Uplink and downlink beam reporting

Abstract

Methods, systems, and devices for wireless communication are described. A user equipment (UE) is capable of receiving and measuring a channel state information (CSI) reference signal (CSI-RS) transmitted by a network entity. The UE can separately select and report a downlink beam and an uplink beam based on the measurement of the CSI-RS. In the case where the optimal uplink beam is different from the optimal downlink beam, it is possible to increase throughput by separately selecting and reporting the downlink beam and the uplink beam. Additionally, the UE can select an uplink beam on which the UE does not limit the transmit power due to the maximum possible exposure (MPE). The network entity can indicate to the UE whether to select and report downlink and uplink beams separately or jointly, for example via Radio Resource Control (RRC) signaling.

Description

Technical Field

[0001] The following pertains to wireless communications, including uplink and downlink beam reporting. Background Art

[0002] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (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 techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations, each of which supports wireless communications for communication devices, which may be referred to as user equipment (UE). Summary of the invention

[0003] The described technology relates to improved methods, systems, devices and apparatuses that support uplink and downlink beam reporting. For example, the described technology provides for separately selecting and reporting downlink beams and uplink beams based on channel state information (CSI) reference signals (CSI-RS). A user equipment (UE) can receive and measure the CSI-RS sent by a network entity. The UE can separately select and report downlink beams and uplink beams based on the measurement of the CSI-RS. In the case where the best uplink beam is different from the best downlink beam, separately selecting and reporting downlink beams and uplink beams can increase throughput. Additionally, the UE can select an uplink beam on which the UE is not limited in transmit power due to maximum possible exposure (MPE). The network entity can indicate to the UE, for example via radio resource control (RRC) signaling, whether to select and report downlink beams and uplink beams separately or jointly.

[0004] A method for wireless communication at a UE is described. The method may include: receiving control signaling from a network entity indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection; receiving a set of CSI-RS via the set of multiple beams; and sending a beam report to the network entity identifying a selected uplink beam from the set of multiple beams and a selected downlink beam from the set of multiple beams based on the received set of CSI-RS and the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0005] An apparatus for wireless communication is described. The apparatus may include: a memory; a transceiver; and at least one processor of a UE, the at least one processor being coupled to the memory and the transceiver. The at least one processor may be configured to: receive control signaling from a network entity indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection; receive a set of CSI-RS via the set of multiple beams; and send a beam report identifying a selected uplink beam from the set of multiple beams and a selected downlink beam from the set of multiple beams to the network entity based on the received set of CSI-RS and the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0006] Another apparatus for wireless communication at a UE is described. The apparatus may include: a component for receiving control signaling from a network entity indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection; a component for receiving a set of CSI-RS via the set of multiple beams; and a component for sending a beam report identifying a selected uplink beam from the set of multiple beams, a selected downlink beam from the set of multiple beams, and a selected downlink beam from the set of multiple beams to the network entity based on the received set of CSI-RS and the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0007] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to perform the following operations: receiving control signaling from a network entity indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection; receiving a set of CSI-RS via the set of multiple beams; and based on the received set of CSI-RS and the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection, sending a beam report to the network entity identifying a selected uplink beam from the set of multiple beams and a selected downlink beam from the set of multiple beams.

[0008] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following operations: sending a capability indication to a network entity for reporting uplink beam selection to the UE, wherein receiving control signaling can be based on the indication of the capability.

[0009] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending an indication of capability may include operations, features, components, or instructions for performing the following operations: sending an indication of a first number of uplink beam reports and a second number of downlink beam reports supported by the UE.

[0010] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following operations: sending a request to a network entity to report uplink beam selection, wherein receiving control signaling may be at least partially responsive to the request.

[0011] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for identifying an MPE constraint associated with the selected uplink beam, wherein sending the request may be based on identifying the MPE constraint.

[0012] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining, based on a previous set of CSI-RS, a request to report downlink beam selection separately from uplink beam selection.

[0013] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following operations: sending a request to report joint downlink and uplink beam selection to a network entity and based on a CSI-RS set; and receiving second control signaling from the network entity and at least partially in response to the request indicating that the UE may want to report joint downlink and uplink beam selection.

[0014] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first channel state information processing unit occupancy associated with a joint downlink and uplink beam selection may be equal to a total channel state information processing unit occupancy associated with an uplink beam selection and a downlink beam selection.

[0015] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first channel state information processing unit occupancy associated with joint downlink and uplink beam selection can be equal to half of a total channel state information processing unit occupancy associated with uplink beam selection and downlink beam selection.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first channel state information processing unit occupancy associated with joint downlink and uplink beam selection can be equal to a second channel state information processing unit occupancy associated with uplink beam selection.

[0017] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first number of symbols associated with joint downlink and uplink beam selection may be equal to a total number of symbols associated with uplink beam selection and downlink beam selection.

[0018] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the beam report includes a layer 1 beam report.

[0019] A method for wireless communication at a network entity is described. The method may include: sending control signaling to a UE indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection; sending a set of CSI-RS via the set of multiple beams; and receiving a beam report from the UE identifying a selected uplink beam from the set of multiple beams and a selected downlink beam from the set of multiple beams in response, at least in part, to the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0020] An apparatus for wireless communication is described. The apparatus may include: a memory; a transceiver; and at least one processor of a network entity, the at least one processor being coupled to the memory and the transceiver. The at least one processor may be configured to: send control signaling to a UE indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection; send a set of CSI-RS via the set of multiple beams; and receive a beam report from the UE identifying a selected uplink beam from the set of multiple beams and a selected downlink beam from the set of multiple beams in response, at least in part, to the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0021] Another apparatus for wireless communication at a network entity is described. The apparatus may include: a component for sending control signaling to a UE indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection; a component for sending a set of CSI-RS via the set of multiple beams; and a component for receiving a beam report from the UE identifying a selected uplink beam from the set of multiple beams and a selected downlink beam from the set of multiple beams in response, at least in part, to the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0022] A non-transitory computer-readable medium storing code for wireless communication at a network entity is described. The code may include instructions executable by a processor to perform the following operations: send control signaling to a UE indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection; send a set of CSI-RS via the set of multiple beams; and receive a beam report from the UE identifying a selected uplink beam from the set of multiple beams and a selected downlink beam from the set of multiple beams in response, at least in part, to the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0023] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following operations: receiving an indication of a capability of the UE to report uplink beam selection to the UE, wherein sending control signaling may be based on the indication of the capability.

[0024] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving an indication of capabilities may include operations, features, components, or instructions for performing the following operations: receiving an indication of a first number of uplink beam reports and a second number of downlink beam reports supported by the UE.

[0025] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following operations: receiving a request to report uplink beam selection from a UE, wherein receiving control signaling may be at least partially responsive to the request.

[0026] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following operations: receiving a request to report joint downlink and uplink beam selection from a UE; and sending second control signaling to the UE and at least partially in response to the request indicating that the UE may want to report the joint downlink and uplink beam selection.

[0027] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first channel state information processing unit occupancy associated with a joint downlink and uplink beam selection may be equal to a total channel state information processing unit occupancy associated with an uplink beam selection and a downlink beam selection.

[0028] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first channel state information processing unit occupancy associated with joint downlink and uplink beam selection can be equal to half of a total channel state information processing unit occupancy associated with uplink beam selection and downlink beam selection.

[0029] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first channel state information processing unit occupancy associated with joint downlink and uplink beam selection can be equal to a second channel state information processing unit occupancy associated with uplink beam selection.

[0030] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a first number of symbols associated with joint downlink and uplink beam selection may be equal to a total number of symbols associated with uplink beam selection and downlink beam selection.

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the beam report includes a layer 1 beam report. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 An example of a wireless communication system supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is illustrated.

[0033] Figure 2 An example of a wireless communication system supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is illustrated.

[0034] Figure 3 An example of a process flow for supporting uplink and downlink beam reporting in accordance with one or more aspects of the present disclosure is illustrated.

[0035] Figure 4 and Figure 5 A block diagram of a device supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown.

[0036] Figure 6 A block diagram of a communications manager supporting uplink and downlink beam reporting in accordance with one or more aspects of the present disclosure is shown.

[0037] Figure 7 A diagram of a system including a device supporting uplink and downlink beam reporting is shown in accordance with one or more aspects of the present disclosure.

[0038] Figure 8 and Fig. 9 A block diagram of a device supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown.

[0039] Fig.10 A block diagram of a communications manager supporting uplink and downlink beam reporting in accordance with one or more aspects of the present disclosure is shown.

[0040] Fig.11 A diagram of a system including a device supporting uplink and downlink beam reporting is shown in accordance with one or more aspects of the present disclosure.

[0041] Figures 12 to 15 A flow chart illustrating a method of supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0042] In some wireless communication systems, a user equipment (UE) may select a downlink beam for communicating with a network entity based on measurements of a channel state information (CSI) reference signal (CSI-RS) sent by a network entity. For example, these measurements may be reference signal received power (RSRP) measurements, and the UE may select a downlink beam based on the CSI-RS with the best RSRP measurement. The UE may report the selected downlink beam to the network entity. In some examples, the network entity may configure the UE to send a sounding reference signal (SRS), and the network entity may select an uplink beam based on measurements of the SRS and configure the UE to use the selected uplink beam. However, in some cases, a limited number of SRSs may be configured, and an uplink beam may be selected instead based on channel reciprocity with the selected downlink beam. Therefore, in some examples, the network entity and the UE may use the reported downlink beam for both uplink and downlink communications. In some cases, channel reciprocity may not be ideal, however, and the best beam for uplink communication may be different from the best beam for downlink communication. Additionally, if the UE is aware that humans are located in a certain direction, some UEs may limit the uplink transmit power in that direction to limit the maximum possible exposure (MPE) of RF radiation to humans. Thus, in a direction where there is no MPE problem, the UE may limit the transmit power on one uplink beam, but may not limit the uplink power on another beam.

[0043] Various aspects of the present disclosure relate to separately selecting and reporting downlink beams and uplink beams based on CSI-RS. The UE may receive and measure the CSI-RS. The UE may separately select and report the downlink beam and the uplink beam based on the measurement of the CSI-RS. In the case where the best uplink beam is different from the best downlink beam, separately selecting and reporting the downlink beam and the uplink beam may increase throughput. Additionally, the UE may select an uplink beam on which the UE is not limited in transmit power due to MPE reasons. A network entity may indicate to the UE, for example via radio resource control (RRC) signaling, whether to select and report the downlink beam and the uplink beam separately or jointly. In some cases, the UE may indicate the UE's ability to report the selected uplink beam separately from the selected downlink beam based on the CSI-RS. In some cases, the UE may request that the selected uplink beam be reported separately from the selected downlink beam, for example based on an identified MPE constraint or based on a measurement of the CSI-RS indicating that the best uplink beam is different from the best downlink beam.

[0044] Aspects of the present disclosure are first described in the context of a wireless communication system. Aspects of the present disclosure are further illustrated and described by and with reference to process flows, apparatus diagrams, system diagrams, and flow diagrams related to uplink and downlink beam reporting.

[0045] Figure 1 An example of a wireless communication system 100 supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating according to other systems and radio technologies including future systems and radio technologies not explicitly mentioned herein.

[0046] The network entities 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may include devices in different forms or with different capabilities. In various examples, the network entities 105 may be referred to as network elements, mobility elements, radio access network (RAN) nodes, or network equipment, among other nomenclature. In some examples, the network entities 105 and the UE 115 may communicate wirelessly via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, the network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) within which the UE 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area within which the network entity 105 and the UE 115 may support signal communications according to one or more radio access technologies (RATs).

[0047] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be devices in different forms or with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communication with various types of devices, such as Figure 1 Communicate with other UEs 115 or network entities 105) as shown.

