Techniques for managing sounding reference signal resource handover

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive a first sounding reference signal (SRS) configuration, where the first SRS configuration indicates a number of antenna ports on which an SRS is to be transmitted. The UE may determine that a number of antenna ports indicated by the first SRS configuration exceeds an antenna capability of the UE. The UE may transmit the one or more SRSs using a second SRS configuration based at least in part on determining that the first SRS configuration exceeds the antenna capability of the UE. Numerous other aspects are described.

Description

[0001] This application is a divisional application of the invention application filed by Qualcomm Incorporated on December 28, 2021, with application number 202180088579.X and entitled "Technology for Managing Switching of Detection Reference Signal Resources".

[0002] Cross-references to related applications

[0003] This patent application claims priority to U.S. Provisional Patent Application No. 63 / 199,534, filed January 6, 2021, entitled “TECHNIQUES FOR MANAGING SOUNDING REFERENCE SIGNAL RESOURCE SWITCHING,” and U.S. Non-Provisional Patent Application No. 17 / 646,042, filed December 27, 2021, entitled “TECHNIQUES FOR MANAGING SOUNDING REFERENCE SIGNAL RESOURCE SWITCHING,” which are expressly incorporated herein by reference. Technical Field

[0004] Various aspects of this disclosure relate generally to wireless communications, and specifically to techniques and apparatus for managing the switching of probe reference signal (SRS) resources. Background Technology

[0005] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a collection of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0006] A wireless network may include several base stations (BSs) capable of supporting communication for multiple user equipments (UEs). UEs can communicate with the BS via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the BS to the UE, while an 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.

[0007] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different user equipment to communicate at the municipal, national, regional, and even global levels. NR (also known as 5G) is a collection of enhancements to the LTE mobile standard released by 3GPP. NR aims to support mobile broadband internet access by: improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and better integrating with other open standards by using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) on the downlink (DL) and CP-OFDM and / or Single Carrier Frequency Division Multiplexing (SC-FDM) (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation. Further improvements to LTE, NR, and other radio access technologies remain useful as the demand for mobile broadband access continues to increase. Summary of the Invention

[0008] In some aspects, a method of wireless communication performed by a user equipment (UE) includes: receiving a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates the number of antenna ports on which SRS are to be transmitted; determining that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE; and transmitting one or more SRSs using a second SRS configuration, based at least in part on the determination that the first SRS configuration exceeds the antenna capacity of the UE.

[0009] In some aspects, a UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates the number of antenna ports on which SRS are to be transmitted; determine that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE; and, based at least in part on the determination that the first SRS configuration exceeds the antenna capacity of the UE, use a second SRS configuration to transmit one or more SRSs.

[0010] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates the number of antenna ports on which SRS are to be transmitted; determine that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE; and, based at least in part on the determination that the first SRS configuration exceeds the antenna capacity of the UE, use a second SRS configuration to transmit one or more SRSs.

[0011] In some aspects, an apparatus for wireless communication includes components for receiving a first SRS configuration, wherein the first SRS configuration indicates the number of antenna ports on which SRS are to be transmitted; components for determining that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the apparatus; and a unit for transmitting one or more SRSs using a second SRS configuration, at least in part based on the determination that the first SRS configuration exceeds the antenna capacity of the apparatus.

[0012] In some aspects, a method of wireless communication performed by a user equipment (UE) includes: receiving a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates a number of antenna ports on which SRS are to be transmitted; determining that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE; and transmitting one or more SRSs using a second SRS configuration, at least in part based on the determination that the first SRS configuration exceeds the antenna capacity of the UE, wherein the second SRS configuration includes blanking one or more SRS transmissions.

[0013] In some aspects, a user equipment (UE) for wireless communication includes: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates the number of antenna ports on which SRS are to be transmitted; determine that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capability of the UE; and, based at least in part on the determination that the first SRS configuration exceeds the antenna capability of the UE, use a second SRS configuration to transmit one or more SRSs, wherein the second SRS configuration includes blanking one or more SRS transmissions.

[0014] In some aspects, a non-transitory computer-readable medium stores a set of instructions for wireless communication, the set of instructions including: one or more instructions, when executed by one or more processors of a user equipment (UE), causing the UE to: receive a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates the number of antenna ports on which SRS are to be transmitted; determine that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE; and, at least in part based on the determination that the first SRS configuration exceeds the antenna capacity of the UE, use a second SRS configuration to transmit one or more SRSs, wherein the second SRS configuration includes blanking one or more SRS transmissions.

[0015] In some aspects, an apparatus for wireless communication includes: components for receiving a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates a number of antenna ports on which SRS are to be transmitted; components for determining that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capability of the apparatus; and components for transmitting one or more SRSs using a second SRS configuration, at least in part based on the determination that the first SRS configuration exceeds the antenna capability of the apparatus, wherein...

[0016] The second SRS configuration includes blanking one or more SRS transmissions.

[0017] The aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment, and processing systems as generally described herein with reference to the accompanying drawings and description.

[0018] The features and technical advantages of the examples according to this disclosure have been outlined quite extensively above to facilitate a better understanding of the following detailed description. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as a basis for modifications or designs to other structures used to achieve the same purpose of this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein in terms of their organization and operation, as well as their associated advantages, will be better understood through the following description, taken in conjunction with the accompanying drawings. Each drawing is provided for illustrative and descriptive purposes and not as a limitation of the definitions in the claims. Attached Figure Description

[0019] To gain a more detailed understanding of the foregoing features of this disclosure, reference can be made to various aspects for a more specific description, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and should not be considered as limiting its scope, as the description may allow for other equally valid aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0020] Figure 1 This is a diagram illustrating an example of a wireless network according to the present disclosure.

[0021] Figure 2 This is an illustration of an example of a base station communicating with a user equipment (UE) in a wireless network according to the present disclosure.

[0022] Figure 3 This is a diagram illustrating an example of a detection reference signal (SRS) resource set according to the present disclosure.

[0023] Figure 4 This is a diagram illustrating an example of managing SRS resource switching according to this disclosure.

[0024] Figure 5 This is a diagram illustrating, for example, an exemplary process performed by a UE according to this disclosure.

[0025] Figure 6 This is a block diagram of an exemplary apparatus for wireless communication according to the present disclosure.

[0026] Figure 7 and 8 This is a diagram illustrating an example of SRS transmission configured according to the present disclosure.

[0027] Figure 9 This is a diagram illustrating an example of blanking SRS transmission based at least in part on the antenna capabilities of the UE according to this disclosure.

[0028] Figure 10 This is a diagram illustrating an example of transmitting SRS on alternating antennas according to the present disclosure.

