Dynamic reconfiguration associated with transmitting sounding reference signal (SRS) information

Abstract

Aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information including SRS configuration associated with a configured sounding reference signal (SRS) resource. The UE may receive a media access control (MAC) control element (MAC CE) or downlink control information (DCI) including reconfiguration information associated with the SRS resource. The UE may transmit SRS information including a selected SRS resource selected from the configured SRS resources using a selected SRS port at least in part based on the reconfiguration information. Numerous other aspects are described.

Description

[0001] Public domain

[0002] Aspects of the present disclosure generally relate to wireless communications and relate to techniques and apparatus for dynamic reconfiguration associated with transmitting sounding reference signal (SRS) information.

[0003] Background

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

[0005] A wireless network may include several base stations (BSs) capable of supporting communication of several user equipments (UEs). The UE may communicate with the BS via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, the BS may be referred to as a B node, gNB, access point (AP), radio head, transmission reception point (TRP), new radio (NR) BS, 5G B node, 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 equipments to communicate at the urban, national, regional, and even global levels. NR (which may also be referred to as 5G) is an enhanced set of mobile standards for LTE promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) (CP-OFDM) on the downlink (DL), CP-OFDM and / or SC-FDM (e.g., also referred to 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 spectral efficiency, reduce cost, improve services, utilize new spectrums, 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 are still useful.

[0007] Overview

[0008] 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 configuration information including SRS configuration associated with configured sounding reference signal (SRS) resources; receive a media access control (MAC) control element (MAC CE) or downlink control information (DCI) including reconfiguration information associated with the SRS resources; and transmit SRS information including a selected SRS resource selected from the configured SRS resources using a selected SRS port at least in part based on the reconfiguration information.

[0009] In some aspects, a wireless communication method performed by a UE includes: receiving configuration information including SRS configuration associated with configured SRS resources; receiving a MAC CE or DCI including reconfiguration information associated with the SRS resources; and transmitting SRS information including a selected SRS resource selected from the configured SRS resources using a selected SRS port at least in part based on the reconfiguration information.

[0010] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive configuration information including SRS configuration associated with configured SRS resources; receive a MAC CE or DCI including reconfiguration information associated with the SRS resources; and transmit SRS information including a selected SRS resource selected from the configured SRS resources using a selected SRS port at least in part based on the reconfiguration information.

[0011] In some aspects, a device for wireless communication includes: means for receiving configuration information including SRS configuration associated with configured SRS resources; means for receiving a MAC CE or DCI including reconfiguration information associated with the SRS resources; and means for transmitting SRS information including a selected SRS resource selected from the configured SRS resources using a selected SRS port at least in part based on the reconfiguration information.

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

[0013] The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with this disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes as 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 both their organization and method of operation, as well as the associated advantages, will be better understood upon consideration of the following description in conjunction with the accompanying drawings. Each of the drawings is provided for purposes of illustration and description, and is not to be construed as defining a limitation of the claims. Brief Description of the Drawings

[0015] To understand the features described above in more detail, reference may be made to the various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the drawings illustrate only some typical aspects of this disclosure and should not be considered as limiting its scope, as the description may admit of 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 this disclosure.

[0017] Figure 2 is a diagram illustrating an example of a base station and a UE in communication in a wireless network in accordance with various aspects of this disclosure.

[0018] Figure 3 is a diagram illustrating an example associated with dynamic reconfiguration related to transmitting sounding reference signal (SRS) information in accordance with various aspects of this disclosure.

[0019] Figure 4 is a diagram illustrating an example associated with dynamic reconfiguration related to transmitting sounding reference signal (SRS) information in accordance with various aspects of this disclosure.

[0020] Figure 5 is a diagram illustrating an example associated with dynamic reconfiguration related to transmitting sounding reference signal (SRS) information in accordance with various aspects of this disclosure.

[0021] Figure 6 is a diagram illustrating an example process associated with dynamic reconfiguration related to transmitting sounding reference signal (SRS) information in accordance with various aspects of this disclosure.

[0022] Figure 7 is a diagram illustrating an example apparatus associated with dynamic reconfiguration related to transmitting sounding reference signal (SRS) information in accordance with various aspects of this disclosure.

[0023] Detailed Description

[0024] Aspects of the present disclosure are described more fully hereinafter with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art should appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the present disclosure. For example, any number of the aspects set forth herein may be used to implement an apparatus or practice a method. Additionally, the scope of the present disclosure is intended to cover such apparatus or methods practiced using other structures, functionality, or a combination of structures and functionality that supplement or are additional to the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of a claim.

[0025] Certain aspects of a telecommunications system will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in detail below and illustrated in the drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0026] It should be noted that while aspects may be described herein using terms commonly associated with 5G or NR radio access technology (RAT), aspects of the present disclosure may be applied to other RATs such as 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G).

[0027] Figure 1 FIG. is a diagram illustrating an example of a wireless network 100 in accordance with various aspects of the present disclosure. The wireless network 100 may be a 5G (NR) network and / or an LTE network, etc., 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, Node B, gNB, 5G Node B (NB), access point, transmission reception point (TRP), etc. Each BS may provide communication coverage for a particular 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.

[0028] The BS can provide communication coverage for macro cells, pico cells, femto cells, and / or another type of cell. A macro cell can cover a relatively large geographical area (e.g., with a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A pico cell can cover a relatively small geographical area and can allow unrestricted access by UEs with service subscriptions. A femto cell can cover a relatively small geographical area (e.g., a residence) and can allow restricted access by UEs associated with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG)). The BS for a macro cell can be referred to as a macro BS. The BS for a pico cell can be referred to as a pico BS. The BS for a femto cell can be referred to as a femto BS or a home BS. In Figure 1 the example shown in, 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. The BS can support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" can be used interchangeably herein.

[0029] In some aspects, the cell may not have to be stationary, and the geographical area of the cell can move according to the location of the mobile BS. In some aspects, the BSs can be interconnected with each other and / or interconnected to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as direct physical connections or virtual networks using any suitable transport network.

[0030] The wireless network 100 may also include relay stations. A relay station is an entity that can receive the transmission of data from an upstream station (e.g., a BS or a UE) and send the transmission of the data to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that can relay transmissions for other UEs. In Figure 1 the example shown in, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. The relay BS can also be referred to as a relay station, a relay base station, a relay, etc.

[0031] The wireless network 100 can be a heterogeneous network including different types of BSs (such as 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 pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0032] The network controller 130 can be coupled to the set of BSs and can provide coordination and control of these BSs. The network controller 130 can communicate with each BS via a backhaul. These BSs can also communicate with each other directly or indirectly via a wireless or wired backhaul.

[0033] UEs 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UEs can also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, a superbook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, 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.