[0048] As described herein, a node of the wireless communication 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, the node may be a UE 115. As another example, the 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 other aspects of this example, the first node, the second node, and the third node may be different relative to these examples. Similarly, references to UE 115, network entity 105, apparatus, device, computing system, etc. may include disclosure of UE 115, network entity 105, apparatus, device, computing system, etc. as nodes. For example, a disclosure that UE 115 is configured to receive information from network entity 105 also discloses that the first node is configured to receive information from a second node.

[0049] In some examples, the network entities 105 may communicate with the core network 130, or with each other, or both. For example, the network entities 105 may communicate with the core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, the network entities 105 may communicate with each other directly (e.g., directly between the network entities 105) or indirectly (e.g., via the core network 130) via the backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols). In some examples, the network entities 105 may communicate with each other via midhaul communication links 162 (e.g., according to a midhaul interface protocol) or fronthaul communication links 168 (e.g., according to a fronthaul interface protocol) or any combination thereof. The backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., electrical links, optical fiber links), one or more wireless links (e.g., radio links, wireless optical links), etc. or various combinations thereof. UE 115 may communicate with core network 130 via communication link 155 .

[0050] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a transceiver base station, a radio base station, an NR base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a 5G NB, a next generation eNB (ng-eNB), a home Node B, a home evolved Node B, or other suitable terms). In some examples, the network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, stand-alone) base station architecture, which may be configured to utilize a protocol stack physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140).

[0051] In some examples, the network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that may be configured to utilize a protocol stack that is physically or logically distributed between two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN)). For example, the network entity 105 may include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (RIC) 175 (e.g., a near real-time RIC (near RT RIC), a non-real-time RIC (non-RT RIC)), a service management and orchestration (SMO) 180 system, or any combination thereof. The RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH), a remote radio unit (RRU), or a transmit receive point (TRP). One or more components of the network entity 105 in the decomposed RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 of the decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0052] The functional split between CU 160, DU 165, and 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, and any combination thereof) are performed at CU 160, DU 165, or RU 170. For example, a functional split of a protocol stack may be employed between CU 160 and DU 165 such that CU 160 may support one or more layers of a protocol stack and DU 165 may support one or more different layers of a protocol stack. In some examples, CU 160 may host higher protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functionality and signaling (e.g., radio resource control (RRC), service data adaptation protocol (SDAP), packet data convergence protocol (PDCP)). The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally or alternatively, a functional split of the protocol stack may be employed between the DU 165 and the 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 more different cells (e.g., via one or more RUs 170). In some cases, the functional split between CU 160 and DU 165 or between DU 165 and RU 170 can be within the protocol layer (e.g., some functions of the protocol layer can be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer are performed by different ones of CU 160, DU 165, or RU 170). CU 160 can be further functionally split into CU control plane (CU-CP) and CU user plane (CU-UP) functions. CU 160 can be connected to one or more DUs 165 via midhaul communication links 162 (e.g., F1, F1-c, F1-u), and DU 165 can be connected to one or more RUs 170 via fronthaul communication links 168 (e.g., open fronthaul (FH) interface). In some examples, midhaul communication link 162 or fronthaul communication link 168 may be implemented based on interfaces (eg, channels) between layers of a protocol stack supported by respective network entities 105 that communicate via those communication links.

[0053] In some wireless communication systems (e.g., wireless communication system 100), infrastructure and spectrum resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as donor entities or IAB donors. One or more DUs 165 or one or more RUs 170 may be controlled in part by one or more CUs 160 associated with a donor network entity 105 (e.g., donor base station 140). One or more donor network entities 105 (e.g., IAB donors) may communicate with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120). The IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by a coupled IAB donor's DU 165. The IAB-MT may include an independent set of antennas for relaying communications with the UE 115, or may share the same antennas of the IAB node 104 (e.g., of the RU 170) for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the decomposed RAN architecture (e.g., one or more IAB nodes 104 or components of the IAB node 104) may be configured to operate according to the techniques described herein.

[0054] For example, an access network (AN) or RAN may include an access node (e.g., an IAB donor), communications between an IAB node 104, and one or more UEs 115. The IAB donor may facilitate connectivity between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130). That is, the IAB donor may refer to a RAN node having a wired or wireless connection to the core network 130. The IAB donor may include a CU 160 and at least one DU 165 (e.g., and RU 170), in which case the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link). The IAB donor and the IAB node 104 may communicate via an F1 interface according to a protocol defining signaling messages (e.g., an F1 AP protocol). Additionally or alternatively, CU 160 may communicate with the core network via an interface (which may be an example of a portion of a backhaul link) and may communicate with other CUs 160 (e.g., CUs 160 associated with alternative IAB donors) via an Xn-C interface (which may be an example of a portion of a backhaul link).

[0055] The IAB node 104 may refer to a RAN node that provides IAB functions (e.g., access for UE 115, wireless self-backhaul capabilities, etc.). The DU 165 may act as a distributed scheduling node toward a child node associated with the IAB node 104, and the IAB-MT may act as a scheduled node toward a parent node associated with the IAB node 104. That is, the IAB donor may be referred to as a parent node that communicates with one or more child nodes (e.g., the IAB donor may relay the UE's transmission through one or more other IAB nodes 104). Additionally or alternatively, the IAB node 104 may also be referred to as a parent node or child node of other IAB nodes 104, depending on the relay chain or configuration of the AN. Therefore, the IAB-MT entity of the IAB node 104 may provide a Uu interface for the child IAB node 104 to receive signaling from the parent IAB node 104, and the DU interface (e.g., DU 165) may provide a Uu interface for the parent IAB node 104 to signal to the child IAB node 104 or the UE 115.

[0056] For example, the IAB node 104 may be referred to as a parent node supporting communications for a child IAB node or as a child IAB node associated with an IAB donor, or both. The IAB donor may include a CU 160 having a wired or wireless connection (e.g., backhaul communication link 120) to the core network 130, and may act as a parent node of the IAB node 104. For example, the DU 165 of the IAB donor may relay the transmission to the UE 115 through the IAB node 104, or may directly signal the transmission to the UE 115, or both. The CU 160 of the IAB donor may signal the IAB node 104 via the F1 interface that the communication link is established, and the IAB node 104 may schedule the transmission (e.g., the transmission relayed from the IAB donor to the UE 115) through the DU 165. That is, data may be relayed to and from the IAB node 104 via the NR Uu interface of the MT to the IAB node 104 via signaling. Communications with the IAB node 104 may be scheduled by the DU 165 of the IAB donor, and communications with the IAB node 104 may be scheduled by the DU 165 of the IAB node 104 .

[0057] Where the techniques described herein are applied to the context of a decomposed RAN architecture, one or more components of the decomposed RAN architecture may be configured to support uplink and downlink beam reporting 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 decomposed RAN architecture (e.g., an IAB node 104, a DU 165, a CU 160, a RU 170, a RIC 175, a SMO 180).

[0058] 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 term, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or may be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects such as appliances or vehicles, meters, etc.

[0059] The UE 115 described herein may be capable of communicating with various types of devices such as other UEs 115 which may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc. Figure 1 shown.

[0060] The UE 115 and the network entity 105 may wirelessly communicate with each other via one or more communication links 125 (e.g., access links) using resources associated with one or more carriers. The term "carrier" may refer to a collection of RF spectrum resources having a physical layer structure defined for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of an RF spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communications with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between these devices and any portion (e.g., entity, sub-entity) of the network entity 105. For example, the terms "send," "receive," or "communicate" when referring to the network entity 105 may refer to any portion of a network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105).

[0061] In some examples, such as in a carrier aggregation configuration, a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute RF Channel Number (EARFCN)) and may be identified based on a channel raster for discovery by UE 115. A carrier may operate in a standalone mode, in which case initial acquisition and connection may be made by UE 115 via the carrier, or a carrier may operate in a non-standalone mode, in which case a different carrier (e.g., of the same or different radio access technology) is used to anchor the connection.

[0062] The communication link 125 shown in the wireless communication system 100 may include downlink transmissions (e.g., forward link transmissions) from the network entity 105 to the UE 115, uplink transmissions (e.g., return link transmissions) from the UE 115 to the network entity 105, or both, as well as other transmission configurations. A carrier may carry downlink communications or uplink communications (e.g., in FDD mode), or may be configured to carry downlink communications and uplink communications (e.g., in TDD mode).

[0063] A carrier may be associated with a particular bandwidth of the RF spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a set of bandwidths of carriers of a particular radio access technology (e.g., 1.4 megahertz (MHz), 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, 40 MHz, or 80 MHz). A device of the wireless communication system 100 (e.g., a network entity 105, a UE 115, or both) may have a hardware configuration that supports communications using a particular carrier bandwidth, or may be capable of being configured to support communications using one of the carrier bandwidths in the set of carrier bandwidths. In some examples, the wireless communication system 100 may include a network entity 105 or a UE 115 that supports concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate using a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0064] The signal waveform transmitted via the carrier may include 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 using MCM techniques, a resource element may refer to a resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, in which case the symbol period and the subcarrier spacing may be inversely related. The number 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), so that a relatively high number of resource elements (e.g., in the transmission duration) and a relatively high order modulation scheme may correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of RF spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial resources may increase the data rate or data integrity used for communication with UE 115.

[0065] One or more parameter sets for a carrier may be supported, and the parameter sets may include subcarrier spacing (Δf) and cyclic prefixes. A carrier may be divided into one or more BWPs with the same or different parameter sets. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications of a UE 115 may be constrained to one or more active BWPs.

[0066] The time interval for the network entity 105 or the UE 115 may be expressed in multiples of a basic time unit, which may be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, where Δf max It can represent the supported subcarrier spacing, and N f The supported discrete Fourier transform (DFT) size may be indicated. The time intervals of the communication resources 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).

[0067] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, the frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a certain number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a certain number of symbol periods (e.g., depending on the length of the cyclic prefix appended in front of each symbol period). In some wireless communication systems 100, the time slot may be further divided into a plurality of micro time slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0068] A subframe, a time slot, a mini-time slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0069] Physical channels may be multiplexed according to various techniques in order to communicate using a carrier. For example, physical control channels and physical data channels may be multiplexed using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique to signal via a downlink carrier. A control region (e.g., a control resource set (CORESET)) of a physical control channel may be defined by a set of symbol periods and may extend across a system bandwidth of a carrier or a subset of that system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more UEs in UE 115 may monitor or search a control region to obtain control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of a control channel candidate may refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 , and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0070] The network entity 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with the network entity 105 (e.g., using a carrier), and may be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other identifier) ​​used to distinguish adjacent cells. In some examples, a cell may also refer to a coverage area 110 or a portion of a coverage area 110 (e.g., a sector) on which the logical communication entity operates. Depending on various factors such as the capabilities of the network entity 105, such cells may range from smaller areas (e.g., structures, subsets of structures) to larger areas. For example, a cell may be or may include a building, a subset of a building, or an external space between or overlapping coverage areas 110, and the like.

[0071] A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to UEs 115 that have a service subscription with a network provider that supports the macro cell. A small cell may be associated with a lower power network entity 105 (e.g., a lower power base station 140) (compared to a macro cell), and the small cell may operate using the same or different (e.g., licensed, unlicensed) frequency band as the macro cell. A small cell may provide unrestricted access to a UE 115 that has a service subscription with a network provider, or may provide restricted access to a UE 115 associated with a small cell (e.g., a UE 115 in a closed subscriber group (CSG), a UE 115 associated with a user in a home or office). A network entity 105 may support one or more cells, and may also use one or more component carriers to support communications via one or more cells.

[0072] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

[0073] In some examples, the network entities 105 (e.g., base stations 140, RUs 170) may be mobile and thus provide communication coverage for mobile coverage areas 110. In some examples, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other examples, overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.

