Doppler shift compensation

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment may receive quasi-co-location (QCL) information associated with an uplink transmission control indicator (TCI) state based at least in part on transmitting information indicating the UE's capability in terms of uplink frequency shift configuration; determine an uplink frequency shift configuration for a sounding reference signal (SRS) based at least in part on the QCL information associated with the uplink TCI state; and transmit the SRS based at least in part on the uplink frequency shift configuration. Numerous other aspects are provided.

Description

[0001] public domain

[0002] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatuses for Doppler shift compensation.

[0003] background

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple access technologies capable of supporting 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 several base stations (BSs) capable of supporting communications for several user equipment (UEs). User equipment (UEs) may communicate with the base stations (BSs) via downlinks and uplinks. The downlink (or forward link) refers to the communication link from the BS to the UE, while 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, and so on.

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

[0007] Overview

[0008] In some aspects, a wireless communication method performed by a user equipment may include receiving quasi-co-location (QCL) information associated with an uplink transmission control indicator (TCI) state based at least in part on transmitting information indicating the UE's capability in uplink frequency shift configuration; determining an uplink frequency shift configuration for a sounding reference signal (SRS) based at least in part on the QCL information associated with the uplink TCI state; and transmitting the SRS based at least in part on the uplink frequency shift configuration.

[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 QCL information associated with an uplink TCI state based at least in part on transmitting information indicating the UE's capability in uplink frequency shift configuration; determine an uplink frequency shift configuration for an SRS based at least in part on the QCL information associated with the uplink TCI state; and transmit the SRS based at least in part on the uplink frequency shift configuration.

[0010] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: receive QCL information associated with an uplink TCI state based at least in part on transmitting information indicating the UE's capability in uplink frequency shift configuration; determine an uplink frequency shift configuration for an SRS based at least in part on the QCL information associated with the uplink TCI state; and transmit the SRS based at least in part on the uplink frequency shift configuration.

[0011] In some aspects, an apparatus for wireless communication may include: a device for receiving QCL information associated with an uplink TCI state based at least in part on transmitting information indicating capability in uplink frequency shift configuration; a device for determining an uplink frequency shift configuration for an SRS based at least in part on the QCL information associated with the uplink TCI state; and a device for transmitting the SRS based at least in part on the uplink frequency shift configuration.

[0012] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems substantially as described herein with reference to and as illustrated in the accompanying figures and description.

[0013] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The concepts and specific examples disclosed can be readily used as a basis for modifying or designing other structures for implementing the same purposes as 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, as well as the associated advantages, will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the figures is provided for illustration and description purposes and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to understand in detail the features of the present disclosure set forth above, a more particular description of the content briefly summarized above may be obtained with reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only certain typical aspects of the present disclosure and are not to be considered limiting of its scope, as the description may admit to other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0016] Figure 1 is a diagram illustrating an example of a wireless network in accordance with various aspects of the present disclosure.

[0017] Figure 2 is a diagram illustrating an example of a base station and a UE in communication in a wireless network according to various aspects of the present disclosure.

[0018] Figure 3A and 3B is a diagram illustrating an example of communication in a Doppler shift scenario according to various aspects of the present disclosure.

[0019] Figure 4 is a diagram illustrating an example associated with Doppler shift compensation according to various aspects of the present disclosure.

[0020] Figure 5A and 5B is a diagram illustrating an example associated with Doppler shift compensation according to various aspects of the present disclosure.

[0021] Figures 6A-6E is a diagram illustrating an example associated with a quasi-co-location relationship for Doppler shift compensation according to various aspects of the present disclosure.

[0022] Figure 7 is a diagram illustrating an example process associated with Doppler shift compensation according to various aspects of the present disclosure.

[0023] Detailed description

[0024] In some communication systems (such as multiple transmission reception point (TRP) deployments), user equipment (UE) can operate in a mobility state. For example, in a high-speed train (HST) single frequency network (SFN) deployment, a UE or other wireless device can connect to the network via one or more TRPs when the mobile speed is greater than a threshold. As a result, communication with the UE or other wireless device may be affected by Doppler shift. The UE can use a quasi-co-location (QCL) relationship to facilitate channel estimation, frequency offset estimation, synchronization, etc. For example, when the UE determines that a first antenna port has a QCL relationship with a second antenna port, the UE can apply the parameters determined for the first antenna port to the second antenna interface. This can reduce signaling overhead, improve utilization of network resources, etc. The QCL relationship can be specified at least in part based on a transmission control indicator (TCI) state.