[0034] 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, and / or location tags, 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 a network (e.g., a wide area network such as the Internet or a cellular network) or provide connectivity to the 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 narrowband IoT (NB-IoT) devices. Some UEs may be considered customer premise equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120, such as processor components and / or memory components. In some aspects, the processor components and the memory components may be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0035] Generally, any number of wireless networks may be deployed in a given geographical area. Each wireless network may support a specific RAT and may operate on one or more frequencies. The RAT may also be referred to as a radio technology, an air interface, etc. The frequency may also be referred to as a carrier, a frequency channel, etc. Each frequency may support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, an NR or 5G RAT network may be deployed.

[0036] In some aspects, 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., communicate with each other without using the base station 110 as an intermediary). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols), and / or a mesh network. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as performed by the base station 110.

[0037] Devices of the wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, devices of the wireless network 100 can communicate using an operating band having a first frequency range (FR1) and / or can communicate using an operating band having a second frequency range (FR2). The first frequency range (FR1) can span from 410 MHz to 7.125 GHz, and the second frequency range (FR2) 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, although different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) identified by the International Telecommunication Union (ITU) as the "millimeter wave" band, FR2 is generally referred to as the "millimeter wave" band. Thus, unless otherwise specifically stated, it should be understood that if used herein, terms such as "sub-6 GHz" can generically represent frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specifically stated, it should be understood that if used herein, terms such as "millimeter wave" can generically represent 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 can be modified, and the techniques described herein apply to those modified frequency ranges.

[0038] As indicated above, Figure 1 is provided as an example. Other examples can be different from those Figure 1 described.

[0039] Figure 2 is a diagram illustrating Example 200 in which a base station 110 and a UE 120 are in communication in the wireless network 100 according to various aspects of the present disclosure. The base station 110 can be equipped with T antennas 234a to 234t, and the UE 120 can be equipped with R antennas 252a to 252r, where generally T≥1 and R≥1.

[0040] At base station 110, a transmit processor 220 may receive data for one or more UEs from a data source 212, select one or more modulation and coding schemes (MCSs) for the UE at least in part based on channel quality indicators (CQIs) received from each UE, process (e.g., encode and modulate) the data for the UE at least in part based on the selected MCS(s) for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRSs) or demodulation reference signals (DMRSs)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process its respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may further 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 through 232t may be transmitted via T antennas 234a through 234t, respectively.

[0041] At the UE 120, antennas 252a through 252r may receive downlink signals from the base station 110 and / or other base stations and may provide the received signals to demodulators (DEMOD) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. The MIMO detector 256 may obtain the received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide the decoded data for the UE 120 to the data sink 260, and provide the decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine reference signal received power (RSRP) parameters, received signal strength indicator (RSSI) parameters, reference signal received quality (RSRQ) parameters, and / or channel quality indicator (CQI) parameters, etc. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0042] 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.

[0043] Antennas (e.g., antennas 234a through 234t and / or antennas 252a through 252r) may include one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, etc., or may be included therein. The antenna panel, antenna group, antenna element set, and / or antenna array may include one or more antenna elements. The antenna panel, antenna group, antenna element set, and / or antenna array may include a coplanar antenna element set and / or a non-coplanar antenna element set. The antenna panel, antenna group, antenna element set, and / or antenna array may include antenna elements within a single housing and / or antenna elements within multiple housings. The antenna panel, antenna group, antenna element set, and / or antenna array may include one or more antenna elements coupled to one or more transmit and / or receive components (such as Figure 2 one or more components) of

[0044] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 when applicable, further processed by the modulators 254a to 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of the UE 120 may be included in the modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antennas 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and the memory 282 to perform aspects of any of the methods described herein, e.g., as referred to Figures 3 - 7 as described.

[0045] At the base station 110, the uplink signals from the UE 120 and other UEs may be received by the antennas 234, processed by the demodulator 232, detected by the MIMO detector 236 when applicable, and further processed by the receive processor 238 to obtain the decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communication. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of the base station 110 may be included in the modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antennas 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and the memory 242 to perform aspects of any of the methods described herein, e.g., as referred to Figures 3 - 7 as described.

[0046] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 any other component(s) thereof may perform one or more techniques associated with dynamic reconfiguration related to transmitting sounding reference signal (SRS) information, 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(s) thereof may perform or direct the operation of, for example, Figure 6 process 600 and / or other processes as described herein. Memories 242 and 282 may store data and program code for use by 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 for wireless communication (e.g., code and / or program code). For example, when the one or more instructions are executed (e.g., directly executed, or after compilation, conversion, and / or interpretation) by one or more processors of base station 110 and / or UE 120, the one or more processors, UE 120, and / or base station 110 may perform or direct the operation of, for example, Figure 6 process 600 and / or other processes as described herein. In some aspects, executing the instructions may include running the instructions, converting the instructions, compiling the instructions, and / or interpreting the instructions, etc.

[0047] In some aspects, a UE (e.g., UE 120) includes means for receiving configuration information including an SRS configuration associated with configured SRS resources; means for receiving a MAC CE or DCI including reconfiguration information associated with these SRS resources; and / or means for transmitting SRS information including selected SRS resources selected from the configured SRS resources using a selected SRS port, at least in part based on the reconfiguration information. The means for a UE 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.

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

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

[0050] A UE may perform data communication with a BS in a wireless network such as an LTE network or a 5G / NR network. The BS and the UE may utilize respective transmission and reception circuitry to perform data communication. The data communication may include downlink communication from the BS to the UE and may include uplink communication from the UE to the BS.

[0051] To adequately receive uplink communication from the UE, the BS may estimate a measure of quality associated with the uplink communication. To enable the BS to estimate the measure of quality, the UE may utilize a configuration of SRS ports to transmit SRS information including a fixed number of SRS resources. Based on the received SRS information, the BS may estimate the measure of quality associated with the uplink communication. The SRS resources may be configured by the BS to enable the UE to perform, for example, antenna switching operations, codebook-based operations, non-codebook-based operations, beam management operations, etc.

[0052] The configuration of the SRS ports used by the UE to transmit SRS information may be fixed based on the channel conditions present during the initiation of data communication between the BS and the UE. However, since the channel conditions may change based on, for example, the movement of the UE within the environment, the fixed configuration of the SRS ports may not be optimal for transmitting SRS information during data communication.

[0053] For example, during data communication, the channel associated with the ports of the fixed configuration may experience poor channel conditions (e.g., the measure of quality associated with the channel conditions is less than a threshold channel condition level), and when the UE transmits SRS information using that port, the BS may not be able to adequately receive the SRS information. As a result, the BS may not be able to adequately estimate the measure of quality associated with the uplink communication and may thus not be able to adequately receive uplink communication from the UE. Consequently, the data communication between the UE and the BS may experience an interruption or a stop.

[0054] For a fixed number of SRS resources, the UE may have to transmit all of the configured SRS resources, even though it may be sufficient for the BS to receive a subset of the configured SRS resources to estimate the measure of quality associated with the uplink communication. Transmitting all of the configured SRS resources may inefficiently consume UE resources (e.g., processing power, memory utilization, power consumption, etc.) and network resources (e.g., bandwidth, management resources, etc.), which could be more effectively utilized to perform other tasks related to data communication.

