User equipment beam management

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may identify a slot or symbol for which a channel state information reference signal (CSI-RS) for a procedure 2 (P2) resource is to be scheduled. The UE may schedule candidate UE beams or serving UE beams for the time slot or the symbol. The UE may measure a spectral efficiency associated with the P2 resource. The UE may prepare a report indicating one or more characteristics of the candidate UE beam or the serving UE beam. Numerous other aspects are described.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Patent Application No. 17 / 931,069, filed on September 9, 2022, entitled “USER EQUIPMENT BEAM MANAGEMENT” and assigned to the assignee of this application. The disclosure of the prior application is considered a part of and incorporated by reference into this patent application. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for user equipment beam management. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more network nodes that support communications for wireless communication devices, such as user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink communications and uplink communications. A "downlink" (or "DL") refers to a communication link from a network node to a UE, and an "uplink" (or "UL") refers to a communication link from a UE to a network node. Some wireless networks may support device-to-device communications, such as via a local link (e.g., a side link (SL), a wireless local area network (WLAN) link, and / or a wireless personal area network (WPAN) link, etc.).

[0006] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate at a city, country, region and / or global level. New Radio (NR), which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and / or single carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink to better integrate with other open standards, as well as supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR and other radio access technologies remain useful. Summary of the invention

[0007] Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE). The method may include identifying a time slot or symbol for which a channel state information reference signal (CSI-RS) for a procedure 2 (P2) resource is to be scheduled. The method may include scheduling a candidate UE beam or a serving UE beam for the time slot or symbol. The method may include measuring a spectral efficiency associated with the P2 resources. The method may include preparing a report indicating one or more characteristics of the candidate UE beam or the serving UE beam.

[0008] Some aspects described herein relate to an apparatus for wireless communication performed by a UE. The apparatus may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to identify a time slot or symbol for which a CSI-RS for a P2 resource is to be scheduled. The one or more processors may be configured to schedule a candidate UE beam or a serving UE beam for a time slot or symbol. The one or more processors may be configured to measure a spectral efficiency associated with a P2 resource. The one or more processors may be configured to prepare a report indicating one or more characteristics of a candidate UE beam or a serving UE beam.

[0009] Some aspects described herein relate to a non-transitory computer-readable medium storing an instruction set for wireless communication by a UE. The instruction set, when executed by one or more processors of the UE, may cause the UE to identify a time slot or symbol for which a CSI-RS for a P2 resource is to be scheduled. The instruction set, when executed by one or more processors of the UE, may cause the UE to schedule a candidate UE beam or a serving UE beam for a time slot or symbol. The instruction set, when executed by one or more processors of the UE, may cause the UE to measure a spectral efficiency associated with a P2 resource. The instruction set, when executed by one or more processors of the UE, may cause the UE to prepare a report indicating one or more characteristics of a candidate UE beam or a serving UE beam.

[0010] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include components for identifying a time slot or symbol for which a CSI-RS for a P2 resource is to be scheduled. The apparatus may include components for scheduling a candidate UE beam or a serving UE beam for the time slot or symbol. The apparatus may include components for measuring a spectral efficiency associated with the P2 resource. The apparatus may include components for preparing a report indicating one or more characteristics of the candidate UE beam or the serving UE beam.

[0011] Aspects collectively include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network entities, network nodes, wireless communication devices and / or processing systems as fully described herein with reference to and as illustrated in the accompanying drawings.

[0012] The features and technical advantages of examples according to the present disclosure have been outlined quite broadly above so that the following specific embodiments may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures for achieving the same purpose of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and not as a definition of the limitations of the claims.

[0013] Although various aspects are described in the present disclosure by illustrating some examples, it will be understood by those skilled in the art that such aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes and / or packaging arrangements. For example, some aspects can be implemented via integrated chip implementations or other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment and / or artificial intelligence devices). Various aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components and / or system-level components. The equipment incorporating the various aspects and features described may include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders and / or summers). The various aspects described herein are intended to be practiced in various devices, components, systems, distributed arrangements and / or end-user devices of various sizes, shapes and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to fully understand the above-mentioned features of the present disclosure, a more specific description of the invention briefly summarized above can be obtained by referring to various aspects (some of which are illustrated in the accompanying drawings). However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and are therefore not to be considered as limiting the scope thereof, as the specification may admit of other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0015] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0016] Figure 2 is a diagram illustrating an example of communication between a network node and a user equipment (UE) in a wireless network according to the present disclosure.

[0017] Figure 3 is a diagram illustrating an example decomposed base station architecture according to the present disclosure.

[0018] Figure 4 is a diagram illustrating an example of a beam management procedure according to the present disclosure.

[0019] Figure 5 is a diagram illustrating an example of UE beam management according to the present disclosure.

[0020] Figure 6 is a diagram illustrating an example process performed, for example, by a UE according to the present disclosure.

[0021] Figure 7 is a diagram of an example apparatus for wireless communications according to the present disclosure. DETAILED DESCRIPTION

[0022] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms, and should not be construed as being limited to any specific structure or function presented throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the protection scope of the present disclosure will be fully conveyed to those skilled in the art. It should be appreciated by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods implemented using other structures, functionality, or structures and functionality in addition to or different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the present invention.

[0023] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0024] Figure 11 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, or may include elements of a 5G (e.g., NR) network and / or elements of a 4G (e.g., Long Term Evolution (LTE)) network, etc. The wireless network 100 may include one or more network nodes 110 (shown as network node 110a, network node 110b, network node 110c, and network node 110d), user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other entities. The network node 110 is a network node that communicates with the UE 120. As shown in the figure, the network node 110 may include one or more network nodes. For example, the network node 110 may be a converged network node, which means that the converged network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). For another example, the network node 110 may be a decomposed network node (sometimes referred to as a decomposed base station), which means that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed between two or more nodes (such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0025] In some examples, the network node 110 is or includes a network node that communicates with the UE 120 via a radio access link, such as an RU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or communicates with the core network via a backhaul link, such as a CU. In some examples, the network node 110 (such as an aggregated network node 110 or a decomposed network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. The network node 110 may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, a transmit receive point (TRP), a DU, a RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, a RAN node, or a combination thereof. In some examples, network nodes 110 may be interconnected to each other or to one or more other network nodes 110 in wireless network 100 via various types of fronthaul, midhaul, and / or backhaul interfaces (such as direct physical connections, air interfaces, or virtual networks) using any suitable transport network.