[0025] However, when operating in, for example, an HST-SFN deployment, a UE may be subject to different conditions for different beams of different remote radio heads (RRHs) with different TRPs. In other words, the UE may experience a first Doppler shift for communicating with a first RRH at a first location, and a second Doppler shift for communicating with a second RRH at a second location. When the UE estimates the carrier frequency, the UE may use that carrier frequency to transmit to the first and second RRHs. However, the first and second RRHs may not be able to estimate the Doppler shift pre-compensation value used by the UE. This may result in dropped communications, interference, etc.

[0026] Some aspects described herein provide enhancements to Doppler shift compensation. For example, the UE transmits an indication of the UE's capabilities in uplink frequency shift configuration, receives QCL information associated with a TCI state, determines an uplink frequency shift configuration for a sounding reference signal (SRS) based at least in part on the QCL information and the TCI state, and can transmit the SRS according to the uplink frequency shift configuration. In this case, the UE is able to estimate a Doppler shift pre-compensation value for each TRP used to communicate with the UE based at least in part on determining the uplink frequency shift configuration using the QCL information and the TCI state. In this way, the UE reduces the likelihood of dropped communications, interference, and the like.

[0027] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided to make the present disclosure thorough and complete, and they will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings of this article, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is implemented independently of any other aspect of the present disclosure or implemented in combination. For example, any number of aspects set forth herein can 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 that are practiced using a supplement to the various aspects of the present disclosure set forth herein or other other structures, functionality, or structure and functionality. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0028] Several aspects of telecommunications systems will now be presented with reference to various devices and techniques. These devices and techniques are 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 such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0029] It should be noted that although various aspects may be described herein using terminology associated with 5G or NR radio access technology (RAT), various aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or RATs beyond 5G (e.g., 6G).

[0030] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to various aspects of the present disclosure. The wireless network 100 may be a 5G (NR) network, an LTE network, or the like, or may include elements thereof. The wireless network 100 may include several 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, a Node B, a gNB, a 5G Node B (NB), an access point, a transmit reception point (TRP), or the like. 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 a BS subsystem serving that coverage area, depending on the context in which the term is used.

[0031] A BS 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., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in FIG, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB," "base station," "NR BS," "gNB," "TRP," "AP," "Node B," "5G NB," and "cell" may be used interchangeably herein.

[0032] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may interconnect with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.) using any suitable transport network.

[0033] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , relay station 110d may communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay station may also be referred to as a relay BS, relay base station, relay, or the like.

[0034] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0035] The network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. These BSs may also communicate with each other directly or indirectly, for example, via a wireless or wired backhaul.

[0036] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. A UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. A UE may be a cellular phone (e.g., a smartphone), 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, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0037] Some UEs may be considered machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and the like, which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices and / or may be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs may be considered customer premises equipment (CPE). UE 120 may be included within a housing that houses components of UE 120, such as a processor component, a memory component, and the like. In some aspects, the processor component and the memory component may be coupled together. For example, the processor component (e.g., one or more processors) and the memory component (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, and the like.

[0038] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. A frequency may also 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.

[0039] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary) using one or more sidelink channels. For example, the UEs 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, etc.), mesh networks, etc. In this scenario, the UEs 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the base station 110.

[0040] Devices of the wireless network 100 may communicate using an electromagnetic spectrum that may be subdivided into various categories, bands, channels, etc. based on frequency or wavelength. For example, devices of the wireless network 100 may communicate using an operating band having a first frequency range (FR1) that may span 410 MHz to 7.125 GHz and / or may communicate using an operating band having a second frequency range (FR2), the first frequency range (FR1) may span 410 MHz to 7.125 GHz, and the second frequency range (FR2) may span 24.25 GHz to 52.6 GHz. Frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a "sub-6 GHz band." Similarly, although different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU), FR2 is often referred to as a "millimeter wave" band. Thus, unless otherwise specifically stated, it should be understood that, if used herein, the term sub-6 GHz, etc., may broadly refer to 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, the term "millimeter wave," etc., may broadly refer to frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and that the techniques described herein are applicable to those modified frequency ranges.

[0041] As indicated above, Figure 1 are provided as examples. Other examples may differ from those described in Figure 1 Examples described.

[0042] Figure 2 is a diagram illustrating an example 200 of a base station 110 and a UE 120 in communication in a wireless network 100 in accordance with various aspects of the present disclosure. The base station 110 may be equipped with T antennas 234a through 234t, and the UE 120 may be equipped with R antennas 252a through 252r, where in general T≥1 and R≥1.

[0043] At base station 110, transmit processor 220 may receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. 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, upper layer signaling, etc.), and provide overhead symbols and control symbols. Transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signal (CRS)), demodulation reference signal (DMRS), etc.) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). A 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, as applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and frequency upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

[0044] At UE 120, antennas 252a through 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 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. A MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a 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), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0045] 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.