[0029] Figure 11 The illustration is based on the present disclosure and shows an example of antenna blanking for an XT4R SRS configuration. Detailed Implementation

[0030] The various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be implemented in many different forms and should not be construed as being limited to any specific structure or function given throughout this disclosure. Rather, these aspects are provided to make this disclosure thorough and complete, and to fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or method of practice. Furthermore, the scope of this disclosure is intended to cover such apparatus or methods practiced using additional structures, functionalities, or structures and functionalities that complement or supplement the various aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0031] Several aspects of a telecommunications system will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively, "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 entire system.

[0032] It should be noted that although the terms commonly associated with 5G or NR Radio Access Technologies (RATs) are used in this document to describe the aspects, the aspects of this disclosure can be applied to other RATs, such as 3G RATs, 4G RATs and / or RATs after 5G (e.g., 6G).

[0033] Figure 1 This 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 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 a 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.

[0034] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or other types of cells. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access for UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access for UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access for UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG)). A BS used for macrocells can be referred to as a macro BS. A BS used for picocells can be referred to as a pico BS. A BS used for femtocells can be referred to as a femtocell BS or a home BS. Figure 1 In the example shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. A 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” are used interchangeably herein.

[0035] In some respects, the cell need not be stationary, and the geographical area of ​​the cell can move depending on the location of the mobile BS. In some respects, BSs can interconnect with each other and / or interconnect to 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 or virtual networks using any suitable sending network.

[0036] The wireless network 100 may also include a relay station. A relay station is an entity capable of receiving data transmissions from an upstream station (e.g., a BS or a UE) and transmitting data to a downstream station (e.g., a UE or a BS). A relay station can also be a UE capable of relaying transmissions for other UEs. Figure 1 In the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS can also be referred to as a relay station, relay base station, repeater, etc.

[0037] Wireless network 100 can be a heterogeneous network comprising different types of Base Stations (BSs) such as macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs can have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs can have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs can have lower transmit power levels (e.g., 0.1 to 2 watts).

[0038] Network controller 130 can be coupled to a set of Base Stations (BSs) and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via backhaul. These BSs can also communicate with each other directly or indirectly, for example, via wireless or wired backhaul.

[0039] UE 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE may be a cellular phone (e.g., a smartphone), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, medical device or equipment, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), entertainment device (e.g., music or video device, or satellite radio), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, GPS device, or any other suitable device configured to communicate via wireless or wired media.

[0040] Some UEs can be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, instruments, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes can, for example, provide connectivity to or to a network (e.g., a wide area network, such as the Internet or a cellular network) via wired or wireless communication links. Some UEs can be considered Internet of Things (IoT) devices and / or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered customer premises equipment (CPE). UE 120 can be included within a housing that houses the components of UE 120, such as processor components and / or memory components. In some aspects, the processor components and memory components can be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) can be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0041] 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. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0042] In some respects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary). For example, 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 or vehicle-to-infrastructure (V2I) protocols), and / or mesh networks. In this case, UEs 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as performed by base station 110.

[0043] 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 with a first frequency range (FR1), which can span from 410 MHz to 7.125 GHz, and / or can communicate using an operating band with a second frequency range (FR2), which 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 portion of FR1 is greater than 6 GHz, FR1 is generally referred to as the "sub-6 GHz" band. Similarly, FR2 is generally referred to as the "millimeter wave" band, although this is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) designated as "millimeter wave" by the International Telecommunication Union (ITU). Therefore, unless otherwise specified, it should be understood that the terms "below 6 GHz," etc., if used herein, can broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or intermediate band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specified, it should be understood that the terms "millimeter wave," etc., if used herein, can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate band frequencies (e.g., less than 24.25 GHz). It is conceivable that the frequencies included in FR1 and FR2 can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0044] As mentioned above, Figure 1 This is provided as an example only. Other examples may differ from this combination. Figure 1 The content described.

[0045] Figure 2 This 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, while the UE 120 may be equipped with R antennas 252a to 252r, wherein typically, T ≥ 1 and R ≥ 1.

[0046] At base station 110, transmit processor 220 can receive data for one or more UEs from data source 212, select one or more modulation and decoding schemes (MCS) for each UE based at least in part on the Channel Quality Indicator (CQI) received from each UE, process (e.g., encode and modulate) the data for each UE based at least in part on the selected MCS(s) for the UE, and provide data symbols for all UEs. Transmit processor 220 can also process system information (e.g., 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. Transmit processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can process its corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 can also process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t, respectively.

[0047] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations, and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can process (e.g., filter, amplify, downconvert, and digitize) the received signals to obtain input samples. Each demodulator 254 can further process the input samples (e.g., for OFDM) to obtain received symbols. MIMO detector 256 can obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on these received symbols where applicable, and provide detected symbols. Receiver processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to data sink 260, and provide decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. Among other examples, the channel processor can determine the Reference Signal Received Power (RSRP) parameter, the Received Signal Strength Indicator (RSSI) parameter, the Reference Signal Received Quality (RSRQ) parameter, and / or the CQI parameter. In some respects, one or more components of the UE 120 may be included in the housing 284.

[0048] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0049] Among other examples, antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include one or more antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays, or may be included within one or more antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays. Antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays may include collections of coplanar antenna elements and / or collections of non-coplanar antenna elements. 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. Antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays may include antenna elements coupled to one or more transmitting and / or receiving components (such as...) Figure 2 One or more antenna elements (one or more components).

[0050] On the uplink, at UE 120, the transmitting processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., reports including RSRP, RSSI, RSRQ, and / or CQI). The transmitting processor 264 can also generate reference symbols for one or more reference signals. If applicable, the symbols from the transmitting processor 264 can be pre-decoded by the TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some aspects, the modulator and demodulator of UE 120 (e.g., MOD / DEMOD 254) can be included in the modem of UE 120. In some aspects, UE 120 includes a transceiver. The transceiver may include any combination of antenna 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.

[0051] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 where applicable, and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule UE 120 for downlink and / or uplink communication. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of base station 110 may be included in the modem of base station 110. In some aspects, base station 110 includes transceiver. The transceiver may include any combination of antenna 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.

[0052] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120 and / or Figure 2Any other component may perform one or more techniques associated with managing the handover of Sounding Reference Signals (SRS) resources, 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 2 Any other component can execute or direct, for example, Figure 5 The operation of process 500 and / or other processes described herein. Memory 242 and 282 may store data and program code 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 and / or program code) for wireless communication. For example, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, transformation, and / or interpretation), may cause one or more processors, UE 120, and / or base station 110 to perform or direct, for example... Figure 5 The operation of process 500 and / or other processes as described herein. In some aspects, execution instructions may include run instructions, translation instructions, compilation instructions, and / or interpretation instructions.

[0053] In some aspects, UE 120 includes components for receiving a first SRS configuration, wherein the first SRS configuration indicates the number of antenna ports on which SRS are to be transmitted; components for determining that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE; and components for transmitting one or more SRSs using a second SRS configuration, at least in part based on the determination that the first SRS configuration exceeds the antenna capacity of the UE. Components for UE 120 to perform the operations described herein may include, for example, one or more of antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, or memory 282.