[0074] The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the network entities 105 (e.g., base stations 140) may have similar frame timing, and transmissions from different network entities 105 may be approximately aligned in time. For asynchronous operation, the network entities 105 may have different frame timing, and in some examples, transmissions from different network entities 105 may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0075] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may allow automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a network entity 105 (e.g., base station 140) without human intervention. In some examples, M2M communication or MTC may include communication from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application that uses the information or presents the information to a person interacting with the application. Some UEs 115 may be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, health care monitoring, field survival monitoring, weather and geographic event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0076] Some UEs 115 may be configured to employ an operating mode that reduces power consumption, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but does not transmit and receive concurrently). In some examples, half-duplex communication may be performed with a reduced peak rate. Other energy-saving techniques for UEs 115 include entering a power-saving deep sleep mode when not engaged in active communications, operating using limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a subcarrier or resource block (RB) set) within a carrier, within a guard band of a carrier, or outside a carrier.

[0077] The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). UE 115 may be designed to support ultra-reliable or low-latency or critical functions. Ultra-reliable communication 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.

[0078] In some examples, the UE 115 may be configured to support communication directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 in a group that are performing D2D communication may be within a coverage area 110 of a network entity 105 (e.g., a base station 140, a RU 170), which may support aspects of such D2D communication configured (e.g., scheduled) by the network entity 105. In some examples, one or more UEs 115 in such a group may be outside of the coverage area 110 of the network entity 105, or may otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system, in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, network entity 105 may facilitate scheduling of resources for D2D communications. In some other examples, D2D communications may be performed between UEs 115 without involving network entity 105.

[0079] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units) using vehicle-to-network (V2N) communications, or communicate with the network via one or more network nodes (e.g., network entity 105, base station 140, RU 170), or both.

[0080] 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 a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by a network entity 105 (e.g., a base station 140) associated with the core network 130. User IP packets may be delivered through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the IP service 150 of one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0081] The wireless communication system 100 may operate using one or more frequency bands that may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally speaking, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelength ranges from about 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 these waves may be sufficient to penetrate structures so that macro cells provide services to UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) than communications using the lower frequencies and longer wavelengths of the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0082] The wireless communication system 100 may also operate using a super high frequency (SHF) region, which may be in the range of 3 GHz to 30 GHz (also known as a centimeter band), or an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also known as a millimeter band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between a UE 115 and a network entity 105 (e.g., a base station 140, a RU 170), and the EHF antennas of the corresponding devices may be smaller and closer together than UHF antennas. In some examples, such techniques may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be affected by even greater attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the use of frequency bands specified across these frequency regions may vary by country or regulatory agency.

[0083] The wireless communication system 100 may utilize licensed and unlicensed RF spectrum bands. For example, the wireless communication system 100 may use unlicensed bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band) to employ license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology. When operating using unlicensed RF spectrum bands, devices such as network entity 105 and UE 115 may employ carrier sensing for conflict detection and avoidance. In some examples, operations performed using unlicensed bands may be based on carrier aggregation configuration (e.g., LAA) in conjunction with component carriers operating using licensed bands. Operations performed using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others.

[0084] The network entity 105 (e.g., base station 140, RU 170) or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of the network entity 105 or UE 115 may be located in one or more antenna arrays or antenna panels, which can 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 the network entity 105 may be located at different geographical locations. The network entity 105 may include an antenna array having a collection of multiple rows and columns of antenna ports that the network entity 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may include one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming for signals sent via the antenna ports.

[0085] The network entity 105 or UE 115 may use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such a technology may be referred to as spatial multiplexing. The multiple signals may be sent, for example, by a transmitting device via different antennas or different combinations of antennas. Similarly, the multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technologies include: single-user MIMO (SU-MIMO), for which multiple spatial layers are sent to the same receiving device; and multi-user MIMO (MU-MIMO), for which multiple spatial layers are sent to multiple devices.

[0086] 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 direct 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 signals conveyed via antenna elements of an antenna array so that some signals propagating in a particular direction relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals conveyed via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of these antenna elements may be defined by a set of beamforming weights associated with a particular direction (e.g., relative to the antenna array of the transmitting device or the receiving device or relative to some other direction).

[0087] The network entity 105 or UE 115 may use beam scanning techniques as part of a beamforming operation. For example, the network entity 105 (e.g., base station 140, RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the network entity 105 along different directions. For example, the network entity 105 may send signals according to different sets of beamforming weights associated with different transmission directions. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device (such as network entity 105), or by a receiving device (such as UE 115)) beam directions for later transmission or reception by the network entity 105.

[0088] Some signals, such as data signals associated with a particular receiving device, may be sent by a transmitting device (e.g., transmitting network entity 105, transmitting UE 115) along a single beam direction (e.g., a direction associated with a receiving device (such as receiving network entity 105 or receiving UE 115)). In some examples, the beam direction associated with the transmission along the single beam direction may be determined based on signals sent along one or more beam directions. For example, UE 115 may receive one or more of the signals sent by network entity 105 along different directions, and may report to network entity 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0089] In some examples, transmission by a device (e.g., by network entity 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from network entity 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more subbands. Network entity 105 may send a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may or may not be precoded. UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel codebook, a linear combination codebook, a port selection codebook). Although these techniques are described with reference to signals sent along one or more directions by a network entity 105 (e.g., base station 140, RU 170), UE 115 may use similar techniques to send signals multiple times along different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115), or to send signals along a single direction (e.g., to send data to a receiving device).

[0090] A receiving device (e.g., UE 115) may perform receiving operations according to multiple receiving configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a receiving device (e.g., network entity 105). For example, the receiving device may perform reception according to multiple receiving directions by: receiving via different antenna subarrays, processing the received signals according to different antenna subarrays, receiving according to different receiving beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or processing the received signals according to different receiving beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0091] The wireless communication 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. The RLC layer may perform packet segmentation and reassembly to communicate via logical channels. The MAC layer may perform priority processing and multiplexing of logical channels into transport channels. The MAC layer may also implement error detection techniques, error correction techniques, or both to support retransmission to improve link efficiency. In the control plane, the RRC layer may provide the establishment, configuration, and maintenance of an RRC connection that supports a radio bearer for user plane data between the UE 115 and the network entity 105 or the core network 130. The PHY layer may map a transport channel to a physical channel.

[0092] UE 115 and network entity 105 may support retransmission of data to increase the likelihood of data being successfully received. Hybrid automatic repeat request (HARQ) feedback is a technique for increasing the likelihood of correctly receiving data via a communication link (e.g., communication link 125, D2D communication link 135). HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific time slot for data received via a previous symbol in the time slot. In some other examples, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0093] UE 115 may select a downlink beam for communicating with network entity 105 based on measurements of CSI-RS sent by network entity 105. For example, these measurements may be RSRP measurements, and UE 115 may select a downlink beam based on the CSI-RS with the best RSRP measurement. UE 115 may report the selected downlink beam to network entity 105. In some examples, network entity 105 may configure UE 115 to send SRS, and network entity 105 may select an uplink beam based on measurements of the SRS and configure UE 115 to use the selected uplink beam. However, in some cases, a limited number of SRS may be configured, and an uplink beam may be selected instead based on channel reciprocity with the selected downlink beam. Thus, in some examples, network entity 105 and UE 115 may use the reported downlink beam for both uplink and downlink communications. In some cases, channel reciprocity may not be ideal, however, and the best beam for uplink communications may be different from the best beam for downlink communications. Additionally, if the UE 115 is aware that humans are located in a certain direction, some UEs 115 may limit the uplink transmit power in that direction to limit the MPE of RF radiation to humans. In directions where there is no MPE problem, the UE 115 may limit the transmit power on one uplink beam, but may not limit the uplink transmit power on another beam.

[0094] The UE 115 may be configured to separately select and report downlink beams and uplink beams based on the CSI-RS. The UE 115 may receive and measure the CSI-RS from the network entity 105. The UE 115 may separately select and report downlink beams and uplink beams based on the measurement of the CSI-RS. In the case where the best uplink beam is different from the best downlink beam, separately selecting and reporting downlink beams and uplink beams may increase throughput. Additionally, the UE 115 may select an uplink beam on which the UE 115 is not limited in transmit power due to MPE reasons. The network entity 105 may indicate to the UE 115, for example via RRC signaling, whether to select and report downlink beams and uplink beams separately or jointly. For example, jointly reporting a downlink beam and an uplink beam may involve reporting a downlink beam and not reporting an uplink beam, and using the reported downlink beam for both the downlink and the uplink (e.g., based on channel reciprocity). In some cases, the UE 115 may indicate the ability of the UE 115 to report the selected uplink beam separately from the selected downlink beam based on the CSI-RS. The network entity 105 may send control signaling (e.g., RRC signaling) to configure the UE 115 to report the selected uplink beam separately from the selected downlink beam in response to the indicated ability of the UE 115 to report the selected uplink beam separately from the selected downlink beam. In some cases, the UE 115 may request to report the selected uplink beam separately from the selected downlink beam, for example, based on an identified MPE constraint or based on a measurement of a CSI-RS indicating that the best uplink beam is different from the best downlink beam.

[0095] Figure 2 An example of a wireless communication system 200 that supports uplink and downlink beam reporting according to one or more aspects of the present disclosure is illustrated. The wireless communication system 200 may implement one or more aspects of the wireless communication system 100. The wireless communication system 200 may include a UE 115-a, which may be an example of a UE 115 as described herein. The wireless communication system 200 may include a network entity 105-a, which may be an example of a network entity 105 as described herein.

[0096] UE 115-a may communicate with network entity 105-a using communication link 125-a, which may be an example of an NR or LTE link between UE 115-a and network entity 105-a. Communication link 125-a may include a bidirectional link that enables both uplink communication and downlink communication. For example, UE 115-a may use communication link 125-a to send uplink transmissions 205, such as uplink control signals or uplink data signals, to network entity 105-a, and network entity 105-a may use communication link 125-a to send downlink transmissions 210, such as downlink control signals or downlink data signals, to UE 115-a.

[0097] UE 115-a and network entity 105-a may implement beamforming techniques. For example, UE 115-a may send an uplink transmission 205 to network entity 105-a via an uplink beam (e.g., one of first uplink beam 220-a, second uplink beam 220-b, third uplink beam 220-c, fourth uplink beam 220-d, or fifth uplink beam 220-e), and network entity 105-a may send a downlink transmission 210 to UE 115-a via a downlink beam (e.g., one of first downlink beam 225-a, second downlink beam 225-b, third downlink beam 225-c, fourth downlink beam 225-d, or fifth downlink beam 225-e).

[0098] In some examples, the UE 115-a and the network entity 105-a can perform a beam selection process. In some examples, the beam selection process can be based on a downlink layer 1 metric. In some examples, the UE 115-a can select a downlink beam (e.g., one of the first downlink beam 225-a, the second downlink beam 225-b, the third downlink beam 225-c, the fourth downlink beam 225-d, or the fifth downlink beam 225-e) for communicating with the network entity 105 based on measurements of CSI-RS235 sent by the network entity 105-a via various downlink beams. For example, these measurements can be RSRP measurements, and the UE 115-a can select a downlink beam based on the CSI-RS with the best RSRP measurement. For example, the UE 115-a can select the third downlink beam 225-c, and can report the selection of the third downlink beam 225-c in the beam report 240. The network entity 105-a may use the selected and reported beam (e.g., the third downlink beam 225-c) to send the downlink transmission 210 to the UE 115-a. In some examples, the uplink beam (e.g., one of the first uplink beam 220-a, the second uplink beam 220-b, the third uplink beam 220-c, the fourth uplink beam 220-d, or the fifth uplink beam 220-e) may be selected based on channel reciprocity with the selected downlink beam. For example, the first uplink beam 220-a may correspond to the first downlink beam 225-a, the second uplink beam 220-b may correspond to the second downlink beam 225-b, the third uplink beam 220-c may correspond to the third downlink beam 225-c, the fourth uplink beam 220-d may correspond to the fourth downlink beam 225-d, and the fifth uplink beam 220-e may correspond to the fifth downlink beam 225-e. For example, the selection of the third downlink beam 225-c may result in the joint selection of the third uplink beam 220-c corresponding to the third downlink beam 225-c.