[0055] Aspects of the techniques and apparatus described herein can enable dynamic reconfiguration associated with transmitting SRS information. In some aspects, during the initiation of data communication between a BS and a UE, the UE can receive an initial configuration for transmitting SRS information including one or more SRS resources using one or more SRS ports. During data communication, the UE can receive dynamic signaling (e.g., media access control (MAC) signaling (MAC CE) including control elements, downlink control information (DCI) signaling, or a combination thereof) to dynamically reconfigure the UE to transmit SRS information including selected SRS resources using selected SRS ports. The dynamic reconfiguration can be based on the channel conditions present during data communication. As a result, the UE can transmit SRS information using the selected (e.g., best) SRS ports, where the SRS information includes the selected SRS resources with metrics sufficient for the BS to estimate the quality associated with the uplink communication. In this way, the BS can adequately receive the uplink communication from the UE, and the data communication between the UE and the BS can continue without interruption. Additionally, transmitting SRS information including the selected SRS resources using the selected SRS ports can enable efficient utilization of UE resources (e.g., throughput, memory utilization, etc.) and network resources (e.g., bandwidth, subchannels, etc.). In this way, data communication between the UE and the BS can be improved.

[0056] In some aspects, the UE can receive configuration information including SRS configurations associated with SRS resources; receive MAC CE or DCI including reconfiguration information associated with these SRS resources; and transmit SRS information including selected SRS resources selected from these SRS resources using selected SRS ports, at least in part based on the reconfiguration information. As used herein, "transmit SRS resources" is synonymous with "transmit SRS on SRS resources".

[0057] Figures 3 - 5 is a diagram illustrating examples 300, 400, and 500 associated with dynamic reconfiguration associated with transmitting SRS information in accordance with various aspects of the present disclosure. Figure 3 Illustrates a UE 120 and a BS 110 communicating data, for example, in an LTE network or a 5G / NR network. The data communication can include downlink communication from the BS 110 to the UE 120 and can include uplink communication from the UE 120 to the BS 110.

[0058] As indicated by reference numeral 310, the BS 110 may transmit configuration information at the start of data communication (e.g., during initiation), and the UE 120 may receive the configuration information. In some aspects, the UE 120 may receive configuration information from a device other than the BS 110 (e.g., from another base station). In some aspects, the UE 120 may receive configuration information via, for example, a control channel (e.g., Physical Downlink Control Channel (PDCCH)) between the UE 120 and the BS 110. The configuration information may be conveyed via Radio Resource Control (RRC) signaling, MAC signaling (e.g., MAC CE), DCI signaling, or a combination thereof (e.g., RRC configuration for a set of values of a parameter and DCI indication of the selected value of the parameter).

[0059] In some aspects, the configuration information may include information associated with configuring the UE 120 to have one or more SRS resource sets, each SRS resource set including a respective one or more SRS resources (e.g., the configured SRS resources). The configured SRS resources may be used by the UE 120 to perform, for example, SRS signaling antenna switching operations, codebook-based operations, non-codebook-based operations, beam management operations, etc. For example, as Figure 4 shown in Example 400, the UE 120 may be configured with two resource sets (e.g., SRS resource set 1 and SRS resource set 2) including the configured SRS resources. SRS resource set 1 may include, for example, four SRS resources having respective resource IDs (resource ID #2, resource ID #3, resource ID #4, and resource ID #6). SRS resource set 2 may include, for example, two SRS resources having respective resource IDs (resource ID #1 and resource ID #5). In some aspects, SRS resource set 1 and SRS resource set 2 including all the configured SRS resources may be collectively referred to as a superset. As discussed herein, "SRS resource having resource ID #2" is synonymous with "resource ID #2".

[0060] In some aspects, the configuration information may include an indication of, for example, one or more configuration parameters for the UE 120 to be used to configure the UE 120 for data communication. The configuration information may include an initial configuration associated with transmitting SRS information. The initial configuration may indicate that the UE 120 will transmit SRS information including all the configured SRS resources using one or more fixed SRS ports.

[0061] Regarding the SRS resources, the initial configuration may include one or more predefined orders of the configured SRS resources to be included in the SRS information. The one or more predefined orders of the configured SRS resources may be defined according to the resource identifiers and may be included in a resource identifier list (e.g., srs-ResourceIdList).

[0062] In one example, the predefined order may include resource identifiers in ascending order. For example, with respect to Figure 4 Example 400 of, the ascending order may indicate that the configured SRS resources will be sorted as Resource ID#1, Resource ID#2, Resource ID#3, Resource ID#4, Resource ID#5, and Resource ID#6 in the SRS information. In another example, the predefined order may include resource identifiers in the arrangement order within the SRS resource set. For example, the arrangement order may indicate that the SRS resources from SRS resource set 1 will be sorted as Resource ID#2, Resource ID#4, Resource ID#3, and Resource ID#6 in the SRS information. Similarly, the arrangement order may indicate that the SRS resources from SRS resource set 2 will be sorted as Resource ID#1 and Resource ID#5 in the SRS information.

[0063] In yet another example, the predefined order may include an interleaved order or an interlaced order. In the interleaved order, the configured SRS resources may be included in the SRS information according to the SRS resource sets. For example, the interleaved order may indicate that the SRS resources from SRS resource set 1 will be included before the SRS resources from SRS resource set 2, or vice versa. In the interlaced order, the SRS resources from the SRS resource sets may be interlaced such that the SRS resources from the SRS resource sets are alternately included in the SRS information. With respect to Figure 4 Example 400 of, the interlaced order may indicate that the SRS resources will be sorted as, for example, Resource ID#2, Resource ID#1, Resource ID#4, Resource ID#5, Resource ID#3, and Resource ID#6. Alternatively, the interlaced order may indicate that the SRS resources will be sorted as, for example, Resource ID#1, Resource ID#2, Resource ID#5, Resource ID#4, Resource ID#3, and Resource ID#6. In some aspects, the predefined order may include any combination of ascending order, arrangement order, interleaved order, and / or interlaced order.

[0064] As shown by reference numeral 320, the configuration information may include SRS configuration information associated with transmitting the SRS information. As shown by reference numeral 330, at least partially based on the SRS configuration information, the UE 120 may configure the UE 120 to transmit the SRS information.

[0065] In some aspects, the SRS configuration information may enable the UE 120 to configure the UE 120 to transmit the SRS information including the selected SRS resources using the selected SRS ports at least partially based on the included reconfiguration information. The reconfiguration information may be received from the BS 110 via dynamic signaling during data communication. The dynamic signaling may include MAC CE, DCI, or a combination thereof, and may include reconfiguration information associated with the selected SRS ports and / or the selected SRS resources.