[0046] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, where applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, a modulator and / or demodulator 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 aspects of any of the methods described herein, for example, as described with reference to Figure 3A-7 described.

[0047] At base station 110, uplink signals from UE 120 and other UEs may be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236, if applicable, and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 120. Receive processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 may include a communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include a scheduler 246 to schedule UE 120 for downlink and / or uplink communications. In some aspects, base station 110 includes a transceiver. The transceiver may include any combination of antenna(s) 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 (eg, controller / processor 240) and memory 242 to perform aspects of any of the methods described herein, for example, as described with reference to Figure 3A-7 described.

[0048] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) of may perform one or more techniques associated with Doppler pre-compensation indication, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the may perform or direct e.g. Figure 7 700 and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include: a non-transitory computer-readable medium storing one or more instructions (e.g., code, program code, etc.) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compilation, conversion, interpretation, etc.) by one or more processors of base station 110 and / or UE 120, may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example Figure 7 In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, interpreting instructions, etc.

[0049] In some aspects, UE 120 may include: means for receiving quasi co-location (QCL) information associated with an uplink transmission control indicator (TCI) state based at least in part on transmitting information indicating the UE's capability in uplink frequency shift configuration; means for determining an uplink frequency shift configuration for a sounding reference signal (SRS) based at least in part on the QCL information associated with the uplink TCI state; means for transmitting the SRS based at least in part on the uplink frequency shift configuration, etc. In some aspects, such means may include in conjunction with Figure 2 One or more components of the UE 120 are depicted, such as the controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and so forth.

[0050] although Figure 2 The blocks in FIG. 2 are illustrated as distinct components, but the functionality described above with respect to these blocks may be implemented using a single hardware, software, or combined component or a combination of various components. For example, the functionality described with respect to 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.

[0051] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described in Figure 2 Examples described.

[0052] The UE can use the quasi-co-location (QCL) relationship between different reference signal ports to implement channel estimation, frequency offset estimation, synchronization, etc. For example, when a pair of antenna ports are quasi-co-located with respect to the delay spread, the UE can use the delay spread determined for the first antenna port when using the second antenna port. Based at least in part on the use of the QCL relationship, the UE can receive the physical downlink shared channel (PDSCH), the physical downlink control channel (PDCCH), the channel state information reference signal (CSI-RS), etc. For example, the BS can indicate that the antenna port used for synchronization signal block (SSB) communication or CSI-RS communication is quasi-co-located with the antenna port used for PDCCH, PDSCH, CSI-RS, etc. The QCL relationship can be defined according to a type set. In QCL type A, the antenna ports can share Doppler shift, Doppler spread, average delay and delay spread. In QCL type B, the antenna ports can share Doppler shift and Doppler spread. In QCL type C, the antenna ports can share Doppler shift and average delay. In QCL Type D, antenna ports can share spatial receiver parameters.

[0053] Similarly, the BS may use radio resource control (RRC) configuration to identify a transmission control indicator (TCI) state set for PDSCH, a TCI state set for PDCCH, and the like. In this case, after identifying the TCI state set for the channel, the BS may use, for example, a media access control (MAC) control element (CE) or downlink control information transmission to indicate which TCI state is active. Each TCI state defines a parameter set for configuring a QCL relationship between a downlink reference signal set and one or more ports (such as a set of demodulation reference signal (DMRS) ports for PDSCH, a DMRS port for PDCCH, a CSI-RS port for a CSI-RS resource, and the like). The downlink reference signal set for which a TCI state defines a QCL relationship may include an SSB or a CSI-RS. In some cases, a TCI state may be configured with a pair of QCL relationships, such as a TCI state indicating a first QCL relationship for a first downlink reference signal and a second QCL relationship for a second downlink reference signal.

[0054] The QCL relationship can be extended to uplink communications using uplink TCI states. For example, the uplink TCI state may include a source reference signal indicating an uplink transmission beam for a target uplink reference signal and / or channel. In this case, the source reference signal may include a sounding reference signal (SRS), SSB, CSI-RS, etc., and the target uplink reference signal or channel may include a physical uplink control channel (PUCCH), SRS, physical random access channel (PRACH), physical uplink shared channel (PUSCH), etc. The uplink TCI state can be classified according to type (e.g., type 1, type 2, etc.), which can be defined by the source reference signal, the target uplink reference signal, and the associated QCL relationship.