[0026] In some examples, the network node 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term "cell" may refer to the coverage area of ​​the network node 110 and / or the network node subsystem serving the coverage area, depending on the context in which the term is used. The network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by a UE 120 with a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by a UE 120 with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by a UE 120 associated with the femto cell (e.g., a UE 120 in a closed subscriber group (CSG)). A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. The network node 110 for a femto cell may be referred to as a femto network node or a home network node. Figure 1 In the example shown in , network node 110a may be a macro network node for macro cell 102a, network node 110b may be a pico network node for pico cell 102b, and network node 110c may be a femto network node for femto cell 102c. A network node may support one or more (e.g., three) cells. In some examples, a cell may not necessarily be stationary, and the geographic area of ​​a cell may move depending on the location of a mobile network node 110 (e.g., a mobile network node).

[0027] In some aspects, the term "base station" or "network node" may refer to an aggregated base station, a decomposed base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, a "base station" or "network node" may refer to a CU, a DU, a RU, a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC, or a combination thereof. In some aspects, the term "base station" or "network node" may refer to a device configured to perform one or more functions (such as those described herein in conjunction with network node 110). In some aspects, the term "base station" or "network node" may refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of a plurality of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to repeatedly perform at least a portion of the function, and the term "base station" or "network node" may refer to any one or more of these different devices. In some aspects, the term "base station" or "network node" may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the term "base station" or "network node" may refer to one of the base station functions, but not another base station function. In this way, a single device may include more than one base station.

[0028] The wireless network 100 may include one or more relay stations. A relay station is a network node that can receive transmissions of data from an upstream node (e.g., a network node 110 or a UE 120) and transmit transmissions of data to a downstream node (e.g., a UE 120 or a network node 110). A relay station may be a UE 120 that is capable of relaying transmissions for other UEs 120. Figure 1 In the example shown in , a network node 110d (e.g., a relay network node) may communicate with a network node 110a (e.g., a macro network node) and a UE 120d to facilitate communication between the network node 110a and the UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay base station, a relay network node, a relay node, a relay, etc.

[0029] The wireless network 100 may be a heterogeneous network that includes different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, etc. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. For example, a macro network node may have a high transmit power level (e.g., 5 watts to 40 watts), while a pico network node, a femto network node, and a relay network node may have a lower transmit power level (e.g., 0.1 watt to 2 watts).

[0030] The network controller 130 may be coupled to or in communication with a set of network nodes 110 and may provide coordination and control for the network nodes 110. The network controller 130 may communicate with the network nodes 110 via a backhaul communication link or a midhaul communication link. The network nodes 110 may also communicate directly with each other or indirectly via a wireless backhaul communication link or a wired backhaul communication link. In some aspects, the network controller 130 may be or may include a CU or a core network device.

[0031] UE 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile. UE 120 may include, for example, an access terminal, a terminal, a mobile station, and / or a subscriber unit. UE 120 may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, a UE function of a network node, and / or any other suitable device configured to communicate via a wireless or wired medium.

[0032] Some UEs 120 may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors and / or location tags, which may communicate with a network node, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered as Internet of Things (IoT) devices and / or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered as customer premises equipment. UE 120 may be included in a housing that houses components of UE 120, such as a processor component and / or a memory component. In some examples, the processor component and the memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operably coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0033] Generally speaking, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a specific RAT and may operate on one or more frequencies. RAT may be referred to as a radio technology, air interface, etc. Frequency may be referred to as a carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0034] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using network node 110 as an intermediary to communicate with each other) using one or more side link channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols) and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by network node 110.

[0035] The devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various categories, bands, channels, etc., according to frequency or wavelength. For example, the devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). It should be understood that, although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "below 6 GHz" band in various documents and articles. A similar naming problem sometimes occurs with respect to FR2, which is often (interchangeably) referred to as the "millimeter wave" band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz to 300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0036] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125 GHz to 24.25 GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and therefore the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz) and FR5 (114.25 GHz to 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0037] Considering the above examples, unless otherwise explicitly stated, it should be understood that if the term "below 6 GHz" or the like is used herein, the term may broadly refer to frequencies that may be lower than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise explicitly stated, it should be understood that if the term "millimeter wave" or the like is used herein, the term may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or may be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0038] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may: identify a time slot or symbol for which a channel state information reference signal (CSI-RS) for a procedure 2 (P2) resource is to be scheduled; schedule a candidate UE beam or a serving UE beam for the time slot or symbol; measure a spectral efficiency associated with the P2 resources; and prepare a report indicating one or more characteristics of the candidate UE beam or the serving UE beam. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0039] As indicated above, Figure 1 are provided as examples. Other examples can be found in the Figure 1 The examples described are different.

[0040] Figure 22 is a diagram illustrating an example 200 of a network node 110 communicating with a UE 120 in a wireless network 100 according to the present disclosure. The network node 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≥1). The UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≥1). The network node 110 of example 200 includes one or more radio frequency components, such as an antenna 234 and a modem 254. In some examples, the network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include a radio frequency component that facilitates direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0041] At the network node 110, a transmit processor 220 may receive data intended for a UE 120 (or a set of UEs 120) from a data source 212. The transmit processor 220 may select one or more modulation and coding schemes (MCS) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from the UE 120. The network node 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS selected for the UE 120, and may provide data symbols for the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) (shown as modems 232a to 232t). For example, each output symbol stream may be provided to a modulator component (shown as MOD) of the modem 232. Each modem 232 may process a corresponding output symbol stream (e.g., for OFDM) using a corresponding modulator component to obtain an output sample stream. Each modem 232 may further process (e.g., convert to analog, amplify, filter, and / or upconvert) the output sample stream using a corresponding modulator component to obtain a downlink signal. The modems 232a through 232t may transmit a set of downlink signals (eg, T downlink signals) via a corresponding set of antennas 234 (eg, T antennas) (shown as antennas 234a through 234t).

[0042] At the UE 120, a set of antennas 252 (shown as antennas 252a to 252r) may receive downlink signals from the network node 110 and / or other network nodes 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a to 254r). For example, each received signal may be provided to a demodulator component (shown as DEMOD) of the modem 254. Each modem 254 may use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modem 254, may perform MIMO detection on the received symbols where applicable, and may provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to the data sink 260, and may provide decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a CQI parameter, among other things. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0043] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.

[0044] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or be included within one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, etc. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements (in a single housing or multiple housings), sets of coplanar antenna elements, sets of non-coplanar antenna elements, and / or coupled to one or more transmit and / or receive components (such as, Figure 2 One or more antenna elements of one or more components in.

[0045] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266, where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and sent to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform the functions described herein (eg, with reference to Figures 5 to 7 ) or any aspect of any of the methods described herein.

[0046] At the network node 110, uplink signals from the UE 120 and / or other UEs may be received by the antenna 234, processed by the modem 232 (e.g., a demodulator component (shown as DEMOD) of the modem 232), detected by the MIMO detector 236 (where applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink communication and / or uplink communication. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to execute the instructions described herein (e.g., reference 20). Figures 5 to 7 ) or any aspect of any of the methods described herein.