[0054] As mentioned above, Figure 2 This is provided as an example only. Other examples may differ from this combination. Figure 2 The content described.

[0055] Figure 3 This is a diagram illustrating an example 300 of an SRS resource set according to this disclosure.

[0056] Base station 110 may configure UE 120 with one or more SRS resource sets to allocate resources for SRS transmissions of UE 120. For example, the configuration of the SRS resource sets may be indicated in Radio Resource Control (RRC) messages (e.g., RRC configuration messages or RRC reconfiguration messages). In some examples, the configuration for one or more SRS resource sets may be referred to herein as a first SRS configuration. As shown by reference numeral 305, an SRS resource set may include one or more resources (e.g., shown as SRS resources), which may include time resources and / or frequency resources (e.g., time slots, symbols, resource blocks, and / or periods of time resources).

[0057] As indicated by reference numeral 310, an SRS resource may include one or more antenna ports on which SRS is to be transmitted (e.g., in a time-frequency resource). Therefore, the configuration of an SRS resource set may indicate one or more time-frequency resources on which SRS is to be transmitted, and may indicate one or more antenna ports on which SRS is to be transmitted within these time-frequency resources. It should be understood that reference herein to transmitting SRS via an antenna may mean transmitting SRS via a given antenna port or combination of antenna ports, and reference herein to switching the antenna on which SRS is to be transmitted may mean switching the antenna port on which SRS is to be transmitted or a combination of antenna ports. In some aspects, the configuration of an SRS resource set may indicate a use case / purpose of the SRS resource set (e.g., in the SRS-SetUse information element). For example, an SRS resource set may have use cases / purposes defined below: antenna switching, codebook, non-codebook, or beam management.

[0058] The antenna-switching SRS resource set can be used to transmit SRS that determines downlink channel state information (CSI) that is reciprocal between the uplink and downlink channels. For example, when there is reciprocity between the uplink and downlink channels, base station 110 can use antenna-switching SRS (e.g., SRS transmitted using resources from the antenna-switching SRS resource set) to obtain downlink CSI (e.g., to determine the downlink precoder to be used for communication with UE 120).

[0059] The codebook SRS resource set can be used to transmit an SRS for determining the uplink CSI when base station 110 indicates the uplink precoder to UE 120. For example, base station 110 can use the codebook SRS (e.g., an SRS transmitted using resources in the codebook SRS resource set) to obtain the uplink CSI. The base station can use the uplink CSI to determine the uplink precoder to indicate to UE 120, and UE 120 uses the precoder to communicate with base station 110. In some aspects, at least for the codebook SRS, virtual ports with maximum transmission power (e.g., a combination of two or more antenna ports) can be supported.

[0060] A non-codebook SRS resource set can be used to transmit SRS, which is used to determine the uplink CSI when UE 120 selects an uplink precoder. For example, when UE 120 is configured to select an uplink precoder, base station 110 can use non-codebook SRS (e.g., SRS transmitted using resources from a non-codebook SRS resource set) to obtain the uplink CSI. In this case, the non-codebook SRS can be precoded using a precoder selected by UE 120 (e.g., a precoder that can be indicated to base station 110).

[0061] Beam-managed SRS resource sets can be used to determine the CSI of millimeter-wave communications.

[0062] SRS resources can be configured as periodic, semi-persistent, or aperiodic. Periodic SRS resources can be configured via configuration messages that indicate the periodicity (e.g., slot-level periodicity, where the SRS resource occurs every Y slots) and slot offset of the SRS resource. In some cases, periodic SRS resources can remain active until deconfigured and can be neither dynamically activated nor deactivated. Semi-persistent SRS resources can be configured via configuration messages that indicate the period and slot offset of the semi-persistent SRS resource and can be dynamically activated and deactivated (e.g., using Downlink Control Information (DCI) or Media Access Control (MAC) Control Elements (CE) (MAC-CE)). Aperiodic SRS resources can be dynamically triggered, such as via DCI (e.g., UE-specific DCI or group-common DCI) or MAC-CE.

[0063] In some aspects, UE 120 can be configured with a mapping between SRS ports (e.g., antenna ports on which SRS is to be transmitted) and corresponding SRS resources. UE 120 can use the SRS ports indicated in this configuration to transmit SRS on a specific SRS resource. In some aspects, the SRS resource can span N adjacent symbols within a time slot (e.g., where N equals 1, 2, or 4). UE 120 can be configured with X SRS ports (e.g., where X ≤ 4). In some aspects, each of the X SRS ports can be mapped to a corresponding symbol of the SRS resource and used to transmit SRS in that symbol.

[0064] like Figure 3 As shown, in some aspects, different SRS resource sets indicated to UE 120 (e.g., with different use cases / purposes) can overlap (e.g., in time and / or frequency, such as in the same time slot). For example, as shown by reference numeral 315, a first SRS resource set (e.g., shown as SRS resource set 1) is shown as having an antenna switching use case / purpose. As shown, this example antenna switching SRS resource set includes a first SRS resource (shown as SRS resource A) and a second SRS resource (shown as SRS resource B). Therefore, antenna switching SRS can be transmitted in SRS resource A (e.g., a first time-frequency resource) using antenna ports 0 and 1, and antenna switching SRS can be transmitted in SRS resource B (e.g., a second time-frequency resource) using antenna ports 2 and 3.

[0065] As shown by reference numeral 320, the second SRS resource set (e.g., shown as SRS resource set 2) can have codebook use cases / purposes. As illustrated, this example codebook SRS resource set only includes the first SRS resource (shown as SRS resource A). Therefore, codebook SRS can be transmitted in SRS resource A (e.g., the first time-frequency resource) using antenna ports 0 and 1. In this case, UE 120 can transmit codebook SRS in SRS resource B (e.g., the second time-frequency resource) without using antenna ports 2 and 3.

[0066] As mentioned above, Figure 3 This is provided as an example only. Other examples may differ from this combination. Figure 3 The content described.

[0067] The base station can configure the UE to transmit SRS, such as to enable the radio channels in which the base station and the UE are operating to be heard. There can be various operating modes for SRS, depending on the number of channels to be probed. The mode can be based at least in part on the number of transmit and receive antennas (e.g., the number of transmit antenna ports and receive antenna ports) associated with the UE transmitting the SRS. For example, modes can include 1T1R (e.g., the UE uses 1 transmit antenna and 1 receive antenna), 1T2R (e.g., the UE uses 1 transmit antenna and 2 receive antennas), 1T4R (e.g., the UE uses 1 transmit antenna and 4 receive antennas), 2T4R (e.g., the UE uses 2 transmit antennas and 4 receive antennas), etc. Typically, the UE can use one or more transmit antennas and / or one or more receive antennas to transmit SRS, allowing the base station to determine downlink channel conditions (assuming the UE-BS channel and BS-UE channel are inverses) or to transmit certain information, as described in more detail elsewhere in this document. For example, a UE with a 1T4R configuration can be expected to transmit SRS via 4 antennas, since SRS is used to probe the downlink channel, and the UE is associated with 4 receive antennas (which can be used to receive downlink communications).

