wherein the downlink transmission is a dynamically scheduled downlink transmission, or is a downlink shared channel transmission in accordance with a semi-persistent scheduling configuration.10.The UE of claim 1, wherein:the low-power synchronization signal and the low-power wake-up signal use a unified transmission configuration indicator (TCI) state with one of the synchronization signal block or the channel state information reference signal, orthe low-power synchronization signal and the low-power wake-up signal use a TCI state that is independent of a TCI state of the synchronization signal block and the channel state information reference signal.11.A method for wireless communications at a user equipment (UE) , comprising:receiving low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, wherein the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal;receiving, while operating in a first power state, the low-power wake-up signal, wherein the low-power wake-up signal indicates the UE is to transition to a second power state and monitor for the downlink transmission, and wherein the second power state is associated with higher power consumption than the first power state; andmonitoring, while operating in the second power state, for the downlink transmission based at least in part on a first quasi-co-location source that is selected from the set of available quasi-co-location sources in accordance with the low-power wake-up configuration information.12.The method of claim 11, wherein the first quasi-co-location source is selected from a latest one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal, that is received at the UE.13.The method of claim 11, wherein the low-power wake-up configuration information further indicates a type of quasi-co-location associated with each quasi-co-location source of the set of available quasi-co-location sources.14.The method of claim 11, wherein receiving the low-power wake-up configuration information comprises:receiving radio resource control signaling, a medium access control (MAC) control element, or any combination thereof, that provides a transmission configuration indicator (TCI) state associated with the downlink transmission and that indicates which of the low-power synchronization signal, the low-power wake-up signal, the synchronization signal block, or the channel state information reference signal, are available for selection as the first quasi-co-location source.15.The method of claim 11, wherein:the first quasi-co-location source is specified to be selected from the quasi-co-location source of one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal, andthe low-power wake-up configuration information indicates that a most recent one of the low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal that is received at the UE is to be selected as the first quasi-co-location source.16.The method of claim 11, wherein the UE selects the first quasi-co-location source from the set of available quasi-co-location sources based at least in part on which quasi-co-location source of the set of available quasi-co-location sources is most likely to provide a successful reception of the downlink transmission.17.The method of claim 11, wherein the low-power wake-up configuration information indicates a default quasi-co-location source for the downlink transmission, and the first quasi-co-location source is set to the default quasi-co-location source or a different quasi-co-location source that is indicated to the UE subsequent to the low-power wake-up configuration information, and wherein the different quasi-co-location source is indicated in radio resource control signaling, in a medium access control (MAC) control element, or downlink control information.18.The method of claim 11, further comprising:transmitting, to a network entity, an indication of a preferred quasi-co-location source for the downlink transmission that indicates one of the set of available quasi-co-location sources.19.A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by at least one processor to:receive low-power wake-up configuration information that indicates a quasi-co-location source of a downlink transmission that is to be monitored upon reception of a low-power wake-up signal, wherein the quasi-co-location source is configured to be selected from a set of available quasi-co-location sources that includes a quasi-co-location source of a low-power synchronization signal, a quasi-co-location source of the low-power wake-up signal, a quasi-co-location source of a synchronization signal block, and a quasi-co-location source of a channel state information reference signal;receive, while operating in a first power state, the low-power wake-up signal, wherein the low-power wake-up signal indicates to transition to a second power state and monitor for the downlink transmission, and wherein the second power state is associated with higher power consumption than the first power state; andmonitor, while operating in the second power state, for the downlink transmission based at least in part on a first quasi-co-location source that is selected from the set of available quasi-co-location sources in accordance with the low-power wake-up configuration information.20.The non-transitory computer-readable medium of claim 19, wherein the first quasi-co-location source is selected from a latest one of a received low-power synchronization signal, low-power wake-up signal, synchronization signal block, or channel state information reference signal.