[0047] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other components of the network node 110 may perform one or more techniques associated with UE beam management, as described in more detail elsewhere herein. For example, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the Figure 6 600 and / or other processes as described herein. Memory 242 and memory 282 may store data and program codes for network node 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium that stores one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed by one or more processors of network node 110 and / or UE 120 (e.g., directly executed, or executed after compilation, conversion, and / or interpretation), may cause one or more processors, UE 120, and / or network node 110 to perform or direct, for example, Figure 6 The process 600 and / or operations of other processes as described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0048] In some aspects, the UE 120 includes: a component for identifying a time slot or symbol for which a CSI-RS for a P2 resource is to be scheduled; a component for scheduling a candidate UE beam or a serving UE beam for a time slot or symbol; a component for measuring a spectral efficiency associated with the P2 resource; and / or a component for preparing a report indicating one or more characteristics of the candidate UE beam or the serving UE beam. The components for the UE 120 to perform the operations described herein may include, for example, one or more of the communication manager 140, the antenna 252, the modem 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the controller / processor 280, or the memory 282.

[0049] Although Figure 2 The blocks in the 200 and 210 are illustrated as distinct components, but the functionality described above for these blocks may be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described for the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0050] As indicated above, Figure 2 are provided as examples. Other examples can be found in the Figure 2 The examples described are different.

[0051] The deployment of a communication system (such as a 5G NR system) can be arranged in a variety of ways with various components or components. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a RAN node, a core network node, a network element, a base station or network equipment can be implemented in an aggregated or decomposed architecture. For example, a base station (such as a node B (NB), an evolved NB (eNB), an NRBS, a 5G NB, an access point (AP), a TRP or a cell, etc.) or one or more units (or one or more components) performing base station functionality can be implemented as an aggregated base station (also referred to as an independent base station or a monolithic base station) or a decomposed base station. "Network entity" or "network node" may refer to a decomposed base station or one or more units of a decomposed base station (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof).

[0052] An aggregated base station (e.g., an aggregated network node) may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A decomposed base station (e.g., a decomposed network node) may be configured to utilize a protocol stack that is physically or logically distributed between two or more units (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, a CU may be implemented within a network node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed across one or more other network nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may also be implemented as a virtual unit, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), and the like.

[0053] Base station type operations or network designs may take into account the aggregated nature of base station functionality. For example, a decomposed base station may be utilized in an IAB network, an open radio access network (O-RAN (such as a network configuration initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)) to facilitate the scaling of a communication system by separating base station functionality into one or more units that can be deployed separately. A decomposed base station may include functionality implemented across two or more units at various physical locations, as well as functionality implemented virtually for at least one unit, which may enable flexibility in network design. Individual units of a decomposed base station may be configured for wired or wireless communication with at least one other unit of the decomposed base station.

[0054] Figure 33 is a diagram illustrating an example decomposed base station architecture 300 according to the present disclosure. The decomposed base station architecture 300 may include a CU 310, which may communicate directly with a core network 320 via a backhaul link, or indirectly with the core network 320 through one or more decomposed control units (such as a near-RT RIC 325 via an E2 link, or a non-RT RIC 315 associated with a service management and orchestration (SMO) framework 305, or both). The CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as via an F1 interface. Each of the DUs 330 may communicate with one or more RUs 340 via respective fronthaul links. Each of the RUs 340 may communicate with one or more UEs 120 via respective radio frequency (RF) access links. In some implementations, a UE 120 may be served simultaneously by multiple RUs 340.

[0055] Each of the units (including CU 310, DU 330, RU 340) and the near-RT RIC 325, non-RT RIC 315, and SMO framework 305 may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively referred to as signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to one or more communication interfaces of the corresponding unit may be configured to communicate with one or more of the other units via a transmission medium. In some examples, each of the units may include a wired interface and a wireless interface, the wired interface being configured to receive signals or send signals to one or more of the other units via a wired transmission medium, and the wireless interface may include a receiver, a transmitter, or a transceiver (such as an RF transceiver), which is configured to receive signals or send signals to one or more of the other units via a wireless transmission medium, or both.

[0056] In some aspects, CU 310 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC) functions, packet data convergence protocol (PDCP) functions, or service data adaptation protocol (SDAP) functions, etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 310. CU 310 may be configured to handle user plane functionality (e.g., central unit-user plane (CU-UP) functionality), control plane functionality (e.g., central unit-control plane (CU-CP) functionality), or a combination thereof. In some specific implementations, CU 310 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface such as an E1 interface. As needed, CU 310 may be implemented to communicate with DU 330 for network control and signaling.

[0057] Each DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 340. In some aspects, the DU 330 may host one or more of a radio link control (RLC) layer, a MAC layer, and one or more high physical (PHY) layers, at least in part, according to a functional partition such as that defined by 3GPP. In some aspects, one or more high PHY layers may be implemented by one or more modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc. In some aspects, the DU 330 may also host one or more low PHY layers, such as one or more modules for fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming or physical random access channel (PRACH) extraction and filtering, etc. Each layer (which may also be referred to as a module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by the DU 330 or with control functions hosted by the CU 310.

[0058] Each RU 340 may implement lower layer functionality. In some deployments, the RU 340 controlled by the DU 330 may correspond to a logical node that hosts RF processing functions based on functional splits (e.g., functional splits defined by 3GPP) such as lower layer functional splits, or low PHY layer functions such as performing FFT, performing iFFT, digital beamforming, or PRACH extraction and filtering, etc. In this architecture, each RU 340 may be operated to handle over-the-air (OTA) communications with one or more UEs 120. In some specific implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 340 may be controlled by the corresponding DU 330. In some scenarios, this configuration may enable each DU 330 and CU 310 to be implemented in a cloud-based RAN architecture such as a vRAN architecture.

[0059] The SMO framework 305 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 390) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, non-RT RIC 315, and near-RT RIC 325. In some specific implementations, the SMO framework 305 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 311) via the O1 interface. Additionally, in some implementations, the SMO framework 305 can communicate directly with each of the one or more RUs 340 via a corresponding O1 interface. The SMO framework 305 can also include a non-RTRIC 315 configured to support the functionality of the SMO framework 305.

[0060] The non-RT RIC 315 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 325. The non-RT RIC 315 may be coupled to or communicate with the near-RT RIC 325 (such as via an A1 interface). The near-RT RIC 325 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 310, one or more DUs 330, or both, and the O-eNB with the near-RT RIC 325.

[0061] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 325 and may be received from a non-network data source or from a network function at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or the near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 305 (such as via reconfiguration of the O1 interface) or via the creation of RAN management policies (such as A1 interface policies).

[0062] As indicated above, Figure 3 are provided as examples. Other examples can be found in the Figure 3 The examples described are different.