[0055] Figure 3A and 3B is a diagram illustrating an example 300 / 300' associated with communications in a Doppler shift scenario according to various aspects of the present disclosure. Figure 3A and 3B As shown in FIG. 3 , example 300 / 300 ′ includes a UE 120 and a set of BSs 110 , such as in a HST-SFN deployment (eg, the UE 120 may be a communication component of a train or a UE operating on a train).

[0056] As in Figure 3A and 3BAs shown in FIG, a group of BSs 110 may be a group of transmit receive points (TRPs) associated with multiple remote radio heads (RRHs). In this case, these TRPs may coordinate the transmission of one or more tracking reference signals (TRSs), PDSCHs, and the like. In this case, as shown, the Doppler shift experienced by UE 120 from RRH1 may be +1.1 kilohertz (kHz), and the Doppler shift experienced by UE 120 from RRH2 may be -1.1 kHz. UE 120 may modulate the carrier frequency of an uplink signal based at least in part on the carrier frequency of the received downlink signal. For example, UE 120 may modulate the uplink signal based at least in part on the carrier frequency of a TRS or PDSCH. However, the carrier frequency measured by UE 120 for a TRS or PDSCH may be associated with two different Doppler shifts, as shown. This may prevent UE 120 and BS 110 from communicating to enable Doppler shift pre-compensation for each TRP and associated RRH. Some aspects described herein may enable a UE to modulate, for example, a carrier frequency of an uplink signal based at least in part on the carrier frequency of a TRS from only signal TRP, which may enable BS 110 to determine a Doppler shift precompensation value for each TRP and associated RRH.

[0057] As indicated above, Figure 3A and Figure 3B are provided as examples. Other examples may differ from those described in Figure 3A and Figure 3B Examples described.

[0058] Figure 4 is a diagram illustrating an example 400 associated with Doppler shift compensation according to various aspects of the present disclosure. Figure 4 As shown, example 400 includes a UE 120 and a set of BSs 110 . Figure 5A and 5B is a diagram illustrating an example 500 / 500' associated with Doppler shift compensation according to various aspects of the present disclosure. Figure 5A and 5B As shown in FIG. 5 , example 500 / 500 ′ includes a UE 120 and a set of BSs 110 .

[0059] As in Figure 41 and further illustrated by reference numerals 410 and 420, a UE 120 may receive corresponding TRSs and single frequency network (SFN) PDSCHs from a set of BSs 110. For example, the UE 120 may receive a first TRS (TRS1) and a first PDSCH from a first BS 110 and a second TRS (TRS2) and a second PDSCH from a second BS 110. In some aspects, the UE 120 may receive a dynamic indication that the PDSCH is not affected by Doppler pre-compensation. In this case, as illustrated by reference numeral 430, the UE 120 may compensate for uplink clock oscillator (XO) errors based at least in part on a frequency offset from the TRS and / or PDSCH.

[0060] In some aspects, the UE 120 may determine the XO error according to a set of equations:

[0061]

[0062] ∈ UE =∈ CFO +∈ DopplerShift +∈ noise

[0063]

[0064]

[0065] where f represents the UE's uncorrected (XO-based) frequency, represents the frequency corrected by the UE using the frequency tracking loop (FTL), F represents the nominal frequency of the allocated channel frequency (e.g., E-UTRA Absolute Radio Frequency Channel Number (EARFCN)), ∈ represents the XO ppm error relative to the nominal frequency, ∈ UE represents an error determined at least in part based on a downlink FTL loop at least in part based on TRS and / or SSB, ∈ DopplerShift represents the Doppler frequency shift component of the error, and ∈ Noise represents the noise component of the error. In this case, BS 110 may estimate the frequency offset from the transmitted SRS based at least in part on the following equation, as described below:

[0066]

[0067] This may enable BS 110 to successfully decode the transmitted SRS and / or associated communications.

[0068] As in Figure 4, and further shown by reference numeral 440, UE 120 may transmit an SRS on the uplink to the group of BSs 110. For example, UE 120 may transmit the SRS, and the group of BSs 110 may estimate the Doppler shift offset based at least in part on the SRS. In some aspects, UE 120 may time division multiplex (TDM) the SRS. For example, UE 120 may transmit the SRS using two different SRS resources, using one SRS resource with multiple symbols, using multiple antenna panels, etc. In some aspects, UE 120 may configure an uplink TCI state set for the SRS resource set. For example, UE 120 may configure a first uplink TCI state associated with TRS1 for a first SRS, and a second uplink TCI state associated with TRS2 for a second SRS. Subsequently, as shown by reference numeral 450, UE 120 may receive a further PDSCH transmission to which Doppler precompensation is applied. In this case, the QCL relationship between the set of TRSs and the further PDSCH transmission can change based at least in part on the application of Doppler precompensation. However, in some cases, the Doppler shift may change between when UE 120 estimates the Doppler shift based at least in part on the TRSs and when UE 120 receives the further precompensated PDSCH transmission. Furthermore, Doppler shift estimation errors may exist at UE 120 and / or the set of BSs 110.

