Techniques for beam selection with uplink considerations

Abstract

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may select a set of candidate UE beams for measuring a channel state information (CSI) reference signal (CSI-RS) based on one or more power measurements for uplink transmission. The UE may measure a plurality of synchronization signal blocks (SSBs) using the set of candidate UE beams and select a subset of selected candidate beams based on the SSB measurements. The UE may measure spectral efficiency via the resource carrying the CSI-RS using the subset of candidate UE beams and select a serving beam from the subset based on the spectral efficiency for each beam. The UE may calculate the power measurement for each candidate beam based on a difference between a power threshold and a reference power value.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. patent application No. 17 / 901,440, entitled “TECHNIQUES FOR BEAM SELECTION WITH UPLINK CONSIDERATION,” filed by Zhu et al. on September 1, 2022, which is assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0003] The following relates to wireless communications, including techniques for beam selection with uplink considerations. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, and the like. 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

[0005] The described technology relates to methods, systems, devices, and apparatuses that support improved beam selection for utilizing uplink considerations. For example, a user equipment (UE) may select a set of candidate UE beams for measuring a channel state information (CSI) reference signal (CSI-RS) based on one or more power measurements for uplink transmissions. The UE may use the set of candidate UE beams to measure multiple synchronization signal blocks (SSBs), and select a subset of the selected candidate beams based on the SSB measurements (e.g., refine, update the list of candidate beams based on high reference signal received power (RSRP), channel impulse response, or both). The UE may use a subset of candidate UE beams to measure spectral efficiency via resources carrying CSI-RS, and select a serving beam from the subset based on the spectral efficiency of each beam (e.g., select a beam with the best spectral efficiency). In some cases, the UE may calculate a power measurement based on the difference between a power threshold and a reference power value, wherein the power measurement may include a virtual power headroom (vPHR) value for each candidate beam.

[0006] A method for wireless communication at a UE is described. The method may include: measuring a set of synchronization signal blocks; selecting a set of candidate beams for measuring a channel state information reference signal based at least in part on a power measurement associated with uplink performance; selecting a subset of the candidate beams for measuring the channel state information reference signal based on the set of synchronization signal block measurements; measuring spectral efficiency using a first candidate beam from the subset of the set of candidate beams based on the channel state information reference signal; and sending a spectral efficiency measurement to a network entity based on measuring the spectral efficiency using the candidate UE beams.

[0007] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to: measure a set of synchronization signal blocks; select a set of candidate beams for measuring a channel state information reference signal based at least in part on a power measurement associated with uplink performance; select a subset of the candidate beams for measuring the channel state information reference signal based on the set of synchronization signal block measurements; measure spectral efficiency using a first candidate beam from the subset of the candidate beam set based on the channel state information reference signal; and send a spectral efficiency measurement to a network entity based on measuring spectral efficiency using a candidate UE beam.

[0008] Another apparatus for wireless communication at a UE is described. The apparatus may include: a component for measuring a set of synchronization signal blocks; a component for selecting a set of candidate beams for measuring a channel state information reference signal based at least in part on a power measurement associated with uplink performance; a component for selecting a subset of the candidate beams for measuring the channel state information reference signal based on the set of synchronization signal block measurements; a component for measuring spectral efficiency using a first candidate beam from the subset of the set of candidate beams based on the channel state information reference signal; and a component for sending a spectral efficiency measurement to a network entity based on measuring spectral efficiency using the candidate UE beams.

[0009] 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: measuring a set of synchronization signal blocks; selecting a set of candidate beams for measuring a channel state information reference signal based at least in part on a power measurement associated with uplink performance; selecting a subset of the candidate beams for measuring the channel state information reference signal based on the set of synchronization signal block measurements; measuring spectral efficiency using a first candidate beam from the subset of the candidate beam set based on the channel state information reference signal; and sending a spectral efficiency measurement to a network entity based on measuring spectral efficiency using a candidate UE beam.

[0010] Some examples of the methods, devices, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: calculating the power measurement based on a difference between a power threshold and a reference power value; and determining the number of UE beams for the candidate UE beam set based on the calculated power measurement.

[0011] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for calculating the power threshold based on a difference between a transmit power value, a first power reduction value, and a second power reduction value, wherein the power threshold may be a maximum transmit power limit.

[0012] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for calculating the reference power value based on a combination of uplink channel values, path loss values, frequency, and bandwidth values, wherein the reference power value may be a reference requested power.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the bandwidth value includes a maximum transmission bandwidth and a number of carriers.

[0014] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the power measurement includes one or more virtual power headroom values ​​associated with corresponding beams of the candidate UE beam set.

[0015] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: selecting the candidate UE beam set may be based on the power measurement being positive.

[0016] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: selecting a serving UE beam for measuring the channel state information reference signal based on the set of synchronization signal block measurements; and generating a measurement report based on the spectral efficiency measurement and the last channel state information reference signal measurement on the serving UE beam.

[0017] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for reselecting the serving UE beam based on measuring the channel state information reference signal.

[0018] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, reselecting the serving UE beam may include operations, features, components, or instructions for performing filtering, biasing, thresholding, or any combination thereof on a measured first rank and a second rank of the channel state information reference signal, wherein reselection of the serving UE beam may be based on the filtering, the biasing, the thresholding, or any combination thereof.

[0019] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for predicting a set of time resources for a channel state information reference signal based on one or more previous channel state information reference signal configurations.

[0020] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: determining a time slot format for a time slot including a set of time resources for a channel state information reference signal, wherein the time slot format includes at least one downlink shared channel resource; and monitoring the time slot using the candidate UE beam based on determining the time slot format, wherein the channel state information reference signal can be measured based on monitoring the time slot.

[0021] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: using the candidate UE beam to measure a demodulation reference signal on the at least one downlink shared channel resource; and performing channel estimation for the time slot based on measuring the demodulation reference signal.

[0022] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for using the candidate UE beam for a set of multiple time slots based on a time window around a set of time resources for the channel state information reference signal, wherein the channel state information reference signal may be measured during at least one symbol in the set of multiple time slots.

[0023] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining a scheduling change for the network entity, wherein the candidate UE beam may be used for the set of multiple time slots based on the scheduling change.

[0024] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, using the candidate UE beam for the set of multiple time slots may include operations, features, components, or instructions for using the candidate UE beam for uplink communications and downlink communications during the set of multiple time slots.

[0025] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for using the candidate UE beam to monitor a time slot that includes a set of time resources for the channel state information reference signal, wherein the channel state information reference signal may be measured on a symbol of the time slot that is different from a predicted symbol of the set of time resources for the channel state information reference signal.

[0026] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: identifying a set of time resources for a channel state information reference signal based on one or more previous channel state information reference signal configurations; identifying a non-periodic reference signal resource configuration from the one or more previous channel state information reference signal configurations; and determining scheduling information for one or more previous channel state information measurements based on the non-periodic reference signal resource configuration, wherein the set of time resources can be identified based on the scheduling information.

[0027] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for measuring the spectral efficiency for each rank of the candidate UE beam, respectively.

[0028] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for updating the subset based on measuring the channel state information reference signal, additional synchronization signal block measurements, one or more channel state information reference signal measurements using one or more additional candidate UE beams, or any combination thereof.

[0029] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, identifying the subset may include operations, features, components, or instructions for identifying the subset from a set of beam subsets used for the synchronization signal block measurement.

[0030] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the subset of candidate UE beams can be identified based on a reference signal received power measurement of the subset of beams for the set of synchronization signal block measurements.

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the subset of candidate UE beams can be identified based on a channel impulse response measurement of the subset of beams for the set of synchronization signal block measurements.

[0032] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the subset of candidate UE beams may be identified based on an uplink link budget of the UE.

[0033] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the channel state information reference signal may be an acquisition channel state information reference signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 An example of a wireless communication system supporting techniques for beam selection with uplink considerations in accordance with one or more aspects of the present disclosure is illustrated.

[0035] Figure 2 An example of a wireless communication system supporting techniques for beam selection with uplink considerations in accordance with one or more aspects of the present disclosure is illustrated.

[0036] Figure 3 An example of a process flow supporting techniques for beam selection with uplink considerations in accordance with one or more aspects of the present disclosure is illustrated.

[0037] Figure 4 and Figure 5A block diagram of a device supporting techniques for beam selection with uplink considerations in accordance with one or more aspects of the present disclosure is shown.