[0068] In some cases, a UE can be configured using SRS configurations that it cannot handle (e.g., an SRS resource set indicating the set of antenna ports used to transmit SRS at a specific time / frequency resource). For example, a UE may have hardware limitations, such as a 1T2R configuration, but can advertise the ability to perform a 1T4R SRS handover in order to be allowed network access. Such a UE can be configured with SRS configurations that exceed its hardware limitations, such as an SRS configuration that requires probing from four antennas. As another example, a UE may have shared hardware limitations. For example, one or more antennas of the UE may be shared between a first RAT (e.g., LTE) and a second RAT (e.g., NR). In this case, SRS transmission on the second RAT may negatively impact the operation of the first RAT on the shared antennas, so the UE can suppress SRS transmissions to prioritize the performance of the first RAT.

[0069] Whether due to UE hardware limitations, shared antenna configuration, or other factors, an SRS configuration exceeding the UE's capabilities (e.g., the number of antenna ports available for simultaneous SRS transmission) can lead to SRS transmission failures, thereby reducing the quality of the probe information determined by the base station. If the quality of the base station's probe information deteriorates, the utilization of UE and BS resources may become suboptimal, resulting in reduced reliability and throughput.

[0070] Some of the techniques and apparatus described herein provide management of SRS resource handover. For example, a UE may receive a first SRS configuration indicating the number of antenna ports on which to transmit SRS (e.g., one or more SRS). The UE may determine that the number of antenna ports indicated by the first SRS configuration exceeds the UE's antenna capacity. The UE may switch to a second SRS configuration, at least in part, based on the determination that the first SRS configuration exceeds the UE's antenna capacity. The second SRS configuration may include blanking one or more SRS transmissions, transmitting one or more SRS on the UE's transmit antennas (wherein blanking associated with different RATs is not performed), transmitting one or more SRS on alternating antennas, etc. In this way, the impact on SRS transmissions of the first SRS configuration exceeding the UE's antenna capacity is reduced, thereby improving the quality of probe information determined using SRS, which improves network reliability and throughput.

[0071] Figure 4 This diagram illustrates an example 400 of managing SRS resource handover according to the present disclosure. As shown, example 400 includes UE 120 and BS 110. As indicated by reference numeral 410, UE 120 may be associated with antenna capabilities. Antenna capabilities may indicate the number of antenna ports that can be used simultaneously by UE 120 (e.g., the number of receive antenna ports, transmit antenna ports, and receive antenna ports, etc.). For example, antenna capabilities may indicate the number of antenna ports on which UE 120 can transmit SRS simultaneously. Antenna capabilities may be based at least in part on the hardware configuration of UE 120 (e.g., the number of transmit and receive antennas of the UE, handover configuration indicating which antennas of UE 120 can transmit and / or receive data simultaneously, etc.), shared hardware configuration of UE 120 (e.g., one or more antennas may be shared between a first RAT and a second RAT, such as in combination with a non-standalone mode), etc. Examples of antenna capabilities include 1T1R, 1T2R, 1T4R, 2T4R, etc. In some respects, antenna capability can indicate the number of antenna ports (e.g., antennas) that UE 120 can actually (simultaneously) use, which may differ from the antenna capability reported by UE 120 for SRS handover, as described below.

[0072] As shown by reference numeral 420, UE 120 can transmit information indicating SRS handover capability. SRS handover capability indicates the number of antennas on which UE 120 can transmit SRS. SRS handover capability can be represented as 1T1R, 1T2R, 1T4R, 2T4R, etc. For example, SRS handover capability can be represented as antenna capability (which may differ from the UE's antenna capability, as described below). In some aspects, SRS handover capability can be associated with modes such as Non-Standalone (NSA) mode or Standalone (SA) mode. NSA mode can be a mode in which UE 120 operates using two or more RATs (e.g., LTE and NR), while SA mode can be a mode in which UE 120 operates using a single RAT. Because antenna sharing between RATs in NSA mode may not occur in SA mode, NSA mode and SA mode can be associated with different antenna capabilities. For example, in one aspect, the antenna capability indicated by reference numeral 410 may be for SA mode (e.g., 1T2R), and the information indicating SRS switching capability may indicate the antenna capability for NSA mode (e.g., 1T4R).

[0073] In some aspects, SRS handover capability can indicate an antenna capability different from the antenna capability shown by reference numeral 410. For example, in some cases, UE 120 can advertise an SRS handover capability greater than (e.g., indicating a greater number of available antennas than the antenna capability UE 120 can achieve in a given scenario). In some aspects, UE 120 can advertise SRS handover capability to access the network provided by BS 110. For example, BS 110 can only allow UEs that advertise a threshold SRS handover capability to access the network, so UE 120 can advertise a threshold SRS handover capability to be allowed to access the network. As another example, UE 120 can advertise an SRS handover capability associated with a first mode (e.g., NSA mode, with SRS handover capability XT4R, where X is an integer) and can have antenna capability XT2R in a second mode (e.g., SA mode). The announcement of SRS handover capabilities that differ from the antenna capabilities shown in reference numeral 410 may result in BS 110 configuring UE 120 with an SRS configuration that exceeds the antenna capabilities shown in reference numeral 410, as described in more detail below.

[0074] As shown by reference numeral 430, BS 110 may send a first SRS configuration to UE 120. For example, the first SRS configuration may be based at least in part on SRS handover capabilities sent by UE 120. The first SRS configuration may indicate one or more SRS resource sets and the set of antenna ports on which the SRS sets are to be sent. In some aspects, BS 110 may send the first SRS configuration to UE 120 via control signaling, such as RRC messages.

[0075] As indicated by reference numeral 440, UE 120 may determine that the first SRS configuration exceeds the antenna capabilities of UE 120. For example, UE 120 may determine that the number of antenna ports indicated by the first SRS configuration (e.g., the number of antenna ports on which UE 120 intends to transmit one or more SRSs indicated by the first SRS configuration) exceeds the number of antenna ports on which UE 120 can transmit simultaneously. In some aspects, UE 120 may determine that the first SRS configuration exceeds the antenna capabilities of UE 120 based at least in part on the number of transmit antenna ports indicated by the first SRS configuration, the number of receive antenna ports indicated by the first SRS configuration, or a combination thereof.