[0099] In some examples, for example, to improve throughput, downlink and uplink beam selection may be decoupled (e.g., with uplink and downlink throughput as a criterion). For example, in some scenarios, channel reciprocity may not be ideal, and the best beam for uplink transmission 205 may be different from the best beam for downlink transmission 210. For example, based on CSI-RS measurements, UE 115-a may determine that first uplink beam 220-a is the best uplink beam (e.g., and third uplink beam 220-c is the second-best uplink beam) even if third downlink beam 225-c is the best downlink beam (and first downlink beam 225-a is the second-best downlink beam). Therefore, if downlink and uplink beam selection are decoupled, throughput can be increased.

[0100] Additionally or alternatively, if UE 115-a is aware that a human is located in a given direction (e.g., on the third uplink beam 220-c), UE 115-a may limit the uplink transmit power in that direction to limit the MPE of RF radiation to the human. In directions where there is no MPE issue, UE 115-a may limit the transmit power on one uplink beam (e.g., on the third uplink beam 220-c), but may not limit the uplink power on another beam (e.g., the first uplink beam 220-a). Thus, in some cases, uplink performance may be improved by decoupling uplink and downlink beam selection.

[0101] The network entity 105-a may send control signaling 230 that configures the UE 115-a to select and report uplink beams and downlink beams separately. For example, the control signaling 230 may configure layer 1 beam reporting for downlink beam selection (e.g., joint selection, in which case the selected beam may be used for both downlink transmission 210 (based on channel reciprocity) and uplink transmission 205), only for uplink beam selection, or for both uplink beam selection and downlink beam selection. For example, the control signaling 230 may be RRC signaling, and the information element CSI-ReportConfig may include a flag indicating that the UE 115-a should report only downlink beam selection, only uplink beam selection, or both uplink beam selection and downlink beam selection.

[0102] The control signaling 230 may also indicate a beam set (e.g., a first downlink beam 225-a, a second downlink beam 225-b, a third downlink beam 225-c, a fourth downlink beam 225-d, or a fifth downlink beam 225-e). The network entity 105-a may send the CSI-RS via a downlink beam (e.g., via the first downlink beam 225-a, the second downlink beam 225-b, the third downlink beam 225-c, the fourth downlink beam 225-d, or the fifth downlink beam 225-e). The UE 115-a may perform measurements (e.g., RSRP measurements) on the CSI-RS and select an uplink beam and / or a downlink beam based on the control signaling (e.g., indicating selection of only an uplink beam, selection of only a downlink beam, or separate selection of a downlink beam and an uplink beam). UE 115 - a may send a beam report 240 indicating the selected beam based on control signaling 230 .

[0103] In some cases, the UE 115-a may send signaling 245 indicating the ability of the UE 115-a to select an uplink beam separately from the downlink beam based on the CSI-RS. For example, the signaling 245 may indicate whether the UE 115-a is capable of supporting beam reporting including only downlink beam selection, beam reporting including only separate uplink beam selection, or beam reporting including separate downlink beam selection and uplink beam selection. The network entity 105-a may send control signaling 230 instructing the UE 115-a to select and report an uplink beam separately based on the indicated capability of the UE 115-a.

[0104] In some examples, UE 115-a may send a request 250 to enable or disable separate uplink beam selection and reporting. For example, request 250 may be sent via a dedicated scheduling request, a MAC control element (MAC-CE), or UE assistance information. For example, if UE 115-a is configured to report only downlink beams (e.g., joint selection, in which case the selected beam can be used for downlink transmission 210 and uplink transmission 205), UE 115-a may determine that separate uplink beam selection and reporting may be beneficial based on past CSI-RS measurements or based on MPE conditions. Based on this determination, UE 115-a may send a request 250 to enable separate uplink beam reporting or to separately report beam reporting of uplink beam selection and downlink beam selection. Network entity 105-a may send control signaling 230 based on a request for request 250 to enable separate uplink beam reporting or to separately report beam reporting of uplink beam selection and downlink beam selection.

[0105] In some examples, for example, to save signaling overhead, UE 115-a may send a request 250 to report only downlink beam selection (e.g., joint selection, in which case the selected beam may be used for downlink transmission 210 and uplink transmission 205). For example, UE 115-a may determine that the same beam is optimal for both uplink and downlink, and to save signaling overhead, UE 115-a may request to send a selection of one (e.g., downlink) beam. In response, network entity 105-a may send second control signaling 255 (e.g., RRC) instructing UE 115-a to report only downlink beam selection (e.g., joint selection, in which case the selected beam may be used for downlink transmission 210 and uplink transmission 205).

[0106] In some examples, UE 115-a may count the number of CSI processing units (CPUs) in a beam report that separately indicates uplink beam selection and downlink beam selection to be equal to the number of CPUs used for a beam report that only indicates downlink beam selection (e.g., joint selection, in which case one selected beam may be used for downlink transmission 210 and uplink transmission 205). In some examples, UE 115-a may count the number of CPUs in a beam report that separately indicates uplink beam selection and downlink beam selection to be equal to the number of CPUs used for a beam report that only indicates downlink beam selection (e.g., joint selection, in which case one selected beam may be used for downlink transmission 210 and uplink transmission 205). In some examples, UE 115-a may count the number of CPUs in a beam report that only indicates uplink beam selection to be equal to the number of CPUs used for a beam report that only indicates downlink beam selection (e.g., joint selection, in which case one selected beam may be used for downlink transmission 210 and uplink transmission 205).

[0107] In some examples, UE 115-a may count the CSI processing time (e.g., the minimum number of symbols required for CSI processing such as Z3, Z3' defined in the 3GPP New Radio Technical Specification) in a beam report that separately indicates uplink beam selection and downlink beam selection or in a beam report that only indicates uplink beam selection to be equal to the number of CPUs used for a beam report that only indicates downlink beam selection (e.g., joint selection, in which case one selected beam may be used for downlink transmission 210 and uplink transmission 205). For example, UE 115-a may count the number of symbols in a beam report that separately indicates uplink beam selection and downlink beam selection or in a beam report that only indicates uplink beam selection to be equal to the number of symbols used for a beam report that only indicates downlink beam selection (e.g., joint selection, in which case one selected beam may be used for downlink transmission 210 and uplink transmission 205).

[0108] In some cases, UE 115-a may support a certain number of beam reports. When determining the number of supported beam reports for UE 115-a, the number of beam reports that separately indicate uplink beam selection and downlink beam selection, the number of beam reports that only indicate uplink beam selection, and the number of beam reports that only indicate downlink beam selection (e.g., joint selection, in which case one selected beam can be used for downlink transmission 210 and uplink transmission 205) may be jointly considered.

[0109] Figure 3 An example of a process flow 300 for supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is illustrated. The process flow 300 may include a UE 115-b, which may be an example of a UE 115 as described herein. The process flow 300 may include a network entity 105-b, which may be an example of a network entity 105 as described herein. In the following description of the process flow 300, operations between the network entity 105-b and the UE 115-b may be sent in an order different from the example order shown, or operations performed by the network entity 105-b and the UE 115-b may be performed in a different order or at a different time. Some operations may also be omitted from the process flow 300, and other operations may be added to the process flow 300.

[0110] At 305, the UE 115-b may receive control signaling from the network entity 105-b indicating a set of multiple beams and that the UE 115-b is to report uplink beam selection and downlink beam selection.

[0111] At 310, the UE 115-b may receive a set of CSI-RS from the network entity 105-b via a set of multiple beams.

[0112] In some examples, at 315, the UE may select an uplink beam from a set of multiple beams and select a downlink beam from a set of multiple beams based on the received CSI-RS set and control signaling indicating that UE 115-b is to report the uplink beam selection and the downlink beam selection.

[0113] At 320, UE 115-b may send a beam report identifying a selected uplink beam from a set of multiple beams and a selected downlink beam from a set of multiple beams to network entity 105-b based on the received CSI-RS set and control signaling indicating that UE 115-b is to report uplink beam selection and downlink beam selection.

[0114] In some cases, the UE 115-b may send an indication of the capability of the UE 115-b to report uplink beam selection to the network entity 105-b. At 305, the network entity 105-b may send control signaling based on the indication of the capability. In some cases, the UE 115-b may send an indication of a first number of uplink beam reports and a second number of downlink beam reports supported by the UE 115-b along with the indication of the capability of the UE 115-b to report uplink beam selection.

[0115] In some cases, UE 115-b may send a request to network entity 105-b to report uplink beam selection. At 305, network entity 105-b may send control signaling based on the request. In some cases, UE 115-b may identify an MPE constraint associated with the selected uplink beam, and UE 115-b may send the request based on identifying the MPE constraint. In some cases, UE 115-b may determine based on a previous set of CSI-RS to request to report downlink beam selection separately from uplink beam selection.

[0116] In some cases, the UE 115-b may send a request to the network entity 105-b to report joint downlink and uplink beam selection (e.g., only report downlink beam selection) based on the CSI-RS at 310. The UE 115-b may receive second control signaling indicating that the UE 115-b is to report joint downlink and uplink beam selection (e.g., only report downlink beam selection) in response to the request.

[0117] In some cases, the first CPU occupancy associated with the joint downlink and uplink beam selection is equal to the total CPU occupancy associated with the uplink beam selection and the downlink beam selection. For example, the first CPU occupancy refers to the number of CPUs in the beam report for indicating the downlink beam selection, and the second CPU occupancy refers to the number of CPUs in the beam report for separately indicating the uplink beam selection and the downlink beam selection.

[0118] In some cases, the first CPU occupancy associated with the joint downlink and uplink beam selection is equal to half of the total CPU occupancy associated with the uplink beam selection and the downlink beam selection.

[0119] In some cases, a first CPU occupancy associated with joint downlink and uplink beam selection is equal to a second CPU occupancy associated with uplink beam selection.

[0120] In some cases, the first number of symbols associated with the joint downlink and uplink beam selection is equal to the total number of symbols associated with the uplink beam selection and the downlink beam selection.

[0121] In some cases, the beam report may be a layer 1 beam report.

[0122] Figure 4 A block diagram 400 of a device 405 supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The device 405 may be an example of aspects of the UE 115 as described herein. The device 405 may include a receiver 410, a transmitter 415, and a communication manager 420. The device 405 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0123] The receiver 410 may provide means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to uplink and downlink beam reports). The information may be communicated to other components of the device 405. The receiver 410 may utilize a single antenna or a collection of multiple antennas.

[0124] The transmitter 415 may provide means for transmitting signals generated by other components of the device 405. For example, the transmitter 415 may transmit information associated with various information channels (e.g., control channels related to uplink and downlink beam reports, data channels, information channels), such as packets, user data, control information, or any combination thereof. In some examples, the transmitter 415 may be co-located with the receiver 410 in a transceiver module. The transmitter 415 may utilize a single antenna or a collection of multiple antennas.

[0125] The communication manager 420, the receiver 410, the transmitter 415, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of uplink and downlink beam reporting as described herein. For example, the communication manager 420, the receiver 410, the transmitter 415, or various combinations thereof, or components thereof, may support methods for performing one or more of the functions described herein.

[0126] In some examples, the communication manager 420, the receiver 410, the transmitter 415, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a digital signal processor (DSP), a central processing unit, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic components, discrete hardware components, or any combination thereof that is configured as or otherwise supports components for performing the functions described in the present disclosure. In some examples, the processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0127] Additionally or alternatively, in some examples, the communication manager 420, the receiver 410, the transmitter 415, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 420, the receiver 410, the transmitter 415, or various combinations or components thereof may be implemented by a general purpose processor, a DSP, a central processing unit, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting components for performing the functions described in the present disclosure).

