Hybrid Uplink Reference Signal Beam Management

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive a beam management configuration from a base station, the beam management configuration indicating a set of resources to be used by the UE to transmit a plurality of reference signals, the plurality of reference signals including at least one sounding reference signal (SRS) and at least one demodulation reference signal (DMRS) to be used for beam refinement during an uplink beam management occasion; and transmit at least one SRS and at least one DMRS to the base station at least in part based on the beam management configuration. Many other aspects are also provided.

Description

[0001] Cross - Reference to Related Applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 994,042, titled "MIXED UPLINK REFERENCE SIGNAL BEAM MANAGEMENT", filed on March 24, 2020, and U.S. Non - Provisional Patent Application No. 17 / 184,291, titled "MIXED UPLINK REFERENCE SIGNAL BEAM MANAGEMENT", filed on February 24, 2021, which are hereby expressly incorporated herein by reference. Field of the Disclosure

[0003] Aspects of the present disclosure generally relate to wireless communication and techniques and apparatus for mixed uplink reference signal beam management. Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ a multiple access technology that is capable of supporting communication with multiple user devices (UEs) 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 an enhanced set of the Universal Mobile Telecommunications System (UMTS) mobile standards promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include multiple base stations (BSs) capable of supporting communication with multiple user equipment (UEs). The UEs may communicate with the BSs via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit - receive point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0006] The above multi-access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate at the urban, national, regional, or even global level. NR, which can also be referred to as 5G, is an enhanced set of the LTE mobile standard released by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, reducing costs, enhancing services, leveraging new spectrums, and better integrating with other open standards that use orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) (CP-OFDM) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also referred to as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. With the continuous growth of the demand for mobile broadband access, further improvements in LTE, NR, and other wireless access technologies remain highly useful. Summary of the Invention

[0007] In some aspects, a method for wireless communication performed by a user equipment (UE) may include: receiving, from a base station, a beam management configuration that indicates a resource set to be used by the UE to transmit multiple reference signals, the multiple reference signals including at least one sounding reference signal (SRS) and at least one demodulation reference signal (DMRS) to be used for beam refinement during an uplink beam management occasion; and transmitting, at least partially based on the beam management configuration, at least one SRS and at least one DMRS to the base station.

[0008] In some aspects, a method for wireless communication performed by a base station may include: transmitting, to a UE, a beam management configuration that indicates a resource set to be used by the UE to transmit at least one SRS and at least one DMRS to be used for beam refinement during an uplink beam management occasion; and receiving, at least partially based on the beam management configuration, at least one SRS and at least one DMRS from the UE.

[0009] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive, from a base station, a beam management configuration that indicates a resource set to be used by the UE to transmit multiple reference signals, the multiple reference signals including at least one SRS and at least one DMRS to be used for beam refinement during an uplink beam management occasion; and transmit, at least partially based on the beam management configuration; and at least one SRS and at least one DMRS to the base station.

[0010] In some aspects, a base station for wireless communication can include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors can be configured to: send a beam management configuration to a UE, the beam management configuration indicating a resource set to be used by the UE to transmit at least one SRS and at least one DMRS that will be used for beam refinement during an uplink beam management occasion; and receive at least one SRS and at least one DMRS from the UE, at least in part based on the beam management configuration.

[0011] In some aspects, a non-transitory computer-readable medium can store one or more instructions for wireless communication. When the one or more instructions are executed by one or more processors of a UE, the one or more processors can be caused to: receive a beam management configuration from a base station, the beam management configuration indicating a resource set to be used by the UE to transmit a plurality of reference signals, the plurality of reference signals including at least one SRS and at least one DMRS that will be used for beam refinement during an uplink beam management occasion; and transmit at least one SRS and at least one DMRS to the base station, at least in part based on the beam management configuration.

[0012] In some aspects, a non-transitory computer-readable medium can store one or more instructions for wireless communication. When the one or more instructions are executed by one or more processors of a base station, the one or more processors can be caused to: send a beam management configuration to a UE, the beam management configuration indicating a resource set to be used by the UE to transmit at least one SRS and at least one DMRS that will be used for beam refinement during an uplink beam management occasion; and receive at least one SRS and at least one DMRS from the UE, at least in part based on the beam management configuration.

[0013] In some aspects, an apparatus for wireless communication can include: means for receiving a beam management configuration from a base station, the beam management configuration indicating a resource set to be used by the apparatus to transmit a plurality of reference signals, the plurality of reference signals including at least one SRS and at least one DMRS that will be used for beam refinement during an uplink beam management occasion; and means for transmitting at least one SRS and at least one DMRS to the base station, at least in part based on the beam management configuration.

[0014] In some aspects, a component for wireless communication can include: means for sending a beam management configuration to a UE, the beam management configuration indicating a resource set to be used by the UE to transmit at least one SRS and at least one DMRS that will be used for beam refinement during an uplink beam management occasion; and means for receiving at least one SRS and at least one DMRS from the UE, at least in part based on the beam management configuration.

[0015] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems that are described herein with reference to the accompanying drawings and the specification and shown in the drawings and the specification.

[0016] The features and technical advantages of examples in accordance with the present disclosure have been outlined rather broadly above so that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and method of operation, and associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each drawing is provided for the purpose of illustration and description, and not as a definition of the limits of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To enable a more particular understanding of the foregoing features of the present disclosure, reference may be had to the aspects in which some of the aspects are illustrated in the accompanying drawings. It should be noted, however, that the drawings illustrate only certain typical aspects of the present disclosure and are therefore not to be considered as limiting its scope, as the description may admit other equally effective aspects. The same reference numerals in different drawings may denote the same or similar elements.

[0018] Figure 1 is a diagram illustrating an example of a wireless network in accordance with the present disclosure.

[0019] Figure 2 is a diagram illustrating an example of a base station communicating with a user equipment (UE) in a wireless network in accordance with the present disclosure.

[0020] Figure 3 is a diagram illustrating an example of hybrid uplink reference signal beam management in accordance with the present disclosure.

[0021] Figure 4 is a diagram illustrating an example process, such as performed by a user equipment, in accordance with the present disclosure.

[0022] Figure 5 is a diagram illustrating an example process, such as performed by a base station, in accordance with the present disclosure. DETAILED DESCRIPTION

[0023] Aspects of the present disclosure will now be described more fully with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the guidance herein, those skilled in the art should understand that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, which may be implemented independently of any other aspect of the present disclosure 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 a method. Additionally, the scope of the present disclosure is intended to cover such a device or method that practices using other structures, functions, or structures and functions in addition to or different from those of the aspects of the present 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 claims.

[0024] Several aspects of a telecommunications system will now be introduced with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and are illustrated in the drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0025] It should be noted that although terms commonly associated with 5G or NR radio access technology (RAT) may be used herein to describe aspects, aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G).