[0066] Regarding SRS resources, the reconfiguration information may explicitly indicate one or more SRS resource identifiers of one or more selected SRS resources to be included in the SRS information. At least partially based on receiving the reconfiguration information, UE 120 may transmit SRS information including the one or more selected SRS resources.

[0067] In some aspects, the reconfiguration information may indicate the number (e.g., quantity) of selected SRS resources to be included in the SRS information. In some aspects, the number of selected SRS resources may be less than the total number of configured SRS resources. In some aspects, the number of selected SRS resources may be sufficient for BS 110 to estimate a measure of the quality associated with uplink communication from UE 120 to BS 110. The number may include the number of SRS resources selected from one or more of the SRS resource sets. In some aspects, the reconfiguration information may identify one or more resource sets via a resource set identifier (e.g., SRS resource set 1, SRS resource set 2, etc.). In the case where the reconfiguration information does not identify a resource set identifier, UE 120 may include the number of SRS resources from all configured SRS resources.

[0068] In one example, the reconfiguration information may indicate that, for example, one SRS resource from SRS resource set 1 is to be included in the SRS information. At least partially based on receiving the reconfiguration information, UE 120 may transmit SRS information including, for example, resource ID #2. In another example, the reconfiguration information may indicate that, for example, two SRS resources from each of SRS resource set 1 and SRS resource set 2 are to be included in the SRS information. At least partially based on receiving the reconfiguration information, UE 120 may transmit SRS information that includes, for example, resource ID #3 and resource ID #6 from SRS resource set 1 and resource ID #1 and resource ID #5 from SRS resource set 2.

[0069] In some aspects, the reconfiguration information may update a predefined order included in the initial configuration. For example, the reconfiguration information may update an order from low to high, an arrangement order, an interleaving order, and / or an interlacing order included in the initial configuration. In one example, the reconfiguration information may indicate that the selected SRS resources are to be sorted in a high-to-low order instead of the predefined low-to-high order. In such a case, UE 120 may transmit SRS information including the selected SRS resources sorted as, for example, resource ID #6, resource ID #5, resource ID #4, resource ID #3, resource ID #2, and resource ID #1.

[0070] In another example, the reconfiguration information may update the interleaving order to indicate that the selected SRS resources from SRS resource set 2 will be included before the selected SRS resources from SRS resource set 1. Additionally, the configuration information may indicate that three selected SRS resources will be included in the SRS information. In this case, UE 120 may transmit SRS information including the selected SRS resources sorted as, for example, resource ID #1, resource ID #5, and resource ID #2. Similarly, the reconfiguration information may update the permutation order and / or the interleaving order included in the predefined order.

[0071] In some aspects, the reconfiguration information may include a bitmap and / or a code point that includes one or more bit fields to indicate a combination of at least one of the number of selected SRS resources and information identifying the SRS resources or an ordered list of SRS resource identifiers. For example, as shown in example 500 of Figure 5 the bitmap and / or the code point may indicate that two selected SRS resources (i.e., the first SRS resource from SRS resource set 1 and the first SRS resource from SRS resource set 2) will be included in the SRS information (code point / bitmap 00). At least partially based on receiving the reconfiguration information, UE 120 may transmit SRS information including, for example, resource ID #2 and resource ID #1. The bitmap and / or the code point may indicate that one selected SRS resource (i.e., the first SRS resource from SRS resource set 1) will be included in the SRS information (code point / bitmap 01). At least partially based on receiving the reconfiguration information, UE 120 may transmit SRS information including, for example, resource ID #2. The bitmap and / or the code point may indicate that two selected SRS resources identified via SRS resource identifiers from SRS resource set 1 will be included in the SRS information (code point / bitmap 10). For example, the reconfiguration information may identify resource ID #4 and resource ID #3 as the two selected SRS resources to be included in the SRS information. The bitmap and / or the code point may indicate that three selected SRS resources (two SRS resources from SRS resource set 1 and one SRS resource from SRS resource set 2) will be included in the SRS information (code point / bitmap 11). At least partially based on receiving the reconfiguration information, UE 120 may transmit SRS information that includes, for example, resource ID #3 and resource ID #6 from SRS resource set 1 and resource ID #5 from SRS resource set 2.

[0072] In some aspects, the DCI may indicate a triggered SRS resource set (e.g., the SRS resource set for which the UE 120 will transmit SRS information) and indicate the number of selected SRS resources to be included. When the selected SRS resources are associated with antenna switching and come from multiple SRS resource sets, the number indicated by the DCI may indicate the total number of selected SRS resources from the multiple SRS resource sets. For example, with respect to Figure 4 Example 400, when the DCI indicates that SRS resource set 1 and SRS resource set 2 are triggered and indicates that the number of selected SRS resources is 2, for example, the first SRS resource from SRS resource set 1 (e.g., resource ID #2) and the first SRS resource from SRS resource set 2 (e.g., resource ID #1) may be included in the SRS information. In some aspects, the reconfiguration information may be different at least in part based on the usage and temporal behavior associated with the selected SRS resources (e.g., antenna switching operations, codebook operations, non-codebook operations, etc.).

[0073] In some aspects, the MAC CE may deactivate one or more SRS resources in a superset that includes the configured SRS resources, and the DCI may dynamically indicate the number of selected SRS resources in the remaining portion of the SRS resources not deactivated by the MAC CE. For example, the MAC CE may deactivate, for example, resource ID #2 and resource ID #5. The DCI may dynamically indicate that a certain number (e.g., one, two, three, or four) of the selected SRS resources among resource ID #4, resource ID #3, resource ID #6, and resource ID #1 will be included in the SRS information.

[0074] In some aspects, the DCI may include an SRS request indicator (SRI) for indicating the number of selected SRS resources. In some aspects, a bit field included in the SRI may indicate the number of selected SRS resources. The bit field may include an existing SRI bit field included in, for example, DCI format 0_1 and / or 0_2 without data transmission. In some aspects, the DCI may be modified to repurpose a bit field for indicating the number of selected SRS resources. In some aspects, such a repurposed bit field may also indicate the SRS resource identifier of the selected SRS resources to be included in the SRS information. The repurposed bit field may include a bit field associated with the scheduling of resources transmitted in a non-scheduled DCI format (e.g., modulation and coding scheme (MCS) scheduling, time domain resource assignment (TDRA), frequency domain resource assignment (FDRA), etc.).