[0128] In some examples, communication manager 420 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise cooperating with receiver 410, transmitter 415, or both. For example, communication manager 420 may receive information from receiver 410, transmit information to transmitter 415, or be integrated in conjunction with receiver 410, transmitter 415, or both to obtain information, output information, or perform various other operations as described herein.

[0129] According to examples as disclosed herein, the communication manager 420 may support wireless communications at a UE. For example, the communication manager 420 may be configured to or otherwise support components for receiving control signaling from a network entity indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection. The communication manager 420 may be configured to or otherwise support components for receiving a CSI-RS set via a set of multiple beams. The communication manager 420 may be configured to or otherwise support components for sending a beam report identifying a selected uplink beam from a set of multiple beams and a selected downlink beam from a set of multiple beams to a network entity based on the received CSI-RS set and the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0130] By including or configuring a communication manager 420 according to examples as described herein, a device 405 (e.g., a processor controlling or otherwise coupled to a receiver 410, a transmitter 415, a communication manager 420, or a combination thereof) may support techniques for more efficiently utilizing communication resources.

[0131] Figure 5 A block diagram 500 of a device 505 supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The device 505 may be an example of aspects of the device 405 or UE 115 as described herein. The device 505 may include a receiver 510, a transmitter 515, and a communication manager 520. The device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0132] The receiver 510 may provide means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to uplink and downlink beam reports). The information may be communicated to other components of the device 505. The receiver 510 may utilize a single antenna or a collection of multiple antennas.

[0133] The transmitter 515 may provide means for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information associated with various information channels (e.g., control channels related to uplink and downlink beam reports, data channels, information channels), such as packets, user data, control information, or any combination thereof. In some examples, the transmitter 515 may be co-located with the receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or a collection of multiple antennas.

[0134] The device 505 or its various components may be examples of components for performing various aspects of uplink and downlink beam reporting as described herein. For example, the communication manager 520 may include a beam selection configuration manager 525, a CSI-RS manager 530, a beam report manager 535, or any combination thereof. The communication manager 520 may be an example of various aspects of the communication manager 420 as described herein. In some examples, the communication manager 520 or its various components may be configured to use or otherwise cooperate with the receiver 510, the transmitter 515, or both to perform various operations (e.g., receive, obtain, monitor, output, send). For example, the communication manager 520 may receive information from the receiver 510, transmit information to the transmitter 515, or integrate with the receiver 510, the transmitter 515, or both to obtain information, output information, or perform various other operations as described herein.

[0135] According to examples as disclosed herein, the communication manager 520 may support wireless communications at the UE. The beam selection configuration manager 525 may be configured to or otherwise support components for receiving control signaling from a network entity indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection. The CSI-RS manager 530 may be configured to or otherwise support components for receiving a set of CSI-RS via a set of multiple beams. The beam report manager 535 may be configured to or otherwise support components for sending a beam report identifying a selected uplink beam from the set of multiple beams and a selected downlink beam from the set of multiple beams to the network entity based on the received set of CSI-RS and the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection. In some examples, the beam reporting manager 535 can, for example, select an uplink beam from a set of multiple beams, select a downlink beam from a set of multiple beams, or both based at least in part on a received CSI-RS set and control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0136] Figure 6A block diagram 600 of a communication manager 620 supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The communication manager 620 may be an example of aspects of the communication manager 420, the communication manager 520, or both as described herein. The communication manager 620 or its various components may be examples of components for performing various aspects of uplink and downlink beam reporting as described herein. For example, the communication manager 620 may include a beam selection configuration manager 625, a CSI-RS manager 630, a beam report manager 635, an uplink beam selection capability manager 640, an uplink beam selection request manager 645, a downlink beam selection request manager 650, an MPE manager 655, a beam selection manager 660, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

[0137] According to examples as disclosed herein, the communication manager 620 may support wireless communications at the UE. The beam selection configuration manager 625 may be configured to or otherwise support components for receiving control signaling from a network entity indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection. The CSI-RS manager 630 may be configured to or otherwise support components for receiving a set of CSI-RS via a set of multiple beams. The beam report manager 635 may be configured to or otherwise support components for sending a beam report identifying a selected uplink beam from the set of multiple beams and a selected downlink beam from the set of multiple beams to the network entity based on the received set of CSI-RS and the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection. In some examples, the beam selection manager 660 can be configured to or otherwise support components for selecting an uplink beam from a set of multiple beams and selecting a downlink beam from a set of multiple beams based on a received CSI-RS set and control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0138] In some examples, the uplink beam selection capability manager 640 can be configured to or otherwise support components for sending an indication of the UE's ability to report uplink beam selection to a network entity, where received control signaling is based on the indication of the capability.

[0139] In some examples, to support sending an indication of capabilities, the uplink beam selection capability manager 640 can be configured as or otherwise support components for sending an indication of a first number of uplink beam reports and a second number of downlink beam reports supported by the UE.

[0140] In some examples, the uplink beam selection request manager 645 can be configured or otherwise support components for sending a request to a network entity to report uplink beam selection, where receiving control signaling is at least partially responsive to the request.

[0141] In some examples, the MPE manager 655 may be configured or otherwise support components for identifying an MPE constraint associated with the selected uplink beam, wherein sending the request is based on identifying the MPE constraint.

[0142] In some examples, the uplink beam selection request manager 645 may be configured or otherwise support components for determining, based on a previous set of CSI-RS, to request that downlink beam selection be reported separately from uplink beam selection.

[0143] In some examples, the downlink beam selection request manager 650 can be configured to or otherwise support components for sending a request to report joint downlink and uplink beam selection to a network entity and based on a CSI-RS set. In some examples, the beam selection configuration manager 625 can be configured to or otherwise support components for receiving second control signaling from the network entity and at least in part in response to the request indicating that the UE is to report joint downlink and uplink beam selection.

[0144] In some examples, a first CPU occupancy associated with joint downlink and uplink beam selection is equal to a total CPU occupancy associated with uplink beam selection and downlink beam selection.

[0145] In some examples, a first CPU occupancy associated with joint downlink and uplink beam selection is equal to half of a total CPU occupancy associated with uplink beam selection and downlink beam selection.

[0146] In some examples, a first CPU occupancy associated with joint downlink and uplink beam selection is equal to a second CPU occupancy associated with uplink beam selection.

[0147] In some examples, the first number of symbols associated with the joint downlink and uplink beam selection is equal to the total number of symbols associated with the uplink beam selection and the downlink beam selection.

[0148] In some examples, the beam report includes a layer 1 beam report.

[0149] Figure 7A diagram of a system 700 including a device 705 supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The device 705 may be an example of a device 405, a device 505, or a UE 115 as described herein, or include components thereof. The device 705 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. The device 705 may include components for two-way voice and data communications, including components for sending and receiving communications, such as a communication manager 720, an input / output (I / O) controller 710, a transceiver 715, an antenna 725, a memory 730, a code 735, and a processor 740. These components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 745).

[0150] I / O controller 710 can manage input signals and output signals of device 705. I / O controller 710 can also manage peripheral devices that are not integrated into device 705. In some cases, I / O controller 710 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 710 can utilize an operating system, such as or another known operating system. Additionally or alternatively, I / O controller 710 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 710 may be implemented as part of a processor (such as processor 740). In some cases, a user may interact with device 705 via I / O controller 710 or via hardware components controlled by I / O controller 710.

[0151] In some cases, the device 705 may include a single antenna 725. However, in some other cases, the device 705 may have more than one antenna 725, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 715 may communicate bidirectionally via one or more antennas 725, a wired or wireless link, as described herein. For example, the transceiver 715 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 715 may also include a modem for: modulating packets; providing the modulated packets to one or more antennas 725 for transmission; and demodulating packets received from one or more antennas 725. The transceiver 715 or the transceiver 715 and the one or more antennas 725 may be examples of transmitters 415, transmitters 515, receivers 410, receivers 510, or any combination thereof or components thereof as described herein.

[0152] The memory 730 may include random access memory (RAM) and read-only memory (ROM). The memory 730 may store computer-readable, computer-executable code 735 including instructions that, when executed by the processor 740, cause the device 705 to perform various functions described herein. The code 735 may be stored in a non-transitory computer-readable medium such as a system memory or another type of memory. In some cases, the code 735 may not be directly executable by the processor 740, but may (e.g., when compiled and executed) cause the computer to perform the functions described herein. In some cases, the memory 730 may also include, among other things, a basic I / O system (BIOS) that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0153] The processor 740 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a central processing unit, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 740 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 740. The processor 740 may be configured to execute computer-readable instructions stored in a memory (e.g., a memory 730) to enable the device 705 to perform various functions (e.g., functions or tasks that support uplink and downlink beam reporting). For example, the device 705 or a component of the device 705 may include a processor 740 and a memory 730 coupled to or coupled to the processor 740, and the processor 740 and the memory 730 are configured to perform the various functions described herein.

[0154] According to examples as disclosed herein, the communication manager 720 may support wireless communications at a UE. For example, the communication manager 720 may be configured to or otherwise support components for receiving control signaling from a network entity indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection. The communication manager 720 may be configured to or otherwise support components for receiving a CSI-RS set via a set of multiple beams. The communication manager 720 may be configured to or otherwise support components for sending a beam report identifying a selected uplink beam from a set of multiple beams and a selected downlink beam from a set of multiple beams to a network entity based on the received CSI-RS set and the control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0155] By including or configuring a communication manager 720 according to examples as described herein, the device 705 can support techniques for improving communication reliability, more efficiently utilizing communication resources, and improving coordination between devices.

[0156] In some examples, the communication manager 720 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise cooperating with the transceiver 715, one or more antennas 725, or any combination thereof. For example, the communication manager 720 may be configured to receive or transmit messages or other signaling as described herein via the transceiver 715. Although the communication manager 720 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 720 may be supported or performed by the processor 740, the memory 730, the code 735, or any combination thereof. For example, the code 735 may include instructions that may be executed by the processor 740 to cause the device 705 to perform various aspects of uplink and downlink beam reporting as described herein, or the processor 740 and the memory 730 may be otherwise configured to perform or support such operations.

[0157] Figure 8 A block diagram 800 of a device 805 supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The device 805 may be an example of aspects of the network entity 105 as described herein. The device 805 may include a receiver 810, a transmitter 815, and a communication manager 820. The device 805 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0158] The receiver 810 may provide means for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of the device 805. In some examples, the receiver 810 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, the receiver 810 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical) interfaces, wireless interfaces, or any combination thereof.

[0159] The transmitter 815 may provide a means for outputting (e.g., sending, providing, conveying, transmitting) information generated by other components of the device 805. For example, the transmitter 815 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, the transmitter 815 may support outputting information by sending signals via one or more antennas. Additionally or alternatively, the transmitter 815 may support outputting information by sending signals via one or more wired (e.g., electrical, optical) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 815 and the receiver 810 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0160] The communication manager 820, the receiver 810, the transmitter 815, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of uplink and downlink beam reporting as described herein. For example, the communication manager 820, the receiver 810, the transmitter 815, or various combinations thereof, or components thereof, may support methods for performing one or more of the functions described herein.

[0161] In some examples, the communication manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a DSP, a central processing unit, an ASIC, an FPGA or other programmable logic device, a microcontroller, discrete gate or transistor logic components, discrete hardware components, or any combination thereof that is configured as or otherwise supports components for performing the functions described in the present disclosure. In some examples, a processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0162] Additionally or alternatively, in some examples, the communication manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be implemented by a general purpose processor, a DSP, a central processing unit, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting components for performing the functions described in the present disclosure).

[0163] In some examples, the communication manager 820 can be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with the receiver 810, the transmitter 815, or both. For example, the communication manager 820 can receive information from the receiver 810, transmit information to the transmitter 815, or integrate with the receiver 810, the transmitter 815, or both to obtain information, output information, or perform various other operations as described herein.