[0026] Figure 1 FIG. 100 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. Among other examples, the wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network. The wireless network 100 may include a plurality of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0027] The BS can provide communication coverage for macro cells, pico cells, femto cells, and / or another type of cell. A macro cell can cover a relatively large geographical area (e.g., with a radius of several kilometers) and can allow unrestricted access for subscribed UEs. A pico cell can cover a relatively small geographical area and can allow unrestricted access for subscribed UEs. A femto cell can cover a relatively small geographical area (e.g., a home) and can allow restricted access for UEs associated with that femto cell (e.g., UEs in a Closed Subscriber Group (CSG)). The BS of a macro cell can be referred to as a macro BS. The BS of a pico cell can be referred to as a pico BS. The BS of a femto cell can be referred to as a femto BS or a home BS. In Figure 1 the example shown, BS 110a can be the macro BS of macro cell 102a, BS 110b can be the pico BS of pico cell 102b, and BS 110c can be the femto BS of femto cell 102c. The BS can support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" can be used interchangeably herein.

[0028] In some aspects, the cell is not necessarily stationary, and the geographical area of the cell can move according to the position of the mobile BS. In some aspects, the BSs can be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces (such as direct physical connections or virtual networks) using any suitable transmission network.

[0029] The wireless network 100 can also include relay stations. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and send data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that can relay transmissions for other UEs. In Figure 1 the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS110a and UE 120d. A relay BS can also be referred to as a relay station, a relay base station, a repeater, etc.

[0030] The wireless network 100 can be a heterogeneous network that includes different types of BSs, such as macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs can have different transmission power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS can have a high transmission power level (e.g., 5 watts to 40 watts), while pico BSs, femto BSs, and relay BSs can have lower transmission power levels (e.g., 0.1 watt to 2 watts).

[0031] The network controller 130 can be coupled to the set of BSs and can provide coordination and control for these BSs. The network controller 130 can communicate with the BSs via the backhaul. The BSs can also communicate with each other directly or indirectly via a wireless or wired backhaul.

[0032] UEs 120 (e.g., 120a, 120b, 120c) can be dispersed in the wireless network 100, and each UE can be stationary or mobile. The UEs can also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. The UEs can be cellular phones (e.g., smart phones), personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, laptop computers, cordless phones, wireless local loop (WLL) stations, tablet computers, cameras, gaming devices, netbooks, smartbooks, ultrabooks, medical devices or equipment, biosensors / devices, wearable devices (smart watches, smart clothing, smart glasses, smart wristbands, smart jewelry (e.g., smart rings, smart bracelets)), entertainment devices (e.g., music or video devices, or satellite radios), vehicle components or sensors, smart meters / sensors, industrial manufacturing devices, global positioning system devices, or any other suitable devices configured to communicate via wireless or wired media.

[0033] Some UEs can be considered machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. For example, MTC UEs and eMTC UEs include robots, drones, remote devices, sensors, meters, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node can provide connectivity for a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as narrowband IoT (NB-IoT) devices. Some UEs can be considered customer premise equipment (CPE). The UE 120 can be included within a housing that houses components of the UE 120 such as a processor component and / or a memory component. In some aspects, the processor component and the memory component can be coupled together. For example, the processor component (e.g., one or more processors) and the memory component (e.g., a memory) can be operably coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0034] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, an NR or 5G RAT network can be deployed.

[0035] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., without using the base station 110 as an intermediary for communicating with each other). For example, the UE 120 can communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which can include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol), and / or mesh network. In such cases, the UE120 can perform scheduling operations, resource selection operations, and / or other operations performed by the base station 110 described elsewhere herein.

[0036] Devices of the wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc. based on frequency or wavelength. For example, devices of the wireless network 100 can communicate using an operating band having a first frequency range (FR1) that can span from 410 MHz to 7.125 GHz, and / or can communicate using an operating band having a second frequency range (FR2) that can span from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a part of FR1 is greater than 6 GHz, FR1 is often referred to as the "sub-6 GHz" band. Similarly, FR2 is often referred to as the "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise specifically stated, it should be understood that if used herein, terms such as "sub-6 GHz" can broadly represent frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specifically stated, it should be understood that if used herein, terms such as "millimeter wave" can broadly represent frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is expected that the frequencies included in FR1 and FR2 can be modified, and the techniques described herein apply to those modified frequency ranges.

[0037] As described above, Figure 1 is provided as an example. Other examples may be different from those Figure 1 described.

[0038] Figure 2 FIG. 200 is a diagram illustrating an example 200 of a base station 110 communicating with a UE 120 in a wireless network 100 according to the present disclosure. The base station 110 may be equipped with T antennas 234a to 234t, and the UE 120 may be equipped with R antennas 252a to 252r, where, generally, T≥1 and R≥1.

[0039] At the base station 110, a transmit processor 220 may receive data for one or more UEs from a data source 212, select one or more modulation and coding schemes (MCSs) for each UE at least in part based on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE at least in part based on the selected MCS(s) for the UE, and provide data symbols for all UEs. The transmit processor 220 may also 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 also generate reference symbols for reference signals (e.g., cell-specific reference signal (CRS) or demodulation reference signal (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols (if applicable) and may provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 may process the corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may also further process the output sample stream (e.g., convert to analog, amplify, filter, and upconvert) to obtain a downlink signal. The T downlink signals from the modulators 232a to 232t may be transmitted via the T antennas 234a to 234t, respectively.

[0040] At the UE 120, antennas 252a through 252r may receive downlink signals from the base station 110 and / or other base stations and may provide the received signals to demodulators (DEMOD) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide the decoded data for the UE 120 to the data sink 260, and provide the 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 reference signal received power (RSRP) parameters, received signal strength indicator (RSSI) parameters, reference signal received quality (RSRQ) parameters, and / or CQI parameters, etc. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0041] 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 base station 110 via the communication unit 294.

[0042] Antennas (e.g., antennas 234a through 234t and / or antennas 252a through 252r) may include one or more antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays or may be included in one or more antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays, etc. The antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays may include one or more antenna elements. The antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays may include a collection of coplanar antenna elements and / or a collection of non-coplanar antenna elements. The antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays may include antenna elements within a single housing and / or antenna elements within multiple housings. The antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays may include one or more antenna elements coupled to one or more transmit and / or receive components (such as Figure 2 one or more components) of

[0043] 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 also generate reference symbols for one or more reference signals. Symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 (if applicable), further processed by the demodulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of the UE 120 may be included in the modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of (one or more) antennas 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (e.g., as referenced Figures 3 - 5 described).

[0044] At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antennas 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain the 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 base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communication. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of the base station 110 may be included in the modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of (one or more) antennas 234, modulator and / or demodulator 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 perform aspects of any of the methods described herein (e.g., as referenced Figures 3 - 5 described).