[0069] As in Figure 5A In and as shown by example 500, when the group of BSs 110 can communicate with each other in the backhaul network or when each RRH is an RRH of a single TRP, the UE 120 can map the SRS to a single TRS that is the source RS of the QCL relationship. Figure 5B In the example 500', when the group of BSs 110 do not communicate via a backhaul and / or the RRHs are associated with different TRPs, the UE 120 can map the SRS to each TRS. In this case, each TRP can separately estimate the Doppler shift from the uplink SRS and perform precompensation on the downlink.

[0070] As indicated above, Figure 4 are provided as examples. Other examples may differ from those described in Figure 4 The example described above. As indicated above, Figure 5A and Figure 5B are provided as examples. Other examples may differ from those described in Figure 5A and Figure 5B Examples described.

[0071] Figures 6A-6E6 is a diagram illustrating examples 600-680 associated with communications in a Doppler shift scenario according to various aspects of the present disclosure. Figure 6A As shown, example 600 includes a UE 120 and a set of BSs 110 .

[0072] like Figure 6A , and as further illustrated by reference numeral 605, the UE 120 may provide UE capability information. For example, the UE 120 may indicate that the UE 120 is capable of Doppler shift modulation. In some aspects, the UE 120 may indicate capabilities in terms of single Doppler shift, multiple Doppler shift, etc., as described in more detail herein. In this case, the BS 110 may provide configuration information identifying the TCI state, QCL type, etc. based at least in part on receiving the UE capability information, as shown by reference numeral 610. For example, the UE 120 may receive SRS resource set information associated with configuring the SRS resource set for SRS transmission. In this case, the UE 120 may receive the configuration information and may determine that uplink Doppler shift compensation is enabled based at least in part on receiving the configuration information.

[0073] In some aspects, the UE 120 may receive spatial relationship information indicating a QCL source reference signal and a corresponding QCL relationship. In some aspects, the UE 120 may receive a radio resource control (RRC) message including QCL information associated with determining an uplink TCI state. For example, when the UE 120 is using aperiodic SRS (A-SRS), the UE 120 may receive downlink control information (DCI) including information identifying an uplink TCI code point, the uplink TCI code point indicating a TCI state index corresponding to a TCI state in a configured TCI state set. Additionally or alternatively, when the UE 120 is using semi-persistent SRS (SP-SRS), the UE 120 may receive a media access control (MAC) control element (CE) identifying an uplink TCI code point, the uplink TCI code point indicating a TCI state index according to which an uplink TCI state is selected for communication.

[0074] In some aspects, the UE 120 may determine a mapping between a single or multiple Doppler shifts for the SRS based at least in part on the identified uplink TCI state, the QCL assumption, etc. In this case, based at least in part on the QCL source reference signal, the indicated uplink TCI state, etc., the UE 120 may adjust or modulate the uplink signal and transmit one or more SRSs, such as Figure 6A6 and further illustrated by reference numerals 615 and 620. For example, UE 120 may determine an uplink frequency shift configuration for the SRS (e.g., which may include a frequency shift to the uplink carrier center frequency) based at least in part on the estimated Doppler shift. In this case, UE 120 may estimate the Doppler shift based at least in part on the downlink TRS as a QCL source reference signal, the QCL relationship, the indicated uplink TCI state, etc.

[0075] As an example, for QCL Type A, QCL Type B, and QCL Type C, UE 120 may forgo Doppler shift modulation of an uplink signal (e.g., SRS) based at least in part on the fact that the TRS and SRS are quasi-colocated. Conversely, for QCL Type E, UE 120 may perform Doppler modulation based at least in part on the fact that the Doppler shift or spread of the TRS and SRS is different. Figure 6B In and as shown by example 650, for QCL source reference signal TRS1 and QCL type A, QCL type B, or QCL type C, with respect to SRS, UE 120 may forgo performing Doppler shifting on a single SRS. Figure 6C In and as shown by example 660, for QCL source reference signal TRS1 and QCL type E, UE 120 may perform a single Doppler shift on a single SRS. Figure 6D In and as shown by example 670, when UE 120 receives multiple TRSs as QCL source reference signals for a single SRS, UE 120 may perform multiple Doppler shifts on the single SRS. Figure 6E In and as illustrated by example 680, when UE 120 receives multiple TRSs as QCL source reference signals corresponding to multiple SRSs, UE 120 may perform a corresponding Doppler shift on each SRS.