[0164] According to examples as disclosed herein, the communication manager 820 may support wireless communications at a network entity. For example, the communication manager 820 may be configured to or otherwise support a component for sending control signaling to a UE indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection. The communication manager 820 may be configured to or otherwise support a component for sending a CSI-RS set via a set of multiple beams. The communication manager 820 may be configured to or otherwise support a component for receiving a beam report from a UE identifying a selected uplink beam from a set of multiple beams and a selected downlink beam from a set of multiple beams in response, at least in part, to control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0165] By including or configuring a communication manager 820 according to examples as described herein, a device 805 (e.g., a processor controlling or otherwise coupled to a receiver 810, a transmitter 815, a communication manager 820, or a combination thereof) may support techniques for more efficiently utilizing communication resources.

[0166] Fig. 9 A block diagram 900 of a device 905 supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The device 905 may be an example of aspects of the device 805 or the network entity 105 as described herein. The device 905 may include a receiver 910, a transmitter 915, and a communication manager 920. The device 905 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0167] The receiver 910 may provide means for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of the device 905. In some examples, the receiver 910 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, the receiver 910 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical) interfaces, wireless interfaces, or any combination thereof.

[0168] The transmitter 915 may provide a means for outputting (e.g., sending, providing, conveying, transmitting) information generated by other components of the device 905. For example, the transmitter 915 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, the transmitter 915 may support outputting information by sending signals via one or more antennas. Additionally or alternatively, the transmitter 915 may support outputting information by sending signals via one or more wired (e.g., electrical, optical) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 915 and the receiver 910 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0169] The device 905 or its various components may be examples of components for performing various aspects of uplink and downlink beam reporting as described herein. For example, the communication manager 920 may include a beam selection configuration manager 925, a CSI-RS manager 930, a beam report manager 935, or any combination thereof. The communication manager 920 may be an example of various aspects of the communication manager 820 as described herein. In some examples, the communication manager 920 or its various components may be configured to use or otherwise cooperate with the receiver 910, the transmitter 915, or both to perform various operations (e.g., receive, obtain, monitor, output, send). For example, the communication manager 920 may receive information from the receiver 910, transmit information to the transmitter 915, or integrate with the receiver 910, the transmitter 915, or both to obtain information, output information, or perform various other operations as described herein.

[0170] According to examples as disclosed herein, the communication manager 920 may support wireless communications at a network entity. The beam selection configuration manager 925 may be configured to or otherwise support components for sending control signaling to a UE indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection. The CSI-RS manager 930 may be configured to or otherwise support components for sending a CSI-RS set via a set of multiple beams. The beam report manager 935 may be configured to or otherwise support components for receiving a beam report from a UE identifying a selected uplink beam from a set of multiple beams and a selected downlink beam from a set of multiple beams in response, at least in part, to control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0171] Fig.10 A block diagram 1000 of a communication manager 1020 supporting uplink and downlink beam reporting in accordance with one or more aspects of the present disclosure is shown. The communication manager 1020 may be an example of aspects of the communication manager 820, the communication manager 920, or both as described herein. The communication manager 1020 or its various components may be examples of means for performing various aspects of uplink and downlink beam reporting as described herein. For example, the communication manager 1020 may include a beam selection configuration manager 1025, a CSI-RS manager 1030, a beam report manager 1035, an uplink beam selection capability manager 1040, an uplink beam selection request manager 1045, a downlink beam selection request manager 1050, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses), which communication may include communication within a protocol layer of a protocol stack, communication associated with a logical channel of the protocol stack (e.g., between protocol layers of a protocol stack, within a device, component, or virtualized component associated with the network entity 105, between devices, components, or virtualized components associated with the network entity 105), or any combination thereof.

[0172] According to examples as disclosed herein, the communication manager 1020 may support wireless communications at a network entity. The beam selection configuration manager 1025 may be configured to or otherwise support components for sending control signaling to a UE indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection. The CSI-RS manager 1030 may be configured to or otherwise support components for sending a CSI-RS set via a set of multiple beams. The beam report manager 1035 may be configured to or otherwise support components for receiving a beam report from a UE identifying a selected uplink beam from a set of multiple beams and a selected downlink beam from a set of multiple beams in response, at least in part, to control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0173] In some examples, the uplink beam selection capability manager 1040 can be configured as or otherwise support components for receiving an indication from a UE of the UE's ability to report uplink beam selection, where sending control signaling is based on the indication of the capability.

[0174] In some examples, to support receiving an indication of capabilities, the uplink beam selection capability manager 1040 can be configured as or otherwise support components for receiving an indication of a first number of uplink beam reports and a second number of downlink beam reports supported by the UE.

[0175] In some examples, the uplink beam selection request manager 1045 can be configured or otherwise support components for receiving a request from a UE to report uplink beam selection, wherein receiving control signaling is at least partially responsive to the request.

[0176] In some examples, downlink beam selection request manager 1050 can be configured to or otherwise support components for receiving a request from a UE to report joint downlink and uplink beam selection. In some examples, beam selection configuration manager 1025 can be configured to or otherwise support components for sending second control signaling to the UE and at least in part in response to the request indicating that the UE is to report joint downlink and uplink beam selection.

[0177] In some examples, a first CPU occupancy associated with joint downlink and uplink beam selection is equal to a total CPU occupancy associated with uplink beam selection and downlink beam selection.

[0178] In some examples, a first CPU occupancy associated with joint downlink and uplink beam selection is equal to half of a total CPU occupancy associated with uplink beam selection and downlink beam selection.

[0179] In some examples, a first CPU occupancy associated with joint downlink and uplink beam selection is equal to a second CPU occupancy associated with uplink beam selection.

[0180] In some examples, the first number of symbols associated with the joint downlink and uplink beam selection is equal to the total number of symbols associated with the uplink beam selection and the downlink beam selection.

[0181] In some examples, the beam report includes a layer 1 beam report.

[0182] Fig.11 A diagram of a system 1100 including a device 1105 supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The device 1105 may be an example of a device 805, a device 905, or a network entity 105 as described herein, or include components thereof. The device 1105 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, which communication may include communication through one or more wired interfaces, through one or more wireless interfaces, or any combination thereof. The device 1105 may include components that support output and acquisition of communications, such as a communication manager 1120, a transceiver 1110, an antenna 1115, a memory 1125, a code 1130, and a processor 1135. 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 1140).

[0183] The transceiver 1110 may support bidirectional communication via a wired link, a wireless link, or both as described herein. In some examples, the transceiver 1110 may include a wired transceiver and may communicate bidirectionally with another wired transceiver. Additionally or alternatively, in some examples, the transceiver 1110 may include a wireless transceiver and may communicate bidirectionally with another wireless transceiver. In some examples, the device 1105 may include one or more antennas 1115, which may be capable of sending or receiving wireless transmissions (e.g., concurrently). The transceiver 1110 may also include a modem for: modulating a signal; providing the modulated signal for transmission (e.g., via one or more antennas 1115, via a wired transmitter); receiving the modulated signal (e.g., from one or more antennas 1115, from a wired receiver); and demodulating the signal. In some implementations, the transceiver 1110 may include one or more interfaces, such as one or more interfaces coupled to one or more antennas 1115 configured to support various receiving or obtaining operations, or one or more interfaces coupled to one or more antennas 1115 configured to support various transmitting or outputting operations, or a combination thereof. In some implementations, the transceiver 1110 may include or be configured to be coupled to one or more processors or memory components, which 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 output, or any combination thereof. In some implementations, the transceiver 1110, or the transceiver 1110 and one or more antennas 1115, or the transceiver 1110 and one or more antennas 1115 and one or more processors or memory components (e.g., processor 1135 or memory 1125 or both) may be included in a chip or chip assembly installed in the device 1105. In some examples, the transceiver may be operable to support communications via one or more communication links (eg, communication link 125, backhaul communication link 120, midhaul communication link 162, fronthaul communication link 168).

[0184] The memory 1125 may include RAM and ROM. The memory 1125 may store computer-readable, computer-executable code 1130 including instructions that, when executed by the processor 1135, cause the device 1105 to perform various functions described herein. The code 1130 may be stored in a non-transitory computer-readable medium such as a system memory or another type of memory. In some cases, the code 1130 may not be directly executable by the processor 1135, but may (e.g., when compiled and executed) cause the computer to perform the functions described herein. In some cases, the memory 1125 may also include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0185] The processor 1135 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, an ASIC, a central processing unit, an FPGA, a microcontroller, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 1135 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 1135. The processor 1135 may be configured to execute computer-readable instructions stored in a memory (e.g., a memory 1125) to enable the device 1105 to perform various functions (e.g., functions or tasks that support uplink and downlink beam reporting). For example, the device 1105 or a component of the device 1105 may include a processor 1135 and a memory 1125 coupled to the processor 1135, and the processor 1135 and the memory 1125 are configured to perform various functions described herein. The processor 1135 may be an example of a cloud computing platform (e.g., one or more physical nodes and supporting software such as an operating system, a virtual machine, or a container instance), which may host functions for performing functions of the device 1105 (e.g., by executing code 1130). The processor 1135 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in the device 1105 (such as in the memory 1125). In some specific implementations, the processor 1135 may be a component of a processing system. A processing system may generally refer to a system or a series of machines or components that receive inputs and process these inputs to produce a set of outputs (which may be delivered to, for example, other systems or components of the device 1105). For example, the processing system of the device 1105 may refer to a system including various other components or subcomponents of the device 1105 (such as the processor 1135, or the transceiver 1110, or the communication manager 1120, or other components or combinations of components of the device 1105). The processing system of the device 1105 may interface with other components of the device 1105 and may process information (such as inputs or signals) received from other components or output information to other components. For example, a chip or modem of the device 1105 may include a processing system and one or more interfaces for outputting information or for obtaining information or both. One or more interfaces may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information or the same interface configured to output information and obtain information, as well as other specific implementations. In some specific implementations, one or more interfaces may refer to an interface between a processing system of a chip or modem and a transmitter, so that the device 1105 can send information output from the chip or modem. Additionally or alternatively, in some specific implementations, one or more interfaces may refer to an interface between a processing system of a chip or modem and a receiver, so that the device 1105 can obtain information or signal input, and the information can be passed to the processing system.One of ordinary skill in the art will readily recognize that the first interface may also obtain information or signal input, and the second interface may also output information or signal output.

[0186] In some examples, bus 1140 may support communications of protocol layers (e.g., within protocol layers) of a protocol stack. In some examples, bus 1140 may support communications associated with logical channels of a protocol stack (e.g., between protocol layers of a protocol stack), which may include communications performed within components of device 1105, or communications performed between different components of device 1105 that may be co-located or may be located in different locations (e.g., where device 1105 may refer to a system in which one or more of communication manager 1120, transceiver 1110, memory 1125, code 1130, and processor 1135 may be located in one of the different components or divided between the different components).

[0187] In some examples, the communication manager 1120 may manage aspects of communications with the core network 130 (e.g., via one or more wired or wireless backhaul links). For example, the communication manager 1120 may manage the delivery of data communications for client devices such as one or more UEs 115. In some examples, the communication manager 1120 may manage communications with other network entities 105 and may include a controller or scheduler for controlling communications with the UE 115 in coordination with the other network entities 105. In some examples, the communication manager 1120 may support an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between network entities 105.

[0188] According to examples as disclosed herein, the communication manager 1120 may support wireless communications at a network entity. For example, the communication manager 1120 may be configured to or otherwise support a component for sending a control signaling to a UE indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection. The communication manager 1120 may be configured to or otherwise support a component for sending a CSI-RS set via a set of multiple beams. The communication manager 1120 may be configured to or otherwise support a component for receiving a beam report from a UE identifying a selected uplink beam from a set of multiple beams and a selected downlink beam from a set of multiple beams in response, at least in part, to control signaling indicating that the UE is to report uplink beam selection and downlink beam selection.