[0045] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 any other component of Figure 2 can perform one or more techniques associated with hybrid uplink reference signal beam management, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 4 any other component of Figure 5 can perform or direct the operation of, for example, Figure 4 procedure 400 of Figure 5 procedure 500 of

[0046] and / or other procedures described herein. Memories 242 and 282 can store data and program codes of base station 110 and UE 120, respectively. In some aspects, memories 242 and / or memory 282 can include non-transitory computer-readable media storing one or more instructions (e.g., codes and / or program codes) for wireless communication. For example, when one or more instructions are executed by one or more processors of base station 110 and / or UE 120 (e.g., directly executed, or after compilation, conversion, and / or interpretation), one or more processors, UE 120, and / or base station 110 can perform or direct the operation of, for example, Figure 2 procedure 400 of

[0047] procedure 500 of Figure 5 and / or other procedures described herein. In some aspects, executing the instructions can include running the instructions, converting the instructions, compiling the instructions, and / or interpreting the instructions, etc.

[0046] In some aspects, UE 120 can include: components for receiving a beam management configuration from a base station, the beam management configuration indicating a resource set of multiple reference signals to be used by the UE to transmit at least one sounding reference signal (SRS) and at least one DMRS for beam refinement during an uplink beam management occasion; components for transmitting at least one SRS and at least one DMRS to the base station at least partially based on the beam management configuration, etc. In some aspects, these components can include one or more components of UE 120 described in conjunction with Figure 2 such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0047] In some aspects, the base station 110 may include: components for sending beam management configuration to the UE, the beam management configuration indicating a resource set to be used by the UE to send at least one SRS and at least one DMRS for beam refinement during an uplink beam management occasion; components for receiving at least one SRS and at least one DMRS from the UE at least in part based on the beam management configuration, etc. In some aspects, such components may include one or more components of the base station 110 described in conjunction with Figure 2 such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.

[0048] Although Figure 2 the boxes in are shown as different components, the functions described above for these boxes may be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described for transmit processor 264, receive processor 258, and / or TX MIMO processor 266 may be performed by or under the control of controller / processor 280.

[0049] As described above, Figure 2 is provided as an example. Other examples may be different from those described with respect to Figure 2 description.

[0050] As described above in conjunction with Figure 1 the base station may serve different UEs of different categories, support different UEs with different capabilities, etc. For example, the base station may serve a first category of UEs with lower advanced capabilities (e.g., low tier UEs, lower-capability UEs, UEs with reduced capabilities, NR-Lite UEs, etc.) and a second category of UEs with more advanced capabilities (e.g., higher-capability UEs, high tier UEs, premium UEs, NR UEs, legacy UEs, etc.). In such a case, compared to the second category of UEs, the first category of UEs may have a reduced feature set.

[0051] For example, UEs of a first category may support a lower maximum MCS than UEs of a second category (e.g., quadrature phase shift keying (QPSK) etc. compared to 256 quadrature amplitude modulation (QAM) etc.), may support a lower transmit power than UEs of a second category, may have a less advanced beamforming capability than UEs of a second category, may not be able to communicate on as wide a maximum bandwidth part as UEs of a second category, may have fewer antennas (e.g., transmit antennas and / or receive antennas) and / or antenna ports than UEs of a second category, may not be able to perform full-duplex communication, may have a lower power class than UEs of a second category, may have a reduced bandwidth capacity, and so on. Thus, one consideration in deploying a wireless network is to compensate for different UE capabilities. For example, a base station serving UEs with different capabilities may implement functions to mitigate or limit performance degradation (e.g., potential reduced coverage) that may be caused by UEs with reduced complexity.

[0052] Beam management is typically performed using repeated SRS resources, which can be resource-intensive, especially when considering the limited resources available to UEs with a reduced bandwidth capacity compared to other devices. Some schemes use DMRS to assist with uplink beam management. DMRS-based beam management can be used to reduce the need to configure multiple and / or frequent SRS resource sets, since DMRS is already available. However, DMRS-based beam management typically involves repeating the DMRS resources up to two times. Two DMRSs can be used for beam management of two beams, but may not be sufficient for the management of more than two beams (e.g., four beams etc.).

[0053] Some aspects described herein relate to techniques and apparatuses for beam management using hybrid uplink reference signals. In some aspects, at least one SRS and at least one DMRS are used for beam management. Using SRS and DMRS can help reduce the number of SRS resources required for beam management, thereby increasing the number of possible beams that can be scanned without configuring as many SRS resources, and so on. In some aspects, the base station may send a beam management configuration to the UE, the beam management configuration indicating a resource set that will be used by the UE to transmit a combination of SRS resources and DMRS resources for beam management. In some aspects, the (multiple) SRS and the (multiple) DMRS may be transmitted using different beams. In this way, the aspects can help with the refinement of the uplink beam resources of the UE. In some aspects, the base station may request the UE to transmit all the SRS resources and DMRS resources on a single beam. In this way, the aspects can help with the refinement of the beam resources of the base station.

[0054] Figure 3FIG. is a diagram illustrating an example 300 of hybrid uplink reference signal beam management in accordance with the present disclosure. As shown, UE 120 and base station 110 may communicate with each other.

[0055] As shown by reference numeral 305, base station 110 may transmit a beam management configuration and UE 120 may receive the beam management configuration, which indicates a resource set to be used by UE 120 to transmit multiple reference signals. The multiple reference signals may include at least one SRS and at least one DMRS to be used for beam refinement during an uplink beam management occasion.

[0056] In some aspects, the beam management configuration may be carried in a radio resource control (RRC) message, downlink control information (DCI), etc. As shown by reference numeral 310, the resource set may include a periodic SRS resource set. In some aspects, the resource set may include a semi-persistent SRS resource set, an aperiodic SRS resource set, etc. As shown by reference numeral 315, the resource set may include a DMRS resource set corresponding to one or more physical uplink shared channel (PUSCH) grants. In some aspects, the beam management configuration may include DCI that includes an explicit indication of at least one SRS, at least one DMRS, etc. In some aspects, the resource set may include a DMRS resource set corresponding to a physical uplink control channel (PUCCH), a DMRS resource set corresponding to a configured grant (CG) configuration, etc.

[0057] As shown by reference numeral 320, the resource set may include a time domain resource set that indicates a window corresponding to an uplink beam management (BM) occasion within which hybrid reference signal (RS) transmission (shown as "hybrid RS BM window") occurs. As shown, the window may be associated with a time period that starts before resource authorization. In some aspects, the window may be associated with a time period that starts after resource authorization, before a CG occasion, after a CG occasion, before a PUCCH transmission, after a PUCCH transmission, before a DCI trigger, after a DCI trigger, etc.

[0058] As shown by reference numeral 325, at least partially based on the beam management configuration, UE 120 may transmit at least one SRS and at least one DMRS and base station 110 may receive at least one SRS and at least one DMRS. In some aspects, base station 110 may transmit a beam management trigger indication and UE 120 may receive the beam management trigger indication. At least partially based on receiving the beam management trigger indication, the at least one SRS and at least one DMRS may be transmitted for beam management. In some aspects, the beam management trigger indication may be carried in an RRC message or DCI.

[0059] As shown in the figure, the at least one DMRS may be transmitted on a PUSCH, PUCCH, etc. In some aspects, the at least one DMRS may include multiple DMRSs. In some aspects, the multiple DMRSs may be at least partially based on repeated uplink transmissions, multiple uplink resource authorizations, etc. In some aspects, the multiple reference signals may be transmitted using multiple beams, and the UE 120 may use at least one SRS and at least one DMRS to assist in the refinement of one or more transmission beams associated with the UE 120.