[0063] Figure 4 4 is a diagram illustrating examples 400, 410, and 420 of beam management procedures according to the present disclosure. Figure 4 As shown, examples 400, 410, and 420 include UE 120 communicating with network node 110 in a wireless network (e.g., wireless network 100). Figure 4 The devices shown are provided as examples, and the wireless network may support communication and beam management between other devices (e.g., between UE 120 and network node 110 or a transmit receive point (TRP), between a mobile terminal node and a control node, between an integrated access and backhaul (IAB) child node and an IAB parent node, between a scheduled node and a scheduling node). In some aspects, UE 120 and network node 110 may be in a connected state (e.g., an RRC connected state).

[0064] like Figure 4 As shown, example 400 may include a network node 110 (e.g., one or more network node devices such as RU, DU and / or CU, etc.) and a UE 120 communicating to perform beam management using CSI-RS. Example 400 depicts a first beam management procedure (e.g., P1 CSI-RS beam management). The first beam management procedure may be referred to as a beam selection procedure, an initial beam acquisition procedure, a beam scanning procedure, a cell search procedure, and / or a beam search procedure. Figure 4 As shown in example 400, the CSI-RS may be configured to be sent from the network node 110 to the UE 120. The CSI-RS may be configured to be periodic (e.g., using RRC signaling), semi-persistent (e.g., using medium access control (MAC) control element (MAC-CE) signaling), and / or aperiodic (e.g., using downlink control information (DCI)).

[0065] The first beam management procedure may include the network node 110 performing beam scanning on multiple transmit (Tx) beams. The network node 110 may transmit a CSI-RS using each transmit beam used for beam management. In order to enable the UE 120 to perform receive (Rx) beam scanning, the network node may transmit each CSI-RS multiple times (e.g., with repetitions) within the same RS resource set using a transmit beam, so that the UE 120 may sweep the receive beam in multiple transmit instances. For example, in the case where the network node 110 has a set of N transmit beams and the UE 120 has a set of M receive beams, the CSI-RS may be transmitted M times on each of the N transmit beams, so that the UE 120 may receive M instances of the CSI-RS per transmit beam. In other words, for each transmit beam of the network node 110, the UE 120 may perform beam scanning on the receive beam of the UE 120. Thus, the first beam management procedure may enable UE 120 to measure CSI-RS on different transmit beams using different receive beams to support selection of network node 110 transmit beam / UE 120 receive beam pairs. UE 120 may report the measurements to network node 110 to enable network node 110 to select one or more beam pairs for communication between network node 110 and UE 120. Although example 400 has been described in conjunction with CSI-RS, the first beam management procedure may also use synchronization signal blocks (SSBs) to perform beam management in a similar manner as described above.

[0066] like Figure 4As shown, example 410 may include network node 110 and UE 120 communicating to perform beam management using CSI-RS. Example 410 depicts a second beam management procedure (e.g., P2 CSI-RS beam management). The second beam management procedure may be referred to as a beam refinement procedure, a network node beam refinement procedure, a TRP beam refinement procedure, and / or a transmit beam refinement procedure. Figure 4 As shown in example 410, the CSI-RS may be configured to be transmitted from the network node 110 to the UE 120. The CSI-RS may be configured to be non-periodic (e.g., using DCI). The second beam management procedure may include the network node 110 performing beam scanning on one or more transmit beams. The one or more transmit beams may be a subset of all transmit beams associated with the network node 110 (e.g., determined at least in part based on measurements reported by the UE 120 in conjunction with the first beam management procedure). The network node 110 may transmit the CSI-RS using each of the one or more transmit beams used for beam management. The UE 120 may measure each CSI-RS using a single (e.g., identical) receive beam (e.g., determined at least in part based on measurements performed in conjunction with the first beam management procedure). The second beam management procedure may enable the network node 110 to select the best transmit beam based at least in part on measurements of the CSI-RS reported by the UE 120 (e.g., measured by the UE 120 using a single receive beam).

[0067] like Figure 4 As shown, example 420 depicts a third beam management procedure (e.g., P3 CSI-RS beam management). The third beam management procedure may be referred to as a beam refinement procedure, a UE beam refinement procedure, and / or a receive beam refinement procedure. Figure 4As shown in example 420, one or more CSI-RS may be configured to be sent from the network node 110 to the UE 120. The CSI-RS may be configured to be non-periodic (e.g., using DCI). The third beam management process may include the network node 110 sending one or more CSI-RS using a single transmit beam (e.g., determined at least in part based on measurements reported by the UE 120 in conjunction with the first beam management procedure and / or the second beam management procedure). In order to enable the UE 120 to perform receive beam scanning, the network node may use the transmit beam to send multiple times (e.g., with repetitions) CSI-RS within the same RS resource set, so that the UE 120 can sweep across one or more receive beams in multiple transmission instances. The one or more receive beams may be a subset of all receive beams associated with the UE 120 (e.g., determined at least in part based on measurements performed in conjunction with the first beam management procedure and / or the second beam management procedure). The third beam management procedure may enable the network node 110 and / or the UE 120 to select the best receive beam based at least in part on reported measurements received from the UE 120 (e.g., the reported measurements are measurements of the CSI-RS of the transmit beam using the one or more receive beams).

[0068] In some cases, beam management may be based at least in part on SSB or CSI-RS. In particular, UE beam management may be based at least in part on SSB or CSI-RS for Procedure 3 (P3). SSB is a rank 1 periodic reference signal that is configured similarly in most networks, while CSI-RS for P3 is an optional reference signal that may be configured differently across different networks. In some cases, rank 1 may indicate that the UE is using only one receive antenna port to receive information and the network node is using only one transmit antenna port to send information to the UE, while rank 2 may indicate that the UE is receiving on two receive antenna ports (e.g., using MIMO).

[0069] In some cases, the CSI-RS may be a CSI-RS for acquisition (ACQ), a CSI-RS for tracking reference signals (TRS), a CSI-RS for beam management (BM), a CSI-RS for P2, or a CSI-RS for P3, etc. The CSI-RS for ACQ may be used for channel state feedback to optimize downlink throughput through link adaptation, but may not be configured with a tracking field or a repetition field. The CSI-RS for TRS may be designed for UE to update timing and frequency tracking loops, and may be configured with a tracking field, but may not be configured with a repetition field. The CSI-RS for BM may be configured with a repetition field, but may not be configured with a tracking field. If the repetition field is set to false, the CSI-RS for BM may be a CSI-RS for P2. The CSI-RS for P2 may be based at least in part on transmitter-side (e.g., network node) beam refinement, where beam scanning occurs at the transmitter by keeping the receiver beam fixed. In contrast, if the repeat field is set to true, the CSI-RS for BM may be the CSI-RS for P3. The CSI-RS for P3 may be based at least in part on receiver-side (e.g., UE) beam adjustment, where beam scanning occurs at the receiver end given the current transmit beam. Additional details about some of the reference signals are described in Table 1 below.