[0075] Regarding the selected ports, the reconfiguration information (e.g., MAC CE and / or DCI) may indicate one or more selected SRS ports to be used by the UE 120 for transmitting SRS information. In some aspects, the reconfiguration information may indicate the number of selected SRS ports to be used for transmitting the selected SRS resources from a given SRS resource set. For example, the reconfiguration information may indicate a first number of selected SRS ports to be used for transmitting the selected SRS resources from SRS resource set 1 and a second number of selected SRS ports to be used for transmitting the selected SRS resources from SRS resource set 2. In some aspects, the first number may be different from the second number. In some aspects, the reconfiguration information may indicate the number of selected SRS ports to be used for transmitting the selected SRS resources from all triggered SRS resource sets. For example, the reconfiguration information may indicate a first number of selected SRS ports to be used for transmitting the selected SRS resources from triggered SRS resource set 1 and a second number of selected SRS ports to be used for transmitting the selected SRS resources from triggered SRS resource set 2. At least in part based on receiving the reconfiguration information, the UE 120 may utilize the first number of selected SRS ports to transmit SRS information when SRS resource set 1 is triggered and may utilize the second number of selected SRS ports to transmit SRS information when SRS resource set 2 is triggered. In some aspects, SRS resource set 1 and SRS resource set 2 may be triggered simultaneously.

[0076] In some aspects, the first number may be the same as the second number.

[0077] In some aspects, all triggered SRS resource sets may be associated with antenna switching operations.

[0078] In some aspects, when the MAC CE deactivates one or more selected SRS resources, as previously discussed, the DCI may indicate the number of SRS ports to be used for transmitting the remaining portion of the selected SRS resources not deactivated by the MAC CE.

[0079] In some aspects, the configuration information may enable the UE 120 to configure the UE 120 to transmit SRS information at least in part based on the time of receiving reconfiguration information (e.g., MAC CE and / or DCI). For example, the UE 120 may transmit SRS information at least in part based on the reconfiguration information included in the MAC CE after the MAC CE time duration. In some aspects, the MAC CE time duration may include 3 milliseconds after receiving the MAC CE and an incremental time duration (e.g., a duration associated with a given number of incremental time symbols). Similarly, the UE 120 may transmit SRS information at least in part based on the reconfiguration information included in the DCI after the DCI time duration. In some aspects, the DCI time duration may include a processing time duration after receiving the DCI (e.g., a time duration associated with processing the information included in the DCI and transmitting the SRS information) and an incremental time duration. In some aspects, a given number of incremental time symbols may be associated with the subcarrier spacing used for transmitting the MAC CE and / or DCI. In some aspects, a given number of incremental time symbols may be different at least in part based on the usage and time behavior associated with the selected SRS resource (e.g., antenna switching operations, codebook operations, non-codebook operations, etc.).

[0080] In some aspects, when the UE 120 is in communication with multiple TRPs associated with the BS 110, the selected SRS resource and / or the selected SRS port may be associated with a given transmit-receive point (TRP). In some aspects, the selected SRS resource and / or the selected SRS port may be associated with one or more codebook and / or non-codebook operation sets. In some aspects, a given TRP may deactivate one or more selected SRS resources via the MAC CE and / or DCI. If the given TRP uses DCI for deactivation, such deactivation may be indicated via the SRI field included in the DCI.

[0081] In some aspects, the UE 120 may perform power control when using a given selected SRS port to determine the amount of transmit power to be used for transmitting SRS information. In some aspects, the UE 120 may determine a scaling factor to determine the amount of transmit power. For example, in some aspects, the UE 120 may divide the total power associated with transmitting SRS information among the indicated number of selected SRS ports. In some aspects, the configuration information may configure and the reconfiguration information may reconfigure the transmit power for a given set of SRS resources. For example, the configuration information may configure and the reconfiguration information may reconfigure a first transmit power for transmitting SRS information including the selected SRS resources from SRS resource set 1 and a second transmit power for transmitting SRS information including the selected SRS resources from SRS resource set 2.

[0082] In some aspects, the current transmission of SRS information may include an SRS resource that is at least partially based on reconfiguration information. The current transmission may be associated with, for example, the next transmission of SRS information currently determined by UE 120. In some aspects, the current transmission may include a selected SRS resource from an SRS resource set triggered by reconfiguration information received via DCI. In some aspects, a future transmission of SRS information may include a selected SRS resource from an SRS resource set triggered by reconfiguration information received via MAC CE. The future transmission may be a transmission of SRS information after the current transmission of SRS information.

[0083] Alternatively, UE 120 may transmit the current and future transmissions at least partially based on the last received reconfiguration information until UE 120 receives new reconfiguration information. In such a case, the current and future transmissions may include selected SRS resources from an SRS resource set triggered by the last received reconfiguration information received via MAC CE until new reconfiguration information and / or deactivation information for deactivating one or more selected SRS resources is received via another MAC CE and / or DCI. Similarly, the current and future transmissions may include selected SRS resources from an SRS resource set triggered by the last received reconfiguration information received via DCI until new reconfiguration information is received via another MAC CE and / or DCI.

[0084] In some aspects, UE 120 may transmit the current and / or future transmissions at least partially based on previous reconfiguration information for a previous transmission of SRS information. Alternatively, UE 120 may transmit the current and / or future transmissions at least partially based on a default configuration predetermined by BS 110 and provided to UE 120 via, for example, configuration information.

[0085] As shown by reference numeral 340, UE 120 may transmit SRS information at least partially based on received configuration information and / or SRS configuration information, as discussed above. In some aspects, UE 120 may utilize the included transmission circuitry to transmit SRS information and may utilize the included reception circuitry to receive configuration information and / or SRS configuration information. The transmission circuitry may include, for example, one or more components (e.g., transmit processor 264, TX MIMO processor 266, modulator 254, and / or antenna 252), and the reception circuitry may include, for example, one or more components (e.g., receive processor 258, MIMO detector 256, demodulator 254, and / or antenna 252), as discussed above with respect to Figure 2 as discussed. In some aspects, UE 120 may include the UE 120 as discussed with respect to Figure 2 as discussed.

[0086] By utilizing dynamic reconfiguration associated with transmitting SRS information, as discussed herein, a UE may utilize a selected SRS port to transmit SRS information that includes a selected SRS resource with a metric sufficient for a BS to estimate the quality associated with uplink communication. In this manner, the BS can adequately receive uplink communication from the UE, and data communication between the UE and the BS can continue without interruption. Additionally, transmitting SRS information that includes a selected SRS resource with a metric sufficient for the BS to estimate the quality associated with uplink communication can enable efficient utilization of UE resources (e.g., throughput, memory utilization, etc.) and network resources (e.g., bandwidth, subchannels, etc.), and data communication between the UE and the BS can be improved.

[0087] As indicated above, Figures 3 - 5 is provided as an example. Other examples may be different from the example regarding Figures 3 - 5 described.

[0088] Figure 6 is a diagram illustrating an example process 600 performed, for example, by a UE (e.g., UE 120) in accordance with various aspects of the present disclosure. Example process 600 is an example of operations performed by a UE associated with dynamic reconfiguration associated with transmitting SRS information.

[0089] As Figure 6 shown, in some aspects, process 600 may include receiving configuration information including an SRS configuration associated with a configured SRS resource (block 610). For example, a UE (e.g., using the receiving component 702 depicted in Figure 7 ) may receive configuration information including an SRS configuration associated with a configured SRS resource, as described above.