[0060] As indicated by reference numeral 330, the base station 110 may transmit an SRI configuration corresponding to an SRS resource indicator (SRI), and the UE 120 may receive the SRI configuration. In some aspects, the SRI may include at least one identifier associated with at least one DMRS. In some aspects, the SRI configuration may be carried in an RRC message, DCI, etc. In some aspects, the SRI may indicate a selected beam selected by the base station at least partially based on the signal quality associated with the selected beam. In some aspects, the SRI may use at least one index associated with at least one DMRS to indicate the selected beam.

[0061] According to various aspects, the at least one SRS and the at least one DMRS may be transmitted using a single beam to allow the base station 110 to assist in the refinement of one or more receiving beams associated with the base station 110. In some aspects, the base station 110 may transmit a request for the UE 120 to transmit the at least one SRS and the at least one DMRS using a single beam, and the UE 120 may receive the request. In some aspects, the request may be carried in DCI. In some aspects, the beam management configuration may include a repetition indication that indicates that multiple SRSs are to be transmitted on a single beam. At least partially based on the repetition indication, the at least one DMRS may be transmitted on a single beam.

[0062] As described above, Figure 3 is provided as an example. Other examples may be different from those Figure 3 described.

[0063] Figure 4 is a diagram illustrating an example process 400 performed by a UE, etc., according to the present disclosure. The example process 400 is an example of operations performed by a UE (e.g., UE 120, etc.) associated with hybrid uplink reference signal beam management.

[0064] As Figure 4As shown, in some aspects, process 400 may include receiving a beam management configuration from a base station, the beam management configuration indicating a resource set to be used by the UE to transmit a plurality of reference signals (block 410), the plurality of reference signals including at least one SRS and at least one DMRS to be used for beam refinement during an uplink beam management occasion. For example, as described above, the UE (e.g., using the receiving processor 258, the controller / processor 280, the memory 282, etc.) may receive a beam management configuration from the base station, the beam management configuration indicating a resource set to be used by the UE to transmit a plurality of reference signals, the plurality of reference signals including at least one SRS and at least one DMRS to be used for beam refinement during an uplink beam management occasion.

[0065] As Figure 4 Further shown, in some aspects, process 400 may include transmitting at least one SRS and at least one DMRS to the base station, at least in part based on the beam management configuration (block 420). For example, as described above, the UE (e.g., using the transmitting processor 264, the controller / processor 280, the memory 282, etc.) may transmit at least one SRS and at least one DMRS to the base station at least in part based on the beam management configuration.

[0066] Process 400 may include additional aspects, such as any single aspect described below or any combination of multiple aspects, and / or in combination with one or more other processes described elsewhere herein.

[0067] In a first aspect, at least one DMRS is transmitted on the PUCCH.

[0068] In a second aspect, alone or in combination with the first aspect, at least one DMRS is transmitted on the PUSCH.

[0069] In a third aspect, alone or in combination with one or more of the first and second aspects, the beam management configuration is carried in an RRC message.

[0070] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the resource set includes at least one of a periodic SRS resource set, a semi-persistent SRS resource set, or a combination thereof.

[0071] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the resource set includes at least one of a DMRS resource set corresponding to the PUCCH, a DMRS resource set corresponding to a CG configuration, or a combination thereof.

[0072] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the beam management configuration is carried in a DCI.

[0073] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the resource set includes at least one of a periodic SRS resource set, a semi-persistent SRS resource set, an aperiodic SRS resource set, or a combination thereof.

[0074] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the resource set includes a DMRS resource set corresponding to one or more PUSCH authorizations.

[0075] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, at least one DMRS includes multiple DMRSs.

[0076] In a tenth aspect, either alone or in combination with the ninth aspect, the multiple DMRSs are at least partially based on at least one of repeated uplink transmissions, multiple uplink resource authorizations, or a combination thereof.

[0077] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, procedure 400 includes receiving a beam management trigger indication, wherein at least one SRS and at least one DMRS are transmitted for beam management at least partially based on the received beam management trigger indication.

[0078] In a twelfth aspect, either alone or in combination with the eleventh aspect, the beam management trigger indication is carried in an RRC message or DCI.

[0079] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the resource set includes a time-domain resource set indicating a window corresponding to an uplink beam management occasion.

[0080] In a fourteenth aspect, either alone or in combination with the thirteenth aspect, the window is associated with a time period starting before a resource authorization, after a resource authorization, before a CG occasion, after a CG occasion, before a PUCCH transmission, after a PUCCH transmission, before a DCI trigger, or after a DCI trigger.

[0081] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, the beam management configuration includes downlink control information that includes an explicit indication of at least one of at least one SRS, at least one DMRS, or a combination thereof.

[0082] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, at least one SRS and at least one DMRS are transmitted using a single beam.

[0083] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, at least one SRS and at least one DMRS allow a base station to assist in the refinement of one or more receive beams associated with the base station.

[0084] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, procedure 400 includes receiving, from a base station, a request for a UE to transmit at least one SRS and at least one DMRS using a single beam, where the request is carried in downlink control information.

[0085] In a nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, a beam management configuration includes a repetition indication that indicates that multiple SRSs will be transmitted on a single beam.

[0086] In a twentieth aspect, alone or in combination with the nineteenth aspect, the at least one DMRS is transmitted on a single beam, at least in part based on the repetition indication.

[0087] In a twenty - first aspect, alone or in combination with one or more of the first to twentieth aspects, multiple reference signals are transmitted using multiple beams.

[0088] In a twenty - second aspect, alone or in combination with one or more of the first to twenty - first aspects, a UE will use at least one SRS and at least one DMRS to assist in the refinement of one or more transmit beams associated with the UE.

[0089] In a twenty - third aspect, alone or in combination with one or more of the first to twenty - second aspects, procedure 400 includes receiving, from a base station, an SRI configuration corresponding to an SRI, where the SRI configuration includes at least one identifier associated with at least one DMRS.

[0090] In a twenty - fourth aspect, alone or in combination with the twenty - third aspect, the SRI configuration is carried in an RRC message or DCI.

[0091] In a twenty - fifth aspect, alone or in combination with one or more of the twenty - third to twenty - fourth aspects, procedure 400 includes receiving an SRI, where the SRI indicates a selected beam, and where the selected beam is selected by the base station at least in part based on the signal quality associated with the selected beam.

[0092] In a twenty - sixth aspect, alone or in combination with the twenty - fifth aspect, the SRI uses at least one index associated with at least one DMRS to indicate the selected beam.

[0093] Although Figure 4illustrates example blocks of process 400, but in some aspects, process 400 may include more blocks, fewer blocks, different blocks, or differently arranged blocks than those Figure 4 shown. Additionally or alternatively, two or more blocks of process 400 may be performed in parallel.