[0070] Table 1: SSB characteristics and CSI-RS characteristics

[0071]

[0072] In some cases, UE beam selection using SSB may be limited due to the rank 1 nature of SSB. For example, SSB may not be optimized for rank 2 performance. Similarly, the CSI-RS used for ACQ may have limited use for UE beam selection because the k0 timing offset of the CSI-RS used for ACQ (e.g., the offset between the downlink time slot in which the physical downlink control channel (PDCCH) for downlink scheduling is received and the downlink time slot in which the physical downlink shared channel (PDSCH) data is scheduled) may be equal to zero (e.g., k0=0). This may make it difficult for the UE to predict conditions in advance and program different beams. In contrast, the CSI-RS for P2 may have a k0 value greater than 2 (e.g., k0>2), which may allow the UE to have enough time to program different beams in advance. However, as described herein, the CSI-RS for P2 may be a reference signal configured by a network node and may not be configured for use by the UE.

[0073] Techniques and apparatus for UE beam management are described herein. In some aspects, a UE may identify multiple candidate UE beams for measuring CSI-RS for P2 resources, and may identify time slots or symbols for which CSI-RS for P2 resources are to be scheduled. The UE may schedule a candidate UE beam or a serving UE beam for a time slot or symbol, and may measure the spectral efficiency associated with the P2 resources. The UE may prepare a report indicating one or more characteristics of a candidate UE beam or a serving UE beam. The report may indicate the last measurement associated with the serving UE beam and / or the last measurement associated with the candidate UE beam for the current measurement occasion. In some aspects, the UE may process the spectral efficiency associated with the P2 resources for a beam selection process. Processing the spectral efficiency may include performing filtering operations, biasing operations, and / or thresholding operations. The UE may initiate a beam selection process based at least in part on processing the spectral efficiency associated with the P2 resources.

[0074] As described above, UE beam selection using SSB may be limited due to the rank 1 nature of SSB. Similarly, CSI-RS used for ACQ may be of limited use for UE beam selection because the k0 timing offset may be equal to zero, making it difficult for the UE to predict the conditions in advance and program different beams. In contrast, CSI-RS used for P2 may allow the UE to have enough time to program different beams in advance. Using the techniques and apparatus described herein, the UE can borrow the CSI-RS for P2 resources to perform UE beam scanning. This may be referred to as "beam jittering" herein. This may enable the UE to take advantage of the beam scanning benefits of the CSI-RS for P2 without using other reference signals (such as CSI-RS for P3) that the network may not support.

[0075] As indicated above, Figure 4 are provided as examples. Other examples can be found in the Figure 4 The examples described are different.

[0076] Figure 5 5 is a diagram illustrating an example 500 of UE beam management according to the present disclosure. UE 120 may communicate with network node 110.

[0077] As indicated by reference numeral 505, UE 120 may identify multiple candidate UE beams for measuring CSI-RS for P2 resources. P2 resources may be resource elements corresponding to CSI-RS to be measured during a P2 procedure. As described herein, CSI-RS for P2 resources may be configured based at least in part on transmitter-side (e.g., network node 110) beam refinement, wherein beam scanning occurs at the transmitter by keeping the receiver beam (e.g., UE 120 beam) fixed. UE 120 may identify multiple candidate beams based at least in part on information shared between UE 120 and network node 110. For example, UE 120 may identify multiple candidate beams based at least in part on SSB measurements associated with multiple candidate beams. In some cases, multiple candidate beams may be identified based at least in part on multiple candidate beams having the highest SSB measurements for all beams (or a subset of all beams) for communication between UE 120 and network node 110.

[0078] As shown by reference numeral 510, UE 120 may identify a time slot or symbol in which a CSI-RS for P2 resources is to be scheduled. For example, UE 120 may identify a time slot in which a CSI-RS for P2 resources is to be scheduled, may identify a symbol in which a CSI-RS for P2 resources is to be scheduled, or may identify a time slot or symbol in which a CSI-RS for P2 resources is to be scheduled. In some aspects, the CSI-RS for P2 resources may be communicated using semi-persistent transmission or aperiodic transmission and / or may be communicated via MAC-CE or via DCI.

[0079] As shown by reference numeral 515, UE 120 may schedule a candidate UE beam or a serving UE beam on the identified time slot or symbol. In some aspects, the candidate UE beam may be a selected candidate UE beam in the plurality of candidate UE beams identified in conjunction with reference numeral 505. The serving UE beam may be an existing beam used between UE 120 and network node 110. In some aspects, scheduling the candidate UE beam or the serving UE beam on the time slot or symbol may be based at least in part on a random selection or semi-random selection of the candidate UE beam and the serving UE beam, such as a round-robin selection. For example, UE 120 may alternate between selecting candidate beam A, candidate beam B, candidate beam C, and serving beam S. For another example, UE 120 may alternate between selecting candidate beams and serving beams, such as candidate beam A, serving beam S, candidate beam B, serving beam S, candidate beam C, and serving beam S, and so on.

[0080] UE 120 may measure spectral efficiency associated with the P2 resources, as indicated by reference numeral 520. For example, UE 120 may measure spectral efficiency associated with the candidate UE beams and / or the serving UE beams on the P2 resources.

[0081] As indicated by reference numeral 525, UE 120 may generate a report. In some aspects, the report may indicate a last (e.g., most recent) measurement on the serving UE beam. In some aspects, the report may indicate a last measurement on a candidate UE beam for the current measurement occasion. In some aspects, the report may indicate both a last measurement on the serving UE beam and a last measurement on the candidate UE beam for the current measurement occasion, or may indicate some combination of a last measurement on the serving UE beam and a last measurement on the candidate UE beam for the current measurement occasion.

[0082] As shown in reference numeral 530, UE 120 may process the measured spectral efficiency. For example, UE 120 may process the measured spectral efficiency for the purpose of serving beam selection. In some aspects, the spectral efficiency may be processed separately for each rank. For example, the spectral efficiency may be processed separately for rank 1 and for rank 2, etc. In some aspects, there may be an existing fusion process across two values ​​(e.g., two rank values) that can be reused to process the spectral efficiency. For example, the fusion process may include combining (e.g., folding) the spectral efficiency between two ranks. In some aspects, processing the spectral efficiency may include at least one of a filtering operation, a biasing operation, and / or a thresholding operation, etc.

[0083] As indicated by reference numeral 535, UE 120 may initiate a beam selection process based at least in part on the spectral efficiency measurement. For example, UE 120 may select a beam from a plurality of candidate UE beams and a serving UE beam based at least in part on a beam having a best (e.g., highest) spectral efficiency measurement on the P2 resources. UE 120 may send an indication associated with the result of the beam selection process, such as an indication of the selected beam, to network node 110.