[0090] As Figure 6 further shown, in some aspects, process 600 may include receiving a MAC CE or DCI including reconfiguration information associated with the SRS resource (block 620). For example, a UE (e.g., using the receiving component 702 depicted in Figure 7 ) may receive a MAC CE or DCI including reconfiguration information associated with the SRS resource, as described above.

[0091] As Figure 6 further shown, in some aspects, process 600 may include transmitting, at least in part based on the reconfiguration information, SRS information including a selected SRS resource selected from the configured SRS resources using a selected SRS port (block 630). For example, a UE (e.g., using Figure 7The transmission component 704 depicted in [description] may transmit SRS information including a selected SRS resource selected from the configured SRS resources using a selected SRS port, at least in part based on the reconfiguration information, as described above.

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

[0093] In a first aspect, the number of selected SRS resources is less than the total number of configured SRS resources.

[0094] In a second aspect, either alone or in combination with the first aspect, the configuration information includes an SRS resource identifier, an ordered list of SRS resource identifiers, or a predefined pattern associated with the SRS resource identifier.

[0095] In a third aspect, either alone or in combination with one or more of the first and second aspects, the reconfiguration information indicates the quantity of selected SRS resources.

[0096] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the reconfiguration information indicates an SRS resource identifier associated with the selected SRS resource or a resource set identifier associated with a resource set including the selected SRS resource.

[0097] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the reconfiguration information indicates an updated order associated with the selected SRS resource.

[0098] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the reconfiguration information includes a code point associated with a combination of the number of selected SRS resources and an SRS resource identifier or an ordered list of SRS resource identifiers.

[0099] In a seventh aspect, either alone or in combination with one or more of the first to fifth aspects, the reconfiguration information includes a bit map associated with a combination of the number of selected SRS resources and an SRS resource identifier or an ordered list of SRS resource identifiers.

[0100] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the MAC CE deactivates one or more SRS resources from the SRS resources, and the DCI indicates the number of selected SRS resources from the remaining portion of the SRS resources not deactivated by the MAC CE.

[0101] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the DCI includes an SRS request indicator for indicating the number of selected SRS resources.

[0102] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the DCI includes one or more bit fields for indicating the number of selected SRS resources or the SRS resource identifier associated with the selected SRS resources.

[0103] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the reconfiguration information indicates the number of selected SRS ports.

[0104] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the reconfiguration information indicates the number of selected SRS ports associated with one or more triggered SRS resource sets.

[0105] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the MAC CE deactivates SRS resources from the SRS resources, and the DCI indicates the number of selected SRS ports associated with the remaining portion of the SRS resources not deactivated by the MAC CE.

[0106] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, transmitting SRS information includes transmitting SRS information at least partially based on the reception time associated with the MAC CE or the reception time associated with the DCI.

[0107] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, the selected SRS resources and the selected SRS ports are associated with a transmission reception point among a plurality of transmission reception points in communication with the UE.

[0108] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the number of selected SRS ports is associated with the transmission power related to transmitting SRS information.

[0109] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the transmission power is associated with the selected SRS resources included in a given SRS resource set.

[0110] In an eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, transmitting SRS information includes transmitting SRS information at least partially based on the reconfiguration information during the current transmission associated with transmitting SRS information.

[0111] In a nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, transmitting SRS information includes transmitting the SRS information at least partly based on reconfiguration information during a current transmission and a future transmission associated with the transmission of the SRS information.

[0112] Although Figure 6 example blocks of process 600 are shown, in some aspects, process 600 may include additional blocks, fewer blocks, different blocks, or blocks arranged differently compared to those depicted in Figure 6 . Additionally or alternatively, two or more blocks of process 600 may be executed in parallel.

[0113] Figure 7 is a block diagram of an example device 700 for wireless communication. Device 700 may be a UE, or a UE may include device 700. In some aspects, device 700 includes a receiving component 702 and a transmitting component 704, which may be in communication with each other (e.g., via one or more buses and / or one or more other components). As shown, device 700 may use receiving component 702 and transmitting component 704 to communicate with another device 706 (such as a UE, a base station, or another wireless communication device). A determining component 708 may analyze information included in configuration information, MAC CE, and / or DCI, and at least partly based on the analysis, may determine the information to be included in the SRS information.

[0114] In some aspects, device 700 may be configured to perform one or more operations described herein in connection with Figures 3 - 5 . Additionally or alternatively, device 700 may be configured to perform one or more processes described herein, such as Figure 6 process 600. In some aspects, device 700 and / or Figure 7 one or more components shown in Figure 2 may include one or more components of the UE described above in connection with Figure 7 . Additionally or alternatively, Figure 2 one or more components shown in may be implemented within one or more components described above in connection with

[0115] The receiving component 702 may receive communications (such as reference signals, control information, data communications, or combinations thereof) from the device 706. The receiving component 702 may provide the received communications to one or more other components of the device 700. In some aspects, the receiving component 702 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.), and may provide the processed signals to one or more other components of the device 706. In some aspects, the receiving component 702 may include one or more antennas, demodulators, MIMO detectors, receiving processors, controllers / processors, memories, or combinations thereof of the UE described above in connection with Figure 2 one or more of the antennas, demodulators, MIMO detectors, receiving processors, controllers / processors, memories, or combinations thereof of the UE described above.

[0116] The transmitting component 704 may transmit communications (such as reference signals, control information, data communications, or combinations thereof) to the device 706. In some aspects, one or more other components of the device 706 may generate the communications and may provide the generated communications to the transmitting component 704 for transmission to the device 706. In some aspects, the transmitting component 704 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.), and may transmit the processed signals to the device 706. In some aspects, the transmitting component 704 may include one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the UE described above in connection with Figure 2 one or more of the antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the UE described above. In some aspects, the transmitting component 704 may be co-located with the receiving component 702 in a transceiver.

[0117] The receiving component 702 may receive configuration information including an SRS configuration associated with the configured SRS resource. The receiving component 702 may receive a MAC CE or DCI including reconfiguration information associated with the SRS resource. The transmitting component 704 may transmit SRS information including a selected SRS resource selected from the configured SRS resources using a selected SRS port at least in part based on the reconfiguration information.

[0118] Figure 7 The number and arrangement of the components shown in Figure 7 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components compared to those shown in Figure 7 In addition, two or more of the components shown in Figure 7 may be implemented in a single component, or Figure 7 a single component shown in Figure 7One or more functions performed by another set of components shown in

[0119] The following provides an overview of some aspects of the present disclosure:

[0120] Aspect 1: A wireless communication method performed by a user equipment (UE), comprising: receiving configuration information including SRS configuration associated with a configured sounding reference signal (SRS) resource; receiving a media access control (MAC) control element (MAC CE) or downlink control information (DCI) including reconfiguration information associated with the SRS resource; and transmitting SRS information including a selected SRS resource selected from the configured SRS resources using a selected SRS port at least partially based on the reconfiguration information.

[0121] Aspect 2: The method of Aspect 1, wherein the number of selected SRS resources is less than the total number of configured SRS resources.