[0076] In some aspects, the UE 120 may determine multiple QCL hypotheses corresponding to multiple TCI states for the TRS of the TRP. For example, when the UE 120 is configured with a single SRS resource set, based at least in part on receiving SRS resource set information having multiple SRS resources (as described above with respect to reference numeral 610), the UE 120 may identify multiple uplink TCI states for the multiple SRS resources. Additionally or alternatively, when the UE 120 has multiple panels, the UE 120 may have a different SRS resource set for each panel and may have a TCI state corresponding to each SRS resource set or a set of TCI states corresponding to each SRS resource set. In some aspects, the UE 120 may have a single SRS resource comprising multiple symbols. For example, the UE 120 may have received SRS resource information identifying a time division multiplexing (TDM) of an SRS resource having a first symbol and a second symbol. In this case, the first symbol and the second symbol may share a common QCL type. Additionally or alternatively, UE 120 may have a different QCL type for each symbol.

[0077] As indicated above, Figures 6A-6E are provided as examples. Other examples may differ from those described in Figures 6A-6E Examples described.

[0078] Figure 7 is a diagram illustrating an example process 700, performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 700 is an example in which a UE (eg, UE 120, etc.) performs operations associated with Doppler shift compensation.

[0079] like Figure 7 As shown in , in some aspects, process 700 may include receiving quasi co-location (QCL) information associated with an uplink transmission control indicator (TCI) state based at least in part on transmitting information indicating the UE's capability with respect to uplink frequency shift configuration (block 710). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may receive quasi co-location (QCL) information associated with an uplink transmission control indicator (TCI) state based at least in part on transmitting information indicating the UE's capability with respect to uplink frequency shift configuration, as described above.

[0080] like Figure 7As further shown in FIG, in some aspects, process 700 may include determining an uplink frequency shift configuration for a sounding reference signal (SRS) based at least in part on the QCL information associated with the uplink TCI state (block 720). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may determine the uplink frequency shift configuration for a sounding reference signal (SRS) based at least in part on the QCL information associated with the uplink TCI state, as described above.

[0081] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include transmitting the SRS based at least in part on the uplink frequency shift configuration (block 730). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may transmit the SRS based at least in part on the uplink frequency shift configuration, as described above.

[0082] Process 700 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.

[0083] In a first aspect, the uplink frequency shift configuration is based at least in part on a Doppler shift determined at least in part based on a downlink tracking reference signal as a source reference signal for the QCL information or the uplink TCI state.

[0084] In a second aspect, alone or in combination with the first aspect, process 700 includes transmitting the information indicating the capability of the UE in uplink frequency shift configuration in conjunction with downlink Doppler shift.

[0085] In a third aspect, alone or in combination with one or more of the first and second aspects, process 700 includes receiving a downlink shared channel message pre-compensated for downlink Doppler shift in conjunction with the SRS.

[0086] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the UE is configured to map the SRS to a single received tracking reference signal in the uplink frequency shift configuration.

[0087] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the UE is configured to map the SRS to a plurality of received tracking reference signals according to the uplink frequency shift configuration.

[0088] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the QCL information indicates at least one of QCL Type A, Type B, or Type C; and the uplink frequency shift configuration does not include Doppler shift modulation.

[0089] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the QCL information indicates QCL type E; and the uplink frequency shift configuration includes Doppler shift modulation.

[0090] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the SRS is an aperiodic SRS and the uplink TCI state is based at least in part on an uplink TCI code point indicated in downlink control information.

[0091] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the SRS is a semi-persistent SRS and the uplink TCI state is based at least in part on an uplink TCI codepoint indicated in a media access control control element.

[0092] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the SRS is a periodic SRS and the uplink TCI state is based at least in part on a radio resource control (RRC) configuration.

[0093] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the QCL information is based at least in part on a received channel state information reference signal.

[0094] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the QCL information is configured on at least one of the following basis: per transmit-receive point, per antenna panel, per symbol, or per symbol group.

[0095] although Figure 7 Example blocks of process 700 are shown, but in some aspects, process 700 may include Figure 7 7. In some embodiments, the process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in FIG. Additionally or alternatively, two or more blocks of process 700 may be executed in parallel.

[0096] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.

[0097] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware, firmware, and / or hardware and software. As used herein, a processor is implemented with hardware, firmware, and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented in different forms of hardware, firmware, 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. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software code—it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0098] 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.

[0099] Although specific feature combinations are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in this group of claims. The phrase quoting "at least one of" a column of items refers to any combination of these items, including single members. As an example, "at least one of a, b or c" is intended to encompass: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other arrangement of a, b and c).