[0038] Figure 6 A block diagram of a communications manager supporting techniques for beam selection with uplink considerations is shown in accordance with one or more aspects of the present disclosure.

[0039] Figure 7

[0013] A diagram of a system including devices supporting techniques for beam selection with uplink considerations in accordance with one or more aspects of the present disclosure is shown.

[0040] Figures 8 to 10 A flow chart illustrating a method supporting techniques for beam selection with uplink considerations in accordance with one or more aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0041] A wireless communication system may support beamforming communications. For example, a network entity may communicate with a user equipment (UE) using one or more beams from the network entity (e.g., network entity beams), and a UE may communicate with the network entity using one or more beams from the UE (e.g., UE beams). The UE may measure synchronization signal blocks (SSBs) using multiple UE beams and select a serving beam (e.g., the strongest candidate beam) for communicating with the network entity based on the measurements. The UE may also identify candidate UE beams for beam refinement (e.g., for future communications) based on the SSB measurements, and measure channel state information (CSI) reference signals (CSI-RS) using the candidate beams. For example, the UE may identify a set of candidate UE beams based on UE beams with high reference signal received power (RSRP) measurements, high channel impulse response measurements, or both. The UE may select and switch to a second serving beam (e.g., the best candidate beam) based on performing CSI-RS measurements associated with downlink communications using the candidate beam set (e.g., spectral efficiency measurements on resources carrying CSI-RS). However, identifying candidate UE beam sets based on SSB measurements without considering the uplink may result in lower beam performance for uplink communications.

[0042] The present disclosure provides techniques for selecting candidate UE beams for measuring CSI-RS based on uplink communication considerations. For example, the UE may select a set of candidate UE beams for measuring CSI-RS based on one or more power measurements for uplink transmissions. The UE may use the set of candidate UE beams to measure multiple SSBs, and select a subset of the selected candidate beams based on the SSB measurements (e.g., refine, update the list of candidate beams based on high RSRP, channel impulse response, or both). The UE may use a subset of candidate UE beams to measure spectral efficiency via resources carrying CSI-RS, and select a serving beam from the subset based on the spectral efficiency of each beam (e.g., select a beam with the best spectral efficiency). In some cases, the UE may calculate a power measurement based on the difference between a power threshold and a reference power value, wherein the power measurement may include a virtual power headroom (vPHR) value for each candidate beam.

[0043] Aspects of the disclosure are described first in the context of a wireless communication system and then in a process flow.Aspects of the disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow diagrams related to techniques for beam selection with uplink considerations.

[0044] Figure 1 An example of a wireless communication system 100 supporting techniques for beam selection with uplink considerations in accordance with 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.

[0045] 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).

[0046] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile or both stationary and mobile at different times. The UEs 115 may be devices 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 communications with various types of devices, such as Figure 1 Other UEs 115 or network entities 105 are shown.

[0047] 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.

[0048] 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 via the backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols) directly (e.g., directly between the network entities 105) or indirectly (e.g., via the core network 130). In some examples, the network entities 105 may communicate with each other via the midhaul communication links 162 (e.g., according to the midhaul interface protocol) or the fronthaul communication links 168 (e.g., according to the fronthaul interface protocol) or any combination thereof. The backhaul communication links 120, the midhaul communication links 162, or the 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 .

[0049] 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 terminology). 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 that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140).

[0050] 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)).

[0051] The functional split between CU 160, DU 165, and RU 170 is flexible and can support different functions, 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 can be employed between CU 160 and DU 165, such that CU 160 can support one or more layers of a protocol stack and DU 165 can support one or more different layers of a protocol stack. In some examples, CU 160 can host higher protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functions 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) functions 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 may be within a protocol layer (e.g., some functions of a protocol layer may be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer are performed by a different one of CU 160, DU 165, or RU 170). CU 160 may be further functionally split into CU control plane (CU-CP) and CU user plane (CU-UP) functions. CU 160 may be connected to one or more DUs 165 via midhaul communication links 162 (e.g., F1, F1-c, F1-u), and DU 165 may be connected to one or more RUs 170 via fronthaul communication links 168 (e.g., an open fronthaul (FH) interface). In some examples, midhaul communication link 162 or fronthaul communication link 168 may be implemented based on an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 105 that communicate via such communication links.

[0052] 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.

[0053] 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 the techniques for beam selection with uplink considerations 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).

[0054] 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.

[0055] 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.

[0056] 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).

[0057] 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 technology, a resource element may refer to a symbol period (e.g., the duration of a modulation symbol) and a resource of a 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 rate of communication. 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.

[0058] The time interval for the network entity 105 or the UE 115 may be expressed as a multiple of a basic time unit, which may be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, for which 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).

[0059] 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.

[0060] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmit time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0061] According to various techniques, physical channels may be multiplexed using carriers for communication. Physical control channels and physical data channels may be multiplexed for signaling via downlink carriers, for example, using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. 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 .

[0062] 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.

[0063] 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.

[0064] 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 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, the network entity 105 may facilitate scheduling of resources for D2D communication. In some other examples, D2D communications may be performed between UEs 115 without involving network entity 105 .

[0065] 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.

[0066] 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). For example, the region of 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from about 1 decimeter to 1 meter long. 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 lower frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0067] 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 using unlicensed bands may be based on carrier aggregation configuration (e.g., LAA) in conjunction with component carriers operating using licensed bands. Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, and the like.

[0068] 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) communications, 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 may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with 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 may use to support beamforming for communications with the UE 115. Similarly, the UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming for signals sent via the antenna ports.

[0069] 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 some directions 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 antenna element may be defined by a set of beamforming weights associated with a certain orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0070] 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.

[0071] Some signals (such as data signals associated with a receiving device) may be transmitted by a transmitting device (e.g., transmitting network entity 105, transmitting UE 115) along a single beam direction (e.g., a direction associated with a receiving device such as receiving network entity 105 or receiving UE 115). In some examples, a beam direction associated with transmission along a single beam direction may be determined based on signals transmitted along one or more beam directions. For example, UE 115 may receive one or more of the signals transmitted 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.

[0072] 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 reference signals (e.g., cell-specific reference signals (CRS), CSI-RS) that may be precoded or uncoded. 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).

[0073] 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).

[0074] In some examples, UE 115 may use CSI (e.g., rank) for receiver beam selection. In some cases, the CSI-RS may be quasi co-located (QCL) with the configured serving SSB or non-periodic CSI-RS network. If the channel is stable over a time duration, UE 115 may scan candidate UE beams on the CSI-RS and report CSI feedback (CSF) reports based on previous measurements. UE 115 may update the CSF based on the DMRS associated with the channel and channel estimates. In some cases, the CSI-RS may be QCL with a non-serving SSB. UE 115 may scan candidate UE beams on a CSI-RS that is QCL with a non-serving SSB for periodic CSI-RS.

[0075] In some cases, UE beam management may be based on SSB or CSI-RS process three (P3) (e.g., in 5G frequency two (F2)). For example, SSB may be described as a rank-1 periodic reference signal that is guaranteed to be sent (e.g., by all underlying vendors). However, UE beam selection based on SSB is limited in the metrics that it can optimize due to its rank-1 nature. For example, mathematically, SSB may not be used to optimize rank-2 performance. CSI-RS P3 may be an optional reference signal that may be configured differently across networks.

[0076] In some implementations, the UE 115 may select a beam for measuring CSI-RS based on uplink communication considerations, which may result in more efficient selection of UE beams for uplink performance and a selection procedure compatible with multiple types of CSI-RS beam scheduling (e.g., CSF, CSI-RS for acquisition, CSI-RS P3, etc.). For example, the UE 115 may select a set of candidate UE beams for measuring CSI-RS based on one or more power measurements for uplink transmissions. The UE 115 may measure multiple SSBs using the set of candidate UE beams and select a subset of the selected candidate beams based on the SSB measurements (e.g., refine, update the list of candidate beams based on high RSRP, channel impulse response, or both). The UE 115 may measure spectral efficiency via resources carrying CSI-RS using the subset of candidate UE beams and select a serving beam from the subset based on the spectral efficiency of each beam (e.g., select a beam with the best spectral efficiency). In some cases, UE 115 may calculate a power measurement based on a difference between the power threshold and a reference power value, where the power measurement may include a vPHR value for each candidate beam.