[0122] Aspect 3: The method of any one of Aspects 1-2, wherein the configuration information includes an SRS resource identifier, an ordered list of SRS resource identifiers, or a predefined pattern associated with the SRS resource identifier.

[0123] Aspect 4: The method of any one of Aspects 1-3, wherein the reconfiguration information indicates the number of selected SRS resources.

[0124] Aspect 5: The method of any one of Aspects 1-4, wherein the reconfiguration information indicates an SRS resource identifier associated with the selected SRS resource or a resource set identifier associated with a resource set including the selected SRS resource.

[0125] Aspect 6: The method of any one of Aspects 1-5, wherein the reconfiguration information indicates an updated order associated with the selected SRS resource.

[0126] Aspect 7: The method of any one of Aspects 1-6, wherein the reconfiguration information includes a code point associated with a combination of the number of selected SRS resources and an SRS resource identifier or an ordered list of SRS resource identifiers.

[0127] Aspect 8: The method of any one of Aspects 1-6, wherein the reconfiguration information includes a bit map associated with a combination of the number of selected SRS resources and an SRS resource identifier or an ordered list of SRS resource identifiers.

[0128] Aspect 9: The method of any one of Aspects 1-8, wherein the MAC CE deactivates one or more SRS resources from the SRS resource, and the DCI indicates the number of selected SRS resources in the remaining part of the SRS resources not deactivated by the MAC CE.

[0129] Aspect 10: The method according to any one of Aspects 1-9, wherein the DCI includes an SRS request indicator for indicating the number of selected SRS resources.

[0130] Aspect 11: The method according to any one of Aspects 1-10, wherein the DCI includes one or more bit fields for indicating the number of selected SRS resources or an SRS resource identifier associated with the selected SRS resources.

[0131] Aspect 12: The method according to any one of Aspects 1-11, wherein the reconfiguration information indicates the number of selected SRS ports.

[0132] Aspect 13: The method according to any one of Aspects 1-12, wherein the reconfiguration information indicates the number of selected SRS ports associated with one or more triggered SRS resource sets.

[0133] Aspect 14: The method according to any one of Aspects 1-13, wherein the MAC CE deactivates SRS resources from an SRS resource, and the DCI indicates the number of selected SRS ports associated with the remaining portion of the SRS resources not deactivated by the MAC CE.

[0134] Aspect 15: The method according to any one of Aspects 1-14, wherein transmitting SRS information includes transmitting the SRS information at least partially based on the reception time associated with the MAC CE or the reception time associated with the DCI.

[0135] Aspect 16: The method according to any one of Aspects 1-15, wherein the selected SRS resources and the selected SRS ports are associated with a transmission reception point among a plurality of transmission reception points in communication with the UE.

[0136] Aspect 17: The method according to any one of Aspects 1-16, wherein the number of selected SRS ports is associated with the transmit power related to transmitting the SRS information.

[0137] Aspect 18: The method according to any one of Aspects 1-17, wherein the transmit power is associated with the selected SRS resources included in a given SRS resource set.

[0138] Aspect 19: The method according to any one of Aspects 1-18, wherein transmitting SRS information includes transmitting the SRS information at least partially based on the reconfiguration information during the current transmission associated with transmitting the SRS information.

[0139] Aspect 20: The method according to any one of Aspects 1-19, wherein transmitting SRS information includes transmitting the SRS information at least partially based on the reconfiguration information during the current transmission and future transmissions associated with transmitting the SRS information.

[0140] Aspect 21: An apparatus for wireless communication at a device, comprising: a processor, a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform the method of one or more of Aspects 1 - 20.

[0141] Aspect 22: A device for wireless communication, comprising: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more of Aspects 1 - 20.

[0142] Aspect 23: A device for wireless communication, comprising: at least one means for performing the method of one or more of Aspects 1 - 20.

[0143] Aspect 24: A non - transient computer - readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of Aspects 1 - 20.

[0144] Aspect 25: A non - transient computer - readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1 - 20.

[0145] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations can be made in light of the above disclosure or obtained through practice of the aspects.

[0146] As used herein, the term "component" is intended to be broadly construed as a combination of hardware and / or hardware and software. "Software" should be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, sub - programs, software modules, applications, software applications, software packages, routines, sub - routines, objects, executables, execution threads, procedures, and / or functions, etc., regardless of whether it is referred to in terms of software, firmware, middleware, microcode, hardware description language, or other terms. As used herein, a processor is implemented with hardware 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 and / or a combination of hardware and software. The actual specific control hardware or software code for implementing these systems and / or methods does not limit the aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software code - understanding that software and hardware can be designed to implement these systems and / or methods at least in part based on the description herein.

[0147] As used herein, depending on the context, meeting a threshold may mean that a value is greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and so on.

[0148] Although specific feature combinations are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the various aspects. In fact, many of these features can be combined in ways not specifically recited in the claims and / or not disclosed in the specification. Although each of the dependent claims listed below may directly depend on only one claim, the disclosure of the various aspects includes each dependent claim in combination with each other claim in this set of claims. As used herein, the phrase reciting "at least one of" a list of items means any combination of these items, including a single member. By way of example, "at least one of a, b, or c" is intended to cover: a, b, c, a - b, a - c, b - c, and a - b - c, as well as any combination having multiple identical elements (e.g., a - a, a - a - a, a - a - b, a - a - c, a - b - b, a - c - c, b - b, b - b - b, b - b - c, c - c, and c - c - c, or any other ordering of a, b, and c).

[0149] Elements, acts, or instructions used herein should not be construed as critical or essential unless expressly described as such. Also, as used herein, the articles "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more." Additionally, as used herein, the article "the" is intended to include one or more items referenced in conjunction with the article "the" and may be used interchangeably with "one or more." Further, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and may be used interchangeably with "one or more." Where only one item is intended, the phrase "only one" or similar language is used. Also, as used herein, the terms "has," "contains," "includes," etc. are intended to be open - ended terms. Additionally, the phrase "based on" is intended to mean "at least partially based on" unless otherwise expressly stated. Also, as used herein, the term "or" when used in a series is intended to be inclusive and may be used interchangeably with "and / or" unless otherwise expressly stated (e.g., when used in conjunction with "any one of" or "only one of").

Claims

1. A user equipment (UE) for wireless communication, comprising: One or more memories; And One or more processors, the one or more processors being coupled to the one or more memories and configured to: Receive configuration information including SRS configuration associated with a configured sounding reference signal (SRS) resource; Receive a media access control (MAC) control element (MAC CE) or downlink control information (DCI) including reconfiguration information associated with a selected SRS resource and a selected SRS port selected from the configured SRS resources; And Transmit SRS information including the selected SRS resource using the selected SRS port at least partially based on the reconfiguration information.

2. The UE according to claim 1, wherein the one or more processors are configured to dynamically receive the MAC CE or the DCI from a base station.