[0100] The elements, actions or instructions used herein should not be interpreted as key or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more projects and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more projects cited in conjunction with the article "the", 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 projects (for example, related items, non-related items, a combination of related and non-related items, etc.), and can be used interchangeably with "one or more". In the case of being intended to have only one project, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "comprising" etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "at least partially based on", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used in a sequence is intended to be inclusive and used interchangeably with "and / or" unless expressly stated otherwise (e.g., when used in conjunction with "either of" or "only one of").

Claims

1. A wireless communication method performed by a user equipment (UE), comprising: transmitting, to a network entity, UE capability information associated with a capability of the UE to perform Doppler shift compensation; receiving, from the network entity, configuration information including quasi co-location (QCL) information associated with an uplink transmission control indicator (TCI) state based on receiving the UE capability information; determining, based on the received configuration information, that uplink Doppler shift compensation is enabled; Based on determining that Doppler shift compensation is enabled, further determining an uplink frequency offset configuration for a sounding reference signal (SRS) based at least in part on the uplink TCI state identified using the QCL information, wherein the further determining comprises estimating Doppler shift based at least in part on the identified uplink TCI state; and The SRS is transmitted to the network entity based at least in part on the uplink frequency offset configuration, wherein the SRS is transmitted using an uplink signal modulated based on the estimated Doppler shift. 2 . The method of claim 1 , wherein the Doppler shift is estimated based on a downlink reference signal that is a source reference signal of the QCL information.

3. The method of claim 1, further comprising: A downlink shared channel message with downlink Doppler shift pre-compensation associated with the SRS is received.

4. The method of claim 1, wherein the UE is configured to map the SRS to a single received tracking reference signal according to the uplink frequency offset configuration. 5 . The method of claim 1 , wherein the UE is configured to map the SRS to a plurality of received tracking reference signals according to the uplink frequency offset configuration.

6. The method of claim 1 , wherein the QCL information indicates at least one of QCL Type A, Type B, or Type C; and The uplink frequency offset configuration does not include Doppler shift modulation. The method of claim 1 , wherein the QCL information indicates a QCL associated with a Doppler shift or spread.

8. The method of claim 1 , wherein the SRS is an aperiodic SRS and the uplink TCI state is based at least in part on an uplink TCI code point indicated in downlink control information.

9. The method of claim 1 , wherein the SRS is a semi-persistent SRS and the uplink TCI state is based at least in part on an uplink TCI codepoint indicated in a media access control control element.

10. The method of claim 1, wherein the SRS is a periodic SRS and the uplink TCI state is based at least in part on a radio resource control (RRC) configuration.

11. The method of claim 1 , wherein the QCL information is based at least in part on a received channel state information reference signal.

12. The method of claim 1, wherein the QCL information is configured on a per-transmission-reception-point basis.

13. The method of claim 1, wherein the QCL information is configured on a per antenna panel basis.

14. The method of claim 1, wherein the QCL information is configured on a per-symbol basis.

15. The method of claim 1, wherein the QCL information is configured on a per symbol group basis.

16. A user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory; as well as instructions stored in the memory and operable, when executed by the one or more processors, to cause the UE to: transmitting, to a network entity, UE capability information associated with a capability of the UE to perform Doppler shift compensation; receiving, from the network entity, configuration information including quasi co-location (QCL) information associated with an uplink transmission control indicator (TCI) state based on receiving the UE capability information; determining, based on the received configuration information, that uplink Doppler shift compensation is enabled; Based on determining that Doppler shift compensation is enabled, further determining an uplink frequency offset configuration for a sounding reference signal (SRS) based at least in part on the uplink TCI state identified using the QCL information, wherein the further determining comprises estimating Doppler shift based at least in part on the identified uplink TCI state; and The SRS is transmitted to the network entity based at least in part on the uplink frequency offset configuration, wherein the one or more processors are further configured to cause the UE to transmit the SRS using an uplink signal modulated based on the estimated Doppler shift. 17 . The UE of claim 16 , wherein the Doppler shift is estimated further based on a downlink reference signal that is a source reference signal of the QCL information.

18. The UE of claim 16, wherein the one or more processors are further configured to cause the UE to: A downlink shared channel message with downlink Doppler shift pre-compensation associated with the SRS is received.

19. The UE of claim 16, wherein the UE is configured to map the SRS to a single received tracking reference signal according to the uplink frequency offset configuration.

20. The UE of claim 16, wherein the UE is configured to map the SRS to a plurality of received tracking reference signals according to the uplink frequency offset configuration.

21. The UE of claim 16, wherein the QCL information indicates at least one of QCL Type A, Type B, or Type C; and The uplink frequency offset configuration does not include Doppler shift modulation.