[0077] Figure 2 An example of a wireless communication system 200 supporting techniques for beam selection with uplink considerations according to one or more aspects of the present disclosure is illustrated. The wireless communication system 200 may implement aspects of the wireless communication system 100 or may be an example thereof. The wireless communication system 200 may include a UE 215 and a network entity 205, which may be as described in reference Figure 1 Corresponding examples of UE 115 and network entity 105 are described.

[0078] The wireless communication system 200 may support beamforming communications. For example, the network entity 205 may use one or more network entity beams 210 to communicate with the UE 215, and the UE 215 may use one or more UE beams 220 to communicate with the network entity 205. For example, the network entity beams 210 may include network entity beams 210-a, network entity beams 210-b, and network entity beams 210-c.

[0079] UE 215 may measure SSBs using multiple UE beams 220 and select a beam as a serving UE beam based on the measurements. For example, UE 215 may measure SSBs using at least UE beam 220-a, UE beam 220-b, and UE beam 220-c (e.g., candidate UE beams). In one example, UE 215 may select UE beam 220-b as a serving UE beam based on UE beam 220-b having the highest RSRP measurement on the corresponding SSB. The serving UE beam may, for example, be used to receive or transmit on a PDCCH, PDSCH, physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), or random access channel (RACH) message (e.g., RACH message 3), or any combination thereof. For example, a serving UE beam may be selected for control or data signaling to or from network entity 205.

[0080] UE 215 may be configured to measure CSI-RS (e.g., for acquisition, for P3) using a candidate UE beam from a beam set for serving SSB measurements. In some cases, UE 215 may receive control signaling from network entity 205 that configures UE 215 to perform CSI-RS measurements associated with downlink communications (e.g., spectral efficiency measurements) using candidate UE beams and to select a serving beam based on the downlink measurements. However, identifying a candidate beam set based on SSB measurements without considering the uplink may result in lower beam performance for uplink communications. For example, due to a potential rank mismatch between uplink and downlink communications, a UE beam selected based on spectral efficiency measurements without considering the uplink may be suitable for downlink communications (e.g., optimal for it), but may not be the best beam (e.g., optimal beam) for uplink communications. Therefore, a selection procedure that considers both uplink and downlink performance may result in more efficient combined communications between uplink and downlink channels.

[0081] In some implementations, UE 215 may select candidate UE beam set 225 based on uplink considerations. For example, UE 215 may calculate a power measurement associated with uplink transmissions for each candidate UE beam. Based on the power measurement, candidate UE beam set 225 may include, for example, UE beam 220-a, UE beam 220-b, and UE beam 220-c.

[0082] In some cases, the power measurement may be a vPHR measurement. The vPHR may indicate a power headroom value for reference full resource block PUSCH transmissions on each port (e.g., each antenna port) of the UE 215. For example, the power headroom may indicate how much transmit power the UE 215 can use without exceeding a power threshold in addition to the power already utilized (e.g., the power used by ongoing transmissions). In some cases, the power threshold may be a maximum transmit power limit (MTPL). In some cases, the vPHR may be different from the actual power headroom of the UE 215.

[0083] UE 215 may calculate vPHR based on the difference between the power threshold (e.g., MTPL) and the reference power value. For example, vPHR may be calculated using:

[0084] Equation 1: in Indicates the reference requested power (e.g., reference power value) for channel transmission. MTPL and The following can be used to calculate:

[0085] Equation 2: MTPL = P bump -PMRP-MPR

[0086] Equation 3: Where P bump represents a transmit power value (e.g., absolute transmit power, static power), PMRP (Power Management-Maximum Power Reduction) represents a first power reduction value (e.g., power reduction due to Maximum Power Exposure (MPE) limitation, dynamic power), and MPR (Maximum Power Reduction) represents a second power reduction value (e.g., power backoff due to waveform type, modulation, semi-static power); and P0 PUSCH represents an uplink channel value (e.g., configured by the network entity 205), PL represents a path loss value of the beam, f represents a frequency associated with a transmit power control (TPC) group (e.g., filtered and quantized), N RB represents the maximum transmission bandwidth (e.g., the number of resource blocks, full resource blocks), and N carrier Indicates the number of carriers (eg, all active carriers).

[0087] In some implementations, the UE 215 may determine the number of UE beams of the candidate beam set 225 based on the power measurement. For example, the UE 215 may set a UE beam threshold (e.g., a limit). The UE beam threshold may be associated with a ratio between a UE beam with the best RSRP and another UE beam. For example, the UE 215 may determine that the UE beam 220-b may have the highest measured RSRP of the UE beam set for serving SSB measurements. For example, if the UE 215 is relatively close to the network entity 205 (P0 PUSCH is configured to be low), the path loss of UE beam 220-b may be relatively small, and UE 215 may set the UE beam threshold to a relatively large value (e.g., six decibels (dB)). For example, if UE 215 is relatively far away from network entity 205 (e.g., edge cell scenario) (e.g., P0 PUSCH is configured to be high), the path loss of UE beam 220-b may be relatively large, and UE 215 may set the UE beam threshold to a relatively small value (e.g., one decibel (dB)). UE 215 may include all UE beams within the candidate UE beam set 225 that are below UE beam 220-b within the UE beam threshold (e.g., 6 dB or 1 dB) (e.g., such that the vPHR values ​​of all beams in the candidate UE beam set 225 are positive). In some cases, the UE beam threshold may be zero, such that the only beam within the candidate UE beam set 225 is the UE beam with the best RSRP (e.g., UE beam 220-b). Although UE beam 220-b is used with UE beam thresholds of 6 dB and 1 dB (as examples), other values ​​are also possible. The UE beam threshold may be any value such that the vPHR of all beams within the candidate UE beam set 225 are positive.

[0088] UE 215 may select (or identify from) a subset of candidate UE beams for measuring CSI-RS based on the beam set used for serving SSB measurements. For example, UE 215 may measure the SSB of each beam of candidate UE beam set 225. UE 215 may select the top K beams from the SSB measurements to be included in candidate UE beam subset 230. In some cases, the top K beams may be determined based on the highest RSRP measurement, the channel impulse response measurement, or both. Additionally or alternatively, the top K beams may be identified based on a previous CSI-RS measurement. For example, UE 215 may update or select candidate UE beam subset 230 based on a previous CSI-RS measurement using a previous serving UE beam or a previous candidate UE beam. In some examples, candidate UE beam subset 230 may include UE beam 220-b and UE beam 220-c.

[0089] In some cases, the UE 215 may measure the spectral efficiency on the resources carrying the CSI-RS. In some cases, the spectral efficiency may be measured separately for each rank. In some cases, the UE 215 may perform filtering, biasing, or thresholding for the first rank and the second rank of the CSI-RS measurement. In some cases, the CSI-RS may be a CSI-RS for cell acquisition, a CSI-RS P3, or any other type of CSI-RS.

[0090] UE 215 may prepare a report to network entity 205, including the last measurement on the serving UE beam (e.g., UE beam 220-b) or the most recent measurement (e.g., spectral efficiency measurement) of a candidate UE beam (e.g., UE beam 220-c). In some cases, the report may be generated based on or include information about both the most recent measurement for the serving UE beam and the measurement for one or more candidate UE beams. UE 215 may then send the report to network entity 205. UE 215 or network entity 205 or both may process the measured spectral efficiency for serving beam selection. In some cases, the measured spectral efficiency may be processed to update or reselect the serving UE beam. In some examples, network entity 205 may update network entity beam 210 or update the configuration for the beam pair link based on the measured spectral efficiency.

[0091] In some examples, UE 215 may scan UE beam 220 to measure CSI-RS using different UE candidate beams at multiple occasions. For example, at a first occasion, UE 215 may measure a first CSI-RS using UE beam 220-a (e.g., a candidate UE beam), then measure a second CSI-RS using UE beam 220-b (e.g., a serving UE beam), and then measure a third CSI-RS using UE beam 220-c (e.g., another candidate UE beam). These techniques may provide enhanced beam selection, which may result in selection of a stronger beam and greater throughput.

[0092] In some cases, the UE 215 may identify the time slot and symbol where the resources for the CSI-RS are to be scheduled. In some wireless communication systems, the UE 115 may identify the time slot and symbol based on the PDCCH in the same time slot as the resources for the CSI-RS. However, the UE 115 in these systems may not have enough time to both process the PDCCH indicating the CSI-RS and switch to the candidate UE beam (e.g., from the serving UE beam).