[0189] By including or configuring a communication manager 1120 according to examples as described herein, the device 1105 can support techniques for improving communication reliability, more efficiently utilizing communication resources, and improving coordination between devices.

[0190] In some examples, the communication manager 1120 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise cooperating with the transceiver 1110, one or more antennas 1115 (e.g., where applicable), or any combination thereof. Although the communication manager 1120 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 1120 may be supported or performed by the transceiver 1110, the processor 1135, the memory 1125, the code 1130, or any combination thereof. For example, the code 1130 may include instructions that are executable by the processor 1135 to cause the device 1105 to perform various aspects of uplink and downlink beam reporting as described herein, or the processor 1135 and the memory 1125 may be otherwise configured to perform or support such operations.

[0191] Fig.12 A flowchart illustrating a method 1200 for supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The operations of the method 1200 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1200 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 7 The described UE 115 may be performed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0192] At 1205, the method may include: receiving control signaling from a network entity indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection. The operations of 1205 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1205 may be performed as described in reference to Figure 6 The described beam selection is performed by the configuration manager 625. Additionally or alternatively, means for performing 1205 may, but need not necessarily include, for example, an antenna 725, a transceiver 715, a communication manager 720, a memory 730 (including code 735), a processor 740, and / or a bus 745.

[0193] At 1210, the method may include receiving a CSI-RS set via a set of multiple beams. The operations of 1210 may be performed according to examples disclosed herein. In some examples, aspects of the operations of 1210 may be performed as described in reference to Figure 6 The CSI-RS manager 630 is used to perform. Additionally or alternatively, the components for performing 1210 may, but not necessarily include, for example, an antenna 725, a transceiver 715, a communication manager 720, a memory 730 (including code 735), a processor 740, and / or a bus 745.

[0194] At 1215, the method may include: based on the received CSI-RS set and the control signaling indicating that the UE is to report the uplink beam selection and the downlink beam selection, sending a beam report identifying the selected uplink beam from the set of multiple beams and the selected downlink beam from the set of multiple beams to the network entity. The operations of 1215 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1215 may be performed as described in reference to Figure 6 Additionally or alternatively, means for performing 1215 may, but need not necessarily include, for example, antenna 725, transceiver 715, communication manager 720, memory 730 (including code 735), processor 740, and / or bus 745.

[0195] Fig.13 A flowchart illustrating a method 1300 for supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The operations of the method 1300 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1300 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 7 The described UE 115 may be performed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0196] At 1305, the method may include sending a request to a network entity to report uplink beam selection. The operations of 1305 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1305 may be performed as described in reference to Figure 6 The uplink beam selection request manager 645 is described as being performed. Additionally or alternatively, the means for performing 1305 may, but need not necessarily include, for example, an antenna 725, a transceiver 715, a communication manager 720, a memory 730 (including code 735), a processor 740, and / or a bus 745.

[0197] At 1310, the method may include: receiving control signaling from a network entity indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection, wherein receiving the control signaling is at least partially responsive to the request. The operations of 1310 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1310 may be performed as described in reference to Figure 6The described beam selection is performed by the configuration manager 625. Additionally or alternatively, means for performing 1310 may, but need not necessarily include, for example, an antenna 725, a transceiver 715, a communication manager 720, a memory 730 (including code 735), a processor 740, and / or a bus 745.

[0198] At 1315, the method may include receiving a set of CSI-RS via a set of multiple beams. The operations of 1315 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1315 may be performed as described in reference to Figure 6 The CSI-RS manager 630 is used to perform. Additionally or alternatively, the components for performing 1315 may, but not necessarily include, for example, an antenna 725, a transceiver 715, a communication manager 720, a memory 730 (including code 735), a processor 740, and / or a bus 745.

[0199] At 1320, the method may include: selecting an uplink beam from a set of multiple beams and selecting a downlink beam from a set of multiple beams based on the received CSI-RS set and control signaling indicating that the UE is to report uplink beam selection and downlink beam selection. The operations of 1320 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1320 may be performed as described in reference to Figure 6 Additionally or alternatively, means for performing 1320 may, but need not necessarily include, for example, antenna 725, transceiver 715, communication manager 720, memory 730 (including code 735), processor 740, and / or bus 745.

[0200] At 1325, the method may include: based on the received CSI-RS set and the control signaling indicating that the UE is to report the uplink beam selection and the downlink beam selection, sending a beam report identifying the selected uplink beam from the set of multiple beams and the selected downlink beam from the set of multiple beams to the network entity. The operations of 1325 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1325 may be performed as described in reference to Figure 6 Additionally or alternatively, means for performing 1320 may, but need not necessarily include, for example, antenna 725, transceiver 715, communication manager 720, memory 730 (including code 735), processor 740, and / or bus 745.

[0201] Fig.14A flowchart illustrating a method 1400 for supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The operations of the method 1400 may be implemented by a network entity or a component thereof as described herein. For example, the operations of the method 1400 may be implemented by a network entity or a component thereof as described in reference to Figures 1 to 3 as well as Figures 8 to 11 In some examples, the network entity may execute an instruction set to control the functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform various aspects of the described functions.

[0202] At 1405, the method may include: sending control signaling to the UE indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection. The operations of 1405 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1405 may be performed as described in reference to Fig.10 The described beam selection is performed by the configuration manager 1025. Additionally or alternatively, means for performing 1405 may, but need not necessarily include, for example, antenna 1115, transceiver 1110, communication manager 1120, memory 1125 (including code 1130), processor 1135, and / or bus 1140.

[0203] At 1410, the method may include: transmitting a CSI-RS set via a set of multiple beams. The operations of 1410 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1410 may be performed as described in reference to Fig.10 The CSI-RS manager 1030 is used to perform. Additionally or alternatively, the components for performing 1410 may but need not include, for example, an antenna 1115, a transceiver 1110, a communication manager 1120, a memory 1125 (including code 1130), a processor 1135, and / or a bus 1140.

[0204] At 1415, the method may include receiving a beam report from the UE identifying a selected uplink beam from a set of multiple beams and a selected downlink beam from a set of multiple beams in response, at least in part, to control signaling indicating that the UE is to report uplink beam selection and downlink beam selection. The operations of 1415 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1415 may be performed as described in reference to Fig.10 Additionally or alternatively, the means for performing 1415 may, but need not necessarily include, for example, antenna 1115, transceiver 1110, communication manager 1120, memory 1125 (including code 1130), processor 1135, and / or bus 1140.

[0205] Fig.15 A flowchart illustrating a method 1500 for supporting uplink and downlink beam reporting according to one or more aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by a network entity or a component thereof as described herein. For example, the operations of the method 1500 may be implemented by a network entity or a component thereof as described in reference to Figures 1 to 3 as well as Figures 8 to 11 In some examples, the network entity may execute an instruction set to control the functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform various aspects of the described functions.

[0206] At 1505, the method may include receiving a request from the UE to report uplink beam selection. The operations of 1505 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1505 may be performed as described in reference to Fig.10 The uplink beam selection request manager 1045 described above is executed. Additionally or alternatively, the means for executing 1505 may, but need not necessarily include, for example, an antenna 1115, a transceiver 1110, a communication manager 1120, a memory 1125 (including code 1130), a processor 1135, and / or a bus 1140.

[0207] At 1510, the method may include: sending control signaling to the UE indicating a set of multiple beams and that the UE is to report uplink beam selection and downlink beam selection, wherein receiving the control signaling is at least partially responsive to the request. The operations of 1510 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1510 may be performed as described in reference to Fig.10 The described beam selection configuration manager 1025 is performed. Additionally or alternatively, means for performing 1510 may, but need not necessarily include, for example, antenna 1115, transceiver 1110, communication manager 1120, memory 1125 (including code 1130), processor 1135, and / or bus 1140.

[0208] At 1515, the method may include: transmitting a CSI-RS set via a set of multiple beams. The operations of 1515 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1515 may be performed as described in reference Fig.10 The CSI-RS manager 1030 is used to perform. Additionally or alternatively, the components for performing 1515 may but need not include, for example, an antenna 1115, a transceiver 1110, a communication manager 1120, a memory 1125 (including code 1130), a processor 1135, and / or a bus 1140.

[0209] At 1520, the method may include receiving a beam report from the UE identifying a selected uplink beam from a set of multiple beams and a selected downlink beam from a set of multiple beams in response, at least in part, to control signaling indicating that the UE is to report uplink beam selection and downlink beam selection. The operations of 1520 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1520 may be performed as described in reference to Fig.10 Additionally or alternatively, the means for performing 1520 may, but need not necessarily include, for example, antenna 1115, transceiver 1110, communication manager 1120, memory 1125 (including code 1130), processor 1135, and / or bus 1140.

[0210] The following provides an overview of various aspects of the disclosure:

[0211] Aspect 1: A method for wireless communication at a UE, comprising: receiving control signaling from a network entity indicating multiple beams and that the UE is to report uplink beam selection and downlink beam selection; receiving a CSI-RS set via the multiple beams; and sending a beam report to the network entity identifying a selected uplink beam selected from the multiple beams and a selected downlink beam selected from the multiple beams based at least in part on the received channel state information reference signal set and the control signaling indicating that the UE is to report the uplink beam selection and the downlink beam selection.

[0212] Aspect 2: The method according to Aspect 1 further includes: sending an indication of the UE's ability to report the uplink beam selection to the network entity, wherein receiving the control signaling is based on the indication of the capability.

[0213] Aspect 3: A method according to aspect 2, wherein sending the indication of the capability includes: sending an indication of a first number of uplink beam reports and a second number of downlink beam reports supported by the UE.

[0214] Aspect 4: The method according to any one of Aspects 1 to 3 further includes: sending a request to the network entity to report the uplink beam selection, wherein receiving the control signaling is at least partially in response to the request.

[0215] Aspect 5: The method according to aspect 4 further includes: identifying an MPE constraint associated with the selected uplink beam, wherein sending the request is based at least in part on identifying the MPE constraint.

[0216] Aspect 6: The method according to any one of aspects 4 to 5 further includes: determining, based on a previous set of CSI-RS, to request that the downlink beam selection be reported separately from the uplink beam selection.

[0217] Aspect 7: The method according to any one of Aspects 1 to 6 further includes: sending a request to report joint downlink and uplink beam selection to the network entity and at least partially based on the CSI-RS set; and receiving a second control signaling from the network entity and at least partially in response to the request, indicating that the UE is to report the joint downlink and uplink beam selection.

[0218] Aspect 8: A method according to any one of Aspects 1 to 7, wherein the first channel state information processing unit occupancy associated with the joint downlink and uplink beam selection is equal to the total channel state information processing unit occupancy associated with the uplink beam selection and the downlink beam selection.

[0219] Aspect 9: A method according to any one of Aspects 1 to 7, wherein the occupancy of a first channel state information processing unit associated with a joint downlink and uplink beam selection is equal to half of the occupancy of a total channel state information processing unit associated with the uplink beam selection and the downlink beam selection.

[0220] Aspect 10: A method according to any one of Aspects 1 to 7, wherein a first channel state information processing unit occupancy associated with a joint downlink and uplink beam selection is equal to a second channel state information processing unit occupancy associated with the uplink beam selection.

[0221] Aspect 11: A method according to any one of Aspects 1 to 10, wherein the first number of symbols associated with the joint downlink and uplink beam selection is equal to the total number of symbols associated with the uplink beam selection and the downlink beam selection.

[0222] Aspect 12: A method according to any one of Aspects 1 to 11, wherein the beam report comprises a layer 1 beam report.

[0223] Aspect 13: A method for wireless communication at a network entity, comprising: sending control signaling to a UE indicating multiple beams and that the UE is to report uplink beam selection and downlink beam selection; sending a CSI-RS set via the multiple beams; and receiving a beam report from the UE identifying a selected uplink beam selected from the multiple beams and a selected downlink beam selected from the multiple beams in response, at least in part, to the control signaling indicating that the UE is to report the uplink beam selection and the downlink beam selection.