[0084] In some aspects, when a UE beam is scheduled for a CSI-RS symbol, the scheduling of the UE beam may be extended for the duration of the entire time slot (e.g., the time slot including the symbol). In one example, PDCCH and PDSCH may be scheduled in the same time slot. PDSCH may be multiplexed with CSI-RS on the same symbol (e.g., using frequency division multiplexing (FDM)). In this case, using the same beam throughout the time slot may allow the use of PDSCH DMRS (which may be located on another symbol in the same time slot) to provide better channel estimation. In some aspects, this feature may be enabled at least in part based on symbol prediction being inaccurate (or less accurate than a threshold). In some aspects, if the CSI-RS time slot prediction is inaccurate (e.g., due to network node scheduling changes), the UE 120 may use the same beam for multiple time slots in a time window around the predicted time slot. This may require the UE 120 to use the same beam for all channels in the time window. These channels may include one or more of a PDCCH, a PDSCH, a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a sounding reference signal (SRS), and / or a CSI-RS, among others.

[0085] As described herein, UE beam selection using SSB may be limited due to the rank 1 nature of SSB. Similarly, CSI-RS used for ACQ may have limited use for UE beam selection because the k0 timing offset may be equal to zero, making it difficult for the UE to predict conditions in advance and program different beams. In contrast, CSI-RS for P2 may allow the UE to have enough time to program different beams in advance. Using the techniques and apparatus described herein, UE 120 can borrow CSI-RS for P2 resources to perform UE beam scanning. This can enable UE 120 to take advantage of the beam scanning benefits of CSI-RS for P2 without using other reference signals (such as CSI-RS for P3) that the network may not support.

[0086] As indicated above, Figure 5 are provided as examples. Other examples can be found in the Figure 5 The examples described are different.

[0087] Figure 6 is a diagram illustrating an example process 600, performed, for example, by a UE, according to the present disclosure. Example process 600 is an example in which a UE (eg, UE 120) performs operations associated with UE beam management.

[0088] like Figure 6As shown, in some aspects, process 600 may include identifying a time slot or symbol in which a CSI-RS for a P2 resource is to be scheduled (block 610). For example, a UE (e.g., using Figure 7 The communication manager 140 and / or identification component 708 depicted in FIG. 7 may identify a time slot or symbol in which a CSI-RS for a P2 resource is to be scheduled, as described above.

[0089] like Figure 6 As further shown, in some aspects, process 600 may include scheduling candidate UE beams or serving UE beams for a time slot or symbol (block 620). Figure 7 The communication manager 140 and / or scheduling component 710 depicted in FIG. 7 may schedule candidate UE beams or serving UE beams for time slots or symbols, as described above.

[0090] like Figure 6 As further shown, in some aspects, process 600 may include measuring the spectral efficiency associated with the P2 resources (block 630). Figure 7 The communication manager 140 and / or the measurement component 712 depicted in FIG. 1 may measure the spectral efficiency associated with the P2 resources, as described above.

[0091] like Figure 6 As further shown in FIG. 6 , in some aspects, process 600 may include preparing a report indicating one or more characteristics of a candidate UE beam or a serving UE beam (block 640). For example, a UE (e.g., using Figure 7 The communication manager 140 and / or reporting component 714 depicted in FIG. 1 may prepare a report indicating one or more characteristics of a candidate UE beam or a serving UE beam, as described above.

[0092] Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0093] In a first aspect, process 600 includes identifying a plurality of candidate UE beams for measuring CSI-RS for P2 resources.

[0094] In a second aspect, alone or in combination with the first aspect, the report indicates at least one of a last measurement associated with a serving UE beam or a last measurement associated with a candidate UE beam during a current measurement occasion.

[0095] In a third aspect, alone or in combination with one or more of the first and second aspects, the report indicates a last measurement associated with the serving UE beam and a last measurement associated with the candidate UE beam during a current measurement occasion.

[0096] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, process 600 includes sending an indication of a report to a network entity, the indication indicating one or more characteristics of a candidate UE beam or a serving UE beam.

[0097] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, process 600 includes processing spectral efficiency associated with P2 resources for a beam selection process.

[0098] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, processing the spectral efficiency includes processing the spectral efficiency separately for each rank of a plurality of ranks.

[0099] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, processing the spectral efficiency includes performing a filtering operation, a biasing operation, or a thresholding operation.

[0100] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, process 600 includes initiating a beam selection process based at least in part on processing spectral efficiency associated with P2 resources.

[0101] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, identifying a time slot or symbol in which a CSI-RS for P2 resources is to be scheduled includes predicting a time slot or symbol in which a CSI-RS for P2 resources is to be scheduled.

[0102] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, scheduling a candidate UE beam or a service UE beam for a time slot or a symbol includes: scheduling a candidate UE beam or a service UE beam for a symbol, and extending the scheduling of the candidate UE beam or the service UE beam for the symbol to the duration of the time slot.

[0103] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the time slot includes a physical downlink control channel and a physical downlink shared channel, and the physical downlink shared channel is frequency division multiplexed on the same symbol as the CSI-RS.

[0104] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the process 600 includes communicating using a selected beam from among the candidate UE beams or the serving UE beams for a plurality of time slots in a time window around the time slot.

[0105] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, using selective beams for communicating for multiple time slots within a time window around a time slot includes using selective beams for communicating for all subchannels within a time window around a time slot.

[0106] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the P2 resources are resources configured for P2 beam management.

[0107] although Figure 6 An example block diagram of process 600 is shown, but in some aspects, process 600 may include Figure 6 Additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the process 600. Additionally or alternatively, two or more of the blocks in the process 600 may be performed in parallel.

[0108] Figure 7 700 is a diagram of an example apparatus 700 for wireless communication according to the present disclosure. The apparatus 700 may be a UE, or the UE may include the apparatus 700. In some aspects, the apparatus 700 includes a receiving component 702 and a transmitting component 704 that may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, the apparatus 700 may communicate with another apparatus 706 (such as a UE, a base station, or another wireless communication device) using the receiving component 702 and the transmitting component 704. As further shown, the apparatus 700 may include a communication manager 140. The communication manager 140 may include one or more of an identification component 708, a scheduling component 710, a measurement component 712, a reporting component 714, a processing component 716, and / or a selection component 718, etc.

[0109] In some aspects, the apparatus 700 may be configured to perform Figure 5 Additionally or alternatively, the apparatus 700 may be configured to perform one or more processes described herein, such as Figure 6 The process 600. In some aspects, Figure 7 The device 700 and / or one or more components shown may include a combination of Figure 2 Additionally or alternatively, Figure 7 One or more of the components shown may be combined with Figure 2 Additionally or alternatively, one or more components in the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes that are stored in a non-transitory computer-readable medium and can be executed by a controller or processor to perform the function or operation of the component.