[0093] UE 215 may implement techniques for predicting time slots and symbols of resources for CSI-RS to support measuring CSI-RS using candidate UE beams. For example, UE 215 may estimate time slots or symbols or both for CSI-RS based on past scheduled non-periodic resources or CSI-RS configurations or both. UE 215 may schedule a candidate UE beam (e.g., UE beam 220-a or UE beam 220-c) or a serving UE beam (e.g., UE beam 220-b) for at least the identified symbol during the identified time slot. This may enable UE 215 to measure CSI-RS using a candidate UE beam without waiting for processing the PDCCH, because once the PDCCH is processed, the resources carrying the CSI-RS may have already appeared.

[0094] In some cases, when the UE beam 220 is scheduled for a CSI-RS symbol, the UE 215 may schedule the UE beam 220 for the entire time slot. In some examples, there may be a PDCCH and a PDSCH in the same time slot. The PDSCH may be frequency division multiplexed on the same symbol as the CSI-RS. Using the same beam throughout the time slot may provide better channel estimation using the PDSCH DMRS that may be on another symbol of the same time slot. If the CSI-RS time slot prediction is inaccurate (e.g., due to scheduling changes at the network entity 205), the UE 215 may use the same beam for multiple time slots in a time window around the predicted time slot.

[0095] Some time slots may include DMRS resources, which can be used to send downlink data grants aperiodically. Downlink grants may be sent aperiodically because the scheduled data may often be aperiodic. The network may indicate the presence of PDSCH and DMRS symbols through downlink control information on the PDCCH symbol K0 time slot before the PDSCH. Some systems may use K0=0, where the PDCCH resources and PDSCH resources are in the same time slot. Information for PDSCH and DMRS may be indicated by scheduling downlink control information. In some cases, if the PDSCH grant is rank-2, the DMRS may also be rank-2.

[0096] In some examples, similar techniques may be used to scan UE beams 220 on PDSCH time slots and measure spectral efficiency or SNR on DMRS sent during PDSCH time slots. For example, UE 215 may identify a set of candidate beams and select a serving UE beam. UE 215 may count the number of downlink grants with DMRS and switch from the serving UE beam to the candidate UE beam after reaching a threshold number of downlink grants with DMRS. In some cases, UE 215 may switch to a candidate UE beam for all channels of one or more time slots. UE 215 may perform SNR or spectral efficiency measurements based on DMRS received using the candidate UE beam. UE 215 may send a measurement report to network entity 205 indicating a measurement based on the last DMRS received using the UE serving beam (e.g., the last SNR or spectral efficiency measurement) or one or more measurements based on the DMRS received using the candidate UE beam, or both. In some cases, some techniques or aspects for measuring CSI-RS using a candidate UE beam may be implemented to measure DMRS using a candidate UE beam.

[0097] Figure 3 An example of a process flow 300 supporting techniques for beam selection with uplink considerations in accordance with one or more aspects of the present disclosure is illustrated. The process flow 300 may include a UE 315 and a network entity 305, which may be as described in reference Figure 1 Corresponding examples of UE 115 and network entity 105 are described.

[0098] The network entity 305 may periodically send SSBs. The SSBs may be measured by a UE 115 (such as UE 315) within the coverage area of ​​the network entity 305 to synchronize with the network entity 305 or select a serving beam. The UE 315 may perform a set of SSB measurements at 310. For example, the UE 315 may measure different SSBs to identify a strong UE beam, a network entity beam, or a beam pair link. The SSBs may have a one-to-one mapping to different network entity beams of the network entity 305. Thus, the UE 315 may measure multiple different beams. In some cases, the UE 315 may measure RSRP, a channel impulse response, or another characteristic of the SSB.

[0099] At 320, the UE 315 may optionally select a serving UE beam. For example, the UE 315 may select a UE beam associated with the SSB having the highest RSRP measurement in the set of SSB measurements for the serving UE beam. The serving UE beam may be used to receive or transmit on a PDCCH, PDSCH, PUCCH, PUSCH, RACH message, or any combination thereof. In some cases, the UE 315 may select a serving UE beam for control signaling, data signaling, or both on an uplink, downlink, or both channels (e.g., to or from the network entity 305).

[0100] At 325, UE 315 may calculate one or more power measurements. For example, UE 315 may calculate a reference power value associated with each candidate beam based on a combination of uplink channel values, path loss values, frequency, and bandwidth values, as described herein with reference to Figure 2 UE 315 may calculate a power threshold associated with each candidate beam based on the difference between the transmit power value, the first power reduction value, and the second power reduction value, as described in reference to Figure 2 UE315 may calculate a corresponding power measurement for each candidate beam based on the difference between the power threshold and the reference power value, as described in reference to Figure 2 As described by Equation 1. In some cases, the power measurement may be an example of a vPHR value for each candidate UE.

[0101] At 330, UE 315 may select a set of candidate UE beams for measuring CSI-RS from the candidate UE beams. For example, UE 315 may determine a threshold based on a power measurement for each UE beam. The threshold may indicate a threshold lower than the serving beam (e.g., X dB lower than the serving beam in terms of SSB RSRP). All beams that meet the threshold (e.g., higher than the threshold, the same as the threshold) may be selected for the set of candidate UE beams. In some cases, UE 315 may determine the threshold based on a vPHR power measurement including a positive value (e.g., a value greater than zero) in the set of candidate UE beams.

[0102] The UE 315 may select a candidate UE beam subset for measuring CSI-RS from the set of candidate UE beams based on the set of SSB measurements. For example, the UE 315 may select the set of candidate UE beams based on RSRP measurements of the set of beams for the set of SSB measurements. For example, the top K UE beams based on RSRP measurements, channel impulse response measurements, or other types of measurements may be selected for the candidate UE beam subset.

[0103] At 335, the UE 315 may optionally identify a set of time resources for the CSI-RS based on one or more previous CSI-RS configurations. In some cases, the UE 315 may predict a set of time resources based on one or more previous CSI-RS configurations. For example, the UE 315 may predict when the CSI-RS will be sent (e.g., in which time slot or in which symbol of the time slot) in order to provide sufficient time to switch from the serving UE beam to the candidate UE beam. The CSI-RS may be sent in a time slot with a PDCCH indicating scheduling information for the CSI-RS. However, if the UE 315 waits to identify scheduling information based on the PDCCH, once the PDCCH is processed, the resources for the CSI-RS may have passed. Therefore, the UE 315 may predict when the CSI-RS will be sent in order to measure the CSI-RS using the UE candidate beam.

[0104] At 330, UE 315 may monitor the downlink channel during at least the identified set of time resources using the candidate UE beam. At 345, network entity 305 may send a CSI-RS to UE 315. UE 315 may measure the CSI-RS based on the set of time resources using a candidate UE beam from the subset of candidate UE beams.

[0105] In some cases, UE 315 may use the candidate UE beam to monitor the time slot including the identified set of time resources. For example, UE 315 may use the candidate UE beam to communicate throughout the time slot to provide a higher probability of measuring the CSI-RS using the candidate UE beam. In some examples, UE 315 may use the candidate UE beam for a set of multiple time slots based on a time window around the set of time resources, where the CSI-RS is measured during at least one symbol in the set of multiple time slots. For example, UE 315 may use the candidate UE beam for multiple time slots for which UE 315 detects a scheduling change at network entity 305.

[0106] In some cases, if the UE 315 incorrectly predicts the time resource, the UE 315 may use the candidate UE beam for a slightly longer period across instances. For example, the UE 315 may first perform symbol-based switching and attempt to switch from the serving UE beam to the candidate UE beam only for the predicted symbols carrying the CSI-RS. If the UE 315 predicts the symbol wrong, the UE 315 may perform slot-based switching and use the candidate UE beam for the full slot at the next instance. If the predicted slot for slot-based switching is wrong, the UE 315 may use the candidate UE beam for a set of multiple slots according to a window around the predicted slot.

[0107] In some examples, the UE candidate beam subset may be selected or updated based on a previous CSI-RS measurement. For example, UE 315 may update the candidate UE beam set based on measuring CSI-RS, additional SSB measurements, one or more CSI-RS measurements using one or more additional candidate UE beams, or any combination thereof.