[0076] In some respects, UE 120 may determine, at least in part, that a first SRS configuration exceeds the antenna capabilities of UE 120 based on antenna blanking configurations, such as those associated with multi-RAT operation of UE 120 (e.g., multi-RAT dual connectivity (DC), E-UTRA-NR DC (EN-DC), NSA mode). For example, in multi-RAT operation, antenna blanking configurations can be used to ensure that antennas of UE 120 (e.g., transmit or receive antennas, transmit antenna ports or receive antenna ports) are available for communication on a first RAT. Antenna blanking configurations may involve blanking (e.g., dropping, suppressing) communication associated with that antenna on a second RAT. Antenna blanking may make the number of antenna ports supported by the antenna capabilities of UE 120 (e.g., antenna capabilities shown by reference numeral 410) less than the number of antenna ports advertised by UE 120 in the first SRS configuration. Therefore, UE 120 can determine, at least in part, the antenna blanking configuration associated with multi-RAT operation to determine the antenna capability of the first SRS configuration exceeding that of UE 120, as described in more detail below.

[0077] In some aspects, UE 120 may determine whether a first SRS configuration exceeds the antenna capacity of UE 120 based at least in part on a threshold, such as a threshold associated with communication quality. For example, the threshold may be a threshold block error rate (BLER) or a threshold throughput. In some aspects, UE 120 may determine whether a first SRS configuration exceeds the antenna capacity of UE 120 based at least in part on determining whether a threshold associated with communication quality is met or not. For example, UE 120 may determine that communication is associated with a threshold BLER, and therefore may determine a second SRS configuration for transmitting one or more SRSs, as described in more detail below. As another example, UE 120 may determine that communication is associated with a throughput that does not meet a threshold (e.g., throughput below the threshold), and therefore may determine a second SRS configuration for transmitting one or more SRSs, as described in more detail below.

[0078] As indicated by reference numeral 450, UE 120 may use a second SRS configuration to transmit one or more SRSs, at least in part, based on the determination that a first SRS configuration exceeds the antenna capabilities of UE 120. For example, UE 120 may determine the second SRS configuration at least in part based on the first SRS configuration exceeding the antenna capabilities of UE 120. In some aspects, UE 120 may determine the second SRS configuration at least in part based on the antenna capabilities 410 of UE 120. For example, UE 120 may determine the second SRS configuration such that the impact of the difference between the first SRS configuration and the antenna capabilities is reduced or minimized, such as reducing or minimizing the number of dropped SRS transmissions of the first SRS configuration, etc. The second SRS configuration may indicate a set of antennas / antenna ports and / or resources (such as time resources and / or frequency resources) for SRS transmissions associated with the set of antennas / antenna ports. In some aspects, the second SRS configuration may be a modification of the first SRS configuration. In some aspects, the second SRS configuration may be an SRS configuration different from the first SRS configuration (e.g., associated with a different set of SRS resources). An example of a second SRS configuration is provided below.

[0079] In some aspects, the second SRS configuration may use the primary transmit antenna of UE 120. For example, the first SRS configuration may indicate that the number of receive antennas of UE 120 exceeds the antenna capacity of UE 120 (e.g., exceeds the number of receive antennas available for transmission according to antenna capacity 410). In some aspects, UE 120 may determine, at least in part, to use the primary transmit antenna of UE 120 (e.g., the antenna port corresponding to the primary transmit antenna) to transmit one or more SRSs based on determining that the number of receive antennas indicated by the first SRS configuration exceeds the antenna capacity of UE 120. Therefore, UE 120 can improve channel detection with minimal impact on detection accuracy. As used herein, the primary transmit antenna may be a transmit antenna used for uplink communication via the primary cell of UE 120 (such as an anchor RAT via the dual RAT (e.g., NSA) mode of UE 120). In some respects, the use of a second SRS configuration for the transmission of one or more SRSs can be based at least in part on the determination that the communication associated with the first RAT is unaffected by the use of the primary transmit antenna, wherein the transmission of one or more SRSs is associated with the second RAT. The determination that the communication associated with the first RAT is unaffected can be based at least in part on the amount of time associated with the transmission of one or more SRSs, the specific communication affected by the transmission of one or more SRSs, the RAT associated with that communication, etc. For example, the first RAT could be LTE, and the second RAT could be NR.

[0080] In some respects, a second SRS configuration can allow the transmission of one or more SRSs to alternate between two or more antenna ports. For example, a second SRS configuration can allow the transmission of one or more SRSs to alternate between two or more antennas of UE 120, such as two or more receive antennas of UE 120. By transmitting one or more SRSs alternately between two or more antennas (e.g., antenna ports), UE 120 can reduce the impact of SRS transmissions on any single antenna, thereby reducing the likelihood of overall SRS blanking and improving the accuracy of channel detection.

[0081] In some respects, UE 120 may blank SRS transmissions at least in part based on a second SRS configuration. For example, UE 120 may drop or cancel the transmission of one or more SRSs at least in part based on determining that a first SRS configuration exceeds the antenna capacity of UE 120.

[0082] As mentioned above, Figure 4 This is provided as an example only. Other examples may differ from this combination. Figure 4 The content described.

[0083] Figure 5 This is a diagram illustrating an exemplary process 500 performed by a UE, for example, according to this disclosure. Exemplary process 500 is an example in which a UE (e.g., UE 120) performs operations associated with technologies used for managing SRS resource handover.

[0084] like Figure 5 As shown, in some aspects, process 500 may include receiving a first SRS configuration, wherein the first SRS configuration indicates the number of antenna ports on which SRS is to be transmitted (block 510). For example, the UE (e.g., using...) Figure 6 The receiving component 602 depicted can receive a first SRS configuration, wherein the first SRS configuration indicates the number of antenna ports (e.g., antennas) on which SRS is to be transmitted as described above.

[0085] like Figure 5 As further shown, in some aspects, process 500 may include determining that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE (block 520). For example, the UE (e.g., using...) Figure 6 The determining component 608 described herein can determine that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE, as described above.

[0086] like Figure 5 As further shown, in some aspects, process 500 may include, at least in part, using a second SRS configuration to transmit one or more SRSs based on determining that a first SRS configuration exceeds the antenna capacity of the UE (block 530). For example, the UE (e.g., using...) Figure 6 The transmitting component 604 described herein may, at least in part, use a second SRS configuration to transmit one or more SRSs based on determining that the first SRS configuration exceeds the antenna capability of the UE, as described above. The second SRS configuration may involve fewer antenna ports than indicated by the first SRS configuration. In some examples, the second SRS configuration may involve a number of antenna ports corresponding to or within the antenna capability of the UE.

[0087] Process 500 may include other aspects, such as any single aspect or any combination of aspects of one or more other processes described below and / or described elsewhere in this document.

[0088] In the first aspect, the second SRS configuration uses fewer antenna ports than the number of antenna ports used for the transmission of the one or more SRSs.

[0089] In the second aspect, either alone or in combination with the first aspect, the number of antenna ports is the number of receive antenna ports, and the transmission of the one or more SRSs using the second SRS configuration can be performed using the UE's main transmit antenna.

[0090] In the third aspect, either alone or in combination with the first aspect, at least in part based on (e.g., using) Figure 6 The determining component 608 described herein determines that communication associated with the first radio access technology is not affected by the use of the main transmitting antenna, and uses the second SRS to configure the transmission of the one or more SRSs to use the main transmitting antenna of the UE, wherein the transmission of the one or more SRSs is associated with the second radio access technology.