[0110] The receiving component 702 may receive communications from the device 706, such as reference signals, control information, data communications, or combinations thereof. The receiving component 702 may provide the received communications to one or more other components of the device 700. In some aspects, the receiving component 702 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the device 700. In some aspects, the receiving component 702 may include combining Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of a described UE.

[0111] The transmitting component 704 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 706. In some aspects, one or more other components of the device 700 may generate communications and may provide the generated communications to the transmitting component 704 for transmission to the device 706. In some aspects, the transmitting component 704 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to the device 706. In some aspects, the transmitting component 704 may include combining Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described UE. In some aspects, the transmit component 704 can be co-located with the receive component 702 in a transceiver.

[0112] The identification component 708 may identify the time slot or symbol for which the CSI-RS for the P2 resource is to be scheduled. The scheduling component 710 may schedule the candidate UE beam or the serving UE beam for the time slot or symbol. The measurement component 712 may measure the spectral efficiency associated with the P2 resource. The reporting component 714 may prepare a report indicating one or more characteristics of the candidate UE beam or the serving UE beam.

[0113] The identifying component 708 may identify a plurality of candidate UE beams for measuring CSI-RS for the P2 resource. The sending component 704 may send an indication of a report to a network entity, the indication indicating one or more characteristics of the candidate UE beam or the serving UE beam. The processing component 716 may process the spectral efficiency associated with the P2 resource for a beam selection process. The selecting component 718 may initiate a beam selection process based at least in part on processing the spectral efficiency associated with the P2 resource. The receiving component 702 and / or the sending component 704 may communicate using a selected beam from the candidate UE beam or the serving UE beam for a plurality of time slots in a time window around the time slot.

[0114] Figure 7 The number and arrangement of components shown are provided as examples. Figure 7 The components shown may include additional components, fewer components, different components, or components arranged in a different manner. Figure 7 Two or more components shown may be implemented in a single component, or Figure 7 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Figure 7 The illustrated set of component(s) may be described as being executable by Figure 7 Another collection of components shown performs one or more functions.

[0115] The following provides an overview of some aspects of the disclosure:

[0116] Aspect 1: A method of wireless communication performed by a user equipment (UE), the method comprising: identifying a time slot or symbol in which a channel state information reference signal (CSI-RS) for a procedure 2 (P2) resource is to be scheduled; scheduling a candidate UE beam or a serving UE beam for the time slot or the symbol; measuring a spectral efficiency associated with the P2 resource; and preparing a report indicating one or more characteristics of the candidate UE beam or the serving UE beam.

[0117] Aspect 2: According to the method of aspect 1, the method also includes identifying multiple candidate UE beams for measuring the CSI-RS for the P2 resources.

[0118] Aspect 3: A method according to any one of Aspects 1 to 2, wherein the report indicates at least one of the last measurement associated with the serving UE beam or the last measurement associated with the candidate UE beam during a current measurement occasion.

[0119] Aspect 4: A method according to aspect 3, wherein the report indicates the last measurement associated with the serving UE beam and the last measurement associated with the candidate UE beam during the current measurement occasion.

[0120] Aspect 5: According to any one of aspects 1 to 4, the method also includes sending an indication of the report to a network entity, the indication indicating the one or more characteristics of the candidate UE beam or the serving UE beam.

[0121] Aspect 6: The method according to any one of aspects 1 to 5, further comprising processing the spectral efficiency associated with the P2 resources for a beam selection process.

[0122] Aspect 7: The method according to aspect 6, wherein processing the spectral efficiency includes processing the spectral efficiency separately for each rank of a plurality of ranks.

[0123] Aspect 8: The method according to aspect 6, wherein processing the spectral efficiency includes performing a filtering operation, a biasing operation, or a thresholding operation.

[0124] Aspect 9: The method according to aspect 6, further comprising initiating the beam selection process based at least in part on processing the spectral efficiency associated with the P2 resources.

[0125] Aspect 10: The method according to any one of Aspects 1 to 9, wherein identifying the time slot or the symbol in which the CSI-RS for the P2 resource is to be scheduled comprises predicting the time slot or the symbol in which the CSI-RS for the P2 resource is to be scheduled.

[0126] Aspect 11: A method according to any one of Aspects 1 to 10, wherein scheduling the candidate UE beam or the serving UE beam for the time slot or the symbol includes scheduling the candidate UE beam or the serving UE beam for the symbol, and extending the scheduling of the candidate UE beam or the serving UE beam for the symbol to the duration of the time slot.

[0127] Aspect 12: The method according to aspect 11, wherein the time slot includes a physical downlink control channel and a physical downlink shared channel, and wherein the physical downlink shared channel is frequency division multiplexed on the same symbol as the CSI-RS.

[0128] Aspect 13: According to the method of any one of Aspects 1 to 12, the method also includes communicating using a selected beam among the candidate UE beams or the serving UE beams for multiple time slots in a time window around the time slot.

[0129] Aspect 14: The method according to aspect 13, wherein communicating using the selected beam for the multiple time slots within the time window around the time slot includes communicating using the selected beam for all subchannels within the time window around the time slot.

[0130] Aspect 15: The method according to any one of Aspects 1 to 14, wherein the P2 resources are resources configured for P2 beam management.

[0131] Aspect 16: An apparatus for performing wireless communications at a device, 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 one or more of the methods described in Aspects 1 to 15.

[0132] Aspect 17: A device for wireless communication, comprising: a memory; and one or more processors, the one or more processors coupled to the memory, the one or more processors configured to execute the method according to one or more of aspects 1 to 15.

[0133] Aspect 18: An apparatus for wireless communication, the apparatus comprising: at least one component for performing the method according to one or more of aspects 1 to 15.

[0134] Aspect 19: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1 to 15.

[0135] Aspect 20: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform one or more of the methods described in aspects 1 to 15.

[0136] While the foregoing disclosure provides illustration and description, it is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of these aspects.

[0137] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other names, "software" should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads implemented, procedures and / or functions, etc. As used herein, a "processor" is implemented in a combination of hardware and / or hardware and software. It will be clear that the systems and / or methods described herein can be implemented by different forms of hardware and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit various aspects. Therefore, the operation and behavior of the system and / or method are not described herein with reference to specific software codes, because those skilled in the art will understand that software and hardware can be designed to implement the system and / or method based at least in part on the description herein.

[0138] As used herein, "satisfying a threshold" may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0139] Although the specific combination of features is set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features can be combined by not specifically narrating in the claims and / or not disclosed in the specification. The disclosure of various aspects includes each dependent claim combined with each other claim in the claim set. As used herein, the phrase "at least one of" the list of items refers to any combination of these items (it includes a single member). As an example, "at least one of a, b or c" is intended to cover a, b, c, a+b, a+c, b+c and a+b+c, and any combination with multiple identical elements (for example, a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c and c+c+c, or any other ordering of a, b and c).