3. The UE according to claim 1, wherein the configuration information includes an SRS resource identifier, an ordered list of the SRS resource identifiers, or a predefined pattern associated with the SRS resource identifier.

4. The UE according to claim 1, wherein the reconfiguration information indicates the number of selected SRS resources.

5. The UE according to claim 1, wherein the reconfiguration information indicates an SRS resource identifier associated with the selected SRS resource or a resource set identifier associated with a resource set including the selected SRS resource.

6. The UE according to claim 1, wherein the reconfiguration information indicates an updated order associated with the selected SRS resource.

7. The UE according to claim 1, wherein the reconfiguration information includes a code point associated with a combination of the number of selected SRS resources and an SRS resource identifier or an ordered list of the SRS resource identifiers.

8. The UE according to claim 1, wherein the reconfiguration information includes a bit map associated with a combination of the number of selected SRS resources and an SRS resource identifier or an ordered list of the SRS resource identifiers.

9. The UE according to claim 1, wherein the MAC CE deactivates one or more SRS resources from the SRS resources, and the DCI indicates the number of selected SRS resources in the remaining portion of the SRS resources not deactivated by the MAC CE.

10. The UE according to claim 1, wherein the DCI includes an SRS request indicator for indicating the number of selected SRS resources.

11. The UE according to claim 1, wherein the DCI includes one or more bit fields for indicating the number of selected SRS resources or an SRS resource identifier associated with the selected SRS resources.

12. The UE according to claim 1, wherein the reconfiguration information indicates the number of selected SRS ports.

13. The UE according to claim 1, wherein the reconfiguration information indicates the number of selected SRS ports associated with one or more triggered SRS resource sets.

14. The UE according to claim 1, wherein the MAC CE deactivates the SRS resources from the SRS resource, and the DCI indicates the number of selected SRS ports associated with the remaining part of the SRS resources not deactivated by the MAC CE.

15. The UE according to claim 1, wherein the one or more processors are configured to transmit the SRS information at least partially based on the reception time associated with the MAC CE or the reception time associated with the DCI when transmitting the SRS information.

16. The UE according to claim 1, wherein the selected SRS resources and the selected SRS ports are associated with a transmission reception point among a plurality of transmission reception points in communication with the UE.

17. The UE according to claim 1, wherein the number of selected SRS ports is associated with the transmission power related to transmitting the SRS information.

18. The UE according to claim 1, wherein the transmission power is associated with the selected SRS resources included in a given SRS resource set.

19. The UE according to claim 1, wherein the one or more processors are configured to transmit the SRS information at least partially based on the reconfiguration information during the current transmission associated with transmitting the SRS information when transmitting the SRS information.

20. The UE according to claim 1, wherein the one or more processors are configured to transmit the SRS information at least partially based on the reconfiguration information during the current transmission and future transmissions associated with transmitting the SRS information when transmitting the SRS information.

21. A wireless communication method performed by a user equipment (UE), comprising: receiving configuration information including SRS configuration associated with configured sounding reference signal (SRS) resources; receiving a media access control (MAC) control element (MAC CE) or downlink control information (DCI) including reconfiguration information associated with selected SRS resources and selected SRS ports selected from the configured SRS resources; and transmitting SRS information including the selected SRS resources using the selected SRS ports at least partially based on the reconfiguration information.

22. The method according to claim 21, wherein the number of selected SRS resources is less than the total number of configured SRS resources.

23. The method according to claim 21, wherein the configuration information includes an SRS resource identifier, an ordered list of the SRS resource identifiers, or a predefined pattern associated with the SRS resource identifier.

24. The method according to claim 21, wherein the reconfiguration information indicates the quantity of the selected SRS resources.

25. The method according to claim 21, wherein the reconfiguration information indicates an SRS resource identifier associated with the selected SRS resources or a resource set identifier associated with a resource set including the selected SRS resources.

26. The method according to claim 21, wherein the reconfiguration information indicates an updated order associated with the selected SRS resources.

27. The method according to claim 21, wherein the reconfiguration information includes a code point associated with a combination of the number of selected SRS resources and an SRS resource identifier or an ordered list of the SRS resource identifiers.

28. The method according to claim 21, wherein the reconfiguration information includes a bit map associated with a combination of the number of selected SRS resources and an SRS resource identifier or an ordered list of the SRS resource identifiers.

29. The method according to claim 21, wherein the MAC CE deactivates one or more SRS resources from the SRS resources, and the DCI indicates the number of selected SRS resources in the remaining part of the SRS resources not deactivated by the MAC CE.

30. The method according to claim 21, wherein the DCI includes an SRS request indicator for indicating the number of selected SRS resources.

31. The method according to claim 21, wherein the DCI includes one or more bit fields for indicating the number of selected SRS resources or an SRS resource identifier associated with the selected SRS resources.

32. The method according to claim 21, wherein the reconfiguration information indicates the number of selected SRS ports.

33. The method according to claim 21, wherein the reconfiguration information indicates the number of selected SRS ports associated with one or more triggered SRS resource sets.

34. The method according to claim 21, wherein the MAC CE deactivates SRS resources from the SRS resources, and the DCI indicates the number of selected SRS ports associated with the remaining part of the SRS resources not deactivated by the MAC CE.

35. The method according to claim 21, wherein transmitting the SRS information includes transmitting the SRS information at least partially based on a reception time associated with the MAC CE or a reception time associated with the DCI.

36. The method according to claim 21, wherein the selected SRS resources and the selected SRS ports are associated with a transmission reception point among a plurality of transmission reception points in communication with the UE.

37. The method according to claim 21, wherein the number of selected SRS ports is associated with a transmission power related to transmitting the SRS information.

38. The method according to claim 21, wherein the transmission power is associated with the selected SRS resources included in a given SRS resource set.

39. The method according to claim 21, wherein transmitting the SRS information includes transmitting the SRS information at least partially based on the reconfiguration information during a current transmission associated with transmitting the SRS information.

40. The method according to claim 21, wherein transmitting the SRS information includes transmitting the SRS information at least partially based on the reconfiguration information during a current transmission and a future transmission associated with transmitting the SRS information.

41. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including: One or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to: Receive configuration information including a sounding reference signal (SRS) configuration associated with a configured SRS resource; Receive a media access control (MAC) control element (MAC CE) or downlink control information (DCI) including reconfiguration information associated with a selected SRS resource and a selected SRS port selected from the configured SRS resources; And Transmit SRS information including the selected SRS resource using the selected SRS port at least in part based on the reconfiguration information.

42. A device for wireless communication, comprising: Means for receiving configuration information including an SRS configuration associated with a configured SRS resource; Means for receiving a MAC control element (MAC CE) or downlink control information (DCI) including reconfiguration information associated with a selected SRS resource and a selected SRS port selected from the configured SRS resources; And Means for transmitting SRS information including the selected SRS resource using the selected SRS port at least in part based on the reconfiguration information.

Images