[0094] Figure 5 is a diagram illustrating an example process 500 performed, for example, by a base station according to the present disclosure. Example process 500 is an example of operations performed by a base station (e.g., base station 110, etc.) associated with hybrid uplink reference signal beam management.

[0095] As Figure 5 shown, in some aspects, process 500 may include sending a beam management configuration to a UE, the beam management configuration indicating a resource set to be used by the UE to transmit at least one SRS and at least one DMRS that will be used for beam refinement during an uplink beam management occasion (block 510). For example, as described above, a base station (e.g., using a transmission processor 220, a controller / processor 240, a memory 242, etc.) may send a beam management configuration to the UE, the beam management configuration indicating a resource set to be used by the UE to transmit at least one SRS and at least one DMRS that will be used for beam refinement during an uplink beam management occasion.

[0096] As Figure 5 further shown, in some aspects, process 500 may include receiving at least one SRS and at least one DMRS from the UE at least partially based on the beam management configuration (block 520). For example, as described above, a base station (e.g., using a reception processor 238, a controller / processor 240, a memory 242, etc.) may receive at least one SRS and at least one DMRS from the UE at least partially based on the beam management configuration.

[0097] Process 500 may include additional aspects, such as any single aspect or any combination of multiple aspects described below, and / or in combination with one or more other processes described elsewhere herein.

[0098] In a first aspect, at least one DMRS is transmitted on a PUCCH.

[0099] In a second aspect, alone or in combination with the first aspect, at least one DMRS is transmitted on a PUSCH.

[0100] In a third aspect, alone or in combination with one or more of the first and second aspects, the beam management configuration is carried in an RRC message.

[0101] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the resource set includes at least one of a periodic SRS resource set, a semi-persistent SRS resource set, or a combination thereof.

[0102] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the resource set includes at least one of a DMRS resource set corresponding to PUCCH, a DMRS resource set corresponding to a CG configuration, or a combination thereof.

[0103] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the beam management configuration is carried in DCI.

[0104] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the resource set includes at least one of a periodic SRS resource set, a semi-persistent SRS resource set, an aperiodic SRS resource set, or a combination thereof.

[0105] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the resource set includes a DMRS resource set corresponding to one or more PUSCH authorizations.

[0106] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, at least one DMRS includes multiple DMRSs.

[0107] In a tenth aspect, either alone or in combination with the ninth aspect, the multiple DMRSs are at least partially based on at least one of repeated uplink transmissions, multiple uplink resource authorizations, or a combination thereof.

[0108] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, procedure 500 includes sending a beam management trigger indication to the UE, wherein at least one SRS and at least one DMRS are sent for beam management at least partially based on the UE receiving the beam management trigger indication.

[0109] In a twelfth aspect, either alone or in combination with the eleventh aspect, the beam management trigger indication is carried in an RRC message or DCI.

[0110] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the resource set includes a time-domain resource set indicating a window corresponding to an uplink beam management occasion.

[0111] In a fourteenth aspect, either alone or in combination with the thirteenth aspect, the window is associated with a time period that starts before resource authorization, after resource authorization, before the CG occasion, after the CG occasion, before PUCCH transmission, after PUCCH transmission, before DCI triggering, or after DCI triggering.

[0112] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, the beam management configuration includes a DCI that includes an explicit indication of at least one SRS, at least one DMRS, or at least one combination thereof.

[0113] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, at least one SRS and at least one DMRS are transmitted using a single beam.

[0114] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, at least one SRS and at least one DMRS allow the base station to assist in the refinement of one or more receive beams associated with the base station.

[0115] In an eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, procedure 500 includes sending a request to the UE to transmit at least one SRS and at least one DMRS using a single beam, where the request is carried in a DCI.

[0116] In a nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, the beam management configuration includes a repetition indication that indicates that multiple SRSs will be transmitted on a single beam.

[0117] In a twentieth aspect, either alone or in combination with the nineteenth aspect, at least one DMRS is transmitted on a single beam, at least partially based on the repetition indication.

[0118] In a twenty - first aspect, either alone or in combination with one or more of the first to twentieth aspects, multiple reference signals are transmitted using multiple beams.

[0119] In a twenty - second aspect, either alone or in combination with one or more of the first to twenty - first aspects, the UE will use at least one SRS and at least one DMRS to assist in the refinement of one or more transmit beams associated with the UE.

[0120] In a twenty - third aspect, either alone or in combination with one or more of the first to twenty - second aspects, procedure 500 includes sending an SRI configuration corresponding to an SRI to the UE, where the SRI configuration includes at least one identifier associated with at least one DMRS.

[0121] In a twenty-fourth aspect, alone or in combination with the twenty-third aspect, the SRI configuration is carried in an RRC message or DCI.

[0122] In a twenty-fifth aspect, alone or in combination with one or more of the twenty-third to twenty-fourth aspects, procedure 500 includes transmitting an SRI, where the SRI indicates a selected beam, and where the selected beam is selected by the base station at least in part based on the signal quality associated with the selected beam.

[0123] In a twenty-sixth aspect, alone or in combination with the twenty-fifth aspect, the SRI uses at least one index associated with at least one DMRS to indicate the selected beam.

[0124] Although Figure 5 example boxes of procedure 500 are shown, in some aspects, procedure 500 may include more boxes, fewer boxes, different boxes, or boxes in a different arrangement than Figure 5 those shown. Additionally or alternatively, two or more boxes of procedure 500 may be executed in parallel.

[0125] An overview of some aspects of the present disclosure is provided below:

[0126] Aspect 1: A method of wireless communication performed by a user equipment (UE), including: receiving, from a base station, a beam management configuration that indicates a resource set to be used by the UE to transmit a plurality of reference signals, the plurality of reference signals including at least one sounding reference signal (SRS) and at least one demodulation reference signal (DMRS) to be used for beam refinement during an uplink beam management occasion; and transmitting, at least in part based on the beam management configuration, at least one SRS and at least one DMRS to the base station.

[0127] Aspect 2: The method according to aspect 1, where at least one DMRS is transmitted on a physical uplink control channel.

[0128] Aspect 3: The method according to any one of aspects 1 or 2, where at least one DMRS is transmitted on a physical uplink shared channel.

[0129] Aspect 4: The method according to any one of aspects 1 to 3, where the beam management configuration is carried in a radio resource control message.

[0130] Aspect 5: The method according to any one of aspects 1 to 4, where the resource set includes at least one of a periodic SRS resource set, a semi-persistent SRS resource set, or a combination thereof.

[0131] Aspect 6: The method according to any one of Aspects 1 to 5, wherein the resource set includes at least one of a DMRS resource set corresponding to a physical uplink control channel, a DMRS resource set corresponding to a configured grant configuration, or a combination thereof.

[0132] Aspect 7: The method according to any one of Aspects 1 to 6, wherein the beam management configuration is carried in downlink control information.

[0133] Aspect 8: The method according to any one of Aspects 1 to 7, wherein the resource set includes at least one of a periodic SRS resource set, a semi-persistent SRS resource set, an aperiodic SRS resource set, or a combination thereof.