[0108] In some examples, the network entity 305 and the UE 315 may implement techniques for measuring PDSCH DMRS using a candidate UE beam or performing UE beam scanning for PDSCH DMRS. In some cases, the techniques for UE beam scanning for PDSCH DMRS may be similar to some of the techniques used in the beam selection process flow 300 for acquiring resources using CSI-RS. For example, at 310, the UE 315 may calculate power measurements, perform a set of SSB measurements, and select a serving UE beam and a subset of candidate UE beams based on the SSB measurements. The UE 315 may communicate with the network entity 305 and receive a threshold number of downlink grants with DMRS using the serving UE beam.

[0109] Once UE 315 receives a threshold number of downlink grants with DMRS, UE 315 may switch to a candidate UE beam from a subset of candidate UE beams. For example, at 340, UE 315 may monitor one or more wireless channels of a time slot using a candidate UE beam from a subset of candidate UE beams based on receiving a threshold number of downlink grants. For example, UE 315 may monitor PDSCH DMRS using the selected candidate UE beam for all channels of one or more time slots. At 350, network entity 305 may send DMRS on the PDSCH resource of the time slot. UE 315 may measure one or more DMRS sent on one or more wireless channels of the time slot using the candidate UE beam. Then similar to 355, UE 315 may send a measurement report to the network entity based on measuring one or more DMRS using the candidate UE beam or using the last measurement of the serving UE beam or both. For example, the measurement report may include an SNR or spectral efficiency measurement made using the candidate UE beam or a previous SNR or spectral efficiency measurement made using the serving UE beam or any combination thereof.

[0110] In some examples, UE 315 may process the measurement of the CSI-RS, such as for the purpose of serving beam selection. For example, UE 315 may process the measured spectral efficiency for the purpose of serving beam selection. For example, at 360, UE 315 may perform filtering, biasing, or thresholding for the measured first rank and the second rank as part of reselecting the serving beam. In some cases, UE 315 may select a serving beam based on the measured, filtered, or biased spectral efficiency of the candidate beam (e.g., reselect the serving beam to a candidate UE beam from the group of candidate UE beams).

[0111] Figure 4 A block diagram 400 of a device 405 supporting techniques for beam selection with uplink considerations according to one or more aspects of the present disclosure is shown. The device 405 may be an example of aspects of a 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).

[0112] 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 techniques for utilizing beam selection for uplink considerations). The information may be communicated to other components of device 405. Receiver 410 may utilize a single antenna or a collection of multiple antennas.

[0113] Transmitter 415 may provide means for transmitting signals generated by other components of device 405. For example, transmitter 415 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to techniques for utilizing beam selection for uplink considerations). In some examples, transmitter 415 may be co-located with receiver 410 in a transceiver component. Transmitter 415 may utilize a single antenna or a collection of multiple antennas.

[0114] 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 aspects of the techniques for beam selection with uplink considerations 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.

[0115] 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 (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof that is configured to 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).

[0116] 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 performed by a general purpose processor (e.g., configured as or otherwise supporting components for performing the functions described in the present disclosure), a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices.

[0117] 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.

[0118] 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 measuring a set of SSBs. The communication manager 420 may be configured to or otherwise support components for selecting a set of candidate beams for measuring CSI-RS based at least in part on power measurements associated with uplink performance. The communication manager 420 may be configured to or otherwise support components for selecting a subset of candidate beams for measuring CSI-RS based on a set of SSB measurements. The communication manager 420 may be configured to or otherwise support components for measuring spectral efficiency using a first candidate beam from a subset of the candidate beam set based on the CSI-RS. The communication manager 420 may be configured to or otherwise support components for sending spectral efficiency measurements to a network entity based on measuring spectral efficiency using a candidate UE beam.

[0119] By including or configuring a communications manager 420 according to examples as described herein, the device 405 (e.g., a processor controlling the receiver 410, the transmitter 415, the communications manager 420, or a combination thereof or otherwise coupled thereto) may support techniques for increased uplink performance, more efficient selection of beams for uplink communications, and more efficient utilization of communications resources.

[0120] Figure 5 A block diagram 500 of a device 505 supporting techniques for beam selection with uplink considerations 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).

[0121] 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 techniques for utilizing beam selection for uplink considerations). 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.

[0122] 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 (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 techniques for utilizing beam selection for uplink considerations). In some examples, the transmitter 515 may be co-located with the receiver 510 in a transceiver component. The transmitter 515 may utilize a single antenna or a collection of multiple antennas.

[0123] The device 505 or its various components may be examples of components for performing various aspects of the techniques for beam selection with uplink considerations as described herein. For example, the communication manager 520 may include an SSB component 525, a beam selector component 530, a spectral efficiency component 535, a reporter component 540, 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 perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with the receiver 510, the transmitter 515, or both. For example, the communication manager 520 may receive information from the receiver 510, transmit information to the transmitter 515, or be integrated in combination with the receiver 510, the transmitter 515, or both to obtain information, output information, or perform various other operations as described herein.

[0124] According to examples as disclosed herein, the communication manager 520 may support wireless communications at the UE. The SSB component 525 may be configured to or otherwise support components for measuring a set of SSBs. The beam selector component 530 may be configured to or otherwise support components for selecting a set of candidate beams for measuring CSI-RS based at least in part on power measurements associated with uplink performance. The beam selector component 530 may be configured to or otherwise support components for selecting a subset of candidate beams for measuring CSI-RS based on a set of SSB measurements. The spectral efficiency component 535 may be configured to or otherwise support components for measuring spectral efficiency using a first candidate beam from a subset of the candidate beam set based on the CSI-RS. The reporter component 540 may be configured to or otherwise support components for sending spectral efficiency measurements to a network entity based on measuring spectral efficiency using candidate UE beams.

[0125] Figure 6A block diagram 600 of a communication manager 620 supporting techniques for beam selection with uplink considerations is shown in accordance with one or more aspects of the present disclosure. 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 aspects of the techniques for beam selection with uplink considerations as described herein. For example, the communication manager 620 may include an SSB component 625, a beam selector component 630, a spectral efficiency component 635, a reporter component 640, a power measurement component 645, a predictor component 650, a time slot component 655, a reference signal component 660, a scheduler component 665, a communicator component 670, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses).

[0126] According to examples as disclosed herein, the communication manager 620 may support wireless communications at the UE. The SSB component 625 may be configured to or otherwise support components for measuring a set of SSBs. The beam selector component 630 may be configured to or otherwise support components for selecting a set of candidate beams for measuring CSI-RS based at least in part on power measurements associated with uplink performance. In some examples, the beam selector component 630 may be configured to or otherwise support components for selecting a subset of candidate beams for measuring CSI-RS based on a set of SSB measurements. The spectral efficiency component 635 may be configured to or otherwise support components for measuring spectral efficiency using a first candidate beam from a subset of the candidate beam set based on the CSI-RS. The reporter component 640 may be configured to or otherwise support components for sending spectral efficiency measurements to a network entity based on measuring spectral efficiency using candidate UE beams.

[0127] In some examples, power measurement component 645 can be configured or otherwise support components for calculating a power measurement based on a difference between a power threshold and a reference power value. In some examples, beam selector component 630 can be configured or otherwise support components for determining a number of UE beams for a candidate UE beam set based on the calculated power measurement.

[0128] In some examples, power measurement component 645 can be configured or otherwise supported for calculating a power threshold based on a difference between a transmit power value, a first power reduction value, and a second power reduction value, where the power threshold is a component of the MTPL.

[0129] In some examples, the power measurement component 645 may be configured or otherwise supported for calculating a reference power value based on a combination of uplink channel values, path loss values, frequency, and bandwidth values, where the reference power value is a component of a reference requested power.

[0130] In some examples, the bandwidth value includes a maximum transmit bandwidth and a number of carriers.

[0131] In some examples, the power measurement includes one or more vPHR values ​​associated with corresponding beams of the candidate UE beam set.

[0132] In some examples, selection of a candidate UE beam set is based on a power measurement being positive.

[0133] In some examples, beam selector component 630 may be configured or otherwise support components for selecting a serving UE beam for measuring CSI-RS based on a set of SSB measurements. In some examples, reporter component 640 may be configured or otherwise support components for generating a measurement report based on a spectral efficiency measurement and a last CSI-RS measurement on a serving UE beam.

[0134] In some examples, beam selector component 630 may be configured as or otherwise support components for reselecting a serving UE beam based on measuring CSI-RS.

[0135] In some examples, to support reselection of a served UE beam, the beam selector component 630 may be configured as or otherwise support components for performing filtering, biasing, thresholding, or any combination thereof for a first rank and a second rank of measurements of the CSI-RS, wherein reselection of the served UE beam is based on filtering, biasing, thresholding, or any combination thereof.