[0091] In the fourth aspect, the second SRS configuration is used alone or in combination with one or more of the first to third aspects to alternate the transmission of the one or more SRSs between two or more antenna ports of the UE.

[0092] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the antenna capability is a first antenna capability indicating the number of antenna ports that the UE can use simultaneously, and wherein the first SRS configuration is at least partially based on the second antenna capability reported by the UE.

[0093] In the sixth aspect, either alone or in combination with the fifth aspect, the second antenna capability is for non-independent mode, and the first antenna capability is for independent mode.

[0094] In the seventh aspect, the determination that the first SRS configuration exceeds the antenna capability of the UE is based, alone or in combination with one or more of the first to sixth aspects, on antenna blanking configurations associated with the operation of multiple radio access technologies of the UE.

[0095] In the eighth aspect, the determination that the first SRS configuration exceeds the antenna capability of the UE is based, either alone or in combination with one or more of the first to seventh aspects, on a threshold associated with the communication quality of the UE.

[0096] In the ninth aspect, thresholds associated with the communication quality of the UE, either alone or in combination with one or more of the first to eighth aspects, include threshold block error rate or threshold throughput.

[0097] although Figure 5 The illustration shows an example block of process 500, but in some respects, process 500 may include... Figure 5The blocks depicted in the diagram are compared to additional blocks, fewer blocks, different blocks, or blocks arranged differently. Alternatively, two or more blocks of process 500 can be executed in parallel.

[0098] Figure 6 This is a block diagram of an exemplary device 600 for wireless communication according to the present disclosure. Device 600 may be a UE, or a UE may include device 600. In some aspects, device 600 includes a receiving component 602 and a transmitting component 604, which can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 600 can use the receiving component 602 and the transmitting component 604 to communicate with another device 606 (such as a UE, a base station, or another wireless communication device). As further shown, among other examples, device 600 may include a determining component 608.

[0099] In some respects, device 600 can be configured to perform the functions described herein. Figure 3-4 The described one or more operations. Alternatively or concurrently, the apparatus 600 may be configured to perform one or more processes described herein, such as... Figure 5 The process 500 or a combination thereof. In some respects, Figure 6 The device 600 and / or one or more components shown may include the above combination. Figure 2 The described BS is one or more components. Alternatively or concurrently, Figure 6 One or more components shown can be combined on the above. Figure 2 Implemented within one or more of the described components. Alternatively, one or more of the components in the group may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of said component.

[0100] Receiver 602 may receive communications from device 606, such as reference signals, control information, data communications, or combinations thereof. Receiver 602 may provide the received communications to one or more other components of device 600. In some aspects, receiver 602 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference blanking, or decoding), and may provide the processed signals to one or more other components of device 606. In some aspects, receiver 602 may include combinations of the above. Figure 2 The described UE includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0101] Transmitting component 604 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 606. In some aspects, one or more other components of device 606 can generate communications and provide the generated communications to transmitting component 604 for transmission to device 606. In some aspects, transmitting component 604 can perform signal processing on the generated communications (among other examples, such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding), and can transmit the processed signals to device 606. In some aspects, transmitting component 604 can include combinations of the above. Figure 2 The described BS includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, the transmit component 604 may be co-located with the receive component 602 in a transceiver.

[0102] The receiving component 602 may receive a first SRS configuration, wherein the first SRS configuration indicates the number of antenna ports on which to transmit SRS. The determining component 608 may determine that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE. The transmitting component 604 may, at least in part, use a second SRS configuration to transmit one or more SRSs based on the determination that the first SRS configuration exceeds the antenna capacity of the UE.

[0103] Figure 6 The number and arrangement of components shown are provided as an example. In reality, they can exist in combination with... Figure 6 The components shown are those that are additional, fewer, different, or arranged differently compared to other components. Furthermore, Figure 6 The two or more components shown can be implemented within a single component, or Figure 6 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 6 The set of (one or more) components shown can perform the actions described by [the description]. Figure 6 The other set of components shown performs one or more functions.

[0104] Figure 7 and 8These are illustrations of examples 700 and 800 of SRS transmission according to an SRS configuration based on this disclosure. The SRS configuration of examples 700 and 800 may be a second SRS configuration. Examples 700 and 800 include resource grids that may each span slots. A given resource grid corresponds to an SRS port. As shown in example 700, a resource grid or set of SRS resources for a dual-antenna SRS configuration (e.g., for SRS transmission via two antenna ports) may include a first SRS resource (e.g., resource 0 at symbol l0) and a second SRS resource (e.g., resource 1 at symbol l1). Resource 0 is shown with square fill, and resource 1 is shown with diagonal fill. Example 700 also illustrates transmission via a first antenna (shown as Ant 0 and corresponding to a first antenna port or antenna port group) and a second antenna (shown as Ant 1 and corresponding to a second antenna port or antenna port group). As shown, in symbol l0, the UE may transmit SRS via antenna 0. In symbol l1, the UE may transmit SRS via antenna 1. Therefore, the UE can be configured to send SRS according to the SRS configuration.

[0105] If Example 700 includes four antennas (e.g., antennas 0, 1, 2, and 3) and a single SRS port, the SRS configuration can map SRS resources to symbols l0, l1, l2, and l3, which can occur in the same or different time slots. The UE can transmit the corresponding SRS resources in each of symbols l0, l1, l2, and l3 via the corresponding antennas in antennas 0, 1, 2, and 3.

[0106] Example 800 includes two SRS ports and relates to a UE associated with four antennas (e.g., 2T4R). For example, a resource grid (e.g., an SRS resource set) for the first SRS port (SRS port 0) and a resource grid (e.g., an SRS resource set) for the second SRS port (SRS port 1) are shown. In Example 800, symbols 10 and 11 each include two SRS transmissions: a first SRS resource transmitted via SRS ports 0 and 1, and a second SRS resource transmitted via SRS ports 0 and 1. In this disclosure, "transmitting SRS resources" can refer to transmitting SRS within SRS resources. Thus, as shown, the UE can transmit the first SRS resource in symbol 10 via antenna 0 and via antenna 1, and can transmit the second SRS resource in symbol 11 via antenna 2 and via antenna 3.

[0107] Figure 9 This is a diagram illustrating an example 900 of blanking SRS transmission based at least in part on the antenna capabilities of the UE according to the present disclosure. Figure 9A resource grid (e.g., a set of SRS resources) is shown for SRS configurations (e.g., a first SRS configuration) at slots n, n+P, and n+2P, where n and P are integers. Below the resource grid for a given slot, transmissions at symbol l0 and symbol l1 of the given slot are shown. As indicated by reference numeral 910, the UE may not transmit SRS on antenna 1 at symbol l1 of slot n+P. In other words, SRS transmissions on antenna 1 at symbol l1 of slot n+P can be blanked. For example, the UE may not transmit SRS at least in part based on determining that the SRS configuration exceeds the UE's antenna capacity. In some aspects, the UE may not transmit SRS at least in part based on an antenna blanking configuration. An antenna blanking configuration may indicate one or more antenna ports on which transmissions of SRS resources should be dropped / blanked. In some aspects, the UE may not transmit SRS as shown by reference numeral 910 at least in part based on a second SRS configuration. Therefore, the UE can reduce the use of antenna 1 for SRS transmission, thereby improving the coexistence between SRS signaling and other communications, such as intra-RAT or inter-RAT communication.