22. The UE of claim 16, wherein the QCL information indicates a QCL associated with a Doppler shift or spread.

23. The UE of claim 16, wherein the SRS is an aperiodic SRS and the uplink TCI state is based at least in part on an uplink TCI code point indicated in downlink control information.

24. The UE of claim 16, wherein the SRS is a semi-persistent SRS and the uplink TCI state is based at least in part on an uplink TCI codepoint indicated in a media access control control element.

25. The UE of claim 16, wherein the SRS is a periodic SRS and the uplink TCI state is based at least in part on a radio resource control (RRC) configuration.

26. The UE of claim 16, wherein the QCL information is based at least in part on a received channel state information reference signal.

27. The UE of claim 16, wherein the QCL information is configured on at least one of the following basis: per transmission reception point, per antenna panel, per symbol, or per symbol group.

28. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to: transmitting, to a network entity, UE capability information associated with a capability of the UE to perform Doppler shift compensation; receiving, from the network entity, configuration information including quasi co-location (QCL) information associated with an uplink transmission control indicator (TCI) state based on receiving the UE capability information; determining, based on the received configuration information, that uplink Doppler shift compensation is enabled; Based on determining that Doppler shift compensation is enabled, further determining an uplink frequency offset configuration for a sounding reference signal (SRS) based at least in part on the uplink TCI state identified using the QCL information, wherein the further determining comprises estimating Doppler shift based at least in part on the identified uplink TCI state; and The SRS is transmitted to the network entity based at least in part on the uplink frequency offset configuration, wherein the one or more instructions, when executed by the one or more processors, cause the one or more processors to transmit the SRS using an uplink signal modulated based on the estimated Doppler shift.

29. The non-transitory computer-readable medium of claim 28, wherein the Doppler shift is estimated further based on a downlink tracking reference signal that is a source reference signal for the QCL information.

30. The non-transitory computer-readable medium of claim 28, wherein the QCL information is configured on at least one of the following basis: per transmit-receive point, per antenna panel, per symbol, or per symbol group.

31. A device for wireless communication, comprising: means for transmitting, to a network entity, UE capability information associated with the UE's capability for performing Doppler shift compensation; means for receiving, from the network entity, configuration information including quasi co-location (QCL) information associated with an uplink transmission control indicator (TCI) state based on receiving the UE capability information; means for determining, based on the received configuration information, that uplink Doppler shift compensation is enabled; means for further determining, based on determining that Doppler shift compensation is enabled, an uplink frequency offset configuration for a sounding reference signal (SRS) based at least in part on the uplink TCI state identified using the QCL information, wherein the further determining comprises estimating Doppler shift based at least in part on the identified uplink TCI state; as well as means for transmitting the SRS to the network entity based at least in part on the uplink frequency offset configuration, wherein the apparatus further comprises means for transmitting the SRS using an uplink signal modulated based on the estimated Doppler shift.

32. The apparatus of claim 31, wherein the Doppler shift is estimated further based on a downlink reference signal that is a source reference signal of the QCL information.

33. The apparatus of claim 31 , wherein the apparatus is configured to map the SRS to a single received tracking reference signal in the uplink frequency offset configuration.

34. The apparatus of claim 31, wherein the apparatus is configured to map the SRS to a plurality of received tracking reference signals according to the uplink frequency offset configuration.

35. The apparatus of claim 31 , wherein the QCL information indicates at least one of QCL Type A, Type B, or Type C; and The uplink frequency offset configuration does not include Doppler shift modulation.

36. The apparatus of claim 31, wherein the QCL information indicates a QCL associated with a Doppler shift or spread.

37. The apparatus of claim 31 , wherein the SRS is an aperiodic SRS and the uplink TCI state is based at least in part on an uplink TCI code point indicated in downlink control information.

38. The apparatus of claim 31 , wherein the SRS is a semi-persistent SRS and the uplink TCI state is based at least in part on an uplink TCI codepoint indicated in a media access control control element.

39. The apparatus of claim 31 , wherein the SRS is a periodic SRS and the uplink TCI state is based at least in part on a radio resource control (RRC) configuration.

40. The apparatus of claim 31, wherein the QCL information is based at least in part on a received channel state information reference signal.

41. The apparatus of claim 31, wherein the QCL information is configured on a per-transmission-reception-point basis.

42. The apparatus of claim 31 , wherein the QCL information is configured on a per antenna panel basis.

43. The apparatus of claim 31, wherein the QCL information is configured on a per-symbol basis.

44. The apparatus of claim 31, wherein the QCL information is configured on a per symbol group basis.

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