[0134] Aspect 9: The method according to any one of Aspects 1 to 8, wherein the resource set includes a DMRS resource set corresponding to one or more physical uplink shared channel grants.

[0135] Aspect 10: The method according to any one of Aspects 1 to 9, wherein at least one DMRS includes a plurality of DMRSs.

[0136] Aspect 11: The method according to Aspect 10, wherein the plurality of DMRSs are at least partially based on at least one of repeated uplink transmissions, a plurality of uplink resource grants, or a combination thereof.

[0137] Aspect 12: The method according to any one of Aspects 1 to 11, the method further comprising: receiving a beam management trigger indication, wherein at least one SRS and at least one DMRS are transmitted for beam management at least partially based on receiving the beam management trigger indication.

[0138] Aspect 13: The method according to Aspect 12, wherein the beam management trigger indication is carried in a radio resource control message or downlink control information.

[0139] Aspect 14: The method according to any one of Aspects 1 to 13, wherein the resource set includes a time domain resource set indicating a window corresponding to an uplink beam management occasion.

[0140] Aspect 15: The method according to Aspect 14, wherein the window is associated with a time period starting before a resource grant, after a resource grant, before a configured grant (CG) occasion, after a CG occasion, before a physical uplink control channel (PUCCH) transmission, after a PUCCH transmission, before a downlink control information (DCI) trigger, or after a DCI trigger.

[0141] Aspect 16: The method according to any one of Aspects 1 to 15, wherein the beam management configuration includes downlink control information that includes an explicit indication of at least one of at least one SRS, at least one DMRS, or a combination thereof.

[0142] Aspect 17: The method according to any one of Aspects 1 to 16, wherein the at least one SRS and the at least one DMRS are transmitted using a single beam.

[0143] Aspect 18: The method according to any one of Aspects 1 to 17, wherein the at least one SRS and the at least one DMRS allow the base station to assist in the refinement of one or more receive beams associated with the base station.

[0144] Aspect 19: The method according to any one of Aspects 1 to 18, further comprising receiving, from the base station, a request for the UE to transmit at least one SRS and at least one DMRS using a single beam, wherein the request is carried in the downlink control information.

[0145] Aspect 20: The method according to any one of Aspects 1 to 19, wherein the beam management configuration includes a repetition indication that indicates that multiple SRSs will be transmitted on a single beam.

[0146] Aspect 21: The method according to Aspect 20, wherein at least one DMRS is transmitted on a single beam at least partially based on the repetition indication.

[0147] Aspect 22: The method according to any one of Aspects 1 to 21, wherein multiple reference signals are transmitted using multiple beams.

[0148] Aspect 23: The method according to any one of Aspects 1 to 22, wherein the UE will use at least one SRS and at least one DMRS to assist in the refinement of one or more transmit beams associated with the UE.

[0149] Aspect 24: The method according to any one of Aspects 1 to 23, the method further comprising receiving, from the base station, an SRS resource indicator (SRI) configuration corresponding to an SRI, the SRI including at least one identifier associated with at least one DMRS.

[0150] Aspect 25: The method according to Aspect 24, wherein the SRI configuration is carried in a radio resource configuration message or downlink control information.

[0151] Aspect 26: The method according to either Aspect 24 or 25, further comprising receiving an SRI, wherein the SRI indicates a selected beam, wherein the selected beam is selected by the base station at least partially based on the signal quality associated with the selected beam.

[0152] Aspect 27: The method according to aspect 26, wherein the SRI uses at least one index associated with at least one DMRS to indicate the selected beam.

[0153] Aspect 28: A method for wireless communication performed by a base station, including: sending a beam management configuration to a user equipment (UE), the beam management configuration indicating a resource set to be used by the UE for sending at least one sounding reference signal (SRS) and at least one demodulation reference signal (DMRS) to be used for beam refinement during an uplink beam management occasion; and receiving, at least in part based on the beam management configuration, at least one SRS and at least one DMRS from the UE.

[0154] Aspect 29: The method according to aspect 28, wherein at least one DMRS is sent on a physical uplink control channel.

[0155] Aspect 30: The method according to any one of aspects 28 or 29, wherein at least one DMRS is sent on a physical uplink shared channel.

[0156] Aspect 31: The method according to any one of aspects 28 to 30, wherein the beam management configuration is carried in a radio resource control message.

[0157] Aspect 32: The method according to any one of aspects 28 to 31, wherein the resource set includes at least one of a periodic SRS resource set, a semi-persistent SRS resource set, or a combination thereof.

[0158] Aspect 33: The method according to any one of aspects 28 to 32, wherein the resource set includes at least one of a DMRS resource set corresponding to a physical uplink control channel, a DMRS resource set corresponding to a configured grant configuration, or a combination thereof.

[0159] Aspect 34: The method according to any one of aspects 28 to 33, wherein the beam management configuration is carried in downlink control information.

[0160] Aspect 35: The method according to any one of aspects 28 to 34, wherein the resource set includes at least one of a periodic SRS resource set, a semi-persistent SRS resource set, an aperiodic SRS resource set, or a combination thereof.

[0161] Aspect 36: The method according to any one of aspects 28 to 35, wherein the resource set includes a DMRS resource set corresponding to one or more physical uplink shared channel authorizations.

[0162] Aspect 37: The method according to any one of aspects 28 to 36, wherein at least one DMRS includes a plurality of DMRSs.

[0163] Aspect 38: The method according to aspect 37, wherein the plurality of DMRSs are at least partially based on at least one of repeated uplink transmissions, a plurality of uplink resource authorizations, or a combination thereof.

[0164] Aspect 39: The method according to any one of aspects 28 to 38, the method further comprising: transmitting a beam management trigger indication to the UE, wherein at least partially based on the UE receiving the beam management trigger indication, the at least one SRS and the at least one DMRS are transmitted for beam management.

[0165] Aspect 40: The method according to aspect 39, wherein the beam management trigger indication is carried in a radio resource control message or downlink control information.

[0166] Aspect 41: The method according to any one of aspects 28 to 40, wherein the resource set includes a time-domain resource set indicating a window corresponding to an uplink beam management occasion.

[0167] Aspect 42: The method according to aspect 41, wherein the window is associated with a time period starting before a resource authorization, after a resource authorization, before a configured grant (CG) occasion, after a CG occasion, before a physical uplink control channel (PUCCH) transmission, after a PUCCH transmission, before a downlink control information (DCI) trigger, or after a DCI trigger.

[0168] Aspect 43: The method according to any one of aspects 28 to 42, wherein the beam management configuration includes downlink control information, the downlink control information including an explicit indication of at least one of the at least one SRS, the at least one DMRS, or a combination thereof.

[0169] Aspect 44: The method according to any one of aspects 28 to 43, wherein the at least one SRS and the at least one DMRS are transmitted using a single beam.

[0170] Aspect 45: The method according to any one of aspects 28 to 44, wherein the at least one SRS and the at least one DMRS allow the base station to contribute to the refinement of one or more receive beams associated with the base station.