[0224] Aspect 14: The method according to aspect 13 also includes: receiving an indication of the UE's ability to report the uplink beam selection from the UE, wherein sending the control signaling is based on the indication of the capability.

[0225] Aspect 15: A method according to aspect 14, wherein receiving the indication of the capability includes: receiving an indication of a first number of uplink beam reports and a second number of downlink beam reports supported by the UE.

[0226] Aspect 16: The method according to any one of Aspects 13 to 15 further includes: receiving a request from the UE to report the uplink beam selection, wherein receiving the control signaling is at least partially in response to the request.

[0227] Aspect 17: The method according to any one of Aspects 13 to 16 also includes: receiving a request from the UE to report the joint downlink and uplink beam selection; and sending a second control signaling to the UE and at least partially in response to the request, indicating that the UE is to report the joint downlink and uplink beam selection.

[0228] Aspect 18: A method according to any one of Aspects 13 to 17, wherein the first channel state information processing unit occupancy associated with the joint downlink and uplink beam selection is equal to the total channel state information processing unit occupancy associated with the uplink beam selection and the downlink beam selection.

[0229] Aspect 19: A method according to any one of Aspects 13 to 17, wherein the occupancy of a first channel state information processing unit associated with a joint downlink and uplink beam selection is equal to half of the occupancy of a total channel state information processing unit associated with the uplink beam selection and the downlink beam selection.

[0230] Aspect 20: A method according to any one of Aspects 13 to 17, wherein a first channel state information processing unit occupancy associated with a joint downlink and uplink beam selection is equal to a second channel state information processing unit occupancy associated with the uplink beam selection.

[0231] Aspect 21: A method according to any one of Aspects 13 to 20, wherein a first number of symbols associated with a joint downlink and uplink beam selection is equal to a total number of symbols associated with the uplink beam selection and the downlink beam selection.

[0232] Aspect 22: A method according to any one of Aspects 13 to 21, wherein the beam report comprises a layer 1 beam report.

[0233] Aspect 23: An apparatus for wireless communication, comprising: a memory, a transceiver, and at least one processor of a UE, the at least one processor being coupled to the memory and the transceiver, and the at least one processor being configured to execute a method according to any one of Aspects 1 to 12.

[0234] Aspect 24: An apparatus for wireless communication at a UE, the apparatus comprising: at least one component for performing the method according to any one of aspects 1 to 12.

[0235] Aspect 25: A non-transitory computer-readable medium storing a code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method according to any one of aspects 1 to 12.

[0236] Aspect 26: An apparatus for wireless communication, comprising: a memory; and at least one processor of a network entity, the at least one processor being coupled to the memory and the transceiver, and the at least one processor being configured to execute a method according to any one of Aspects 13 to 22.

[0237] Aspect 27: An apparatus for wireless communication at a network entity, the apparatus comprising at least one component for performing a method according to any one of aspects 13 to 22.

[0238] Aspect 28: A non-transitory computer-readable medium storing code for wireless communication at a network entity, the code comprising instructions executable by a processor to perform the method according to any one of aspects 13 to 22.

[0239] It should be noted that the methods described herein describe possible implementations, and that the various operations and steps may be rearranged or otherwise modified and that other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0240] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0241] The information and signals described herein may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the specification may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0242] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed using a general purpose processor, a DSP, an ASIC, a central processing unit, 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 an alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0243] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as one or more instructions or codes of a computer-readable medium, or sent using one or more instructions or codes of a computer-readable medium. Other examples and specific implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these items. Features that implement the functions may also be physically located at different locations, including being distributed so that the various parts of the functions are implemented at different physical locations.

[0244] Computer-readable medium includes both non-transient computer storage medium and communication medium, and the communication medium includes any medium that promotes the transfer of computer programs from one location to another location.Non-transient storage medium can be any available medium that can be accessed by a general or special computer.By way of example and not limitation, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage device, disk storage device or other magnetic storage device, or can be used for carrying or storing desired program code components and any other non-transient medium that can be accessed by a general or special computer or a general or special processor in the form of an instruction or data structure.Moreover, any connection is appropriately referred to as computer-readable medium.For example, if software is sent from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwave, then 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. As used herein, disks and optical disks include CDs, laser disks, optical disks, digital versatile disks (DVDs), floppy disks, and Blu-ray disks. Disks can reproduce data magnetically, and optical disks can reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0245] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items followed by a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0246] The term "determining" encompasses a variety of actions, and thus, "determining" may include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, database or other data structure), ascertaining, and the like. Furthermore, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data stored in a memory), etc. Additionally, "determining" may include parsing, obtaining, selecting, choosing, establishing, and other such similar actions.

[0247] In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by following the reference label with a dash and a second label to distinguish between similar components. If only the first reference label is used in the specification, the description may apply to any of the similar components having the same first reference label, regardless of the second or other subsequent reference labels.

[0248] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "advantageous over other examples." The specific implementation includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some cases, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0249] The description herein is provided to enable one of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), the method comprising: receiving control signaling from a network entity indicating a plurality of beams and that the UE is to report uplink beam selection and downlink beam selection; receiving a set of channel state information reference signals via the plurality of beams; as well as At least in part based on the received channel state information reference signal set and the control signaling indicating that the UE is to report the uplink beam selection and the downlink beam selection, send a beam report identifying a selected uplink beam selected from the multiple beams and a selected downlink beam selected from the multiple beams to the network entity.

2. The method according to claim 1, further comprising: An indication of an ability of the UE to report the uplink beam selection is sent to the network entity, wherein receiving the control signaling is based on the indication of the capability.

3. The method of claim 2, wherein sending the indication of the capability comprises: Send an indication of a first number of uplink beam reports and a second number of downlink beam reports supported by the UE.

4. The method according to claim 1, further comprising: A request is sent to the network entity to report the uplink beam selection, wherein receiving the control signaling is at least partially responsive to the request.

5. The method according to claim 4, further comprising: A maximum possible exposure constraint associated with the selected uplink beam is identified, wherein sending the request is based at least in part on identifying the maximum possible exposure constraint.

6. The method according to claim 4, further comprising: A determination is made based on a previous set of channel state information reference signals to request that the downlink beam selection be reported separately from the uplink beam selection.

7. The method according to claim 1, further comprising: sending, to the network entity and based at least in part on a set of channel state information reference signals, a request to report joint downlink and uplink beam selection; as well as Second control signaling is received from the network entity and at least in part in response to the request indicating that the UE is to report the joint downlink and uplink beam selection.

8. The method of claim 1, wherein a first channel state information processing unit occupancy associated with a joint downlink and uplink beam selection is equal to a total channel state information processing unit occupancy associated with the uplink beam selection and the downlink beam selection.

9. The method of claim 1, wherein a first channel state information processing unit occupancy associated with a joint downlink and uplink beam selection is equal to half of a total channel state information processing unit occupancy associated with the uplink beam selection and the downlink beam selection.

10. The method of claim 1, wherein a first channel state information processing unit occupancy associated with a joint downlink and uplink beam selection is equal to a second channel state information processing unit occupancy associated with the uplink beam selection.

11. The method of claim 1, wherein a first number of symbols associated with a joint downlink and uplink beam selection is equal to a total number of symbols associated with the uplink beam selection and the downlink beam selection.

12. The method of claim 1, wherein the beam report comprises a layer 1 beam report.

13. A method for wireless communication at a network entity, the method comprising: sending control signaling to a user equipment (UE) indicating multiple beams and that the UE is to report uplink beam selection and downlink beam selection; transmitting a set of channel state information reference signals via the plurality of beams; as well as A beam report identifying a selected uplink beam selected from the plurality of beams and a selected downlink beam selected from the plurality of beams is received from the UE at least in part in response to the control signaling indicating that the UE is to report the uplink beam selection and the downlink beam selection.

14. The method according to claim 13, further comprising: An indication of a capability of the UE to report the uplink beam selection is received from the UE, wherein sending the control signaling is based on the indication of the capability.

15. The method of claim 14, wherein receiving the indication of the capability comprises: Receive an indication of a first number of uplink beam reports and a second number of downlink beam reports supported by the UE.

16. The method according to claim 13, further comprising: A request is received from the UE to report the uplink beam selection, wherein receiving the control signaling is at least partially responsive to the request.

17. The method according to claim 13, further comprising: receiving, from the UE, a request to report joint downlink and uplink beam selection; as well as Second control signaling is sent to the UE and at least in part in response to the request indicating that the UE is to report the joint downlink and uplink beam selection.

18. The method of claim 13, wherein a first channel state information processing unit occupancy associated with a joint downlink and uplink beam selection is equal to a total channel state information processing unit occupancy associated with the uplink beam selection and the downlink beam selection.

19. The method of claim 13, wherein a first channel state information processing unit occupancy associated with a joint downlink and uplink beam selection is equal to half of a total channel state information processing unit occupancy associated with the uplink beam selection and the downlink beam selection.

20. The method of claim 13, wherein a first channel state information processing unit occupancy associated with a joint downlink and uplink beam selection is equal to a second channel state information processing unit occupancy associated with the uplink beam selection.

21. The method of claim 13, wherein a first number of symbols associated with a joint downlink and uplink beam selection is equal to a total number of symbols associated with the uplink beam selection and the downlink beam selection.

22. The method of claim 13, wherein the beam report comprises a layer 1 beam report.

23. An apparatus for wireless communication, the apparatus comprising: Memory; Transceiver; and At least one processor of a user equipment (UE), the at least one processor coupled to the memory and the transceiver, and the at least one processor configured to: receiving, via the transceiver, control signaling from a network entity indicating a plurality of beams and that the UE is to report uplink beam selection and downlink beam selection; receiving, via the transceiver and via the plurality of beams, a set of channel state information reference signals; as well as A beam report identifying a selected uplink beam selected from the multiple beams and a selected downlink beam selected from the multiple beams is sent to the network entity via the transceiver based at least in part on the received channel state information reference signal set and the control signaling indicating that the UE is to report the uplink beam selection and the downlink beam selection.

24. The apparatus of claim 23, wherein the at least one processor is further configured to: An indication of an ability of the UE to report the uplink beam selection is sent to the network entity, wherein receiving the control signaling is based on the indication of the capability.

25. The apparatus of claim 24, wherein to send the indication of the capability, the at least one processor is further configured to: Send an indication of a first number of uplink beam reports and a second number of downlink beam reports supported by the UE.

26. The apparatus of claim 23, wherein the at least one processor is further configured to: A request is sent to the network entity to report the uplink beam selection, wherein receiving the control signaling is at least partially responsive to the request.

27. The apparatus of claim 26, wherein the at least one processor is further configured to: A maximum possible exposure constraint associated with the selected uplink beam is identified, wherein sending the request is based at least in part on identifying the maximum possible exposure constraint.

28. The apparatus of claim 26, wherein the at least one processor is further configured to: A determination is made based on a previous set of channel state information reference signals to request that the downlink beam selection be reported separately from the uplink beam selection.

29. The apparatus of claim 23, wherein the at least one processor is further configured to: sending a request to report joint downlink and uplink beam selection to the network entity and based at least in part on the set of channel state information reference signals; and Second control signaling is received from the network entity and at least in part in response to the request indicating that the UE is to report the joint downlink and uplink beam selection.

30. An apparatus for wireless communication, the apparatus comprising: Memory; and at least one processor of a network entity, the at least one processor being coupled to the memory, and the at least one processor being configured to: sending control signaling to a user equipment (UE) indicating multiple beams and that the UE is to report uplink beam selection and downlink beam selection; transmitting a set of channel state information reference signals via the plurality of beams; and A beam report identifying a selected uplink beam selected from the plurality of beams and a selected downlink beam selected from the plurality of beams is received from the UE at least in part in response to the control signaling indicating that the UE is to report the uplink beam selection and the downlink beam selection.

Images