[0108] Figure 10 This is an illustration of Example 1000, which transmits SRS on alternating antennas according to the present disclosure. Example 1000 includes a resource grid set similar to that of Example 900 (e.g., an SRS resource set), which may be defined, for example, by a first SRS configuration. In Example 1000, as shown by reference numeral 1010, the UE may transmit SRS on antenna 0 at both symbols 10 and 11. For example, the UE may transmit SRS in two symbols on antenna 0, at least in part, based on determining that the SRS configuration exceeds the UE's antenna capabilities, such as according to a second SRS configuration. Therefore, the UE can reduce the impact of SRS transmission on antenna 1 while continuing to transmit SRS, which improves the accuracy of SRS and thus improves throughput and network resource utilization.

[0109] Figure 11This is a diagram illustrating Example 1100 for 4R antenna blanking in a 1T4 SRS configuration according to the present invention. As shown, Example 1100 includes a resource grid or set of SRS resources for a single SRS port associated with time slots n and n+1, and this resource grid or set of SRS resources is associated with four SRS resources corresponding to four antennas: a first SRS resource shown as a square filled during symbol l0 of time slot n, a second SRS resource shown as a diagonal filled during symbol l1 of time slot n, a third SRS resource shown as a horizontal line filled during symbol n+1 of time slot n, and a fourth SRS resource shown as a dashed line filled during another symbol of time slot n+1. As shown by the black fill of antennas 2 and 3, the UE can determine not to transmit SRS resources on antennas 2 and 3 during time slot n+1. For example, based at least in part on the determination that the SRS configuration exceeds the antenna capabilities of the UE, the UE can transmit SRS on antenna 0 during symbols l0 and l1 of time slot n, but not on antennas 2 and 3 during time slot n+1. Therefore, the UE can continue to transmit a subset of SRS on antennas 0 and 1 while reducing the impact of SRS transmission on antennas 2 and 3. This improves SRS accuracy and thus increases throughput and network resource utilization without overwhelming the UE's antenna capabilities.

[0110] As mentioned above, Figure 7-11 It is provided as one or more examples. Other examples may differ from the combination. Figure 7-11 The content described.

[0111] The following provides an overview of some aspects of this disclosure:

[0112] Aspect 1: A method of wireless communication performed by a user equipment (UE) includes: receiving a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates a number of antenna ports on which SRS are to be transmitted; determining that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE; and transmitting one or more SRSs using a second SRS configuration, based at least in part on the determination that the first SRS configuration exceeds the antenna capacity of the UE.

[0113] Aspect 2: According to the method of aspect 1, wherein the transmission of the one or more SRS using the second SRS configuration uses fewer antenna ports than the number of antenna ports.

[0114] Aspect 3: The method according to any one of Aspects 1-2, wherein the number of antenna ports is the number of receive antenna ports, and wherein the transmission of the one or more SRSs using the second SRS configuration uses the UE's main transmit antenna.

[0115] Aspect 4: According to the method of aspect 3, wherein the transmission of the one or more SRS configured using the second SRS is based at least in part on determining that the communication associated with the first radio access technology is not affected by the use of the main transmitting antenna, and wherein the transmission of the one or more SRS is associated with the second radio access technology.

[0116] Aspect 5: According to the method of any one of Aspects 1-2, wherein the transmission of the one or more SRS configured using the second SRS alternates between two or more antenna ports of the UE.

[0117] Aspect 6: The method according to any one of Aspects 1-5, wherein the antenna capability is a first antenna capability indicating the number of antenna ports that the UE can use simultaneously, and wherein the first SRS configuration is at least partially based on the second antenna capability reported by the UE.

[0118] Aspect 7: According to the method of aspect 6, wherein the second antenna capability is for non-standalone mode and the first antenna capability is for standalone mode.

[0119] Aspect 8: The method according to any one of Aspects 1-7, wherein determining that the first SRS configuration exceeds the antenna capability of the UE is based at least in part on an antenna blanking configuration associated with the operation of multiple radio access technologies of the UE.

[0120] Aspect 9: The method of any one of Aspects 1-8, wherein determining that the first SRS configuration exceeds the antenna capability of the UE is based at least in part on a threshold associated with the communication quality of the UE.

[0121] Aspect 10: According to Method Aspect 9, the thresholds associated with the communication quality of the UE include threshold block error rate or threshold throughput.

[0122] Aspect 11: An apparatus for wireless communication at a device, the apparatus comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods of aspects 1-10.

[0123] Aspect 12: An apparatus for wireless communication, the apparatus including a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform a method according to one or more aspects of aspects 1-10.

[0124] Aspect 13: An apparatus for wireless communication, the apparatus comprising at least one component for performing a method according to one or more aspects 1-10.

[0125] Aspect 14: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform the methods of one or more aspects of aspects 1-10.

[0126] Aspect 15: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform one or more methods of aspects 1-10.

[0127] The foregoing disclosure provides illustrations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made based on the foregoing disclosure, or may be derived from practice in the areas described.

[0128] As used herein, the term "component" is intended to be interpreted broadly as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented using 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 various forms of hardware, firmware, and / or hardware and software combinations. The actual dedicated control hardware or software code used to implement these systems and / or methods does not impose any limitations in any respect. Therefore, the operation and behavior of these systems and / or methods are described herein without reference to any specific software code—it should be understood that software and hardware can be designed to implement these systems and / or methods, at least in part, based on the description herein.

[0129] As used in this article, the threshold can refer to values ​​such as greater than the threshold, greater than or equal to the threshold, less than or equal to the threshold, or not equal to the threshold, depending on the context.

[0130] Although specific combinations of features are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of different aspects. In fact, many of these features can be combined in ways not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below may be directly dependent on only one claim, the disclosure of different aspects includes each dependent claim being combined with each other claim in this set of claims. The phrase “...at least one of ...” as used herein refers to any combination of these items, including single members. As an example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination having multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbb, cc, and ccc, or any other ordering of a, b, and c).

[0131] None of the elements, actions, or instructions used herein should be construed as essential or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “one” are intended to include one or more items and are interchangeable with “one or more.” Additionally, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and is interchangeable with “the one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items) and are interchangeable with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Moreover, as used herein, the terms “having” and the like are intended to be open-ended terms. Furthermore, the phrase “based on” is intended to mean “at least partially based on” unless explicitly stated otherwise. Furthermore, as used herein, the terms “or” are inclusive when used consecutively and may be used interchangeably with “and / or” unless otherwise explicitly stated (e.g., if used in combination with “either of both” or “only one of ...”).