[0171] Aspect 46: The method according to any one of aspects 28 to 45, the method further comprising sending a request to the UE to transmit the at least one SRS and the at least one DMRS using a single beam, wherein the request is carried in downlink control information.

[0172] Aspect 47: The method according to any one of aspects 28 to 46, wherein the beam management configuration includes a repetition indication indicating that a plurality of SRSs will be transmitted on a single beam.

[0173] Aspect 48: The method according to aspect 47, wherein at least one DMRS is transmitted on a single beam, at least partially based on a repetition indication.

[0174] Aspect 49: The method according to any one of aspects 28 to 48, wherein at least one SRS and at least one DMRS are transmitted using multiple beams.

[0175] Aspect 50: The method according to any one of aspects 28 to 49, wherein the UE will use at least one SRS and at least one DMRS to assist in the refinement of one or more transmission beams associated with the UE.

[0176] Aspect 51: The method according to any one of aspects 28 to 50, the method further comprising sending to the UE an SRS resource indicator (SRI) configuration corresponding to an SRI, the SRI including at least one identifier associated with at least one DMRS.

[0177] Aspect 52: The method according to aspect 51, wherein the SRI configuration is carried in a radio resource configuration message or downlink control information.

[0178] Aspect 53: The method according to either aspect 51 or 52, further comprising sending an SRI, wherein the SRI indicates a selected beam, and the selected beam is selected by the base station at least partially based on the signal quality associated with the selected beam.

[0179] Aspect 54: The method according to aspect 53, wherein the SRI indicates the selected beam using at least one index associated with at least one DMRS.

[0180] Aspect 55: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform the method according to one or more of aspects 1 to 27.

[0181] Aspect 56: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method according to one or more of aspects 1 to 27.

[0182] Aspect 57: An apparatus for wireless communication, comprising at least one component for performing the method according to one or more of aspects 1 to 27.

[0183] Aspect 58: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform the method according to one or more of aspects 1 to 27.

[0184] Aspect 59: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1 to 27.

[0185] Aspect 60: An apparatus for wireless communication at a device, including 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 the method according to one or more of Aspects 28 to 54.

[0186] Aspect 61: A device for wireless communication, including a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more of Aspects 28 to 54.

[0187] Aspect 62: An apparatus for wireless communication, including at least one component for performing the method of one or more of Aspects 28 to 54.

[0188] Aspect 63: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform the method of one or more of Aspects 28 to 54.

[0189] Aspect 64: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 28 to 54.

[0190] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit these aspects to the precise forms disclosed. Modifications and variations can be made in light of the above disclosure, or can be obtained from practice of these aspects.

[0191] As used herein, the term "component" is intended to be broadly construed as hardware, and / or a combination of hardware and software. Software shall be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable programs, execution threads, processes, and / or functions, among other examples, whether referring to software, firmware, middleware, microcode, hardware description language, or others. As used herein, a processor is implemented in hardware, and / or a combination of hardware and software. It is clear that the systems and / or methods described herein can be implemented in different forms of hardware, and / or a combination of hardware and software. The actual specific control hardware or software code used to implement these systems and / or methods does not limit these aspects. Thus, the operations and behaviors of the systems and / or methods are described herein without reference to specific software code, and it should be understood that the software and hardware can be designed at least in part based on the description herein to implement the systems and / or methods.

[0192] As used herein, depending on the context, meeting a threshold can refer to a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0193] Even if specific combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the aspects. In fact, many of these features can be combined in ways not specifically recited in the claims and / or not disclosed in the specification. Although each of the dependent claims listed below may directly depend on only one claim, the disclosure of the aspects includes the combination of each dependent claim with every other claim in the claim set. As used herein, the phrase "at least one" in reference to a list of items refers to any combination of those items, including a single member. For 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, as well as any combination having multiple identical elements (e.g., 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 other orders of a, b, and c).

[0194] Unless explicitly described, any element, act, or instruction used herein should not be construed as critical or essential. Additionally, as used herein, "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more." Further, as used herein, "the" is intended to include one or more items associated with "the" and may be used interchangeably with "one or more." Additionally, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and may be used interchangeably with "one or more." If referring to only one item, the phrase "only one" or similar language is used. Additionally, as used herein, the terms "has," "have," "having," etc. are intended to be open-ended terms. Further, unless otherwise explicitly stated, the phrase "based on" is intended to mean "at least partially based on." Additionally, unless otherwise explicitly stated, as used herein, the term "or" is inclusive when used in a series and may be used interchangeably with "and / or" (e.g., if used in conjunction with "either" or "only one").

Claims

1. A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors operatively coupled to the memory and configured to: receive a beam management configuration from a network entity, the beam management configuration indicating a resource set that includes a combination of: a sounding reference signal (SRS) resource set, and a demodulation reference signal (DMRS) resource set, wherein the beam management configuration includes a repetition indication that indicates that multiple SRSs will be transmitted on a single beam; and use the resource set indicated by the beam management configuration to transmit, during an uplink beam management occasion, multiple reference signals including at least one SRS and at least one DMRS to the network entity, wherein at least one DMRS is transmitted on the single beam at least partially based on the repetition indication.

2. The UE according to claim 1, wherein The at least one DMRS is transmitted on at least one of a physical uplink control channel or a physical uplink shared channel.

3. The UE according to claim 1, wherein, The beam management configuration is carried in a radio resource control message, and wherein the resource set includes at least one of a periodic SRS resource set or a semi-persistent SRS resource set.

4. The UE according to claim 1, wherein, The beam management configuration is carried in a radio resource control message, and wherein the resource set includes at least one of a DMRS resource set corresponding to a physical uplink control channel, a DMRS resource set corresponding to a configured grant configuration, or a combination thereof.

5. The UE according to claim 1, wherein, The beam management configuration is carried in downlink control information, and wherein the resource set includes at least one of a periodic SRS resource set, a semi-persistent SRS resource set, an aperiodic SRS resource set, or a combination thereof.

6. The UE according to claim 1, wherein, The beam management configuration is carried in downlink control information, and wherein the resource set includes a DMRS resource set corresponding to one or more physical uplink shared channel grants.

7. The UE according to claim 1, wherein The at least one DMRS includes multiple DMRSs, and wherein the multiple DMRSs are at least partially based on at least one of repeated uplink transmissions, multiple uplink resource grants, or a combination thereof.

8. The UE according to claim 1, wherein The one or more processors are further configured to: receive a beam management trigger indication, wherein at least one SRS and the at least one DMRS are transmitted for beam management at least partially based on receiving the beam management trigger indication.

9. The UE according to claim 1, wherein The resource set includes a time-domain resource set indicating a window corresponding to the uplink beam management occasion.

10. The UE according to claim 9, wherein, The window is associated with a time period starting before a resource grant, after a resource grant, before a configured grant (CG) occasion, after a CG occasion, before a physical uplink control channel (PUCCH) transmission, after a PUCCH transmission, before a downlink control information (DCI) trigger, or after a DCI trigger.

11. The UE according to claim 1, wherein, The beam management configuration includes downlink control information that includes an explicit indication of at least one of the at least one SRS, the at least one DMRS, or a combination thereof.