[0140] Any element, action or instruction used herein should not be interpreted as key or necessary unless clearly stated. In addition, as used herein, the articles "one" and "a kind of" are intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the article "said" is intended to include one or more items connected to the article "said", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items, and can be used interchangeably with "one or more". If only one item is intended to be referred to, the phrase "only one" or similar terms are used. Moreover, as used herein, the term "having" etc. is intended to be an open term, which does not limit the elements they modify (for example, "having" A elements can also have B). In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used in a series is intended to be open-ended and used interchangeably with "and / or" unless expressly stated otherwise (eg, if used in conjunction with "either" or "only one of").

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: Memory; and one or more processors coupled to the memory and configured to: Identify the time slot or symbol in which a channel state information reference signal (CSI-RS) for a procedure 2 (P2) resource is to be scheduled; Scheduling a candidate UE beam or a serving UE beam for the time slot or the symbol; measuring a spectral efficiency associated with the P2 resources; as well as Prepare a report indicating one or more characteristics of the candidate UE beam or the serving UE beam.

2. The apparatus of claim 1, wherein the one or more processors are further configured to identify a plurality of candidate UE beams for measuring the CSI-RS for the P2 resources.

3. The apparatus of claim 1, wherein the report indicates at least one of a last measurement associated with the serving UE beam or a last measurement associated with the candidate UE beam during a current measurement occasion.

4. The apparatus of claim 3, wherein the report indicates the last measurement associated with the serving UE beam and the last measurement associated with the candidate UE beam during the current measurement occasion.

5. The apparatus of claim 1, wherein the one or more processors are further configured to send an indication of the report to a network entity, the indication indicating the one or more characteristics of the candidate UE beam or the serving UE beam.

6. The apparatus of claim 1, wherein the one or more processors are further configured to process the spectral efficiency associated with the P2 resources for a beam selection process.

7. The apparatus of claim 6, wherein the one or more processors to process the spectral efficiency are configured to process the spectral efficiency separately for each rank of a plurality of ranks.

8. The apparatus of claim 6, wherein the one or more processors to process the spectral efficiency are configured to perform a filtering operation, a biasing operation, or a thresholding operation.

9. The apparatus of claim 6, wherein the one or more processors are further configured to initiate the beam selection process based at least in part on processing the spectral efficiency associated with the P2 resources.

10. The apparatus of claim 1, wherein identifying the time slot or the symbol at which the CSI-RS for the P2 resource is to be scheduled comprises predicting the time slot or the symbol at which the CSI-RS for the P2 resource is to be scheduled.

11. An apparatus according to claim 1, wherein the one or more processors for scheduling the candidate UE beam or the serving UE beam for the time slot or the symbol are configured to schedule the candidate UE beam or the serving UE beam for the symbol, and extend the scheduling of the candidate UE beam or the serving UE beam for the symbol to the duration of the time slot.

12. The apparatus of claim 11, wherein the time slot comprises a physical downlink control channel and a physical downlink shared channel, and wherein the physical downlink shared channel is frequency division multiplexed on the same symbol as the CSI-RS.

13. The apparatus of claim 1, wherein the one or more processors are further configured to communicate using a selected beam among the candidate UE beams or the serving UE beams for a plurality of time slots in a time window around the time slot.

14. The apparatus of claim 13, wherein the one or more processors for communicating using the selected beam for the multiple time slots in the time window around the time slot are configured to communicate using the selected beam for all subchannels within the time window around the time slot.

15. A method of wireless communication performed by a user equipment (UE), the method comprising: Identify the time slot or symbol in which a channel state information reference signal (CSI-RS) for a procedure 2 (P2) resource is to be scheduled; Scheduling a candidate UE beam or a serving UE beam for the time slot or the symbol; measuring a spectral efficiency associated with the P2 resources; as well as Prepare a report indicating one or more characteristics of the candidate UE beam or the serving UE beam.

16. The method of claim 15, further comprising identifying a plurality of candidate UE beams for measuring the CSI-RS for the P2 resources.

17. The method of claim 15, wherein the report indicates at least one of a last measurement associated with the serving UE beam or a last measurement associated with the candidate UE beam during a current measurement occasion.

18. The method of claim 17, wherein the report indicates the last measurement associated with the serving UE beam and the last measurement associated with the candidate UE beam during the current measurement occasion.

19. The method of claim 15, further comprising sending an indication of the report to a network entity, the indication indicating the one or more characteristics of the candidate UE beam or the serving UE beam.

20. The method of claim 15, further comprising processing the spectral efficiency associated with the P2 resources for a beam selection process.

21. The method of claim 20, wherein processing the spectral efficiency comprises processing the spectral efficiency separately for each rank of a plurality of ranks.

22. The method of claim 20, wherein processing the spectral efficiency comprises performing a filtering operation, a biasing operation, or a thresholding operation.

23. The method of claim 20, further comprising initiating the beam selection process based at least in part on processing the spectral efficiency associated with the P2 resources.

24. The method of claim 15, wherein identifying the time slot or the symbol at which the CSI-RS for the P2 resources is to be scheduled comprises predicting the time slot or the symbol at which the CSI-RS for the P2 resources is to be scheduled.

25. The method of claim 15, wherein scheduling the candidate UE beam or the serving UE beam for the time slot or the symbol comprises scheduling the candidate UE beam or the serving UE beam for the symbol, and extending the scheduling of the candidate UE beam or the serving UE beam for the symbol to the duration of the time slot.

26. The method of claim 25, wherein the time slot includes a physical downlink control channel and a physical downlink shared channel, and wherein the physical downlink shared channel is frequency division multiplexed on the same symbol as the CSI-RS.

27. The method of claim 15, further comprising communicating using a selected beam from among the candidate UE beams or the serving UE beams for a plurality of time slots in a time window around the time slot.

28. The method of claim 27, wherein communicating using the selected beam for the plurality of time slots within the time window around the time slot comprises communicating using the selected beam for all subchannels within the time window around the time slot.

29. A non-transitory computer readable medium storing an instruction set for wireless communication, the instruction set comprising: One or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to: Identify the time slot or symbol in which a channel state information reference signal (CSI-RS) for a procedure 2 (P2) resource is to be scheduled; Scheduling a candidate UE beam or a serving UE beam for the time slot or the symbol; measuring a spectral efficiency associated with the P2 resources; as well as Prepare a report indicating one or more characteristics of the candidate UE beam or the serving UE beam.

30. An apparatus for wireless communication, the apparatus comprising: means for identifying a time slot or symbol in which a channel state information reference signal (CSI-RS) for a procedure 2 (P2) resource is to be scheduled; means for scheduling a candidate user equipment (UE) beam or a serving UE beam for the time slot or the symbol; means for measuring spectral efficiency associated with said P2 resources; and Means for preparing a report indicating one or more characteristics of the candidate UE beam or the serving UE beam.

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