[0136] In some examples, predictor component 650 may be configured or otherwise support means for predicting a set of temporal resources for a CSI-RS based on one or more previous CSI-RS configurations.

[0137] In some examples, the time slot component 655 can be configured to or otherwise support components for determining a time slot format for a time slot including a set of time resources for a CSI-RS, wherein the time slot format includes at least one downlink shared channel resource. In some examples, the time slot component 655 can be configured to or otherwise support components for monitoring a time slot using a candidate UE beam based on determining the time slot format, wherein the CSI-RS is measured based on the monitored time slot.

[0138] In some examples, reference signal component 660 may be configured or otherwise support components for measuring a demodulation reference signal on at least one downlink shared channel resource using a candidate UE beam. In some examples, reference signal component 660 may be configured or otherwise support components for performing channel estimation for a time slot based on measuring the demodulation reference signal.

[0139] In some examples, the reference signal component 660 may be configured to or otherwise support components for using a candidate UE beam for a set of multiple time slots based on a time window around a set of time resources for a CSI-RS, where the CSI-RS is measured during at least one symbol in the set of multiple time slots.

[0140] In some examples, scheduler component 665 may be configured as or otherwise support components for determining a scheduling change for a network entity, wherein a candidate UE beam is used for a set of multiple time slots based on the scheduling change.

[0141] In some examples, to support use of candidate UE beams for a set of multiple time slots, communicator component 670 may be configured as or otherwise support components for using candidate UE beams for uplink communications and downlink communications during a set of multiple time slots.

[0142] In some examples, the time slot component 655 may be configured or otherwise support components for monitoring a time slot including a set of time resources for a CSI-RS using a candidate UE beam, where the CSI-RS is measured on symbols of the time slot that are different from predicted symbols of the CSI-RS for the set of time resources.

[0143] In some examples, the predictor component 650 may be configured or otherwise support components for identifying a set of time resources for a CSI-RS based on one or more previous CSI-RS configurations. In some examples, the reference signal component 660 may be configured or otherwise support components for identifying an aperiodic reference signal resource configuration from one or more previous CSI-RS configurations. In some examples, the scheduler component 665 may be configured or otherwise support components for determining scheduling information for one or more previous channel state information measurements based on the aperiodic reference signal resource configuration, wherein the set of time resources is identified based on the scheduling information.

[0144] In some examples, spectral efficiency component 635 may be configured or otherwise support components for measuring spectral efficiency separately for each rank of candidate UE beams.

[0145] In some examples, beam selector component 630 may be configured or otherwise support components for updating a subset based on measuring the CSI-RS, additional SSB measurements, one or more CSI-RS measurements using one or more additional candidate UE beams, or any combination thereof.

[0146] In some examples, to support identifying subsets, beam selector component 630 may be configured or otherwise support components for identifying a subset from a set of beam subsets for SSB measurements.

[0147] In some examples, a subset of candidate UE beams are identified based on reference signal received power measurements of a subset of beams in a set for SSB measurements.

[0148] In some examples, a subset of candidate UE beams are identified based on channel impulse response measurements of a subset of beams in a set for SSB measurements.

[0149] In some examples, a subset of candidate UE beams is identified based on the UE's uplink link budget.

[0150] In some examples, the CSI-RS is an acquired CSI-RS.

[0151] Figure 7 A diagram of a system 700 including a device 705 supporting techniques for beam selection with uplink considerations 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).

[0152] 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.

[0153] 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 for 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.

[0154] 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.

[0155] The processor 740 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, 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 cause the device 705 to perform various functions (e.g., functions or tasks that support techniques for beam selection that utilize uplink considerations). 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.

[0156] According to the examples disclosed herein, the communication manager 720 may support wireless communications at the UE. For example, the communication manager 720 may be configured to or otherwise support a component for measuring a set of SSBs. The communication manager 720 may be configured to or otherwise support a component for selecting a set of candidate beams for measuring CSI-RS based at least in part on a power measurement associated with uplink performance. The communication manager 720 may be configured to or otherwise support a component for selecting a subset of candidate beams for measuring CSI-RS based on a set of SSB measurements. The communication manager 720 may be configured to or otherwise support a component for measuring spectral efficiency using a first candidate beam from a subset of the candidate beam set based on the CSI-RS. The communication manager 720 may be configured to or otherwise support a component for sending a spectral efficiency measurement to a network entity based on measuring spectral efficiency using a candidate UE beam.

[0157] By including or configuring a communication manager 720 according to examples as described herein, the device 705 can support techniques for increased uplink performance, more efficient selection of beams for uplink communications, and more efficient utilization of communication resources.

[0158] 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. 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 executable by the processor 740 to cause the device 705 to perform various aspects of the techniques for beam selection with uplink considerations as described herein, or the processor 740 and the memory 730 may be otherwise configured to perform or support such operations.

[0159] Figure 8 A flow chart illustrating a method 800 for supporting techniques for beam selection utilizing uplink considerations according to one or more aspects of the present disclosure is shown. The operations of the method 800 may be implemented by a UE or components thereof as described herein. For example, the operations of the method 800 may be implemented by a UE or components thereof as described herein. Figures 1 to 7 The described UE 115 performs. 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.

[0160] At 805, the method may include measuring the SSB set. The operations of 805 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 805 may be performed as described in reference to Figure 6 The SSB component 625 is executed.

[0161] At 810, the method may include selecting a set of candidate beams for measuring CSI-RS based at least in part on a power measurement associated with uplink performance. The operations of 810 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 810 may be performed as described in reference to Figure 6 The beam selector component 630 is used to perform the above.

[0162] At 815, the method may include selecting a subset of candidate beams for measuring CSI-RS based on the set of SSB measurements. The operations of 815 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 815 may be performed as described in reference to Figure 6 The beam selector component 630 is used to perform the above.

[0163] At 820, the method may include measuring spectral efficiency using a first candidate beam from a subset of the candidate beam set based on the CSI-RS. The operations of 820 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 820 may be performed as described in reference to Figure 6 The spectral efficiency component 635 is used to perform the above.

[0164] At 825, the method may include sending a spectral efficiency measurement to a network entity based on measuring spectral efficiency using a candidate UE beam. The operations of 825 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 825 may be performed as described in reference to Figure 6 The reporter component 640 is used to execute.

[0165] Fig. 9 A flow chart illustrating a method 900 for supporting techniques for beam selection utilizing uplink considerations according to one or more aspects of the present disclosure is shown. The operations of the method 900 may be implemented by a UE or components thereof as described herein. For example, the operations of the method 900 may be implemented by a UE or components thereof as described herein. Figures 1 to 7 The described UE 115 performs. 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.

[0166] At 905, the method may include measuring the SSB set. The operations of 905 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 905 may be performed as described in reference to Figure 6 The SSB component 625 is executed.

[0167] At 910, the method may include calculating a power measurement based on a difference between a power threshold and a reference power value. The operations of 910 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 910 may be performed by reference to Figure 6 The power measurement component 645 is used to perform the above operation.

[0168] At 915, the method may include determining a number of UE beams for a candidate UE beam set based on the calculated power measurement. The operations of 915 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 915 may be performed as described in reference to Figure 6 The beam selector component 630 is used to perform the above.

[0169] At 920, the method may include selecting a set of candidate beams for measuring CSI-RS based at least in part on a power measurement associated with uplink performance. The operations of 920 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 920 may be performed as described in reference to Figure 6 The beam selector component 630 is used to perform the above.

[0170] At 925, the method may include selecting a subset of candidate beams for measuring CSI-RS based on the set of SSB measurements. The operations of 925 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 925 may be performed as described in reference to Figure 6 The beam selector component 630 is used to perform the above.

[0171] At 930, the method may include measuring spectral efficiency using a first candidate beam from a subset of the candidate beam set based on the CSI-RS. The operations of 930 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 930 may be performed as described in reference to Figure 6 The spectral efficiency component 635 is used to perform the above.

[0172] At 935, the method may include sending a spectral efficiency measurement to a network entity based on measuring spectral efficiency using a candidate UE beam. The operations of 935 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 935 may be performed as described in reference to Figure 6 The reporter component 640 is used to execute.