Claims

1. A method for wireless communication performed by a user equipment (UE), comprising: Receive a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates the number of antenna ports on which to transmit SRS; It is determined that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE; as well as At least in part, based on the determination that the first SRS configuration exceeds the antenna capability of the UE, a second SRS configuration is used to transmit one or more SRSs, wherein The second SRS configuration includes blanking one or more SRS transmissions.

2. The method of claim 1, wherein the transmission of the one or more SRSs using the second SRS configuration uses fewer antenna ports than the number of antenna ports.

3. The method of claim 1, wherein using a second SRS configuration to transmit one or more SRSs based at least in part on determining that the first SRS configuration exceeds the antenna capability of the UE comprises: When the UE performs wireless communication using multiple radio access technology (RAT), it blanks one or more SRS transmissions on the second RAT according to the second SRS configuration. The multiple RATs mentioned therein include at least a first RAT and a second RAT.

4. The method of claim 3, wherein blanking one or more SRS transmissions on the second RAT according to the second SRS configuration comprises: According to the second SRS configuration, one or more SRS transmissions on the second RAT can be dropped, suppressed, or canceled.

5. The method of claim 1, wherein the number of antenna ports is the number of receive antenna ports, and wherein the transmission of the one or more SRSs using the second SRS configuration uses the UE's main transmit antenna.

6. The method of claim 5, wherein the transmission of the one or more SRSs configured using the second SRS is based at least in part on determining that communication associated with the first radio access technology is unaffected by the use of the main transmit antenna, and wherein the transmission of the one or more SRSs is associated with the second radio access technology.

7. A user equipment (UE) for wireless communication, comprising: Memory; and One or more processors operably coupled to the memory, the memory and the one or more processors being configured to: Receive a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates the number of antenna ports on which to transmit SRS; It is determined that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE; as well as At least in part, based on the determination that the first SRS configuration exceeds the antenna capability of the UE, a second SRS configuration is used to transmit one or more SRSs, wherein The second SRS configuration includes blanking one or more SRS transmissions.

8. The UE of claim 7, wherein the transmission of the one or more SRSs using the second SRS configuration uses fewer antenna ports than the number of antenna ports.

9. The UE of claim 7, wherein using a second SRS configuration to transmit one or more SRSs based at least in part on determining that the first SRS configuration exceeds the antenna capability of the UE comprises: When the UE performs wireless communication using multiple radio access technology (RAT), it blanks one or more SRS transmissions on the second RAT according to the second SRS configuration. The multiple RATs mentioned therein include at least a first RAT and a second RAT.

10. The UE of claim 9, wherein blanking one or more SRS transmissions on the second RAT according to the second SRS configuration comprises: According to the second SRS configuration, one or more SRS transmissions on the second RAT can be dropped, suppressed, or canceled.

11. The UE of claim 7, wherein the number of antenna ports is the number of receive antenna ports, and wherein the transmission of the one or more SRSs using the second SRS configuration uses the UE's main transmit antenna.

12. The UE of claim 11, wherein the transmission of the one or more SRSs configured using the second SRS is based at least in part on determining that communication associated with the first radio access technology is unaffected by the use of the main transmit antenna, wherein the transmission of the one or more SRSs is associated with the second radio access technology.

13. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: One or more instructions, when executed by one or more processors of a user equipment (UE), cause the UE to: Receive a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates the number of antenna ports on which to transmit SRS; It is determined that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capacity of the UE; as well as At least in part, based on the determination that the first SRS configuration exceeds the antenna capability of the UE, a second SRS configuration is used to transmit one or more SRSs, wherein The second SRS configuration includes blanking one or more SRS transmissions.

14. The non-transitory computer-readable medium of claim 13, wherein the transmission of the one or more SRSs using the second SRS configuration uses fewer antenna ports than the number of antenna ports.

15. The non-transitory computer-readable medium of claim 13, wherein transmitting one or more SRSs using a second SRS configuration based at least in part on determining that the first SRS configuration exceeds the antenna capability of the UE comprises: When the UE performs wireless communication using multiple radio access technology (RAT), it blanks one or more SRS transmissions on the second RAT according to the second SRS configuration. The multiple RATs mentioned therein include at least a first RAT and a second RAT.

16. The non-transitory computer-readable medium of claim 15, wherein blanking one or more SRS transmissions on the second RAT according to the second SRS configuration comprises: According to the second SRS configuration, one or more SRS transmissions on the second RAT can be dropped, suppressed, or canceled.

17. The non-transitory computer-readable medium of claim 13, wherein the number of antenna ports is the number of receive antenna ports, and wherein the transmission of the one or more SRSs using the second SRS configuration uses the UE's main transmit antenna.

18. The non-transitory computer-readable medium of claim 17, wherein the transmission of the one or more SRSs configured using the second SRS is based at least in part on the determination that communications associated with the first radio access technology are unaffected by the use of the main transmit antenna, and wherein the transmission of the one or more SRSs is associated with the second radio access technology.

19. An apparatus for wireless communication, comprising: A component for receiving a first sounding reference signal (SRS) configuration, wherein the first SRS configuration indicates the number of antenna ports on which to transmit SRS; A component for determining that the number of antenna ports indicated by the first SRS configuration exceeds the antenna capability of the device; as well as A component for transmitting one or more SRSs using a second SRS configuration, at least in part based on determining that the first SRS configuration exceeds the antenna capability of the device, wherein The second SRS configuration includes blanking one or more SRS transmissions.

20. The apparatus of claim 19, wherein the transmission of the one or more SRSs using the second SRS configuration uses fewer antenna ports than the number of antenna ports.

21. The apparatus of claim 19, wherein using a second SRS configuration to transmit one or more SRSs based at least in part on determining that the first SRS configuration exceeds the antenna capability of the UE comprises: When the UE performs wireless communication using multiple radio access technology (RAT), it blanks one or more SRS transmissions on the second RAT according to the second SRS configuration. The multiple RATs mentioned therein include at least a first RAT and a second RAT.

22. The apparatus of claim 21, wherein blanking one or more SRS transmissions on the second RAT according to the second SRS configuration comprises: According to the second SRS configuration, one or more SRS transmissions on the second RAT can be dropped, suppressed, or canceled.

23. The apparatus of claim 19, wherein the number of antenna ports is the number of receive antenna ports, and wherein the transmission of the one or more SRSs using the second SRS configuration utilizes the main transmit antenna of the apparatus.

24. The apparatus of claim 23, wherein the transmission of the one or more SRSs configured using the second SRS is based at least in part on determining that communication associated with the first radio access technology is unaffected by the use of the main transmitting antenna, wherein the transmission of the one or more SRSs is associated with the second radio access technology.

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