12. The UE according to claim 1, wherein, The at least one SRS and the at least one DMRS are transmitted using a single beam.

13. The UE according to claim 1, wherein, The one or more processors are further configured to receive, from the network entity, a request for the UE to transmit the at least one SRS and the at least one DMRS using a single beam, where the request is carried in downlink control information.

14. The UE according to claim 1, wherein, The plurality of reference signals are transmitted using a plurality of beams.

15. The UE according to claim 1, wherein, The UE will use the at least one SRS and the at least one DMRS to assist in the refinement of one or more transmission beams associated with the UE.

16. The UE according to claim 1, wherein, The one or more processors are further configured to receive, from the network entity, an SRS resource indicator (SRI) configuration corresponding to an SRI, the SRI including at least one identifier associated with the at least one DMRS.

17. The UE according to claim 16, wherein The one or more processors are further configured to receive the SRI, where the SRI indicates a selected beam, and the selected beam is selected by the network entity at least in part based on the signal quality associated with the selected beam.

18. A network entity for wireless communication, comprising: a memory; and one or more processors operably coupled to the memory and configured to: send a beam management configuration to a user equipment (UE), the beam management configuration indicating a resource set that includes a combination of: a sounding reference signal (SRS) resource set, and a demodulation reference signal (DMRS) resource set, where the beam management configuration includes a repetition indication indicating that multiple SRSs will be transmitted on a single beam; and receive at least one SRS and at least one DMRS during an uplink beam management occasion using the resource set indicated by the beam management configuration, where the at least one DMRS is transmitted via the single beam at least in part based on the repetition indication.

19. The network entity according to claim 18, wherein, The resource set includes at least one of a DMRS resource set corresponding to a physical uplink control channel, a DMRS resource set corresponding to a configured grant configuration, a DMRS resource set corresponding to one or more physical uplink shared channel grants, a periodic SRS resource set, a semi-persistent SRS resource set, or an aperiodic SRS resource set.

20. The network entity according to claim 18, wherein, The one or more processors are further configured to: send a beam management trigger indication to the UE, where at least in part based on the UE receiving the beam management trigger indication, the at least one SRS and the at least one DMRS are transmitted for beam management.

21. The network entity according to claim 20, wherein, The resource set includes a time-domain resource set indicating a window corresponding to the uplink beam management occasion, and where the window is associated with a time period starting before a resource grant, after a resource grant, before a configured grant (CG) occasion, after a CG occasion, before a physical uplink control channel (PUCCH) transmission, after a PUCCH transmission, before a downlink control information (DCI) trigger, or after a DCI trigger.

22. The network entity according to claim 18, wherein, The beam management configuration includes downlink control information that includes an explicit indication of at least one of the at least one SRS, the at least one DMRS, or a combination thereof.

23. The network entity according to claim 18, wherein, The one or more processors are further configured to send a request to the UE to transmit the at least one SRS and the at least one DMRS using a single beam, where the request is carried in downlink control information.

24. The network entity according to claim 18, wherein The one or more processors are further configured to send an SRS resource indicator (SRI) configuration corresponding to an SRI to the UE, where the SRI includes at least one identifier associated with the at least one DMRS.

25. The network entity according to claim 24, wherein, The one or more processors are further configured to send the SRI, where the SRI indicates a selected beam, and the selected beam is selected by the network entity at least in part based on the signal quality associated with the selected beam.

26. A method for a user equipment (UE) to perform wireless communication, including: Receiving, from a network entity, a beam management configuration that indicates a resource set, where the resource set includes a combination of: A sounding reference signal (SRS) resource set, and A demodulation reference signal (DMRS) resource set, where the beam management configuration includes a repetition indication that indicates that multiple SRSs will be transmitted on a single beam; and Using the resource set indicated by the beam management configuration to send at least one SRS and at least one DMRS to the network entity during an uplink beam management occasion, where at least in part based on the repetition indication, the at least one DMRS is transmitted on the single beam.

27. A method for a network entity to perform wireless communication, including: Sending a beam management configuration to a user equipment (UE), where the beam management configuration indicates a resource set, and the resource set includes a combination of: A sounding reference signal (SRS) resource set, and A demodulation reference signal (DMRS) resource set, where the beam management configuration includes a repetition indication that indicates that multiple SRSs will be transmitted on a single beam; and Using the resource set indicated by the beam management configuration to receive at least one SRS and at least one DMRS during an uplink beam management occasion, where at least in part based on the repetition indication, the at least one DMRS is conveyed via the single beam.

28. An apparatus for wireless communication at a user equipment (UE), including: Means for receiving, from a network entity, a beam management configuration that indicates a resource set, where the resource set includes a combination of: A sounding reference signal (SRS) resource set, and A demodulation reference signal (DMRS) resource set, where the beam management configuration includes a repetition indication that indicates that multiple SRSs will be transmitted on a single beam; and Means for using the resource set indicated by the beam management configuration to send, during an uplink beam management occasion, multiple reference signals including at least one SRS and at least one DMRS to the network entity, where at least in part based on the repetition indication, the at least one DMRS is transmitted on the single beam.

29. An apparatus for wireless communication at a network entity, including: A component for sending beam management configuration to a user equipment (UE), the beam management configuration indicating a resource set, the resource set including a combination of the following: A sounding reference signal (SRS) resource set, and A demodulation reference signal (DMRS) resource set, wherein the beam management configuration includes a repetition indication, the repetition indication indicating that multiple SRSs will be sent on a single beam; and A component for receiving at least one SRS and at least one DMRS during an uplink beam management occasion using the resource set indicated by the beam management configuration, wherein at least partially based on the repetition indication, the at least one DMRS is transmitted via the single beam.

30. A non-transitory computer-readable storage medium for wireless communication at a user equipment (UE), storing instructions that cause a processor to perform the following operations: Receive a beam management configuration from a network entity, the beam management configuration indicating a resource set, the resource set including a combination of the following: A sounding reference signal (SRS) resource set, and A demodulation reference signal (DMRS) resource set, Among them, the beam management configuration includes a repetition indication, the repetition indication indicating that multiple SRSs will be sent on a single beam; and Use the resource set indicated by the beam management configuration to send multiple reference signals including at least one SRS and at least one DMRS to the network entity during an uplink beam management occasion, wherein at least partially based on the repetition indication, the at least one DMRS is sent on the single beam.

31. A non-transitory computer-readable storage medium for wireless communication at a network entity, storing instructions that cause a processor to perform the following operations: Send a beam management configuration to a user equipment (UE), the beam management configuration indicating a resource set, the resource set including a combination of the following: A sounding reference signal (SRS) resource set, and A demodulation reference signal (DMRS) resource set, Among them, the beam management configuration includes a repetition indication, the repetition indication indicating that multiple SRSs will be sent on a single beam; and Use the resource set indicated by the beam management configuration to receive at least one SRS and at least one DMRS during an uplink beam management occasion, wherein at least partially based on the repetition indication, the at least one DMRS is transmitted via the single beam.

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