[0173] Fig.10 A flow chart illustrating a method 1000 for supporting techniques for beam selection utilizing uplink considerations according to one or more aspects of the present disclosure is shown. The operations of the method 1000 may be implemented by a UE or components thereof as described herein. For example, the operations of the method 1000 may be implemented by a UE or components thereof as described herein. Figures 1 to 7 The described UE 115 performs. 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.

[0174] At 1005, the method may include measuring the SSB set. The operations of 1005 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1005 may be performed as described in reference to Figure 6 The SSB component 625 is executed.

[0175] At 1010, the method may include selecting a set of candidate beams for measuring CSI-RS based at least in part on a power measurement associated with uplink performance. The operations of 1010 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1010 may be performed as described in reference to Figure 6 The beam selector component 630 is used to perform the above.

[0176] At 1015, the method may include selecting a subset of candidate beams for measuring CSI-RS based on the set of SSB measurements. The operations of 1015 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1015 may be performed as described in reference to Figure 6 The beam selector component 630 is used to perform the above.

[0177] At 1020, the method may include measuring spectral efficiency using a first candidate beam from a subset of the candidate beam set based on the CSI-RS. The operations of 1020 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1020 may be performed as described in reference to Figure 6 The spectral efficiency component 635 is used to perform the above.

[0178] At 1025, the method may include selecting a serving UE beam for measuring CSI-RS based on the set of SSB measurements. The operations of 1025 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1025 may be performed as described in reference to Figure 6 The beam selector component 630 is used to perform the above.

[0179] At 1030, the method may include generating a measurement report based on the spectral efficiency measurement and the last CSI-RS measurement on the serving UE beam. The operations of 1030 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1030 may be performed as described in reference to Figure 6 The reporter component 640 is used to execute.

[0180] At 1035, the method may include sending a spectral efficiency measurement to a network entity based on measuring spectral efficiency using the candidate UE beam. The operations of 1035 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1035 may be performed as described in reference to Figure 6 The reporter component 640 is used to execute.

[0181] The following provides an overview of various aspects of the disclosure:

[0182] Aspect 1: A method for performing wireless communications at a UE, the method comprising: measuring a set of synchronization signal blocks; selecting a set of candidate beams for measuring a channel state information reference signal based at least in part on a power measurement associated with uplink performance; selecting a subset of the candidate beams for measuring the channel state information reference signal based at least in part on the set of synchronization signal block measurements; measuring spectral efficiency using a first candidate beam from the subset of the candidate beam set based at least in part on the channel state information reference signal; and sending a spectral efficiency measurement to a network entity based at least in part on measuring the spectral efficiency using a candidate UE beam.

[0183] Aspect 2: According to the method described in Aspect 1, the method also includes: calculating the power measurement based at least in part on the difference between the power threshold and the reference power value; and determining the number of UE beams for the candidate UE beam set based at least in part on the calculated power measurement.

[0184] Aspect 3: The method according to aspect 2 further comprises: calculating the power threshold based at least in part on the difference between the transmit power value, the first power reduction value and the second power reduction value, wherein the power threshold is a maximum transmit power limit.

[0185] Aspect 4: According to the method described in any one of Aspects 2 to 3, the method further includes: calculating the reference power value based at least in part on a combination of an uplink channel value, a path loss value, a frequency and a bandwidth value, wherein the reference power value is a reference requested power.

[0186] Aspect 5: The method according to aspect 4, wherein the bandwidth value includes a maximum transmission bandwidth and a number of carriers.

[0187] Aspect 6: A method according to any one of aspects 1 to 5, wherein the power measurement includes one or more virtual power headroom values ​​associated with corresponding beams of the candidate UE beam set.

[0188] Aspect 7: A method according to any one of aspects 1 to 6, wherein selecting the candidate UE beam set is at least partly based on the power measurement being positive.

[0189] Aspect 8: According to the method described in any one of Aspects 1 to 7, the method also includes: selecting a serving UE beam for measuring the channel state information reference signal based at least in part on the set of synchronization signal block measurements; and generating a measurement report based at least in part on the spectral efficiency measurement and the last channel state information reference signal measurement on the serving UE beam.

[0190] Aspect 9: According to the method according to aspect 8, the method also includes: reselecting the serving UE beam based at least in part on measuring the channel state information reference signal.

[0191] Aspect 10: A method according to Aspect 9, wherein reselecting the served UE further comprises: performing filtering, biasing, thresholding, or any combination thereof on the measured first rank and second rank of the channel state information reference signal, wherein the reselection of the served UE beam is at least partially based on the filtering, the biasing, the thresholding, or any combination thereof.

[0192] Aspect 11: According to any one of aspects 1 to 10, the method further comprises: predicting a set of time resources for the channel state information reference signal based at least in part on one or more previous channel state information reference signal configurations.

[0193] Aspect 12: According to the method described in any one of Aspects 1 to 11, the method further includes: determining a time slot format of a time slot including a set of time resources for the channel state information reference signal, wherein the time slot format includes at least one downlink shared channel resource; and monitoring the time slot using the candidate UE beam based at least in part on determining the time slot format, wherein the channel state information reference signal is measured at least in part based on monitoring the time slot.

[0194] Aspect 13: According to the method of Aspect 12, the method also includes: using the candidate UE beam to measure the demodulation reference signal on the at least one downlink shared channel resource; and performing channel estimation for the time slot based at least in part on measuring the demodulation reference signal.

[0195] Aspect 14: According to any one of Aspects 1 to 13, the method further includes: using the candidate UE beam for multiple time slots based at least in part on a time window around a set of time resources used for the channel state information reference signal, wherein the channel state information reference signal is measured during at least one symbol in the multiple time slots.

[0196] Aspect 15: The method according to aspect 14 further comprises: determining a scheduling change of the network entity, wherein the candidate UE beams are used for the plurality of time slots based at least in part on the scheduling change.

[0197] Aspect 16: A method according to any one of aspects 14 to 15, wherein using the candidate UE beam for the multiple time slots includes: using the candidate UE beam for uplink communication and downlink communication during the multiple time slots.

[0198] Aspect 17: According to the method described in any one of Aspects 1 to 16, the method further includes: using the candidate UE beam to monitor a time slot including a time resource set for the channel state information reference signal, wherein the channel state information reference signal is measured on a symbol of the time slot that is different from a predicted symbol of the time resource set for the channel state information reference signal.

[0199] Aspect 18: According to the method described in any one of Aspects 1 to 17, the method also includes: identifying a time resource set for the channel state information reference signal based at least in part on one or more previous channel state information reference signal configurations; identifying a non-periodic reference signal resource configuration from the one or more previous channel state information reference signal configurations; and determining scheduling information for one or more previous channel state information measurements based at least in part on the non-periodic reference signal resource configuration, wherein the time resource set is identified at least in part based on the scheduling information.

[0200] Aspect 19: According to the method described in any one of Aspects 1 to 18, the method further comprises: measuring the spectrum efficiency for each rank of the candidate UE beams respectively.

[0201] Aspect 20: According to any one of Aspects 1 to 19, the method further includes: updating the subset based at least in part on measuring the channel state information reference signal, additional synchronization signal block measurement, one or more channel state information reference signal measurements using one or more additional candidate UE beams, or any combination thereof.

[0202] Aspect 21: A method according to any one of Aspects 1 to 20, wherein identifying the subset comprises: identifying the subset from a beam subset of a set used for the synchronization signal block measurement.

[0203] Aspect 22: A method according to aspect 21, wherein the subset of candidate UE beams is identified at least in part based on reference signal received power measurements of the subset of beams for the set of synchronization signal block measurements.

[0204] Aspect 23: A method according to any one of Aspects 21 to 22, wherein the subset of candidate UE beams is identified at least in part based on a channel impulse response measurement of the subset of beams for the set of synchronization signal block measurements.

[0205] Aspect 24: A method according to any one of aspects 21 to 23, wherein the subset of candidate UE beams is identified based at least in part on an uplink link budget of the UE.

[0206] Aspect 25: The method according to any one of aspects 1 to 24, wherein the channel state information reference signal is an acquired channel state information reference signal.

[0207] Aspect 26: An apparatus for performing wireless communications at a UE, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 1 to 25.

[0208] Aspect 27: An apparatus for wireless communication at a UE, the apparatus comprising at least one component for performing a method according to any one of aspects 1 to 25.

[0209] Aspect 28: 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 a method according to any one of aspects 1 to 25.

[0210] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified and other implementations are possible. In addition, aspects from two or more methods may be combined.

[0211] 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 techniques described may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0212] 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.

[0213] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed using a general purpose processor, DSP, ASIC, CPU, 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, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0214] The functions described herein can be implemented using hardware, software executed by a processor, firmware, or any combination thereof. When implemented using software executed by a processor, the functions can be stored as one or more instructions or codes of a computer-readable medium, or sent using one or more instructions or codes of a computer-readable medium. Other examples and specific implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these items. Features that implement the functions can also be physically located at different locations, including being distributed so that the functions are implemented at different physical locations.

[0215] Computer-readable medium includes both non-transient computer storage medium and communication medium, and it includes any medium that facilitates computer program to be transmitted from one position to another position.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose 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 parts and any other non-transient medium that can be accessed by general or special-purpose computer or general or special-purpose processor in the form of instruction or data structure.Moreover, any connection is appropriately referred to as computer-readable medium.For example, if software is sent from website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer-readable medium. Disks and optical disks used herein include CDs, laser optical disks, optical optical disks, digital versatile disks (DVDs), floppy disks, and Blu-ray disks. Disks can reproduce data magnetically, while optical disks can reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0216] 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."

[0217] 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.

[0218] 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.

[0219] 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.

[0220] 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: measuring a set of synchronization signal blocks; selecting a set of candidate beams for measuring a channel state information reference signal based at least in part on a power measurement associated with uplink performance; selecting a subset of the candidate beams for measuring the channel state information reference signal based at least in part on a set of synchronization signal block measurements; measuring spectral efficiency using a first candidate beam from the subset of the set of candidate beams based at least in part on the channel state information reference signal; as well as A spectral efficiency measurement is sent to a network entity based at least in part on measuring the spectral efficiency using the candidate UE beams.

2. The method according to claim 1, further comprising: calculating the power measurement based at least in part on a difference between a power threshold and a reference power value; as well as A number of UE beams for a candidate UE beam set is determined based at least in part on the calculated power measurement.

3. The method according to claim 2, further comprising: The power threshold is calculated based at least in part on a difference between a transmit power value, a first power reduction value, and a second power reduction value, wherein the power threshold is a maximum transmit power limit.

4. The method according to claim 2, further comprising: The reference power value is calculated based at least in part on a combination of an uplink channel value, a path loss value, a frequency, and a bandwidth value, wherein the reference power value is a reference requested power. The method according to claim 4 , wherein the bandwidth value comprises a maximum transmission bandwidth and a number of carriers.

6. The method of claim 1, wherein the power measurement comprises one or more virtual power headroom values ​​associated with corresponding beams of the candidate UE beam set.

7. The method of claim 1, wherein selecting the candidate UE beam set is based at least in part on the power measurement being positive.

8. The method according to claim 1, further comprising: selecting a serving UE beam for measuring the channel state information reference signal based at least in part on the set of synchronization signal block measurements; as well as A measurement report is generated based at least in part on the spectral efficiency measurement and a last channel state information reference signal measurement on the served UE beam.

9. The method according to claim 8, further comprising: The serving UE beam is reselected based at least in part on measuring the channel state information reference signal.

10. The method according to claim 9, wherein reselecting the serving UE further comprises: Filtering, biasing, thresholding, or any combination thereof are performed on the measured first and second ranks of the channel state information reference signal, wherein the reselection of the served UE beam is at least partially based on the filtering, the biasing, the thresholding, or any combination thereof.

11. The method according to claim 1, further comprising: A set of time resources for the channel state information reference signal is predicted based at least in part on one or more previous channel state information reference signal configurations.

12. The method according to claim 1, further comprising: determining a time slot format of a time slot including a set of time resources for the channel state information reference signal, wherein the time slot format includes at least one downlink shared channel resource; as well as The timeslot is monitored using the candidate UE beam based at least in part on determining the timeslot format, wherein the channel state information reference signal is measured based at least in part on monitoring the timeslot.

13. The method according to claim 12, further comprising: measuring a demodulation reference signal on the at least one downlink shared channel resource using the candidate UE beam; as well as Channel estimation for the time slot is performed based at least in part on measuring the demodulation reference signal.

14. The method according to claim 1, further comprising: The candidate UE beam is used for a plurality of time slots based at least in part on a time window around a set of time resources for the channel state information reference signal measured during at least one symbol in the plurality of time slots.

15. The method according to claim 14, further comprising: A scheduling change for the network entity is determined, wherein the candidate UE beams are used for the plurality of time slots based at least in part on the scheduling change.

16. The method of claim 14, wherein using the candidate UE beams for the plurality of time slots comprises: The candidate UE beams are used for uplink communications and downlink communications during the plurality of time slots.

17. The method according to claim 1, further comprising: A time slot including a set of time resources for the channel state information reference signal is monitored using the candidate UE beam, wherein the channel state information reference signal is measured on symbols of the time slot that are different from predicted symbols of the set of time resources for the channel state information reference signal.

18. The method according to claim 1, further comprising: identifying a set of time resources for the channel state information reference signal based at least in part on one or more previous channel state information reference signal configurations; identifying an aperiodic reference signal resource configuration from the one or more previous channel state information reference signal configurations; as well as Scheduling information for one or more previous channel state information measurements is determined based at least in part on the aperiodic reference signal resource configuration, wherein the set of time resources is identified based at least in part on the scheduling information.

19. The method according to claim 1, further comprising: The spectral efficiency is measured for each rank of the candidate UE beams respectively.

20. The method according to claim 1, further comprising: The subset is updated based at least in part on measuring the channel state information reference signal, additional synchronization signal block measurements, one or more channel state information reference signal measurements using one or more additional candidate UE beams, or any combination thereof.

21. The method of claim 1, wherein identifying the subset comprises: The subset is identified from a set of beam subsets for the synchronization signal block measurements.

22. The method of claim 21, wherein the subset of candidate UE beams is identified based at least in part on reference signal received power measurements of the subset of beams for the set of synchronization signal block measurements.

23. The method of claim 21, wherein the subset of the candidate UE beams is identified based at least in part on a channel impulse response measurement of the subset of beams for the set of synchronization signal block measurements.

24. The method of claim 21, wherein the subset of the candidate UE beams is identified based at least in part on an uplink link budget of the UE.

25. The method of claim 1, wherein the channel state information reference signal is an acquired channel state information reference signal.

26. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: measuring a set of synchronization signal blocks; selecting a set of candidate beams for measuring a channel state information reference signal based at least in part on a power measurement associated with uplink performance; selecting a subset of the candidate beams for measuring the channel state information reference signal based at least in part on a set of synchronization signal block measurements; measuring spectral efficiency using a first candidate beam from the subset of the set of candidate beams based at least in part on the channel state information reference signal; as well as A spectral efficiency measurement is sent to a network entity based at least in part on measuring the spectral efficiency using the candidate UE beams.

27. The apparatus of claim 26, wherein the instructions are further executable by the processor to cause the apparatus to: calculating the power measurement based at least in part on a difference between a power threshold and a reference power value; and A number of UE beams for a candidate UE beam set is determined based at least in part on the calculated power measurement.

28. The apparatus of claim 27, wherein the instructions are further executable by the processor to cause the apparatus to: The power threshold is calculated based at least in part on a difference between a transmit power value, a first power reduction value, and a second power reduction value, wherein the power threshold is a maximum transmit power limit.

29. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: means for measuring a set of synchronization signal blocks; means for selecting a set of candidate beams for measuring a channel state information reference signal based at least in part on a power measurement associated with uplink performance; means for selecting the subset of candidate beams for measuring the channel state information reference signal based at least in part on a set of synchronization signal block measurements; means for measuring spectral efficiency using a first candidate beam from the subset of the set of candidate beams based at least in part on the channel state information reference signal; and Means for transmitting a spectral efficiency measurement to a network entity based at least in part on measuring the spectral efficiency using the candidate UE beams.

30. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to: measuring a set of synchronization signal blocks; selecting a set of candidate beams for measuring a channel state information reference signal based at least in part on a power measurement associated with uplink performance; selecting a subset of the candidate beams for measuring the channel state information reference signal based at least in part on a set of synchronization signal block measurements; measuring spectral efficiency using a first candidate beam from the subset of the set of candidate beams based at least in part on the channel state information reference signal; as well as A spectral efficiency measurement is sent to a network entity based at least in part on measuring the spectral efficiency using the candidate UE beams.

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